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Low-temperature SCR catalytic module and preparation method and application thereof

An SCR catalyst and low-temperature technology, which is applied in the field of low-temperature SCR catalytic modules and its preparation, can solve problems such as high solid content of slurry, easy cracking of coating, and reduced yield, and achieve simplified process steps, large reaction surface, and improved yield. Effect

Inactive Publication Date: 2020-11-03
QINGDAO HSJ ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its existence requires multiple coatings, high cost, low efficiency, time-consuming, and reduced yield
In addition, the solid content of the slurry is high during subsequent coating, which is easy to block holes, and the coating is easy to crack and fall off

Method used

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  • Low-temperature SCR catalytic module and preparation method and application thereof
  • Low-temperature SCR catalytic module and preparation method and application thereof
  • Low-temperature SCR catalytic module and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Preparation of catalyst carrier

[0033] S11. Add 10.4kg vanadyl oxalate to 289kg deionized water, then add 6.6kg ammonium molybdate, 54kg silica sol, stir and mix evenly, add 90kg TiO 2 , sonicate for 2 hours under stirring conditions, and prepare a low-temperature SCR catalyst active slurry with a solid content of 20%; when the corrugated refractory fiber paper sheet is bonded to the flat glass fiber paper substrate, the low-temperature SCR catalyst active slurry is evenly sprayed, dried and collected. volume ready for use;

[0034] S12. Laying and cutting the refractory fiber paper into 500mm*500mm*500mm cubes and placing them in the mould;

[0035] S13, immersing the carrier obtained in S12 in 20% low-temperature SCR catalyst active slurry for 5 minutes, vacuum purging, microwave drying at 80°C, and roasting in air at 450°C for 3 hours;

[0036] 2. Catalytic module coating

[0037] S21. Add 5.2kg of vanadyl oxalate to 167kg of deionized water, then add 3.3kg o...

Embodiment 2

[0046] 1. Preparation of catalyst carrier

[0047] S11. Add 10.4kg vanadyl oxalate to 439kg deionized water, then add 6.6kg ammonium molybdate, 54kg silica sol, stir and mix evenly, add 90kg TiO 2, under stirring conditions, ultrasonic 2h, the preparation of low-temperature SCR catalyst active slurry with a solid content of 15%; when the corrugated refractory fiber paper sheet is bonded to the flat glass fiber paper backing, the low-temperature SCR catalyst active slurry is evenly sprayed, dried and rolled stand-by;

[0048] S12. Laying and cutting the refractory fiber paper into 500mm*500mm*500mm cubes and placing them in the mould;

[0049] S13, immersing the carrier obtained in S12 in 15% low-temperature SCR catalyst active slurry for 5 minutes, vacuum purging, microwave drying at 100°C, and roasting in air at 400°C for 4 hours;

[0050] 2. Catalytic module coating

[0051] S21. Add 5.2kg vanadyl oxalate to 167kg deionized water, then add 4.9kg ammonium molybdate, 18kg s...

Embodiment 3

[0057] 1. Preparation of catalyst carrier

[0058] S11. Add 5.2kg of vanadyl oxalate to 820kg of deionized water, then add 3.3kg of ammonium molybdate and 27kg of silica sol, stir and mix evenly, add 45kg of TiO 2 , under stirring conditions, ultrasonic 2h, prepared low-temperature SCR catalyst active slurry with a solid content of 5%; when the corrugated refractory fiber paper sheet is bonded to the flat glass fiber paper backing, evenly spray the low-temperature SCR catalyst active slurry, dry and rewind stand-by;

[0059] S12. Laying and cutting the refractory fiber paper into 500mm*500mm*500mm cubes and placing them in the mould;

[0060] S13. Add 5.2kg vanadyl oxalate to 370kg deionized water, then add 3.3kg ammonium molybdate, 27kg silica sol, stir and mix evenly, add 45kg TiO 2 10% low-temperature SCR catalyst active slurry was obtained by ultrasonication for 2 hours under stirring conditions, and the carrier obtained in S12 was immersed in the 10% low-temperature SCR...

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Abstract

The invention relates to the technical field of air pollution control and environmental catalytic materials, in particular to a low-temperature SCR catalytic module and a preparation method and application thereof, wherein the obtained SCR catalytic module is mainly used for removing and purifying NOx in low-temperature flue gas. The preparation method of the low-temperature SCR catalytic module can reduce the coating frequency of the catalytic module, so that energy consumption is reduced, and the product performance is improved. In the forming process of the corrugated refractory fiber papersheet and the planar refractory fiber paper bottom lining, the low-temperature SCR catalyst active slurry is optimally used for the inorganic strength enhancer, the reinforced refractory fiber papersheet is processed into a carrier with a fixed size, and the carrier is bonded by utilizing the low-temperature SCR catalyst active slurry, so that the strength of the refractory fiber paper sheet isimproved. The roasted carrier module pre-coated with the catalyst is further coated with the catalyst, wherein the coating amount of the catalyst is increased; meanwhile, the catalyst is used for filling, so that the effect between the refractory fiber and the catalyst coating is enhanced.

Description

technical field [0001] The invention relates to the technical field of air pollution control and environmental catalytic materials, in particular to a low-temperature SCR catalytic module and its preparation method and application. Background technique [0002] NOx is one of the main air pollutants currently under control, which brings great harm to human health, ecological environment, air quality, etc. . Therefore, NOx emission control is the main task of current air pollution control. The work report of the first meeting of the 13th National People's Congress pointed out that it is necessary to promote pollution prevention and control to achieve greater results, consolidate the results of the blue sky defense war, and promote the ultra-low emission transformation of steel and other industries. [0003] Improve pollution discharge standards and implement a deadline to meet the standards. Environmental protection facilities in the iron and steel industry require room for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/56
CPCB01D53/8628B01D2251/2062B01D2258/0283
Inventor 展宗城展飞梁鹏杨艳林李晨灿郅立鹏郭聪陈继朝
Owner QINGDAO HSJ ENVIRONMENTAL PROTECTION TECH CO LTD
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