真空度对膜法溶解氧解吸过程传质性能的影响  

The effects of vacuum degree on the mass transfer performance in removing dissolved oxygen by membrane desorption

作　　者：常李静[1] 刘丽英[1] 丁忠伟[1] 杨祖荣[1] 马润宇[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《膜科学与技术》2007年第2期7-10,38,共5页Membrane Science and Technology

基　　金：国家自然科学基金资助项目(20206003);国家973计划资助项目(2003CD61570)

摘　　要：采用中空纤维膜组件对水中溶解氧脱除进行了实验研究,测定了不同操作条件下溶解氧浓度随时间的变化关系,重点考察了真空度对中空纤维膜组件传质系数的影响,并获得了传质准数关联式.研究结果表明,系统真空度对水中溶解氧的传递过程有重要影响,且真空度越高,溶解氧脱除效果越明显,传质系数越大,并进一步影响传质准数关联式.The removal of disolved oxygen （DO） from water was experimentally studied, using a hollow fiber membrane module. In the experiments, the relation of DO concentration with time under various operating conditions was directly obtained. Based on these results, the relevant overall mass transfer coefficients and their correlations were evaluated. It was found that the vacuum degree has important influence on mass transfer of DO, and the mass transfer coefficient increases evidently with the vacuum degree increasing. This factor was included in building the correlation of mass transfer coefficient.

关 键 词：真空 膜解吸 脱氧 传质性能 

分 类 号：TQ028.8[化学工程]