On partial fluidization in rotating fluidized beds

Journal Article · Fri May 01 00:00:00 EDT 1987 · A.I.Ch.E. J.; (United States)

DOI:https://doi.org/10.1002/aic.690330520· OSTI ID:5483144

Kao, J; Pfeffer, R; Tardos, G I

In a rotating fluidized bed, unlike in a conventional fluidized bed, the granules are fluidized layer by layer from the (inner) free surface outward at increasing radius as the gas velocity is increased. This is a very significant and interesting phenomenon and is extremely important in the design of these fluidized beds. The phenomenon was first suggested in a theoretical analysis and recently verified experimentally in the authors' laboratory. However, in the first paper, the equations presented are too cumbersome and the influence of bed thickness is not clearly stated. In this note the authors present simplified equations, based on that paper, for the pressure drop and the minimum fluidizing velocities in a rotating fluidized bed. Experimental data are also shown and compared with the theoretical model, and the effect of bed thickness is shown. Furthermore, an explanation for the observation of a maximum in the pressure drop vs. velocity curve instead of the plateau derived by Chen is proposed.

• Research Organization: Dept. of Chemical Engineering, City College, City Univ. of New York, New York, NY 10031
• OSTI ID: 5483144
• Journal Information: A.I.Ch.E. J.; (United States), Vol. 33:5
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
42 ENGINEERING
FLUIDIZED BEDS
HYDRODYNAMICS
PARTICULATES
FLUIDIZATION
EQUATIONS
GAS FLOW
MATHEMATICAL MODELS
PRESSURE DROP
ROTATION
FLUID FLOW
FLUID MECHANICS
MECHANICS
MOTION
PARTICLES
400201* - Chemical & Physicochemical Properties
420400 - Engineering- Heat Transfer & Fluid Flow