Solar distilling device and preparation method thereof

Abstract

The invention relates to a solar distilling device used for preparing distilled water, which comprises an upper surface structure, a lower surface structure, a raw water inlet, a distilled water outlet and a polluted water outlet, wherein the upper surface structure and the lower surface structure define a closed containing chamber; a hydrophilic coating is spread on the upper surface structure; a hydrophobic coating is spread on the lower surface structure; polluted water flows in through the raw water inlet; sunlight radiates through the upper surface structure; the water in the containing chamber is vaporized to the hydrophilic coating so as to form a water film and then flow out through the distilled water outlet; and a polluted water layer is absorbed by the hydrophobic coating of the lower surface structure to flow out along the polluted water outlet. For the problems of fogging and sweating on the upper surface, the upper surface structure is subjected to hydrophilic treatment, and a super-hydrophilic coating technology is adopted, so that the contact angle of the water film attached onto the surface is effectively reduced, thereby ensuring that the sunlight can go through smoothly and improving the evaporation efficiency; and the lower surface structure is subjected to hydrophobic treatment so as to increase the contact angle of the water and reduce the formation and accumulation of water scales, thereby ensuring that the solar distilling device can efficiently continue distilling operation.

Description

technical field [0001] The invention relates to a solar energy product, in particular to a solar energy distillation device and a preparation method thereof. Background technique [0002] At present, China and many developing countries are facing water scarcity, which seriously threatens China's sustainable development and people's health. The cost of economic growth in the past two decades is the severe pollution of water, air, and soil across the country, as well as the pesticide and insecticide residues in water and soil, and the residues of heavy metals are seriously exceeding the standard (only the farmland in one province of Hunan has exceeded the standard. accounted for one-third of the province's arable land), and the PM2.5 in the air exceeded the United Nations safety index by dozens or even hundreds of times. Cancer villages have emerged across the country, and there is a trend of younger cancer populations. The average life expectancy is estimated by the United ...

AI Technical Summary

Problems solved by technology

However, there are still several technical difficulties in the process of using solar energy to evaporate and condense. First, the upper surface used as condensation is often prone to dense water droplets. The water droplets have strong scattering and refraction of incident light, which seriously affects the penetration of light into the upper surface. , greatly reducing the intensity of sunlight reaching the absorbing layer

Secondly, if the raw water used (the raw water entering the filter device, one is polluted, such as containing heavy aurite or saline) contains more divalent aurite ions, scale accumulation is prone to occur

Over time, the formation of scale can severely reduce the heat absorption efficiency of the heat absorbing layer

Images