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通过对反渗透 (RO)后接电去离子 (EDI)过程的实验研究 ,考察了不同操作条件对EDI过程产水水质的影响 ,探讨了EDI过程去离子的最佳操作参数 ,同时还考察了EDI产水过程的稳定性。实验表明 ,EDI过程可以长时间连续运行 ,并能获得高质量的纯水。同时还发现 ,提高EDI膜堆的操作电流可以得到高质量的纯水 ;进入EDI膜堆的原水电导率越低 ,EDI的产水水质就越好 ;适当提高EDI膜堆水回收率可以得到纯度较高的产水 ;适当提高EDI原水的温度对发挥EDI脱盐效果 ,获得高质量的纯水有利。
The effects of different operating conditions on the water quality of EDI process were investigated through the experimental study on the process of reverse osmosis (RO) followed by electrodeionization (EDI). The optimal operating parameters of EDI during EDI process were also discussed EDI water production process stability. Experiments show that the EDI process can be continuous operation for a long time and can obtain high quality pure water. At the same time, it is also found that the higher EDI film stack operating current can be obtained with high quality pure water; the lower the raw water conductivity into EDI membrane stack, the better water quality of EDI; the appropriate recovery of EDI membrane water can be obtained purity Higher water production; properly raise the temperature of EDI raw water to play EDI desalination effect, access to high-quality water is beneficial.