Dry ash handling system for power plants

Journal Article · Mon Nov 01 04:00:00 EST 1982 · J. Energy Div. (Am. Soc. Civ. Eng.); (United States)

OSTI ID:5716793

Rafay, T

The most commonly used wet ash handling system in which slurried ash is pumped to ash lagoons is compared with a relatively new dry ash handling system in which moistened fly ash and dewatered bottom ash are continously transported to the disposal area and compacted. The proposed system for a typical 2,000 MW power plant features submerged drag bar conveyors under the boiler hopper and a system of fixed and movable conveyors. Two sets of independent conveyors are provided to enable conveyance of fly ash and bottom ash separately when required, and to minimize chances of complete breakdown of the system. These conveyors are fully enclosed to reduce noise and dust. Manned equipment is limited to bulldozers which spread and compact the ash. Problems in conveying, storing, and compacting ash are enumerated. Control of moisture content, use of suitable compactors, and provision of lined drainage courses in the ash pile are emphasized. Conveyor movements are shown with reference to a valley disposal area. As soon as the top of the ash pile is reached, it is covered with topsoil and seeded. Runoff to be treated is restricted to that over the exposed ash area by means of interception ditches.

• Research Organization: INTEG-Intercontinental Engrg. Limited, Vancouver, British Columbia
• OSTI ID: 5716793
• Journal Information: J. Energy Div. (Am. Soc. Civ. Eng.); (United States), Journal Name: J. Energy Div. (Am. Soc. Civ. Eng.); (United States) Vol. 108:EY3; ISSN JDAED
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200200* -- Fossil-Fueled Power Plants-- Waste Management
42 ENGINEERING
420900 -- Engineering-- Waste Processing Plants & Equipment-- (-1989)
AEROSOL WASTES
ASHES
COMPACTORS
CONVEYORS
DRAINAGE
DRY ASHING
EQUIPMENT
FLY ASH
HAULAGE EQUIPMENT
MATERIALS HANDLING EQUIPMENT
MOISTURE
POWER PLANTS
PUMPING
REMOVAL
RESIDUES
WASTES
WATER REMOVAL