Search International and National Patent Collections

1. (WO2017204054) REVERSE OSMOSIS MEMBRANE APPARATUS AND METHOD FOR OPERATING REVERSE OSMOSIS MEMBRANE APPARATUS

Pub. No.:    WO/2017/204054    International Application No.:    PCT/JP2017/018531
Publication Date: Fri Dec 01 00:59:59 CET 2017 International Filing Date: Thu May 18 01:59:59 CEST 2017
IPC: C02F 1/44
B01D 61/12
B01D 65/02
Applicants: NOMURA MICRO SCIENCE CO., LTD.
野村マイクロ・サイエンス株式会社
Inventors: NAKAMURA Seiichi
中村 清一
Title: REVERSE OSMOSIS MEMBRANE APPARATUS AND METHOD FOR OPERATING REVERSE OSMOSIS MEMBRANE APPARATUS
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.