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Experiment study on advection multi-effect vacuum membrane distillation（ME-VMD）process

Authors： Zhang Yonggang, Peng Yuelian, Ji Shulan

Units： Beijing Key Laboratory for Green Catalysis and Separation, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, P. R. China

KeyWords： advection; multi-effect; vacuum membrane distillation; gained output ratio; thermal efficiency; transmembrane flux

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(6):11-18

Abstract：

An experimental investigation was carried out by using advection multi-effect vacuum membrane distillation (ME-VMD) system containing hydrophobic PTFE hollow fiber membrane and PTFE capillary heat exchanger. The effect of feed temperature, feed velocity and vacuum degree on the transmembrane flux, thermal efficiency and gained-output-ratio (GOR) were investigated. The experimental results show that the temperature difference loss increases with the increase of feed temperature, and decreases with the increase of the effect number. The best effect number has a direct relationship with the feed temperature. High feed temperature, low flow rate and the high vacuum degree contribute to the improvement of transmembrane flux, water yield and GOR. The thermal efficiency increases with the increase of feed temperature and vacuum degree and declines with the increase of feed velocity. When the feed temperature, the feed velocity and the absolute pressure at the permeate side is 90℃, 0.30m/s and 3kPa, respectively, four effect ME-VMD can be used, and the GOR can get to 2.15.

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AuthorIntro：

第一作者简介：张永刚（1976-），男，山东德州人，博士研究生，研究方向为膜蒸馏技术及应用，E-MAIL：yongganga@126.com.?通讯作者，E-mail:pyl@bjut.edu.cn

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