대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제24권2호
  • /
  • Pages.251-259
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  • 2000
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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1단 전기 집진기에서 2차 유동이 집진 효율에 미치는 영향

Effect of Secondary Flows on the Particle Collection Efficiency in Single Stage Electrostatic Precipitator

  • 이재복 (연세대학교 대학원 기계공학과) ;
  • 배귀남 (한국과학기술연구원 지구환경연구센터) ;
  • 황정호 (연세대학교 기계공학과)
  • 발행 : 2000.02.01
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초록

The ionic wind formed in a nonuniform electric field has been recognized to have a significant effect on particle collection in an electrostatic precipitator(ESP). Under normal operating conditions the effect of ionic wind is not pronounced. However, as the flow velocity becomes smaller, the ionic wind becomes pronounced and induces secondary flow, which has a significant influence on the flow field and the particle collecting efficiency. In this paper, experiments for investigating the effect of secondary flow on collection efficiencies were carried out by changing the flow velocities in 0.2-0.7m/s and the applied voltages in 9-11kV/cm. The particle size distributions and concentrations are measured by DMA and CNC. To analyze the experimental results, numerical analysis of electric filed in ESP was carried out. It shows that particle collection is influenced by two independent dimensionless numbers, $Re_{ehd}\;and\;Re_{flow}$ not by $N_{ehd}$ alone. When $Re_{flow}$, decreases for constant $Re_{ehd}$, the secondary flow prohibits the particle collection. But when $Re_{ehd}$ increases for constant $Re_{flow}$, it enhances the particle collection by driving the particles into the collection region.

키워드

참고문헌

  1. Clements, J. S., A, Mizuno, A., Finney, W. C., and Davis, R. H., 1989, 'Combined Removal of $SO_2$, $NO_x$, and Fly Ash from Simulated Flue Gas Using Pulsed Streamer Corona,' IEEE Trans. Ind. Applications, Vol. 25, pp. 62-69 https://doi.org/10.1109/28.18870
  2. Robinson, M., 1976, ERDA, Health & Safety Lab. Rep. HASL-301
  3. Yabe, A., Mori, Y. and Hijikata, K., 1978, 'EHD Study of The Corona Wind between Wire and Plate Electrodes,' AIAA J., Vol. 16, pp. 340-345
  4. Yamamoto, T. and Velkoff, H. R., 1981, 'Electrohydrodynamics in an Electrostatic Precipitator,' J. Fluid Mech., Vol. 108, pp. 1-18 https://doi.org/10.1017/S002211208100195X
  5. Leonard, G. L., Michner, M. and Self, S. A., 1980, 'Experimental Study of the Effect of Turbulent Diffusion on Precipitation Efficiency,' J. Aerosol Sci., Vol. 13, pp. 271-284 https://doi.org/10.1016/0021-8502(82)90030-1
  6. Kallio, G. A. and Stock, D. E., 1992, 'Interaction of Electrostatic and Fluid Dynamic Fields in Wire-Plate Electrostatic Precipitator,' J. Fluid Mech., Vol. 240, pp. 133-166 https://doi.org/10.1017/S0022112092000053
  7. Goo, J. H. and Lee, J. W., 1997, 'Stochastic Simulation of Particle Charging and Collection Characteristics for a Wire-Plate Electrostatic Precipitator of Short Length,' J. Aerosol Sci., Vol. 28, pp. 875-893 https://doi.org/10.1016/S0021-8502(96)00475-2
  8. 정상현, 김상수, 1994, '1단 전기집진기에서 난류확산과 2차 유동이 입자의 농도분포에 미치는 영향,' 94년 열 및 유체공학 부문 학술대회 논문집, pp. 8-15
  9. Choudhary, K. R. and Gentry, J. W., 1974, 'Particle Collection Efficiency of a Bench Scale Electrostatic Precipitator in the Field Charging Region as a Function of Particle Size,' J. Colloid and Interface Sci. Vol. 48, pp. 263-280 https://doi.org/10.1016/0021-9797(74)90161-1
  10. McCain, J. D., Gooch, J. P. and Smith, W. B., 1975, 'Results of Field Measurements of Industrial Particulate Sources and Electrostatic Precipitator Performance,' J. Air Pollution Control. Assoc., Vol. 25, pp. 117-121
  11. Ylatalo, S. I., Kauppinen, E. I., Hautanen, J., Joutsensaari, J., Ahonen, P., Lind, T. M., Jokiniemi, J. K. and Kipelainen, M., 1992, 'On the Determination of Electrostatic Precipitator Efficiency by Differential Mobility Analyzer,' J. Aerosol Sci., Vol. 23, pp. s795-s798 https://doi.org/10.1016/0021-8502(92)90531-Y
  12. Yoo, K. H., Lee, J. S. and Oh., M. D., 1997, 'Charging and Collection of Submicron Particles in Two Stage Parallel Plate Electrostatic Precipitator,' J. Aerosol Sci., Vol. 27, pp. 308-323 https://doi.org/10.1080/02786829708965476
  13. Liang, W. J. and Lin, T. H., 1994, 'The Characteristics of Ionic Wind and Its Effect on Electrostatic Precipitators,' Aerosol Sci. Technol., Vol. 20, pp. 330-344
  14. MacDonald, J. R., Smith, W. B. and Spencer, H. W., 1977, 'A Mathematical Model for Calculating Electrical Conditions in Wire Duct Electrostatic Precipitation Device,' J. Appl. Phys., Vol. 48, pp. 2231-2243 https://doi.org/10.1063/1.324034
  15. Okazaki, K. and Willeke, K., 1987, 'Transmission and Deposition Behavior of Aerosols in Sampling Inlets,' Aerosol Sci. Technol., Vol. 7, 275-283 https://doi.org/10.1080/02786828708959164
  16. Oglesby, S. and Nichols, G. B., 1978, Electrostatic Precipitation, pp. 44-45, Marcel Dekker