| 摘要 |
PURPOSE:To obtain an electrodialysis tank in which regeneration of iron exchange resin is made unnecessary by packing ion-exchange resin between a bipolar membrane and an ion-exchange membrane. CONSTITUTION:Three units are arranged between a cathode and an anode in an electrodialysis tank. In one unit, membranes are arranged in order of a bipolar membrane 6, a cation exchange membrane 7, an anion exchange membrane 8 and the bipolar membrane 6. Cation exchange resin is packed in a cation desalting chamber 2 comparted by both the bipolar membrane 6 and the cation exchange membrane 7. Further anion exchange resin is packed in an anion desalting chamber 3 comparted by both the anion exchange membrane 8 and the bipolar membrane 6. A concentration chamber 4 is formed between the cation exchange membrane 7 and the anion exchange membrane. |
