Use of Membrane Collectors in Electrostatic Precipitators
Membrane collection surfaces, developed and patented by researchers at Ohio University, were used to replace steel plates in a dry electrostatic precipitator (ESP). Such replacement facilitates tension-based rapping, which shears the adhered particle layer from the collector surface more effectively than hammer-based rapping. Tests were performed to measure the collection efficiency of the membranes and to quantify the potential improvements of this novel cleaning technique with respect to re-entrainment. Results indicate that even semiconductor materials (e.g., carbon fibers) collect ash nearly as efficiently as steel plates, potentially indicating that collection surface resistivity is primarily dictated by the accumulated ash layer and not by the underlying plate conductivity. In addition, virtually all sheared particles separated from the collecting membranes fell within the boundary layer of the membrane, indicating extremely low potential for re-entrainment.
D. J. Bayless et al., "Use of Membrane Collectors in Electrostatic Precipitators," Journal of the Air and Waste Management Association, vol. 51, no. 10, pp. 1401-1407, Taylor & Francis, Oct 2001.
The definitive version is available at https://doi.org/10.1080/10473289.2001.10464372
Mechanical and Aerospace Engineering
Keywords and Phrases
Ash Handling; Membranes; Plates (Structural Components); Steel Structures; Membrane Collectors; Electrostatic Separators; Carbon Fiber; Steel; Adhesion; Article; Ash; Boundary Layer; Cleaning; Conductance; Electricity; Membrane; Precipitation; Priority Journal; Semiconductor; Shear Rate; Surface Tension
International Standard Serial Number (ISSN)
Article - Journal
© 2001 Air and Waste Management Association, All rights reserved.
01 Oct 2001