气液两相流在膜技术中的应用  

APPLICATIONS OF GAS-LIQUID TWO-PHASE FLOW PROCESS IN MEMBRANE TECHNOLOGY

作　　者：郭竹洁[1] 王枢[1] 任瑶瑶[1] 江南屏[1] 苏军达[1] 

机构地区：[1]西南交通大学生命科学与工程学院,四川成都610031

出　　处：《水处理技术》2011年第3期18-23,共6页Technology of Water Treatment

基　　金：国家自然科学基金项目(20706046)

摘　　要：针对膜技术应用中的污染问题,从强化膜分离以及膜清洗两个方面,讨论气液两相流对膜污染的控制作用。两相流在膜组件内一般形成弹状流提高膜面剪切力,或通过增加反冲效果以有效控制膜污染。较系统地阐述了气液两相流在强化膜分离及膜清洗过程中的机理,以及在管式、平板式、中空纤维和卷式膜组件中的具体应用。总结了影响气液两相流效果的主要因素,以及在应用中的优势与不足。并对两相流在大分子物质分级中的应用,以及未来向高效、低能耗、优化膜组件结构等方向的发展做出展望。Membrane fouling occurring in the membrane process is known to be the major limitation to the membrane technology applications. The gas-liquid two-phase flow process has been validated effectively for controlling the membrane fouling on two aspects, enhanced membrane separation performance and the membrane cleaning. The two phase flow process enhanced transient shear profiles by generating slug flow within membrane modules, or increased back flush performance. This paper reviews the principles of this technique and focuses on its applications in the tubular, flat sheet, hollow fiber and spiral modules. The application to fractionation of macromolecules has been presented and the new promising aspects towards efficiency, energy saving, membrane module optimization of two phase flow process have also been prospected.

关 键 词：气液两相流 膜分离 膜清洗 膜组件 弹状流 

分 类 号：TQ028.8[化学工程]