PTFE膜的膜组件设计对去除氨氮传质性能的影响  

Effects of PTFE Membrane Module Design on Removal of Ammonia Nitrogen Mass Transfer Performance

作　　者：代百会 唐红艳[1,2] 郭玉海[1,2] 李玖明[1] 蔡浩鹏[2] 

机构地区：[1]浙江理工大学纤维材料和加工技术浙江省重点实验室,杭州310018 [2]浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2015年第3期326-330,共5页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家科技支撑计划(2013BAC01B01);浙江省重大科技专项重大社会发展项目(2013C01055);浙江省高校重中之重学科开放基金;浙江省新苗人才计划项目(2013R406031)

摘　　要：采用"挤出—拉伸—烧结"法制备聚四氟乙烯(PTFE)中空纤维膜,并用膜吸收法去除废水中的氮氨。主要研究PTFE中空纤维膜的膜组件设计(装填密度、膜丝长度、放置方式、运行方式)对去除氨氮过程中传质性能的影响。结果表明:存在一个最佳的装填密度使氨氮传质系数最大,同时又有很高的脱除率;膜组件的有效长度越长,氨氮传质系数越小,脱除率越大;膜组件的放置方式对氨氮传质基本无影响,料液走壳程优于料液走管程。In this study, Polytetrafluoroethylene （PTFE） hollow fiber membranes were prepared through the process of ＂extrusion-stretching-sintering＂. Membrane absorption method was used to remove ammonia nitrogen in the waste water. Effects of membrane module design of PTFE hollow fiber membranes （packing density, membrane length, placement mode, and running mode） on mass transfer performance in ammonia nitrogen removal process were studied. The results show that there exists a best packing density to make the ammonia mass transfer coefficient largest, meanwhile the removal rate is high; effective length of membrane module is longer, ammonia nitrogen mass transfer coefficient is smaller, removal rate is larger; the placement modes of membrane module almost have no effect on the ammonia mass transfer process; feed liquid running through the shell is superior to feed liquid running through the pipe.

关 键 词：PTFE中空纤维膜 传质系数 脱除率 装填密度 废水 氨氮 

分 类 号：TQ028.8[化学工程]