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Title:
FRESH WATER PRODUCTION DEVICE AND METHOD FOR OPERATING FRESH WATER PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/199725
Kind Code:
A1
Abstract:
Provided is a fresh water production device having a pretreatment means (1) that is constituted of a plurality of systems comprising pretreatment membrane modules (5) passing raw water therethrough for producing pretreated water, and a desalinization means 2 that is provided with a semipermeable membrane module (7) supplied with the pretreated water for producing fresh water, wherein: the pretreatment means (1) is provided with a raw water supply valve (V1), for which opening and closing speed is adjustable, on the raw water side of each system, and a filtering valve (V2), for which opening and closing speed is adjustable, on the pretreated water side of each system; and the fresh water production device is provided with a filtering start process control means such that (i) when filtering is started, the opening action of the raw water supply valve (V1) begins while the opening speed for the raw water supply valve (V1) is adjusted to suppress fluctuations in pretreated water pressure, and the opening action of the filtering valve (V2) begins after the raw water side pressure in the pretreatment membrane modules (5) has reached a prescribed pressure or greater or the raw water supply valve (V1) has reached a prescribed degree of opening or greater, or (ii) the opening action of the filtering valve (V2) begins, and the opening action of the raw water supply valve (V1) begins after the raw water side pressure in the pretreatment module (5) has reached a prescribed pressure or greater or the filtering valve (V2) has reached a prescribed degree of opening or greater.

Inventors:
TATEOKA DAISHI (JP)
TOMIOKA KAZUNORI (JP)
MAEDA TOMOHIRO (JP)
Application Number:
PCT/JP2016/066772
Publication Date:
December 15, 2016
Filing Date:
June 06, 2016
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C02F1/44; B01D61/58; E03B3/00
Domestic Patent References:
WO2013039224A12013-03-21
Foreign References:
JP2010125395A2010-06-10
JPH10163539A1998-06-19
JP2007181822A2007-07-19
JP2011056340A2011-03-24
JP2008006393A2008-01-17
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P. C. (JP)
Patent business corporation glory patent firm (JP)
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