膜科学与技术

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Experimental study of the hydrophobic PTFE membrane used in membrane distillation for brackish water desalination

Authors： LV Haili, TIAN Rui, YANG Xiaohong, MA Sujuan

Units： College of Energy and Power Engineering, Inner Mongolia University of Technology, Huhhot 010051, China

KeyWords： hydrophobic membrane; permeate flux; Membrane module; membrane fouling

ClassificationCode：TQ 028. 8

year,volume(issue):pagination： 2012,32(1):71-75

Abstract：

The domestic PTFE hydrophobic membranes were employed in the brackish water desalination experiment by multi parallel type air-gap membrane distillation, using tap-water and Salt solution as testing solution. The desalination performances of membranes were compared. Simultaneously, the effects of the temperature, flow and concentration of the feed solution on the flux of MD processes, the stability of membrane flux, membrane fouling were studied. The results show that the flux and conductivity of membrane 4 # are stable in the tap water and salt water experiments for long-term, especially in the later experiments, the flux of membrane 4 # is the largest .The flux of the membrane 1# which has larger aperture and thinner coating is larger in previous experiments, but the flux decline with the running time, especially in the salt water experiments, the rejection of inorganic salt solutes is low, and the conductivity is high, so it is not suitable for using in brackish water desalination. On the whole, the performance of the membrane 4 # is better. The membrane fouling is serious after the experiment, yellow sediment can be found on the membrane surface.

Funds：

国家自然科学基金资助项目（50766002）；内蒙古自然科学基金 (2010ZD09)

AuthorIntro：

吕海莉(1983-)，女，乌兰察布市四子王旗人，硕士，主要从事膜蒸馏技术应用研究。联系电话:15047886874,E-mail:lvhaili83@126.com. 联系人:田瑞，联系电话:13947159765，E-mail: tianr@imut.edu.cn

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