ALFA LAVAL Desalination Plant Type TVC-6-6000
ALFA LAVAL Desalination Plant Type TVC-6-6000
Table of Contents:
1 2 3 4 5 6
Design Basis Alfa Laval Scope of Supply Construction Standards Performance Test Procedure Performance Criteria for Alfa Laval TVC Desalination Desalination Units Process Description for Alfa Laval TVC Desalination Units
ATTACHMENTS: DOCUMENTS: Doc. no. TVC-6000-8-LP-51 TVC-6000-8-LP-51
Design and Performance Data
ALFA LAVAL Desalination Plant Type TVC-6-6000
1. DESIGN BASIS
Please refer to Document no.: TVC-6000-8-LP-51. 2. ALFA LAVAL SCOPE OF SUPPLY
Item
Qty.
Description
01
1
ALFA LAVAL desalination plant, Type: TVC-6-6000 Nominal production capacity: 6000 m³/24 hours Each plant includes all necessary equipment, as detailed below:
Each desalination plant consists of the following for field assembly by others: 1
Automatic filter 500 µm mesh, for filtration of evaporator feed flow.
ALFA LAVAL Desalination Plant Type TVC-6-6000
2. ALFA LAVAL SCOPE OF SUPPLY (continued) Item
Qty.
Description
1
Set of distillate piping in 316L SST, in accordance with DIN norms and flange pressure rating PN 10. Supplied in spool pieces with fields welds at site by others.
1
Set of steam piping in carbon steel (CS), in accordance with DIN norms and flange pressure rating PN 16. Supplied in spool pieces with fields welds at site by others.
1
Vacuum system consisting of steam-ejector system.
1
Set of Instruments in accordance with Alfa Laval’s standard vendor list.
1
Set of Valves in accordance with Alfa Laval’s standard vendor list.
ALFA LAVAL Desalination Plant Type TVC-6-6000
3. CONSTRUCTION STANDARDS As per Alfa Laval’s standard specifications wherever applicable, otherwise according to the following : 1) 2) 3) 4)
Quality assurance based on Alfa Laval’s certified ISO 9001 system. Electrical equipment and components based on IEC standards. Piping in accordance with DIN norms. Design standard for vessels is in accordance to ASME VIII, Div.1, Sect. 1, with design pressure of 0 BarG.
4. PERFORMANCE TEST PROCEDURE After successful commissioning, a performance test will be conducted in accordance with Alfa Laval’s standard test procedure. The Performance Test will have a total duration of 24 hours with the desalination unit operating at design parameters. During performance test following operation
ALFA LAVAL Desalination Plant Type TVC-6-6000
5. PERFORMANCE CRITERIA FOR ALFA LAVAL TVC DESALINATION UNITS The desalination system has been designed according to the parameters outlined in the foregoing sections, however, the performance of the system is also subject to the following criteria: a)
Raw water supply shall be seawater with a concentration of no more than 4.5%. The sea water shall, be pre-filtered by the customer to remove suspended solids larger than 0.5 mm. Further, the seawater used shall not contain pollutants, such as oil, fat, detergents, organic matters, microorganisms, algae, humic matter, mud, clay, sand, etc. Generally the allowance of such undesirable matter shall not surpass a content in the raw water supply that results in a fouling factor of the heat transfer surfaces higher than 15% of the normal practice within international desalination engineering practice. Moreover, the seawater supply shall not contain corrosive substances or gases such as H 2S, free Chlorine, Fluorine, etc. higher than stated in the specification or other substances which can alter the physical-chemical properties of the raw water.
ALFA LAVAL Desalination Plant Type TVC-6-6000
6. PROCESS DESCRIPTION FOR ALFA LAVAL TVC DESALINATION UNITS Vapour compression refers to a distillation process where the evaporation of seawater is achieved by the application of heat from the condensation of a compressed vapour. Compression of the water vapour in the TVC type plant is by utilizing a steam jet ejector driven by live steam, provided from an external source, at pressures typically between 3.0 to 20.0 bar(g). The steam jet ejector recycles a portion of the vapour produced in the cold end of the desalination process, increases its pressure and temperature and then discharges this mixture as the heating media in the hot end of the desalination plant Thermo-Vapour Compression (TVC) is an effective method of increasing energy efficiency in the distillation process. In multiple-effect seawater desalination, the evaporation and condensation processes take place in different chambers of the desalination unit, called effects . Seawater is evaporated in one effect and this vapour condensed in the subsequent effect at a lower pressure and temperature. The vapour produced in one effect becomes the heating media in the subsequent effect by yielding its latent heat of condensation. The remainder of the vapour produced in the last effect is condensed in a main condenser, which is typically cooled by seawater.
ALFA LAVAL Desalination Plant Type TVC-6-6000
6. PROCESS DESCRIPTION FOR ALFA LAVAL TVC DESALINATION UNITS (continued) The transport of fluids, such as vapour, distillate water and brine, within the evaporator is done by the pressure differential created between effects. The effect number one, which operates at the highest temperature (called hot end) has the highest pressure, the subsequent effects have lower temperature and pressure. This pressure differential is maintained throughout all the effects of the plant. The last effect is the one operating at the lowest temperature and pressure, therefore also called the cold end. The condensate or distillate produced in each effect is transported and collected in the last effect, where it is extracted by means of a centrifugal pump. The remaining seawater that was not evaporated (called brine) is cascaded down the effects and collected in the last effect, where it is discharged by means of a centrifugal pump. The evaporation process takes place at temperatures typically between 70 °C in the hot end and 45 °C in the cold end. Because the evaporation is done at sub-atmospheric conditions, vacuum is created by means of an ejector system, (driven by steam or water depending on plant size), which during start-up evacuates the air from the system, and during operation, maintains the vacuum by extracting the non-condensable gases. Those are discharged back to the sea together with the seawater coolant from the main condenser .
ALFA LAVAL Desalination Plant Type TVC-6-6000
ATTACHMENTS: DOCUMENTS: Doc. no. TVC-6000-8-LP-51 TVC-6000-8-LP-52 TVC-6000-8-LP-53 TVC-6000-8-LP-54 TVC-6000-8-LP-55 TVC-6000-8-LP-57 TVC-6000-8-LP-58 TVC-6000-8-LP-59 TVC-6000-8-LP-61 TVC-6000-8-LP-62 TVC-6000-8-LP-70 DRAWINGS:
Design and Performance Data Utilities Connections Pump and Motor Data Electrical Component Data Dimension, Weight and Shipping Data - Provisional Spare parts for 2 years Operation Spare parts for Commissioning Consumables for 3 Month Operation Document List Vendor List Heat and Mass Balance
Product type: Doc. Title: Std. Doc. No: Revision:
TVC-6-6000 ( Thermo Vapour Compression System ) Design and Performance Data ( per unit ) TVC-6000-8-LP-51 Date: Made: Reviewed: Approved: 27-08-2003 AMA JBN BJA 00
Design Parameters Capacity per unit Raw water composition Raw water salinity (%) Brine disposal Site Altitude Ambient Temperature Type of installation Heating energy Performance Data Distillate: Flow TDS Pressure Temperature (nominal) Sea water: Supply flow Supply pressure Temperature (min/max) Brine/cooling water blow-down: Fl
Value 3
Min. /Max.
6.000 m /day "Std. Seawater" 3,5 - 4,5 Back to sea +/-5 m a.s.l. o + 10 / 40 C Out-doors Saturated Steam Value 250,00 < 10 2,0 45
t/h ppm (mg/l) bar (g) o C
2.200,0 3,5 18 - 35
t/h bar (g) o C
1 950 0
t/h
Comments Net as distillate
Comments
Product type: Doc. Title: Std. Doc. No: Revision:
TVC-6-6000 ( Thermo Vapour Compression System ) Design and Performance Data ( per unit ) TVC-6000-8-LP-51 Date: Made: Reviewed: Approved: 27-08-2003 AMA JBN BJA 00
Performance: Gain Output Ratio (GOR) Gain Output Ratio (GOR) Control air supply Electric Power supply: Voltage Frequency Electrical Consumption Nominal Installed Electrical Load Specific Electrical Consump. Nominal Specific Electrical Consump. Guaranteed Consumables: Antiscalant consumption (ALTREAT 400)
8,1 7,8 4,0
kg/kg kg/kg 3 m /h
Flowdist/Flowsteam(thermocomp.) Flowdist/Flowsteam(total) Min press. 7 bar (g)
400 50 130 219 0,52 0,62
V Hz kW kW 3 kW/m 3 kW/m
Other voltage available Other frequency available
6-8
g/m
3
Based on distillate flow Based on distillate flow Alfa Laval ALTREAT 400
Product type: TVC-6-6000 ( Thermo Vapour Compression System ) Doc. Title: Utilities Connections ( per unit ) Std. Doc. No: TVC-6000-8-LP-52 Date: Made: Reviewed: Approved: 27-08-2003 AMA JBN BJA Revision: 00 Piping Connections Seawater supply Blow Down and Cooling water Distillate and Condensate discharge Heating Steam Input [ T/h ] Venting Steam Input [ T/h ] Venting Condensate, drain Drains Control Air, dry Elec. Power Connections Control & MCC Panel, 3P and 1N Earthing, connection to existing installation (*) Connections according to DIN standard
Connection Pressure at Nom. D B.L. bar (g) mm (*) 650 3,5 600 1,0 250 2,0 300 2,5 50 14,0 25 0,0 50 0,0 25 7,0 Quantity 1 1
Flow 3
m /h
Temp. o
C
2200,0 1950,0 280,7 30,73 1,30 0,2
18 - 35 42 - 46 45 Saturated 234 65
4,0
Installed Power kW 219
Voltage V
Req. Power kW
3 x 400
130
Product type: Doc. Title: Std. Doc. No: Revision: Pump No. Quantity Number Pump Type Norm Medium 3 Gravity (nominal) kg/m o Temperature C Salinity % 3 Flow, nominal m /h Head m W.C. NPSH m W.C. Pump Eta % Motor Speed r.p.m. Efficiency % Power absorbed kW Power consumed kW Motor rating kW **) Start-up condition
Subject to revision
TVC-6-6000 ( Thermo Vapour Compression System ) Pump and Motor Data ( per unit ) Date: Made: TVC-6000-8-LP-53 27-08-2003 00 PU2 Blow down 1 Centrifugal ISO / EN S.W. conc. 1.033 42 - 46 6,0 652,9 25 3,5 60%
PU2 **) Blow down 1 Centrifugal ISO / EN S.W. 1.024 18 - 35 3,5 - 4,5 902,9 25 3,5 60%
PU3 Distillate 1 Centrifugal ISO / EN Distillate 990 45 < 10 ppm 280,7 35 3,5 60%
1.500 95% 76,6 80,6 160,0
1.500 95% 105,0 110,5 160,0
1.500 94% 44,2 47,0 57,0
Reviewed:
Approved:
AMA
JBN
BJA
PU4 Not used
PU5 Not used
PU6 Not used
Page 1 of 1
Product type: Doc. Title: Std. Doc. No: Revision: Type
Description
TVC-6-6000 ( Thermo Vapour Compression System ) Electrical Components Data ( per unit ) TVC-6000-8-LP-54 00 Quantity
Power rating kW
Blow Down 160,00 1 Pump Distillate 57,00 Motor 1 Pump Chem. 0,50 Motor 1 Dosing Electrical 1,50 Panel 1 Panel TOTAL POWER INSTALLED FOR DESALINATION UNIT Motor
TOTAL POWER CONSUMED FOR UNIT IN OPERATION
Subject to revision
Power installed kW
Voltage/Freq. V / Hz
Date:
Made:
27-08-2003
Reviewed:
AMA
JBN
Nom. Current Peak Current Protection Amp. Amp
Approved:
BJA
Insulation
160,00
3 x 400 / 50
265,4
2.123,6
IP 55
F
57,00
3 x 400 / 50
94,6
756,5
IP 55
F
0,50
230 / 50
2,7
21,7
IP 55
F
1,50
3 x 400 / 50
-
-
-
-
219
3 x 400 / 50
130
3 x 400 / 50
Page 1 of 1
Product type: Doc. Title Std. Doc. No: Revision:
TVC-6-6000 ( Thermo Vapour Compression System ) Dimension, Weight and Shipping Data - Provisional ( per unit ) TVC-6000-8-LP-55 Date: Made: Reviewed: Approved: AMA JBN BJA 27-08-2003 00 Shipping Data
Component Evaporator Condenser 40 feet container (*)
Consignment Total Weight Total Volume 3) Weight (ton) (ton) (m
No. of consignment
Dimension lxwxh (m)
3
19 x 5 x 5
50,00
150,00
180
12.2 x 2.4 x 2.6
30,48
60,96
155
211
335
Incl. in Evaporator 2
SUMMATION (*) Maximum Weight of container
Dimension & Weight Dimension Total Length
m
ton
56,0
Approx. Weight Empty
188
Total Width
6,0
Water filled
697
Total Height
7,0 2,0
In operation
252
Service area around unit
Length
Product type: Doc. Title: Std. Doc. No: Revision: Tag No.
TVC-6-6000 ( Thermo Vapour Compression System ) Spare Parts for 2 years operation ( per unit ) TVC-6000-8-LP-57 Date: Made: Reviewed: 27-08-2003 AMA JBN 00 Description Quantity Article No.
PU2 TVC-6-6000-PU2-001 TVC-6-6000-PU2-002 TVC-6-6000-PU2-003 TVC-6-6000-PU2-004 PU3 TVC-6-6000-PU3-001 TVC-6-6000-PU3-002 TVC-6-6000-PU3-003 TVC-6-6000-PU3-004 CO TVC-6-6000-CO-001 TVC-6-6000-CO-002 VE TVC-6-6000-VE-001 TVC-6-6000-VE-002 CR TVC-6-6000-CR-001 TVC-6-6000-CR-002 EW
Blow Down Pump Mechanical seal Set of Gaskets Set of motor Bearings Set of wear rings Distillate Pump Mechanical Seal Set of Gaskets Set of motor Bearings Set of wear rings Main Condenser Set of Anodes Set of Gaskets Vessel Set of Gaskets for man holes Set of Anodes Thermo compressor Desuperheater nozzle Set of Gasket Evacuation Ejector
1 1 1 1 1 1 1 1 2 2 2 2 1 1
Approved:
BJA
Notes
Product type: Doc. Title: Std. Doc. No: Revision: Tag No.
TVC-6-6000 ( Thermo Vapour Compression System ) Spare Parts for 2 years operation ( per unit ) TVC-6000-8-LP-57 Date: Made: Reviewed: 27-08-2003 AMA JBN 00 Description Quantity Article No.
MC TVC-6-6000-MC-001 TVC-6-6000-MC-002 TVC-6-6000-MC-003 PA TVC-6-6000-PA-001 TVC-6-6000-PA-002 TVC-6-6000-PA-003 FF TVC-6-6000-FF-001 TVC-6-6000-FF-002 TVC-6-6000-FF-003 CM TVC-6-6000-CM-001
MCC (if applicable) Set of Aux. Relays Set of Bulbs Circuit Breaker Control Panel PLC battery PLC digital input card PLC digital output card Feed water filter Filter basket element Set of Gaskets Drain Valve Conductivity Meter Cond. Electrode element
1 1 1 1 1 1 1 1 1 1
Approved:
BJA
Notes
Product type: Doc. Title: Std. Doc. No: Revision: Tag No.
TVC-6-6000 ( Thermo Vapour Compression System ) Spare Parts for Commissioning ( per unit ) TVC-6000-8-LP-58 Date: Made: Reviewed: 27-08-2003 AMA JBN 00 Description Quantity Article No.
PU2 TVC-6-6000-PU2-001 TVC-6-6000-PU2-002 PU3 TVC-6-6000-PU3-001 TVC-6-6000-PU3-002 CO TVC-6-6000-CO-001 VE TVC-6-6000-VE-001 CR TVC-6-6000-CR-001 EW TVC-6-6000-EW-001 CU TVC-6-6000-CU-001 TVC-6-6000-CU-002 VA1 TVC-6-6000-VA1-001
Blow Down Pump Mechanical seal Set of Gaskets Distillate Pump Mechanical Seal Set of Gaskets Main Condenser Set of Gaskets Vessel Set of Gaskets for man holes Thermo compressor Set of Gasket Evacuation Ejector Set of Gaskets Antiscalant Dosing Unit Injection nozzles Set of Gaskets Control valve Solenoid valve
1 1 1 1 1 1 1 1 1 1 1
Approved:
BJA
Notes
Product type: Doc. Title: Std. Doc. No: Revision: Consumable
TVC-6-6000 ( Thermo Vapour Compression System ) Consumables for 3 month operation ( per unit ) TVC-6000-8-LP-59 Date: Made: Reviewed: Approved: 27-08-2003 AMA JBN BJA 00 Type
Antiscalant ALTREAT 400 Dechlorination (**) Sodium Metha Bisulfite Cleaning agent (*) Sulfamic acid Grease For pump motors (*) Data for one year, others for 3 months (**) Only when free Chlorine in feed water is higher than 0.5 ppm.
Quantity kg Normal 15.602 0 2.238 1
Product type: Doc. Title: Std. Doc. No: Revision: Document Title
TVC-6-6000 ( Thermo Vapour Compression System ) Document List TVC-6000-8-LP-61 Date: Made: Reviewed: Approved: 27-08-2003 AMA JBN BJA 00 Comments
Quality Plan Inspection & Test Plan Monthly Progress Report Monthly Project Schedule Process Flow Diagram (PFD) Piping & Instrument Diagram (PID) Equipment List Foundation Plan Valve List Instrument List General Arrangement Transport & Lifting Drawing (if applicable) Single Line Drawing (electric) Wiring Diagram Erection Manual O & M Manual
Product type: Doc. Title: Std. Doc. No: Revision: Equipment Item Pumps Motors Thermocompressor Vacuum System Filters Manual Valves Check Valves Control Valves Pressure Transmitters Temperature Transmitters Thermometers Pressure Gauges Level Transmitters Conductivity Analyser PLC I/P Positioner
TVC-6-6000 ( Thermo Vapour Compression System ) Vendor List TVC-6000-8-LP-62 Date: Made: Reviewed: Approved: 27-08-2003 AMA JBN BJA 00 Vendor FAPMO, KSB ABB, Siemens Korting, Croll Reynolds Progetti, Korting, Croll Reynolds Alfa Laval Alfa Laval std. Alfa Laval std. Alfa Laval std., Spirax Endress Hauser Endress Hauser WIKA WIKA Endress Hauser, Klinger Endress Hauser Allen Bradley SLC Siemens
Venting Steam 4
1,30 t/h
Vent + Vapour
234,00 °C
0,013 t/h NCG
15,00 bar
65,00 °C
Radiation Losses
Venting Condensate
8
0,180 t/h 65,00 °C
Motive Steam
Suction Steam Rest Steam
30,73 t/h
Seawater
Saturated °C
Make-up Seawater
3,50 bar
1
2200,00 t/h
Condenser ( 2 )
Evaporator ( 3 )
18 - 35 °C 3,5 - 4,5 %TDS
7
Heating Steam
Seawater Return Distillate Capacity: G.O.R.: No. Effects TVC:
6000 8,1 6
t/day
Item Description Thermo-Compressor 1 Condenser 2 Evaporator 3 Vacuum System 4 Distillate pump 5 Brine Blow down pump 6 Make-up filter 7 Anti-Scalant dosing unit 8 MCC & Control Panel 9
Brine Out
Seawater/Brine 1950,0 t/h 42 - 46 °C
Tag CR CO EV EW PU3 PU2 FF CU MC & PA
9
6
Distillate incl. Condensate
5
45,00 °C
= Limit
Heat & Mass Balance TVC-6-6000 ( Thermo Vapour Compression System )
of Scope of Supply
Made: AMA Reviewed: JBN Approved: BJA Std. Doc. No:
Subject to revision
6.738 t/day 280,73 t/h
TVC-6000-8-LP-70
Page 1 of 1
