Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Comparison of particle collection characteristics in a wire-cylindrical wet electrostatic precipitator with and without a water film

와이어-실린더형 습식 전기집진기의 수막 유무에 따른 집진 특성 비교

  • Woo, Chang Gyu (Department of Environmental Machinery, Korea Institute of Machinery & Materials) ;
  • Cho, Won Ki (Department of Environmental Machinery, Korea Institute of Machinery & Materials) ;
  • Kim, Hak-Joon (Department of Environmental Machinery, Korea Institute of Machinery & Materials) ;
  • Kim, Yong-Jin (Department of Environmental Machinery, Korea Institute of Machinery & Materials) ;
  • Han, Bangwoo (Department of Environmental Machinery, Korea Institute of Machinery & Materials)
  • 우창규 (한국기계연구원 환경기계연구실) ;
  • 조원기 (한국기계연구원 환경기계연구실) ;
  • 김학준 (한국기계연구원 환경기계연구실) ;
  • 김용진 (한국기계연구원 환경기계연구실) ;
  • 한방우 (한국기계연구원 환경기계연구실)
  • Received : 2018.10.15
  • Accepted : 2018.11.04
  • Published : 2018.12.31
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Abstract

People's environmental concerns for fine particles in Korea lead to the strong necessity of improving the performance of environmental control systems. Wet electrostatic precipitators (ESPs) are considered as one of the alternatives to overcome the limit of previous dry ESPs, the re-entrainment of collected particles during rapping and back corona problem for high electrical resistivity dusts etc. In this study, a wire-cylindrical ESP with a thin water film has been developed. Particle collection characteristics were compared in the ESP with operations of water film on and off. Particle collection efficiencies at various applied voltages as well as voltage-current curves were almost the same in the ESP with and without a water film. Particle collection performance for PM1.0, PM2.5 and PM10 in the wet ESP with a water film was constantly maintained with operation time even in the high dust loading environment. This results indicate that a uniform water film in our wet ESP was successfully formed with a very thin layer without any dry spot and therefore could continuously clean the collected particles on the inner wall of the ESP without any performance degradation.

Keywords

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Fig. 1. Experimental setup in this work

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Fig. 2. Voltage-current curve of the wet-ESP with water film on and off

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Fig. 4. Collection efficiencies of the particles with various sizes in the wet ESP with water film on and off at different power consumption

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Fig. 3. (a) Size distributions and (b) collection efficiencies of the particles in the wet ESP with water film on and off at different applied voltages

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Fig. 5. (a) Change of collection efficiencies of PM1.0, PM2.5 and PM10 in the wet ESP with water film (a) off and (b) on with time during JIS 11 powder loading

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