A circular countercurrent heat exchange solar seawater desalination device

Abstract

The invention relates to the technical field of seawater desalination, particularly to a dual-rectangular shaped countercurrent flow heat-exchange type seawater desalination device adopting solar energy as the energy source. The dual-rectangular shaped countercurrent flow heat-exchange type solar-powered seawater desalination device comprises a seawater inlet pipeline, a salt collecting tank, a dual-rectangular shaped tank, a dual-rectangular shaped condensation pipe, a solar heat collection box and an air pump. According to the invention, the cheap solar energy is adopted for seawater desalination, and the dual-rectangular shaped countercurrent flow heat-exchange technology and the seawater inlet vertical tank heat exchanging technology are utilized, so that the heat discharged from the dual-rectangular shaped countercurrent flow heat-exchange type seawater desalination device to the environment is greatly reduced, and the distillation efficiency of solar energy is improved; in addition, the distillation manner is adopted, complicated pretreatment equipment is not required, the structure is simple, the operation is simple and convenient, the seawater desalination cost is reduced, and the yield of fresh water is increased.

Description

technical field [0001] The invention relates to the technical field of desalination of seawater, in particular to a seawater desalination device of a circular countercurrent heat exchange type using solar energy as an energy source. Background technique [0002] With the growth of population and the development of industry, environmental pollution and destruction are becoming more and more serious, resulting in the scarcity of fresh water resources, thus increasing the market demand for seawater desalination. At present, the commonly used seawater desalination technologies mainly include: reverse osmosis technology and distillation technology. [0003] Reverse osmosis technology, such as the published patent: CN104692492A, its core component is the reverse osmosis membrane. The reverse osmosis membrane only allows water molecules to pass through, while sodium ions and chloride ions in seawater are difficult to pass through the reverse osmosis membrane. When a sufficient pr...

AI Technical Summary

Problems solved by technology

However, the main problem of this technology is that the energy consumption is too large. The process of converting liquid water into water vapor needs to absorb a lot of heat. Therefore, the energy consumption of distillation technology is much higher than that of reverse osmosis technology.

However, the energy level required for distillation technology is relatively low (mainly thermal energy), and solar energy or exhausted waste heat can usually be used for distillation. For example, the public patent: CN101302048B. This is a distillation technology that has a certain degree of competition despite its high energy consumption. One of the reasons for the advantage

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