Title:
STERILIZATION METHOD OF PURE WATER PRODUCTION APPARATUS
Document Type and Number:
Japanese Patent JP2019107617
Kind Code:
A
Abstract:
To provide improved efficiency of sterilization treatment with hot water.SOLUTION: A method of sterilizing a pure water production apparatus 1 comprising: a membrane filtration device 3; and an electric deionized water production device 4 connected to the downstream side of the membrane filtration device 3 and supplied with permeated water from the membrane filtration device 3. The method has: a step in which, after the water to be treated from a pretreatment device stored in a water to be treated tank 2 is sequentially supplied to the membrane filtration device 3 and the electric deionized water production device 4, it is returned to the water to be treated tank 2, thus circulating the water to be treated along a circulation path including the membrane filtration device 3 and the electric deionized water producing device 4; and a step of heating the water to be treated circulating along the circulation path to a predetermined temperature, and then cooling it after held for predetermined time, thus sterilizing the membrane filtration device 3 and the electric deionized water production device 4. The step of sterilizing is performed within the range of the conditions that a cation exchanger CE and an anion exchanger AE packed in a deionization chamber D of the electric deionized water production device 4 are not broken.SELECTED DRAWING: Figure 1
Inventors:
SHIBAZAKI KENJI
HIDAKA MASANARI
HIDAKA MASANARI
Application Number:
JP2017242653A
Publication Date:
July 04, 2019
Filing Date:
December 19, 2017
Export Citation:
Assignee:
ORGANO KK
International Classes:
C02F1/44; A61L2/04; B01D61/08; B01D61/48; B01D61/58; B01D65/02; C02F1/02; C02F1/42; C02F1/469
Domestic Patent References:
| JP2014124483A | 2014-07-07 | |||
| JP2010099594A | 2010-05-06 | |||
| JP2004074109A | 2004-03-11 | |||
| JP2001047054A | 2001-02-20 | |||
| JP2005254201A | 2005-09-22 | |||
| JP2001353490A | 2001-12-25 |
Foreign References:
| WO2017056792A1 | 2017-04-06 |
Attorney, Agent or Firm:
Akio Miyazaki
Masaaki Ogata
Masaaki Ogata