环境工程学报2025，Vol.19Issue(5)：1111-1119,9.DOI:10.12030/j.cjee.202411057
摇椅式电容去离子技术分盐浓缩脱硫废水
Rocking-chair capacitor deionisation technology for salt separation and concentration of desulphurisation wastewater
摘要
Abstract
Aiming at the problems of complex composition and high treatment cost of desulphurisation wastewater from coal-fired power plants,this study focused on desalination and concentration of desulphurisation wastewater by using improved rocking-chair capacitor deionisation technology.The influence of parameters such as voltage,inlet water flow and ion concentration on the desalination efficiency and SO42-separation effect was investigated,as well as the energy consumption of the system.The results showed that the best treatment effect of the RCDI system was achieved at a voltage of 2 V,an inlet water flow rate of 46 mL·min-1 and an inlet water conductivity of 29 500 μS·cm-1.At 105 min,the desalination rate was 77.19％,the energy consumption per unit of desalination was 0.853 kWh·kg-1,the SO42-retention rate was always kept above 90％,and the change of the operating conditions had less influence on the SO42-separation effect.The improved RCDI system by increasing the polar water channel and adopting a monovalent selective anion exchange membrane,enabled SO42-to be effectively blocked in the raw water,whereas Ca2+,Mg2+,and Cl-migrated and were concentrated smoothly,achieving simultaneous salt separation.are concentrated,achieving continuous uninterrupted operation of simultaneous salt separation and concentration,greatly simplifying the operation process and improving the operation efficiency and stability of the system.关键词
摇椅式电容去离子/脱硫废水/分盐/浓缩/能耗Key words
rocking-chair capacitor deionisation/desulphurisation wastewater/salt separation/concentration/energy consumption分类
环境科学引用本文复制引用
贾勇,姜东生,文涛,韦飞,孟冠华..摇椅式电容去离子技术分盐浓缩脱硫废水[J].环境工程学报,2025,19(5):1111-1119,9.基金项目
生物膜法水质净化及利用技术教育部工程研究中心开放基金(BWPU2023KF05) （BWPU2023KF05）
