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Heat-absorbing coating and preparation method thereof

An endothermic coating, a technology of parts by weight, applied in the field of coatings, can solve problems such as influence

Active Publication Date: 2015-08-26
河北盛大普丰新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, although the coating formed by painting the heating surface of boilers and other heating equipment has the functions of beauty, heat resistance and corrosion resistance, it has no substantial impact on the heat conduction of boilers and the reduction of heat loss.

Method used

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  • Heat-absorbing coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 A heat-absorbing coating and its preparation method

[0050] The heat-absorbing paint is made of equal parts of powdery component A1, powdery component B1 and component C1, wherein component A1 includes chromium oxide green, cobalt oxide, manganese oxide and iron red powder; component B1 includes aluminum oxide , zinc oxide, bauxite powder, silicon carbide and bentonite; component C1 includes potassium silicate and silicon phosphate. The various materials and silicon phosphate in the above-mentioned component A1 and component B1 are all commercially available powdery materials.

[0051] The preparation method of the endothermic coating of the present embodiment is carried out according to the following steps:

[0052] (11) Preprocessing

[0053] Weigh 6kg of chromium oxide green, 4.5kg of cobalt oxide, 4.5kg of manganese oxide and 11kg of iron red powder to form a component A1, stir and mix and sinter in a muffle furnace to obtain a1;

[0054] Among them,...

Embodiment 2-6

[0071] Example 2-6 Heat-absorbing paint and preparation method thereof

[0072] The present embodiment is respectively a kind of heat-absorbing paint and preparation method thereof, and the preparation steps are similar to embodiment 1, and the weight of the potassium silicate used is 95kg, and the used sieve hole when cx (x=2-6) sieves is uniform. It is 325 mesh, the holding time in the heating stage is the same, the method in the cooling stage is also the same, and the ball-to-material ratio is 3:1 during ball milling. The only difference is that the ingredients and other control parameters in the preparation process are different. See Table 1 and Table 2.

[0073] Table 1 Ingredients of paint (except potassium silicate) table

[0074]

[0075] Table 2 Technical parameter table (part) in the coating preparation process

[0076]

[0077] The paint prepared in Examples 2-6 was brushed on the radiant heating surface of the boiler (the outer wall of the water-cooled ...

Embodiment 7

[0080] Example 7 Main technical indicators of energy-saving and heat-absorbing coatings

[0081] In this embodiment, the heat-absorbing coatings prepared in Examples 1-6 are detected, wherein, the detection of pH value and density is to directly use corresponding instruments to detect the finished coatings, and the rest of the technical indicators are all using Example 1 -The paint brush made in 6 is tested on the radiant heating surface of the boiler (the outer wall of the water-cooled wall tube) (the specific painting process is the same as that in Examples 1-6), and the specific technical indicators are shown in the table below.

[0082] Table 3 technical index table

[0083]

[0084] It can be seen from the above Table 3 that the heat-absorbing coating prepared by the present invention has good thermal shock resistance, thermal radiation performance, and erosion resistance, and it can reduce the thickness of soot formation without affecting the physical and chemical e...

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Abstract

The invention discloses a heat-absorbing coating. The heat-absorbing coating is composed of a powdered component A, a powdered component B and a powdered component C which are of equal parts. When the coating is coated on the heating surfaces of furnaces, such as a boiler, the heat absorption and transfer efficiency of radiation chamber furnace tubes can be increased, the utilization efficiency of effective heat energy is improved, the heating rate of the boiler can be significantly accelerated, and the heat-absorbing coating has the advantages of energy saving and environmentally friendliness. The invention also provides a preparation method of the heat-absorbing coating. The method sequentially includes the steps of pre-treatment of the component A, ball milling, spray drying, grinding, sieving, powder mixing and the like. The method is simple in process and easy to control. The heat-absorbing coating and the preparation method of the heat-absorbing coating are applicable to the preparation of heat-absorbing coatings. Further, the heat-absorbing coating can be coated on the heating surfaces of heat equipment, such as a boiler and an incinerator.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a heat-absorbing coating and a preparation method thereof. Background technique [0002] Infrared radiation heating is a new heating technology developed in the 1980s. It has the characteristics of direct energy radiation, high heat transfer efficiency, "matching" radiation and absorption curves, infrared radiation heating has high absorption rate, strong radiation directionality, energy concentration, and high energy-saving effect in the heat conduction process . [0003] During the heating process of the boiler, a large part of the heat will be lost, resulting in energy waste, not energy-saving, and not environmentally friendly. The work of the boiler includes three simultaneous processes: one is the combustion and heat release process of the fuel, the other is the heat transfer process of the flame and flue gas to the heating surface, and the third is the heat absorption process of t...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 赵强左宏
Owner 河北盛大普丰新技术有限公司
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