Title:
WATER SOFTENING DEVICE, RECYCLING METHOD FOR WATER SOFTENING DEVICE, AND METHOD FOR CLEANING WATER SOFTENING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/113741
Kind Code:
A1
Abstract:
This water softening device (1) comprises a water softening tank (3) and a neutralizing tank (4). The water softening tank (3) softens raw water containing hardness components by means of a weakly acidic cation exchange resin (7). In addition, the water softening tank (3) has a first water softening tank (3a) and a second water softening tank (3b). The neutralizing tank (4) neutralizes the pH of the softened water that has passed through the water softening tank (3) by means of the weakly basic anion exchange resin (8). In addition, the neutralizing tank (4) has a first neutralizing tank (4a) and a second neutralizing tank (4b). The water softening device (1) is configured such that the raw water containing hardness components is circulated through the first water softening tank (3a), the first neutralizing tank (4a), the second water softening tank (3b), and the second neutralizing tank (4b) in said order.
Inventors:
ISHIKAWA HIROKI
NAGATA AYAKA
KOIKE RISAKO
MATSUMOTO YUI
MURASE HIROKI
KATO MINATO
HAMADA YOHSUKE
MARUO YUKO
YANO HIROSHI
SAKAGUCHI YOSHIHIRO
NAGATA AYAKA
KOIKE RISAKO
MATSUMOTO YUI
MURASE HIROKI
KATO MINATO
HAMADA YOHSUKE
MARUO YUKO
YANO HIROSHI
SAKAGUCHI YOSHIHIRO
Application Number:
PCT/JP2021/041342
Publication Date:
June 02, 2022
Filing Date:
November 10, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B01D35/02; B01J39/07; B01J39/18; B01J41/07; B01J41/12; B01J47/02; B01J47/022; B01J47/14; B01J49/06; B01J49/07; B01J49/08; B01J49/53; B01J49/57; B01J49/75; B01J49/85; C02F1/42; C02F1/461
Domestic Patent References:
| WO2021024938A1 | 2021-02-11 |
Foreign References:
| JP2001170628A | 2001-06-26 | |||
| JPH06134457A | 1994-05-17 | |||
| JP2013121920A | 2013-06-20 | |||
| JPH05253568A | 1993-10-05 | |||
| JP2005161145A | 2005-06-23 | |||
| JP2001276631A | 2001-10-09 | |||
| JP2011030973A | 2011-02-17 | |||
| JP2009165954A | 2009-07-30 | |||
| JP2010142674A | 2010-07-01 |
Other References:
See also references of EP 4252884A4
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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