在利用流动电极电吸附（FCDI）进行脱盐处理的同时以电渗析（ED）作为流动电极的再生单元，2个过程耦合可实现盐水的连续稳定脱盐。研究结果表明，FCDI的脱盐率随电压的增加而增大，随着盐水总流量的增加而减小；在优化条件下，FCDI的脱盐率达95%，水效为95%。当FCDI采用连续工作模式而ED采用间歇式工作时，可充分发挥前者脱盐能耗低、水效高以及后者对于流动电极脱盐速率大及体积小的优势。FCDI+ED耦合技术解决了FCDI技术中流动电极的再生效率低、再生不稳定及设备体积大的问题。

Continuous stable desalting process for saline water can be realized by using flow capacitive deionization (FCDI) to perform desalination while using electrodialysis (ED) as the regeneration unit for flow electrode.Studies show that the desalination rate by FCDI increases with the increase of voltage,but decreases with the increase of the total flow of saline water.Under optimized conditions by FCDI,the desalination rate can reach 95% and the recovery rate of water can reach 95%.When FCDI works in a continuous mode while ED works in an intermittent mode,the coupling process can give full play to FCDI's advantages in low energy consumption of desalination and high recovery rate of water,and also give full play to ED's advantages in high desalting speed and small equipment size.The FCDI+ED coupling technology can solve the problems such as low efficiency of regeneration,instable regeneration and bulky equipment for the regeneration flow electrode in FCDI.

莫恒亮(1988-),男,博士研究生,研究方向为电化学水处理,mohengliang@sina.com