Effect of partition plate on dispersion of suspended solid particles in multistage bubble columns
Journal of Chemical Engineering of Japan
The movement of solid particles through the partition plate was investigated in a multistage bubble columnwith continuous flow of liquid containing suspended solid particles. A mathematical model for use in predicting the solid concentration difference through the partition plate was derived on the basis of theoretical consideration of factors controlling the flow of liquid with suspended solid particles through the plate. Using experimentally observed data of solid concentration distribution
... tion distribution in gas and slurry cocurrent up flow multistage bubble columns of 10 and 20cm in diameter, model parameters governing the solid concentration difference through the partition plate were correlated with the operating conditions. The transition of solid concentration profile within the column from a stepwise distribution at zero and/or low liquid flow rate, to a sawtoothed one at high liquid flow rate was interpreted by applying the model. From observed values of the gas holdup, the slip velocity of gas against liquid in the multistage bubble column was also correlated with the operating conditions. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN Characteristic behavior of cubic equations of state was analyzed through the utilization of a generalized expression involving two adjustable parameters u and w. A possible approach for developing a new equation or modifying an existing equation for a specific purpose was presented. For illustration, two three-parameter equations (one for general purpose (3PR) and the other for representing specifically saturated liquid volumes (3VL)) were proposed and evaluated.