Record Display for the EPA National Library Catalog

RECORD NUMBER: 40 OF 321

OLS Field Name OLS Field Data
Main Title Combined Flue Gas Desulfurization and Water Treatment in Coal-Fired Power Plants.
Author Borgwardt, Robert H. ;
CORP Author Industrial Environmental Research Lab., Research Triangle Park, NC.
Year Published 1979
Stock Number PB80-184310
Additional Subjects Air pollution control ; Water pollution control ; Electric power plants ; Industrial wastes ; Combustion products ; Limestone ; Flue gases ; Scrubbers ; Sulfur dioxide ; Pilot plants ; Chlorides ; Reprints ; Coal fired power plants ; Limestone scrubbing ; Waste water reuse ; Flue gas desulfurization
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB80-184310 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 7p
Abstract
The paper gives results of pilot plant experiments to investigate the feasibility of replacing makeup water in limestone flue gas desulfurization (FGD) scrubbers with a simulated cooling tower blowdown. Tests were conducted while forcing the oxidation of the scrubber slurry to gypsum and maintaining Cl(-) concentrations at levels expected with the use of high-sulfur coals of moderate chloride content. Results show that all of the makeup water could be replaced with blowdown containing up to 690 ppm Na(+) when operating at SO2 make-per-pass below 8 mmol/L and a tightly closed scrubber loop. Material balances indicate that the uncontrolled discharge of soluble salts and trace elements from a power plant can be markedly reduced by application of water treatment units such as vapor-compression/evaporation as an integral part of the FGD scrubber. Such systems should be more effective in maximizing water reuse and should have lower energy requirements than the direct application of water treatment to blowdown streams.