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Deep low-temperature seawater cooling decompression sea water desalination method and device thereof

A technology of seawater and low temperature, applied in the field of devices used in this method, can solve the problems of high cost of fresh water and high cost of desalination

Inactive Publication Date: 2008-08-27
胡世曦
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Problems solved by technology

At present, the most widely used distillation method needs to use electric energy or fuel for distillation, so the cost of obtaining fresh water through distillation is high
The low-temperature distillation seawater desalination equipment designed by Tianjin Institute of Seawater Desalination and Comprehensive Utilization uses low-grade waste heat or electric energy from power plants and chemical plants to produce distilled water. The application of this technology has great limitations, which means that most cities need Desalination of seawater with electric energy also has the problem of high desalination cost

Method used

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  • Deep low-temperature seawater cooling decompression sea water desalination method and device thereof

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Embodiment Construction

[0016] This unit includes:

[0017] A common solar water heater includes an input pipe for a heat transfer medium and an output pipe for a heat transfer medium.

[0018] A device for pumping cryogenic seawater from the deep sea, consisting of a water pump and an insulated pipeline. The low-temperature seawater is obtained from a depth of 100 meters below the sea surface.

[0019] A closed cylindrical container, the inside of which is divided into upper and lower parts according to the ratio of 10:1. The lower part is the evaporation chamber 1, the interior of the evaporation chamber is covered with heat insulating material, and the upper part is the condensation chamber 2. The two parts are connected through the valve 3, and the steam can enter the condensation chamber from the evaporation chamber through the valve 3. There is a heating pipeline 6 inside the evaporation chamber, and a surface seawater inlet 10 is arranged at the upper end of the evaporation chamber, and a h...

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Abstract

The invention relates to a seawater desalination method, which uses the temperature difference between surface seawater and deep seawater to cause seawater evaporation and aqueous vapor condensation. The basic principle includes heating the surface seawater by using solar energy, then boiling the seawater at a low temperature by reducing atmospheric pressure, and then filling the aqueous vapor in a closed container, and finally condensing the aqueous vapor into fresh water after low-temperature deep seawater cooling. At the same time when the aqueous vapor condenses in large amount, atmospheric pressure in the closed container is reduced, and low atmospheric pressure is consequently favorable for re-boiling the seawater. The process can recycle, and fresh water is continually produced accordingly. The method has the advantages that seawater can boil at low temperature in low atmospheric pressure condition, thereby consuming a small amount of energy resource, which has low cost, is suitable for commercial scale process, and has great commercial value.

Description

field of invention [0001] The invention relates to a distillation seawater desalination technology, and simultaneously provides a device used in the method. Background technique [0002] The shortage of fresh water resources is one of the serious problems facing the world, and seawater desalination is the fundamental way to solve this problem. Distillation, which is widely used at present, needs to use electric energy or fuel for distillation, so the cost of obtaining fresh water through distillation is high. The low-temperature distillation seawater desalination equipment designed by Tianjin Institute of Seawater Desalination and Comprehensive Utilization uses low-grade waste heat or electric energy from power plants and chemical plants to produce distilled water. The application of this technology has great limitations, which means that most cities need Desalination of seawater with electric energy also has the problem of high desalination cost. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F103/08
CPCY02A20/124
Inventor 胡世曦
Owner 胡世曦
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