초록 ▼

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water to be distilled is introduced into the tank at an inlet spaced from the cover while brackish or waste water is withdrawn from the tank through an outlet at substantially the same level as the inlet.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

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water to be distilled is introduced into the tank at an inlet spaced from the cover while brackish or waste water is withdrawn from the tank through an outlet at substantially the same level as the inlet.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.

대표청구항 ▼

In the solar desalination of salt water, the method comprising the steps of: (a) introducing salt water into a tank having a bottom wall and a transparent top cover, said salt water in said tank forming a body of said water having a top surface, the space in the tank above the top surface being occu

In the solar desalination of salt water, the method comprising the steps of: (a) introducing salt water into a tank having a bottom wall and a transparent top cover, said salt water in said tank forming a body of said water having a top surface, the space in the tank above the top surface being occupied by a first mixture of air and water vapor; (b) withdrawing water from said body of water in the tank to maintain the top surface of the body of water substantially constant; (c) heating the body of water and the first mixture of air and water vapor in the space above the top surface of the body of water by solar rays passing through the transparent top cover of the tank; (d) withdrawing the first mixture of air and water vapor from said tank, the amount of water vapor in the mixture being such as to substantially saturate the air of the mixture; (e) condensing water vapor from the first mixture in a condenser; (f) withdrawing a second mixture of air with a residual amount of water vapor from the condenser and increasing the pressure thereof; and (g) forcing at a desired pressure said second mixture into a sparger located slightly above the bottom wall of the tank and in the body of water in the tank, said sparger having orifices through which the pressurized second mixture passes, and which second mixture is converted to small bubbles which pass upwardly through the water body to the top surface thereof and during such passage the air in the second mixture becomes heated and substantially saturated with water vapor transforming said second mixture to said first mixture.