Plant for desalination or purification of sea or brackish...

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 1/14 (2006.01) B01D 3/00 (2006.01)

Patent

CA 2282507

The invention relates to a facility for desalinating or purifying sea water or brackish water by means of solar energy. Said facility comprises a closed cycle consisting of a thermal solar collector (2) and a heat exchanger (6, 6'), in which cycle a heat transfer medium circulates; a basin (11) which can be filled with the sea water or brackish water to be treated and in which the heat exchanger (6, 6') is arranged for heating and evaporating same water; a cooling surface (3) situated above the basin (11) for condensing the rising steam; and water collectors (13) arranged below parts of the cooling surface so as to catch the condensed water. The solar collector (2) is positioned at a distance to and above the cooling surface (3) in such a way that it keeps the cooling surface in the shade, said cooling surface (3) being made of a heat conducting material. In addition, ambient air is able to circulate in the space between the cooling surface (3) and the solar collector (2).

L'invention concerne une installation pour dessaler ou purifier de l'eau de mer ou de l'eau saumâtre au moyen d'énergie solaire. Cette installation comprend un circuit fermé qui est constitué d'un capteur thermique solaire (2) et d'un échangeur de chaleur (6, 6'), et dans lequel circule un caloporteur. Elle comprend également un bassin (11) qui peut être rempli d'eau de mer ou d'eau saumâtre à traiter et dans lequel est placé l'échangeur de chaleur (6, 6') pour chauffer et évaporer ladite eau. Elle comprend en outre une surface de refroidissement (3) située au-dessus du bassin (11) pour condenser la vapeur ascendante, ainsi que des collecteurs d'eau (13) placés sous des zones partielles de la surface de refroidissement pour capter l'eau condensée. Le capteur solaire (2) est placé à distance de la surface de refroidissement (3) et au-dessus de cette dernière de façon à maintenir celle-ci à l'ombre. La surface de refroidissement (3) est réalisée dans un matériau thermoconducteur, et l'air ambiant peut pénétrer dans l'espace compris entre la surface de refroidissement (3) et le capteur solaire (2) afin d'assurer une circulation latérale.

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