Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Filter cake redeposition in a pulse-jet filter /
Author Leith, David. ; First., Melvin W.
Other Authors
Author Title of a Work
First, Melvin W.,
CORP Author Harvard School of Public Health, Boston, Mass.;Industrial Environmental Research Lab., Research Triangle Park, N.C.
Publisher Environmental Protection Agency, Office of Research and Development ; For sale by the National Technical Information Service,
Year Published 1977
Report Number EPA-600/7-77-022; EPA-R-801399
Stock Number PB-266 233
OCLC Number 04087090
ISBN pbk.
Subjects Filters and filtration. ; Filters and filtration.
Additional Subjects Dust collectors ; Air pollution control ; Air filters ; Jet engines ; Caking ; Particles ; Deposition ; Mathematical models ; Experimental design ; Numerical analysis ; Fabric filters
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-7-77-022 Headquarters Library/Washington,DC 02/11/2014
EKAM  EPA 600/7-77-022 Region 4 Library/Atlanta,GA 07/08/1994
EKBD  EPA-600/7-77-022 Research Triangle Park Library/RTP, NC 10/17/2003
ESAD  EPA 600-7-77-022 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-266 233 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation vi, 33 p. : ill. ; 28 cm.
The report gives results of a pilot-scale study of pulse-jet filter cleaning, a process that is ineffective to the extent that collected dust redeposits, rather than falling to the hopper. Dust tracer techniques were used to measure the amount of redeposition. A mathematical model based on experimental results was developed to describe dust transfer from bag to bag, redeposition on the pulsed bag, and migration to the hopper. At conventional filtration velocities (5 cm/s), most of the dust freed from the bag by the cleaning pulse was found to redeposit (38% on the cleaned bag and 50% on the two neighboring bags) rather than fall to the hopper. At high velocities (15 cm/s), redeposition was more pronounced, 83% on the cleaned bag and 16% on the neighboring bags. At a sufficiently high velocity, redeposition may become total: no dust will fall into the hopper, the dust cake will continue increasing in thickness, and the pressure drop will increase without limit as long as constant velocity is maintained. The study indicates that reasonable pressure drop can be achieved at high velocity only when there is a reduction in filter cake redeposition. Although filter performance depends on more parameters than were examined, the trend of increasing redeposition with increasing velocity may persist regardless of the dust, fabric, or filter configuration.
Grant no. R801399, program element no. EHE624. Issued Mar. 1977. Includes bibliographical references (p. 27).