摘要
流动电极电容去离子(FCDI)作为一种新兴的除盐技术,具有理论无限吸附和适用于高浓度盐水除盐的优势。但是,在FDCI系统运行过程中,流动电极在蛇形流道内很容易出现颗粒聚集和沉降,使脱盐率降低甚至出现堵塞流道问题。设计菱形流道并应用于FCDI系统,利用流态模拟分析菱形流道内流态,以选择适宜的流道结构来避免低速区和颗粒聚集区的形成。模拟结果表明,菱形L2流道内导流体的引入大幅度地降低了流道内的低速区并改善了颗粒沉积情况。此外,脱盐实验结果表明,在高含盐量(16 g·L^(-1))下,菱形L2流道FCDI系统依然能获得较高的脱盐性能。
As an emerging desalination technology,flow-electrode capacitive deionization(FCDI)has the advantages of theoretically infinite adsorption capacity and applicability to high-concentration brine.However,during the operation of FCDI,the flow electrode in the S-shape channel is prone to particle sedimentation.This undesirable phenomenon brings about the problems of low efficiency and clogging of the channel.The flow simulation of the lozenge channel was performed to select the channel structure to avoid the formation of a low-velocity region and particle sedimentation region.The simulation results showed that the introduction of the fluid conductor in the lozenge L2 channel significantly reduced the low-velocity region in the flow channel and improved particle sedimentation.In addition,the results of desalination experiments discovered that the lozenge L2 channel FCDI system still achieved high desalination performance at high salinity(16 g·L^(-1)).
作者
刘明羲
席靖钧
吕家玉
高维春
梁吉艳
关银燕
LIU Mingxi;XI Jingjun;LYU Jiayu;GAO Weichun;LIANG Jiyan;GUAN Yinyan(School of Environmental and Chemical Engineering,Shenyang University of Technology,Shenyang Liaoning 110870,China;SUT-LONGKING Institute of Environmental Industrial Technology,Shenyang Liaoning 110015,China;Liaoning Province Research Center for Wastewater Treatment and Reuse,Shenyang Liaoning 110870,China;Liaoning Hongyanhe Nuclear Power Co.,Ltd.,Dalian Liaoning 116001,China)
出处
《当代化工》
CAS
2024年第10期2347-2351,2358,共6页
Contemporary Chemical Industry
基金
辽宁省教育厅科学研究经费项目(项目编号:LJKMZ20220499)
辽宁省教育厅科学研究经费项目(项目编号:LJKZ0154)
辽宁省应用基础研究计划项目(项目编号:2022JH2/101300121)
辽宁省2021年第一批“揭榜挂帅”科技攻关项目(项目编号:2021JH1/10400031)。
关键词
流动电极电容去离子
流动电极
菱形流道
流态模拟
苦咸水淡化
Flow-electrode capacitive deionization
Flow electrode
Lozenge channel
Flow simulation
Brackish water desalination
