PTFE composite filter bag having high-temperature catalytic decomposition function and preparation method thereof

Abstract

The invention discloses a PTFE composite filter bag having high-temperature catalytic decomposition function and a preparation method thereof. The filter bag comprises a composite filter bag body, the material of the composite filter bag body is punched felt or non-woven fabric, a dustward surface of the composite filter bag body is covered with a smooth layer, an adsorption layer is arranged between the dustward surface of the composite filter bag body and the smooth layer, and is used for adsorption and catalytic decomposition of the poisonous and harmful gas in flue dust. The PTFE composite filter bag can filter the flue dust and dust generated during the industrial production processes such as garbage burning, coal-fired power generation and metal smelting, and performs direct catalytic decomposition of the poisonous and harmful gas which is discharged into atmosphere.

Description

technical field [0001] The invention relates to the field of high-temperature air filtration, mainly for the dust and toxic and harmful gases that are easily produced in industrial fields such as garbage incineration, coal-fired power generation, and metal smelting. More specifically, it relates to a PTFE composite filter with high-temperature catalytic decomposition function. Bag and method for making same. Background technique [0002] During the "Twelfth Five-Year Plan" period, the amount of waste incineration in my country continued to increase, and the "Thirteenth Five-Year Plan" pointed out that my country should increase investment in the treatment of waste incineration. [0003] my country's municipal solid waste generally has problems such as high humidity and unclear classification, so it is easy to produce some toxic and harmful gases such as dioxins during the process of waste incineration. At present, the high-temperature filter materials commonly used in the m...

AI Technical Summary

Problems solved by technology

At present, the high-temperature filter materials commonly used in the market in my country are mainly aimed at solid dust generated during the combustion process, and among these high-temperature filter materials, PTFE needle-punched high-temperature filter materials can filter solid dust with a filtration efficiency higher than 99.9%, but , in the process of filtering, some toxic and harmful gases are still discharged into the atmosphere

[0004] At present, domestic emission control of toxic and harmful gases mainly adopts the method of improving the filtration accuracy of the bag filter and then using activated carbon adsorption. This method seems to be effective, but the adsorbed activated carbon containing toxic and harmful gases and Fly ash must be treated as hazardous waste for secondary treatment, and the accumulated consumption of activated carbon and disposal of toxic, hazardous and hazardous waste will greatly increase the operating costs of waste incineration plants and other enterprises

In order to reduce costs, most enterprises adopt the method of landfill disposal, and bury activated carbon and fly ash containing toxic and harmful gases in designated places. Although this method has low operating costs, the dioxins and other poisonous Harmful gases are difficult to decompose, which will cause secondary pollution to the soil and groundwater around the landfill site, and it will only transfer the pollution in the air to the ground

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