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Selective catalytic reduction flue gas denitration catalyst and production method thereof

A technology for denitrification catalyst and manufacturing method, which is applied in the field of selective catalytic reduction flue gas denitrification catalyst and manufacturing, can solve the problems of increased production cost, high catalyst cost, complicated manufacturing process, etc., and achieve saving of production cost, short drying time, wear and tear The effect of increasing strength

Active Publication Date: 2009-05-13
CHENGDU DONGFANG KWH ENVIRONMENTAL PROTECTION CATALYSTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] will already contain the catalyst component (TiO 2 , V 2 o 5 、WO 3 ) dry monomer (the dry monomer will contain the catalyst component (TiO 2 , V 2 o 5 、WO 3 ) and liquid substances are extruded into honeycomb monomers and fully dried at 115°C. The manufacturing method is the prior art. ) after sawing and cutting into a specified length (according to the different requirements of flue gas conditions of different denitrification projects, generally 600-1300mm), the catalyst is manufactured according to the following steps:

[0022] (1) Dip 20--30 mm of one end of the monomer in aluminum dihydrogen phosphate hardening solution with a density of 1.43 kg / L for 7 seconds;

[0023] (2) Take out the monomer and let stand for 8 seconds;

[0024] (3) Use a compressed air blower to blow air for 20 seconds to blow off the excess hardening liquid on the surface of the monomer impregnated end;

[0025] (4) Place the monomer impregnated in the hardening solution in a calciner...

Embodiment 2

[0027] The density of the hardening solution was adjusted to 1.45kg / L, and other conditions and hardening treatment were the same as in Example 1 to prepare a catalyst.

Embodiment 3

[0029] The density of the hardening solution was adjusted to 1.42kg / L, and other conditions and hardening treatment were the same as in Example 1 to prepare a catalyst.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J33/00B01J23/16
Inventor 冷洪川艾生炳
Owner CHENGDU DONGFANG KWH ENVIRONMENTAL PROTECTION CATALYSTS
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