泡沫相塔壁对泡沫分离牛血清蛋白分离性能的影响  

Effect of column wall with foam phase on foam separation performances for bovine serum albumin

作　　者：卢珂[1] 吴兆亮[1] 侯凯湖[1] 赵艳丽[1] 刘亚君[1] 杜晓丹[2] 

机构地区：[1]河北工业大学化工学院,天津300130 [2]中国天辰工程有限公司,天津300400

出　　处：《化工学报》2012年第6期1765-1772,共8页CIESC Journal

基　　金：河北省自然科学基金项目(B2011202056)~~

摘　　要：为了强化泡沫排液,提出了泡沫相塔壁对泡沫分离性能影响的研究,为此设计了在泡沫相加内套筒的泡沫分离塔,以牛血清蛋白(BSA)为研究体系,研究泡沫相塔壁对出口持液量、气泡大小、富集比和回收率的影响,从而研究这种泡沫分离塔的泡沫分离性能。结果表明与没有加内套筒的对照塔相比,加内套筒的实验塔降低了持液量,加速了泡沫的变大和聚并,提高了BSA富集比。在400ml.min-1气速下,BSA初始浓度为0.2g.L-1时,实验塔的富集比是对照塔BSA富集比的2.06倍。BSA富集比随着加入内套筒长度的增加而增加。实验塔取得较好的泡沫分离性能表明了塔壁处的普拉特边界排液量大于气泡间的普拉特边界排液量,内套筒的加入增加了塔壁的普拉特边界数量,起到了强化排液的作用。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.

关 键 词：泡沫分离 塔壁 持液量 排液 富集比 

分 类 号：TQ028.8[化学工程]