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Production method of honeycomb denitration catalyst carrier material with more than 40 holes

A technology of denitration catalyst and carrier material, which is applied in the production field of honeycomb denitration catalyst carrier material for fuel and gas with more than 40 holes, can solve the problems such as the strength and wear resistance can not meet the requirements, the catalyst qualification rate is low, and achieve high strength. Effect

Active Publication Date: 2020-10-16
安徽迪诺环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the strength and wear resistance of the support material of the existing honeycomb denitrification catalyst for fuel and gas with more than 40 holes cannot meet the requirements, and the pass rate of the catalyst in molding and calcination is very low. Therefore, a kind of Production method of honeycomb denitrification catalyst carrier material with more than 40 holes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: The production method of the honeycomb denitration catalyst carrier material with more than 40 holes, which includes the following steps; (1), hydrolyzed metatitanic acid is washed twice with desalted water, and the content of iron, potassium, and sodium elements is reduced to below 100PPm; (2) Add ammonium paratungstate with a weight ratio of 5.8wt% of hydrolyzed metatitanic acid and stir for 0.3h, then add nano-scale silica with a weight ratio of 1.0wt% of hydrolyzed metatitanic acid and stir for 0.8h, while heating to 45°C , then add vanadium pentoxide accounting for 0.8wt% by weight of hydrolyzed metatitanic acid, and stir for 0.3h to form a slurry; (3) Press the slurry to a cake shape with a water content of 45wt% or less with a diaphragm press frame Materials; (4) Heat the cake-like material to 250°C through special flash evaporation equipment, high-speed rotary flash dehydration for 20 minutes, and the moisture content of the cake-like material is re...

Embodiment 2

[0011] Embodiment 2: The production method of the honeycomb denitration catalyst carrier material with more than 40 holes, which includes the following steps; (1), hydrolyzed metatitanic acid is washed twice with desalted water, and the content of iron, potassium, and sodium elements is reduced to below 100PPm; (2) Add ammonium paratungstate with a weight ratio of 6wt% of hydrolyzed metatitanic acid and stir for 0.5h, then add nano-scale silica with a weight ratio of 1.2wt% of hydrolyzed metatitanic acid and stir for 1h, while heating to 50°C, and then Add vanadium pentoxide accounting for 1wt% of hydrolyzed metatitanic acid, and stir for 0.5h to form a slurry; (3), press the slurry to a cake-like material with a water content of 45wt% or less with a diaphragm press frame; ( 4) Heat the cake-shaped material to 280°C through a special flash evaporation equipment, and dehydrate it by high-speed rotary flash evaporation for 20 minutes, and the water content of the cake-shaped mate...

Embodiment 3

[0012] Embodiment 3: The production method of the honeycomb denitration catalyst support material with more than 40 holes, which includes the following steps; (1), hydrolyzed metatitanic acid is washed twice with desalted water, and the content of iron, potassium, and sodium elements is reduced to below 100PPm; (2) Add ammonium paratungstate with a weight ratio of 6.2wt% of hydrolyzed metatitanic acid and stir for 0.7h, then add nano-scale silica with a weight ratio of 1.5wt% of hydrolyzed metatitanic acid and stir for 1.2h, while heating to 55°C , then add vanadium pentoxide with a weight ratio of 1.2wt% of hydrolyzed metatitanic acid, and stir for 0.7h to form a slurry; (3) Press the slurry to a cake shape with a water content of 45wt% or less with a diaphragm press frame Materials; (4) Heat the cake-shaped material to 300°C through a special flash evaporation equipment, and dehydrate it by high-speed rotary flash for 20 minutes, and the water content of the cake-shaped mater...

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Abstract

The invention discloses a production method of honeycomb denitration catalyst carrier material with more than 40 holes, which includes the following steps: (1) hydrolyzing metatitanic acid and washing it with desalted water twice; (2) adding ammonium paratungstate and stirring for 0.3-0.7h, and then adding Stir the nanoscale silica for 0.8-1.2h and heat to 45-55℃ at the same time, then add vanadium pentoxide and stir for 0.3-0.7h to form a slurry; (3) Use a diaphragm press plate and frame to press the slurry to Cake-shaped material with a moisture content of less than 45wt%; (4), the moisture content of the cake-shaped material is reduced to less than 1wt%; (5), the cake-shaped material is heated to 450~480℃ through the roasting kiln, and the roasting time is 2~2.5h. The beneficial effect of the present invention is that the denitrification efficiency of the honeycomb denitrification catalyst produced with more than 40 holes can reach more than 97%.

Description

technical field [0001] The invention relates to the technical field of denitration catalysts, in particular to a production method of a special honeycomb denitration catalyst carrier material for fuel gas with more than 40 holes. Background technique [0002] Nitrogen oxides NOx is one of the main air pollution, NOx includes NO, NO 2 , N 2 O, N 2 o 3 , and N 2 o 4 etc., mainly NO and NO 2 form exists. Coal-fired power plants are the main source of NOx emissions, and nearly 70% of my country's nitrogen oxides NOx emissions come from coal combustion. The emission of nitrogen oxides will cause environmental problems such as acid rain, greenhouse effect and ozone layer destruction, seriously endangering human health and social development. At present, the world's industrial application of denitrification technology is mainly divided into low NOx combustion technology, SNCR technology and SCR technology. Selective catalytic reduction (SCR) denitrification technology has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J35/04B01J35/10B01D53/86B01D53/56
CPCB01D53/8628B01J23/002B01J23/30B01D2258/0283B01J2523/00B01J35/56B01J35/40B01J35/613B01J35/615B01J2523/41B01J2523/47B01J2523/55B01J2523/69
Inventor 荚玉冬
Owner 安徽迪诺环保新材料科技有限公司