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

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Experimental Study on the Corona Discharge Characteristics of the Pin-plate Electrode Geometries

핀이 부착된 와이어형 방전극의 형상에 따른 코로나 방전특성에 대한 연구

  • Published : 2006.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Electrostatic precipitators(EPs) have low pressure drop and high dust collection efficiency and are widely used for industrial dust collectors. The current-voltage characteristics, which are important to maintain high dust collection efficiency, depend on several factor: discharge electrode shape, gas flow property, dust loading etc. In this study, experiments are performed to investigate the current-voltage characteristics of the corona discharge of various electrode geometries and an empirical model is proposed to predict current-voltage characteristics of the corona discharge. The corona onset voltage correction coefficient$(\alpha)$ and the geometry correction coefficient$(k_g)$ are used to the conventional equation for wire-plate type discharge electrode. The corona onset voltages are -6.3kV and almost constant when the numbers of discharge pins are varied from 3 to 9. The length of discharge pins has very sensitive effects on the corona onset voltage. They are increased from -6.3 to -7.8kV when the discharge pin length are 8.5 and 4.5mm, respectively. The empirical model shows good agreement with experimental results and can predict the effects of discharge pin length and number.

Keywords

References

  1. Moor, A. D., 1973, Electrostatics and its Applications, John Wiley & Sons, New York, p. 194
  2. Lee, J. B., Bae, G. N. and Hwang, J., 2000, 'Effect of Secondary Flows on the Particle Collection Efficiency in Single Stage Electrostatic Precipitator,' Transactions of the KSME B, Vol. 24, No.2, pp. 251-259
  3. Noh, K. C., Lee, Y. H. and Oh, M. D., 2003, 'Generation Characteristics of Ozone and NOx and Particle Removal in the Electrostatic Precipitators,' Transactions of the KSME B, Vol. 27, No. 10, pp. 1442-1449 https://doi.org/10.3795/KSME-B.2003.27.10.1442
  4. Jedrusik, M., Gajewski, J. B. and Swierczok, A. J., 2001, 'Effect of the Particle Diameter and Corona Electrode Geometry on the Particle Migration Velocity in Electrostatic Precipitators,' Journal of Electrostatics, Vol. 51-52, pp. 245-251 https://doi.org/10.1016/S0304-3886(01)00047-X
  5. Miller, J., Hoferer, B. and Schwab, A. J., 1998, 'The Impact of Corona Electrode Configuration on Electrostatic Precipitator Performance,' Journal of Electrostatics, Vol. 44, pp. 67-75 https://doi.org/10.1016/S0304-3886(98)00024-2
  6. Brocilo, D., Chang, J. S., Findlay, R. D., Kawada, Y. and Ito, T., 2001, 'Modelling of the Effect of Electrode Geometries on the Corona Discharge Current-Voltage Characteristic for Wire-Plate Electrostatic Precipitators,' Annual Report Conference on Electrical Insulation and Dielectric Phenomena, pp. 681-684 https://doi.org/10.1109/CEIDP.2001.963637