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Denitration catalyst and production process thereof

A denitrification catalyst and lubricant technology, applied in the field of denitrification catalysts, can solve the problems of reduced catalyst service life, reduced catalyst structural stability, and increased catalyst damage, achieving the effects of improved stability, improved plasticity, and reduced damage

Active Publication Date: 2021-10-19
SHANDONG BOLIN ENVIRONMENTAL PROTECTION TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned related technologies, the inventor believes that in order to improve the activity and denitrification efficiency of the denitration catalyst, the method of increasing the number of catalyst pores is usually adopted, thereby increasing the specific surface area. When the number of catalyst pores increases to 40 pores, the structural stability of the catalyst decreases, and the upper end of the catalyst After being damaged by flue gas erosion, the flue gas continues to erode the catalyst, which increases the damage of the catalyst and reduces the service life of the catalyst.

Method used

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  • Denitration catalyst and production process thereof
  • Denitration catalyst and production process thereof
  • Denitration catalyst and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] S1. Mixing: Take 2kg of monoethanolamine and 270kg of deionized water and mix to obtain monoethanolamine aqueous solution, pour 580kg of titanium dioxide, 1kg of ammonium metavanadate and 2kg of ammonium metatungstate into the kneader, add 272kg of monoethanolamine aqueous solution, and then Add 2kg denitration catalyst fiber, 4kg polyethylene oxide, 15kg glass fiber, 3kg methyl silicone resin, 1kg ceramic fiber powder, 4kg lactic acid, 4kg carboxymethyl cellulose and 10kg kaolin, kneader speed is 35rpm, and stir for 30min to prepare Mixture;

[0072] S2, stale: take the mixture out of the kneader, put it in a sealed plastic box and let it age for 24 hours;

[0073] S3. Extrusion: the stale mixture is extruded into a 40-hole honeycomb billet through an extruder, the absolute vacuum is 93kPa, the extrusion pressure is 3MPa, and the extrusion speed is 900mm / min;

[0074] S4. Drying: the honeycomb billet is dried in two stages,

[0075] Carry out the first stage of dryin...

Embodiment 2

[0084] The difference from Example 1 is that

[0085] S1 mixing is: take 5kg of monoethanolamine and 300kg of deionized water and mix to obtain monoethanolamine aqueous solution, pour 600kg of titanium dioxide, 2.5kg of ammonium metavanadate and 3.5kg of ammonium metatungstate into the kneader, add 305kg of monoethanolamine aqueous solution , then add 3.5kg denitration catalyst fiber, 6kg polyethylene oxide, 22.1kg glass fiber, 4.4kg methyl silicone resin, 1.5kg ceramic fiber powder, 6kg lactic acid, 6kg carboxymethyl cellulose and 20kg kaolin, the kneader speed is 35rpm , after stirring for 30min, the mixture was prepared.

Embodiment 3

[0087] The difference from Example 1 is that

[0088] S1 mixing is: take 5kg of monoethanolamine and 300kg of deionized water and mix to obtain monoethanolamine aqueous solution, pour 600kg of titanium dioxide, 2.5kg of ammonium metavanadate and 3.5kg of ammonium metatungstate into the kneader, add 305kg of monoethanolamine aqueous solution , then add 3.5kg denitrification catalyst fiber, 6kg polyethylene oxide, 20kg glass fiber, 5kg methyl silicone resin, 3kg ceramic fiber powder, 6kg lactic acid, 6kg carboxymethyl cellulose and 20kg kaolin, the kneader speed is 35rpm, stir for 30min Then make the mixture.

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Abstract

The invention relates to the field of denitration catalysts, and particularly discloses a denitration catalyst and a production process thereof. The denitration catalyst is prepared from the following raw materials: titanium dioxide, ammonium metavanadate, ammonium metatungstate, an aqueous monoethanolamine solution, denitration catalyst fibers, polyoxyethylene, a lubricant, a plasticizer and a flexibilizer, wherein the flexibilizer comprises glass fibers, methyl silicone resin and ceramic fiber powder. The production process comprises the following steps: mixing, aging, extruding, drying, roasting and cutting. The denitration catalyst can be used for reduction treatment of nitrogen oxides in flue gas, and has the advantages of capability of reducing erosion damage of the flue gas to the denitration catalyst and prolonged service life.

Description

technical field [0001] This application relates to the field of denitration catalysts, more specifically, it relates to a denitration catalyst and its production process. Background technique [0002] The denitrification catalyst generally refers to the catalyst used in the SCR denitrification system. In the SCR reaction, the denitrification catalyst promotes the chemical reaction between the reducing agent and the nitrogen oxides in the flue gas selectively at a certain temperature, so as to achieve the denitrification treatment of the flue gas. the goal of. [0003] In the related art, the Chinese invention patent application with the publication number CN110639504A discloses a honeycomb low-temperature flue gas denitrification catalyst and its preparation method, which contains the following components by weight: 380-630 parts of titanium dioxide, 1-2 parts of eighteen Stearic acid, 5-8 parts of lactic acid, 12-16 parts of ammonium metatungstate, 8-12 parts of ammonium h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J35/04B01J37/00B01D53/86B01D53/56
CPCB01J37/0009B01J23/30B01D53/8628B01J35/56
Inventor 吴光勇陈爱会赵福民李启江
Owner SHANDONG BOLIN ENVIRONMENTAL PROTECTION TECH DEV