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KSME International Journal

, Volume 16, Issue 10, pp 1336–1345 | Cite as

Triboelectrostatic separation system for separation of PVC and PS materials using fluidized bed tribocharger

  • Jae-Keun Lee
  • Jin-Hyouk Shin
  • Yoo-Jin Hwang
Article
  • 169 Downloads

Abstract

A triboelectrostatic separation system using a fluidized bed tribocharger for the removal of PVC material in the mixture of PVC/PS plastics is designed and evaluated as a function of electric field strength, air flow rate, and the mixing ratio of two- component mixed plastics. It consists of a fluidized-bed tribocharger, a separation chamber, a collection chamber and a controller. PVC and PS particles can be imparted negative and positive surface charges, respectively, due to the difference in the work function values of plastics suspended in the fluidized-bed tribocharger, and can be separated by passing them through an external electric field. Experimental results show that separation efficiency is strongly dependent on the electric field strength and particle mixing ratio. In the optimum conditions of 150 lpm air flow rate and 2.6 kV/cm electric field strength a highly concentrated PVC (99.1%) can be recovered with a yield of more than 99.2% from the mixture of PVC and PS materials for a single stage of processing.

Key Words

PVC/PS Electrostatic Separation Tribocharger Extract Content Yield Air Flow Rate Electric Field Strength Mixing Ratio 

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References

  1. Briick, R., 1981, “Chemische Konstitution und elektrostatische Eigenschaften von Polymeren,”Kunststoffe, Vol. 4, No. 71, p. 234.Google Scholar
  2. Davies, D. K., 1969, “Static Electrification,”Inst. Phys. Conf. Series., Vol. 4, p. 29.Google Scholar
  3. Fomenko, V. S., 1972,Emission Properties of Materials, NTIS-JPRS-56579, U.S. Department of Commerce.Google Scholar
  4. Fraas, F., 1962,Electrostatic Separation of Granular Materials, Bulletin 603, Bureau of Mines, United States Department of the Interior.Google Scholar
  5. Greason, W. D. and Inculet, I. I., 1975, “Insulator Work Function Determination From Contact Charging with Metals,”IEEE-IAS Annual Conf. Proceedings, Vol. 1, p. 428.Google Scholar
  6. Harper, W. R., 1967, “Contact and Frictional Electrification,”Clarendon Press, Oxford. Google Scholar
  7. Henry, P. S. H., 1953,Brit. J. Appl. Phys., Suppl., Vol. 2, p. 56.Google Scholar
  8. Inculet, I. I., Castle, G. S. P. and Brown, J. D., 1994, “Tribo-Electrification System for Electrostatic Separation of Plastics,”IEEE-IAS Annual Conference Proceedings, Vol. 1, p. 1397.Google Scholar
  9. Kelly, E. G. and Spottiswood, D. J., 1989, “The Theory of Electrostatic Separations: A Review Part II. Particle Charging,”Minerals Engineering. Vol. 2, pp. 193–205.CrossRefGoogle Scholar
  10. Kim, N. H., Lee, Y. P., Yoon, Y. S. and Jng, J. S., 1996, “A Study on the Pressure Loss, Heat Transfer Enhancement and Fouling Control in a Vertical Paniculate Flow,”KSME International, Vol. 10, No. 4, pp. 450–457.Google Scholar
  11. Lee, J. K., Kim, S. C., 2001, “Electrostatic Beneficiation of Coal Fly Ash Utilizing Tribo-electric Charging with Subsequent Electrostatic Separation,”KSME International, Vol. 15, No. 6, pp. 804–812.Google Scholar
  12. Matsushita, Y., Mori, N. and Sometani, T., 1999, “Electrostatic Separation of Plastics by Friction Mixer with Rotary Blades,”Electrical Engineering in Japan, Vol. 127, No. 3, p. 33.CrossRefGoogle Scholar
  13. Mukherjee, A., 1987,Characterization and Separation of Charged Particles, Ph. D. Dissertation. Illinois Institute of Technology.Google Scholar
  14. Pearse, M. J., Hickey, T. J., 1978, “The Separation of Mixed Plastics Using a Dry, Triboelectric Technique,”Resource Recovery and Conservation, Vol. 3, p. 179.CrossRefGoogle Scholar
  15. Takeshita, T., Atsumi, K., Iwasaki, Y. and Harada, T., 1998, “The Triboelectric Separation for Plastic Sheets,”J. Soc. Powder Technol., Japan, Vol. 35, p. 106.Google Scholar

Copyright information

© The Korean Society of Mechanical Engineers (KSME) 2002

Authors and Affiliations

  1. 1.School of Mechanical EngineeringPusan National UniversityPusanKorea

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