LONGITUDINAL CONCENTRATION DISTRIBUTION OF SUSPENDED SOLID PARTICLES IN MULTI-STAGE BUBBLE COLUMNS

Abstract

The longitudinal concentration distribution of solid particles in 0.122- and 0.214-m i.d. multistage bubble columns was measured and analyzed by using a sedimentation-diffusion model with back-flow and the previously proposed empirical equations for single-stage bubble columns containing suspended solid particles and multi-stage bubble columns.
The mean settling velocity of solid particles through the partition plates was correlated with dimensionless groups. The values of concentration of solid particles in multi-stage bubble columns calculated from the proposed correlation and the previously proposed ones agreed with the observed values within ±30%.