Multistage trapezoidal type distiller and method for solar photo-thermal evaporation seawater desalination

Abstract

The invention relates to a multistage trapezoidal distiller for solar photo-thermal evaporation seawater desalination. The multistage trapezoidal distiller comprises a thermal insulation material, a photo-thermal conversion material, a multistage evaporation condensation chamber, a glass cover plate and a transparent heat storage material; the thermal insulation material and the photo-thermal conversion material are laid above seawater at the bottom of a first-stage evaporation and condensation chamber; the trapezoidal evaporation and condensation chamber is vertically divided into multiple stages of evaporation and condensation chambers by inclined glass cover plates; a water inlet and a water outlet are respectively formed in the upper end and the lower end of the glass cover plate. Themultistage trapezoidal distiller has the beneficial effects that the trapezoidal distiller is divided into multiple stages of evaporation and condensation chambers by the inclined glass cover plate; the photo-thermal conversion material is heated by illumination to evaporate seawater; steam is subjected to heat exchange and condensation through the inclined glass cover plate to form fresh water tobe collected, condensation latent heat heats seawater of the previous stage to be evaporated again to obtain steam, heat exchange and condensation are carried out on the glass cover plate of the previous stage to form fresh water to be collected, solar photo-thermal multistage evaporation seawater desalination is achieved, and higher solar utilization efficiency is obtained.

Description

technical field [0001] The invention relates to the fields of seawater desalination and photothermal evaporation, and particularly includes a multi-stage ladder distiller and method for desalination of seawater by solar photothermal evaporation. Background technique [0002] 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. Photo-thermal solar seawater desalination technology has the advantages of high efficiency, low cost and simple maintenance, and is currently the mainstream solar seawater desalination technology. Thermal solar seawater desalination can be divided into solar-assisted multi-effect evaporation, multi-stage flash evaporation, heat pump desalination, membrane distillation, humidification and dehumidification, and solar stills according to different evaporation and condensation methods. It is...

AI Technical Summary

Problems solved by technology

Although the structure of the solar distiller is simple and easy to manufacture, due to the influence of condensed water on light absorption, the reflection of light on the water surface and glass surface, the heat loss of the large volume of water and the distiller, etc., the water production efficiency is low. Targeted optimization and improvement of the above-mentioned influencing factors

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