Photo-thermal body device for solar steam generation and manufacturing and application thereof

Abstract

The invention discloses a photo-thermal body device for solar steam generation as well as manufacturing and application thereof. The method comprises the following steps: firstly, carrying out transparent super-hydrophobic coating treatment on a single side surface of a photo-thermal layer; combining one end of a hydrophilic wire rod to the photo-thermal layer, and overlapping the other end of the hydrophilic wire rod to a hydrophobic layer to obtain a double-sided different-effect fabric; fastening and connecting the double-sided different-effect fabric and a plastic-coated metal wire mesh at a lower inflection point of a broken line shape; the prepared photo-thermal body device comprises the plastic-coated metal wire mesh and the double-sided different-effect fabric attached to the plastic-coated metal wire mesh. The front projection of the plastic-coated wire mesh is in a broken line shape; wherein the cloth surface tension of the double-sided different-effect fabric is 50-80 cN; the hydrophilic wire rod is located at the upper inflection point of the broken line shape of the plastic-coated wire mesh, the wicking speed is larger than 150 mm / 10 min, and the wicking speed of the photo-thermal layer is larger than 80 mm / 10 min; the water contact angle of the hydrophobic layer is greater than 155 degrees; the photo-thermal body device is immersed into seawater, wherein the depth of the photo-thermal body device immersed into the seawater is 1 / 20-1 / 15 of the height of the plastic-coated wire mesh; under standard simulated sunlight (1kw / m<2>), the evaporation capacity of water vapor is 1.25-1.43 kg / (m<2>.H); no solid salt is separated out in the evaporation process.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and relates to a photothermal device for solar steam generation and its manufacture and application. Background technique [0002] The generation of water vapor by photothermal technology has become one of the important means to solve the shortage of fresh water resources. It is difficult to obtain large-scale and wide-ranging applications mainly due to many problems such as insufficient sunlight absorption rate and easy salt formation on the surface of photothermal bodies. In the research of avoiding salt accumulation of photothermal bodies, many technologies have been used, such as direct contact of photothermal bodies with seawater to ensure that no salt is precipitated, continuous excess water replenishment is used to accelerate water circulation to ensure that no salt is precipitated, and a certain macroscopic shape of photothermal bodies is set. Self-removal of solid salt and ...

AI Technical Summary

Problems solved by technology

The method of continuous excessive water replenishment makes the heat energy converted by the photothermal body due to the absorbed sunlight partly lost with the replenished seawater, which greatly inhibits the utilization efficiency of the light energy of the photothermal body. The method of removing the salt content cannot completely remove the precipitated solid salt, and the solid salt often needs to reach a certain quality before falling off by itself. During the time period when the solid salt exists, the solar light absorption efficiency of the photothermal body is restricted.

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