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The Improvement of Collection Efficiency of Electrostatic Precipitator  

Ahn, Kook-Chan (Department of Mechanical Design Engineering, Jinju National University)
Kim, Bong-Hwan (Department of Air Conditioning, Refrigerating & Sanitary Systems, Yangsan College)
Lee, Gwang-Seok (Department of Electronic Engineering, Jinju National University)
Publication Information
Journal of the Korean Society of Safety / v.17, no.4, 2002 , pp. 25-30 More about this Journal
Abstract
This paper demonstrates the effects of dust electrical resistivity on electrostatic precipitability. The effects of gas temperature, velocity and humidity on the collection efficency were considered by used of coal fly ashes from fluidized bed combustion boiler. The experiments for collection efficiency were carried out in the pilot plant. The ashes which have non-spherical geometry and high electrical resistivity were used. Electrical resistivity is an important property for the collection efficiency in the electrostatic precipitators. Fly ash resistivity as a function of temperature up $350{\circ}C$ and water concentration(up to 15%) has been experimentally investigated using the resistivity test equipment consisted of the movable electrode, dust cup, and furnace. As the resistivity of fly ash in the operating temperature($150{\circ}C$) of an electrostatic precipitator was measured higher than $1010{\Omega}{\cdot}$cm, flue gas conditioning in the electrostatic precipitator to reduce the resistivity of fly ash is required.
Keywords
dust resistivity; electrostatic precipitator; collection efficiency; fly ashes; water concentration;
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