Exhaust purification cellular catalyst for enamelling machine and method of producing the same

Abstract

The invention discloses a honeycomb catalyst for purifying the waste gas of enameling machines, which adopts catalytic combustion method to purify the industrial waste gas. The invention also discloses a preparation method of the catalyst. The invention adopts the technical proposal that the honeycomb catalyst for purifying the waste gas of enameling machines adopts the metallic honeycomb or honeycomb ceramics as ceramic frames; a coating made of mixture of ceria-zirconia solid solution and gamma-alumina is covered on the ceramic frames; the ceria-zirconia solid solution is loaded with noble metal palladium, platinum or palladium and platinum. The honeycomb catalyst has the advantages of less liability to deactivation of high temperature sintering and long service life.

Description

technical field [0001] The invention discloses a honeycomb catalyst for purifying waste gas of an enameling machine by using a catalytic combustion method to purify industrial waste gas, and at the same time, the invention also discloses a preparation method of the catalyst. Background technique [0002] The enameled paint used in the production of enameled wires contains a large amount of diluents and organic solvents, and its main components are benzene, xylene and cresol. These organic compounds are volatilized from the paint film when it is heated and cured. If these solvents are directly volatilized into the atmosphere, the following problems will occur: (1) Pollution of the environment: benzene, xylene and cresol compounds cause great damage to people's physical and mental health; (2) Energy waste: three organic compounds have high combustion The calorific value is generally 32406~43208kJ / kg; (3) Hidden danger of production safety: the distillation range of xylene is 1...

AI Technical Summary

Problems solved by technology

If these solvents are directly volatilized into the atmosphere, the following problems will occur: (1) pollute the environment: benzene, xylene and cresol compounds will cause great damage to people's physical and mental health; (2) waste of energy: three organic compounds have high combustion Calorific value, generally 32406~43208kJ / kg; (3) Potential safety hazards in production: the distillation range of xylene is 130℃~150℃, and the distillation range of cresol is 190~210℃. During the production process, organic matter may condense and accumulate in Pipeline, thus causing production safety accidents

At present, this type of catalyst uses cordierite as a carrier, and then supports noble metal Pd or transition metal oxides, but the cordierite carrier has many micropores, the exhaust back pressure is high, and the temperature of the catalyst bed is 60-100°C higher than the temperature before catalysis. , it is easy to cause high-temperature sintering deactivation of the catalyst; at the same time, hydrocarbons are very easy to deposit on the surface of the honeycomb carrier, so that the catalyst is physically poisoned and the service life of the catalyst is shortened

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