膜科学与技术

用于膜蒸馏苦咸水淡化的PTFE疏水膜实验研究

作者：吕海莉，田瑞，杨晓宏，马淑娟

单位：内蒙古工业大学能源与动力工程学院，呼和浩特，010051

关键词：疏水膜；膜通量；膜组件；膜污染

出版年,卷(期):页码： 2012,32(1):71-75

摘要：

利用目前国内生产的PTFE疏水膜，以自来水、盐水溶液作工质进行了多层并接气隙式膜蒸馏实验，比较了几种膜的分离性能，研究了料液温度、料液流量、浓度对膜渗透通量的影响，各种膜的通量稳定性及污染情况。实验结果表明：4#膜在长期自来水、盐水实验中通量、电导率都较稳定，特别是在后期实验中，通量最大；而孔径大、涂层薄的1#膜在前期实验中通量较大，而随运行时间增长，通量有所下降，特别是盐水实验中，截留率低，电导率高，因此不适合淡化苦咸水用，综合来看4#膜性能较好。实验后各种膜表面的污染情况较严重，都有黄色沉积物。

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.

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

参考文献：

[1] 尚天宠.膜分离技术在中国西部省区苦咸水淡化工程中的应用[J].净水技术.2000,18(2):28-33.
[2] 郑凯,王长进,吴超亮,金江.膜蒸馏法分离乙醇水溶液的研究[J].水处理技术. 2009, 35(7):31-33.
[3] 赵　晶,武春瑞,吕晓龙.膜蒸馏海水淡化过程研究:三种膜蒸馏过程的比较[J].膜科学与技术. 2009, 29(1):83-88.
[4] 陈明玉,唐娜，袁建军. 膜蒸馏海水及苦咸水淡化研究进展[J]. 盐业与化工.2006,35(6):18-21.
[5] HonganPA，Sudjito， FaneAG，et al. Desalination by solar heated membrane distillation [J].Desalination.
1991，81:81-90.
[6] Fawzi Banat, Nesreen Jwaied, Matthias Rommel,
Performance evaluation of the “large SMADES” autonomous desalination solar-driven membrane distillation plant in Aqaba, Jordan [J].Desalination 217 (2007) 17–28.
[7] 阎建民，马润宇. 膜蒸馏过程中的膜污染研究[J]. 膜科学与技术.2001，21（3）：21-23.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com