Plant bionic high-concentration-salt-resistant solar evaporator device and preparation method and application thereof

Abstract

The invention discloses a plant bionic high-concentration-salt-resistant solar evaporator device and preparation and application thereof. According to the method, plant bionics with the plant stems as the photothermal conversion material are adopted for the first time, waste plant stems are recycled, waste is turned into wealth, and air pollution caused by plant stem incineration is effectively improved. According to the method, the top surface of the plant stem is carbonized by using an alcohol lamp, the carbon black layer is formed through simple oxidation, the bionic top carbonized plant cauloid is prepared, and the method is simple in technological process, convenient to operate, good in light absorption performance and high in photo-thermal conversion efficiency. The plant stalks are carbonized after being manually punched, then the cotton threads penetrate into the holes for drainage, one-way jet flow transmission can be achieved through the capillary acting force of the cotton threads by means of driving force generated by the height difference and the concentration difference of solutions, it can be guaranteed that the salt concentration on the surface of the evaporator cannot reach the saturation state while sufficient water supply is guaranteed, and the evaporation efficiency is improved. Therefore, the limitation that a traditional plant bionic solar evaporator is unstable and prone to salt deposition in the environment of high-concentration saline water and waste water for a long time is broken through.

Description

technical field [0001] The invention belongs to the technical field of desalination treatment of high-concentration salt water, and in particular relates to a plant bionic anti-high-concentration salt solar evaporation device and a preparation method and application thereof. Background technique [0002] However, the lack of resources has become an indisputable fact, especially with the modernization of industrial technology, the only fresh water resources have also been greatly damaged. At present, the fresh water that humans can directly use comes from groundwater, lake fresh water and river water. With the deteriorating environment, these fresh water resources are gradually scarce, especially in some arid areas and island areas. In arid areas, water shortages are caused by too little surface and shallow groundwater, while most of the water storage in islands and coastal areas is sea water, with insufficient fresh water resources. Therefore, desalination of seawater will ...

AI Technical Summary

Problems solved by technology

[0004] (1) Commonly used photothermal conversion materials are expensive, such as platinum-nickel alloys, gold nanoparticles, silver nanoparticles and other precious metal materials

[0005] (2) The preparation process is complicated, the steps are cumbersome, and special equipment is often required, and the preparation cost is high, such as carbon nanotubes, MXenes, graphene and other materials, which hinder large-scale production and application

[0006] (3) Most photothermal materials have poor salt tolerance during the evaporation process. Since the surface salt of the photothermal material reaches a supersaturated concentration during the evaporation process, the salt crystallizes and blocks the water transportation channel, which affects the water supply and even affects the photothermal material. Absorption and the escape of water vapor; resulting in the instability of photothermal materials, which will eventually greatly reduce its desalination performance and even cause the device to fail

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