Energy saving spraying distillation type seawater desalination method under negative pressure and equipment

Abstract

The invented operation mode is to form negative pressure environment, atomizating at first, then evaporating. Evaporation tank is core of the system which consists of evaporation tank, condensation tank, liquid level tank, solar heater, water collecting tank, compression pump, vacuum pump, raw water tank, dense saline water tank, fresh water tank, heating unit, spray nozzle, air-water separator, heat transfer unit and autocontrolling system, changement of elevation level from 9M to 7M of the liquid level tank is utilized to form negative pressure area inside the evaporation tank, condensation tank and water collecting tank to reduce boiling point of seawater, heating unit is utilized to supply heat energy to make atomizated water temp. reaching boiling point, spray nozzle is used to atomizate seawater to be easy gasificated and evaporated, heat transfer unit is used to realize rapid condensation of vapour.

Description

technical field [0001] The invention relates to an energy-saving spray negative pressure distillation type seawater desalination method and equipment, which can be widely used in seawater desalination and fields requiring high water purity. technical background [0002] Water is the source of all living things and the lifeline of human beings. Although the earth is known as a water polo, 71% of the earth's surface is covered by water, but 97.5% of the water is seawater, 2% is covered by glaciers and ice caps, and the rest is stored deep underground. It is difficult for people to access, and the fresh water that can be used by humans is only about 0.26%. In the past 30 years, due to the rapid development of industry and agriculture, the living environment has been severely damaged, water resources have been polluted and wasted, and the population has increased, making water resources increasingly scarce. At present, more than 100 countries in the world are short of water, a...

AI Technical Summary

Problems solved by technology

At present, there are two ways to desalinate seawater, one is distillation, but the cost is too high; the other is to use reverse osmosis membrane technology, due to the problem of membrane pollution, the cost of per ton of water treatment has not been reduced.

For this reason, the two methods have not been promoted. Finding new ways to reduce the cost per ton of water desalination is the key to solving this problem.

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