[12] Patent
[11] Patent No.:GC0009376  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141721
Date of the Decision to Grant the Patent:16/Dec/2018

[21] Application No.:GC 2015-28936

[22] Filing Date:16/2/2015

[30] Priority:

[33] State [32] Priority date [31] Priority No.
JP
19/2/2014
2014-029956

[72] Inventor: Toru KANNARI

[73] Owner: SASAKURA ENGINEERING CO., LTD., 7-5, Mitejima 6-chome, Nishiyodogawa-ku, , Osaka-shi, 555-0012, Japan

[74] Agent: Abu-Gazaleh Intellectual Property L.L.C

  

 

  

[51]IPC:
Int. Cl.: B01D 61/00, 61/02, 61/58; C02F 1/04, 1/16, 1/44 (2006.01)

[56] Cited Documents:

-JP 2008272668 A (SALINE WATER CONVERSION CROP.) 13 November 2008
-JP 1-04399 A (MITEUBISHI HEEAVY INDUSTRIES, LTD.) 21 April 1989
 
Examiner: Eng. Sattam M.AlMutairi

[54] FRESH WATER GENERATOR AND FRESH WATER GENERATING METHOD
[57] Abstract: [OBJECT] To improve the efficiency of generating fresh water without discharging concentrated saline water into an outside environment. [SOLUTION] An evaporator 2 evaporates and concentrates saline water used as a draw solution to generate concentrated saline water, and further generates condensed water. A forward osmosis membrane device 3 has a first chamber 3b and a second chamber 3c divided by a forward osmosis membrane 3a. The first chamber 3b is fed with the concentrated saline water from the evaporator 2, while the second chamber 3c is fed with diluting water lower in sodium chloride concentration. The concentrated saline water of the first chamber 3b is diluted with permeated water permeating through a forward osmosis membrane 3a and thereby increased in quantity. The concentrated saline water thus diluted and increased in quantity is separated by a reverse osmosis membrane device 4 into the concentrated saline water and permeated water. The concentrated saline water thus separated is circulated back to the evaporator 2 as the draw solution.
No. of claims: 9     No. of figures: 6


 

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