The Dynamics of Dispersed Phase Hold-up in Liquid-Liquid Perforated Plate Extraction Column

Abstract

The experimental responses of dispersed phase that stayed on the liquid-liquid perforated plate column were obtained for step change in dispersed phase flow rate by using water (continuous phase)-kerosene (dispersed phase) system. The column consisted of three plates and each diameter was 8cm i. d. and plate spacing was 30cm long.
The deviations and the time constants of the top plate hold-up are larger than that for the other plates. The phenomenon of inverse response is found out in the top plate. The free area of the perforated plate and the pressure drop due to the outlet flow of continuous and dispersed phases influence upon the responses. Especially, the pressure drop due to outlet flow of continuous phase much influences the response patterns.