Title:
PURE WATER PRODUCTION SYSTEM AND PURE WATER PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/074975
Kind Code:
A1
Abstract:
The present invention provides a pure water production system and pure water production method that can realize high-level purification for the quality of treated water and can suppress increases in production costs. A pure water production system 1 comprises: a reverse osmosis membrane device 4; an electric deionized-water production device 5 disposed in a stage subsequent to the reverse osmosis membrane device 4; and a control device 8 that controls the treatment conditions of the reverse osmosis membrane device 4. The control device 8 controls the treatment conditions of the reverse osmosis membrane device 4 such that the removal rate of a specified substance of the electric deionized-water production device 5 is less than or equal to a threshold, and such that the concentration of the specified substance in the treated water of the electric deionized-water production device 5 is less than or equal to a rated value and the specific resistance thereof is greater than or equal to a rated value.
Inventors:
NAKAMURA YUKI (JP)
SASAKI KEISUKE (JP)
SUDO FUMIO (JP)
SASAKI KEISUKE (JP)
SUDO FUMIO (JP)
Application Number:
PCT/JP2021/032334
Publication Date:
April 14, 2022
Filing Date:
September 02, 2021
Export Citation:
Assignee:
ORGANO CORP (JP)
International Classes:
B01D61/12; B01D61/48; B01D61/58; C02F1/44; C02F1/469
Domestic Patent References:
| WO2020184045A1 | 2020-09-17 | |||
| WO2017130454A1 | 2017-08-03 | |||
| WO1999048820A1 | 1999-09-30 |
Foreign References:
| JP2004000919A | 2004-01-08 | |||
| JP2018143922A | 2018-09-20 | |||
| JP2019188313A | 2019-10-31 | |||
| JP2006314971A | 2006-11-24 |
Attorney, Agent or Firm:
MIYAZAKI Teruo et al. (JP)
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