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High temperature resistant inorganic catalytic coating and porous honeycomb metal combustion plate coated with the coating

A technology of honeycomb metal and catalytic coating, which is applied in the field of porous honeycomb metal combustion plates, can solve the problems of accelerated carrier pulverization, lack of catalytic combustion effect, thinning, etc., and achieves excellent resistance to sudden cooling and heat, good Catalytic combustion performance, the effect of increasing the contact area

Inactive Publication Date: 2017-01-25
广州祥美环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used porous honeycomb metal carrier is generally coated with a layer of combustion protection coating on the combustion channel of the carrier; organic matter is used as a binder in this coating, which mainly plays the role of appearance decoration of new products. The withstand temperature is 400-600°C. During use, due to the decomposition of organic matter, many choking odors harmful to the environment and the human body will be released. Therefore, the so-called catalytic combustion effect will not be achieved; when the temperature exceeds 600°C The coating is ablated and disappears, so that the metal substrate of the carrier is exposed in the high-temperature gas, and the protective effect of the coating on the metal substrate is lost; the combustion temperature of the infrared combustion plate is 700-1000 ° C, at such a high temperature, The exposed metal reacts chemically with the oxygen in the gas, transforms into loose oxides and continuously ablates and falls off; in addition, when the exposed carrier is splashed with salty soup during use, the halogen and sulfur in the soup The plasma will have a strong chemical reaction with the metal, which further accelerates the oxidation of the metal carrier and the brazing material, and accelerates the pulverization of the carrier, resulting in the continuous thinning of the carrier thickness and the desoldering of the carrier foil due to the lack of brazing material. There are gaps in the core grid of the carrier. When the carrier is thin enough to a certain extent, or the gap between the carrier foils is too large, it is easy to cause safety accidents such as tempering of infrared burners such as stoves.
Therefore, the infrared metal combustion plate using this method has a short service time and poor infrared effect, and the powdery oxide produced after the metal carrier is oxidized is scattered around with the combustion hot air flow, causing further indoor environmental pollution. , energy saving, environmental protection, and high-efficiency infrared combustion performance cannot be reflected, which seriously affects the wide application of metal infrared combustion products

Method used

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  • High temperature resistant inorganic catalytic coating and porous honeycomb metal combustion plate coated with the coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] figure 1 It is an infrared combustion plate coated with a high-performance catalytic combustion catalyst, packaged and fixed in the combustion chamber shell of the burner; the gas raw material passing through the metal honeycomb combustion fire hole 1 control valve and the combustion air passing through the metal honeycomb combustion plate 2 control valve, According to the set amount, it enters the gas mixing chamber 3 for uniform mixing; the mixed gas is input into the combustion chamber of the metal carrier channel 6 infrared combustion unit through the pipeline and then evenly distributed, and the gas forms a uniform gas between the fire holes of the infrared combustion plate. Then the gas and air inlet 4 are ignited to start combustion. Under the action of the high-performance combustion-supporting catalyst, the gas burns violently and fully, and a large amount of heat energy is directly transferred to the heated object through the generated infrared radiation; Each...

Embodiment 2

[0024] figure 1 It is an infrared burner equipped with a porous honeycomb metal combustion plate. It is composed of an air intake injection system, a combustion chamber shell, an air distribution device, and a metal honeycomb infrared combustion plate. Fuel and air (referred to as gas) are mixed and enter the gas mixing chamber 3 of the burner from the gas and air inlet 4. The gas is evenly distributed in the gas mixing chamber, and then reaches the fire hole through many pipes on the carrier. At this time, the ignition The final gas undergoes complete catalytic combustion on the surface of the high-temperature-resistant catalytic coating, and the surface of the fire hole heats up rapidly due to the huge energy released by the catalytic combustion, producing a bright and uniform infrared combustion effect. In this way, the heat accumulated on the surface of the fire hole It continuously radiates outwards in the form of infrared rays, giving full play to the excellent performan...

Embodiment 3

[0027] Catalyst mineralization coating: by weight percentage, 5% magnesium oxide, 25% mixed water glass, 15% pseudoboehmite, 3% nickel oxide, 6% cobalt oxide, 5% mixed rare earth oxide, 15% color masterbatch Material, 26% purified water.

[0028] Step A: The metal carrier must be pretreated: remove oil, dust, burrs and other impurities attached to the surface of the carrier channel during the manufacturing process, and then perform surface oxidation treatment at 300 ° C for 3 hours;

[0029] Step B: Along the direction of the fire hole channel of the metal carrier, apply the catalyst mineralization coating on the pretreated metal carrier fire hole channel, and then dry and sinter mineralization at 200°C to obtain a firm adhesion A porous honeycomb metal combustion plate is prepared on the metal carrier channel.

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Abstract

The invention provides a high-temperature-resistant inorganic catalytic coating and a porous honeycomb metal burning board coated with the same. The high-temperature-resistant inorganic catalytic coating comprises the following components in percentage by weight: 5-10% of a magnesium-containing compound, 10-25% of mixed water glass, 15-32% of pseudo-boehmite, 3-7% of a nickel-containing compound, 3-6% of a cobalt-containing compound, 2-5% of mixed rare earth oxide, 5-15% of colour masterbatch and 20-30% of purified water. By adopting the technical scheme, the high-temperature-resistant inorganic catalytic coating has the advantages that after a high-temperature-resistant burning-assisted catalyst coating composed of magnesium oxide, aluminium silicate, an inorganic material and the like is utilized for coating the metal burning board, the contact area between a fuel and oxygen is effectively increased, free energy of reaction of the fuel is reduced in the presence of a catalyst, a chemical reaction is carried out at a lower temperature, and the fuel is more uniformly, completely and thoroughly burned, so that the utilization rate of the fuel and the thermal efficiency of a gas stove are improved.

Description

technical field [0001] The invention relates to a high temperature resistant inorganic catalytic coating and a porous honeycomb metal combustion plate coated with the coating. Background technique [0002] Using the good properties of metal materials to make porous honeycomb metal plates (also called metal honeycomb carriers, referred to as metal carriers), gas is burned by infrared rays in stoves, heating and other equipment, and more and more attention has been paid to it. The currently used porous honeycomb metal carrier is generally coated with a layer of combustion protection coating on the combustion channel of the carrier; organic matter is used as a binder in this coating, which mainly plays the role of appearance decoration of new products. The withstand temperature is 400-600°C. During use, due to the decomposition of organic matter, many choking odors harmful to the environment and the human body will be released. Therefore, the so-called catalytic combustion effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/00
Inventor 石江潭
Owner 广州祥美环保科技有限公司
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