公开(公告)号：US20180280888A1

公开(公告)日：2018-10-04

申请号：US15936643

申请日：2018-03-27

Applicant: HITACHI, LTD.

Inventor： Koji FUKUZAKI ,  Makoto ONISHI ,  Shinichi YOSHIKAWA ,  Shuji YAMADA ,  Kotaro KITAMURA ,  Yasutaka KONDO

IPC: B01D65/02 ,  B01D61/02 ,  B01D61/08 ,  B01D61/12 ,  B01D63/06 ,  C02F1/44 ,  B01D65/06

Abstract: A reverse osmosis treatment apparatus includes a membrane unit including an osmosis membrane module. The membrane unit includes a plurality of banks connected in series, each bank including an osmosis membrane module. At least one of the banks includes a treatment water pipe valve and a concentrated water pipe valve, and a bypass pipe capable of diverting the water to be treated, which is to be supplied to the bank, around the bank and draining the water to be treated and a chemical cleaning pipe capable of supplying the reverse osmosis membrane module disposed in the bank with chemical cleaning water are connected. A reverse osmosis treatment method is for cleaning intermittently a bank having the treatment water pipe valve and the concentrated water pipe valve while continuing the reverse osmosis treatment using the remaining bank.