Scale effects in gas-liquid-solid fluidization

Abstract

Hydrodynamic parameters of gas-liquid-solid three-phase fluidization are investigated. The experimental study was carried out in a cloumn, 152 mm in diameter with several gas-distributors, using glass beads and water which was made less coalescent in some cases. The results dbtained with water, together with other results from the literature, are interpreted by means of a technique for predicting the holdups of phases, which combines bubble-wake models with a correlation for the slip velocity. The effect which the coalescence-inhibiting behavior of the liquid can have is pointed out. A very simple new model is proposed for large-sized particles and particles of low density.