Multi-effect adsorption filter for treating waste gas containing hydrogen fluoride and its preparation method

Abstract

The invention discloses a multi-effect adsorption filter for treating waste gas containing hydrogen fluoride, which is prepared by the following raw materials, on a weight basis, 20-30 parts of sludge, 10-14 parts of high alumina bauxite, 55-65 parts of bamboo charcoal powder, 8-10 parts of hollow glass microbeads, 4-8 parts of nano titanium dioxide, 1.2-2.3 parts of sodium benzoate, 0.8-1.3 parts of zinc chloride, 2.1-3.5 parts of cellulose ether, 0.4-0.8 parts of cetylpyridinium bromide, 9-12 parts of hemp pulp, and a moderate amount of water. The inventive adsorption filter has the advantages of rough and rigid surfaces, large specific surface area, high porosity, good adsorption filtration performance, low cost and easy promotion and application; the nano titanium dioxide is loaded on the surface of the bamboo charcoal powder through a physical and chemical modification method, which can decompose organic pollutants into carbon dioxide and oxygen gas, so as to reduce the harmful substances adsorbed on the bamboo charcoal powder, prolong the service life of the adsorption filter; and the adsorption filter is suitable for dedusting and hydrogen fluoride adsorption in aluminium electrolysis industry by spraying it on the deduster filter materials.

Description

Technical field [0001] The invention relates to the technical field of adsorption filter materials, in particular to a multi-effect adsorption filter for processing hydrogen fluoride-containing waste gas and a manufacturing method thereof. Background technique [0002] With the rapid development of industrialization, air quality problems have become increasingly severe. Especially in recent years, smog across the country has seriously threatened people’s health, and the side effects brought by it have become increasingly serious. The culprits are domestic building materials, chemicals, At present, the most commonly used dust removal equipment is the bag filter for the smoke and dust discharged from the kiln head and kiln tail, calcium carbide furnace, and ferroalloy furnace in metallurgy and other industries. The bag filter is a dry filter device. After the filter material is used for a period of time, due to the effects of sieving, collision, retention, diffusion, static electri...

AI Technical Summary

Problems solved by technology

However, in the actual operation process, the use of the first layer is not enough, resulting in low dust removal effect and serious wear and corrosion of the filter material after long-term use. There is an urgent need for an adsorption filter with high efficiency and multiple functions to be sprayed on the filter before the dust collector starts to work. The surface of the material is used as the first layer, which can not only improve the dust removal effect of the dust collector, but also filter and absorb the harmful exhaust gas discharged.