膜科学与技术

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Air gap membrane distillation process based on hollow fiber powered by solar energy for seawater desalination

Authors：

XUE Xidong1, WANG Jianyou1, WANG Jihu2, LIU Hongbin2, ZHANG Zhenhui1, YANG Jianxin1, Li Boyi1

Units： 1 College of Environmental Science and Engineering，Nankai University，Tianjin 300071，China；2 Institute of Medical Equipment，Academy of Military Medical Sciences，Tianjin 300161，China

KeyWords： solar energy；air gap membrane distillation；hollow fiber membrane module； desalination

ClassificationCode：P747.14；TQ028.3

year,volume(issue):pagination： 2016,36(4):126-133

Abstract：

A small solar membrane distillation seawater desalination system was designed, a new spiral-wound air-gap membrane distillation module based on hollow fiber (SW-AGMD-HF) was used as the core unit. The effects of water flow rate, start-up temperature of membrane distillation and weather on this distillation system were studied with the 3.5 wt% modeling seawater as the feed. The experimental results showed that water production would decrease as the higher feed rate was applied, the start-up temperature showed a slight influence on water production, while weather had a great influence on water production. All those factors had little effect on the conductivity of water production. The average daily efficiency of solar collector was 30% on sunny in summer. When the collector area was 15 m2, membrane area was 1.56 m2, hot water flow rate was 90 L•h-1, start-up temperature was 50 ℃, the highest water production was 44.3 L, the ratio of ion removal reached 99.9%. Consequently, solar membrane distillation takes full advantage of solar energy, the quality of water production is perfect, it is expected to become a new type of seawater or brackish desalination technology, which can provide reliable drinking water for small islands or remote areas.

Funds：

天津市科技兴海专项资金项目（KJXH2013-02）；天津市科技特派员项目(14KJTPJC00481)

AuthorIntro：

第一作者简介：薛喜东（1989-），男，陕西延安市人，硕士研究生，南开大学，从事膜分离与水处理研究. *通讯作者，E-mail：Wangjy72@nankai.edu.cn

Reference：

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