Particle Motion in Rotary Screen
Publication: Journal of Engineering Mechanics
Volume 118, Issue 3
Abstract
Rotary screens are an important unit operation in materials processing. Much of their design has been empirical. Herein, a mathematical model is developed with three major components: particle rise on the screen, particle trajectory through the air, and screening of the particle while in contact with the screen. All were implemented on a computer using numerical methods, allowing use of the original theoretical expressions with simplifications for solvability. Particle rise incorporates friction; particle trajectory incorporates drag. The screening element makes use of an entirely new probabilistic theory that differs from previous work by immediately considering the depth of the bed. Results show very good predictive capabilities. Analysis shows the delicate nature of rotational velocity, the significance of drag on the particles in terms of particle density and airflow in the trommel, and the importance of the coefficient of friction.
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References
1.
Alter, H., Gavis, J., and Renard, M. L. (1980). “Design models of trommels for resource recovery processing.” Proa, 1980 Nat. Waste Processing Conf., American Society of Mechanical Engineers, New York, N.Y., 361–371.
2.
Barton, J. R. (1985). “Fuel recovery from waste: A review of UK technology.” Proc., Meeting Refuse Derived Fuel—Prospects for the Industrial User, Institute of Energy and Institute of Chemical Engineering, Newcastle‐upon‐Tyne, U.K.
3.
Everett, J., and Peirce, J. J. (1985). “Bound glass in shredded municipal solid waste.” J. Energy Engrg., ASCE111(1), 91–94.
4.
Gaudin, A. M. (1939). Principles of mineral dressing. McGraw‐Hill, New York, N.Y.
5.
Glaub, J. C., Jones, D. B., and Savage, G. M. (1982a). “The design and use of trommel screens for processing municipal solid waste.” Proc. 1982 Nat. Waste Processing Conf., American Society of Mechanical Engineers, New York, N.Y., 447–457.
6.
Glaub, J. C., Jones, D. B., Tleimat, J. U., and Savage, G. M. (1982b). Trommel screen research and development for applications in resource recovery. United States Department of Energy, Washington D.C.
7.
Glaub, J. C., Jones, D. B., and Savage, G. M. (1984). “Preparing municipal solid waste for composting.” BioCycle, 35(11), 32–36.
8.
Hasselriis, F. (1984). Refuse‐derived fuel processing. Butterworth Publishers, Boston, Mass.
9.
Reynolds, T. D. (1982). Unit operations and processes in environmental engineering. PWS Publishers, Boston, Mass., 74.
10.
Stessel, R. I., and Peirce, J. J. (1987). “Particle separation in pulsed airflow.” J. Engrg. Mech., ASCE, 113(10), 1594–1607.
11.
Vesilind, P. A., and Rimer, A. E. (1981). Unit operations in resource recovery engineering. Prentice‐Hall, Inc., Englewood Cliffs, N.J., 143–150.
12.
Vorstman, M. A. G., and Tels, M. (1981). “Some experiments in trommeling of particles in multilayers.” Materials and Energy from Refuse: Proc., 2nd Int. Symp., Koninklijke Vlaamse Ingenieursvereniging, Antwerp, 1.27–1.34.
13.
Wheeler, P. A., Barton, J. R., and New, R. (1989). “An empirical approach to the design of trommel screens for fine screening of domestic refuse.” Resour., Conservation, and Recycling, 1989(2), 261–273.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 118 • Issue 3 • March 1992
Pages: 604 - 619
Copyright
Copyright © 1992 ASCE.
History
Published online: Mar 1, 1992
Published in print: Mar 1992
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