High mechanical property and low cost SCR denitration catalyst and preparation method thereof

Abstract

The invention provides a high mechanical property and low cost SCR denitration catalyst and a preparation method thereof. A steel screen or a reinforced glass fiber board is used as a framework material, and 78-80 weight parts of industrial grade and nano scale TiO2 is used as a composite carrier, wherein the weight parts of the industrial grade TiO2 are 5-8, and the balance is the nano scale TiO2; 13-27 weight parts of V2O5-WO3 / TiO2 roasting particle is used as batching seed crystal, and 9-10 weight parts of V2O5 and WO3 are used as active components, wherein the weight parts of the V2O5 are 1.5-2, and the balance is WO3; and 10-12 weight parts of ludox, methylcellulose, fiberglass yarn and ethanolamine are used as auxiliary agents, wherein the weight parts of the ludox, the methylcellulose, the fiberglass yarn and the ethanolamine are all 2.5-3.5. The invention reduces the preparation cost and the operation expense of the SCR denitration catalyst, and improves the mechanical properties of abrasion resistance, pressure resistance, strength, and the like of the catalyst.

Description

technical field [0001] The invention relates to the technical field of environmental protection for flue gas purification, in particular to an SCR denitrification catalyst with high mechanical performance and low cost and a preparation method thereof. Background technique [0002] Selective catalytic reduction method (SCR method), because of its high denitrification efficiency and mature technology, is currently the most widely used in flue gas denitrification projects at home and abroad. The catalyst is the core of the SCR process, and its cost usually accounts for 30-50% of the total investment of the denitration device, which has a direct impact on the total investment and operation. There are three main types of SCR denitration catalysts, namely noble metal catalysts, metal oxide catalysts and molecular sieve catalysts. [0003] Noble metal catalysts were developed in the 1970s and were first used for NO X reduced catalyst. At present, it is mainly used in low-tempera...

AI Technical Summary

Problems solved by technology

V2O 5 / TiO 2 SCR-based catalysts were successfully developed in Japan in the 1970s and were first commercially applied, and then quickly spread to Europe. At present, they are widely used in Asia, Europe and the Americas. This type of catalyst has high denitrification efficiency and selectivity. Strong, moderate reaction temperature (300 ~ 400 ℃), strong anti-poisoning ability, stable and reliable operation, etc., but due to the use of nano-sized TiO 2 , which is more expensive under the condition of high performance, and at the same time adopts the processing technology of coating or extrusion, so that the mechanical properties of the catalyst are not stable enough

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