关键词: 泡沫分离, 塔壁, 持液量, 排液, 富集比

Abstract: In order to enhance foam drainage,the column with an inner foam sleeve was designed to study the effect of column foam wall on separation performances for bovine serum albumin(BSA).The effects of foam wall on the liquid holdup at exit,bubble size,enrichment ratio and recovery efficiency were investigatedThe results indicated that compared with without inner sleeve,addition of inner sleeve decreased the liquid holdup,accelerated coarsening and coalescence of bubbles and increased enrichment ratio of BSAUnder the conditions of initial concentration of BSA 02 g·L-1,air flow rate 400 ml·min-1,the experimental column achieved up to a 206 fold increase in enrichment ratioThe enrichment of BSA went up with increase of inner sleeve lengthTheoretical analysis showed that ratio of exterior to interior channels enlarged with the increase of bubble diameterSo,the experiment column could obtain better performances at lower concentration and air flow rate,showing that the drainage rate was greater for plateau borders on wall than between bubblesTherefore the inner sleeve could provided more plateau borders on wall and improved foam drainage.

Key words: foam fractionation, column wall, liquid holdup, drainage, enrichment