CFD模拟优化多通道电催化膜反应器设计  

CFD simulation to optimize the design of multi-channel electrocatalytic membrane reactor

作　　者：韩静 王晴晴 葛晓龙 王虹[1] HAN Jing;WANG Qingqing;GE Xiaolong;WANG Hong(School of Material Science and Engineering,State Key Laboratory of Separation Membrane and Membrane Processes,National Center for International Joint Research on Separation Membranes,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学材料科学与工程学院,分离膜与膜过程国家重点实验室,分离膜科学与技术国际联合研究中心,天津300387

出　　处：《膜科学与技术》2025年第1期108-118,共11页Membrane Science and Technology

基　　金：国家重点研发计划项目(2020YFA0211002)。

摘　　要：以平板多通道炭膜为电极,直流稳压电源提供电流,蠕动泵提供分离动力,构建电催化膜反应器(ECMR).利用COMSOL Multiphysics 5.6对ECMR进行几何建模,模拟反应器内部流体力学分布,研究几何结构对流场分布的影响,并结合水力特性参数对其进行评价.结果表明,ECMR进水方式为平行于平板多通道炭膜、出水方式为单端出水时性能最佳,且经过示踪剂实验计算得到ECMR的死区容积率由18.86%降低到8.51%.对比优化前与优化后的ECMR的传质以及降解N,N-二甲基乙酰胺(DMAc)的效果,ECMR的传质系数由1.39×10^(-4)m/s增加到1.48×10^(-4)m/s,扩散系数由1.3074×10^(-3)cm^(2)/s增加到1.473×10^(-3)cm^(2)/s,同时对质量浓度100 mg/L DMAc的去除率提高了14.5%,COD去除率提升了9%.以上结果表明ECMR的几何结构优化能够提升水处理性能,增强传质,在废水处理领域具有巨大的应用潜力.In this paper,an electrocatalytic membrane reactor(ECMR)was constructed using a flat multi-channel carbon membrane as electrodes,a DC regulated power supply to provide current and a peristaltic pump to provide separation power.COMSOL Multiphysics 5.6 was used to geometrically model the ECMR,simulate the hydrodynamic distribution inside the reactor,study the effect of the geometric structure on the distribution of the flow field,and evaluate it in combination with the parameters of hydraulic properties.The results indicated that the best performance was achieved when the ECMR inlet was parallel to the flat multi-channel carbon membrane and the outlet was single-ended,and the dead zone volume of ECMR was reduced from 18.86%to 8.51%as calculated from the tracer experiments.Comparing the mass transfer and degradation of N,N-dimethylacetamide(DMAc)by ECMR before and after optimization,the diffusion coefficient of ECMR was increased from 1.3074 X10^(-3) cm^(2)/s to 1.473X 10^(-3) cm^(2)/s.Meanwhile,the removal of 100 mg/L DMAc was increased by 14.5%and COD removal by 9%.The above of results indicated that the geometry optimization of ECMR can enhance the water treatment performance and mass transfer,which has great potential for application in the field of wastewater treatment.

关 键 词：平板多通道炭膜 电催化膜反应器 流体力学 DMAc废水 

分 类 号：TQ028[化学工程] X703.1[环境科学与工程—环境工程]