Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Titanium-based catalyst for flue gas denitration of sintering machine and pellet and preparation method thereof

A catalyst and pellet technology, applied in sintering machine, titanium-based catalyst for pellet flue gas denitration and its preparation field, can solve SO2 poisoning, sintering, unsuitable low temperature flue gas denitration of pellets, flue gas denitration treatment The technology is not mature enough to achieve the effect of strong resistance to metal poisoning, green environmental protection, and excellent catalytic performance.

Inactive Publication Date: 2017-05-31
内蒙古华元科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flue gas denitrification treatment technology for this feature at home and abroad is not mature enough, so the development of a suitable SCR catalyst has great practical significance for the application of sintering and pellet flue gas denitrification projects
[0005] So far, the relatively mature SCR denitrification catalyst is the vanadium-tungsten-titanium system, but because the catalytic reaction temperature reaches 300°C to 400°C, it is not suitable for sintering and pellet low-temperature flue gas denitrification
However, the problem of low-temperature denitration catalysts is that the denitration efficiency of the catalyst is low under low temperature conditions, and it is very easy to generate SO 2 Inactivation due to poisoning

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Measure a certain amount of oxalic acid to prepare it into a 5% oxalic acid solution, add 46g of ammonium metatungstate to heat and dissolve until completely dissolved;

[0033] Weigh 500g of titanium dioxide, add deionized water to stir; and add the oxalic acid solution of dissolved ammonium metatungstate during the stirring process, stir well and add ammonia water dropwise to adjust the pH to 8.8-9.0, filter, wash with water, After drying, a titanium dioxide carrier loaded with tungsten is obtained;

[0034] Get the mixture of 63g silica-aluminum oxide, 6g squash powder, 20g glass fiber, 5g hydroxypropyl cellulose and polyvinyl alcohol in the titanium dioxide carrier of loaded tungsten obtained in the previous step, carry out mixing, remove air bubbles, then It is extruded into a honeycomb shape of 50×50×200 mm, and the honeycomb body is gradually heated (45-100° C.) and dried for 90 hours, and then gradually heated (100-500° C.) in a muffle furnace and roasted for 15...

Embodiment 2

[0039] Measure a certain amount of oxalic acid to prepare it into a 5% oxalic acid solution, add 37g of ammonium metatungstate to heat and dissolve until completely dissolved;

[0040] Weigh 500g of titanium dioxide, add deionized water to stir; and add the oxalic acid solution of dissolved ammonium metatungstate during the stirring process, stir well and add ammonia water dropwise to adjust the pH to 8.8-9.0, filter, wash with water, After drying, a titanium dioxide carrier loaded with tungsten is obtained;

[0041] Get the mixture of 94g silica-alumina oxide, 8g squash powder, 30g glass fiber, 9g hydroxypropyl cellulose and polyvinyl alcohol in the titanium dioxide carrier of loading tungsten obtained in the previous step, carry out mixing, remove air bubbles, then It is extruded into a honeycomb shape of 50×50×200 mm, and the honeycomb body is gradually heated (45-100° C.) and dried for 90 hours, and then gradually heated (100-500° C.) in a muffle furnace and roasted for 15...

Embodiment 3

[0046] Measure a certain amount of oxalic acid and prepare it into a 5% oxalic acid solution, add 23g of ammonium metatungstate to heat and dissolve until completely dissolved;

[0047] Weigh 500g of titanium dioxide, add deionized water to stir; and add the oxalic acid solution of dissolved ammonium metatungstate during the stirring process, stir well and add ammonia water dropwise to adjust the pH to 8.8-9.0, filter, wash with water, After drying, a titanium dioxide carrier loaded with tungsten is obtained;

[0048] Get the mixture of 113g silicon-aluminum oxide, 10g squash powder, 35g glass fiber, 15g hydroxypropyl cellulose and polyvinyl alcohol in the titanium dioxide carrier of loaded tungsten obtained in the previous step, carry out mixing, remove air bubbles, then It is extruded into a honeycomb shape of 50×50×200 mm, and the honeycomb body is gradually heated (45-100° C.) and dried for 90 hours, and then gradually heated (100-500° C.) in a muffle furnace and roasted f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
denitrification rateaaaaaaaaaa
Login to View More

Abstract

The invention provides a titanium-based catalyst for flue gas denitration of a sintering machine and a pellet by aiming at the flue gas characteristics of the sintering machine and the pellet. The catalyst adopts a titanium dioxide and silicon-aluminum oxide mixture as a carrier, and tungsten oxide and rare earth complex oxide loaded on the carrier as active ingredients. The invention also relates to a preparation method of the catalyst. According to the catalyst prepared by the invention, the conversion rate between SO2 and SO3 is effectively reduced, the catalyst activity reaction temperature range is lowered, and the catalyst has higher denitration efficiency at the operating temperature ranging from 120 DEG C to 420 DEG C, has a certain metal ion resistant capability, and is suitable for sintering and pellet flue gas denitration reaction.

Description

technical field [0001] The invention belongs to the technical field of catalyst technology and environmental protection, and relates to a preparation technology of a denitrification catalyst, in particular to a titanium-based catalyst used for denitrification of sintering machine and pellet flue gas and a preparation method thereof. Background technique [0002] As an important pillar industry of the national economy, the iron and steel industry is also one of the most important pollutant emission industries in China. As one of the main air pollutants, nitrogen oxides are strictly restricted in my country. Survey results show that NO emissions from sintering and pelletizing processes in iron and steel enterprises X Accounting for the main process NO of iron and steel enterprises X half of the total emissions. Therefore control and reduce sintering and pelletizing process NO X emissions of the entire steel industry NO X key to reducing emissions. The "Steel Sintering an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01D53/86B01D53/56
Inventor 夏文启郭镇瑒谢学宝蔡文婧
Owner 内蒙古华元科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com