| 摘要 |
Provided is a method for operating a regenerative ion exchange device in which raw water is used for cleaning after regeneration of an ion exchange resin, and excellent post-regeneration water quality is obtained. In the ion exchange device, a cation exchange resin 31 is contained in one of a first chamber 30 and a second chamber 20, and an anion exchange resin 21 is contained in the other of the first chamber 30 and the second chamber 20. The first chamber 30 and the second chamber 20 are made to communicate with each other by communication means 5, 8, 11. This method for operating an ion exchange device is provided with: a water collection step for sequentially passing raw water through the first chamber 30, the communication means, and the second chamber 20; a regeneration step for regenerating the cation exchange resin 31 and the anion exchange resin 21; a first cleaning step for passing raw water as an upward flow through the second chamber 20 and cleaning the resin in the second chamber 20 after the regeneration step; and a second cleaning step for passing raw water as an upward flow through the first chamber 30 and cleaning the resin in the first chamber 30 after the first cleaning step, feeding the cleaning waste water from the first chamber 30 though the communication means to the second chamber 20 and passing the cleaning waste water as an upward flow, and cleaning the resin in the second chamber 20. |
