Integrated filtering material, preparation method and applications thereof

Abstract

The invention provides an integrated filtering material, a preparation method and applications thereof, wherein the filtering material comprises a commercial dust removal filtering material and a catalyst growing on the filtering material and capable of simultaneously decomposing nitric oxide and dioxin. The preparation method comprises the following steps: impregnating a filtering material with aprecursor solution of manganese oxide and cerium oxide, and growing the manganese oxide and the cerium oxide on the filtering material through a chemical reaction; and impregnating the filtering material by using vanadium oxytrichloride as a precursor of vanadium oxide, carrying out a reaction in water, and carrying out drying, hydrothermal treatment and other processes to obtain the product. Theprepared composite filtering material can remove three pollutants in flue gas at the same time, and the catalyst is firm in loading and not prone to falling off.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to an integrated filter material and its preparation method and application. Background technique [0002] Domestic waste incineration technology is replacing traditional landfill technology and has become the first choice for domestic waste disposal due to its advantages of complete harmlessness, remarkable reduction effect, and waste heat after incineration that can be used as secondary energy. During the incineration process of garbage, dust, nitrogen oxides, dioxins and other pollutants will be produced, causing secondary pollution. Existing treatment technologies have been able to remove or degrade these pollutants separately, so that the flue gas can be discharged up to the standard, but the treatment equipment is often expensive in construction and operation costs, and occupies a large area, which limits the development of waste incineration technology. [0003] Most of the existing...

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Problems solved by technology

However, there are few invention patents for decomposing nitrogen oxides and dioxins while removing dust

[0004] In addition, there are three main methods for preparing the existing composite filter material. The most common method is to grind the catalyst into particles of a certain size, and load them on the formed dust filter material by physical means, such as impregnation and suction filtration. The process is simple, but the loading strength of the catalyst is low, and the pollutant treatment effect is poor; the second method mixes the catalyst particles and the slurry for preparing the dust filter material evenly, and weaves a composite filter through extrusion, opening, acupuncture and other processes. material, this preparation method has higher requirements on cost and technology; the third method impregnates the solution of the catalyst precursor on the dust removal filter material, and grows the required catalyst on the filter material through chemical reaction. The synergistic removal effect of pollutants is better, but the loading capacity is uncontrollable, and it is limited by the process that most catalysts need to be calcined at high temperature. This method is limited to several specific catalysts as the active components of the composite filter material.

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