Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Particle removal characteristics of high-velocity electrostatic mist eliminator

정전 고속 미스트 엘리미네이터의 포집 효율 특성

  • Kim, Jin-seon (Environmental System Research Division, Korea Institute of Machinery and Materials) ;
  • Kim, Hak-Joon (Environmental System Research Division, Korea Institute of Machinery and Materials) ;
  • Han, Bangwoo (Environmental System Research Division, Korea Institute of Machinery and Materials) ;
  • Woo, Chang Gyu (Environmental System Research Division, Korea Institute of Machinery and Materials) ;
  • Kim, Yong-Jin (Environmental System Research Division, Korea Institute of Machinery and Materials) ;
  • Lee, Sangrin (Doosan Heavy Industries & Construction Co. LTD) ;
  • Moon, Sangchul (Doosan Heavy Industries & Construction Co. LTD)
  • 김진선 (환경시스템연구본부, 한국기계연구원) ;
  • 김학준 (환경시스템연구본부, 한국기계연구원) ;
  • 한방우 (환경시스템연구본부, 한국기계연구원) ;
  • 우창규 (환경시스템연구본부, 한국기계연구원) ;
  • 김용진 (환경시스템연구본부, 한국기계연구원) ;
  • 이상린 (두산중공업) ;
  • 문상철 (두산중공업)
  • Received : 2018.11.20
  • Accepted : 2018.12.20
  • Published : 2018.12.31
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Abstract

In this study, we developed a flat-plate type wet electrostatic precipitator that generates stable corona discharge compared to wire type discharge electrode. In order to compare the particle removal efficiency according to the shape of the discharge electrode such as the variation of the horizontal and vertical distance between spiked edges, and the variation of the height of discharge pin support were tested. As a result, when the horizontal distance between spiked edges was increased up to 36 mm, the vertical distance between spiked edges was increased up to 54 mm, and the height of the discharge pin support was increased up to 76 mm, the removal efficiency of PM10 was maintained at approximate 60.0%. Furthermore, the removal efficiency of particles over $5{\mu}m$ was about 80% or more. When the flow rate was 4 m/s, the gap between collection plates was 60 mm, and -14 kV was applied to the discharge electrode. The particle removal efficiency of the flat-plate type electrostatic precipitator was maintained when the horizontal and vertical distance between spiked edges, and the height of the discharge pin support was below a certain level. Those variables may be the important design factors for the shape of the discharge electrode. Therefore, when designing the electrostatic precipitator with multiple channels, the horizontal and vertical distance between spiked edges, and the height of discharge pin support must be selected in consideration of the weight of the discharge electrode and the processing cost.

Keywords

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Fig 1. Schematic of the experimental apparatus.

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Fig. 3. The variation of geometry of the discharge electrode for the comparison of the particle removal efficiency.

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Fig. 4. The results of the experiment of the particle removal efficiency by the variation of flow velocity. (a) average oil particle size distribution of upstream, (b) V-I characteristics, (c) mass concentration and particle removal efficiency of the downstream by the variation of the applied voltage, and (d) the comparison of the particle removal efficiency by the particle size.

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Fig. 5. The results of the experiment of the particle removal efficiency by the variation of the gap between the collection plates. (a) V-I characteristics, and particle removal efficiency (b) by power/flow rate, (c) by electric field strength.

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Fig. 6. The results of the experiment of the particle removal efficiency by the variation of horizontal distance between spiked edges. (a) V-I characteristics, and particle removal efficiency (b) by the variation of horizontal distance between spiked edges, (c) by the particle size.

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Fig. 7. The results of the experiment of the particle removal efficiency by the variation of vertical distance between spiked edges. (a) V-I characteristics, and particle removal efficiency (b) by the variation of vertical distance between spiked edges, (c) by the particle size.

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Fig. 8. The results of the experiment of the particle removal efficiency by the variation of height of the discharge pin support. (a) V-I characteristics, and particle removal efficiency (b) by the variation of height of the discharge pin support, (c) by the particle size.

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Fig, 2. The basic form of the discharge electrode.

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