MEMBRANE FILTRATION METHOD AND MEMBRANE FILTRATION DEVICE

Title:

MEMBRANE FILTRATION METHOD AND MEMBRANE FILTRATION DEVICE

Document Type and Number:

WIPO Patent Application WO/2013/002244

Kind Code:

A1

Abstract:

A membrane filtration method and membrane filtration device comprising: a pre-treatment membrane module that filters raw water with a filtration membrane and obtains pre-treated water; a reverse osmosis membrane module that filters the pre-treated water obtained from the pre-treatment membrane module with a reverse osmosis membrane and obtains permeate and retentate; a communicating tube channel that directly joins the pre-treated water outlet of the pre-treatment membrane module and the pre-treated water inlet of the reverse osmosis membrane module; and a branch tube channel that branches from the communicating tube channel and diverts a portion of the pre-treated water flowing in the communicating tube channel from the communicating tube channel. The filtration membrane of the pre-treatment membrane module is backwashed using the pre-treated water that has been diverted by the branch tube channel.

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Inventors:

MORIKAWA HIROFUMI
TOMIOKA KAZUNORI
MAEDA TOMOHIRO

Application Number:

PCT/JP2012/066340

Publication Date:

January 03, 2013

Filing Date:

June 27, 2012

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)
MORIKAWA HIROFUMI
TOMIOKA KAZUNORI
MAEDA TOMOHIRO

International Classes:

B01D65/02; B01D61/04; B01D61/08; B01D61/14; B01D61/58; C02F1/44

Foreign References:

JP2007130523A	2007-05-31
JP2007181822A	2007-07-19
JP2001347268A	2001-12-18
JP2011020029A	2011-02-03
JPH10263539A	1998-10-06
JP2007181822A	2007-07-19

Other References: