Flue gas scrubber produces gypsum

Journal Article · Mon Dec 31 23:00:00 EST 1979 · Instrum. Control Syst.; (United States)

OSTI ID:5336550

Chiyoda Chemical Engineering and Construction Co. Ltd. has developed an FGD system which overcomes problems associated with conventional limestone scrubbers, including formation of calcium sulfite sludge. In the Chiyoda system, stack gases and air are bubbled through a limestone slurry. With air, sulfur and lime react to form calcium sulfate (gypsum) which can be stacked, pressed into wallboard, or disposed of in landfill. In an eight-month test sponsored by the Electric Power Research Institute, the scrubber operated 97% of the time without shutting down for maintenance and only a minimum of calcium scaling occurred. In a 500 Mw powerplant, such a system would save $3 million/yr in operating costs.

• OSTI ID: 5336550
• Journal Information: Instrum. Control Syst.; (United States), Journal Name: Instrum. Control Syst.; (United States) Vol. 53:1; ISSN INCSA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CHEMICAL REACTIONS
CONTROL
COST
DESULFURIZATION
DISPERSIONS
EQUIPMENT
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
GYPSUM
LIME-LIMESTONE WET SCRUBBING PROCESSES
MINERALS
MIXTURES
OPERATING COST
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
PRODUCTION
SCRUBBERS
SCRUBBING
SLURRIES
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
SUSPENSIONS
THERMAL POWER PLANTS
WASTE PRODUCT UTILIZATION
WASTES