Record Display for the EPA National Library Catalog


Main Title Development of advanced ESFF technology /
Other Authors
Author Title of a Work
Lamb, G. E. R.,
Jones, R. I.,
Duffy, K. T.,
Saville, D. A.,
Morris, B. A.,
Hovis, Louis S.,
Publisher U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory,
Year Published 1986
Report Number EPA/600-S7-85-049
OCLC Number 896827143
Subjects Fabric filters. ; Air--Pollution. ; Electric resistors. ; Filters and filtration.
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-S7-85-049 In Binder Headquarters Library/Washington,DC 05/10/2018
EJBD  EPA 600-S7-85-049 In Binder Headquarters Library/Washington,DC 10/17/2018
Collation 3 pages : illustrations ; 28 cm
Caption title. "January 1986." "EPA/600-S7-85-049."
Contents Notes
This report summarizes work done to explore ways to magnify the ffects and broaden the scope of electrical stimulation of fabric filtration (ESFF). The importance of these effects was established in earlier work, both in the laboratory and in pilot plant trials. The present work covered a number of separate topics: a) effects of particle charge levels, b) mechanisms of pressure drop reduction, c) programming applied electric fields with respect to time, d) cleaning fabric filters, and e) printed electrodes. The results showed that particle charge has a strong effect on the response of filtration performance to ESFF and that some form of precharging would be cost-effective in many cases. measurements of dust deposition patterns showed that electrical effects cause shifts in the dust deposits: a) toward the entrance of the bag, b) to the electrodes, and c) toward the surface of the fabric. Results of modeling studies agree quantitatively with the observed effects. Studies of programmed voltages examined the possibility of using sudden changes in electric field to aid bag cleaning and also the effects of using ac rather than dc fields, but neither approach held out promise of significantly improved performance. When pulse-cleaned bags were run at higher than conventional velocities, penetration rose to unacceptable levels; whereas, with bags cleaned with reverse air, pressure drop reached large values. The difference appears to be related to the energy levels of the two cleaning mehtods. "Printed' electrodes (PEs) are stripes of conducting material replacing metal wire electrodes and having the advantages of lower cost and the possibility of applying electrodes of complicated design; they appear to be as effective as wire electrodes.