净水技术2025，Vol.44Issue(6)：138-147,10.DOI:10.15890/j.cnki.jsjs.2025.06.017
反渗透膜流道设计的性能优化与结垢机理分析
Performance Optimization and Fouling Mechanism Analysis of RO Membrane Flow Channel Design
摘要
Abstract
[Objective]In traditional reverse osmosis(RO)membrane systems,scaling has always been a major challenge limiting their performance and economic efficiency.The aim of this study is to optimize the flow channel design of RO membranes and analyze fouling mechanisms,in order to improve the performance of membrane module and reduce fouling.[Methods]By establishing a three-dimensional computational model of RO membrane flow channels,the differences in hydraulic performance between single-layer channels and the new step-side flow channels are compared,and the influence of the inlet method of step-side membranes on membrane permeability was analyzed.Simultaneously,long-term filtration tests and fouling weighing are conducted to validate the accuracy of the simulation model.[Results]The step-side flow scheme exhibits better flow uniformity and effectively reduced concentration polarization effects.The stair-step flow channel of the membrane reduced in height and increases in velocity in the post-segment,leading to enhanced the flushing effect and reducing fouling in this region.Compared to conventional side flow membranes,the step-side flow scheme in the experimental setup reduced fouling mass per unit area by 25％,greatly improving the membrane's lifespan.Compared to the single-layer flow channel,the step-side flow channel achieved an 18％increase in total water production and a 2％increase in desalination rate under the conditions of a total inlet flow rate of 3.2 L/min and a membrane feed pressure of 0.62 MPa.[Conclusion]The single-side inlet scheme in the stepped channel yields a higher recovery rate,significantly improved uniformity and average flow velocity,reducing the rate of membrane contamination.With a lower scaling per unit area and relatively lower inlet and outlet pressure differences,the stepped single-side membrane channel offers optimal performance in terms of water production rate and cost-effectiveness.关键词
反渗透膜/流道设计/性能优化/结垢机理/回收率Key words
RO membrane/flow channel design/performance optimization/fouling mechanism/recovery rate分类
资源环境引用本文复制引用
田伶,李斌,林春儿,闫嘉超,刘红星,褚雯霄..反渗透膜流道设计的性能优化与结垢机理分析[J].净水技术,2025,44(6):138-147,10.基金项目
国家自然科学基金(52206113) （52206113）
