厚室EDI过程制备超纯水的实验研究

Study on thick cell EDI process for ultra pure water production

采用自制的一级一段厚室EDI膜堆,以一级反渗透产水为原水进行了制备超纯水的实验研究.结果表明,操作电压、淡水流量、浓水流量、进水电导率等操作条件对于EDI的产水电阻率有不同程度的影响.在电压36V、淡水流量36L/h、浓水流量3.8L/h的条件下,产水电阻率可达到16～18MΩ·cm.

The ultra pure water production using a self-designed thick cell EDI stack is investigated by using one stage reverse osmosis permeates as feed solutions. The results show that the operating conditions including applied voltage, dilute flowrate, concentrate flowrate and feed conductivity significantly influence the resistivity of the EDI product. Under conditions of dilute flowrate of 36 L/h, concentrate flowrate of 3.8 L/h, and applied voltage of 36 V, a product stream with resistivity of 16-18 MΩ·cm is achieved.