液-液-液三相体系的相分散与分相特性  

Dispersion and Phase Separation Characteristics of Liquid-Liquid-Liquid Systems

作　　者：余潜[1,2] 禹耕之[1] 杨超[1] 毛在砂[1] 

机构地区：[1]中国科学院过程工程研究所,北京100080 [2]中国科学院研究生院

出　　处：《过程工程学报》2007年第2期229-234,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金(编号:202360502030602820490206);中国石油天然气股份有限公司资助项目:国家重点基础研究发展规划(973)基金(编号:2004CB217604)

摘　　要：以包含双油相和单水相的液-液-液三相体系为对象,利用编程控制的CCD照相系统,考察了搅拌槽内不同操作条件下液-液-液三相体系的相分散及分相情况．实验结果表明,桨型对三相体系的分散情况有较大影响,径流桨的分散效果优于轴流桨,下推式轴流桨优于上推式轴流桨;各相体积比的改变会导致不同的相分散形式;不同相分散形式的分相过程也不相同,实验中体系的分相过程可以分为凝并界面水平型与无规则型两种典犁情况,分别对应两种不同的相分散形式;采用分相数学模型,可成功预测凝并界面水平型分相过程中各界面的高度随时间的变化．A liquid-liquid-liquid system of two oil phases and one aqueous phase was prepared. The dispersion and phase separation of the triple-liquid phase system in an agitated tank were recorded with a CCD camera system. The results show that different types of impeller have different dispersion abilities. Radial impeller is better in phase dispersion than that of axial impeller. For axial impeller, the dispersion ability of downward flow type is better than that of upward flow. The phase volume ratio has great influence on the dispersion pattern. The phase separation process of the triple-liquid phase system is classified into types A andB, based on the result of difference in the status of phase dispersion. A mathematic model is proposed to predict the type A phase separation process, and the results show that the prediction is consistent well with the experimental observation.

关 键 词：搅拌槽 液-液-液三相体系 临界分散转速 分相过程 

分 类 号：TQ03[化学工程]