新型卷式膜组件的静态混合隔网研制及其强化传质研究  

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

作　　者：刘久清 曾凡立 白立顺 洪梓坤 宋飞飞 LIU Jiuqing;ZENG Fanli;BAI Lishun;HONG Zikun;SONG Feifei(School of Metallurgy and Environment,Central South University,Changsha 410083,China)

机构地区：[1]中南大学冶金与环境学院,长沙410083

出　　处：《膜科学与技术》2021年第6期133-137,145,共6页Membrane Science and Technology

基　　金：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)。

摘　　要：通过借鉴静态混合器的原理,结合传统隔网的特性,提出了一种应用于卷式膜组件的新型静态混合隔网;利用计算流体力学(CFD)对静态混合型隔网膜组件分离葡聚糖溶液过程的流场结构进行了初步的模拟分析.同时,对静态混合型隔网膜组件分离葡聚糖溶液过程中的压降进行CFD模拟和实验测量,验证了模拟的有效性;此外,还对静态混合隔网膜组件的膜分离性能进行了研究分析.结果表明,新型静态混合隔网使膜表面附近和流道中心的流体相互迁移混合,增加了传质性能,降低了浓差极化,提高了能量利用率.在同等传质系数情况下,其比传统隔网膜组件膜分离过程中测量的能耗降低50%以上.Based on the principle of static mixer and the characteristics of traditional separator,a new static mixing spacer applied to 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.

关 键 词：卷式膜组件 隔网 静态混合 传质强化 CFD模拟 

分 类 号：TQ028.8[化学工程]