Three-dimensional spherical-shell-shaped seawater photo-thermal evaporator and preparation method thereof

Abstract

The invention provides a three-dimensional spherical-shell-shaped seawater photo-thermal evaporator. The three-dimensional spherical-shell-shaped seawater photo-thermal evaporator comprises a floating layer, a high-reflection film layer, a water conveying channel and a three-dimensional spherical-shell-shaped photo-thermal evaporation structure. The floating layer is a porous foam layer, the upper surface of the floating layer is coated with a high-reflection film, a through hole is formed in the center of the floating layer, a water-absorbing cotton swab is embedded to serve as a water conveying channel, the lower end of the water-absorbing cotton swab extends into seawater to make contact with the seawater, and water is supplied to the photo-thermal evaporation structure from the lower water. The three-dimensional spherical-shell-shaped photo-thermal evaporation structure is connected with the upper end of the water-absorbing cotton swab, is supported by a spherical-shell-shaped supporting framework of the water-absorbing cotton core and is coated with a layer of cotton gauze-shaped structure, a hydrophilic paper base layer is prepared on the cotton gauze-shaped structure, and a gold or silver nanoparticle light absorption material layer is uniformly evaporated and deposited on a paper base. Therefore, the photo-thermal evaporation area is greatly increased, rapid and sufficient supply of photo-thermal evaporation water is guaranteed, and efficient solar photo-thermal evaporation and seawater desalination are achieved. The three-dimensional spherical-shell-shaped seawater photo-thermal evaporator is simple to prepare, low in cost and easy to popularize. The invention further provides a preparation method of the seawater photo-thermal evaporator.

Description

technical field [0001] The invention relates to the field of solar seawater desalination, in particular to a three-dimensional spherical shell seawater photothermal evaporator and a preparation method thereof. Background technique [0002] Seawater desalination is an important strategic choice to solve the contradiction between the supply and demand of water resources in my country's coastal and coastal areas, optimize the structure of water resources and ensure the safety of water supply. The thermal technology of solar seawater desalination mainly uses the light and heat resources of solar energy to heat seawater to undergo a phase change and evaporate, and then collect fresh water through condensation. Seawater desalination technology based on solar photothermal evaporation has been widely used in the field of seawater desalination due to its advantages of being green and non-polluting and highly sustainable in energy utilization. It has become an emerging way to purify w...

AI Technical Summary

Problems solved by technology

However, in the above process, due to the thin film structure floating on the interface, the heat loss to the lower water body is large, resulting in serious heat loss; in addition, the effective evaporation area of ​​this two-dimensional planar structure is small, and the planar structure is harmful to the water body. The incident angle of sunlight is required to be high, which is easy to cause light reflection and scattering loss, so the light absorption efficiency and light-to-heat conversion efficiency are still very low

Images