Preparation method for ultra-temperature composite foam coating filtering material

Abstract

The invention discloses a preparation method for an ultra-temperature composite foam coating filtering material, and belongs to the technical field of smoke filtering materials. The preparation methodcomprises the following steps: opening basalt chopped strand filaments and poly(p-phenylenebenzobisoxazole) fibers, adding basalt base cloth in the middle, after needling compositing, to obtain a plain felt; after performing chemical processing on the plain felt, forming a needled felt; coating the surface of the needled felt with PTFE foam emulsion, and pre-baking and baking to form a foam coating, to obtain the ultra-temperature composite foam coating filtering material, wherein a pre-baking temperature is 116-124 DEG C, a baking temperature is 190-220 DEG C, and a travel speed is 4-7 m / min. The filtering material adopts the basalt base cloth. The basalt base cloth is capable of improving strength of a base material of the filtering material, and greatly increasing temperature toleranceof the filtering material. The basalt base cloth is used for prolonging adaptive capacity of the filtering material in a high-temperature environment and reducing strong attenuation ability of the filtering material in an ultra-temperature deduster.

Description

technical field [0001] The invention discloses a preparation method of an ultra-high temperature composite foam coating filter material, which belongs to the technical field of smoke filter material. Background technique [0002] In recent years, my country's heavy chemical industry (electric power, building materials, metallurgy, chemical industry, etc.) based on resources and energy consumption has developed rapidly. Non-ferrous metals, fertilizer producing countries. Accompanied by serious environmental pollution problems, the economic losses caused by environmental pollution such as air, water and industry amounted to more than 100 billion RMB per year, and the investment in environmental protection during the Tenth Five-Year Period in my country reached 2.2% of GDP (2004 GDP is 13.65 trillion RMB). Air pollutants in the heavy chemical industry are mainly characterized by high-temperature flue gas, and soot particles are one of the main control objects. As a total contr...

AI Technical Summary

Problems solved by technology

Due to the low air permeability of the existing filter materials, the energy consumption of the equipment is high; and the temperature resistance level of the filter materials is low. The filter materials on the existing market are generally: low-temperature filter materials with a temperature resistance of 90~150°C , the temperature resistance of the medium temperature filter material is 160~200℃, and the temperature resistance of the high temperature filter material is 240~280℃