| 摘要 |
PROBLEM TO BE SOLVED: To provide a water softener with regeneration function which requires reduced quantity of water to be served for the regeneration of a cation exchanger and has improved regeneration efficiency and to provide its regeneration method. SOLUTION: When the cation exchanger 121 in an ion exchange vessel 12 is regenerated, the regenerated water containing a large amount of hydrogen ions is formed by electrolysis in a chamber, in which an anode 116 is arranged, of an electrolytic vessel 11, and further the regenerated water is circulated by a circulating means between the electrolytic vessel 11 and the ion exchange vessel 12. A calcium ion, etc., are removed at the cation exchanger 121 by the circulation of the regenerated water, and a hydrogen ion concentration of the regenerated water is recovered in the electrolytic vessel 11. The whole cation exchanger 121 is regenerated by continuing the circulation of the regenerated water in a specified time. |
