Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Development and evaluation of improved fine particulate filter systems /
Author Dennis, Richard,
Other Authors
Author Title of a Work
Dirgo, John A.,
Grant, Marc A.,
Publisher Air and Energy Engineering Research Laboratory, 1985. Center for Environmental Research Information
Year Published 1985
Report Number EPA/600-S7-85-010
OCLC Number 896878684
Subjects Filters and filtration. ; Fabric filters. ; Fly ash.
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-S7-85-010 In Binder Headquarters Library/Washington,DC 05/09/2018
EJBD  EPA 600-S7-85-010 In Binder Headquarters Library/Washington,DC 10/17/2018
Collation 6 pages : charts ; 28 cm.
Caption title. At head of title: Project Summary. "EPA/600-S7-85-010." "May 1985."
Contents Notes
The filterability of fly ashes emitted by coal-burning power stations is described, including that of several ashes generated by low sulfur western U.S. coal combustion that are best controlled by fabric filtration. Chemical and mineralogical analyses of the coals were examined to determine possible relationships between coal and ash properties and filtration behavior. Both fly ash size and coal ash content correlated strongly with the fly ash specific resistance coefficient, Kb2s. Weaker, but discernible, correlations were shown for electrical charge behavior and method of coal firing. Coal sulfur content, ash fusion properties, and chemical structures originally expected to influence particle size showed no clear-cut effects on filtration characteristics. The relevant literature on pulse jet filter theory and applications was assessed to develop coherent guidelines for designing predictive filter models. The effects of jet size and location, jet air volume, and the intensity and duration of the jet pulses were related to pressure loss. Energy transfer from the jet pulse to the fabric was explored in terms of jet pressures, solenoid valve action, the ratio of pulse volume to bag volume, and the kinetic properties of the felt bags. Finally, predictive equations were developed for estimating pressure loss over a broad range of collector design and operating parameters.