Experimental and CFD Studies on the Performance of Microfiltration Enhanced by a Turbulence Promoter

Chinese Journal of Chemical Engineering ›› 2012, Vol. 20 ›› Issue (4): 617-624.

Experimental and CFD Studies on the Performance of Microfiltration Enhanced by a Turbulence Promoter

刘元法¹, 贺高红¹, 丁路辉², 窦红¹, 鞠佳¹, 李保军¹

1. State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China;
2. Department of Biological Engineering, University of Technology of Compiegne, Compiegne 60205, France

收稿日期:2011-07-04 修回日期:2011-12-01 出版日期:2012-08-28 发布日期:2012-09-15
通讯作者: HE Gaohong, E-mail:hgaohong@dlut.edu.cn
基金资助:
Supported by the National Science Fund for Distinguished Young Scholars of China (21125628);the National High Technology Research and Development Program of China (2012AA03A611);the Fundamental Research Fund for the Central Universities (DUT11ZD112)

Experimental and CFD Studies on the Performance of Microfiltration Enhanced by a Turbulence Promoter

LIU Yuanfa¹, HE Gaohong¹, DING Luhui², DOU Hong¹, JU Jia¹, LI Baojun¹

1. State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China;
2. Department of Biological Engineering, University of Technology of Compiegne, Compiegne 60205, France

Received:2011-07-04 Revised:2011-12-01 Online:2012-08-28 Published:2012-09-15
Supported by:
Supported by the National Science Fund for Distinguished Young Scholars of China (21125628);the National High Technology Research and Development Program of China (2012AA03A611);the Fundamental Research Fund for the Central Universities (DUT11ZD112)

摘要/Abstract

摘要： This paper reports experimental and computational fluid dynamics(CFD) studies on the performance of microfiltration enhanced by a helical screw insert.The experimental results show that the use of turbulence pro-moter can improve the permeate flux of membrane in the crossflow microfiltration of calcium carbonate suspension,and flux improvement efficiency is strongly influenced by operation conditions.The energy consumption analysis indicates that the enhanced membrane system is more energy saving at higher feed concentrations.To explore the intrinsic mechanism of flux enhancement by a helical screw insert,three-dimensional CFD simulation of fluid flow was implemented.It reveals that hydrodynamic characteristics of fluid flow inside the channel are entirely changed by the turbulence promoter.The rotational flow pattern increases the scouring effect on the tube wall,reducing the particle deposition on the membrane surface.The absence of stagnant regions and high wall shear stress are respon-sible for the enhanced filtration performance.No secondary flow is generated in the channel,owing to the streamline shape of helical screw insert,so that the enhanced performance is achieved at relatively low energy consumption.

关键词: membrane fouling, flux enhancement, turbulence promoter, computational fluid dynamics

Abstract: This paper reports experimental and computational fluid dynamics(CFD) studies on the performance of microfiltration enhanced by a helical screw insert.The experimental results show that the use of turbulence pro-moter can improve the permeate flux of membrane in the crossflow microfiltration of calcium carbonate suspension,and flux improvement efficiency is strongly influenced by operation conditions.The energy consumption analysis indicates that the enhanced membrane system is more energy saving at higher feed concentrations.To explore the intrinsic mechanism of flux enhancement by a helical screw insert,three-dimensional CFD simulation of fluid flow was implemented.It reveals that hydrodynamic characteristics of fluid flow inside the channel are entirely changed by the turbulence promoter.The rotational flow pattern increases the scouring effect on the tube wall,reducing the particle deposition on the membrane surface.The absence of stagnant regions and high wall shear stress are respon-sible for the enhanced filtration performance.No secondary flow is generated in the channel,owing to the streamline shape of helical screw insert,so that the enhanced performance is achieved at relatively low energy consumption.

Key words: membrane fouling, flux enhancement, turbulence promoter, computational fluid dynamics

刘元法, 贺高红, 丁路辉, 窦红, 鞠佳, 李保军. Experimental and CFD Studies on the Performance of Microfiltration Enhanced by a Turbulence Promoter[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 617-624.

LIU Yuanfa, HE Gaohong, DING Luhui, DOU Hong, JU Jia, LI Baojun. Experimental and CFD Studies on the Performance of Microfiltration Enhanced by a Turbulence Promoter[J]. Chin.J.Chem.Eng., 2012, 20(4): 617-624.

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Experimental and CFD Studies on the Performance of Microfiltration Enhanced by a Turbulence Promoter

Experimental and CFD Studies on the Performance of Microfiltration Enhanced by a Turbulence Promoter

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