CFBC OPERATON CFBC OPERATON PRINCIPLEPRINCIPLE

OPERATION PRINCIPLE OF OPERATION PRINCIPLE OF CFBCCFBC

• CLOSING OF DRAINS,OPENING OF HP&LP BYPASS ETC ARE SAME AS PF BOILER

• REACHING ROLLING PARAMETERS

• UNIT SYNCHRONISATION

• REFRACTORY WARMING UP DURING STARTUP IS CRITICAL ACTIVITY

OPERATION PRINCIPLE OF OPERATION PRINCIPLE OF CFBCCFBC

• COMBUSTOR HAS BED MATERIALS

• PRIMARY AIR LIFTS BED MATERIALS

• OILBURNER IS CUT IN

• HEAT IS APPLIED TO BED MATERIALS

BED MATERIALS AT RESTBED MATERIALS AT REST

BEFORE ADMISSION OF PRIMARY AIR

COMBUSTOR

NOZZLEBED MATERIAL

CFBC -BED FLUIDISATIONCFBC -BED FLUIDISATION

AFTER ADMISSION OF PRIMARY AIR

NOZZLEPRIMARY AIRBED MATERIAL

COMBUSTOR

CFBC-BASIC OPERATIONCFBC-BASIC OPERATION

BED MATERIAL FLUIDISATION BY PA+SA

PRIMARY AIR

SA

NOZZLE

SIZE IOO%LESS THAN I.00 MM

CFBC-BASIC OPERATIONCFBC-BASIC OPERATION

• BEDMATERIAL ENTRY TO CYCLONE

PRIMARY AIR

SA

NOZZLE

CYCLONE

CFBC-BASIC OPERATIONCFBC-BASIC OPERATION

• BED MATERIALRECIRCULATION

PRIMARY AIR

SA

NOZZLE

CYCLONE

SEPERATION

CFBC-BASIC OPERATIONCFBC-BASIC OPERATION

LIGHTUP

PRIMARY AIR

SA

CYCLONESH

RH

TO APH

ECO

GAS

NOZZLE

CON.PASS

OPERATION PRINCIPLE OF OPERATION PRINCIPLE OF CFBCCFBC

• BED MATERIALS WARMEDUP

• BED MATERIALS STARTS CIRCULATION/RECIRCULATION

• HEAT IS TRANSFERRED TO WATER WALLS BY BED MATERIALS LEADS TO STEAMING

CFBC-BASIC OPERATIONCFBC-BASIC OPERATION

LIGNITE

PRIMARY AIR

SA

CYCLONESH

RH

TO APH

ECO

GAS+FLYASH

NOZZLE

CON.PASS L

OPERATION PRINCIPLE OF OPERATION PRINCIPLE OF CFBCCFBC

• FURNACE REACHES 600 DEG

• FUEL ADMISSION FROM BUNKERS

• BED MATERIALS HEATED UP FURTHER CIRCULATION/ RECIRCULATION INTENSIVELY

• HEAT TRANSFER TO WATERWALLS INTENSIFIED

CFBC- OPERATIONCFBC- OPERATION

LIG+LIME

PRIMARY AIR

SA

CYCLONESH

RH

TO APH

ECO

GAS+FLYASH+GYPSUM

NOZZLE

CON.PASSL

LIME

FLUIDISED BED HEAT FLUIDISED BED HEAT EXCHANGEREXCHANGER

• FBHE

PRIMARY AIR

SA

CYCLONESH

RH

TO APH

ECO

GAS+FLYASH+GYPSUM

CON.PASS

FBHE

CFBC-BOTTOM ASH CFBC-BOTTOM ASH

• ASH

PRIMARY AIR

SA

CYCLONESH

RH

TO APH

ECO

GAS+FLYASH

CON.PASS

FBHE BA

CFBCCFBC