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Title:
REVERSE OSMOSIS MEMBRANE APPARATUS AND METHOD FOR OPERATING REVERSE OSMOSIS MEMBRANE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/204054
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a reverse osmosis membrane apparatus and a method for operating a reverse osmosis membrane apparatus in which washing of the reverse osmosis membranes is efficiently performed and it is possible to obtain reverse osmosis membrane permeate at a stable water volume. Provided is a reverse osmosis membrane apparatus provided with: reverse osmosis membrane banks set in multiple stages in the flow channel for the water being treated; blockage degree-detecting means for independently detecting the respective degree of blockage of the reverse osmosis membrane bank of each stage; reverse osmosis membrane-washing means for conducting washing water from the concentrate side to the reverse osmosis membrane bank of each stage to wash the reverse osmosis membrane bank of each stage; water conduction/washing control valves for switching between water conduction and washing for the reverse osmosis membrane bank of each stage; a washing control means for operating the reverse osmosis membrane washing means at a specified timing to wash the reverse osmosis membrane bank of each stage; and a control device for controlling the reverse osmosis membrane washing means and the water conduction/washing control valves using the washing control means and performing water conduction/washing of the reverse osmosis membrane bank of each stage until the blockage degree of the reverse osmosis membrane bank of each stage as measured by the blockage degree-detecting means reaches a previously set replacement blockage degree.

Inventors:
NAKAMURA SEIICHI (JP)
Application Number:
PCT/JP2017/018531
Publication Date:
November 30, 2017
Filing Date:
May 17, 2017
Export Citation:
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Assignee:
NOMURA MICRO SCIENCE KK (JP)
International Classes:
C02F1/44; B01D61/12; B01D65/02
Domestic Patent References:
WO2009128328A12009-10-22
Foreign References:
JP2016067968A2016-05-09
JPH0520419Y21993-05-27
JP2002143849A2002-05-21
JP2003200160A2003-07-15
JP2007000788A2007-01-11
Attorney, Agent or Firm:
SAKURA PATENT OFFICE, p. c. (JP)
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