cfbc operation pricnciple
TRANSCRIPT
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