Film-shell type multiple-effect film-reducing distillation sea-water desalinating device

Abstract

The invention discloses a film-case typed multiple-effect falling-film distilling desalination device of seawater, which is characterized by the following: adopting plastic film to replace traditional metal heat exchange material to make film beam heat-exchange component; welding two films; drawing silk ribbon; supporting keel to form film beam; placing multiple film beams at equal interval; welding film beam and end film to make heat exchange component of film beam; connecting end film and case; insulating seawater from fresh water; placing film beam component in certain container unit of case to constitute evaporator.

Description

technical field [0001] The invention belongs to the field of water treatment and seawater desalination, in particular to a membrane shell type multi-effect falling film distillation seawater desalination device. Specifically, it uses the characteristics of small pressure difference between effects of multi-effect distillation devices, replaces traditional metal heat exchange materials with plastic films, designs a membrane shell structure, adopts falling film distillation process, and uses welding and equidistant ribbons between the films. Tension or keel support, used for multi-effect distillation seawater desalination and high-purity water preparation. Background technique [0002] my country's annual per capita fresh water resources are about 2,400 cubic meters, which is 1 / 4 of the world's per capita fresh water resources. Among the more than 660 cities in the country, more than 400 cities are short of water, and 108 of them are seriously short of water. The shortage of...

AI Technical Summary

Problems solved by technology

The research and development of some domestic small-scale distillation and seawater desalination devices mainly follow the traditional model of shell and tube heat exchangers. The manufacturing process and standards of the devices used are relatively backward, making it difficult to effectively improve the thermodynamic performance of these devices, and the cost of water production is even higher. is difficult to compete with larger installations

[0007] In fact, due to stereotypes and habits, when it comes to high-efficiency distillation of seawater desalination, people naturally think of using metals with superior seawater corrosion resistance as heat exchange materials, but these metal materials resistant to seawater corrosion are generally expensive, resulting in the cost of seawater desalination devices On the other hand, because the device is only for producing the fresh water that people need daily, the cost is too high to make it difficult to popularize and apply

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