Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Evaluation of Collection Efficiency of Electrostatic Precipitator for Removing Limestone Slurry Particles

석회석 슬러리 입자 제거를 위한 전기집진기 포집효율 평가

  • Lee, Gi-Hyuk (School of Mechanical Engineering, Hanyang University) ;
  • Kim, Moon-Won (Department of Convergence Defense, Hanyang University) ;
  • Yu, Tae-U (Institute of Engineering Research, Yonsei University) ;
  • Yook, Se-Jin (School of Mechanical Engineering, Hanyang University)
  • 이기혁 (한양대학교 기계공학부) ;
  • 김문원 (한양대학교 융합국방학과) ;
  • 류태우 (연세대학교 공학연구원) ;
  • 육세진 (한양대학교 기계공학부)
  • Received : 2019.06.18
  • Accepted : 2019.06.27
  • Published : 2019.06.30
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Abstract

Recently, there has been much research on the effect of fine dust on human body with increasing interest in the fine dust. Thermal power plant, which is considered as one of the main sources of fine dust, is reported to be responsible for 14% of the total amount of domestic fine dust in the Republic of Korea. Therefore, dust collecting devices in the thermal power plant need to be improved. In this study, the electrostatic precipitator (ESP) was considered to substitute for a mist eliminator used in flue gas desulfurization facility. By considering real situation in the flue gas desulfurization facility, the collection efficiency of the ESP was evaluated by using the sprayed limestone slurry particles. The collection efficiency of the ESP was higher than that of the mist eliminator, showing the possibility of replacing the mist eliminator with the ESP in flue gas desulfurization facility.

Keywords

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Fig. 1. Schematic of the mist eliminator considered as a reference (Kim et al., 2018).

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Fig. 2. Discharge electrode shapes (a) sextuple spike electrode (b) saw-tooth electrode.

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Fig. 3. Collecting plate shapes (a) circular (b) hexagonal (c) square.

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Fig. 4. Schematic of experimental setup.

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Fig. 5. Voltage-current characteristics of the electrostatic precipitators according to discharge electrode shape.

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Fig. 6. Comparison of collection efficiency between the collecting plates of electrostatic precipitator

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Fig. 7. Comparison of collection efficiency between the electrostatic precipitator and the mist eliminator at the same aerosol flow rate.

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Fig. 8. SEM image of limestone particles (a) sampled from the agitated tank (b) sampled right after the spray nozzle; (c) sampled after the mist eliminator; (d) sampled after the electrostatic precipitator.

Table 1. Cases of electrostatic precipitator shape considered in this study.

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Table 2. EDS analysis result for the sampled limestone particles.

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