On the Dynamics of Electrostatically Precipitated Fly Ash

[+] Author and Article Information
D. Juricic, G. Herrmann

Stanford University, Stanford, Calif.

J. Eng. Power 101(4), 584-591 (Oct 01, 1979) (8 pages) doi:10.1115/1.3446623 History: Received April 17, 1978; Online July 14, 2010


One of the factors influencing the efficiency of modern electrostatic precipitators is the proper cleaning of dust collecting plates, which is usually done by a periodic rapping. The rapping blow excites the plates, which in turn dislodge the accumulated dust layer. The paper analyzes the response of a deposited dust layer to an arbitrary out-of-plane motion of the plate to which it is held by the action of molecular and electrostatic adhesive forces. A simplified one-dimensional model of the precipitated dust-layer is assumed to have viscoelastic properties of the Kelvin solid. The results indicate that—in addition to the acceleration level—the frequency of excitation as well as the adhesive-force arrangement are decisive in defining how and when the dust layer will break off the plate.

Copyright © 1979 by ASME
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