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Preparation method of denitrification ceramic catalyst carrier

A technology of ceramic catalyst and carrier, which is applied in the field of preparation of ceramic catalyst carrier for denitrification, can solve the problems of reducing one drying process, uneven load, low NOx removal rate, etc., achieve good economic and environmental benefits, and increase production scale , The effect of ensuring the uniformity of activity

Active Publication Date: 2016-04-27
GUANGXI MEIZHIFENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the impregnation method, the preparation of the dry blending method is simpler, reducing one drying process, and relying on strict ingredients, the loading of vanadium can be well controlled, but generally it is necessary to add a binder, which is prone to uneven loading. NO in flue gas x The removal rate is not high

Method used

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  • Preparation method of denitrification ceramic catalyst carrier
  • Preparation method of denitrification ceramic catalyst carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 100 kg of anatase TiO 2 1. Add 200 kg of clay to the beater for dry mixing, and then add 75 kg of deionized water to beat at a speed of 320r / min after mixing evenly; add 6 kg of tungsten trioxide after 0.5 hours, and continue to beat at a speed of 320r / min for 0.5 hours ; Then the obtained slurry is dehydrated for 1 hour at a pressure of 0.48MPa and a temperature of 40°C with a plate and frame filter press; the material obtained after the final dehydration is vacuum-dried for 2 hours under an environment with a relative humidity of 5% , and the drying temperature is 70° C. to obtain the denitration ceramic catalyst carrier.

Embodiment 2

[0025] 100 kg of anatase TiO 2 , Add 200 kg of clay to the beater for dry mixing, then add 90 kg of deionized water to beat at a speed of 330r / min after mixing evenly; add 7 kg of tungsten trioxide after 1 hour, and continue to beat at a speed of 330r / min for 1 hour Then the obtained slurry is dehydrated with a plate and frame filter press at a pressure of 0.44MPa and a temperature of 45°C for 1 hour; finally, the material obtained after dehydration is vacuum-dried for 2.5 hours under an environment with a relative humidity of 6%. , and the drying temperature is 70° C. to obtain the denitration ceramic catalyst carrier.

Embodiment 3

[0027] 100 kg of anatase TiO 2 1. Add 150 kg of clay to the beater for dry mixing. After mixing evenly, add 87.5 kg of deionized water for beating at a speed of 340r / min; add 8 kg of tungsten trioxide after 0.5 hours, and continue beating at a speed of 340r / min for 1 hour Then the obtained slurry was dehydrated with a plate and frame filter press at a pressure of 0.36MPa and 50°C for 1.5 hours; finally, the material obtained after dehydration was vacuum-dried for 3 hours under an environment with a relative humidity of 7%, and dried The temperature is 65° C. to obtain the denitration ceramic catalyst carrier.

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Abstract

The invention discloses a method for preparing a denitrification ceramic catalyst carrier. The present invention is used in the preparation of NO x The removed WO3 / TiO2 selective reduction extraction agent carrier process adopts a wet mixing method, specifically, including firstly putting clay, hydrated nano-TiO2 raw materials and deionized water into the beating tank for beating, and then adding tungsten trioxide for Metal doping, and then use plate and frame filter press for dehydration, in which the frame plate filtrate produced is pumped back to the beating tank for recycling, and finally vacuum dried at low temperature in a vacuum dryer. The invention has the advantages of reasonable method, simple process and equipment, low cost, large processing capacity, etc., and the activity of WO3 loaded in the obtained product carrier is uniform, ensuring that NO in the flue gas x high removal rate.

Description

technical field [0001] The invention belongs to the technical field of selective catalytic reduction method catalysts, and in particular relates to a preparation method of a denitrification ceramic catalyst carrier. Background technique [0002] Nitrogen oxide NO x It is one of the main sources of air pollution, and it has attracted more and more attention. Nitrogen oxides in the atmosphere can form nitric acid and nitrate fine particles mixed with sulfuric acid and sulfate fine particles, accelerating the deterioration of acid rain. In recent years, PM2.5 has frequently appeared in many first-tier cities, and NOx emissions are an important source of PM2.5. More than 90% of nitrogen oxides in my country's air pollutants come from the combustion of fossil fuels (such as coal, oil, natural gas, etc.). With the rapid growth of energy consumption, my country's nitrogen oxide emissions have risen rapidly. Statistics show that in 2005, the national NO x The total emissions ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J32/00B01D53/86B01D53/56
Inventor 罗玉宏
Owner GUANGXI MEIZHIFENG TECH
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