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Influence of Particle and Filter Charge on Filtration Property of Air Filter under Particle Loading

입자 및 필터 대전상태에 따른 입자부하조건에서 공기정화 필터의 여과특성

  • Ji, Sung-Mi (Department of Environmental Health, Korea University) ;
  • Sohn, Jong-Ryeul (Department of Environmental Health, Korea University) ;
  • Park, Hyun-Seol (Climate Change Research Division, Korea Institute of Energy Research)
  • 지성미 (고려대학교 환경보건학과) ;
  • 손종렬 (고려대학교 환경보건학과) ;
  • 박현설 (한국에너지기술연구원 기후변화연구본부)
  • Received : 2012.10.02
  • Accepted : 2012.10.23
  • Published : 2012.12.31

Abstract

As soon as a new air filter is applied to an air purification process, the filter gets loaded with dust particles. Thus, the study on the particle loading characteristics of air filter is very essential in order to understand the real filtration phenomena during filter use. In this study, we investigated the effect of particle and filter charge on the particle loading property of air filter. Charged filter and uncharged filter prepared by discharging the charged filter by isopropyl alcohol were used as test samples, and three types of particle having different charge states were supplied to filters tested. For neutralized particles there was a big difference in areal mass loading rates between charged and uncharged filters due to the very small amount of particle charge, on the other hand the difference was diminished for atomized particle and finally almost vanished for corona charged particles. The pressure drop of filter loaded with corona charged particles was only half of those for neutralized and atomized particles at the same areal mass loading because of the porous structure of particle deposit formed on filter fibers, caused by the space charge effect between particles.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. Alguacil, F.J. and M. Alonso (2006) Multiple charging of ultrafine particles in a corona charger, J. Aerosol Sci., 37, 875-884. https://doi.org/10.1016/j.jaerosci.2005.08.007
  2. Barrett, L.W. and A.D. Rousseau (1998) Aerosol loading performance of electret filter media, Am. Ind. Hyg. Assoc. Journal, 59, 532-539. https://doi.org/10.1080/15428119891010703
  3. Baumgartner, H. and F. Loffler (1987) Three-dimensional numerical simulation of the deposition of polydisperse aerosol particles on filter fibres - Extended concept and preliminary results, J. Aerosol Sci., 18, 885-888. https://doi.org/10.1016/0021-8502(87)90147-9
  4. Bhutra, S. and A.C. Payatakes (1979) Experimental investigation of dendritic deposition of aerosol particles, J. Aerosol Sci., 10, 445-464. https://doi.org/10.1016/0021-8502(79)90003-X
  5. Brown, R.C. (1993) Air Filtration: An Integrated Approach to the Theory and Applications of Fibrous Filters, Pergamon Press, Ltd.
  6. Brown, R.C. and D. Wake (1999) Loading filters with monodisperse aerosols: Macroscopic treatment, J. Aerosol Sci., 30, 227-234. https://doi.org/10.1016/S0021-8502(98)00042-1
  7. Brown, R.C., D. Wake, R. Gray, D.B. Blackford, and G.J. Bostock (1988) Effect of industrial aerosols on the performance of electrically charged filter material, Ann. Occup. Hyg., 32, 271-294. https://doi.org/10.1093/annhyg/32.3.271
  8. Donovan, R.P. (1985) Fabric Filtration for Combustion Sources: Fundamentals and Basic Technology, Marcel Dekker Inc.
  9. Emets, E.P., V.A. Kascheev, and P.P. Poluektov (1991) Simultaneous measurement of aerosol particle charge and size distributions, J. Aerosol Sci., 22, 389-394. https://doi.org/10.1016/S0021-8502(05)80015-1
  10. Forsyth, B., B.Y.H. Liu, and F.J. Romay (1998) Particle charge distribution measurement for commonly generated laboratory aerosols, Aerosol Sci. and Tech., 28, 489- 501. https://doi.org/10.1080/02786829808965540
  11. Hernandez-Sierra, A., F.J. Alguacil, and M. Alonso (2003) Unipolar charging of nanometer aerosol particles in a corona ionizer, J. Aerosol Sci., 34, 733-745. https://doi.org/10.1016/S0021-8502(03)00033-8
  12. ISO (2009) Particulate air filters for general ventilation-Determination of filtration performance, ISO/TS 21220, 1st Ed.
  13. Japuntich, D.A., J.I.T. Stenhouse, and B.Y.H. Liu (1994) Experimental results of solid monodisperse particle clogging of fibrous filters, J. Aerosol Sci., 25, 385- 393.
  14. Johnston, A.M. (1983) A Semi-automatic method for the assessment of electric charge carried by airborne dust, J. Aerosol Sci., 14, 643-655. https://doi.org/10.1016/0021-8502(83)90069-1
  15. Kanaoka, C. and S. Hiragi (1990) Pressure drop of air filter with dust load, J. Aerosol Sci., 21, 127-137. https://doi.org/10.1016/0021-8502(90)90027-U
  16. Kanaoka, C. and S. Hiragi (1994) Structure of particle accumulates on a cylindrical fiber in a fibrous air filter, Proceedings of the 12th ISCC in Yokohama, 59-62.
  17. Kanaoka, C., H. Emi, and T. Myojo (1980) Simulation of the growing process of a particle dendrite and evaluation of a single fiber collection efficiency with dust load, J. Aerosol Sci., 11, 377-389. https://doi.org/10.1016/0021-8502(80)90046-4
  18. Kousaka, Y. and K. Okuyama (1981) Measurement of electric charge of aerosol particles generated by various methods, J. Chem. Eng. of Japan, 14, 54-58. https://doi.org/10.1252/jcej.14.54
  19. Kwetkus, B.A. (1997) Particle precharging and fabric filtration - Experimental results of a corona precharger, J. of Electrostatics, 40&41, 657-662.
  20. Mori, Y., T. Shiomi, N. Katada, H. Minamide, and K. Iinoya (1982) Effects of corona precharger on performance of fabric filter, J. Chem. Eng. of Japan, 15, 211- 216. https://doi.org/10.1252/jcej.15.211
  21. Nielsen, K.A. and J.C. Hill (1980) Particle chain formation in aerosol filtration with electrical forces, AIChE Journal, 26, 678-679. https://doi.org/10.1002/aic.690260422
  22. Novick, V.J., P.R. Monson, and P.E. Ellison (1992) The effect of solid particle mass loading on the pressure drop of HEPA filters, J. Aerosol Sci., 23, 657-665. https://doi.org/10.1016/0021-8502(92)90032-Q
  23. Park, H.S., Y.W. Jung, Y.O. Park, and K.W. Lee (1999) Numerical simulation of particle deposition pattern on cylindrical fiber under external electrical field, J. of Korean Soc. for Atmos. Environ., 15, 41-51. (in Korean with English abstract)
  24. Payatakes, A.C. and C. Tien (1976) Particle deposition in fibrous media with dendrite-like pattern: A preliminary model, J. Aerosol Sci., 7, 85-100. https://doi.org/10.1016/0021-8502(76)90067-7
  25. Payatakes, A.C. and L. Gradon (1980) Dendritic deposition of aerosol particles in fibrous media by inertial impaction and interception, Chem. Eng. Sci., 35, 1083- 1096. https://doi.org/10.1016/0009-2509(80)85097-4
  26. Reist, P.C. (1993) Aerosol Science and Technology, 2ed., McGraw-Hill Book Co.
  27. Schmidt, E. (1996) Simulation of three-dimensional dust structures via particle trajectory calculations for cake-forming filtration, Powder Tech., 86, 113-117. https://doi.org/10.1016/0032-5910(95)03044-1
  28. Tien, C., C.-S. Wang, and D.T. Barot (1977) Chainlike formation of particle deposits in fluid-particle separation, Science, 196, 983-985. https://doi.org/10.1126/science.196.4293.983
  29. Walsh, D.C. and J.I.T. Stenhouse (1997a) Clogging of an electrically active fibrous filter material: experimental results and two-dimensional simulations, Powder Tech., 93, 63-75. https://doi.org/10.1016/S0032-5910(97)03260-9
  30. Walsh, D.C. and J.I.T. Stenhouse (1997b) The effect of particle size, charge, and composition on the loading characteristics of an electrically active fibrous filter material, J. Aerosol Sci., 28, 307-321. https://doi.org/10.1016/S0021-8502(96)00434-X
  31. Walsh, D.C. and J.I.T. Stenhouse (1998) Parameters affecting the loading behavior and degradation of electrically active filter materials, Aerosol Sci. and Tech., 29, 419-432. https://doi.org/10.1080/02786829808965580