Patent ID: 9126853
Filing Date: 2015-09-08
Classification: B01D,B01F,C02F,G05D

Abstract:
1. A fresh water generator comprising: a first treatment system for producing fresh water by treating a first water having a low salt concentration undergoing treatment and including a first semipermeable membrane treatment apparatus to produce a concentrated water and fresh water; a second treatment system constructed for mixing the concentrated water from the first semipermeable membrane treatment apparatus with a separately supplied second water having a high salt concentration undergoing treatment to produce a mixed water and including a second semipermeable membrane treatment apparatus for producing fresh water; a first storage tank for storing the concentrated water from the first semipermeable membrane treatment apparatus and supplying the concentrated water to a point of mixing with the second water undergoing treatment; a second storage tank for storing the second water undergoing treatment and supplying the second water to the point of mixing of the concentrated water and the second water undergoing treatment; a first means for controlling the flow rate of the concentrated water supplied from the first storage tank; a second means for controlling the flow rate of the second water undergoing treatment supplied from the second storage tank, wherein the osmotic pressure of the first water undergoing treatment is equal to or lower than the osmotic pressure of the second water undergoing treatment; and a point of mixing of the fresh water obtained from the first water and the fresh water obtained from the mixed water to provide a produced, mixed fresh water wherein the osmotic pressure of the concentrated water is equal to or lower than the osmotic pressure of the second water undergoing treatment.