Influence of Distributor Types on the Fluidizing Characteristics of a Tapered-Fluidized Bed

The effect of a change in pressure drop in a distributor on the fluidizing characteristics in a tapered bed was investigated by measuring the pressure drop in the bed and the volume mean diameter of the bubbles. These measurements indicated that the volume mean diameter of the bubbles could be estimated with the magnitude of pressure fluctuation in the bed. In addition, a larger pressure drop in gas distributors was found to result in a smaller pressure fluctuation in the beds. Finally, the magnitude of the pressure fluctuation and the averaged pressure drop were found to be the important indices to characterize the fluidizing state of the powder beds.