Pyramid-shaped solar photo-thermal evaporator and preparation method thereof

Abstract

The invention discloses a pyramid-shaped solar photo-thermal evaporator. The pyramid-shaped solar photo-thermal evaporator comprises a heat insulation layer, a water conveying channel and a pyramid-shaped photo-thermal evaporation structure. The pyramid-shaped photo-thermal evaporation structure comprises four photo-thermal absorption surfaces, and each photo-thermal absorption surface comprises a plurality of divergent water collection micro-channels extending from the top of a pyramid to the bottom of the pyramid; a plasmon nano-particle surface layer, a middle hydrophilic layer and a bottom substrate are sequentially arranged from the surface layer to the bottom. The water conveying channel is composed of water absorption cotton cores, the water absorption cotton cores are located in parallel hole channels formed in the heat insulation layer, the lower ends of the water absorption cotton cores extend into the water body, and the upper ends of the water absorption cotton cores are connected with the photo-thermal absorption surface water collection micro-channels. According to the pyramid-shaped three-dimensional photo-thermal evaporation structure, the photo-thermal evaporation area is greatly increased, meanwhile, efficient photo-thermal conversion is achieved through the plasmon nanoparticles, in addition, rapid and sufficient supply of evaporated water is guaranteed through the water collection micro-channels and the hydrophilic layer, therefore efficient solar evaporation and seawater desalination are achieved. The invention further provides a preparation method of the evaporator.

Description

technical field [0001] The invention relates to the technical field of photothermal evaporation, in particular to a three-dimensional pyramid-shaped solar photothermal evaporator and a preparation method thereof. Background technique [0002] Seawater desalination is an ideal way to solve water shortages. Seawater desalination technology based on solar photothermal evaporation has been widely used in seawater desalination and other fields due to its advantages of being green and non-polluting, and high energy utilization continuity. It has become an emerging way to purify water and solve water shortages, especially in remote areas. Small-scale domestic water use such as islands, islands, etc. provides a feasible solution. [0003] The currently proposed solar photothermal conversion interface evaporation structure is mainly a two-dimensional planar photothermal structure with a very thin thickness. It is usually directly suspended or floated on the surface of seawater for p...

AI Technical Summary

Problems solved by technology

However, the current three-dimensional photothermal evaporation structure is usually designed separately from the absorber and the water supply channel. The water supply channel only transports water to a certain point of the photothermal absorber, and then relies on the hydrophilic properties of the surface of the light absorbing layer to gradually wet the entire absorption. layer, prone to problems such as low water collection capacity and insufficient water supply

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