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太阳能集热真空膜蒸发系统及其盐溶液浓缩试验

作者：施建杭，abuziedmostafaabd el-rady²，陈小洁²，陈水超²，张林²，贺高红¹，陈欢林²

单位： 1.大连理工大学精细化工国家重点实验室膜科学与技术研究开发中心，大连，116024 ；2.浙江大学膜与水处理技术教育部工程研究中心，杭州，310027

关键词：太阳能；真空膜蒸发；浓缩；浓盐水

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2014,34(4):56-60

摘要：

采用太阳能集热真空膜蒸发系统对高浓盐水进行蒸发浓缩试验研究，考察了温度，真空度以及盐水溶液浓度对浓缩效果的影响。结果表明：温度、真空度的提高均能增大膜通量；实验中聚四氟乙烯（PTFE）膜组件的最高膜蒸发浓缩通量可达3.94kg/m2h；其中盐水浓度能从7wt%蒸发浓缩至32wt%，不产生明显的结晶。太阳能集热装置能维持料液温度在60-80℃范围内，供热稳定性良好，具有放大应用前景。

High concentration brine was enriched by solar collector vacuum membrane evaporation. Simultaneously，the effects of feed temperature, permeate side vacuum and feed concentration on membrane evaporation was investigated. It was found that membrane evaporation flux would increase with the increasing of temperature or vacuum. The maximum evaporation flux was 3.94kg/m2h in the enrichment of brine by PTFE capillary membrane module, and brine was concentrated from 7wt% to 32wt% without significant crystallization. Test run shows: feed temperature could be maintained at 60 -80 ℃ by the heat provided by the solar collector; this system possesses good heat stability; there are good prospects for large-scale applications.

基金项目：

浙江省海水淡化重点创新团队自主设计项目（2011R09045-05）

作者简介：

施建杭（1991-），男，杭州市人，大连理工大学在读硕士研究生，主要从事膜分离技术应用研究。*通讯作者，电话：0571-87953802，E-mail：chenhl@zju.edu.cn

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