| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric regeneration type desalting apparatus avoiding excessive concentration of ions in electrode chambers, preventing the deterioration of an ion exchange membrane, by alkali attack suppressing the corrosion of electrodes and the generation amount of hydrogen and oxygen by electrolysis, removing dissolved oxygen in circulating concentrated water, suppressing the increase of dissolved oxygen of a desalting chamber and capable of achieving the recovery ratio of ultrapure water almost equal to that of a conventional electric regeneration type desalting apparatus. SOLUTION: In the electric regeneration type desalting apparatus wherein desalting chambers 5 and concentration chambers 6 are arranged between electrode chambers (anode chamber 2, cathode chamber 7) to be filled with an ion exchanger and cation exchange membranes or anion exchange membranes are alternately arranged between the respective chambers, the electrode chambers are formed as desalting constitution removing ions and concentrated water is introduced into the concentration chamber and the electrode chambers while the outlet water of the electrode chambers is converted to concentrated water through a vacuum degassing membrane device 19 to be introduced into the concentration chambers and the electrode chambers.
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