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