Premium
Jet momentum dissipation at a grid of a large gas fluidized bed
Author(s) -
Behie L. A.,
Bergougnou M. A.,
Baker C. G. J.,
Bulani W.
Publication year - 1970
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450480211
Subject(s) - nozzle , froude number , momentum (technical analysis) , mechanics , jet (fluid) , dissipation , fluidized bed , materials science , physics , thermodynamics , flow (mathematics) , finance , economics
Rational scale‐up of fluidized beds to commercial size requires an understanding of the operation of the grid support plate. One aspect of grid behavior has been studied experimentally; namely, the momentum dissipation of vertical air jets within an 11 inch diameter bed of fluidized cracking catalyst. Nozzle diameters were varied from ¼ to 1½ in. and nozzle velocities from 50 to 300 ft./sec. The data have been found to fit a general correlation relating the normalized axial momentum of the jet to a modified Froude number. The significance of the correlation to the process and design engineer is briefly discussed.