气升式外环流反应器结构特性对传质的影响  

The effects of structure characteristics of external airlift loop reactor on mass transfer behaviour

作　　者：刘永强[1] 李稳宏[1] 刘德华[2] 王军[1] 

机构地区：[1]西北大学化学工程学系,陕西西安710069 [2]清华大学化学工程学系,北京100086

出　　处：《西北大学学报（自然科学版）》2001年第2期139-142,共4页Journal of Northwest University（Natural Science Edition）

摘　　要：研究了气升式外环流反应器 ( EALR)结构特性 (高径比、喷嘴结构、喷嘴位置、两管中心距 )对气含率、液体体积传质系数的影响。得出了反应器的较优结构尺寸。在冷模试验优选出确定结构的EALR中进行了苏云金杆菌的发酵实验 ,与传统的机械搅拌罐相比 ,苏云金杆菌的发酵周期可缩短 9h左右 ,发酵水平可提高 35%。The effects of structure characteristics of external airlift loop reactor (EALR) on mass transfer behavior are studied. The parameters such as the ratio of height to diameter, the structure of air sparger, the location of air sparger and the distance between two pipes have effects on gas holdup and mass transfer of EALR. The optimum structure of reactor has been obtained and been used for fermentation of Bacillus Thuringensis. Compared with the traditional mechanical agitated fermentor, the cycle of fermentation in EALR is shortened by 9 hours and the cell concentration of broth is improved by 35%.

关 键 词：气升式外环流反应器 液体体积传质系数 气含率 结构特性 苏云金杆菌 机械搅拌罐 

分 类 号：TQ052.503[化学工程]