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Preparation method of denitrification ceramic catalyst carrier

A ceramic catalyst and carrier technology, applied in the field of preparation of denitrification ceramic catalyst carrier, can solve the problems of reducing one drying process, low NOx removal rate, uneven loading, etc., achieve good economic and environmental benefits, and ensure activity uniformity , the effect of increasing the scale of production

Active Publication Date: 2014-10-29
GUANGXI MEIZHIFENG TECH
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  • 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 320 r / min after mixing evenly; add 6 kg of tungsten trioxide after 0.5 hours, and continue to beat at a speed of 320 r / min 0.5 hours; then use a plate and frame filter press to dehydrate the obtained slurry for 1 hour at a pressure of 0.48MPa and a temperature of 40°C; and finally vacuum dry the obtained material after dehydration in an environment with a relative humidity of 5%. After 2 hours, the drying temperature is 70° C. to obtain the denitration ceramic catalyst carrier.

Embodiment 2

[0025] 100 kg of anatase TiO 2 1. Add 200 kg of clay to the beater for dry mixing, and then add 90 kg of deionized water to beat at a speed of 330 r / min after mixing evenly; add 7 kg of tungsten trioxide after 1 hour, and continue to beat at a speed of 330 r / min 1 hour; then the obtained slurry was 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 dehydrated material was vacuum-dried in an environment with a relative humidity of 6%. After 2.5 hours, 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 to beat at a speed of 340 r / min; add 8 kg of tungsten trioxide after 0.5 hours, and continue to beat at a speed of 340 r / min 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 dehydrated material was vacuum-dried for 3 hours in an environment with a relative humidity of 7% , and the drying temperature is 65° C. to obtain the denitration ceramic catalyst carrier.

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Abstract

The invention discloses a preparation method of a denitrification ceramic catalyst carrier. In the preparation method, a wet mixing method is adopted in the process of preparing a WO3 / TiO2 selective reduction extraction agent carrier for NOx removal; specifically, the method comprises the following steps: beating clay, a hydrate nano TiO2 raw material and deionized water in a beating tank; adding tungsten trioxide for metal doping; dehydrating with a plate-and-frame filter press, wherein generated plate-and-frame filtrate is pumped back to the beating tank by a pump for recycling; and finally, performing low-temperature vacuum drying in a vacuum dryer. The method disclosed by the invention has the advantages of being reasonable, simple in process and equipment, low in cost, large in treatment capacity and the like; the WO3 loading activity in the obtained product carrier is uniform, and the high removal rate of NOx in flue gas is guaranteed.

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 Applications(China)
IPC IPC(8): B01J23/30B01J32/00B01D53/86B01D53/56
Inventor 罗玉宏
Owner GUANGXI MEIZHIFENG TECH
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