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Study on submerged vacuum membrane distillation for desalination by using PTFE hollow fiber membrane

Authors： HongjieWang1Hailin Zhu1 YuhaiGuo1*Yier Wu2Wangyong Jin2Huapeng Zhang1Jianyong Chen1

Units： 1 Zhejiang Sci-Tech University Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Hangzhou 310018

KeyWords： PTFE hollow fiber membrane; submerged vacuum membrane distillation; desalination

ClassificationCode：TB324

year,volume(issue):pagination： 2013,33(5):54-58

Abstract：

The Polytetrafluoroethylene (PTFE) hollow fiber membranes with two wall thicknesses were prepared through changing the parameters of extrusion head in this paper. The effect of wall thickness, operational conditions and NaCl concentration of water solution on the permeate flux and salt rejection were investigated by means of submerged vacuum membrane distillation (SVMD). The experimental results shows that the permeate flux increases with the decrease of wall thickness of PTFE hollow fiber membrane. The permeate flux significantly increases with the increase of fee temperature and vacuum pressure. The permeate flux can be enhanced after air-blowing the outer surface of PTFE hollow fiber membrane, and then drop till air blowing intensity is greater than 6m3/h*m2. The 800 hours test shows that the permeate flux decreases with the extension of working time. After 200 hours, a constant stable water flux is attained with a salt rejection over 99.6%.

Funds：

国家科技支撑计划（2013BAC01B01）、教育部新世纪优秀人才支撑计划（NCET-10-0980）、浙江省重大科技专项重大社会发展项目（2012C13006-2）、浙江理工大学博士启动基金（1113808-Y）

AuthorIntro：

王红杰（1987-），男，湖北武汉人；主要研究方向：PTFE中空纤维膜在海水淡化中的应用；E-mail：whj0623@126.com 郭玉海，通讯作者，E-mail：gyh@zstu.edu.cn

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