Filtering material for high-temperature smoke and dust and preparation method thereof

Abstract

The invention discloses a filtering material for high-temperature smoke and dust and a preparation method thereof. The filtering material is composed of five layers of symmetric composite structures and comprises high-temperature-resistant fiber nonwoven cloth on the outermost layers, high-temperature-resistant fiber woven cloth on the layers close to the outermost layers and superfine glass fiber nonwoven cloth on the middle layer. The preparation method includes: using the superfine glass fiber nonwoven cloth as a core filtering layer and composites of the high-temperature-resistant nonwoven cloth and the high-temperature-resistant woven cloth as upper and lower coating layers of the superfine glass fiber nonwoven cloth; reinforcing through ultrasonic binding or stitching with high-temperature-resistant stitching lines to prepare the filtering material. The filtering material can realize long-acting, low-resistance and high-accuracy filtering, so that energy consumption and raw material cost during use are lowered greatly.

Description

technical field [0001] The invention relates to a non-woven composite filter material, in particular to a filter material for high-temperature smoke and dust and a preparation method thereof. Background technique [0002] In response to the current severe air pollution situation, the state actively promotes air pollution control and has repeatedly raised the emission standards of smoke (powder) and dust in key industries. Although these measures have played a certain role in promoting the prevention and control of air pollution in my country, they have failed to fundamentally solve the problem of excessive PM2.5 concentrations. The reason is that PM2.5 particles are one of the main components of smog and the most difficult to remove. At present, the high-temperature-resistant smoke and dust filter bag filter widely used in the steel, electric power, cement and waste incineration industries in China generally has a filtration efficiency of more than 99.9% for removing PM10 p...

AI Technical Summary

Problems solved by technology

There are many types of glass fiber filter materials, ordinary glass fiber is brittle, which leads to poor flexibility and spinnability of pure glass fiber needle-punched filter materials, and difficult processing

Application No. 201120458469.1 discloses a glass fiber-coated filter material, which is to improve the surface smoothness of the filter material by impregnating the glass fiber needle felt with PTFE emulsion and then covering it with a microporous polytetrafluoroethylene film. , water vapor repellency, chemical stability and strength, and folding resistance, but failed to effectively remove fine particles such as PM2.5 in high-temperature dust. 1200-1800Pa), high frequency of backwashing, high cost of raw materials and high operating cost

The ultrafine fiber filter material used for normal temperature filtration, such as: spunbonded ultrafine fiber, melt blown ultrafine fiber, sea island ultrafine fiber, etc., can effectively filter PM2.5, and has low filtration resistance, but it is not resistant to high temperature and It is not easy to clean the dust after holding the dust, so it cannot be applied to high-temperature dust filtration

In addition, most of the current filter bag sutures are stitched with thread, and some studies have shown that it has a certain impact on the filtration performance of the filter bag.

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