Abstract
A model for gas flow in spouted beds in totally conical contactors is described. The model is applied by establishing the streamtubes in the annular zone of the bed in direct relation to the geometry of the contactor and of the gas inlet. In each streamtube, the deviation from plug flow is described by means of a dispersion coefficient. The validity of the model is confirmed in an experimental system at pilot plant scale. The application requires knowledge of the bed height, of velocity profiles in the contactor and the use of a gaseous tracer. The value of dispersion coefficient ( D = 0.01 m 2 s −1 for the experimental system studied) is similar to that given in the literature for cylindrical spouted beds and is an intermediate value between dispersion coefficients for fixed and fluidized beds.
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