Bucket Elevator

Tanj njun ung g Ja J ati B Tr Tr ain inii ng B UC UCK K ET EL EL EV EVA A TO TOR R

LIMESTONE CONVEYING SYSTEM BUCKET ELEVATOR

Tanjung Jati B Training

PT Central Java Power Tanjung Jati B Units 1 & 2 Flue Gas Desulfurization (FGD) System

Ab so rber Ar ea

Dewater ing Ar ea

Reagent Preparatio n Ar ea

Limeston e Jetty An d Con veyo r


Limestone Conveying System Bucket Elevator In order to get the Limestone from ground level to the top of the Limestone Silos, a single continuous operating, chain-driven Bucket Elevator is provided. The Bucket Elevator , which operates at a design speed of 120 feet per minute or 37 meter/minute, is located on the north side of the two silos.


Limestone Conveying System Bucket Elevator

NOTE LIMESTONE BUCKET ELEVATOR BETWEEN THE SILOS (UNDER CONSTRUCTION)

VIBRATING FEEDER LIMESTONE SILOS (VIEW LOOKING NORTH) Tanjung Jati B Training


BUCKET ELEVATOR

PLANT NORTH

LIMESTONE REVERSING CONVEYOR Tanjung Jati B Training

Limestone Conveying System Bucket Elevator Located within the Elevator Housing there are 342 individual buckets which transport the Limestone to the top of the Elevator. The Bucket Drive Assembly, which can operated at various speeds, is located at the top of the Bucket Elevator Housing.


Limestone Conveying System Bucket Elevator ELEVATOR DRIVE ASSEMBLY LADDER DISCHARGE CHUTE DRIVE CHAIN ASSEMBLY REVERSING CONVEYOR

ELEVATOR EXTERNAL CASING

TOP OF BUCKET ELEVATOR (LOOKING WEST) Tanjung Jati B Training

Limestone Conveying System Bucket Elevator Similar to the Stockout Conveyor, the Bucket Elevator also utilizes a Vibrating Feeder of similar design. A Front End Loader is used to get the Limestone from the Storage Pile to the Vibrating Feeder.



FRONT END LOADER



HOPPER

BUCKET ELEVATOR VIBRATING FEEDER

INLET CHUTE

BOTTOM OF BUCKET ELEVATOR (LOOKING WEST) Tanjung Jati B Training

Limestone Conveying System Bucket Elevator ELEVATOR CASING

SPROCKET ASSEMBLY INLET CHUTE

BUCKET

BUCKET

BUCKET ELEVATOR (PLAN VIEW)



Control of the Bucket Elevator is completely independent of the DCS. The only indication the DCS receives is operating status, “ On/Off” . The Bucket Elevator can be started or stopped from the conveying system PLC via “ Start” and “ Stop” pushbuttons.



At ground level next to the Bucket Elevator there is a local control box with a Selector Switch with the following opt ions…

Jog-Off-Remote Jog – Spring loaded switch to run the elevator for short periods of time. Off – Stops Elevator Remote – Allows start from PLC.


Limestone Conveying System Bucket Elevator Starting the Bucket Elevator… • The Reversing Conveyor must be operating • No Bucket Elevator alarms are present (for example, elevator discharge chute plugged)

• Start Bucket Elevator from the PLC Panel • Warning lights illuminate and horns sound (15 sec.) • Bucket Elevator starts • Vibrating Feeder is started Tanjung Jati B Training

Limestone Conveying System Bucket Elevator ELEVATOR DRIVE ASSEMBLY LADDER DISCHARGE CHUTE DRIVE CHAIN ASSEMBLY REVERSING CONVEYOR

ELEVATOR EXTERNAL CASING

TOP OF BUCKET ELEVATOR (LOOKING WEST) Tanjung Jati B Training


CHUTE PLUGGED (TILT) SWITCH

ACCESS DOOR

15o From Vertical

BUCKET ELEVATOR DISCHARGE CHUTE Tanjung Jati B Training

Limestone Conveying System Bucket Elevator Stopping the Bucket Elevator… • Stop the Vibrating Feeder • Allow Bucket Elevator to run to clear the buckets of Limestone (approximately 1-2 minutes) • Stop the Bucket Elevator from the PLC Panel • Stop the Reversing Conveyor


LIMESTONE CONVEYING SYSTEM BUCKET ELEVATOR (END)


Bucket Elevator

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