Membrane evaporators

被引：22

作者：

Nii, S ^{[1
]}

Jebson, RS ^{[1
]}

Cussler, EL ^{[1
]}

机构：

[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

来源：

JOURNAL OF MEMBRANE SCIENCE | 2002年 / 201卷 / 1-2期

关键词：

pervaporation; liquid permeability and separations; membrane distillation;

D O I：

10.1016/S0376-7388(01)00725-6

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

We have built and tested a flat-sheet membrane evaporator for removing water from dilute feed streams like milk and orange juice. The energy for the water's evaporation comes from steam channels next to the feed channels, so that the operation differs sharply from other forms of "membrane distillation". The membrane evaporator retains flavors effectively. Because it has an overall vapor phase mass transfer coefficient of about 1 cm/s, it is only 68% efficient: only about 0.68 kg water is evaporated per kg steam condensed. This efficiency should be over 95% for a membrane which is 10 times more permeable. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：149 / 159

页数：11

共 18 条

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