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

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...

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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

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