This presentation discusses ash handling in power plants. It describes the two main types of ash handling - dry ash handling and bottom ash handling. For dry ash handling, the main parts of the system are the electrostatic precipitator, buffer hopper, transport air compressor, and dry fly ash storage silo. For bottom ash handling, the key components are the bottom ash hopper, scrapper chain conveyor, clinker grinder, slurry sump, and hydrobin. Fly ash has various applications including use in cement production, road construction, soil stabilization, and mine reclamation.

1. A Presentation
on
ASH HANDLING IN POWER PLANTS
By:
ALOK PRAKASH
PG-ICE/136309

2. 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

3. • 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

6. Types :-
• Dry ash handling
• Bottom ash handling
ASH HANDLING TECHNIQUE

7. 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

8. MAIN PARTS OF DRY ASH
DISPOSAL SYSTEM
• Electrostatic precipitator(ESP)
• Buffer hopper
• Transport air compressor(TAC)

9. ESP

10. BUFFER HOPPER

11. TRANSPORT AIR COMPRESSOR

12. SILO STORAGE

13. 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
WATE
R
DRY ASH
SILO TRUCKS
SCRAPPER CHAIN CONVEYOR

15. MAIN PARTS OF BOTTOM ASH
DISPOSAL SYSTEM
• Bottom ash hopper
• Scrapper chain conveyor
• Clinker grinder
• Slurry sump
• Hydrobin

16. SCRAPPER CHAIN CONVEYOR

17. CLINKER GRINDER

18. HYDROBBINS

19. APPLICATION OF FLY ASH
• Cement production
• Road construction
• Stabilization of soft soils
• Bricks
• Mineral filler in asphaltic concrete
• Mine reclaimation