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A CONTINUED INVESTIGATION OF ELECTRICALLY STIMULATED FABRIC FILTRATION
Citation:
HEAPHY, R. F. AND K. M. CUSHING. A CONTINUED INVESTIGATION OF ELECTRICALLY STIMULATED FABRIC FILTRATION. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-05/057 (NTIS PB2006-102424), 2005.
Description:
The report summarizes three experiments performed by Southern Research Institute under a cooperative agreement with EPA. First was a demonstration of electrostatically stimulated fabric filtration (ESFF) used to collect particulate matter (PM) from fossil fuel electrical power plants. The second was a cooled pipe charger and a separate array of collector plates for such plants. The third was a review of new fine PM control technologies. The ESFF bags are arrayed as in a standard bag house but with a high voltage corona electrode located in the center of each four-bag group. Tests with and without the corona energized found that a third less pressure, on average, was required to operate the energized bag house. Particle penetration was found to be materially lower when the corona was energized, an improvement attributed to the reduced need for bag cleaning. The second demonstration mounted a cooled-pipe array below the filter bags and modified the voltage electrodes. Significant performance improvements were found. Without either the electrical field or the collection field charged, the specific drag coefficient was approximately 19 inches of water. With either field active, this dropped to about 12 inches. With both active, it fell further to 8.6 inches. The drag coefficient was similar when the particle charger or the collection field operated alone. Among the unusual technologies reported on besides ESFF were the advanced hybrid particulate collector, the compact hybrid particulate collector, the fine particle agglomerator, and the bipolar charger/agglomerator. Data was presented as available.