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OLS Field Name OLS Field Data
Main Title Electrostatic Enhancement of Fabric Filtration of Fly Ash and Spray Dryer By-Product.
Author Hovis, L. S. ; Daniel, B. E. ; Donovan, R. P. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. ;Research Triangle Inst., Research Triangle Park, NC.
Year Published 1985
Report Number EPA/600/D-85/277;
Stock Number PB86-130010
Additional Subjects Fly ash ; Air pollution control equipment ; Spray drying ; Industrial wastes ; Combustion products ; Byproducts ; Pressure ; Performance evaluation ; Electrostatic fabric filters ; Fabric filters
Library Call Number Additional Info Location Last
NTIS  PB86-130010 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 27p
Abstract The paper describes small pilot-scale experiments, showing that the pressure drop increase during the fabric filtration of redispersed spray dryer by-product (chiefly calcium salts and fly ash) is significantly reduced by electrostatic enhancement of the filtration. The pressure drop rise for a typical electrostatically augmented fabric filtration (ESFF) is only 25% or less of that of the rise for a conventional filtration cycle. The ESFF takes advantage of the electrical characteristics of the spray dryer by-product, specifically the higher natural electrical charge, as compared to fly ash, and the relatively lower electrical resistivity of the spray dryer by-product at the high moisture and the low temperature conditions of filtration of spray dryer by-product. The low resistivity of the spray dryer by-product and certain fly ashes allows application of high corona voltages in the new Center-wire ESFF to produce an even slower pressure drop increase over the filtration cycle. Center-wire ESFF proved to be operable under conditions of high gas velocities and grain loadings which were beyond the range for successful conventional reverse-air fabric filtration. Results of tests on the Center-wire ESFF are presented and compared with conventional fabric filtration.
Supplementary Notes Prepared in cooperation with Research Triangle Inst., Research Triangle Park, NC.
PUB Date Free Form Nov 85
Category Codes 13B; 68A
NTIS Prices PC A03/MF A01
Primary Description 600/13
Document Type NT
Cataloging Source NTIS/MT
Control Number 605823957
Origin NTIS
Type CAT