New flue gas scrubber process is sludge-free
Davy Powergas Inc. offers its Davy S-H process as less expensive than others and producing a salable grade of gypsum instead of a messy sludge. The process was developed jointly by a major European utility, Saarbergwerke A.G. and an engineering firm, Holter G.m.b.H. and was formerly known as the Saarberg-Holter process. A commercial unit was started up in May 1979 at the Weiher station in West Germany on a 175 Mw FGD unit. After particulates are substantially removed, the flue gas is scrubbed with a clear alkaline washing solution of calcium hydroxide, calcium formate, and calcium chloride; SO/sub 2/ is absorbed to form calcium bisulfite, a water-soluble calcium-sulfur compound. When the solution is regenerated by oxidation, large gypsum particles form which are easily removed from a clear overflow solution. The scrubber is free from scale, incrustation, and plugging. The process achieves up to 95Vertical Bar3< desulfurization with demonstrated reliability. Capital and operating costs are tabulated for a 500 Mw plant burning 3.5Vertical Bar3< sulfur coal with a 90Vertical Bar3< SO/sub 2/ scrubbing requirement.
- Research Organization:
- Davy Powergas Inc.
- OSTI ID:
- 6577530
- Journal Information:
- Coal Min. Process.; (United States), Journal Name: Coal Min. Process.; (United States) Vol. 16:6; ISSN CMPRB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010800* -- Coal
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& Peat-- Waste Management
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CAPITALIZED COST
CHALCOGENIDES
CHEMICAL REACTIONS
COST
DATA
DESULFURIZATION
EUROPE
FEDERAL REPUBLIC OF GERMANY
FINANCIAL DATA
FLUE GAS
GASEOUS WASTES
GYPSUM
INFORMATION
MINERALS
OPERATING COST
OXIDES
OXYGEN COMPOUNDS
REMOVAL
SAARBERG-HOLTER PROCESS
SCRUBBING
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TECHNOLOGY ASSESSMENT
WASTES
WESTERN EUROPE