Title:
CONTROL METHOD FOR REVERSE OSMOSIS SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/166276
Kind Code:
A1
Abstract:
Provided is a control method for a reverse osmosis system which is capable of raising a water recovery ratio by a simple facility configuration and suppressing a scale trouble in a first RO device or the like. In the control method for a reverse osmosis system, which controls a condensed water discharge amount from a condensed water discharging line 21 in a reverse osmosis system that includes: a circulation line 10 that returns some concentrated water of an RO device 9 to be added to raw water; and the condensed water discharging line 21 which is branched from the circulation line 10, the conductivity or resistivity of the condensed water is calculated on the basis of a measurement value of the conductivity or resistivity of the raw water or RO supply water, and a condensed water amount or a permeating water amount of the RO device, and the condensed water discharge amount is controlled by a valve 22 so that the calculated conductivity or resistivity of the condensed water is in a prescribed range.
Inventors:
OTANI SHOJI (JP)
Application Number:
PCT/JP2020/001489
Publication Date:
August 20, 2020
Filing Date:
January 17, 2020
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D61/12; B01D61/42; B01D61/58; C02F1/44; C02F1/469; C02F5/00
Foreign References:
| JP2012206073A | 2012-10-25 | |||
| JP2010000455A | 2010-01-07 | |||
| JP2011147899A | 2011-08-04 | |||
| JP2018167146A | 2018-11-01 | |||
| JP2019018186A | 2019-02-07 | |||
| JP2004167423A | 2004-06-17 | |||
| JP2018171577A | 2018-11-08 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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