Method and plant for desalinating salt-containing water
OwnerHans Josef Van Elsinventor
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Abstract
Salt-containing water is desalinated by first passing salt-containing water through a heat exchanger disposed in a basin containing solar-heated brine formed by several layers of water lying one above the other in the basin, each of the layers of water forming the brine having a higher salt content than the layer present there above. The heat exchanger is in the lowermost layer of water having a higher temperature than the temperature of the layers of water lying above the lowermost layer of water. The salt-containing water is heated in the basin by solar energy indirect heat exchange with the solar-heated brine to obtain heated salt-containing water. At least part of the heated salt-containing water is evaporated to obtain water vapor, and the water vapor is condensed to obtain desalinated water.
Claims4
A method for desalinating salt-containing water, which comprises the steps of:
- (a) passing salt-containing water through a heat exchanger disposed in a basin containing solar-heated brine formed by several layers of water lying one above the other in the basin, each of said layers of water forming the brine having a higher salt content than the layer present there above, wherein the heat exchanger is disposed in the lowermost layer of water having a higher temperature than the temperature of the layers of water lying above the lowermost layer of water;
- (b) heating the salt-containing water in the basin using indirect heat exchange with the solar-heated brine to obtain heated salt-containing water;
- (c) evaporating at least part of the heated salt-containing water to obtain water vapor;
- (d) condensing the water vapor to obtain desalinated water;
- and
- (e) passing the desalinated water through a second heat exchanger disposed in a pit holding the salt-containing water to be desalinated, to pre-heat the salt-containing water in the pit by indirect heat exchange with the desalinated water, and supplying the pre-heated salt-containing water to the heat exchanger disposed in the basin according to step (a).
A method for desalinating salt-containing water, which comprises the steps of:
- (a) passing salt-containing water through a heat exchanger disposed in a basin containing solar-heated brine formed by several layers of water lying one above the other in the basin, each of said layers of water forming the brine having a higher salt content than the layer present there above, wherein the heat exchanger is disposed in the lowermost layer of water forming the brine having a higher temperature than the temperature of the layers of water forming the brine lying above the lowermost layer of water and wherein the brine in the basin contains a lower level of water having a salt content of ±24%, a middle layer of water having a salt content of ±15% and an upper layer of water having a salt content of ±0-4%;
- (b) heating the salt-containing water in the basin using indirect heat exchange with the solar-heated brine to obtain heated salt-containing water;
- (c) evaporating at least part of the heated salt-containing water to obtain water vapor;
- and
- (d) condensing the water vapor to obtain desalinated water.
Dependencies are inferred from the claim text.