高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (7): 1122.

• 研究简报 • 上一篇    下一篇

渗透蒸发脱盐的研究

彭平, 张晓玲, 李效东   

  1. 国防科学技术大学材料科学系, 长沙, 410073
  • 收稿日期:1994-11-30 修回日期:1995-03-16 出版日期:1995-07-24 发布日期:1995-07-24
  • 通讯作者: 彭平,女,29岁,硕士,讲师.
  • 作者简介:彭平,女,29岁,硕士,讲师.
  • 基金资助:

    湖南省科学技术委员会重点攻关项目资助

Studies on Desalination by Pervaporation

PENG Ping, ZHANG Xiao-Ling, LI Xiao-Dong   

  1. Department of Material Science, National University of Defence and Technology, Changsha, 410073
  • Received:1994-11-30 Revised:1995-03-16 Online:1995-07-24 Published:1995-07-24

PDF (PC)

被引次数

3

摘要： 将选择性透过膜和汽化相结合的分离过程是当前的研究热点,其中采用低热导率、疏水性多孔膜的过程称膜蒸馏,而采用非多孔性半透膜的过程则称渗透蒸发。将该分离过程用于盐水脱盐已有很多报道,并已建成中试设备,但采用的大多是膜蒸馏,所用膜的成本很高。本文研究制了一种价廉并带有致密层的非对称性含钠离子聚乙烯醇(PVA)-聚乙二醇(PEG)分离膜,并用该膜对渗透蒸发脱盐进行了初步研究。

关键词: 渗透蒸发, 脱盐, 膜

Abstract: Desalination by pervaporation was investigated, in which an asymmetric membrane with non-porous layer was used. This kind of membrane was prepared from alloy of PVA and PEG crosslinked by aldehydes and sodium salt. The desalination of 3.5% and 8% NaCl solution with the membrane by pervaporation at 55℃ and 5. 00 kPa(downstream pressure) resulted in the single-stage salt rejection of 99% and the water flux of 14 kg/h·m2. The concentration of NaCl solution has a bit of effect on seperation properties.

Key words: Pervaporation, Desalination, Membrane

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