Monitoring Fluidization Dynamics for Detection of Changes in Fluidized Bed Composition and Operating Conditions

[+] Author and Article Information
J. Ruud van Ommen, Cor M. van den Bleek

Delft University of Technology, Chemical Reactor Engineering Section, Julianalaan 136, 2628 BL Delft, The Netherlands

Jaap C. Schouten

Eindhoven University of Technology, Laboratory of Chemical Reactor Engineering, P.O. Box 513, 5600 MB Eindhoven, The Netherlands

J. Fluids Eng 121(4), 887-894 (Dec 01, 1999) (8 pages) doi:10.1115/1.2823551 History: Received September 24, 1998; Revised July 06, 1999; Online December 04, 2007


In many industrial applications of gas-solids fluidized beds, it is worthwhile to have an on-line monitoring method for detecting changes in the hydrodynamics of the bed (due for example to agglomeration) quickly. In this paper, such a method, based on the short-term predictability of fluidized bed pressure fluctuations, is examined. Its sensitivity is shown by experiments with small step changes in the superficial gas velocity and by experiments with a gradual change in the particle size distribution of the solids in the bed. Furthermore, it is demonstrated that the method is well able to indicate if a stationary hydrodynamic state has been reached after a change in the particle size distribution (a ‘grade change’).

Copyright © 1999 by The American Society of Mechanical Engineers
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