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Production method of solar absorber plate

A technology for a solar heat absorbing panel and a production method, which are applied in the directions of electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problem of large area coating preparation, high production cost, and solar selective absorption coating preparation technology. It is difficult to realize and other problems, and achieves the effect of low production cost, good corrosion resistance and good wear resistance.

Inactive Publication Date: 2010-09-01
GANSU JINSHI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The invention provides a production method of a solar heat absorbing plate to solve the deficiency of the existing technology for preparing a solar selective absorption coating and the problems that the existing technology is difficult to realize the preparation of a large-area coating and the production cost is high

Method used

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  • Production method of solar absorber plate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The chemical composition of the chromium alloy steel plate to be colored: C 0.34%; Cr 17.95%;

[0040] Follow the steps below to implement shading:

[0041] 1. Degreasing the chromium alloy steel, the degreasing agent is composed of 35g / L sodium hydroxide, 48g / L sodium carbonate and 3g / LOP emulsifier. The degreasing temperature is 68° C., and the degreasing time is 10 minutes.

[0042] 2. After washing the degreased alloy steel plate with water, carry out chemical polishing treatment. The formula of polishing agent used is sulfuric acid 160g / L, hydrochloric acid 36g / L, nitric acid 9g / L. The polishing temperature is 40° C., and the polishing time is 2 minutes.

[0043] 3. After the chemically polished alloy steel plate is washed with water, it is activated. The formula of the activator used is 82g / L phosphoric acid. The activation temperature is room temperature and the time is 2 min.

[0044] 4. After the activated alloy steel plate is washed with water, it is sub...

Embodiment 2

[0050] The chemical composition of the chromium alloy steel plate to be colored: C 0.21%; Cr 17.20%;

[0051] Follow the steps below to implement shading:

[0052] 1. Degreasing the chromium alloy steel, the degreasing agent is composed of 35g / L sodium hydroxide, 48g / L sodium carbonate and 3g / LOP emulsifier. The degreasing temperature is 68° C., and the degreasing time is 10 minutes.

[0053] 2. After washing the degreased alloy steel plate with water, carry out chemical polishing treatment. The formula of polishing agent used is sulfuric acid 160g / L, hydrochloric acid 36g / L, nitric acid 28g / L. The polishing temperature is 50° C., and the polishing time is 2 minutes.

[0054] 3. After the chemically polished alloy steel plate is washed with water, it is activated. The formula of the activator used is 82g / L phosphoric acid. The activation temperature is room temperature and the time is 2 min.

[0055] 4. After the activated alloy steel plate is washed with water, it is su...

Embodiment 3

[0061] The chemical composition of the chromium alloy steel plate to be colored: C 0.27%; Cr 15.43%;

[0062] Follow the steps below to implement shading:

[0063] 1. Degreasing the chromium alloy steel, the degreasing agent is composed of 35g / L sodium hydroxide, 48g / L sodium carbonate and 3g / LOP emulsifier. The degreasing temperature is 68° C., and the degreasing time is 10 minutes.

[0064] 2. After washing the degreased alloy steel plate with water, carry out chemical polishing treatment. The formula of the polishing agent used is sulfuric acid 68g / L, hydrochloric acid 26g / L, nitric acid 7g / L. The polishing temperature is 35° C., and the polishing time is 2 minutes.

[0065] 3. After the chemically polished alloy steel plate is washed with water, it is activated. The formula of the activator used is 65g / L phosphoric acid. The activation temperature is room temperature and the time is 2 min.

[0066] 4. After the activated alloy steel plate is washed with water, it is ...

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Abstract

The invention discloses a production method of a solar absorber plate, which aims at solving the deficiency of the preparation process technology of the existing solar selective absorbing coating, difficult realization of preparation of large-area coating with the existing process technology, and high manufacturing cost. The production method comprises the following steps: taking a chrome-base alloy steel plate as a matrix material; pre-processing the plate such as de-oiling, polishing, activating, washing and the like; taking nitric acid, manganese sulphate, ammonium nitrate and the like as main coloring agents, and then coloring by chemical oxidation blackening; and finally performing chemical solidification and seal treatment to obtain the chrome-base alloy steel solar absorber plate with uniform bright-black conversion coating on the surface. The chrome-base alloy steel solar absorber plate has the characteristics of high thermal absorption rate and low emission rate, can be taken as the solar absorber plate for solar photo-thermal conversion, and can be widely applied to solar heat utilization equipment such as a flat-plate solar air collector, a solar water heater and the like.

Description

technical field [0001] The invention belongs to the technical field of solar heat utilization, and relates to the preparation technology of a solar heat absorbing plate light-to-heat conversion film, in particular to a production method of a solar heat absorbing plate. Background technique [0002] In the 21st century, mankind will face the major challenge of achieving sustainable economic and social development. Economic development under the dual constraints of limited resources and strict environmental protection requirements has become a global hot issue. The energy problem will become more prominent, not only in the lack of conventional energy, but more importantly, a series of problems brought about by the development and utilization of fossil energy, such as environmental pollution, greenhouse effect and so on. The current environmental problems are largely caused by the development and utilization of energy (especially fossil energy). Therefore, in order to solve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
Inventor 武开鹏
Owner GANSU JINSHI CHEM
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