Date post: | 15-Aug-2015 |
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Engineering |
Upload: | munesh-singh |
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A Presentation on
ASH HANDLING IN POWER PLANTS
By:ALOK PRAKASHPG-ICE/136309
BRIEF FLOW OF PRESENTATION
• Sources of ash
• Overview of ash handling
• Types of ash handling
• Main parts of dry and wet ash handling
• Applications of fly ash
• Burning of pulverized coal in furnace results in the generation of large quantity of ash. this ash constitutes of 80-90% of dry ash and 10-20% of bottom ash.
• Fly ash is one of the residues generated in combustion, and comprises of fine particles that rises with the flue gases.
SOURCES OF ASH
Types :-
• Dry ash handling
• Bottom ash handling
ASH HANDLING TECHNIQUE
DRY ASH HANDLING
DRY ASH FROM FURNACE
(ESP+ECO.+AIR PRE-HEATER) HOPPER
BUFFER HOPPER
TRANSPORT AIR COMPRESSOR
DRY FLY ASH STORAGE SILO
SILO TRUCKS HCSD SYSTEM
ASH POND
MAIN PARTS OF DRY ASH DISPOSAL SYSTEM
• Electrostatic precipitator(ESP)
• Buffer hopper
• Transport air compressor(TAC)
ESP
BUFFER HOPPER
TRANSPORT AIR COMPRESSOR
SILO STORAGE
HIGH PRESSURE
WATER
BOTTOM ASH HANDLING
ASH SLAG FROM FURNACE BOTTOM
BOTTOM ASH HOPPER (water impounded)
CLINKER GRINDER
JET PUMP ASH SLURRY SUMP
HYDROBIN
DECANTING
WATER
DRY ASH
SILO TRUCKS
SCRAPPER CHAIN CONVEYOR
MAIN PARTS OF BOTTOM ASH DISPOSAL SYSTEM
• Bottom ash hopper
• Scrapper chain conveyor
• Clinker grinder
• Slurry sump
• Hydrobin
SCRAPPER CHAIN CONVEYOR
CLINKER GRINDER
HYDROBBINS
APPLICATION OF FLY ASH
• Cement production
• Road construction
• Stabilization of soft soils
• Bricks
• Mineral filler in asphaltic concrete
• Mine reclaimation