Title:
METHOD FOR REGENERATING WATER-SOFTENING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/181092
Kind Code:
A1
Abstract:
This method for regenerating a water-softening device 10 involves the use of a water-softening device 10 provided with a water-softening tank 12 that accommodates a weakly acidic cation exchange resin, an electrolysis tank 14 that generates acidic electrolyzed water, a regenerated water preparation unit 130 that supplies regenerated water used in a regeneration process, and a chelating agent sustained-release unit 78 that releases a chelating agent into the regenerated water preparation unit in a sustained manner, the regeneration process having a regenerating first step and a regenerating second step that is performed subsequently to the regenerating first step, the regenerating first step involving using, as the regenerated water, first regenerated water 301 composed of acidic electrolyzed water generated by the electrolysis tank 14, and the regenerating second step involving using, as the regenerated water, second regenerated water 302 including the chelating agent, which chelates hard components.
Inventors:
TAKANO TAKAYOSHI
MARUO YUKO
MARUO YUKO
Application Number:
PCT/JP2022/000768
Publication Date:
September 01, 2022
Filing Date:
January 12, 2022
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B01J39/07; B01J39/20; B01J49/53; C02F1/42
Domestic Patent References:
| WO2021201021A1 | 2021-10-07 |
Foreign References:
| JP2006043549A | 2006-02-16 | |||
| JPS57201535A | 1982-12-10 | |||
| JP2009165955A | 2009-07-30 | |||
| JPH11151489A | 1999-06-08 | |||
| JP2006217965A | 2006-08-24 | |||
| JP2005161145A | 2005-06-23 |
Attorney, Agent or Firm:
ITO Masakazu et al. (JP)
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