1976 Volume 2 Issue 4 Pages 355-359
When the particles were fluidized with gas in columns packed with open-end cylindrical screen packing, the lowest pressure drop of the gas distributor which was required for good fluidization was measured. This pressure drop is defined as the critical pressure drop for good fluidization. The critical pressure drop in a screen-packed fluidized bed is influenced by the minimum fluidized gas velocity, bed diameter and fraction of open area in the distributor plate. Empirical correlations for critical pressure drop in the packed fluidized bed were obtained.
When the particles were fluidized with gas under different fractions of open area in the gas distributor, the critical pressure drop decreased until a constant value was reached. This constant critical pressure drop is defined as the terminal critical pressure drop for good fluidization.
In this study, empirical correlations for critical pressure drop in these two regions were obtained. At the same time empirical correlation between the pressure drop of a perforated gas distributor and operating conditions was obtained.