Three-dimensional solar evaporator with directional salt deposition function and used for treating high-concentration saline water and preparation method of three-dimensional solar evaporator

Abstract

The invention discloses a three-dimensional solar evaporator with a directional salt deposition function and used for treating high-concentration brine and a preparation method of the three-dimensional solar evaporator, and belongs to the field of seawater desalination. According to the solar evaporator, porous sponge is subjected to black super-hydrophilic and black super-hydrophobic modification. And then the three-dimensional Janus structures are vertically stacked at intervals to form a plurality of three-dimensional Janus structures, so that the problems of small evaporation area, insufficient gas overflow hole channels and low evaporation efficiency caused by large energy loss of a common three-dimensional solar evaporator are solved. In addition, the solar evaporator solves the problem that when a common evaporator treats high-concentration saline water, salt is deposited on the evaporation face of the common evaporator, so that the evaporation rate is greatly reduced, and even the evaporator loses efficacy. The solar evaporator has the advantages of being high in evaporation efficiency, capable of treating high-concentration saline water, economical, environmentally friendly and the like.

Description

technical field [0001] The invention belongs to the field of seawater desalination, and in particular relates to a three-dimensional solar evaporator with directional salt formation function for processing high-concentration salt water and a preparation method thereof. Background technique [0002] With the continuous improvement of human quality of life and the continuous growth of production, human demand for fresh water is also increasing. Around half a billion people in the world live in severe shortages of fresh water. And it is predicted that 50% of the country will face a freshwater crisis in the next three years. This will have a serious negative impact on the development of human civilization. Therefore, solving the problem of freshwater shortage has become an urgent problem for human beings around the world. At present, humans have developed many technologies to obtain fresh water resources, such as distillation, reverse osmosis, dialysis, freezing and other met...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a solar evaporator and its preparation method that can solve the problem of low efficiency in the treatment of high-concentration brine and the problem of salt pollution. The sponges were modified to be superhydrophilic and superhydrophobic respectively, and then the sponges with opposite wettability were stacked vertically to form multiple three-dimensional Janus structures, which were bound and fixed with hydrophilic black cotton ropes.

With this, our evaporator not only solves the problem of low efficiency in treating high-concentration brine, but also solves the problem of salt pollution

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