Device with efficient photo-thermal conversion performance and application of device

A light-to-heat conversion and performance technology, applied in the directions of solar thermal energy, solar thermal power generation, solar thermal collectors, etc., can solve the problems of membrane pollution and the increase of spatial geometric size, so as to avoid precipitation pollution, efficient absorption and utilization, and maintain temperature. Effect

Active Publication Date: 2021-05-04
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, due to the increase of the spatial geometric size, the transmission and diffusion of water and ions become an important factor restricting the photothermal evaporation rate, resulting in the contamination of the membrane by salt precipitation.

Method used

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  • Device with efficient photo-thermal conversion performance and application of device
  • Device with efficient photo-thermal conversion performance and application of device
  • Device with efficient photo-thermal conversion performance and application of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A method for preparing a device with high-efficiency light-to-heat conversion performance, consisting of figure 1 Shown:

[0065] 1) The preparation method of each photothermal capillary with high-efficiency photothermal conversion performance:

[0066] (1) Immerse each aluminum oxide capillary with an inner diameter of 1.0mm, a wall thickness of 0.65mm, and a length of 25mm to a concentration of 0.5molL -1 In the ammonium persulfate aqueous solution, let it stand at room temperature for 30 minutes, take it out, and blow dry at room temperature.

[0067] (2) Put 6 μL of pyrrole in a container, and seal the multiple aluminum oxide capillaries loaded with ammonium persulfate oxidant obtained by the method prepared in step (1) together in the container. Incubate at 50°C for 2 hours. The amount of pyrrole used is equivalent to 0.55 μL corresponding to the surface area of ​​the hollow fiber base material per square centimeter.

[0068] (3) Wash the surface-modified alumi...

Embodiment 2

[0096] The difference from Example 1 is:

[0097] Replace the aluminum oxide capillary in step (1) with silicon oxide, porous ceramics, diatomaceous earth, or hydrophilic cellulose acetate, polycarbonate, polyamide, mixed cellulose ester, polyacrylonitrile, polyethylene film.

Embodiment 3

[0099] The difference from Example 1 is:

[0100] Replace the photothermal material in step (1) with carbon nanotubes, graphene, carbon quantum dots, activated carbon, ink or one or more mixed carbon materials, or spinel oxides formed of cobalt and other metals or a black dye of a mixture of several oxides.

[0101] The modification method was changed to physical deposition. Specifically: prepare N-methylpyrrolidone solution of carbon-containing material or aqueous solution / suspension of cobalt-containing black dye at a concentration of 0.1 wt%, block one end of the capillary, and deposit the photothermal material by vacuum filtration to the capillary surface, dried as Figure 11 visible.

[0102] Depend on Figure 11 It can be seen that the photothermal capillary with the photothermal layer of carbon nanotubes can be prepared by decompression and suction filtration. When pure water is dropped on the surface of the photothermal capillary, the water contact angle on the sur...

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Abstract

The invention belongs to the field of energy environment application, and particularly relates to a device with efficient photo-thermal conversion performance and application of the device. The device is composed of a plurality of porous capillary tubes with hollow structures and at least one layer of supporting plate with floating capacity. The supporting plate is provided with through holes, and the porous tubes with the hollow structures are inserted into the through holes. The device is applied to seawater evaporation desalination. According to a vertical array structure of the photo-thermal capillary tubes with efficient photo-thermal conversion performance, efficient absorption and utilization of irradiation angle light are achieved, and the evaporation efficiency and temperature are kept. Meanwhile, the capillary tube structure promotes transmission and diffusion of water and ions, and salt ion precipitation pollution is avoided while evaporation water supply is guaranteed.

Description

technical field [0001] The invention belongs to the field of energy and environment applications, and in particular relates to a device with high-efficiency light-to-heat conversion performance and its application. Background technique [0002] The seawater evaporation process driven by sunlight can directly separate fresh water from the ocean, which is an ideal way of seawater desalination and has a high application prospect. Following the example of nature, human beings make use of the process of natural evaporation and separation of fresh water through solar stills. However, the natural evaporation process is slow and the efficiency is low, so the application is greatly limited, and it cannot meet the daily water demand in coastal and island areas. [0003] Using photothermal materials that can efficiently capture and convert solar energy into heat energy, concentrated heating of the evaporation interface can obtain a high evaporation interface temperature, thereby accel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24S10/70F24S20/70F24S70/20C02F1/14C02F103/08
CPCF24S10/70F24S20/70F24S70/20C02F1/14C02F2103/08Y02E10/44Y02E10/47Y02A20/212Y02A20/124Y02A20/142
Inventor 江河清王玉超
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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