海水淡化反渗透浓差极化数值研究  

Numerical Study on Concentration Polarization of Reverse Osmosis in Seawater Desalination

作　　者：李清玉 范宝鑫 陈颂英[1] 朱祖超[2] 林培峰[2] LI Qingyu;FAN Baoxin;CHEN Songying;ZHU Zuchao;LIN Peifeng(Key Laboratory of High Efficient and Clean Machinery Manufacturing,Ministry of Education,Shandong University,Jinan 250061,China;School of Mechanical and Automatic Control,Zhejiang University of Technology,Hangzhou 310018,China)

机构地区：[1]山东大学高效清洁机械制造教育部重点实验室,济南250061 [2]浙江理工大学机械与自动控制学院,杭州310018

出　　处：《工程热物理学报》2024年第6期1730-1734,共5页Journal of Engineering Thermophysics

基　　金：反渗透海水淡化装置系统节能关键技术基础研究NSFC–山东联合基金(No.U2006221)。

摘　　要：为研究海水淡化反渗透中的浓差极化问题,本文构建了新的反渗透LBM模型,能更方便地解决扩散系数较小时的计算不稳定,并与已有文献数据进行对比,验证了模型的准确性。基于该模型,本文进一步模拟分析了不同雷诺数及不同跨膜压差下的反渗透浓差极化现象。结果表明:增加雷诺数可以减小浓差极化现象,增加膜的渗透通量;而增加跨膜压差不仅增加浓差极化,也增加了渗透通量,同时也极大的增加了能耗,最终导致海水淡化的成本激增。因此,在实际应用中,需要综合考虑雷诺数及跨膜压差的大小,设置合理参数以实现海水淡化设备低成本高效率运行。In order to study the problem of concentration polarization in seawater diluting reverse osmosis,this article has built a new reverse osmosis LBM model,which can more conveniently solve the unstable calculation of the diffusion coefficient,and compare it with the published documents accuracy.Based on this model,the phenomenon of reverse osmosis polarization of different Renault and different cross-membrane pressure differences is simulated.The results show that increasing the number of Renault can reduce the phenomenon of polarization and increase the amount of permeability of the membrane;while increasing the cross-membrane pressure difference and increased the polarization,it also increases the infiltration flux.Therefore,in practical applications,the size of the number of Re and cross-membrane pressure diferences are needed.

关 键 词：反渗透 LBM 数值模拟 浓差极化 

分 类 号：TK123[动力工程及工程热物理—工程热物理]