Flue gas purifying filter material for semi-dry desulphurization and preparation method thereof

Abstract

The invention discloses a flue gas purifying filter material for semi-dry desulphurization and a preparation method thereof. The flue gas purifying filter material for semi-dry desulphurization is compounded by an expanded polytetrafluoroethylene micropore thin layer and a blended needled felt layer; the blended needled felt is compounded by a blended composite dust facing surface layer, a corrosion resisting enhanced base cloth layer and a blended composite gas cleaning surface layer which are connected in order, wherein the expanded polytetrafluoroethylene micropore thin layer and the blended composite dust facing surface layer are connected. The flue gas purifying filter material for semi-dry desulphurization has warp and weft strength which are higher than 900N / 50mm, warp and weft elongation at break which are less than 15%, and high dimension stability; the filter material can tolerate high temperature which is 250 DEG C or above, and application temperate is wide; corrosion resistance is good, and inoxidizability is good; the polytetrafluoroethylene film has smooth surface, and dust-cleaning efficiency is high and reaches 99.999%; the filter material has the advantages of low friction, flame retardancy, insulating properties, and heat insulation property; the material has long service life; and the material has high filtering efficiency, high filtration accuracy, water resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a semi-dry desulfurization flue gas purification filter material and a preparation method thereof, belonging to the field of industrial dust removal filter materials. Background technique [0002] In recent years, in the field of high-temperature industrial smoke and dust filtration in my country, bag-type dust collectors have become more and more widely used due to their good working conditions and practicability, especially their superior filtration performance. With the increasingly stringent national and local environmental protection regulations and standards, the development of such high-temperature resistant filter materials is obviously insufficient for flue gas dust removal and ultra-low dust emission in some specific working conditions. [0003] At present, in the fields of steel, cement, electric power, chemical industry and other industries, after industrial fumes are generated, the enterprises mostly depend on thei...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a semi-dry desulfurization flue gas purification filter material and its preparation method, to solve the problem of dust sticky bag, not resistant to hydrolysis, low filtration efficiency, high resistance Poor corrosion and other issues

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