WATER TREATMENT METHOD, AND WATER TREATMENT SYSTEM

Title:

WATER TREATMENT METHOD, AND WATER TREATMENT SYSTEM

Document Type and Number:

WIPO Patent Application WO/2015/001887

Kind Code:

A1

Abstract:

Provided are a water treatment system and a water treatment method with which salt-containing water can be recovered with a high water recovery rate. In this water treatment system (200) and water treatment method, a scale inhibitor and a silica-scale inhibitor are supplied to water to be treated which includes Ca ions, SO4 ions, carbonate ions, and silica, and the water to be treated is subsequently separated by a second desalination unit (210) into treated water, and concentrated water in which the Ca ions, SO4 ions, carbonate ions, and silica have been concentrated. In a second crystallization unit (220), gypsum seed crystals are supplied to second concentrated water, and the gypsum crystallizes and is removed from the second concentrated water.

Inventors:

EDA MASAYUKI (JP)
OKINO SUSUMU (JP)
YOSHIYAMA RYUJI (JP)
SAKURAI HIDEAKI (JP)
UKAI NOBUYUKI (JP)
SUZUKI HIDEO (JP)
NAKASHOJI HIROSHI (JP)
YOSHIOKA SHIGERU (JP)

Application Number:

PCT/JP2014/064517

Publication Date:

January 08, 2015

Filing Date:

May 30, 2014

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)

International Classes:

C02F9/00; B01D9/02; B01D19/00; B01D61/08; B01D61/42; B01D61/58; C02F1/20; C02F1/42; C02F1/44; C02F1/469; C02F1/52; C02F5/00; C02F5/10; C02F5/14

Domestic Patent References:

WO2012008013A1

2012-01-19

Foreign References:

JPS62294484A	1987-12-21
JP2011200788A	2011-10-13
JPH10113660A	1998-05-06
JP2002011466A	2002-01-15
JP2010274202A	2010-12-09
JPH1085742A	1998-04-07
JPS5916588A	1984-01-27
JP2000511109A	2000-08-29
JP2011147899A	2011-08-04
JPH10128052A	1998-05-19
JP2001314873A	2001-11-13
US7815804B2	2010-10-19

Other References: