Method of recovering fresh water from saline water

Details Method of recovering fresh water from saline water Method of recovering fresh water from saline water

1973-08-31

1977-12-13

Bernstein, Hiram H.

Distillation: processes, separatory

Water purification only

203 50, 203 87, 159 1G, B01D 306, B01D 500

Patent

active

040627357

ABSTRACT:
A method of recovering fresh water from underground saline water. The method involves the pumping of water vapor from an underground location immediately above a supply of saline water to a condensor where the fresh water is recovered. The heat of condensation released by the vapor during recovery is returned to the underground saline water to raise its temperature and thereby increase its rate of vaporization. Other alternative processes to increase the rate of vaporization include utilization of an external source of waste thermal energy, injection of refrigerant into the underground saline water, and in those structures where petroleum residues may be simultaneously and profitably recovered with the fresh water, the injection of refrigerants soluble in petroleum into the underground saline water.

REFERENCES:
patent: 3140986 (1964-07-01), Hubbard
patent: 3274769 (1966-09-01), Reynolds
patent: 3470943 (1969-10-01), Van Huisen
Scientific American, vol. CXVII, No. 17, 10/27/1917.

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