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Numerical simulation of flux distribution in the hollow fiber ultrafiltration membrane module

Authors： ZHUANG Liwei, DAI Gance

Units： State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

KeyWords： hollow fiber membrane module; ultrafiltration; numerical simulation; porous media model; three dimensional flux distribution

ClassificationCode：TQ051.8 TQ021.1

year,volume(issue):pagination： 2016,36(1):86-95

Abstract：

In order to investigate the flux distribution in the hollow fiber membrane module, a three dimensional porous media model was built based on the skeleton of the porous support. The conservation equations of the shell and lumen space and the porous zone were solved by adopting the finite-volume based commercial code to describe the water ultrafiltration process. The flux distribution in the porous zone was obtained as well as the flow field in the shell and lumen space. Conclusions can be drawn from the simulation results: For arbitrary hollow fiber and fiber bundle, three dimensional non-uniformity of the flux distribution existed. The high local flux raised the energy consumption and decreased the efficiency of the module. An increase in the trans-membrane pressure caused a decrease in the uniformity of the flux distribution. Considering the effect of the inlet pattern makes the simulation results more applicable. Decreasing the permeability of the membrane improved the uniformity of the flux distribution. In the scope of this article, with constant trans-membrane pressure, the water flow-rate increased only by 10% when the permeability increased by 500%. The CFD model is suitable for research of single fiber and hollow fiber membrane module. The numerical results agreed well with the experimental data. Therefore, the model contributes to designing and optimizing the module structure.

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AuthorIntro：

作者简介: 庄黎伟（1988—），男，江苏丹阳市人，博士研究生，主要从事膜组件结构设计与优化的研究 *通讯作者，E-mail:gcdai@ecust.edu.cn

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