Method and device for seawater desalination through vacuum extraction

Abstract

The invention relates to a method for seawater desalination through vacuum extraction, which comprises the following steps: communicating seawater in the lower end of a closed system with natural seawater under the atmospheric pressure and gravity, maintaining the level in the low-temperature evaporation chamber of the closed system, forming a near-vacuum steam chamber above the low-temperature evaporation chamber, continuously extracting water vapor in the near-vacuum steam chamber with a pumping device, guiding the water vapor into fresh water, mixing the water vapor and the fresh water, continuously heating the low-temperature evaporation chamber with thermal energy released in liquefaction of the extracted water vapor and thermal energy continuously supplied by an anti-freezing device so that the seawater in the evaporation chamber can continuously evaporate into the steam chamber, automatically keeping the seawater level in the low-temperature evaporation chamber under the common effect of the atmospheric pressure and gravity, and maintaining the existence of the near-vacuum steam chamber. The seawater lost due to the continuous evaporation in the near-vacuum steam chamber is automatically supplemented by the natural seawater. Since the device for seawater desalination through vacuum extraction only comprises an extraction device and a heating drive box which are energy-consuming devices, the device for seawater desalination through vacuum extraction can be operated separately and can realize large-scale production.

Description

technical field [0001] The invention relates to a vacuum pumping seawater desalination method and device used in the field of seawater desalination. Background technique [0002] The existing seawater desalination methods in the world today mainly include reverse osmosis, multi-stage flash evaporation, and various low-temperature distillation methods, as well as some methods that use all natural energy. However, the current methods and equipment have their own differences in specific production practices. Big defect, still can't solve the fresh water shortage problem that threatens the mankind at low cost. Contents of the invention [0003] The invention discloses a vacuum pumping seawater desalination method and device. The method and device are low in cost, simple in structure, low in energy consumption, easy to popularize, can be operated by a single machine, and can be produced on a large scale, and can overcome the cost of the existing seawater desalination method Hi...

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Problems solved by technology

[0003] The invention discloses a vacuum pumping seawater desalination method and device. The method and device are low in cost, simple in structure, low in energy consumption, easy to popularize, can be operated by a single machine, and can be produced on a large scale, and can overcome the cost of the existing seawater desalination method High, complex structure, difficult to popularize and other defects, specifically:

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