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Development of a new static mixing spacer for spiral-wound membrane module and its study on enhanced mass transfer

Authors： Liu Jiuqing，Zeng Fanli，Bai Lishun，Hong Zikun，Song Feifei

Units： Central South University，School of Metallurgy and Environment，Changsha，410083

KeyWords： spiral-wound membrane module; spacer; static mixing; mass transfer enhancement; CFD simulation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(6):133-137

Abstract：

Based on the principle of static mixer and the characteristics of traditional spacer, a new static mixing spacer for spiral-wound membrane module is proposed in this paper, computational fluid dynamics (CFD) was used to simulate the flow field on the separation of dextran solutions by spiral-wound membrane module with static mixing spacer. Meanwhile, CFD simulation and experimental measurement on the pressure drop during the same process were carried out to verify the effectiveness of the simulation; in addition, it was studied on the membrane separation performance on membrane module with static mixing spacer. It turns out that the new static mixer spacers migrate and mix the fluids with each other near the membrane surface and in the center of the channel, which increases the mass transfer performance, reduces the concentration polarization and improves the energy utilization. Under the condition of the same mass transfer coefficient, its energy consumption is reduced by more than 50% compared with that measured during the process of the membrane module separation with traditional spacer.

Funds：

国家重点研发计划(2018YFB0104200); 湖南省自然科学基金资助项目(2020JJ4717); 湖南省科技攻关项目(2020GK2056); 湖南省自然科学基金资助项目(2017JJ2317)

AuthorIntro：

刘久清(1974?)，男，湖南长沙人，教授，从事膜分离技术的研究.

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