Selective catalytic reduction flue gas denitration catalyst and production method thereof

Abstract

The invention relates to a gas denitration catalyst, in particular to a honeycomb denitration catalyst based on the selective catalytic reduction (SCR) technique, and a production method thereof. After a drying monomer with the catalyst composition is sawed, the catalyst is prepared through the following steps: (1) one end part of the monomer is put in an aluminum salt water solution with the density being 1.41-1.45kg/L for being impregnated about 5-12 seconds; (2) a blower is used to blow for 15-25 seconds, so as to blow off superfluous hardening liquid on the surface of the impregnated end part of the monomer; and (3) the monomer after being impregnated in the hardening liquid is calcined in a calciner and hardened. Therefore, the production process of the invention is simple and costs little, and the abrasion strength of the catalyst improved.

Description

technical field [0001] The selective catalytic reduction flue gas denitrification catalyst and its manufacturing method relate to waste gas (i.e. flue gas) with high dust content such as coal-fired boiler waste gas in power plants, cement plant kiln waste gas, waste incinerator waste gas, etc., based on selective catalytic reduction ( A honeycomb denitration catalyst of SCR) technology, and its manufacture method. Background technique [0002] At present, selective catalytic reduction (SCR) technology is the most successful and widely used technology for NOx in flue gas produced by coal-fired boilers in power plants, cement plant kilns, waste incinerators, etc. Among them, the denitration catalyst is the core and key part of the implementation of this technology, and the honeycomb denitration catalyst is one of the most mainstream product forms of the denitration catalyst. [0003] The substrate of honeycomb denitration catalyst is TiO 2 (titanium dioxide), the active ingr...

AI Technical Summary

Problems solved by technology

The catalyst prepared by this method has improved the wear strength of the catalyst end face, and achieved good results, but it also has the following defects to be overcome: 1. The method needs to soak the end face of the catalyst structure once before and after drying. , and then roast and harden. If the end face of the catalyst structure is not soaked after drying, the end face of the catalyst will have a wear depth of 1mm during use, so the manufacturing process is complicated; 2. Ammonium metatungstate and ammonium metavanadate used for soaking The solution is expensive, and the cost of the catalyst produced is relatively high; 3. In order to obtain the ideal wear strength, due to the limitation of the characteristics of ammonium metatungstate and ammonium metavanadate solution, it is necessary to use an electric furnace or blow hot air when drying the catalyst structure. Drying, and the drying time is long, also leads to complicated manufacturing process and increased production cost