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A kind of agricultural and forestry residue-based photothermal conversion material for water treatment, preparation method and application thereof

A light-to-heat conversion and residue technology, which is applied in energy wastewater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of low light-to-heat conversion efficiency, complex preparation process, and low degree of amplification, and achieve the goal of photothermal conversion. High heat conversion efficiency, simple reaction device, and low thermal conductivity

Active Publication Date: 2020-06-09
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high cost, low degree of amplification, complex preparation process, and low photothermal conversion efficiency in the prior art of using solar energy for water treatment photothermal conversion materials, the present invention provides an agricultural and forestry residue-based material for water treatment. Photothermal conversion materials, preparation methods and applications

Method used

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  • A kind of agricultural and forestry residue-based photothermal conversion material for water treatment, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Crush 30g of sawdust to particles with a particle size of 0.1cm, then add 1g of sodium silicate adhesive (manufacturer: Panjin Shengxin Water-based Adhesive Co., Ltd.), mix well, and press it into a thickness of 3cm with a hot press left and right wooden blocks. Adjust the temperature of the heating plate to 500°C, and then place the wood block on the heating plate for carbonization until the thickness of the carbonized layer is 0.3 cm, then stop. Place the compressed wood block in a container just enough to accommodate the wood block, add water to make the distance between the surface of the carbonized layer of the wood block and the water surface 1cm, and simulate the sun under 535nm laser irradiation with a simulated sun lighting device (Newport AM1.5) Light, irradiate the light on the surface of the carbonized layer, and measure it at 1-10kW / cm 2 Under the solar power density, the effect of this photothermal conversion material on water evaporation. Weight loss du...

Embodiment 2

[0026] Crush 25g of corn stalks to particles with a particle size of 0.2cm, then add 1.5g of magnesium oxide adhesive (manufacturer: Panjin Shengxin Water-based Adhesive Co., Ltd.) and mix evenly, then use a hot press to press it into a thick Straw blocks of about 2cm. Carbonize the surface of the straw block with a blowtorch until the thickness of the carbonized layer reaches 0.3 cm. Place the compressed straw block in a container that can just accommodate the straw block, add water to make the distance between the surface of the carbonized layer of the straw block and the water surface 1cm, and use a simulated solar lighting device (Newport AM1.5) to simulate under 535nm laser irradiation Sunlight, irradiating the light on the surface of the carbonized layer, respectively measured at 1-10kW / cm 2 Under the solar power density, the effect of this photothermal conversion material on water evaporation. Weight loss due to water evaporation was measured by using an electronic mi...

Embodiment 3

[0029]Crush 30g of sawdust to particles with a particle size of 0.1cm, then add 1g of sodium silicate adhesive (manufacturer: Panjin Shengxin Water-based Adhesive Co., Ltd.), mix well, and press it into a thickness of 3cm with a hot press left and right wooden blocks. 0.5 g of graphene is supported on the surface of wood block by vapor deposition method to form a graphene layer with a thickness of about 0.05 cm. The treated wood block is placed in a container that just accommodates the wood block, and water is added to make the distance between the surface of the graphene layer of the wood block and the water surface be 1cm, and the simulated sun lighting device (Newport AM1.5) is used to irradiate with a 535nm laser Simulate sunlight, irradiate the light on the surface of the carbonized layer, and measure it at 1-10kW / cm 2 Under the solar power density, the effect of this photothermal conversion material on water evaporation. Weight loss due to water evaporation was measure...

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Abstract

The invention discloses an agriculture and forestry residue-based photo-thermal converted material for water treatment, a preparation method and application thereof. The method comprises the following steps: by adopting the abundant agriculture and forestry residues in China as the raw materials, crushing and performing hot briquetting, and then carbonizing the surface or attaching the materials, such as graphene, carbon nano tube or other metal nanoparticles, to the surface, thereby forming a photo-thermal converted material with low upper layer heat conductivity coefficient, high photo-thermal conversion efficiency, excellent lower-layer water-absorbing property and double-layer structure. The compounding steps are simple, the reaction device is simple, the operation is convenient and the acquired material has high solar energy use ratio, is low in cost and can be used for multiple times, so that the problems of high cost, low amplifying degree, complex preparation technology, low photo-thermal conversion efficiency, and the like, of the present photo-thermal converted material for treating water by utilizing the solar energy can be solved, and the technical problems of environmental protection and safety can be considered.

Description

technical field [0001] The invention relates to an agricultural and forestry residue-based photothermal conversion material for water treatment, a preparation method and application thereof, and belongs to the field of photothermal conversion materials. Background technique [0002] With the steady improvement of people's living standards and the rapid development of my country's industrialization and modernization, water pollution and water shortages are one of the most challenging problems facing mankind. Conventional water treatment technologies have been used for many years, including adsorption, chemical treatment, membrane separation, and biological treatment. These technologies have made important contributions to water treatment in the last century. However, as people's demand for safe and clean water becomes more and more stringent, the development of these technologies is also facing a development bottleneck, and at the same time, higher requirements are put forwar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/02B32B9/04C02F1/14B32B21/02B32B21/12
CPCB32B9/007B32B9/02B32B9/048B32B21/02B32B21/12B32B2264/10B32B2264/105B32B2264/108B32B2307/302B32B2307/728C02F1/14Y02A20/124Y02A20/142Y02A20/212Y02W10/37
Inventor 刘鹤李兆双徐徐董阜豪商士斌宋湛谦宋杰
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY