SD-01 DM16-MN-LAB-PM0-10100 RA Boiler Feed Water System

Project Dwg. No.:

DM16-MN-LAB-PM0-10100

SAUDI RABIGH IWSP PROJECT

O &M MANUAL SYSTEM DESCRIPTION Boiler Feed Water System Manual No. SD-01

This system description manual is intended to provide Rabigh IWSP Project O&M personnel with the basic understanding of the Boiler Feed Water System equipment and components. No part of this document may be reproduced for use by parties other than Mitsubishi Heavy Industries, Ltd. and Saudi Rabigh IWSP Project.

FINAL O &M Manual

System Description Descripti on SD-01

Rev.A

RAWEC Project Dwg. No: DM16-MN-LAB-PM010100

Saudi Rabigh IWSP Project O & M Manual

Boiler Feed Water System

Date: February 2009 File Name: SD-01.PDF

SYSTEM DESCRIPTION BOILER FEED WATER SYSTEM REVISION A – FEBRUARY 2009

O & M Manual

System Description

SD-01

RAWEC Project Dwg. No: DM16-MN-LAB-PM010100

Saudi Rabigh IWSP Project O & M Manual


Date: February 2009 File Name: SD-01.PDF

SYSTEM DESCRIPTION BOILER FEED WATER SYSTEM REVISION A – FEBRUARY 2009

O & M Manual

System Description

SD-01

Table of Contents


Rev. A

AMENDMENT RECORD Page Number

Description of Amendment

Modified as per MOC-12-005

O & M Manual

Amendment Issue Date

Date Amended Pages Inserted

21-May-15

21-May-15 Page 38

System Description

SD-01

Table of Contents


Rev. A

SYSTEM DESCRIPTION BOILER FEED WATER SYSTEM TABLE OF CONTENTS PAGE 1.0

2.0

3.0

4.0

O & M Manual

GENERAL

1

1.1

Introduction

1

1.2

Purpose and Scope

1

1.3

References 1.3.1 P&ID

2 2

1.3.2

Control and Logic Diagrams

3

1.3.3

Vendor Information

3

FLOW PATH

4

2.1

Overview

4

2.2

Flow Path 2.2.1 Boiler Feed Water Booster Pump

5 6

2.2.2

Boiler Feed Pump (TBFP & MBFP)

7

2.2.3

HHP Boiler Feed Water Pump

11

2.2.4

HP Boiler Feed Water Pump

14

2.2.5

HP Feed Water Heater

17

2.2.6

Cooling, Mechanical Sealing & Lubrication of Boiler 23 Feed Pump / Booster Pump

2.2.7

Cooling, Mechanical Sealing & Lubrication of HHP / HP Boiler Feed Water Pump

25

MAJOR EQUIPMENT

47

3.1

Boiler Feed Water Booster Pump (TBFP-BP / MBFP-BP)

47

3.2

Boiler Feed Pump (TBFP & MBFP)

49

3.3

MBFP Speed up Gear

51

3.4


53

3.5


55

3.6

HP Heater

57

TECHNICAL DATA OF MAJOR EQUIPMENT

60

System Description

SD-01

Table of Contents


Rev. A

TABLE OF CONTENTS (CONT'D)

PAGE 5.0

6.0

7.0

PROCESS CONTROL

67

5.1

MBFP, TBFP, HHP BFWP & HP BFWP Control

67

5.2

Minimum Flow Recirculation Control for BFP, HHP BFWP and HP BFWP

69

5.3

HP Feed Water Heater Level Control

69

5.4

HP Heater Feed Water Outlet Temperature Control

70

5.5

TBFP Discharge Pressure Control

70

RELATED SYSTEMS

71

6.1

Deaerator Feed Water System

71

6.2

Boiler Pressure Part and Main Steam Supply System

71

6.3

Steam Turbine and Turbine Bypass System

71

6.4

HHP/HP/MP/LP Steam System

72

6.5

Boiler Feed Pump Turbine (BFPT) System

72

6.6

Nitrogen Gas Seal System

72

6.7

Auxiliary Cooling Water System

72

INSTRUMENTATION, ALARM & TRIP SET POINTS

73

7.1

Instrumentation 7.1.1 Remote Instruments

73 73

7.1.2

74

7.2

O & M Manual

Local Indicators

Alarm & Trip Set Points

76

System Description

SD-01

Table of Contents


Rev. A


LIST OF FIGURES

FIGURE NO.

DESCRIPTION

PAGE

2-1

BOILER FEED WATER PUMP P&ID (1/7)

27

2-2


28

2-3


29

2-4


30

2-5


31

2-6


32

2-7


33

2-8

HHP BFW PUMP P&ID (1/2)

34

2-9

HHP BFW PUMP P&ID (2/2)

35

2-10

HP BFW PUMP P&ID (1/3)

36

2-11


37

2-12


38

2-13

HP HEATER P&ID (1/4)

39

2-14


40

2-15


41

2-16


42

2-17

LUBE OIL & ACW FLOW PATH OF MOTOR DRIVEN BOILER FEED WATER PUMP

43

2-18

LUBE OIL & ACW FLOW PATH FOR TURBINE DRIVEN BOILER FEED WATER PUMP

44

2-19

LUBE OIL & ACW FLOW PATH OF HHP BFW PUMP

45

2-20

LUBE OIL & ACW FLOW PATH OF HP BFW PUMP

46

3-1

SECTIONAL VIEW OF BOOSTER PUMP OF THE BOILER FEED WATER PUMP

48

O & M Manual

System Description

SD-01

Table of Contents


Rev. A


LIST OF FIGURES

FIGURE NO.

DESCRIPTION

PAGE

3-2

SECTIONAL VIEW OF BOILER FEED PUMP

50

3-3

SECTIONAL VIEW OF MBFP SPEED UP GEAR

52

3-4

SECTIONAL VIEW OF HHP BFW PUMP

54

3-5

SECTIONAL VIEW OF HP BFW PUMP

56

3-6

SECTIONAL VIEW OF HP1 HEATER

58

3-7


59

O & M Manual

System Description

SD-01

Table of Contents


Rev. A


LIST OF TABLES

TABLE NO.

DESCRIPTION

PAGE

4-1

BOILER FEED WATER BOOSTER PUMP

60

4-2

MOTOR DRIVEN BFP (MBFP)

61

4-3

MBFP SPEED UP GEAR

61

4-4

TURBINE DRIVEN BFP (TBFP)

62

4-5

HHP BFW PUMP

63

4-6

HP BFW PUMP

63

4-7

MBFP, TBFP-BP, HHP BFWP AND HP BFWP LUBE OIL PUMPS

64

4-8

HP1 HEATER

65

4-9

HP2 HEATER

66

7-1

ALARM & TRIP SET POINTS

76

O & M Manual

System Description

SD-01

Table of Contents


Rev. A

SAFETY PRECAUTIONS

These precautions are included to remind personnel of the necessity to be constantly aware of possible dangers that could cause severe or fatal injury to personnel and on occasions of severe damage to plant and equipment.

DANGER

Indicates a situation in which irresponsible action could result in death or serious injury and damage to equipment.

WARNING

Indicates a situation in which serious injury and severe damage to equipment could occur.

CAUTION

Indicates a situation in which serious personal injury or physical damage could occur.

It should be remembered that dependent on individual situations any accident irrespective of the suggested severity, could prove to be fatal or result in personal disability. Never Take Chances, Always Act Responsibly, and if in doubt, Ask!!

IMPORTANT Mitsubishi Heavy Industries as an internationally recognized Power Plant manufacturer has provided and installed Plant and Equipment for many Domestic and International clients. In all cases, the safety of the owners personnel, during their operational and maintenance activities and the safety and reliability of the equipment installed has been our prime concern. As it is not possible for MHI to predict and therefore give advice on all possible situations and eventualities, we have provided the above DANGER, WARNING, AND CAUTIONS at appropriate locations throughout the manual. Please read and pay strict attention to the notices and remember that in many cases accidents to personnel or damage to plant and equipment could be avoided, by forethought & planning and the use of only the prescribed procedures and tools.

O & M Manual

System Description

SD-01

Table of Contents


Rev. A

ABBREVIATIONS

ABB.

EXPANDED FORM

ABB.

EXPANDED FORM

AC

Alternating Current

HHP

High-High Pressure

ACW

Auxiliary Cooling Water

HP

High Pressure

BFP

Boiler Feed Pump

L

Low

BFPT

Boiler Feed Pump Turbine

LCV

Level Control Valve

BFWP

Boiler Feed Water Pump

LL

Low-Low

BP

Booster Pump

LP

Low Pressure

CCR1

Central Control Room

MBFP

Motor driven Boiler Feed Pump

CV

Control Valve

MP

Medium Pressure

CW

Cooling Water

OPS

Operator Station

DFWP

Deaerator Feed Water Pump

P&ID

Piping and Instrumentation Diagram

DP

Differential Pressure

PCV

Pressure Control Valve

DW

Demineralized Water

Pr.

Pressure

H

High

TBFP

Turbine driven Boiler Feed Pump

HH

High-High

Temp.

Temperature

O & M Manual

System Description

SD-01

Section 1 – General

1.0


Rev. A

GENERAL 1.1

Introduction The Rabigh IWSP Project is provided with sixteen (16) desalination RO trains, nine (9) boilers and five (5) steam turbine generator sets for the supply of water, steam and power to Partner. Water as per the required pressure is supplied to the boiler and the Partner through BFPs / BFWPs. Similarly, water to Partner and some of the temperature control stations is provided through the HHP and HP BFWPs. Continuous feed water flow to the boiler is to be maintained for uninterrupted power generation and process steam to the Partner. Other requirement of feed water is for temperature control in pressure reduction stations, DSH stations. Feed water at three pressure levels are produced for meeting the above requirements. As per the pressure developed, the pumps are classified as BFPs (MBFPs & TBFPs), HHP BFWPs and HP BFWPs. For increased efficiency and performance of boiler, the feed water is preheated in HP heaters. The HP heaters thus form another part of the Boiler Feed Water System which uses steam for preheating the water.

1.2

Purpose and Scope The Boiler Feed Water System starts at the deaerator outlet and ends at the boiler economizer inlet, the Partner terminals and the inlet to the various steam temperature control stations. BFPs supplying water to the boilers & various temperature control stations and HHP & HP BFWPs supplying water to the Partner are the major equipments and systems covered under this document. Other systems associated with the Boiler Feed Water System are briefed under the section “Related Systems”. The purpose this document can be summarized as to: •

•

Understand the various equipments in the Boiler Feed Water System. Give a comprehensive technical specification of all the equipments in the system.

•

Identify the flow paths of the main system.

•

Briefly understand the related systems.

•

O & M Manual

Understand the process operation and control philosophy of the main system.

System Description

SD-01


1.3


Rev. A

REFERENCES 1.3.1

P&ID •

•

•

•

•

•

•

•

•

•

•

O & M Manual

Main Flow Diagram (Overview) Project Dwg. No. DG01-MN-000-RN1-0002 Rev.5 MHI Dwg. No. 97000-2111-01A Rev.5 Boiler Feed Water Pump P&ID Project Dwg. No. DG01-MN-LAB-RN1-0001 Rev.8 MHI Dwg. No. 97000-2111-10A Rev.8 HHP BFW Pump P&ID Project Dwg. No. DG01-MN-NAB-RN1-0001 Rev. 3 MHI Dwg. No. 97000-2111-11A Rev.3 HP BFW Pump P&ID Project Dwg. No. DG01-MN-NAB-RN1-0002 Rev.5 MHI Dwg. No. 97000-2111-12A Rev.5 HP Feed Water Heater P&ID Project Dwg. No. DG01-MN-LAB-RN1-0002 Rev.8 MHI Dwg. No. 97000-2111-14A Rev.8 Deaerator P&ID Project Dwg. No. DG01-MN-LAA-RN!-0001 Rev.9 MHI Dwg. No. 97000-2111-08A Rev.9 Boiler Main P&ID Project Dwg. No. DG01-MN-LAA-RN1-0001 Rev.9 MHI Dwg. No. 97000-2111-02A Rev.9 HHP/HP Steam P&ID Project Dwg. No. DG01-MN-LBA-RN1-0001 Rev.9 MHI Dwg. No. 97000-2111-03A Rev.9 MP/LP Steam P&ID Project Dwg. No. DG01-MN-LBQ-RN1-0001 Rev.9 MHI Dwg. No. 97000-2111-04A Rev.9 Steam Turbine P&ID Project Dwg. No. DG01-MN-MA-RN1-0001 Rev.8 MHI Dwg. No. 97000-2111-05A Rev.8 Auxiliary Cooling Water P&ID Project Dwg. No. DG01-MN-PCB-RN1-0001 Rev.8 MHI Dwg. No. 97000-2131-1A Rev.8

System Description

SD-01


Boiler Feed Water System •

•

1.3.2

Nitrogen Gas Seal System P&ID Project Dwg. No. DG01-MN-QJA-RN1-0001 Rev.7 MHI Dwg. No. 97000-2136-1A Rev.7 MP Auxiliary Steam P&ID Project Dwg. No. DG01-MN-LBQ-N1-0002 Rev.5 MHI Dwg. No. 97000-2111-15A Rev.5

Control and Logic Diagrams •

•

1.3.3

Analog Control Diagram for Common Part Project Dwg. No. DG04-MN-CBP-RL4-0003 Rev.3 MHI Dwg. No. 61110-1001- Rev.3 Auxiliary Equipment Control Diagram for Common Part Project Dwg. No. DG04-MN-CBP-RL4-0003 Rev.2 MHI Dwg. No. 61130-1006 Rev.2

Vendor Information

System/Equipment

O & M Manual

Rev. A

Document No.(MHI)

Vendor

Motor Boiler Feed Pump (MBFP) & Booster Boiler Feed Pump (MBFP)

41001-1011/1201/ 1231

Torishima Pump Mfg. Co. Ltd.

Turbine Boiler Feed Pump (TBFP) & Booster Boiler Feed Pump (TBFP)

41002-1011/1201/ 1231


Booster Feed Pump Motor (BFP-Turbine)

GAE-GK-E323

MELCO, Nagasaki

MBFP -Motor

GAE-GK-E330

MELCO, Nagasaki

HHP BFW Pump

41001-2201/2202/ 2231


HHP BFW Pump Motor

GAE-GK-E334

MELCO, Nagasaki

HP BFW Pump

41001-3201/3202/ 3231


HP BFW Pump Motor

GAE-GK-E325

MELCO, Nagasaki

System Description

SD-01

Section 2 – Flow Path

2.0


Rev. A

FLOW PATH 2.1

Overview The main functions of the Boiler Feed Water System are to supply; •

•

•

•

Deaerated preheated water to the common feed water header from where feed water is drawn to the nine (9) boilers. Feed water (without preheating) to the nine (9) boilers, for cold startup and preservation purposes. Feed water (without preheating) at low pressure for temperature control of turbine bypass system, HHP, HP and MP pressure reduction stations, HP, MP, LP steam headers and burner atomizing steam pressure reducing stations. Deaerated feed water to the Partner at 143.5kg/cm2 (HHP BFW) and at 56.5kg/cm2 (HP BFW).

The Boiler Feed Water System includes the following major equipments. •

•

Two (2) motor driven BFPs (MBFPs) and three (3) turbine driven BFPs (TBFPs), each having 34% capacity Three (3) sets of HP Heaters No.1&2, each set consisting of two (2) different types of heaters connected in cascade

•

Three (3) HHP BFWPs, each having 100% capacity

•

Four (4) HP BFWPs, each having 50% capacity

O & M Manual

System Description

SD-01


2.2


Rev. A

Flow Path Flow path of this system is divided into different sections as follows for easy understanding. •

Boiler Feed Water Booster Pump

•

Boiler Feed Pump

•


•


•

HP Feed Water Heater

•

•

O & M Manual

Cooling water, mechanical sealing water and lubricating oil flow of Boiler Feed Pump / Booster Pump Cooling water, mechanical sealing water and lubricating oil flow of HHP / HP Boiler Feed Water Pump

System Description

SD-01


2.2.1


Rev. A

Boiler Feed Water Booster Pump From the three (3) deaerators, the feed water flows to the common suction header (P0LAB11BR004) of the TBFPs and MBFPs through pipelines. Individual suction lines are drawn from this header to each pump. Feed water to all the five (5) BFPs is supplied through respective booster pump. The booster pumps are driven by separate motors in case of TBFPs and by main motor itself in case of MBFPs. Figures 2-1 to 2-3 show the boiler feed water booster pump flow path. A common suction header (P0LAB11BR004) is fed with the deaerated feed water from any or all the three (3) deaerators (P0LAA01BB101, 102&103). The water to this common suction header (P0LAB11BR004) is tapped off through three (3) independent lines drawn from each deaerator. From the common suction header feed water is supplied to individual MBFP or TBFP booster pumps through separate pipe lines fitted with a manual operated butterfly valve (P0LAB11AA006/07/08/09/10) and a suction strainer (P0LAB11AT001/2/3/4/5). For interlocking purpose an open limit switch is fitted on this valve. The strainer drain with a manual operated valve (P0LAB11AA901/903/905/907/909) and a vent line with a manual operated valve (P0LAB11AA006/07/08/09/10) provided at the outlet of the butterfly valve are led to atmosphere through a drain funnel. The inlet temperature of the feed water to the booster pump is measured with a temperature element (P0LAB11CT001/2/3/4/5) fitted at the inlet of the butterfly valve. A differential pressure indicating transmitter (P0LAB11CP501/2/3/4/5) monitors the strainer differential pressure. The suction and discharge pressure of the booster pump is measured by the pressure indicator fitted at the suction (P0LAB11CP301/2/3/4/5) and discharge (P0LAB11CT306/7/8/9/10) of the booster pump. One (1) root valve is provided at the inlet and outlet of all the pressure and DP measuring instruments for isolation and maintenance purpose. A relief valve (P0LAB11AA100/1/2/3/4) at the inlet of the booster pump relieves any excess pressure on the booster pumps suction line. The discharge of the booster pump is led to the suction of the respective BFPs.

O & M Manual

System Description

SD-01


2.2.2


Rev. A

Boiler Feed Pump (TBFP & MBFP) The flow path of BFP is further split into the following subgroups for easy understanding. •

Main feed water flow path

•

Pump minimum flow recirculation

•

Pump warm up flow path

•

Intermediate stage feed water flow path

Main Feed Water Flow Path

There are two (2) MBFPs (P0LAC02AP101&102) and three (3) TBFPs (P0LAC01AP101, 102&103). Each pump is identical and designed for a capacity of 34% of total power plant requirement. The feed water flow path is identical for each pump. Figures 2-1 to 2-7 show the feed water flow paths of MBFP and TBFP. The BFPs draws feed water from the respective booster pump outlet pipe and discharges the high pressure feed water through a flow nozzle (P0LAB12CF001/5/2/4/3), stop check valve (P0LAB12AA001/3/5/7/9) and a MOV (P0LAB12AA002/4/6/8/10) to the common discharge header (P0LAB12BR006). The MOV is fitted with limit switches and position feed back transmitters for indication and interlocking. A pressure indicating transmitter (P0LAB12CP106) is fitted on the common feed water supply header. A drain station consisting of two (2) manual operated valves (P0LAB12AA900901/902-903/904-905/906-907908-909) at the outlet side of the stop check valve discharges water to atmosphere through a drain funnel. The outlet flow of each pump is measured by a flow indicating transmitter (P0LAB12CF101/2/3/4/5) fitted across the flow nozzle. Pump discharge pressure is monitored at local through a pressure indicator (P0LAB12CP301/2/3/4/5) fitted before the flow nozzle and a pressure indicating transmitter (P0LAB12CP101/2/3/4/5) at LCR fitted after the flow nozzle. Two (2) root valves are fitted at both the inlet and outlet of all the pressure indicators and transmitters. Three (3) independent lines are drawn from the common discharge header (P0LAB12BR006) which feeds water to the boiler feed water common header (P0LAB41BR007) either through HP 1 & 2 heaters (P0LAD01AC101, 102&103 and P0LAD02AC101, 102&103) or through a MOV (P0LAB41AA009) bypassing the heaters (Heater flow path is detailed under section 2.2.5).

O & M Manual

System Description

SD-01



Rev. A

The feed water from the common discharge header (P0LAB41BR007) is supplied to individual boiler through a manual operated valve (B1B9LAB41AA017). Note:

Two (2) numbers of manual operated valves (P0LAB53AA015&016) are provided in the feed water header (P0LAB53BR017) which is normally kept open. These valves are provided for construction and commissioning of the system in phases.

One (1) more supply line is drawn from the BFP discharge header (P0LAB12BR006) and connected to another header (P0LAB53BR001) which feeds non-preheated water used for boiler cold startup and preservation. Individual lines are drawn from this header to each boiler and the flow path is identical for all boilers. A manual operated valve (B1-B9LAB53AA003) is provided in each line at the outlet of the header, for isolation purposes of individual boiler. Note:

Two (2) numbers of manual operated valves (P0LAB53AA001&002) are provided in the feed water header (P0LAB53BR001) which is normally kept open. These valves are provided for construction and commissioning of the system in phases.

P u m p M i n i m u m F l o w R e c i r c u l at i o n

During the plant startup and low load plant operation, the feed water requirement is less than the minimum design flow of the pump. To prevent the pump from overheating and cavitation damage, each of the five (5) BFPs has an individual minimum flow recirculation line (P0LAB12BR010/013/016/019/022). The pump minimum flow recirculation line routes the feed water to the deaerators (P0LAA01BB101, 102&103) from a point downstream of the pump discharge flow nozzle (P0LAB12CF001/2/3/4/5). The flow path of each pump minimum recirculation line is identical. The pump minimum flow recirculation line (P0LAB12BR010/013/016/019/022) tapped off after the flow nozzle (P0LAB12CF001/2/3/4/5) recirculates feed water to the deaerator via a minimum FCV (P0LAB12AA700/1/2/3/4) and a multistage orifice plate (P0LAB12BP001/2/3/4/5). The flow transmitter (P0LAB12CF101/2/3/4/5) connected across the flow nozzle measures the flow and is used for flow control purpose. The minimum FCV regulates the required minimum flow that is sufficient to prevent overheating and flashing. The recirculation lines from the three (3) Nos. of TBFPs and the two (2) MBFPs are connected to a common header (P0LAB12BR035) near the Deaerator. O & M Manual

System Description

SD-01



Rev. A

All the individual lines are provided with manual operated valves (P0LAB12AA016/017/018/019/020) at the inlet to the common header. From this common header the recirculation lines are further connected to the three (3) deaerators through respective manual operated valves (P0LAB12AA021/022/023). P u m p W a r m u p F l o w P a th

Each pump is provided with a warm up system for quick and safe startup. A pipe line at the outlet of the booster pump is used for supplying warming up water to the pumps (including HHP BFWPs and HP BFWPs) while pump is not in service. This is achieved by forming a common warm up header connecting the discharge of all the booster pumps and then distributing water to the pumps while it is not in service. The flow path of this warm up line is identical for all the BFPs. The discharge of the booster pump is connected to the common warm up header (P0LAB11BR034) through a manual operated valve (P0LAB11AA014/018/022/026/030) and a check valve (P0LAB11AA015/019/023/027/031). For operation flexibility the header (P0LAB11BR034) is divided into two (2) sections by a manual operated gate valve (P0LAB11A048). Both the M-BFPs and T-BFP A are connected to one section of this header and the other two (2) TBFPs to the second section. The first section of the header connected to M-BFP is provided with a vent line with a manually operated valve (P0LAB11AA931). The outlet of the vent line is led to atmosphere through a drain funnel. The warm up water for the respective pump is drawn this header (P0LAB11BR034) through a manual operated valve (P0LAB11AA016/020/024/028/032), flow orifice (P0LAB11BP001/2/3/4/5) and a check valve (P0LAB11AA017/021/025/029/033) as shown in Figure 2-5. The water leaves the check valve, enters the BFP casing and flows back to the deaerator through the BP suction line. The desired flow is maintained by the restricted orifice. Intermed iate Stage Feed W ater Flow Path

BFPs also feed water to various temperature control stations. Feed water is tapped off from a low pressure (intermediate) stage of each BFP and connected to a common discharge header (P0LAB01BR006) through a stop check valve (P0LAB01AA001/3/5/7/9) and a MOV (P0LAB01AA002/4/6/8/10). A vent line is provided with two (2) manual operated valves (P0LAB01AA950-951/952-953/954-955/956957/958/959) connected in cascade before the stop check valve. The outlet of the vent line is led to atmosphere through a drain funnel.

O & M Manual

System Description

SD-01



Rev. A

A drain line is provided with two (2) manual operated valves (P0LAB01AA936-937/938-939/940-941/942-943/944/945) connected in cascade after the stop check valve. The outlet of the drain line is led to atmosphere through a drain funnel. A pressure indicator (P0LAB81CP301/2/3/4/5) is mounted at the pump outlet for local monitoring purpose. The header supplies water to the various temperature control stations via individual manual operated valves i.e. to turbine bypass system and MP extraction steam DSH spray stations (T1-T5MAN11AA001), LP auxiliary steam DSH spray (P0LAE12AA007), burner atomizing steam DSH spray (P0LAE13AA007), MP/LP steam DSH spray (P0LAB81AA013), MP pressure reduction stations (P0LAB81AA012), HHP & HP pressure reduction stations (P0LAB81AA011) and HP steam DSH spray station (P0LAE13AA001) .

O & M Manual

System Description

SD-01


2.2.3


Rev. A

HHP Boiler Feed Water Pump The flow path of this system is classified into the following subgroups. •

Feed water flow path

•


•

Pump warm up flow path

Feed W ater Flow Path

There are three (3) motor driven HHP BFWPs, each having 100% capacities. The feed water flow path is identical for each pump. Figure 2-8 & 2-9 show the HHP BFWP system. Individual suction lines (P0NAB03BR005/6/7), from the deaerator outlet header (P0LAB11BR004/18) feed water to the three (3) HHP BFWPs in the system. For proper initial charging of the suction lines, a vent line with a manual operated valve (P0NAB03AA900/2/4) is provided at the inlet of each pump. The outlet of t he vent valve is led to atmosphere through a drain funnel. Feed water flow to the suction of HHP BFWP through a manual operated valve (P0NAB03AA004/5/6) and a suction strainer (P0NAB03AT001/2/3). The open position of the valve is indicated in the CCR1/LCR and interlocked with pump operation. A DP indicating transmitter (P0NAB03CP501/2/3) connected across the strainer indicates the condition of the strainer element. For maintenance purpose of the strainer, a drain line is led from strainer bottom through a drain funnel to atmosphere with a manual operated valve (P0NAB03AA901/3/5). A pressure indicator (P0 NAB03CP301/2/3) is fitted at the pump inlet for measuring the suction pressure. A relief valve (P0NAB03AA100/1/2) at the inlet of the pump relieves any excess pressure on the pump suction line. The outlet of the relief valve is led to atmosphere through a drain funnel. The HHP BFWPs discharge the feed water through a flow nozzle (P0NAB03CF001/2/3), a stop check valve (P0NAB03AA007/9/11) and a MOV (P0NAB03AA008/10/12) connected in cascade. The flow transmitter (P0NAB03CF101/2/3) connected across the flow nozzle measures the flow and controls the operation of the recirculation CV (P0NAB03AA700/1/2). A drain line with two (2) manual operated valves (P0NAB03AA906-907/908-909/910-911) is provided between the stop check valve and the MOV. The outlet of the drain valve is led to atmosphere through a drain funnel.

O & M Manual

System Description

SD-01



Rev. A

The pump discharge pressure is indicated in the local by a pressure indicator (P0NAB03CP305/6/7). For CCR1/LCR indication, a pressure indicating transmitter (P0NAB03CP101/2/3) is fitted after the flow nozzle. Flow from all the three (3) pumps connects to a common discharge header (P0NAB03BR011). This header feeds water to the Partner outlet terminal and is provided with a flow nozzle (P0NAB03CF051). Two (2) flow transmitters (P0NAB03CF151/152) are connected across flow nozzle. A pressure indicating transmitter (P0NAB03CP104) at the inlet of the flow nozzle is used for pressure indication in the CCR1. For checking the quality of the water a sampling line is provided before the flow nozzle and connected to the sampling station (S8) with two (2) manual operated valves (P0QUA01AA016/009). For metering purpose, two (2) pressure transmitters (P0NAB03CP151/2) and two (2) temperature elements (P0NAB03CT051/2) are fitted at the outlet side of the flow nozzle. At the outlet of the metering station a manual operated valve (P0NAB03AA022) maintains the flow to the Partner terminal. P u m p M i n i m u m F l o w R e c i r c u l a ti o n

During the BFWP startup and low flow operation, the feed water requirement is less than the minimum design flow of the pump. To prevent the pump from overheating and cavitation damage, each of the three (3) HHP BFWPs has an individual minimum flow recirculation line. The pump minimum flow recirculation line routes the feed water to the deaerators (P0LAA01BB101, 102&103) from a point downstream of the pump discharge flow nozzle. Each recirculation line has the identical flow path. The pump minimum flow recirculation line returns the feed water to the deaerator tank via, a piston valve (P0NAB03AA700/1/2) and a multistage orifice plate (P0NAB03BP001/2/3). The piston valve regulates the required minimum flow that is sufficient to prevent overheating and flashing. The recirculation lines from the three (3) nos. of HHP BFWPs are connected to a common header (P0LAB12BR035) near the deaerators. The HHP BFWP (A/B/C) recirculation lines are provided with manual operated valves (P0NAB03AA019/020/021). From this common header the recirculation lines are connected to the three (3) deaerators through respective manual operated valves (P0LAB12AA021/022/023).

O & M Manual

System Description

SD-01



Rev. A

P u m p W a r m u p F l o w P a th

Each pump is provided with a warm up system for quick startup of the stand by pump. The warm up water for each pump is supplied by the warm up header (discharge of the BFP-BPs) as discussed in the BFP flow path. The flow path is identical for all the pumps. From the header (P0LAB11BR034) three (3) independent lines with a manual operated valve (P0NAB03AA042/44/46), a flow orifice (P0NAB03BP010/11/12) and a check valve (P0NAB03AA043/45/47) discharges the warm water to the individual pumps while it is not in service. The water is returned to the deaerator through the pump casing and the suction line.

O & M Manual

System Description

SD-01


2.2.4


Rev. A

HP Boiler Feed Water Pump The flow path of this system is classified into the following sub groups: •

Feed water flow path

•


•

Pump warm flow path

Feed W ater Flow Path

There are four (4) motor driven HP BFWPs, each having 50% capacities. The feed water flow path is identical for each pump. Figures 2-10 to 212 show the HP BFWP system. Individual suction lines (P0NAB02BR005/6/7/55), from the deaerator outlet header (P0LAB11BR004/18) feed water to the four (4) HP BFWPs in the system. For proper initial charging of the suction lines, a vent line with a manual operated valve (P0NAB02AA900/2/4/12) is provided at the inlet of each pump. The outlet of t he vent valve is led to atmosphere through a drain funnel. Feed water passes to the suction of HP BFWP through a manual operated valve (P0 NAB02AA004/5/6/33) and a suction strainer (P0NAB02AT001/2/3/4). The open position of the valve is indicated in the CCR1/LCR and interlocked with pump operation. A DP indicating transmitter (P0NAB02CP501/2/3/4) connected across the strainer indicates the condition of the strainer element. For maintenance purpose of the strainer, a drain line is led from strainer bottom through a drain funnel to atmosphere with a manual operated valve (P0NAB02AA901/3/5/17). A pressure indicator (P0 NAB02CP301/2/3/4) is fitted at the pump inlet for measuring the suction pressure. A relief valve (P0NAB02AA100/1/2/3) at the inlet of the pump relieves any excess pressure on the pump suction line. The outlet of the relief valve is led to atmosphere through a drain funnel. The HP BFWPs discharge the feed water through a flow nozzle (P0NAB02CF001/2/3/4), a stop check valve (P0NAB02AA007/9/11/34) and a MOV (P0NAB02AA008/10/12/35) connected in cascade. The flow transmitter (P0NAB02CF101/2/3/4) connected across the flow nozzle measures the flow and controls the operation of the recirculation CV (P0NAB02AA700/1/2/3). A drain line with two (2) manual operated valves (P0NAB02AA906-907/908-909/910-911/914915) is provided between the stop check valve and the MOV. The outlet of the drain valve is led to atmosphere through a drain funnel.

O & M Manual

System Description

SD-01



Rev. A

The pump discharge pressure is indicated in the local by a pressure indicator (P0NAB02CP305/6/7/8). For CCR1/LCR indication, a pressure indicating transmitter (P0NAB02CP101/2/3/4) is fitted after the flow nozzle. Flow from all the four (4) pumps connects to a common discharge header (P0NAB02BR011). This header feeds water to the Partner outlet terminal and is provided with a flow nozzle (P0NAB02CF051). Two (2) flow transmitters (P0NAB02CF151/152) are connected across flow nozzle. A pressure indicating transmitter (P0NAB02CP105) at the inlet of the flow nozzle is used for pressure indication in the CCR1. For metering purpose, two (2) pressure transmitters (P0NAB02CP151/2) and two (2) temperature elements (P0NAB02CT051/2) are fitted at the outlet side of the flow nozzle. At the outlet of the metering station a manual operated valve (P0NAB02AA039) maintains the flow to the Partner terminal. P u m p M i n i m u m F l o w R e c i r c u l at i o n

During the BFWP startup and low flow operation, the feed water requirement is less than the minimum design flow of the pump. To prevent the pump from overheating and cavitation damage, each of the four (4) HP BFWPs has an individual minimum flow recirculation line .The pump minimum flow recirculation line routes the feed water to the deaerators (P0LAA01BB101, 102&103) from a point downstream of the pump discharge flow nozzle. Each recirculation line has the identical flow path. The pump minimum flow recirculation line returns the feed water to the deaerator via, a piston valve (P0NAB02AA700/1/2/3) and a multistage orifice plate (P0NAB02BP001/2/3/7). The piston valve regulates the required pump minimum flow that is sufficient to prevent overheating and flashing. The recirculation lines from the four (4) nos. of HP BFWPs are connected to a common header (P0LAB12BR035) near the deaerator. The HP BFWP (A/B/C/D) recirculation lines are provided with isolation valves (P0NAB02AA019/020/021/22). From this common header the recirculation lines are connected to the three (3) deaerators through respective isolation valves (P0LAB12AA021/022/023).

O & M Manual

System Description

SD-01



Rev. A

P u m p W a r m u p F l o w P at h

Each pump is provided with a warm up system for quick startup of the stand by pump. The warm up water for each pump is supplied by the warm up header (discharge of the BFP-BPs) as discussed in the BFP flow path. The flow path is identical for all the pumps. From the header (P0LAB11BR034) four independent lines with a manual operated valve (P0NAB03AA034/36/38/40), a flow orifice (P0NAB03BP006/7/8/9) and a check valve (P0NAB03AA035/37/39/41) discharges the warm water to the individual pumps while it is not in service. The water is returned to the deaerator through the pump casing and the suction line.

O & M Manual

System Description

SD-01


2.2.5


Rev. A

HP Feed Water Heater Figures 2-13 to 2-16 show the HP heater system flow path. Feed W ater Flow Path

From the common BFP discharge header (P0LAB12BR006) three (3) independent lines supply water to three (3) independent streams of HP 1&2 heaters ”A/B/C” (P0LAD01AC101/102/103 and P0LAD02AC101/ 102/103) which are cascaded. The HP heaters can be bypassed by opening the MOV (P0LAB41AA009).The scheme is identical for all the streams of HP heaters. The valve position can be monitored in the CCR1/LCR with the limit switches provided in the valve. The flow path of HP1 and HP2 heaters are as detailed below. HP1 Heater A/B/C At the inlet of HP1 heater A/B/C (P0LAD01AC101/102/103), a manual operated valve (P0LAB12AA031/033/035) and a MOV (P0LAB12AA032/034/036) are provided in cascade. Position switches are provided on the valve for monitoring and interlocking. A drain line with two (2) manual operated valves (P0LAB12AA910-911/914915/918-919) is provided in between the two (2) inlet valves. The outlet of the drain pipe is led to atmosphere trough a drain funnel. A temperature element (P0LAB12CT001/2/3) at the inlet of the heaters measures the water temperature. The outlet of HP1 heater (P0LAD01AC101/2/3) is directly connected to the inlet of the HP2 heater (P0LAD02AC101/2/3). Another set of drain valves (P0LAB12AA912-913/916-917/920-921) and vent valves (P0LAB12AA900-901/904-905/908-909) are provided at the inlet and outlet of each heater stream for draining and filling purposes. The outlet of the drain and vent pipe are led to atmosphere trough a drain funnel. For relieving any excessive pressure on the water side a relief valve (P0LAD01AA160/162/164) is fitted on the tube side of the HP1 heater. The relief valve out let is led to atmosphere through a drain funnel. HP2 Heater A/B/C HP2 heater is located upstream of HP1 heater. The outlet of the HP1 heater is directly connected to the inlet of the HP2 heater. A set of drain valves (P0LAB41AA902-903/906-907/910-911) and vent valves (P0LAB41AA900-901/902-903/904-905) are provided at the inlet and outlet of each heater for draining and filling purposes. The outlet of the drain and vent pipe are led to atmosphere trough a drain funnel. A MOV (P0LAB41AA001/4/7) and a manual operated valve (P0LAB41AA002/5/8) connected in cascade is provided at the outlet of HP2 heater. O & M Manual

System Description

SD-01



Rev. A

Position switches are provided on the valve for monitoring and interlocking. A drain line with two (2) manual operated valves (P0LAB41AA910-911/914-915/918-919) is provided in between the two (2) outlet valves. The outlet of the drain pipe is led to atmosphere trough a drain funnel. A temperature element at the inlet (P0LAB21CT001/2/3) and outlet (P0LAB41CT001/2/3) of the heater measures and controls the water temperature. The outlets of the three (3) streams of HP heaters are connected to a common boiler Feed Water supply header (P0LAB41BR007). From the header individual lines supply Feedwater to the respective boilers through manual operated valves (B1-B9LAB41AA017). For relieving any excessive pressure on the water side a relief valve (P0LAD02AA160/162/164) is fitted on the tube side of the HP2 heater. The relief valve out let is led to atmosphere through a drain funnel. Note:

Two (2) numbers of manual operated valves (P0LAB41AA015/016) are provided in the headers which are normally kept open. These valves are provided for construction and commissioning of the system in phases.

Heating Steam flow p ath

The heating steam for the HP1 & 2 heaters is supplied by the HP/MP steam headers respectively as described in the following paragraphs. HP1 Heater A/B/C The steam for HP1 Heater (P0LAD01AC101/102/103) is drawn from the MP steam header (P0LBQ02BR009). The flow path is identical for all the streams. The HP1 heater is provided with an inlet steam MOV (P0LBQ02AA008/012/016) for isolation purpose. For indication and interlock purpose position limit switches are fitted on the MOV. A pneumatically operated PCV (P0LBQ02AA704/705/706) which is provided with a manual operated valve both at the inlet (P0LBQ02AA009/013/017) and outlet (P0LBQ02AA010/014/018) controls the feed water temperature. These isolating valves ensure perfect isolation of heaters. A manual operated needle valve (P0LBQ02AA011/015/019) is provided as a bypass to the set of isolating and PCVs. A drain line with a manual operated valve (P0LBQ02AA902/903/904) is provided at the inlet of the PCV for maintenance purposes. The outlet of the line is normally closed with a screw plug.

O & M Manual

System Description

SD-01



Rev. A

There are two (2) air vent lines one on the drain cooling zone and another at the condensing zone of the heater. The air vent line on the condensing zone side of the heater is connected to the deaerator through an orifice (P0LAD01BP600/601/602). The orifice is fitted with a manual operated valve (P0LAD01AA645/647/649) at the inlet and a check valve (P0LAD01AA910/911/912) cascaded with a manual operated valve (P0LAD01AA900/901/902) at the outlet. A bypass line is provided with a manual operated valve (P0LAD01AA646/648/650). The three (3) vent lines from the HP1 (A/B/C) heaters, provided with individual manual operated isolation valves (P0LAD01AA906/907/908), are connected to the deaerator through a common line. The vent line on the cooling zone side of the heater is connected to the deaerator through an orifice (P0LAD01BP603/604/605). The orifice is fitted with a manual operated valve (P0LAD01AA651/652/653) at the inlet and connected to the inlet side of the manual operated valve (P0LCH01AA002/012/021) in the condensate drain system to deaerator through a check valve (P0LAD01AA913/914/915). For proper charging of the heaters a steam side drain is provided with a manual operated valve (P0LAD01AA601/616/631) and led to atmosphere through a drain funnel. While the heaters are in service, steam condenses and is collected on the shell side. This condensate is to be drained and a definite water level is to be maintained for the optimum performance of the heater. The water level is controlled using three (3) sets of LCVs, called normal drain, emergency drain and startup drain. A level indicator (P0LAD01CL301/2/3) and two (2) level transmitters (P0LAD01CL1012/103-4/105-6) are mounted on the dished end side of the heater for monitoring and controlling the level. The level measuring instruments can be maintained with the help of root valves and drain valves fitted on these instruments. Three (3) separate lines are drawn from the bottom drain nozzle of the heater for the emergency drain, normal drain and startup drain level control stations. The check valves in the emergency (P0LCH01AA040/41/42) and normal (P0LCH01AA031/34/37) drain lines prevents reverse flow from deaerator to HP1 heater through the two (2) sections of drain control stations. It also maintains condensate in the piping and helps in smooth commissioning of heater. For monitoring the temperature of the condensate, a temperature element (P0LCH01CT001/2/3) is fitted in the common section of the drain line connected to drain stations. The emergency drain line consists of manual operated valves both at the inlet (P0LCH01AA005/14/23) and outlet (P0LCH01AA006/15/24) of a pneumatically operated LCV (P0LCH01AA701/3/5) fitted after the check valve (P0LCH01AA040). O & M Manual

System Description

SD-01



Rev. A

An orifice (P0LCH01BP001/2/3) cascaded with a manual operated valve (P0LCH01AA043/44/45) is connected across the LCV for warm up purpose. A drain valve (P0LCH01AA902/5/8) is provided at the inlet of the LCV and its outlet is closed with a screw plug. Another drain valve (P0LCH01AA900/903/906) is provided at the outlet of the check valve and its outlet is led to atmosphere through a drain funnel. The outlet of the control station is connected to the deaerator. Under high level conditions this drain can be operated. The normal drain station is provided with manual operated valves both at the inlet (P0LCH01AA001/11/20) and the outlet (P0LCH01AA002/12/21) of a pneumatically operated LCV (P0LCH01AA700/702/704). The outlet of the drain level control station is connected to the deaerator. A drain line at the inlet of the LCV is provided with a manual operated valve (P0LCH01AA901/904/907). The outlet of the line is normally closed with a screw plug. The startup drain station is provided with manual operated valves both at the inlet (P0LCH01AA032/35/38) and the outlet (P0LCH01AA033/036/039) of a pneumatically operated LCV (P0LCH01AA706/707/708). The outlet of the startup drain level control station is connected to the blow tank. A drain line at the inlet of the LCV is provided with a manual operated valve (P0LCH01AA909/9010/911). The outlet of the line is normally closed with a screw plug. For relieving any excessive pressure on the steam side a relief valve (P0LAD01AA160/162/164) is fitted on the shell side of the HP1 heater. The relief valve outlet is led to atmosphere through the common pipe connecting respective HP2 Heater (A/B/C) relief valve and the exhaust steam pipe from respective BFPT (A/B/C). A drain funnel provided in the line enables drainage of heavy water particles. A pressure indicator (P0LAD01CP301/2/3) is fitted on the steam side. During long term shut down, the heaters are preserved with nitrogen gas blanketing. For this purpose nitrogen gas is supplied to the heaters from the nitrogen gas seal system. A separate line is drawn from this station to individual heaters and connected to the heater through a check valve (P0QJA01AA017/019/21) and a manual operated valve (P0QJA01AA018/020/022). The outlet of the valve is connected to the vent line on the condensing zone side of the heater. HP2 Heater A/B/C The heating steam for HP2 heater (P0LAD02AC101/102/103) is drawn from the HP steam header (P0LBQ03BR010). The flow path is identical for all the streams. The HP2 heater is provided with an inlet MOV (P0LBQ03AA010/19/25) for isolation purpose. For indication and interlock purpose position limit switches are fitted on the MOV. O & M Manual

System Description

SD-01



Rev. A

A pneumatically operated PCV (P0LBQ03AA704/705/706) which is provided with two (2) manual operated valves both at the inlet (P0LBQ03AA014-015/020-021/026-027) and outlet (P0LBQ03AA016017/022-023/028-029) controls the feed water temperature. These isolating valves ensure perfect isolation of heaters. A manual operated needle valve (P0LBQ03AA018/024/030) is provided as a bypass to the set of isolating and PCVs. A drain line with two (2) manual operated valves is provided at the inlet (P0LBQ03AA906-7/908-9/910-11) and outlet (P0LBQ03AA915-16/917-17/919-20) of the PCV for maintenance purposes. The outlet of the line is led to atmosphere through a drain funnel. This arrangement helps maintenance of the PCV on line safely. There are two (2) air vent lines one near the cooling zone and another at the condensing zone of the heater. The air vent line on the condensing zone of the heater is connected to the deaerator through an orifice (P0LAD02BP600/601/602). The orifice is fitted with a manual operated valve (P0LAD02AA690/692/694) at the inlet and a check valve (P0LAD02AA906/907/908) cascaded with a manual operated valve (P0LAD02AA900/901/902) at the outlet. A bypass line is provided with a manual operated valve (P0LAD02AA691/693/695). The three (3) vent lines from the HP2 (A/B/C) heaters, provided with individual manual operated isolation valves (P0LAD02AA903/904/905), are connected to the deaerator through a common line. The vent line on the cooling zone of the heater is connected to the deaerator through an orifice (P0LAD02BP603/604/605). The orifice is fitted with a manual operated valve (P0LAD02AA678/679/680) at the inlet and connected to the inlet side of the manual operated valve (P0LCH02AA002/014/026) connected to HP1 heater shell through a check valve (P0LAD02AA909/910/911). For proper charging of the heaters a steam side drain is provided with two (2) manual operated valves (P0LAD02AA602-3/632-3/662-3) connected in cascade and led to atmosphere through a drain funnel. While the heaters are in service, steam condenses and is collected on the shell side. This condensate is to be drained and a definite water level is to be maintained for the optimum performance of the heater. The water level is controlled using two (2) sets of LCVs, called normal drain and emergency drain. A level indicator (P0LAD02CL301/2/3) and two (2) level transmitters (P0LAD02CL101-2/103-4/105-6) are mounted on the condensing zone of the heater for monitoring and controlling the level. The level measuring instruments can be maintained with the help of root valves and drain valves fitted on these instruments.

O & M Manual

System Description

SD-01



Rev. A

Two (2) separate lines are drawn from the bottom side of the heater for the emergency drain and normal drain level control stations. One (1) check valve (P0LCH02AA035/036/037) in these lines isolates the drain emergency control station from the heater under shut down conditions. It thus maintains condensate in the piping and helps in smooth commissioning of heater. The emergency drain line consists of manual operated valves both at the inlet (P0LCH02AA005/18/30) and outlet (P0LCH02AA007/19/31) of a pneumatically operated LCV (P0LCH02AA701/3/5) fitted after the check valve (P0LCH02AA035/36/37). An orifice (P0LCH02BP001/2/3) cascaded with a manual operated valve (P0LCH02AA038/39/40) is connected across the LCV for warm up purpose. Two (2) drain valves (P0LCH02AA904-5/910-11/916-17) are provided at the inlet of the LCV and its outlet is closed with a screw plug. Another drain valve (P0LCH02AA900-1/906-7/912-13) is provided at the outlet of the check valve and its outlet is led to atmosphere through a drain funnel. Under high level conditions this drain can be operated. For monitoring the temperature of the condensate, a temperature element (P0LCH02CT001/2/3) is fitted in the line connected to normally operated drain station. This drain station is provided with a manual operated valve both at the inlet (P0LCH02AA001/13/25) and the outlet (P0LCH02AA002/14/26) of a pneumatically operated LCV (P0LCH02AA700/702/704). A drain line at the inlet of the LCV is provided with two (2) manual operated valves (P0LCH02AA902-3/9089/914-15). The outlet of the line is normally closed with a screw plug. For relieving any excessive pressure on the steam side a relief valve (P0LAD02AA161/163/165) is fitted on the shell side of the HP2 heater. The relief valve outlet is led to atmosphere through the common pipe connecting respective HP1 Heater (A/B/C) relief valve and the exhaust steam pipe from respective BFPT (A/B/C). A drain funnel provided in the line enables drainage of heavy water particles. A pressure indicator (P0LAD02CP301/2/3) is fitted on the steam side. During long term shut down, the heaters are preserved with nitrogen gas blanketing. For this purpose nitrogen gas is supplied to the heaters from the nitrogen gas seal system. A separate line is drawn from this station to individual heaters and connected to the heater through a check valve (P0QJA01AA011/013/15) and a manual operated valve (P0QJA01AA012/014/016). The outlet of the valve is connected to the vent line on the condensing zone.

O & M Manual

System Description

SD-01


2.2.6


Rev. A

Cooling, Mechanical Sealing & Lubrication of Boiler Feed Pump / Booster Pump MBFP and MBFP-BP Figure 2-17 shows the cooling water, mechanical sealing water and lubrication oil flow paths of MBFPs.The coolers in the MBFPs are given below. •

MBFP motor cooler

•

MBFP lube oil cooler

•

MBFP seal box coolers

•

MBFP mechanical seal flushing water coolers

•

MBFP-BP seal box coolers

•

MBFP-BP mechanical seal flushing water cooler

The cooling water for the various coolers of the MBFP and MBFP-BP is supplied by the auxiliary cooling water system. The cooling water flow path for each cooler is the same. Cooling water is distributed to the different coolers in the pump system through separate isolation valves and flow restricted orifices. Each cooler flow is monitored though the individual sight flow indicators. Another manual operated valve is provided at the outlet of the sight glass. The hot water from the individual pump cooler flows back to the cooling tower bay. Each cooler outlet is fitted with temperature indicator for monitoring the performance of the cooler. Seal water flows in a closed path through the mechanical seal and the mechanical seal flushing water cooler. At the outlet of the cooler a set of magnet filters is provided to remove any magnetic particles collected in the seal water. A temperature indicator is provided in the seal water return line for monitoring the seal water temperature. The seal water is cooled by the auxiliary cooling water. The lube oil system provided for MBFP supplies lubrication oil for the bearings of booster pump, main feed pump, motor, and the speed up gear. The system consists of two (2) motor driven lube oil pumps mounted on the top of the oil tank, an oil cooler, a duplex filter, a pressure control valve and necessary instrumentation required for monitoring and operation of the pumps. For more details of cooling water supply and return system, refer to Auxiliary Cooling Water System description SD-21.

O & M Manual

System Description

SD-01



Rev. A

TBFP and TBFP-BP Figures 2-18 shows the cooling water, mechanical sealing water and lubrication oil flow paths of TBFP and the booster pump. •

TBFP lube oil cooler

•

TBFP seal box coolers

•

TBFP mechanical seal flushing water coolers

•

TBFP-BP seal box coolers

•

TBFP-BP mechanical seal flushing water cooler

The cooling water for the various coolers of the TBFP and BFP-BP is supplied by the auxiliary cooling water system. The cooling water flow path for each cooler is the same. Cooling water is distributed to the different coolers in the pump system through separate isolation valves and flow restricted orifices. Each cooler flow is monitored though the individual sight flow indicators. Another manual operated valve is provided at the outlet of the sight glass. The hot water from the individual pump cooler flows back to the cooling tower bay. Each cooler outlet is fitted with temperature indicator for monitoring the performance of the cooler. For more details refer to vendor’s manual. Seal water flows in a closed path through the mechanical seal and the mechanical seal flushing water cooler. At the outlet of the cooler a set of magnet filters is provided to remove any magnetic particles collected in the seal water. A temperature indicator is provided in the seal water return line for monitoring the seal water temperature. The seal water is cooled by the auxiliary cooling water. The lube oil system provided for TBFP supplies lubrication oil for the bearings of booster pump and main pump. The lube oil is supplied by the BFP turbine control and lube oil system. For more details on the oil supply system refer to “Boiler Feed Pump Turbine (BFPT) System” SD-12. The system consists of a supply network of pipe lines and necessary instrumentation for monitoring the system performance. To pump back the booster pump bearing drain oil to the BFPT oil tank, an oil return unit with two (2) oil return pumps mounted on the tank is provided. The outlet of the oil return unit is connected back to the return oil header of the TBFP. For more details of cooling water supply and return system, refer to Auxiliary Cooling Water System description SD-21.

O & M Manual

System Description

SD-01


2.2.7


Rev. A

Cooling, Mechanical Sealing & Lubrication of HHP/ HP Boiler Feed Water Pump HHP BFWP Figure 2-19 shows the auxiliary cooling water flow through HHP BFW pump coolers, flow path of seal water and lubricating oil of the HHP BFWP. The coolers in the HHP BFWPs are given below. •

HHP BFWP lube oil cooler

•

HHP BFWP seal box coolers

•

HHP BFWP mechanical seal flushing water coolers

The cooling water for the HHP BFWP coolers is supplied by the Auxiliary Cooling Water System. Cooling water is distributed to the different coolers in the pump (Seal box, mechanical seal, and lube oil coolers) through separate isolation valves and flow restricted orifices. Cold water enters the respective cooler as given above through a manual operated valve and leaves the cooler through a sight glass. Cooling water flow can be monitored, looking into the sight glass. Another manual operated valve is provided at the outlet of the sight glass. The hot water from the individual pump cooler flows back to the cooling tower bay. Each cooler outlet is fitted with temperature indicator for monitoring the performance of the cooler. Seal water flows in a closed path through the mechanical seal and the mechanical seal flushing water cooler. At the outlet of the cooler a magnet filter is provided to remove any magnetic particles collected in the seal water. A bypass valve is also provided for the filter. The seal water is cooled by the auxiliary cooling water. The lube oil system provided for HHP BFWP supplies lubrication oil for the bearings of main feed pumps and motor. The system consists of two (2) motor driven lube oil pumps mounted on the top of the oil tank, an oil cooler, a duplex filter, a pressure control valve and necessary instrumentation required for monitoring and operation of the pumps. For more details of cooling water supply and return system, refer to Auxiliary Cooling Water System description SD-21.

O & M Manual

System Description

SD-01



Rev. A

HP BFWP The Figure 2-20 shows the flow path of lubricating oil, seal water and cooling water of the HP BFWP. The coolers in the HP BFWPs are given below. •

HP BFWP lube oil cooler

•

HP BFWP seal box coolers

•

HP BFWP mechanical seal flushing water coolers

The cooling water for the HP BFWP coolers is supplied by the Auxiliary Cooling Water System. Cooling water is distributed to the different coolers in the pump (Seal box, mechanical seal, and lube oil coolers) through separate isolation valves and flow restricted orifices. Cold water enters the respective cooler as given above through a manual operated valve and leaves the cooler through a sight glass. Cooling water flow can be monitored, looking into the sight glass. Another manual operated valve is provided at the outlet of the sight glass. The hot water from the individual pump cooler flows back to the cooling tower bay. Each cooler outlet is fitted with temperature indicator for monitoring the performance of the cooler. Seal water flows in a closed path through the mechanical seal and the mechanical seal flushing water cooler. At the outlet of the cooler a magnet filter is provided to remove any magnetic particles collected in the seal water. A bypass valve is also provided for the filter. The seal water is cooled by the auxiliary cooling water. The lube oil system provided for HP BFWP supplies lubrication oil for the bearings of main feed pump and motor. The system consists of two (2) motor driven lube oil pumps mounted on the top of the oil tank, an oil cooler, a duplex filter, a pressure control valve and necessary instrumentation required for monitoring and operation of the pumps. For more details of cooling water supply and return system, refer to Auxiliary Cooling Water System description SD-21.

O & M Manual

System Description

SD-01



P0LAB12BR043 A 1 0 6 G rC 22B x S160

FEED WATER F R O M T - B F P A & M -B F P A

FEED WATER

P0LAB53BR001 A 1 0 6 G rC

6B

x S160

T O B O I L E R IN L E T

P0LAB12BR816 1B 1B

P0LAB12BR822 1B 1B

P0LAB12 CP106 P IT

P0LAB12 CP107 P IT

P0LAB12BR922

B 1

FEED WATER

P0LAB12BR007 A 1 0 6 G rC 22B x S160

B 1 3 2 9 R B 2 1 B A L 0 P

2 1 B 2 A 2 L 9 0 A P A 2 1 B 3 A 2 L 9 0 A P A

0 . 7 6 t x B 8 6 2 0 0 R B 2 C 1 r B G A 6 L 0 0 1 P A P0LAB12BR044 A 1 0 6 G rC 22B x S160

TO HP1 HTR A

FEED WATER

FEED WATER F R O M T - B F P B & M -B F P B

P0LAB12BR008 A 1 0 6 G rC 22B x S160

TO HP1 HTR B P0LAB12BR003 A 1 0 6 G rC 16B xS160

FEED WATER FROM T-BFP C

FEED WATER TO HP1 HTR C

MRD-3-1399

P0LAB12BR009 A 1 0 6 G rC 22B

S160

Rev. A



P0LAB12BR043 A 1 0 6 G rC 22B x S160

Rev. A

FEED WATER F R O M T - B F P A & M -B F P A

FEED WATER

P0LAB53BR001 A 1 0 6 G rC

6B

x S160

T O B O I L E R IN L E T

P0LAB12BR816 1B 1B

P0LAB12BR822 1B 1B

P0LAB12 CP106 P IT

P0LAB12 CP107 P IT

P0LAB12BR922

B 1

FEED WATER

P0LAB12BR007 A 1 0 6 G rC 22B x S160

B 1 3 2 9 R B 2 1 B A L 0 P

2 1 B 2 2 A 9 L 0 A P A 2 1 B 3 A 2 L 9 0 A P A

0 . 7 6 t

x B 6 8 0 2 0 R B 2 r 1 C B G A 6 L 0 0 1 P A P0LAB12BR044 A 1 0 6 G rC 22B x S160

TO HP1 HTR A

FEED WATER

FEED WATER F R O M T - B F P B & M -B F P B

P0LAB12BR008 A 1 0 6 G rC 22B x S160

TO HP1 HTR B P0LAB12BR003 A 1 0 6 G rC 16B xS160

FEED WATER FROM T-BFP C

FEED WATER

P0LAB12BR009 A 1 0 6 G rC 22B

S160

TO HP1 HTR C

MRD-3-1399

FIGURE 2-4 O & M Manual Mitsubishi Heavy Industries, Ltd.

BOILER FEED WATER PUMP P & ID (4 OF 7) System Description

SD-01

Page 30 of 83



Rev.A

FOR METERING

HHP BFW TO PARTNER

P0NAB03BR037

6 2 9 R B 3 0 B A N 0 3 P 0 B 7 1 B A 9 1 N 0 A P A 5 3 2 0 9 B 6 R B A 1 B 1 N 9 3 0 A 0 A B R P A A N 0 12B P

P0NAB03BR008 A106GrC 12B x S160

P0NAB03 FT CF152 P0NAB03 CP152 PT P0NAB03 P0NAB03 CT052 CT051 5 5 B TE TE 8 R 1 B 3 0 B A N B 0 1 P

P0NAB03 CP151 3 PT 5 B 8 1 R B 3 0 4 B 5 A 8 B 1 N R 0 B P 3 0 B A N B 0 1 P

FT B 1

B 1

1 5 8 R B 3 0 B A N 0 P

P0NAB03 CF151 B 1 0 5 8 B R 1 B 3 0 B A N 0 P B 1

2 5 8 R B 3 0 B A N 0 P

FW

P0NAB03 AA022

3 2 9 R B 3 B 0 1 B A N R 0 P D B 1 4 2 9 R B 3 0 B A N 0 P

7 5 8 R B 3 0 B A N 0 P

9 5 8 R B 3 B 0 1 B A N 0 P

B 1

P0NAB03 CF051 B 1

B 1

P0NAB03 B CF153 1 FT

B 1 P0NAB03 FT CF154

6 5 8 R B 3 0 B A N 0 P

8 5 8 R B 3 0 B A N 0 P

P0NAB03 CP104 PIT 8 1 8 R B B 1 3 0 B A B N 1 0 P

B 1 1 2 9 R B 3 0 B B A 1 N 0 R P A

FROM HHP BFWP A

2 2 9 R B 3 0 B A N 0 P

P0QUA01BR007 0.5B 0.5B FW A312GrTP316 0.5B x S10S P0QUA01 P0QUA01 AA009 AA016

FEED WATER


TO SAMPLING


FEED WATER FROM HHP BFWP B


FEED WATER FROM HHP BFWP C



Rev.A

FOR METERING

HHP BFW TO PARTNER

P0NAB03BR037

6 2 9 R B 3 0 B A N 0 P 3 0 B 7 1 B A 9 1 N 0 A P A 5 3 2 0 9 B 6 R B A 1 B 1 N 9 3 0 A 0 A B R P A A N 0 12B P


P0NAB03 FT CF152 P0NAB03 CP152 PT P0NAB03 P0NAB03 CT052 CT051 5 5 B TE TE 8 R 1 B 3 0 B A N 0 B P 1

P0NAB03 CP151 3 PT 5 B 8 1 R B 3 0 4 B 5 A 8 B N R 1 0 B P 3 0 B A N 0 B P 1

P0NAB03 CF151 B FT 1 B 1

B 1

1 5 8 R B 3 0 B A N 0 P

0 5 8 B R 1 B 3 0 B A N 0 P B 1

2 5 8 R B 3 0 B A N 0 P

FW

P0NAB03 AA022

3 2 9 R B 3 0 B 1 B A N R 0 P D B 1 4 2 9 R B 3 0 B A N 0 P

7 5 8 R B 3 0 B A N 0 P 9 5 8 R B 3 B 0 1 B A N 0 P

B 1

P0NAB03 CF051 B 1

B 1

P0NAB03 B CF153 1 FT

B 1 P0NAB03 FT CF154

6 5 8 R B 3 0 B A N 0 P

8 5 8 R B 3 0 B A N 0 P

P0NAB03 CP104 PIT 8 1 8 R B B 1 3 0 B A N B 0 1 P

B 1 1 2 9 R

B 3 0 B B A 1 N R 0 P A

P0QUA01BR007 0.5B 0.5B FW A312GrTP316 0.5B x S10S P0QUA01 P0QUA01 AA009 AA016

FEED WATER FROM HHP BFWP A

2 2 9 R B 3 0 B A N 0 P


TO SAMPLING


FEED WATER FROM HHP BFWP B


FEED WATER FROM HHP BFWP C

MRD-3-1404

O & M Manual Mitsubishi Heavy Industries, Ltd.

FIGURE 2-9

HHP BFW PUMP P & ID (2/2) System Description

SD-01

Page 35 of 83




Rev. A

FEED WATER FROM HP BFWP A

FOR METERING

HP BFW TO PARTNER

P0NAB02BR063

B 1 2 3 9 R B 2 0 B B 1 A N 0 P

3 3 9 R B 2 2 0 0 B 1 B A 2 A N 9 0 N 0 A P A P

P0NAB02 FT CF152 P0NAB02 CP152 PT

P0NAB02 P0NAB02 CT052 CT051 5 B TE TE 5 8 1 R B 2 0 B A B N 0 1 P

2 0 B 0 A 2 9 N 0 A P A

14B P0NAB02 AA039

0 3 9 R B B 2 0 1 B A N 0 P B 1 1 3 9 R B 2 0 B A N 0 P

2 0 B 8 A 1 9 N 0 A P A 2 0 B 9 A 1 9 N 0 A P A

P0NAB02 CP151 3 PT 5 8 B 1 R B 2 0 4 B 5 A 8 B 1 N R 0 B P 2 0 B A N 0 B P 1 7 5 8 R B 2 0 B A N 0 P 9 5 8 R B 2 0 B 1 B A N 0 P

FT

2 0 B 4 P0NAB02 2 A 5 5 8 CF151 B N 8 A 1 0 R P A B 2 0 0 5 B 8 B A 1 R N B 0 2 P 0 B A N 0 P B 1

B 1

1 5 8 R B 2 0 B A N 0 P

B 1

P0NAB02 CF051 B 1

B 1

B 1

6 5 8 R B 2 0 B A N 0 P P0NAB02 B 1 2 8 CF153 5 0 8 B 2 R FT A 7 8 B N 2 B 0 A 0 1 P A B P0NAB02 A N FT CF154 0 P

P0NAB02 CP105 PIT 8 1 8 B R B 1 2 0 B A B N 0 1 P

B 1 8 2 9 R B 2 0 B B A 1 N 0 P


9 2 9 R B 2 2 0 0 B 7 B A 1 A 9 N N 0 A 0 P A P 2 0 B 6 A 1 9 N 0 A P A

FEED WATER FROM HP BFWP B


0 8 S x 2 B 6 0 4 1 R B 2 r 0 C B G A 6 0 N 0 1 P A


FEED WATER FROM HP BFWP C


FEED WATER FROM HP BFWP D




Rev. A

FEED WATER FROM HP BFWP A

FOR METERING

HP BFW TO PARTNER

P0NAB02BR063

B 1 2 3 9 R B 2 0 B B 1 A N 0 P

3 3 9 R B 2 2 0 0 B 1 B A 2 A 9 N N 0 0 A P P A 2 0 B 0 A 2 9 N 0 A P A

P0NAB02 FT CF152 P0NAB02 CP152 PT

P0NAB02 P0NAB02 CT052 CT051 5 B TE TE 5 8 1 R B 2 0 B A B N 0 1 P

14B P0NAB02 AA039

0 3 9 R B B 2 1 0 B A N 0 P B 1 1 3 9 R B 2 0 B A N 0 P

2 0 B 8 A 1 9 N 0 A P A 2 0 B 9 A 1 9 N 0 A P A

P0NAB02 CP151 3 PT 5 B 8 1 R B 2 0 4 B 5 A 8 B 1 N R 0 B P 2 0 B A N 0 B P 1 7 5 8 R B 2 0 B A N 0 P 9 5 8 R B 2 B 0 1 B A N 0 P

P0NAB02 CF151 B FT 1 B 1

B 1

B 1

B 1

1 5 8 R B 2 0 B A N 0 P

0 5 8 B 1 R B 2 0 B A N 0 P B 1

2 0 B 4 2 A 5 5 8 N 8 0 A R P A B 2 0 B A N 0 P

6 P0NAB02 5 8 CF051 B R 1 B 2 0 B A N 0 P P0NAB02 B 2 8 CF153 1 0 5 8 B 2 R FT A 7 B 8 2 B N 0 A 0 1 P A B P0NAB02 A N FT CF154 0 P

P0NAB02 CP105 PIT 8 1 8 B R B 1 2 0 B A B N 0 1 P

B 1 8 2 9 R B 2 0 B B 1 A N 0 P


9 2 9 R B 2 2 0 0 B 7 B A 1 A N 9 0 N 0 A P P A 2 0 B 6 A 1 9 N 0 A P A

FEED WATER FROM HP BFWP B


0 8 S x 2 B 6 4 0 1 R B 2 C 0 r B G A 6 0 N 0 1 P A


FEED WATER FROM HP BFWP C


FEED WATER FROM HP BFWP D

FIGURE 2-12

MRD-3-1407

O & M Manual

HP BFW PUMP P & ID (3/3) System Description

Mitsubishi Heavy Industries, Ltd.


MRD-3-1549a

SD-01

Page 38 of 83


Rev. A



Rev. A

MRD-3-1549a

FIGURE 2-13 O & M Manual Mitsubishi Heavy Industries, Ltd.


HP HEATER P & ID (1/4) System Description

SD-01

Page 39 of 83


Rev. A



MRD-3-1546a

O & M Manual

FIGURE 2-14




SD-01

Page 40 of 83


MRD-3-1547a

Rev. A

Rev. A



MRD-3-1547a

O & M Manual

FIGURE 2-15



Rev. A

SD-01

Page 41 of 83



MRD-3-1548a

Rev. A



Rev. A

MRD-3-1548a

FIGURE 2-16

HP HEATER P & ID (4/4)

O & M Manual

System Description


SD-01

Page 42 of 83



Rev. A

MIN.FLOW SUCTION PUMP

DISCHARGE EXTRACTION COOLING WATER OUTLET

DRAIN

I P

COOLING WATER OUTLET

I P

I P

DRAIN BOX

I P

TIS TIS

TIS

TIS

TE M V

PI

BOILER FEED WATER PUMP

I P

POLAC02AP101 POLAC02AP102 TE

POLAC02AP301 POLAC02AP302

TIS TIS

I T

BOOSTER PUMP

MOTOR

STEP-UP GEAR

M V

TIS

TIS

DRAIN BOX DRAIN

S I P D

DRAIN T I

I T

PS

PS

PS

AIR VENT

DRAIN BOX

COOLING WATER INLET

PI

WARMING

TI

COOLING WATER INLET

AIR VENT COOLING WATER OUTLET

TI

TO BOILER FEED WATER PUMP

TO DRAIN BOX M

M

LS

BREATHER

1500L

COOLING WATER INLET

(LOW)

LEGEND SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION PRESSURE INDICATOR

FEED WATER

NORMALLY CLOSED

RELIEF VALVE

MECHANICAL SEAL FLUSHING WATER

SIGHT FLOW

FILTER

COOLING WATER

ORIFICE

3-WAY VALVE

TI

DIAL TYPE THERMOMETER

LUBRICATION OIL

MULTI-STAGE ORIFICE

FLANGE

TE

THERMO-COUPLE

DRAIN(WATER)

MECHANICAL SEAL COOLER

REDUCER

VM

VIBRATION DETECTOR

CONNECTED

STRAINER

UNION

PS

PRESSURE SWITCH

UNCONNECTED

MAGNET FILTER

CAP

LS

OIL LEVEL SWITCH

GLOBE VALVE

OIL COOLER

AIR BREATHER

LG

OIL LEVEL GAUGE

MOTOR

DRAIN PIT

GATE VALVE

MRD-3-0506

LG

M

AIR CONTROL VALVE

FILTER(DUPLEX)

CHECK VALVE

OIL PUMP

PI TIS

DIAL TYPE THERMOMETR WITH SWITCH



Rev. A


DISCHARGE EXTRACTION COOLING WATER OUTLET

DRAIN

I P


I P

I P

DRAIN BOX

I P

TIS TIS

TIS

TIS

TE M V

PI


I P

POLAC02AP101 POLAC02AP102 TE

POLAC02AP301 POLAC02AP302

TIS TIS

I T

BOOSTER PUMP

MOTOR

STEP-UP GEAR

M V

TIS

TIS

DRAIN BOX DRAIN

S I P D

DRAIN T I

I T

PS

PS

PS

DRAIN BOX

COOLING WATER INLET

PI

WARMING

TI

COOLING WATER INLET

AIR VENT

AIR VENT


TI


TO DRAIN BOX M

M

LS

BREATHER

1500L

COOLING WATER INLET

LG

(LOW)

LEGEND SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION PRESSURE INDICATOR

FEED WATER

NORMALLY CLOSED

RELIEF VALVE


SIGHT FLOW

FILTER

COOLING WATER

ORIFICE

3-WAY VALVE

TI


LUBRICATION OIL

MULTI-STAGE ORIFICE

FLANGE

TE

THERMO-COUPLE

DRAIN(WATER)


REDUCER

VM

VIBRATION DETECTOR

CONNECTED

STRAINER

UNION

PS

PRESSURE SWITCH

UNCONNECTED

MAGNET FILTER

CAP

LS

OIL LEVEL SWITCH

GLOBE VALVE

OIL COOLER

AIR BREATHER

LG

OIL LEVEL GAUGE

MOTOR

DRAIN PIT

GATE VALVE

M

AIR CONTROL VALVE

FILTER(DUPLEX)

CHECK VALVE

OIL PUMP

PI TIS

DIAL TYPE THERMOMETR WITH SWITCH

MRD-3-0506

FIGURE 2-17

LUBE OIL & ACW FLOW PATH OF MOTOR DRIVEN BOILER FEED WATER PUMP

O & M Manual

System Description





DISCHARGE EXTRACTION DRAIN


COOLING WATER OUTLET PI

PI PI

LUB.OIL INLET T=50 E

DRAIN BOX

PI

TIS TIS TE VM

STEAM TURBINE


TI

POLAC01AP101 POLAC01AP102 POLAC01AP103

BOOSTER PUMP

E T

MOTOR


VM

TIS

TIS

DRAIN

DRAIN BOX LUB.OIL OUTLET DRAIN

TI

TI

DRAIN BOX

WARMING

LS M

LG

COOLING WATER INLET

M


AIR VENT

AIR VENT

HH H L

OIL RETURN UNIT

TO DRAIN BOX

COOLING WATER INLET

SD-01

Page 43 of 83

LEGEND SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION

FEED WATER

GATE VALVE



AIR CONTROL VALVE

STRAINER

COOLING WATER

CHECK VALVE

REDUCER

TI


LUBRICATION OIL

NORMALLY CLOSED

DRAIN PIT

LG

OIL LEVEL GAUGE

DRAIN(WATER)

SIGHT FLOW

MAGNET FILTER

LS

OIL LEVEL SWITCH

ORIFICE

UNION

TE

THERMO-COUPLE

UNCONNECTED

MULTI-STAGE ORIFICE

CAP

VM

VIBRATION DETECTOR

GLOBE VALVE

FLANGE

AIR BREATHER

D E T C E N N O C

PI TIS

PRESSURE INDICATOR DIAL TYPE THERMOMETER WITH SWITCH

Rev. A



Rev. A


DISCHARGE EXTRACTION DRAIN


COOLING WATER OUTLET PI

PI PI

LUB.OIL INLET T=50 E

DRAIN BOX

PI

TIS TIS TE VM

STEAM TURBINE


TI


BOOSTER PUMP

E T

MOTOR


VM

TIS

TIS

DRAIN

DRAIN BOX LUB.OIL OUTLET DRAIN

TI

TI

DRAIN BOX

WARMING

LS M

LG

COOLING WATER INLET

M


AIR VENT

AIR VENT

HH H L

OIL RETURN UNIT

TO DRAIN BOX

COOLING WATER INLET

LEGEND SYMBOL

DESCRIPTION

MRD-3-0507


DESCRIPTION

SYMBOL

DESCRIPTION

SYMBOL

DESCRIPTION

GATE VALVE



AIR CONTROL VALVE

STRAINER

TIS

COOLING WATER

CHECK VALVE

REDUCER

TI


LUBRICATION OIL

NORMALLY CLOSED

DRAIN PIT

LG

OIL LEVEL GAUGE

DRAIN(WATER)

SIGHT FLOW

MAGNET FILTER

LS

OIL LEVEL SWITCH

PI

PRESSURE INDICATOR DIAL TYPE THERMOMETER WITH SWITCH

ORIFICE

UNION

TE

THERMO-COUPLE

UNCONNECTED

MULTI-STAGE ORIFICE

CAP

VM

VIBRATION DETECTOR

GLOBE VALVE

FLANGE

AIR BREATHER

D E T C E N N O C

O & M Manual

SYMBOL

FEED WATER

FIGURE 2-18

LUBE OIL & ACW FLOW PATH FOR TURBINE DRIVEN BOILER FEED WATER PUMP System Description

SD-01

Page 44 of 83

Section 3 – Major Equipment

3.0


Rev. A

MAJOR EQUIPMENT 3.1

Boiler Feed Water Booster Pump (TBFP-BP/ MBFP-BP) The booster pump of TBFP is driven by a separate motor whereas that of MBFP is coupled to the main motor itself. Booster pump is fitted with a double closed impeller and has single stage. The impeller is supported between bearings and the shaft is provided with mechanical seal. Sleeve type radial bearings and tilting pad type thrust bearings are provided on the shaft. The motor and the pump are coupled by a disc type coupling. Bearings are lubricated by forced lubrication oil method. The casing is radial volute type. Self flushing type mechanical seal with seal water cooler is provided for the shaft seals. Since this type of seal has its own pumping ring, seal water is supplied by mechanical seal rotation. Sectional view of a booster pump is shown in Figure 3-1.


3.0


Rev. A

MAJOR EQUIPMENT 3.1

Boiler Feed Water Booster Pump (TBFP-BP/ MBFP-BP) The booster pump of TBFP is driven by a separate motor whereas that of MBFP is coupled to the main motor itself. Booster pump is fitted with a double closed impeller and has single stage. The impeller is supported between bearings and the shaft is provided with mechanical seal. Sleeve type radial bearings and tilting pad type thrust bearings are provided on the shaft. The motor and the pump are coupled by a disc type coupling. Bearings are lubricated by forced lubrication oil method. The casing is radial volute type. Self flushing type mechanical seal with seal water cooler is provided for the shaft seals. Since this type of seal has its own pumping ring, seal water is supplied by mechanical seal rotation. Sectional view of a booster pump is shown in Figure 3-1.

O & M Manual

System Description

SD-01



3840

2300.2 3540

3520.2

1620.2

4330

5230 1020

2300.1

1620.1

5241

Rev. A

3520.1 4710

4230.2

2100

5711

9E/9A 9E/9A

11 E

11E

13E

13E

13 A

13 A 13A 13 E

5250.2 3610

3920.2

3870

5530

3510.2

39 20.1

5250.1

PART NO. 1 0 20 1620.1 1620.2 1650 2100 2300.1 2300.2 3510.1 3510.2 3520.1 3520.2 3540 3600 3610 3700 3840 3870 3920.1

MRD-3-0526

PART NAME VO L U TE CA S IN G SUCTION COVER SUCTION COVER JACKET COVER SHAFT IMPELLER IMPELLER BEARING HOUSING, LOWER HALF BEARING HOUSING, LOWER HALF BEARING HOUSING, UPPER HALF BEARING HOUSING, UPPER HALF THRUST BEARING HOUSING BEARING COVER BEARING END COVER BEARING SHELL THRUST BEARING PLATE THRUST BEARING SEGMENT COUNTER THRUST BEARING RING

5030 1650

PART NO. 3920.2 4200 4230.1 4230.2 4330 4510 4710 5020 5030 5070 5230 5241 5 2 5 0.1 5250.2 5530 5711 6440

5020

3700 4510

PART NAME COUNTER THRUST BEARING RING S E A L R IN G LABYRINTH RING LABYRINTH RING M E C H A N IC A L SE A L STUFFING BOX HOUSING S E A L C O VE R CASING WEARING RING IMPELLER WEARING RING DEFLECTOR SHAFT SLEEVE SEAL SLEEVE S P A C E R S L E EV E SPACER SLEEVE THRUST INSERT BEARING CLAMP OIL RING

9E/9A: 11E : 13E : 13A :

3510 .1

644 0

3600 5070

4230.1

COO LI NG WATER INLET/OUTLET MECHAN ICAL SEAL AIR VEN T LUBRIC ATION OIL I NLET LUBRIC ATION OIL O UTLET

FIGURE 3-1

SECTIONAL VIEW OF BOOSTER PUMP OF THE BOILER FEED WATER PUMP

O & M Manual

System Description



3.2

SD-01

Page 48 of 83


Rev. A

Boiler Feed Pump (TBFP & MBFP) The power plant is equipped with two (2) nos. of MBFPs and three (3) nos. of TBFPs. The main feed pump of the MBFP is coupled to the drive motor through a speed up gear where as the TBFP is directly coupled to the BFP turbine shaft. Figure 3-2 shows the sectional view of a boiler feed pump. The boiler feed pump is a multistage (three stage) centrifugal pump and is mounted horizontally, whereas booster pump is a single stage centrifugal pump. The boiler feed pump shaft is equipped with a mechanical seal on both ends of the pump. The mechanical seals minimize feed water leakage along the pump shaft penetrations through the casings. Feed water leakage from the feed pump inner casing flows along the shaft to the pumping ring, which discharges water to an external seal box cooler. The seal box cooler is a shell and tube type heat exchanger with auxiliary cooling water flowing on the shell side, and flushing water flowing through the tubes. The flushing water is returned to the seal assembly through a magnetic separator to flush the mechanical seal. The magnetic separator traps any small metal particles and is equipped with inlet and outlet isolation valves and a bypass with manual isolation valve. The seal assembly is flushed and lubricated by the flushing water which leaks between


3.2


Rev. A

Boiler Feed Pump (TBFP & MBFP) The power plant is equipped with two (2) nos. of MBFPs and three (3) nos. of TBFPs. The main feed pump of the MBFP is coupled to the drive motor through a speed up gear where as the TBFP is directly coupled to the BFP turbine shaft. Figure 3-2 shows the sectional view of a boiler feed pump. The boiler feed pump is a multistage (three stage) centrifugal pump and is mounted horizontally, whereas booster pump is a single stage centrifugal pump. The boiler feed pump shaft is equipped with a mechanical seal on both ends of the pump. The mechanical seals minimize feed water leakage along the pump shaft penetrations through the casings. Feed water leakage from the feed pump inner casing flows along the shaft to the pumping ring, which discharges water to an external seal box cooler. The seal box cooler is a shell and tube type heat exchanger with auxiliary cooling water flowing on the shell side, and flushing water flowing through the tubes. The flushing water is returned to the seal assembly through a magnetic separator to flush the mechanical seal. The magnetic separator traps any small metal particles and is equipped with inlet and outlet isolation valves and a bypass with manual isolation valve. The seal assembly is flushed and lubricated by the flushing water which leaks between the rotating and stationary seal rings in the mechanical seal assembly. For improved performance of the system vibration monitors are provided for both the pump and its drive equipment.

O & M Manual

System Description

SD-01


3920.2

3610


5090.2

5250.2

9210 16A 4200

3840 3870.2

PART NO.

MRD-3-0527

3920.1

1060 1070 1080.1 1080.2 1310 1570 1610 1630 1710 1711 2100 2300

3520.2

3870.1

11A

4711.2

11E

16E

PART N A M E

14A

5050

5010

1711

13A 5000

SUCTION CASING DISCHARGE CASING STAGE CA SING STAGE CA SING INLE T RING GUIDE PIECE CAS ING CO VER DISCHARGE COVER DIFFUSER DIFFU SER (LAST STAGE) SHA FT IMPELLER

1630

1080.2

1070

13E

3510.2

PART NO. 3 51 0. 1 3 51 0. 2 3 52 0. 1 3 52 0. 2 3600 3610 3700 3840 3 87 0. 1 3 87 0. 2 3 92 0. 1 3920.2

9E/9A

PART N A M E B E AR IN G H OU S IN G ( LO WE R H AL F) B E AR IN G H OU S IN G ( LO WE R H AL F) B E AR IN G H OU SI NG ( UP P ER H AL F) B E AR IN G H OU SI NG ( UP P ER H AL F) B EARING COVER B EARING END COVE R B EARING SHE LL THRUS T B EARING PLATE T HR US T B EA RI NG S EG ME NT T HR US T B EA RI NG S EG ME NT C OU NT ER T HR US T BE AR IN G RIN G COUNTER THRUST BEARING RING

5250.1

5420

PART NO. 4200 4230 4330 4710 4711.1 4711.2 5000 5010 5020 5030 5050 5070

5090.1 6030 1610 6020

PART N A M E SHA FTSEAL RING LABYRINTH RING MECHANICAL SEAL SE ALING COV ER SEAL BOX SEAL BOX RING SP LIT RING CAS ING W EAR RING IMPELLER WEA R RING LO OSER COLLA R DEFLECTOR

5030 1710 1080.1 2300

5020 5410

PART NO. 5080 5090.1 5090.2 5241 5250.1 5250.2 5410 5420 6020 6030 6701 9210

14E 1310

4711.1

11A 1060

5510 5241 1570

11E 4710

4330 9E/9A

6701

3520.1 3700

2100

4230 13E 5080 5070 13A 3510.1 3600

PART N A M E OIL DEFLECTOR ADJUSTING RING ADJUSTING RING S EAL SLEE VE SPACE R SLEEVE SPACE R SLEEVE S TAGE BUSH THROTTLE BUS HING B ALANCING DISC SEAT B ALANCING PISTON A IR VENT S HAFT NUT

9E:COOLING WATER INLET 9A:COOLING WATER OUTLET 11E:SEAL FLUSHING INLET 11A:SEAL FLUSHING OUTLET 13E:OIL INLET 13A:OIL OULET 14E:BALANCING WATER INLET 14A:BALANCING WATER OUTLET 16E:OIL INLET 16A:OIL OUTLET

FIGURE 3-2

SECTIONAL VIEW OF BOILER FEED PUMP

O & M Manual

System Description


SD-01

Page 50 of 83


3.3

Rev. A


Rev. A

MBFP Speed up Gear The speed up gear of the MBFP is shown in Figure 3-3. It has thus two (2) separate shafts, one connected to the drive motor and the other connected to the pump whose centre lines are parallel. The gears are of double helical type. The speed ratio is 2.771:1. The gear is force lubricated by the lube oil system. Dial type thermometer with temperature switch is provided for bearing temperature monitoring. The drive motor side is fitted with a disc coupling whereas the pump side is fitted with a diaphragm coupling.


3.3


Rev. A

MBFP Speed up Gear The speed up gear of the MBFP is shown in Figure 3-3. It has thus two (2) separate shafts, one connected to the drive motor and the other connected to the pump whose centre lines are parallel. The gears are of double helical type. The speed ratio is 2.771:1. The gear is force lubricated by the lube oil system. Dial type thermometer with temperature switch is provided for bearing temperature monitoring. The drive motor side is fitted with a disc coupling whereas the pump side is fitted with a diaphragm coupling.

O & M Manual

System Description

SD-01



MRD-3-1486

FIGURE 3-3

SECTIONAL VIEW OF MBFP SPEED UP GEAR

O & M Manual

System Description


SD-01

Page 52 of 83


3.4

Rev. A


Rev. A

HHP Boiler Feed Water Pump The power plant is equipped with three (3) Nos. of motor driven HHP BFWPs to supply feed water to Partner. The HHP BFWP is a multistage (seven stage) centrifugal pump. The shaft is equipped with a mechanical seal on both ends of the pump. The mechanical seals minimize feed water leakage along the pump shaft penetrations through the casings. Feed water leakage from the feed pump inner casing flows along the shaft to the pumping ring, which discharges water to an external seal box cooler. The seal box cooler is a shell and tube t ype heat exchanger with closed cycle cooling water flowing on the shell side, and flushing water flowing through the tubes. The flushing water is returned to the seal assembly through a magnetic separator to flush the mechanical seal. The magnetic separator traps any small metal particles and is equipped with inlet and outlet isolation valves and a bypass with manual isolation valve. The seal assembly is flushed and lubricated by the flushing water which leaks between the rotating and stationary seal rings in the mechanical seal assembly. assembly. Sectional view of the HHP BFWP is shown in Figure 3-4. For improved performance of the pumps vibration monitor system is provided for both pump and its drive motor.


3.4


Rev. A

HHP Boiler Feed Water Pump The power plant is equipped with three (3) Nos. of motor driven HHP BFWPs to supply feed water to Partner. The HHP BFWP is a multistage (seven stage) centrifugal pump. The shaft is equipped with a mechanical seal on both ends of the pump. The mechanical seals minimize feed water leakage along the pump shaft penetrations through the casings. Feed water leakage from the feed pump inner casing flows along the shaft to the pumping ring, which discharges water to an external seal box cooler. The seal box cooler is a shell and tube t ype heat exchanger with closed cycle cooling water flowing on the shell side, and flushing water flowing through the tubes. The flushing water is returned to the seal assembly through a magnetic separator to flush the mechanical seal. The magnetic separator traps any small metal particles and is equipped with inlet and outlet isolation valves and a bypass with manual isolation valve. The seal assembly is flushed and lubricated by the flushing water which leaks between the rotating and stationary seal rings in the mechanical seal assembly. assembly. Sectional view of the HHP BFWP is shown in Figure 3-4. For improved performance of the pumps vibration monitor system is provided for both pump and its drive motor.

O & M Manual

System Description

SD-01



16E 9210

3610

5000

4200

6701

5040.2

3920.2 16A

3840

3700.2

15A

3520.2

3870.1

3870.2

1630 9E/9A

13A 3920.1

PART NO.

3540

13E

PART N A M E

4711.2

5070 8B

PART NO.

14A

4710

5010

5040.1 1070

5020

1060 1080

12E

3510.2

PART N A M E

1711

1610

5050 5420

PART NO.

5030

4711.1

5241

2300 6020

PART N A M E

6030

3600 15A

5510

1710

PART NO.

9E/9A

1310

6B

PART N A M E

1060 1070

SUCTION CASING DISCHARGE CASI NG

3 51 51 0. 0. 2 3 52 52 0. 0. 1

B EA EA RI RI NG NG H OU OU SI SI NG NG L OW OW ER ER H AL AL F B EA EA RI RI NG NG H OU OU SI SI NG NG U PP PP ER ER H AL AL F

3 92 92 0. 0. 2 4000

C OU OU NT NT ER ER TH TH RU RU ST ST BE BE AR AR IN IN G R IN IN G GASKET

5040.1 5040.2

ADJUST RING ADJUST RING

1080 1310

STAGE CASING INLET RING

3 52 52 0. 0. 2 354 0

B EA EA RI RI NG NG H OU OU SI SI NG NG U PP PP ER ER H AL AL F T HR HRUS T BE AR ARI NG NG HO U US S IN ING

4200 4230

SEAL RING LABYRINTH RI RING

5050 5070

LOOSE CO COLLER DEFLECTOR

1570 1610

GUIDE PIECE CASING COVER

3600 3610

BEARING COVER BEARING END COVER

4330 4710

MECHANICAL SEAL SEALING COVER

5080 5241

OIL DEFLECTOR SEAL SLEEVE

1630 1710

DISCHARGE COVER DIFFUSER

37 00 .1 .1 37 00 .2 .2

S PL PL IT IT B EA EA RI NG NG SH SH ELL S PL PL IT IT B EA EA RI NG NG SH SH ELL

4711.1 4711.2

SEAL BOX SEAL BOX

5420 5510

THROT TLE BU BUSHING SPACER DISC

1711 2100

DIFFUSER, LAST STAGE SHAFT

3840 3 87 0. 0. 1

T HRUST BEARING PL PLATE T HR HR US T B EA EA RI RI NG NG SE SE GM GM EN EN T

5000 5010

RING SPLIT RI NG

6020 6030

BALANCI NG DISC SE SEAT BALANCING PI PISTON

2300 3 51 51 0. 0. 1

IMPELLER B EA EA RI RI NG NG H OU OU SI SI NG NG L OW OW ER ER H AL AL F

3 87 0. 0. 2 3 92 92 0. 0. 1

T HR HR US T B EA EA RI RI NG NG SE SE GM GM EN EN T C OU OU NT NT ER ER T HR HR US US T B EA EA RI RI NG NG R IN IN G

5020 5030

CASI NG WEAR RING IMPELLER WEAR RING

6701 9210

AIR VENT SHAFT NUT

Rev. A

3520.1

3510.1 1570

3700.1

4230 8B

4330

13E

2100

5080

13A

6B : SUCTION CASNG DRAIN 8B : LEAKAGE DRAIN DRAIN 9E : COOLING WATER INLET 9A : COOLING WATER OUTLET 12E : WARMING WATER INLET 13E : FORCED OIL INLET 13A : FORCED OIL OUTLET 14A : BALANCING WATER OUTLET 15A : AIR VENT 16E : FORCED OIL INLET 16A : FORCED OIL OUTLET

MRD-3-0528

FIGURE 3-4

SECTIONAL VIEW OF HHP BFW PUMP

O & M Manual

System Description



3.5

SD-01

Page 54 of 83


Rev. A

HP Boiler Feed Water Pump The power plant is equipped with four (4) Nos. of motor driven HP BFWPs to supply feed water to Partner. The HP BFWP is a multistage (three stage) centrifugal pump and is mounted horizontally. The pump shaft is equipped with a mechanical seal on both ends of the pump. The mechanical seals minimize feed water leakage along the pump shaft penetrations through the casings. Feed water leakage from the feed pump inner casing flows along the shaft to the pumping ring, which discharges water to an external seal box cooler. The seal box cooler is a shell and tube type heat exchanger with auxiliary cooling water flowing on the shell side, and flushing water flowing through the tubes. The flushing water is returned to the seal assembly through a magnetic separator to flush the mechanical seal. The magnetic separator traps any small metal particles and is equipped with inlet and outlet isolation valves and a bypass with manual isolation valve. The seal assembly is flushed and lubricated by the flushing water which leaks between the rotating and stationary seal rings in the mechanical seal assembly. Sectional view of the HP BFWP is shown in Figure 3-5. For improved performance of the pumps vibration monitor system is provided for both the pump and its drive motor.


3.5


Rev. A

HP Boiler Feed Water Pump The power plant is equipped with four (4) Nos. of motor driven HP BFWPs to supply feed water to Partner. The HP BFWP is a multistage (three stage) centrifugal pump and is mounted horizontally. The pump shaft is equipped with a mechanical seal on both ends of the pump. The mechanical seals minimize feed water leakage along the pump shaft penetrations through the casings. Feed water leakage from the feed pump inner casing flows along the shaft to the pumping ring, which discharges water to an external seal box cooler. The seal box cooler is a shell and tube type heat exchanger with auxiliary cooling water flowing on the shell side, and flushing water flowing through the tubes. The flushing water is returned to the seal assembly through a magnetic separator to flush the mechanical seal. The magnetic separator traps any small metal particles and is equipped with inlet and outlet isolation valves and a bypass with manual isolation valve. The seal assembly is flushed and lubricated by the flushing water which leaks between the rotating and stationary seal rings in the mechanical seal assembly. Sectional view of the HP BFWP is shown in Figure 3-5. For improved performance of the pumps vibration monitor system is provided for both the pump and its drive motor.

O & M Manual

System Description

SD-01


9210

9320.2

3610


3920.2

5250.2

3870.1

3870.2

13A

3840

1060 1070 1080 1310 1570 1610 1630 1710 1711 2100 2300 3510.1 3510.2

3520.2

13E 3540

PART NO.

5070

5000

5040.2 4200

MRD-3-0529

3920.1

3700.2

13A

5250.4 4710

1630

PART N A M E

5010.2

4711.2

3510.2

SUCTION CASING DISCHARGE CASING STAGE CASING INLET RING GUIDE PIECE CASING COVER DISCHARGE COVER DIFFUSER DIFFUSER, LAST STAGE SHAFT IMPELLER BEARING HOUSING LOWER HALF BEARING HOUSING LOWER HALF

1710.2 14A

3520.1 3520.2 3 54 0 3600 3610 3 70 0. 1 3 70 0. 2 3840 3 87 0. 1 3 87 0. 2 3920.1 3920.2 4200

1610

1070

6020 5420

PART NO.

5040.1

PART N A M E BEARING HOUSING UPPER HALF BEARING HOUSING UPPER HALF T HRUST B EARI NG HOUS ING BEARING COVER BEARING END COVER S PL IT B EA RI NG S HE LL S PL IT B EA RI NG S HE LL THRUST BEARING PLATE T HR US T B EA RI NG SE GM EN T T HR US T B EA RI NG SE GM EN T COUNTER THRUST BEARING RING COUNTER THRUST BEARING RING SEAL RING

PART NO. 4230 4330 4710 4711.1 4711.2 5000 5010 5020 5030 5040.1 5040.2 5050

1711

5030.2 12E

6030

PART N A M E LABYRINTH RING MECHANICAL SEAL SEALING COVER SEAL BOX SEAL BOX RING SPLIT RING CASING WEAR RING IMPELLER WEAR RING ADJUST RING ADJUST RING LOOSE COLLER

2300

2310 5020.2

PART NO. 5070 5080 5241.1 5241.2 5250.1 5250.2 5420 5510 6020 6030 9210 9320.1 9320.2

1710.1

1060

1080.1

4711.1

1310

14E

15A 9E/9A

5020.1 5030.1

PART N A M E DEFLECTOR OIL DEFLECTOR SEAL SLEEVE SEAL SLEEVE SPACER SLEEVE SPACER SLEEVE THROTTLE BUSHING SPACER DISC BALANCING DISC SEAT BALANCING PISTON SHAFT NUT SNAP RING SNAP RING

1570

9E/9A 4330

9320 5510

5080

3700.1

3520.1 2100

4230

5241.1

3510.1

13A

13E

3600

9E : COOLING WATER INLET 9A : COOLING WATER OUTLET 12E : WARMING WATER INLET 13E : FORCED OIL INLET 13A : FORCED OIL OUTLET 14A : BALANCING WATER OUTLET 14E : BALANCE WATER INLET 16E : FORCED OIL INLET 16A : FORCED OIL OUTLET

FIGURE 3-5

SECTIONAL VIEW OF HP BFW PUMP

O & M Manual

System Description


SD-01

Page 56 of 83


3.6

Rev. A


Rev. A

HP Heater Two (2) HP Heaters are connected in cascade in a single stream of feed water –HP1&2 heaters. There are three (3) sets of HP1&2 heaters which feed water to the boilers through a common supply header. The heaters are shell and U-tube type and mounted horizontally. The feed water flows through the tubes of the heaters. The steam from the HP/MP steam header flows through the shell side of the heaters and is used to raise the temperature of the feed water in each heater. The steam is condensed in the heater shell, and the condensed steam is cascaded to the next lower pressure heater. This increases the thermal efficiency of t he system. HP1 heater has two (2) heat exchange sections i.e., condensing section and sub-cooling section. The feed water in tube side flows first through the subcooling section, and then through the condensing section. In the heater shell side, the steam comes in contact with the tube bundle surface for heat transfer through the condensing section and then through the sub-cooling section. Sectional view of the HP1 heater is shown in Figure 3-6. HP2 heater has three (3) heat exchange sections i.e. desuperheating section, condensing section, and sub-cooling section. The feed water in tube side flows


3.6


Rev. A

HP Heater Two (2) HP Heaters are connected in cascade in a single stream of feed water –HP1&2 heaters. There are three (3) sets of HP1&2 heaters which feed water to the boilers through a common supply header. The heaters are shell and U-tube type and mounted horizontally. The feed water flows through the tubes of the heaters. The steam from the HP/MP steam header flows through the shell side of the heaters and is used to raise the temperature of the feed water in each heater. The steam is condensed in the heater shell, and the condensed steam is cascaded to the next lower pressure heater. This increases the thermal efficiency of t he system. HP1 heater has two (2) heat exchange sections i.e., condensing section and sub-cooling section. The feed water in tube side flows first through the subcooling section, and then through the condensing section. In the heater shell side, the steam comes in contact with the tube bundle surface for heat transfer through the condensing section and then through the sub-cooling section. Sectional view of the HP1 heater is shown in Figure 3-6. HP2 heater has three (3) heat exchange sections i.e. desuperheating section, condensing section, and sub-cooling section. The feed water in tube side flows first through the sub-cooling section, and then through the condensing section and finally through desuperheating section. In the heater shell side, the steam comes in contact with the tube bundle surface for heat transfer through the desuperheating section, the condensing section and finally the sub-cooling section. Sectional view of the HP2 heater is shown in Figure 3-7.

O & M Manual

System Description

SD-01



FEEDWATER OUTLET

FEEDWATER INLET

STEAM INLET

Rev. A

DRAIN INLET

DRAIN OUTLET

FIGURE 3-6 O & M Manual

SECTIONAL VIEW OF HP1 HEATER System Description


SD-01

Page 58 of 83



FEEDWATER OUTLET

FEEDWATER INLET

STEAM INLET

DRAIN OUTLET

Rev. A



STEAM INLET

FEEDWATER OUTLET

FEEDWATER INLET

DRAIN OUTLET

FIGURE 3-7


O & M Manual

System Description


SD-01

Page 59 of 83

Section 4 – Technical Data of Major Equipment

4.0

Rev. A


Rev. A

TECHNICAL DATA OF MAJOR EQUIPMENT The following tables give the technical specifications of all the main equipments in the Boiler Feed Water System. Note: All the technical specification values are taken from contract specifications / heat and water balance sheet. TABLE 4-1


Description Equipment Number TBFP-BP MBFP-BP

Details P0LAC01AP301/302/303 P0LAC02AP301/302

Type

Centrifugal, horizontal, single stage

Number of Pumps

Five (5) sets ( each 34% capacity)

Capacity

1,645m /h

Suction temperature

128.3 C

Suction pressure

4.0kg/cm

3

o

2


4.0


Rev. A

TECHNICAL DATA OF MAJOR EQUIPMENT The following tables give the technical specifications of all the main equipments in the Boiler Feed Water System. Note: All the technical specification values are taken from contract specifications / heat and water balance sheet. TABLE 4-1


Description

Details

Equipment Number TBFP-BP MBFP-BP

P0LAC01AP301/302/303 P0LAC02AP301/302

Type

Centrifugal, horizontal, single stage

Number of Pumps

Five (5) sets ( each 34% capacity)

Capacity

1,645m /h

Suction temperature

128.3 C

Suction pressure

4.0kg/cm

Discharge pressure

14.76kg/cm

Total head

115m

Synchronous speed

1,800rpm

Driving method

Direct coupling

Driving motor TBFP-BP)

O & M Manual

3

o

2

(only

2

for

610KW / 4,160V / 60Hz

System Description

SD-01


TABLE 4-2


Rev. A

MOTOR DRIVEN BFP (MBFP)

Description

Details

Quantity

One (1) set x 2 (34% each)

Equipment number

P0LAC02AP101/102 Horizontal shaft, Multistage,

Type ring section, Centrifugal type (MHG 7/3) 3

Capacity at pump suction

1,645m /h

Bleed water flow

74.8m /h

Capacity at pump outlet

1,570.2m /h

Suction temperature

128.3 C

Suction pressure

14.76kg/cm

Bleeding pressure

96.5kg/cm

Discharge pressure

139kg/cm

Total head

1,327m

Pump speed

4,930rpm

Drive motor

7,800kW/13.8kV/4P/60Hz

Driving method

Coupled to speed up gear

Lubrication

Forced oil

3

3

o

2

TABLE 4-3

2

2

MBFP SPEED UP GEAR

Description

Details

Quantity

One (1) set x 2

Equipment Number

P0LAC02AE101/102

Type

Double helical gear precision type

Speed ratio

2.771:1

O & M Manual

System Description

SD-01


TABLE 4-4


TURBINE DRIVEN BFP (TBFP)

Description

Details

Quantity


Equipment number

P0LAC01AP101/102/103

Type

Rev. A

Horizontal shaft, Multistage, ring section, Centrifugal type (MHG 7/3) 3

Capacity at pump suction

1,645m /h

Bleed water quantity

74.8m /h

Capacity at pump outlet

1,570.2m /h

Suction temperature

128.3 C

Suction pressure

14.76kg/cm

Bleeding pressure

96.5kg/cm

Discharge pressure

139kg/cm

Total pressure

1,327m

Pump speed

4,930rpm

Drive equipment

Steam turbine

Driving method

Direct coupling

Lubrication

Forced oil (by BFPT lube oil supply skid)

O & M Manual

3

3

o

2

2

2

System Description

SD-01



TABLE 4-5

Rev. A

HHP BFW PUMP

Description

Details

Quantity


Equipment number

P0NAB03AP101,P0NAB03AP102,P0NAB03AP103 Horizontal shaft, Multistage,

Type ring section, Centrifugal type –MHG 5/7 Capacity at pump outlet

500t/h

Suction temperature

128.3 C

Suction pressure

3.6kg/cm (max 5kg/cm )

Discharge pressure

150.2kg/cm

2

Total pressure

146.6kg/cm

2

Pump speed

3,580rpm

Bearing lubrication

Forced oil

Drive motor

2,650kW/13.8kV/4P/60Hz

o

2

2

TABLE 4-6

HP BFW PUMP

Description

Details

Quantity


Equipment number

P0NAB03AP101/102/103/104

Type

Horizontal shaft, Multistage, ring section, Centrifugal type

Capacity (at pump outlet)

530t/h

Suction temperature

128.3 C

Suction pressure

3.8kg/cm

Discharge pressure

67.7kg/cm

2

Total pressure

63.9kg/cm

2

Synchronous speed

3,600rpm

Bearing lubrication

Forced oil

Drive motor

1,240kW/4.0kV/4P/60Hz

O & M Manual

o

2

System Description

SD-01


TABLE 4-7


MBFP, TBFP-BP,HHP BFWP AND HP BFWP LUBE OIL PUMPS

Description

Details

Quantity

One (1) set x24

Equipment number MBFP TBFP-BP HHP BFWP HP BFWP

P0LAC02AP201 to 204 P0LAC01AP201 to 206 P0NAB03AP201 to 206 P0NAB02AP201 to 208

Type

Gear type

Number of pumps

Two(2)AC pumps per unit

Motor MBFP TBFP-BP HHP BFWP HP BFWP

5.5kW/460V/1,800rpm/60Hz 1.5kW/460V/1,800rpm/60Hz 1.5kW/460V/1,800rpm/60Hz 1.5kW/460V/1,800rpm/60Hz

Pump capacity MBFP TBFP-BP HHP BFWP HP BFWP

366LPM 18LPM 100LPM 60LPM

O & M Manual

Rev. A

System Description

SD-01



TABLE 4-8

Rev. A

HP1 HEATER

Description

Details

Quantity

One (1) set x 3

Equipment number

P0LAD01AC101/102/103

Type

Horizontal U-type with an integral drain cooling zone

Heating surface

1,594m

Number of U-tubes

1,735

Active straight tube length

8,701mm

Tube outside diameter

15.88mm

Tube thickness

1.47mm

Feed water flow

1,797,910kg/h

Tube design pressure

220kg/cm

Tube design temperature

230 C

Shell side pressure

27.3kg/cm

design

Shell design temp. top /

2

2

o

2

o

o

455 C / 230 C

bottom Feed water inlet

o

130.2 C

temperature Feed water outlet temperature Tube connection

O & M Manual

o

182.4 C Expanded and seal welded

System Description

SD-01



TABLE 4-9

HP2 HEATER

Description

Details

Quantity

One (1) set x 3

Equipment Number

P0LAD02AC101/102/103

Type

Horizontal U-type with desuperheating and an integral drain cooling zone

Heating surface

1,175m

Number of U tubes

1792

Active straight tube length

6,058mm

Tube outside diameter

15.88mm

Tube thickness

1.47mm

Feed water flow

1,797,910kg/h

Tube design pressure

220kg/cm

Tube design temperature

262 C

Shell side pressure

48.0kg/cm

design

Shell design temp. top / bottom Feed water inlet temperature Feed water outlet temperature Tube connection

O & M Manual

Rev. A

2

2

o

2

o

o

490 C / 262 C o

182.4 C o

237.0 C Expanded and seal welded

System Description

SD-01

Section 5 – Process Control

5.0


Rev. A

PROCESS CONTROL All the equipments are controlled by the DCS through the Operator console in the central control room (CCR1) or the local control room (LCR). 5.1

MBFP, TBFP, HHP BFWP & HP BFWP Control All the pumps receive water supply from the deaerator and discharges the water at various pressures as already discussed. All the pumps’ bearings are forced lubricated by oil. Thus all the pumps are identical in characteristics and have identical start / stop control as detailed below. M/TBFP Start

The M/TBFP group control allows the operator to select either BFPT group or MBFP group. Under subgroup control of the TBFP, the control is divided into water and steam group. The group command is released only if the deareator level is normal. The steam group controls the BFPT and this part is discussed under BFPT System description SD-12. The water group controls the pump flow. The BFPT pump subgroup startup control ensures that the lube oil system of the selected pump is running, the minimum flow CV (P0LAB12AA700-704) is on auto and the pump discharge MOV (P0LAB12AA002/4/6/8/10) is closed. The control system issues a start command to the Booster Pump motor provided the feed water header pressure is normal and feed water demand is more than the set value. If MBFP is selected under the group, the start command is issued to the main motor itself for the identical conditions of the pump as explained above for water group of TBFP under normal operation of the plant i.e. only TBFPs in service. At drive level of the pump, the control system checks the lube oil pressure is adequate before start of the motor. The boiler feed pump is started either by the electric motor or by the turbine as the case may be. Once the pump is started, the discharge MOV opens. This completes the pump start sequence. M/TBFP St op

The pumps can be stopped on group control through a shut down command. The group shut down command to the MBFP is automatically initiated when any of the TBFP startup end state is realized and a MBFP shut down command is issued. Similarly the shut down command for the TBFP is automatically realized when any standby MBFP startup end state is realized and the TBFP shut down command is issued. The TBFP shut down end state is realized once the discharge MOV is closed and the drive turbine is stopped. The lube oil pump automatically stop after a definite time interval from the pump shut down state. For more detailed explanation refer to the operation manual OPM-01.

O & M Manual

System Description

SD-01



Rev. A

HHP BFWP Sta rt

The HHP BFWP group control allows the operator to select one of the three (3) HHP BFWPs. Under subgroup control of the HHP BFWP, start command is issued to the pump drive, discharge MOV and a select command for one of two (2) lube oil pumps. The group command is released to the selected HHP BFWP only if the deareator level is normal. The HHP BFWP subgroup startup control ensures that the lube oil system of the selected HHP BFWP is running, the minimum flow CV (P0NAB03AA700-702) is on auto and the pump discharge MOV (P0NAB03AA008/10/12) is closed. The start command is issued to the HHP BFWP motor for the conditions of the pump as explained above. At drive level of the HHP BFWP, the control system checks the lube oil pressure is adequate. Once the HHP BFWP is started, the discharge MOV opens. This completes the BFWP start sequence. HHP BFWP Stop

The HHP BFWPs can be stopped on group control through a shut down command. The group shut down command to the HHP BFWP is automatically initiated when HHP BFWP shut down command is issued. The shut down end state is realized once the discharge MOV is closed and the drive motor is stopped. The lube oil pump automatically stops after a definite time interval from the pump shut down state. For more detailed explanation refer to the operation manual OPM-01. HP BFW P Start

Similar to HHP BFWP, the HP BFWP group control allows the operator to select one of the four (4) HP BFWPs. Under subgroup control of the HP BFWP, start command is issued to the pump drive, discharge MOV and a select command for one of two (2) lube oil pumps. The group command is released to the selected HP BFWP only if the deareator level is normal. The HP BFWP subgroup startup control ensures that the lube oil system of the selected HP BFWP is running, the minimum flow CV (P0NAB03AA700-703) is on auto and the pump discharge MOV (P0NAB03AA008/10/12/14) is closed. The start command is issued to the HP BFWP motor for the conditions of the pump as explained above. At drive level of the HP BFWP, the control system checks the lube oil pressure is adequate. Once the HP BFWP is started, the discharge MOV opens. This completes the HP BFWP start sequence. HP BFWP Stop

The HP BFWPs can be stopped on group control through a shut down command. The group shut down command to the HP BFWP is automatically initiated when HP BFWP shut down command is issued. The shut down end state is realized once the discharge MOV is closed and the drive motor is stopped. The lube oil pump automatically stops after a definite time interval from the pump shut down state. O & M Manual

System Description

SD-01



Rev. A

For more detailed explanation refer to the operation manual OPM-01. 5.2

Minimum Flow Recirculation Control for BFP, HHP BFWP and HP BFWP The minimum flow recirculation CV (P0LAB12AA700-704, P0NAB03AA700702, and P0NAB03AA700-703) of each feed pump is controlled automatically to ensure a minimum flow through the pump. The control scheme is identical to all the feed pumps. A flow transmitter (P0LAB12CF001-005, P0NAB03CF001003, P0NAB03CF001-004) on the discharge of each pump sends a flow signal to the DCS minimum flow recirculation control system associated to the appropriate feed pump. The CV modulates to maintain the minimum flow through the pump whenever the discharge flow is less. The flow is required to prevent pump from damage due to overheating of the pump internals and cavitations.

5.3

HP Feed Water Heater Level Control For the best performance of the heaters it is very important to control the level of the condensate. This function is carried out by measuring the condensate level in the HP heaters and controlling the level by the operation of the drain level control valve through DCS. The control system is identical for all the three (3) sets of HP1 heaters and HP2 heaters. HP1 Heater Contro l

There are three (3) HP1 heaters in the system and the control of each heater is identical. The system consists of two (2) level control valves (P0LCH01 AA700/02/04) called normal drain level control valve and emergency drain level control valve (P0LCH01AA701/03/05) and are independently operated. Two (2) level transmitters (P0LAD01CL101/2/3/4/5/6) measure the level in the heater. For the drain level control valves the desired value of the level is preset, but can be modified through the bias station in the OPS. The normal drain level control valve modulates in tandem with the emergency level control valve or independently to maintain the desired level. HP2 Heater Contro l

There are three (3) HP2 heaters in the system and the control of each heater is identical. The system consists of two (2) level control valves called normal drain level control valve (P0LCH02AA700/02/04)and emergency drain level control valve(P0LCH02AA701/03/05) and are independently operated. Two (2) level transmitters (P0LAD02CL101/2/3/4/5/6) measure the level in the heater. For the drain level control valves the desired value of the level is preset, but can be modified through the bias station in the OPS. The normal drain level control valve modulates in tandem with the emergency level control valve or independently to maintain the desired level.

O & M Manual

System Description

SD-01


5.4


Rev. A

HP Heater Feed Water Outlet Temperature Control This system measures the inlet (P0LAB21CT001-003) and outlet (P0LAB41CT001-003) feed water temperature of the HP2 heater and controls the steam admission to HP1&2 heaters respectively as per the set values through two (2) independent control valves (P0LAB02AA704-6 & (P0LAB03AA705-7). The control system of each heater is identical. The temperature is measured by a temperature element. The preset temperature can be biased through a feed water temperature bias station in the OPS. The control valves remains closed if the inlet MOV (P0LAB02AA008/12/16 & (P0LAB03AA013/019/025) is closed. When the inlet MOV is being opened the control valve is positioned to a warm up position as per the set value in the controller. After the set time of warm up of the system the control valve modulates as per the temperature to be controlled.

5.5

TBFP Discharge Pressure Control The pressure control loop maintains a constant pressure at the common discharge header of the TBFPs. The two (2) pressure transmitters (P0LAB12CP106/7) sense the pressure in the header. In case of any abnormality in the pressure measurement, the control loop switches over from auto to manual. Depending on the number of TBFPs, the individual pump control loop in DCS sends a control demand to turbine DEH control system. If the pump is in stopped condition the control is set to 0%. The TBFP controller in the OPS allows the operator to vary the demand manually. .

O & M Manual

System Description

SD-01

Section 6 – Related Systems

6.0


Rev. A

RELATED SYSTEMS 6.1

Deaerator Feed Water System The feed water is processed in the deaerator to remove the dissolved oxygen. The deaerated feed water is stored in the bottom of the deaerator from where water is sucked by the BFPs/BFWPs. For more details on the Deaerator Feed Water System, refer to its associated system description SD-15.

6.2

Boiler Pressure Part and Main Steam Supply System The Boiler Pressure Part and Main Steam System provide the means for transferring the heat released during combustion of fuel to the feed water. This process generates superheated steam at the HHP steam pressure and temperature required by the turbine and the Partner. In the boiler, the heated feed water from the Boiler Feed Water System flows through the tubes of the boiler economizer where it is additionally heated by the hot gases of combustion leaving the boiler. After flowing through the economizer tubes, the feed water enters and mixes with water which is already in the steam drum. The water is then converted into steam. Spray water from the Boiler Feed Water System is supplied to the desuperheaters to control final HHP steam temperature. Spray water to the desuperheaters is controlled by modulating spray control valves that automatically respond to the command signals from the DCS. For more details, refer to its associated system description SD-02.

6.3

Steam Turbine and Turbine Bypass System The boiler supplies superheated HHP steam to the steam turbine and turbine bypass system. The turbine system converts the thermal energy in the steam into mechanical energy to drive the generator. Steam flows from the HHP steam header through the turbine MSVs and GVs into the turbine. HP/MP/LP steam is extracted from the turbine at three (3) stages for further use by the Partner. The steam after converting thermal energy into mechanical energy is passed into the condenser and the condensate water is then recycled. The turbine bypass system is used for emergency such as high HHP steam pressure. The HHP steam enters the turbine inlet pipe and is diverted to the condenser through the pressure control valve. Before the steam is dumped into the condenser, the steam is conditioned by the boiler feed water. For more details, refer to the Steam Turbine and Turbine Bypass System description SD-09.

O & M Manual

System Description

SD-01

Section 6 – Related Systems

6.4


Rev. A

HHP/HP/MP/LP Steam System The requirement of HP, MP and LP steam to the Partner is supplied either through the pressure reducing station or through the extraction from the turbine. The high temperature steam at the pressure reducing station is cooled by the spray water supplied by the intermediate stage of the BFPs. For more details, refer to the associated system description SD-17.

6.5

Boiler Feed Pump Turbine (BFPT) System During normal plant operation TBFPs are in service. The BFPT receives driving steam from HP steam header. The steam flow path to each BFPT is identical. Steam is admitted to the BFPT through a manual operated valve, a MOV and a steam flow nozzle, all connected in cascade. The flow transmitter fitted across the flow nozzle measures the steam flow through the turbine. The steam after doing work on the BFPT passes out to the deaerator heating steam pipe through a MOV. For more details, refer to its associated system description SD-12.

6.6

Nitrogen Gas Seal System This system consists of a gas distribution system with valves, piping and fittings. The nitrogen gas is received through the manual operated valve at the Partner terminal. A pressure regulator at the out let of this isolating valve maintains a constant nitrogen pressure at the nitrogen distribution header. This pressure regulator has a manual operated isolating valve at the inlet side and the outlet side. A manual operated bypass valve is provided across the pressure regulating station for manual operation. Pressure indicators are fitted at the inlet and outlet side of the pressure regulating station. A safety relief valve protects the system from exceeding the design pressure. A drain valve on the header is used during charging to remove moisture. For more details, refer to its associated system description SD-36.

6.7

Auxiliary Cooling Water System The Auxiliary Cooling Water System supplies cooling water to the following equipment in the Boiler Feed Water System. •

Lube oil cooler

•

Motor coolers (for MBFP)

•

Seal water coolers (for all BFPs & BFWPs)

For more details, refer to its associated system description SD-21.

O & M Manual

System Description

SD-01

Section 7 – Instrumentation, Alarm and Trip Set Points

7.0


Rev. A

INSTRUMENTATION, ALARM & TRIP SET POINTS 7.1

Instrumentation The following instrumentation is provided in the Boiler Feed Water System for monitoring, control, annunciation and protection stop of equipment/system. For vendor supplied instruments refer to the vendor’s manual. 7.1.1

Remote Instruments Pressure Ind icating Transm itters/ Pressu re Transm itters (PIT/PT) •

MBFP & TBFP discharge pressure (P0LAB12CP101/2/3/4/5)

•

BFP discharge header pressure (P0LAB12CP106/7)

•

BFPT inlet HP steam supply pressure (P0LBR01CP101)

•

BFPT exhaust steam pressure (P0LBE11CP101/2/3)

•

HHP BFWP discharge pressure (P0NAB03CP101/2/3)

•

HHP BFWP discharge header pressure (P0NAB03CP104)

•

HHP BFW pressure at metering station (P0NAB03CP151/2)

•

HP BFWP discharge pressure (P0NAB02CP101/2/3/4)

•

HP BFWP discharge header pressure (P0NAB02CP105)

•

HP BFW pressure at metering station (P0NAB02CP151/2)

Temperat ure Elements (TE) •

O & M Manual

MBFP & TBFP Booster pump suction temperature (P0LAB11CT001/2/3/4/5)

•

BFPT inlet HP steam supply temperature (P0LBR01CT001)

•

BFPT Exhaust steam temperature (P0LBE11CT001/2/3)

•

HHP BFW temperature at metering station (P0NAB03CT051/2)

•

HP BFW temperature at metering station (P0NAB02CT051/2)

•

HP1 Heater inlet water temperature (P0LAB12CT001/2/3)

•

HP2 Heater inlet water temperature (P0LAB21CT001/2/3)

•

HP2 Heater outlet water temperature (P0LAB41CT001/2/3)

•

HP1 Heater drain temperature (P0LCH01CT001/2/3)

•

HP2 Heater drain temperature (P0LCH02CT001/2/3) System Description

SD-01



Rev. A

Level Ind icating Transm itters/Le vel Trans mitters (LIT/LT) •

HP1 Heater level (P0LAD01CL101/2/3/4/5/6)

•

HP2 Heater level (P0LAD02CL101/2/3/4/5/6)

Flow Ind icating Transm itters (FIT) •

MBFP & TBFP discharge flow (P0LAB12CF101/2/3/4/5)

•

HHP BFWP discharge flow (P0NAB03CF101/2/3)

•

•

•

•

HHP BFW flow to (P0NAB03CF151/2/3/4)

Partner

at

metering

station

HP BFWP discharge flow (P0NAB02CF101/2/3/4) HP BFW flow to (P0NAB02CF151/2/3/4)

Partner

at

metering

station

HP Steam flow to BFPT (P0LBR01CF101/2/3)

Differen tial Pressure Transm itters (DPIT)

7.1.2

•

MBFP & TBFP-BP suction strainer DP (P0LAB11CF501/2/3/4/5)

•

HHP BFWP suction strainer DP (P0NAB03CF501/2/3)

•

HP BFWP suction strainer DP (P0NAB02CF501/2/3/4)

Local Indicators Pressure Indicato rs (PI)

O & M Manual

•

MBFP & TBFP-BP suction pressure (P0LAB11CP301/2/3/4/5)

•

MBFP & TBFP-BP discharge pressure (P0LAB11CP306/7/8/9/10)

•

HHP BFWP suction pressure (P0NAB03CP301/2/3)

•

HHP BFWP discharge pressure (P0NAB03CP304/5/6)

•

HP BFWP suction pressure (P0NAB02CP301/2/3/4)

•

HP BFWP discharge pressure (P0NAB02CP305/6/7/8)

•

HP1 Heater shell side pressure (P0LAD01CP301/2/3)

•

HP2 Heater shell side pressure (P0LAD02CP301/2/3)

System Description

SD-01

Section 7 – Instrumentation, Instrumentat ion, Alarm and Trip Set Points


Rev. A

Level Indic ators (LI) (LI)

O & M Manual

•

HP1 Heater level (P0LAD01CL301/2/3) (P0LAD01CL301/ 2/3)

•

HP2 Heater level (P0LAD02CL301/2/3) (P0LAD02CL301/ 2/3)

System Description

SD-01


7.2


Rev. A

Alarm & Trip Set Points The instrumentation shown under is provided in the Boiler Feed Water System to perform alarm and trip/protection functions of the system through the DCS operator workstations. TABLE 7-1 ALARM & TRIP SET POINTS

Instrument Tag No

Description

P0LAA01CL101/103/ 105

Deaerator A/B/C Level Perm.

>NWL ± 0mm

High Low Low-Low

>NWL+200mm
P0LAB12CP106 P0LAB12CP106

P0LAC02CL471/472 P0LAC02CL471/47 2 P0LAC02CP471/474 P0LAC02CP471/ 474

P0LAC02CP472/475 P0LAC02CP472/ 475

P0LAC02CP473/476 P0LAC02CP473/ 476

P0LAC02CP811/812 P0LAC02CP811/ 812

O & M Manual

Set Point

Function

MBFP, TBFP, HHP & HP BFWP start permit Alarm Alarm MBFP, TBFP, HHP BFWP & HP BFWP trip.

BFP Disch. Feed Water Pr. 2

Interlock

<121kg/cm

Interlock

<121kg/cm

Low

<116kg/cm

MBFP-A/B Oil Tank Level Low

<250mm

MBFP-A/B Lube Oil Pressure Normal.

>1.2kg/cm

MBFP-A/B Lube Oil Pressure Low

2

2

Alarm, first MBFP MBFP add on during normal operation Alarm, second second MBFP add on during normal operation Alarm, any BFP BFP start-up during normal operation

Alarm 2

MBFP-A/B start permit

<0.9kg/cm

2

Alarm & standby lube oil pump start

MBFP-A/B Lube Oil Pressure Low-Low

<0.5kg/cm

2

MBFP-A/B trip

MBFP-A/B Lube Oil Filter DP High

>0.6kg/cm

2

Alarm

System Description

SD-01



Rev. A

CONTINUED… TABLE 7-1 ALARM & TRIP SET POINTS (CONT’D) Instrument Tag No P0LAC02CT471/479

P0LAC02CT472/480

P0LAC02CT411/413 P0LAC02CT411/ 413

P0LAC02CT473/481 P0LAC02CT473/ 481

P0LAC02CT474/482 P0LAC02CT474/ 482

P0LAC02CT475/483 P0LAC02CT475/ 483

P0LAC02CT476/484 P0LAC02CT476/ 484

P0LAC02CT477/485 P0LAC02CT477/ 485

P0LAC02CT478/486 P0LAC02CT478/486

P0LAC02CT412/414 P0LAC02CT412/4 14

P0LAB11CP504/505 P0LAB11CP504/ 505

P0LAB12CF104/105 P0LAB12CF104/10 5

P0LAB11CT004/005

P0LAB12CP104/105 P0LAB12CP104/ 105

O & M Manual

Description

Set Point

MBFP-A/B NDE Brg.Temp. High

>95 C

MBFP-A/B DE Brg.Temp. High

>95 C

MBFP-A/B Thrust Brg.Temp. High

>95 C

Function

o

Alarm

o

Alarm

o

Alarm

MBFP-A/B STU Gear HSP Shaft Coupling. End Brg.Temp. High

>95 C

MBFP-A/B STU Gear HSP Shaft Free End Brg.Temp. High

>95 C

MBFP-A/B STU Gear LSP Shaft Free End Brg.Temp. High

>95 C

MBFP-A/B STU Gear LSP Shaft Coupling End Brg.Temp. High

>95 C

o

Alarm o

Alarm o

Alarm o

Alarm

MBFP-A/B BP DE Brg.Temp. High

>95 C

MBFP-A/B BP NDE Brg.Temp. High

>95 C

MBFP-A/B BP Thrust Brg.Temp. High

>95 C

MBFP-A/B BP Inlet Strainer DP High

>0.25kg/cm

MBFP-A/B Disch Feed water Flow High Low Low-Low

>1,760t/h <281t/h <250t/h

MBFP-A/B BP Inlet Dea.Feed Water Temperature High

>165 C

MBFP-A/B Disch Feed Water Pressure High

>220kg/cm

o

Alarm

o

Alarm

o

Alarm 2

Alarm

Alarm Alarm Alarm, MBFP trip

o

Alarm

2

Alarm

System Description

SD-01



Rev. A

CONTINUED… TABLE 7-1 ALARM & TRIP SET POINTS Instrument Tag No

Description

P0LAC02CT471-472 /479-480

MBFP-A/B Motor Brg. Temp.High

>95 C

P0LAC02CT053-055 / 063-065

MBFP-A/B Motor Winding Temperature High High-High

>125 C o >135 C

P0LAB11CP501/502/ 503

TBFP-A/B/C BP Inlet Strainer DP High

>0.25kg/cm

P0LAB12CF101/102/ 103

TBFP-A/B/C Disch Feed water Flow High Low Low-Low

>1,760t/h <281t/h <250t/h

TBFP-A/B/C BP Inlet Dea. Feed Water Temp. High

>165 C

o

Alarm

P0LAC01CT471/475/ 479

TBFP-A/B/C DE Brg. Temp.High

>95 C

o

Alarm

P0LAC01CT472/476/ 479

TBFP-A/B/C NDE Brg. Temp.High

>95 C

o

Alarm

P0LAC01CT473/477/ 481

TBFP-A/B/C BP NDE Brg. Temp.High

>95 C

o

Alarm

P0LAC01CT474/478/ 482

TBFP-A/B/C BP DE Brg. Temp.High

>95 C

o

Alarm

P0LAC01CT411/413/ 415

TBFP-A/B/C Thrust Brg. Temp.High

>95 C

o

Alarm

P0LAC01CT412/414/ 416

TBFP-A/B/C BP Thrust Brg. Temp.High

>95 C

o

Alarm

P0XAV01CP201/211 /221

BFPT Lube Oil Pr.

P0LAB11CT001/002/ 003

Low

O & M Manual

Set Point

o

Alarm

o

Alarm Alarm & MBFP trip

2

<0.8kg/cm

Function

Alarm

Alarm Alarm Alarm M/T BFP and TBFP BP trip

2

TBFP BP permit

System Description

SD-01



Rev. A


Description

Set Point

Function

P0LAC01CL471/472/ 473

TBFP-A/B/C BP Return Oil Tank Level Low High High-High

>0mm(27litres) >120mm(63litres) >120mm(100litres)

Return Oil Pump OFF Return Oil Pump ON Alarm,Add on Pump ON

TBFP-A/B/C BP Motor Winding Temperature High High-High

>130 C o >140 C

HHP BFWP-A/B/C Disch. Feed Water Pr. High

>210kg/cm

HHP BFWP-A/B/C Inlet Strainer DP High

>0.2kg/cm

HHP BFWP-A/B/C Disch.Water flow High Low Low-Low

>600t/h <104.8t/h <95t/h

HHP BFWP-A/B/C Outlet. Feed Water Pr. Interlock

<140kg/cm

Low -Low

<129kg/cm

Alarm, add second pump on Alarm,

P0NAB03CL471/472 /473

HHP BFWP-A/B/C Lube Oil Tank Level Low

<200mm

Alarm

P0NAB03CP811/812 /813

HHP BFWP-A/B/C Lube Oil Duplex Filter DP High

>0.6kg/cm

P0NAB03CP471/474 /477

HHP BFWP-A/B/C Lube Oil Pr. Perm.

>1.2kg/cm

P0NAB03CP472/475 /478

HHP BFWP-A/B/C Lube Oil Pr. Low

P0LAC01CT053-055 / 063-065 / 073-075

P0NAB03CP101-103

P0NAB03CP501-503 P0NAB03CF101/102 /103

P0NAB03CP104

P0NAB03CP473/476 /479 P0NAB03CT471/473 /475 O & M Manual

o

Alarm TBFP BP and TBFP trip

2

2

Alarm Alarm

Alarm Alarm Alarm, HHP BFWP trip

2

2

2

Alarm

2

HHP BFWP Start Permit

<0.9kg/cm

2

Alarm, Standby Lube Oil Pump Start

HHP BFWP-A/B/C Lube Oil Pr Low-Low

<0.5kg/cm

2

HHP BFWP trip

HHP BFWP-A/B/C NDE Brg. Temp.High

>95 C

o

Alarm System Description

SD-01



Rev. A


Description

P0NAB03CT472/474 /476

HHP BFWP-A/B/C DE Brg. Temp.High

>95 C

P0NAB03CT411/412 /413

HHP BFWP-A/B/C Thrust Brg. Temp.High

>95 C

P0NAB03CT061-062 / 071-072 / 081-082

HHP BFWP-A/B/C Motor DE-NDE Brg. Temperature High

>95 C

HHP BFWP-A/B/C Motor Winding Temp. High High-High

>130 C o >140 C

HP BFWP-A/B/C/D Disch.Feed Water Pr. High

>96kg/cm

HP BFWP-A/B/C/D inlet Strainer DP High

>0.20kg/cm

HP BFWP-A/B/C/D Disch.Water Flow High Low Low-Low

>640t/h <104.8t/h <95t/h

HP BFWP-A/B/C/D Outlet Feed Water Pr. High Interlock Interlock Low-Low

>90.6kg/cm 2 <60kg/cm 2 <58kg/cm 2 <58kg/cm

Alarm Alarm, one pump add on Alarm, two pump add on Alarm,

P0NAB02CL471/472 /473/474

HP BFWP-A/B/C/D Oil Tank Level Low

<200mm

Alarm

P0NAB02CP811/812 /813/814

HP BFWP-A/B/C/D Lube Oil Duplex Filter DP High

>0.6kg/cm

HP BFWP-A/B/C/D Lube Oil Pressure Perm. HP BFWP-A/B/C/D Lube Oil Pressure Low

P0NAB03CT063-065 / 073-075 / 083-085

P0NAB02CP101/102 /103/104

P0NAB02CP501/502 /503/504 P0NAB02CF101/102 /103/104

P0NAB02CP105

P0NAB02CP471/474 /477/480 P0NAB02CP472/475 /478/481

O & M Manual

Set Point

Function

o

Alarm

o

Alarm

o

Alarm

o

Alarm HHP BFWP trip

2

Alarm

2

Alarm

Alarm Alarm Alarm, Pump Trip

2

2

Alarm

>1.2kg/cm

2

HP BFWP Start permit

<0.9kg/cm

2

Alarm, standby lube oil um start

System Description

SD-01



Rev. A

CONTINUED… TABLE 7-1 ALARM & TRIP SET POINTS Instrument Tag No P0NAB02CP473/476 /479/482

Description

Set Point

HP BFWP-A/B/C/D Lube Oil Pr. Low-Low

<0.5kg/cm

P0NAB02CT061-062 / 071-072 / 081-082 / 091-092

HP BFWP-A/B/C/D Motor DE-NDE Brg.Temp.High

>95 C

P0NAB02CT063-065 / 073-075 / 083-085 / 093-095

HP BFWP-A/B/C/D Motor WindingTemp. High High-High

>130 C o >140 C

P0NAB02CT471/473 /475/477

HP BFWP-A/B/C/D NDE Brg. Temp.High

>95 C

P0NAB02CT472/474 /476/478

HP BFWP-A/B/C/D DE Brg. Temp.High

>95 C

P0NAB02CT411/412 /413/414

HP BFWP-A/B/C/D Thrust Brg. Temp.High

P0LCH01CT001/002 /003

HP1 Heater- A/B/C Drain Temp.High

>230 C

P0LAB12CL001/002/ 003

HP1 Heater- A/B/C Inlet Feed Water Temp.High

>165 C

P0LCH02CT001/002 /003

HP2 Heater- A/B/C Drain Temp.High

>262 C

P0LAB21CT001/002/ 003

HP2 Heater- A/B/C Inlet Feed Water Temp.High

>193 C

HP2 Heater- A/B/C Outlet Feed Water Temp.High

P0LAB41CT001/002/ 003

P0LAD01CL101/103/ 105

O & M Manual

2

o

o

Function

HP BFWP trip

Alarm

Alarm HP BFWP Trip

o

Alarm

o

Alarm

>95 C

o

Alarm

o

Alarm

o

Alarm

o

Alarm

o

Alarm

>247 C

o

Alarm

HP1 Heater- A/B/C Level High-High

>NWL+250mm

High

>NWL+150mm

Low

Alarm, HP STM INL MOV/MP STM INL MOV/ HP1HTR INL MOV/ HP2HTROUT MOV close Alarm, Emergency drain CV open Alarm

System Description

SD-01



Rev. A

CONTINUED… TABLE 7-1 ALARM & TRIP SET POINTS Instrument Tag No P0LAD02CL101/103/ 105

Description HP2 Heater- A/B/C Level High-High

Set Point

>NWL+250mm

Alarm, HP STM INL MOV/MP STM INL MOV/ HP1HTR INL MOV/ HP2HTROUT MOV close Alarm, Emergency drain CV open Alarm

MBFP-A Brg.Vibration (DE&NDE) High High-High

>48µm p-p >100µm p-p

Alarm Alarm

MBFP-B Brg.Vibration (DE&NDE) High High-High


Alarm Alarm

HHP BFWP-A Brg.Vibration (DE&NDE) High High-High


Alarm Alarm

HHP BFWP-B Brg.Vibration (DE&NDE) High High-High


Alarm Alarm

HHP BFWP-C Brg.Vibration (DE&NDE) High High-High


Alarm Alarm

HP BFWP-A Brg.Vibration (DE&NDE) High High-High


Alarm Alarm

High >NWL+150mm Low

P0LAC02CY001/002

P0LAC02CY003/004

P0NAB03CY001/002

P0NAB03CY003/004

P0NAB03CY005/006

P0NAB02CY001/002

O & M Manual

Function

System Description

SD-01

SD-01 DM16-MN-LAB-PM0-10100 RA Boiler Feed Water System

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