Energy efficient process and apparatus for desalinizing water

Details Energy efficient process and apparatus for desalinizing water Energy efficient process and apparatus for desalinizing water

1978-04-26

1981-05-12

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Water purification only

Under pressure or vacuum

203 21, 203100, 203DIG4, 62 4, 202185B, 202205, 202235, C02F 116, B01D 100

Patent

active

042670225

ABSTRACT:
Method and apparatus for desalinizing water. Salt water in an evaporation zone is provided with heat of vaporization by a heat pump which transfers heat to the water from a thermal sink. The evaporation zone is maintained at subatmospheric pressure so that the salt water boils at a temperature at least about 10 degrees above the ambient dew point. The pressure in the evaporation zone is maintained at a low level by a vacuum pump and by condensing the vapor in a condensation zone from which fresh water is collected. The heat of condensation is dissipated into a "cold" sink if available or by a heat dissipating means such as an evaporative cooling apparatus. Energy efficiency results from the ability of the heat pump or pumps in the system to operate at a high coefficient of performance.

REFERENCES:
patent: 1466670 (1923-09-01), Monti
patent: 2677243 (1954-05-01), Telkes
patent: 2975107 (1961-03-01), Friedman
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patent: 3257291 (1966-06-01), Gerber
patent: 3312600 (1967-04-01), Morton
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patent: 3397119 (1968-08-01), Bourland
patent: 3699006 (1972-10-01), Hasslacher
patent: 4044819 (1977-08-01), Cottingham
patent: 4091623 (1978-05-01), Edmondson et al.

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