Separation of Solid Waste with Pulsed Airflow
Publication: Journal of Environmental Engineering
Volume 111, Issue 6
Abstract
The concept and development of a new type of air classifier, the pulsed‐flow air classifier, are described. Field experience with air classifiers has indicated the need for re‐design. Careful examination of shredded material in light of the literature enables a coherent description of solid waste components. Analyses of fall times show why conventional air classifiers fail to separate adequately. The objective is to achieve separation based more on density and less on aerodynamic characteristics than is possible with current classifier technology. Based on these results and drawing from separation technology, the concept of pulsed‐flow air classification is developed. The theory is briefly examined and compared with previous work. Carefully controlled experimentation with specially constructed equipment shows that pulsed flow air classification is capable of separations by density of which conventional classifiers are not capable. The model is shown to aid design of such classifiers.
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References
1.
Connor, H. S., and Smith, M. L., “Recycling of Glass and Metals: Container Materials,” Recycling and Disposal of Solid Wastes, T. F. Yen, Ed., Ann Arbor Science, Ann Arbor, MI, 1974.
2.
Henrikson, R. A., A Descriptive Mathematical Model of Air Classification, Duke Environmental Center, Durham, NC, 1979.
3.
McNabb, M. B., Fundamental Aspects of Air Classifier Operation and Design: A New Test for Evaluation of Air Classifier Performance, Duke Environmental Center, Durham, NC, Oct., 1980.
4.
National Center for Resource Recovery, Resource Recovery from Municipal Solid Waste, Lexington Books, Lexington, MA, 1975.
5.
Niessen, W. R., “Properties of Waste Materials,” Handbook of Solid Waste Management, D. G. Wilson, Ed., Van Nostrand Reinhold Co., New York, NY, 1977.
6.
Peirce, J. J., Stessel, R. I., and Vesilind, P. A., “Quantifying the Performance of N‐Way Separators,” Resources and Conservation, Vol. 10, 1983, pp. 243–247.
7.
Peirce, J. J., and Wittenberg, N., “Zigzag Configurations and Air Classifier Performance,” Journal of Energy Engineering, Vol. 110, No. 1, Mar., 1984, pp. 36–48.
8.
Senden, M. M. G., “Performance of Zig Zag Air Classifiers at Low Particle Concentrations,” thesis presented to Eindhoven Univ. of Technology, at Eindhoven, The Netherlands, in 1978, in partial fulfillment of the requirements for the degree of Doctor of Engineering.
9.
Stanley Consultants, Resource Recovery from Municipal Solid Waste in Ohio, Ohio Environmental Protection Agency, Columbus, OH, 1975.
10.
Stessel, R. I., “Pulsed Flow Air Classification,” thesis presented to Duke Univ., at Durham, NC, in 1983, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
11.
Teledyne National, Specifications for Magnetic Separation Systems, Teledyne National, Northridge, CA, n.d.
12.
Trezek, G. J., Significance of Size Reduction in Solid Waste Management, Municipal Environmental Research Laboratory, US Environmental Protection Agency, Cincinnati, OH, 1977.
13.
US Environmental Protection Agency, Fourth Report to Congress: Resource Recovery and Waste Reduction, Washington, DC, 1977.
14.
US Environmental Protection Agency, Third Report to Congress: Resource Recovery and Waste Reduction, Washington, DC, 1975.
15.
Vesilind, P. A., and Rimer, A. E., Unit Operations in Resource Recovery Engineering, Prentice‐Hall, Inc., Englewood Cliffs, NJ, 1981.
16.
Wolf, B. A., “The Behavior of Particles in Pulsing and Non‐Pulsing Air Classifiers,” thesis presented to Duke Univ., at Durham, NC, in 1983, in partial fulfillment of the requirements for the degree of Master of Science.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 111 • Issue 6 • December 1985
Pages: 833 - 849
Copyright
Copyright © 1985 ASCE.
History
Published online: Dec 1, 1985
Published in print: Dec 1985
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