High-temperature-resistant aramid filter cloth capable of facilitating dust removing and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant aramid filter cloth capable of facilitating dust removing and a preparation method thereof. The filter cloth comprises a middle base cloth layer, a superfine fiber dust-facing surface layer formed by NOMEX fibers and meta-aramid fibers in a net laying mode, a breathable air-purifying surface layer formed by meta-aramid fibers in a net laying mode, and a PTFE emulsion dipping layer containing high-fineness talcum powder. NOMEX fibers and meta-aramid fibers are used for forming a base material in a laying mode, and then the base material and corrosion-resistant and oxidation-resistant PTFE base cloth are combined and felted to prepare the filter cloth, so that the strength and filter precision of the filter cloth are improved; meanwhile, PTFE emulsion containing high-fineness talcum powder is used for performing dipping treatment in the preparation process, so that the surface of the filter cloth has certain hydrophobicity, and the acid and alkaline corrosion resistance of the filter cloth is improved; moreover, the surface smoothness of the filter cloth is improved, the dust removing rate is increased, the dust holding capacity is small, and dust removing is easier.

Description

technical field [0001] The invention relates to the field of waste gas treatment, in particular to an aramid composite high-temperature-resistant filter cloth with an easy-to-clean function and a preparation method thereof. Background technique [0002] The bag filter is a high-efficiency dry dust collector, which relies on a filter bag made of fiber filter material to purify the gas through the dust layer formed on the surface of the filter bag. For almost all dust in general industry, its dust removal efficiency may reach more than 99%. In the field of high-temperature dust removal, high-temperature-resistant aramid fiber needle-punched felt is often used as the filter medium. Organic chemical components and moisture will be quickly hydrolyzed and damaged, and because aramid fiber is a thermosetting fiber, it can only be singed but not calendered, resulting in rough surface of needle felt after singeing, especially in asphalt concrete mixing dust collector A large amount...

AI Technical Summary

Problems solved by technology

In the field of high-temperature dust removal, high-temperature-resistant aramid fiber needle-punched felt is often used as the filter medium. Organic chemical components and moisture will be quickly hydrolyzed and damaged, and because aramid fiber is a thermosetting fiber, it can only be singed but not calendered, resulting in rough surface of needle felt after singeing, especially in asphalt concrete mixing dust collector A large amount of dust adheres to the dust collector when it is used in the environment, and it is unfavorable to clean the dust during the atmospheric blowback process of the dust collector, which leads to a sharp drop in the output of the asphalt mixing plant in unit time, and the work efficiency becomes low.

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