||Advanced Electrostatic Stimulation of Fabric Filtration: Performance and Economics (Journal Article).
Viner, A. S. ;
Greiner, G. P. ;
Hovis, L. S. ;
||Research Triangle Inst., Research Triangle Park, NC. ;ETS, Inc., Roanoke, VA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Fabric filters ;
Air pollution control equipment ;
Dust filters ;
Dust collectors ;
Performance tests ;
Electric power plants ;
Economic analysis ;
Air pollution abatement ;
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The paper discusses the performance and economics of advanced electrostatic stimulation of fabric filtration (AESFF), in which a high-voltage electrode is placed coaxially inside a filter bag to establish an electric field between the electrode and the bag surface. The electric field alters the dust deposition pattern in the bag, yielding a much lower pressure drop than that in a conventional bag. Pilot plant results show that AESFF bags can operate with a rate of pressure loss that is 70% below that for conventional bags. The presence of the electric field also affects the aging characteristics of the AESFF bags. On the average, the AESFF bags had residual drags that were 10% below those of conventional bags. The results show that AESFF baghouses can yield the same pressure drop performance as conventional baghouses while operating at much higher air/cloth ratios. An economic analysis evaluated the capital, operating, and maintenance costs for electric utility plants ranging from 200 to 1000 MW. For AESFF baghouses, the capital cost was found to be 25 to 48% below that of a conventional baghouse. A lifetime cost analysis predicts a net present value for an AESFF baghouse that is 10 to 30% below that of a conventional baghouse.