Monolithic cellular catalyst for SCR smoke denitration and preparation technology thereof

A honeycomb catalyst and integral technology, which is applied in the field of integral honeycomb catalyst preparation, can solve the problems of increasing catalyst production cost, high temperature and humidity requirements, easy cracking in drying molding, etc., to increase mechanical strength and yield, and increase electrostatic dispersion capacity , Reduce the effect of drying molding conditions

Active Publication Date: 2012-03-21
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of water added can reach up to 100%. If the amount of water added is too high, the subsequent drying and molding will be easily cracked. The temperature and humidity requirements during curing are high, and the low yield will greatly increase the production cost of the catalyst.

Method used

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  • Monolithic cellular catalyst for SCR smoke denitration and preparation technology thereof
  • Monolithic cellular catalyst for SCR smoke denitration and preparation technology thereof
  • Monolithic cellular catalyst for SCR smoke denitration and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of monolithic honeycomb catalyst for SCR flue gas denitrification

[0035] (1) Dry mix. Take 750g of nano anatase TiO 2 Powder, 20gV 2 o 5, 140gWO 3 , 50gMoO 3 , 30gZrO 2 , 10gMnO 2 . On this basis, the solid additives were 3g NSF, 112.5g polyacrylamide, 75g activated carbon powder, and 112.5g glass fiber. Put various solids together in a dry powder mixer and mix for 15 minutes.

[0036] (2) Kneading. Add 300ml of water and 112.5ml of monoethanolamine into the above mixture, and start the kneading process for 30 minutes.

[0037] (3) Practicing mud. The kneaded plastic material is transferred to a vacuum mud mixer to remove excess moisture and gas in the material.

[0038] (4) extrusion molding. The dense and uniform mud segment obtained after mud refining enters the extruder, and is extruded through a honeycomb steel die to obtain a catalyst green body.

[0039] (5) drying and roasting. Dry at 80°C for 12 hours, then raise the temperature ...

Embodiment 2

[0045] 1. Preparation of monolithic honeycomb catalyst for SCR flue gas denitrification

[0046] (1) Dry mix. Take 800g of nano anatase TiO 2 Powder, 100gWO 3 , 20gMoO 3 , 30gZrO 2 , 50gMnO 2 . On this basis, the solid additives were 3.2g PC-S, 80g carboxymethyl cellulose, 40g activated carbon powder, and 80g glass fiber. Put various solids together in a dry powder mixer and mix for 15 minutes.

[0047] (2) Kneading. Add 280ml of water and 120ml of monoethanolamine into the above mixture, and start the kneading process for 30 minutes.

[0048] (3) Practicing mud. The kneaded plastic material is transferred to a vacuum mud mixer to remove excess moisture and gas in the material.

[0049] (4) extrusion molding. The dense and uniform mud segment obtained after mud refining enters the extruder, and is extruded through a honeycomb steel die to obtain a catalyst green body.

[0050] (5) drying and roasting. Dry at 60°C for 16 hours, then raise the temperature to 110°C a...

Embodiment 3

[0056] 1. Preparation of monolithic honeycomb catalyst for SCR flue gas denitrification

[0057] (1) Dry mix. Take 800g of nano anatase TiO 2 Powder, 100gWO 3 , 20gMoO 3 , 30gZrO 2 , 50gMnO 2 . On this basis, the solid additives added are 5.6g PC-ZH, 80g carboxymethyl cellulose, 40g activated carbon powder, and 120g glass fiber. Put various solids together in a dry powder mixer and mix for 15 minutes.

[0058] (2) Kneading. Add 200ml of water and 80ml of monoethanolamine into the above mixture, and start the kneading process for 30 minutes.

[0059] (3) Practicing mud. The kneaded plastic material is transferred to a vacuum mud mixer to remove excess moisture and gas in the material.

[0060] (4) extrusion molding. The dense and uniform mud segment obtained after mud refining enters the extruder, and is extruded through a honeycomb steel die to obtain a catalyst green body.

[0061] (5) drying and roasting. Dry at 60°C for 16 hours, then raise the temperature to 1...

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Abstract

The invention discloses a monolithic cellular catalyst for SCR smoke denitration, which adopts TiO2 powder as a substrate. The catalyst is added with active ingredients and additive at the same time. The active ingredients comprise TiO2, WO3, MoO3, V2O5, ZrO2 and MnO2. The additive comprises water reducer, binder, pore-forming agent, extrusion assistant and glass fiber. The invention further discloses a preparation technology for the monolithic cellular catalyst for SCR smoke denitration, comprising the following steps: dry mixing, kneading and pugging to obtain a mud section with good plasticity and a compact structure; extruding to obtain the blank of the monolithic cellular catalyst; drying and baking to obtain the monolithic cellular catalyst for SCR smoke denitration. The invention has simple preparation technology, greatly reduces the water quantity during the kneading process through adding the water reducer which is adopted as one active ingredient, reduces the maintaining conditions of the catalyst after being formed, and improves the strength, abrasion resistance and yield for forming the catalyst.

Description

technical field [0001] The invention relates to a preparation technology of an integral honeycomb catalyst, in particular to a preparation process of an integral selective catalytic reduction honeycomb catalyst for SCR flue gas denitrification. Background technique [0002] my country is the world's largest coal producer and consumer. Coal still accounts for a large proportion of my country's energy structure. The coal-based energy consumption structure is the most important reason for my country's increasingly serious nitrogen oxide pollution. For many years, coal has accounted for more than 75% of my country's total primary energy consumption. It is estimated that coal will still account for about 70% of total energy consumption in the next 10 years. And the consumption pattern will not change. Among them, there are more than 500,000 coal-fired industrial boilers in the iron and steel, nonferrous metallurgy, chemical industry, building materials and other industries. The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/56
Inventor 王岳军刘伟莫建松吴忠标
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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