A kind of preparation method of super high temperature resistant composite filter material

Abstract

The invention provides a preparation method of a super high temperature resistant composite filter material, which belongs to the field of material technology. The problem of insufficient high temperature resistance and other characteristics of the existing filter material is solved. The invention comprises a base cloth layer, one side of the base cloth layer is covered with a facing layer, and the other side is covered with a bottom layer, the base cloth layer is a filament mesh cloth, and the filament mesh cloth is made of basalt fiber; the facing layer It is the face mesh cloth, the face mesh cloth is made of Yilun chopped fiber, the bottom layer is the bottom mesh cloth, the bottom mesh cloth is made of Yilun chopped fiber, and the weight of the Yilun chopped fiber is 2.20dtex ~2.24dtex, the length is 60mm~68mm; the base fabric layer, facing layer and bottom layer are all immersed in impregnating agent, and the impregnating agent adopts water-based polyimide resin composite solution. The invention has more excellent performances in high temperature resistance, high temperature hydrolysis resistance, high temperature strength retention and high temperature oxidation resistance.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a filter material used for treating harmful discharge substances, in particular to a preparation method of a composite filter material with super high temperature resistance. Background technique [0002] Environmental pollution has become an important factor affecting the sustainable development of society and economy, which has attracted great attention from the society and the government. Due to the continuous improvement of environmental protection requirements, the government has successively issued many more demanding and stricter air pollutant emission standards. [0003] At present, the bag dust removal technology is one of the main means of flue gas dust removal, and the filter material is the core component that determines the effect of the filter. The application market has put forward higher requirements for the performance of high-temperature resistant filter materi...

AI Technical Summary

Problems solved by technology

[0006] 2. High-temperature hydrolysis resistance: Many high-temperature flue gases have high water content, such as garbage incinerators, and the current filter material has poor high-temperature hydrolysis resistance, which shortens the service life of the filter bag

Especially the filter material of glass fiber base cloth, due to the poor high temperature hydrolysis resistance of glass fiber, it is easy to cause damage when it is used in a high temperature flue gas environment with high humidity

[0007] 3. High temperature strength retention: The current post-treatment impregnating agent of filter material is mainly acrylic resin, and the long-term high temperature resistance of acrylic resin is lower than 200 degrees, and thermal decomposition begins to occur when the temperature exceeds 260 degrees. The bonding strength between the facing layer, the bottom layer and the base fabric decreases rapidly

[0008] 4. Resistance to high temperature oxidation: The structure of flue gas components is complex, usually containing various corrosive gases, and under high temperature conditions, corrosive gases are more corrosive to the filter fiber, and the current high temperature corrosion resistance of the filter fiber sex is relatively poor