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Preparation method of denitration catalyst for glass kiln flue gas

A denitrification catalyst and glass kiln technology, applied in the field of flue gas denitrification treatment, can solve the problems of catalyst denitrification activity poisoning, reduce catalyst service life, etc., achieve the effect of improving low temperature denitrification activity, enhancing redox performance, and high purity

Inactive Publication Date: 2020-04-17
JIANGXI SHINCO ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alkali-containing ash combines with the moisture in the flue gas during the cooling process, sticks into agglomerates, and adheres to the surface of the catalyst, which has a serious poisoning effect on the denitrification activity of the catalyst and greatly reduces the service life of the catalyst.

Method used

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  • Preparation method of denitration catalyst for glass kiln flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) In the reaction kettle, add a certain amount of 4.05kg oxalic acid and 270kg deionized water and heat to 90°C, add 0.64kg ammonium metavanadate, 7.36kg ammonium heptamolybdate, 3kg cerous nitrate and 0.5kg cobalt nitrate , stirred for a certain period of time to achieve full dissolution, and then 90kg TiO 2 10kg of expanded vermiculite was added to the mixed solution, and the temperature was raised to 180°C for 8 hours. The slurry-like material after the hydrothermal reaction was dried at 105° C. for 8 hours, and ground to obtain catalyst precursor powder.

[0021] (2) Weigh 100kg of catalyst precursor powder prepared in the above step (1), 1.2kg of carboxymethyl cellulose, 0.5kg of polyethylene oxide, 7kg of chopped basalt fiber, 3kg of ammonia water, 8kg of pulp cotton, and 0.8kg of stearic acid , adding 30kg of deionized water, after mud refining, vacuuming, aging under constant temperature and humidity conditions for 24 hours, forming, drying at 60°C for 48-72 ...

Embodiment 2

[0023] (1) In the reaction kettle, add a certain amount of 4.05kg oxalic acid and 270kg deionized water and heat to 100°C, add 0.64kg ammonium metavanadate, 7.36kg ammonium heptamolybdate, 3kg cerous nitrate and 0.5kg cobalt nitrate , stirred for a certain period of time to achieve full dissolution, and then 90kgTiO 2 10kg of expanded vermiculite was added to the mixed solution, and the temperature was raised to 200°C for 8 hours. The slurry-like material after the hydrothermal reaction was dried at 115° C. for 8 hours, and ground to obtain catalyst precursor powder.

[0024] (2) Weigh 100kg of catalyst precursor powder prepared in the above step (1), 1.2kg of carboxymethyl cellulose, 0.5kg of polyethylene oxide, 7kg of chopped basalt fiber, 3kg of ammonia water, 8kg of pulp cotton, and 0.8kg of stearic acid , adding 30kg of deionized water, after mud refining, vacuuming, aging under constant temperature and humidity conditions for 24 hours, forming, drying at 60°C for 48-72 ...

Embodiment 3

[0026] (1) In the reaction kettle, add a certain amount of 4.05kg oxalic acid and 270kg deionized water and heat to 120°C, add 0.64kg ammonium metavanadate, 7.36kg ammonium heptamolybdate, 3kg cerous nitrate and 0.5kg cobalt nitrate , stirred for a certain period of time to achieve full dissolution, and then 90kgTiO 2 10kg of expanded vermiculite was added to the mixed solution, and the temperature was raised to 220°C for 8 hours. The slurry-like material after the hydrothermal reaction was dried at 120° C. for 8 hours, and ground to obtain catalyst precursor powder.

[0027] (2) Weigh 100kg of catalyst precursor powder prepared in the above step (1), 1.2kg of carboxymethyl cellulose, 0.5kg of polyethylene oxide, 7kg of chopped basalt fiber, 3kg of ammonia water, 8kg of pulp cotton, and 0.8kg of stearic acid , adding 30kg of deionized water, after mud refining, vacuuming, aging under constant temperature and humidity conditions for 24 hours, forming, drying at 60°C for 48-72 ...

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Abstract

The invention discloses a preparation method of a denitration catalyst for a glass kiln. The preparation method specifically comprises the following steps: 1) adding oxalic acid, deionized water, ammonium metavanadate, ammonium heptamolybdate, cerous nitrate and cobalt nitrate into a reaction kettle, stirring until the materials are fully dissolved, then adding TiO2 and expanded vermiculite into amixed solution, carrying out hydrothermal reaction, drying and grinding to obtain catalyst precursor powder; 2) weighing the precursor powder, carboxymethyl cellulose, polyoxyethylene, basalt fiber,ammonia water, pulp cotton and stearic acid, adding deionized water, and performing pugging, aging and sintering to obtain the denitration catalyst for the glass kiln. The denitration catalyst provided by the invention has high wear resistance and alkali metal toxicity resistance, so that the denitration catalyst adapts to flue gas conditions of a glass kiln and achieves an optimal denitration effect.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitration treatment, and relates to a preparation method of a denitration catalyst for a glass kiln. Background technique [0002] Nitrogen oxides are one of the main air pollutants and the main cause of acid rain and photochemical smog. my country's annual emission of nitrogen oxides has reached more than 27 million tons, surpassing the United States to become the world's largest nitrogen oxide emitter. The pollution control of nitrogen oxides has become the focus of attention. [0003] Selective catalytic reduction of ammonia (NH 3 -SCR) is the immobilized source of NO x The main source of removal technology, the core of which is the SCR denitrification catalyst. At present, commercial SCR denitration catalysts mainly include V 2 o 5 -WO 3 / TiO 2 and V 2 o 5 -MoO 3 / TiO 2 catalyst. Among them, the active species V 2 o 5 A monodisperse substance is formed on the surface of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887B01D53/86B01D53/56
CPCB01D53/8628B01D2251/2062B01D2258/0283B01J23/002B01J23/8877B01J2523/00B01J2523/3712B01J2523/47B01J2523/55B01J2523/68B01J2523/845
Inventor 朱江朱立全王献忠陈琛吴彥霞
Owner JIANGXI SHINCO ENVIRONMENTAL PROTECTION CO LTD
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