Distillation: processes – separatory – Water purification only
Patent
1978-05-03
1980-07-01
Bascomb, Jr., Wilbur L.
Distillation: processes, separatory
Water purification only
203 49, 203 86, 203DIG1, 203DIG17, 202234, C02B 106
Patent
active
042104947
ABSTRACT:
A solar desalination system comprising a tank having a transparent cover. Salt water to be distilled is introduced into the tank at an inlet spaced from the cover while brackish or waste water is withdrawn from the tank through an outlet at substantially the same level as the inlet. A closed circuit air loop includes a tubular sparger of porous material which extends along the tank bottom in slightly spaced relation thereto. Air under pressure is delivered to the sparger at one end by a conduit passing through the end wall of the tank and a pump. Moisture-free air is introduced into the pump by a tube extending from a condenser. Vapor-saturated air is exhausted from the tank at a level between the water surface and the cover and is conveyed to the condenser through a pipe. Distilled water is taken from the bottom of the condenser. In a modified embodiment, the compressor is bypassed by a duct extending from the tube to the conduit and includes an adjustable valve. In operation, air from the sparger passes upwardly through the water in the tank in the form of small bubbles which entrain moisture to the point of saturation. The water and vapor-saturated air is heated by solar rays passing through the transparent cover.
REFERENCES:
patent: 2305408 (1942-12-01), Clemens
patent: 2368665 (1945-02-01), Kohman et al.
patent: 3168450 (1965-02-01), Black
patent: 3284318 (1966-11-01), Coanda et al.
patent: 3565767 (1971-02-01), Light
patent: 3986936 (1976-10-01), Rush
patent: 4110172 (1978-08-01), Spears
Bascomb, Jr. Wilbur L.
Flickinger Don J.
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