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

A kind of low-temperature flue gas denitrification agent and its preparation method and application

A technology of low temperature flue gas and denitrification agent, applied in the field of flue gas denitration purification, can solve the problems of low denitration efficiency, small amount of flue gas treated, frequent regeneration, etc. Effect

Active Publication Date: 2021-04-20
SOUTHWEST RES & DESIGN INST OF CHEM IND
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid absorption method has a small amount of flue gas treatment, low efficiency, and the by-products are not easy to handle, and there are problems in the application process
Activated carbon adsorption method uses a lot of adsorbents, huge equipment, frequent regeneration, and low denitrification efficiency
However, the SCR denitrification catalyst is only used in the medium and high temperature range, and when the temperature is lower than 200 ° C, because the sulfur dioxide and ammonia in the flue gas generate ammonium sulfate to cover the active site, resulting in the deactivation of the SCR catalyst, so the current SCR catalyst cannot be used for low temperature. At 200°C flue gas working conditions
[0004] For the field of flue gas denitrification below 200 °C, there is no good solution at present, and it is also a technical difficulty that researchers are currently tackling.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of low-temperature flue gas denitrification agent and its preparation method and application
  • A kind of low-temperature flue gas denitrification agent and its preparation method and application
  • A kind of low-temperature flue gas denitrification agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Active components and content: Ca(OH) 2 (60wt.%), light CaCO 3 (10wt.%);

[0040] Auxiliary and content: Co 2 o 3 (2wt.%);

[0041] Carbon source and content: activated carbon (10wt.%);

[0042] Binder and content: kaolin (13wt.%), cement (5wt.%).

[0043] Concrete preparation method is:

[0044] 1), weigh 7g Co(NO 3 ) 2 ·6H 2 O, dissolved in 10g of deionized water to prepare a solution, weighed 10g of 200-mesh activated carbon powder, evenly impregnated the solution on the activated carbon component, dried in an oven at 110°C for 2h, and then put it in a muffle furnace under nitrogen Decompose under the atmosphere, the temperature is 400 ℃, the time is 2h;

[0045] 2), weigh 60g of Ca(OH) with particle size of 200 mesh 2 , 10g 200 mesh particle size light CaCO 3, take by weighing 13g of kaolin with a particle size of 200 mesh, 5g of cement with a particle size of 200 mesh, and mix them uniformly with the sample prepared in step 1), and add deionized water o...

Embodiment 2

[0048] Active components and content: CaO (60wt.%), light CaCO 3 (10wt.%);

[0049] Auxiliary and content: Co 2 o 3 (2wt.%);

[0050] Carbon source and content: activated carbon (10wt.%);

[0051] Binder and content: kaolin (13wt.%), cement (5wt.%).

[0052] Concrete preparation method is:

[0053] 1), weigh 7g Co(NO 3 ) 2 ·6H 2 O, dissolved in 10g of deionized water to prepare a solution, weighed 10g of 200-mesh activated carbon powder, evenly impregnated the solution on the activated carbon component, dried in an oven at 110°C for 2h, and then put it in a muffle furnace under nitrogen Decompose under the atmosphere, the temperature is 400 ℃, the time is 2h;

[0054] 2), weigh 60g of CaO with particle size of 200 mesh, 10g of light CaCO with particle size of 200 mesh 3 , Weigh 13g of kaolin with a particle size of 200 mesh, 5g of cement with a particle size of 200 mesh, and mix them evenly with the sample prepared in step 1), and add 54g of deionized water by weight...

Embodiment 3

[0057] Active components and content: Ca(OH) 2 (70wt.%);

[0058] Auxiliary and content: Co 2 o 3 (2wt.%);

[0059] Carbon source and content: activated carbon (10wt.%);

[0060] Binder and content: kaolin (13wt.%), cement (5wt.%).

[0061] Concrete preparation method is:

[0062] 1), weigh 7g Co(NO 3 ) 2 ·6H 2 O, dissolved in 10g of deionized water to prepare a solution, weighed 10g of 200-mesh activated carbon powder, evenly impregnated the solution on the activated carbon component, dried in an oven at 110°C for 2h, and then put it in a muffle furnace under nitrogen Decompose under the atmosphere, the temperature is 400 ℃, the time is 2h;

[0063] 2), weigh 70g of Ca(OH) with particle size of 200 mesh 2 , take by weighing 13g of kaolin with a particle size of 200 mesh and 5g of cement with a particle size of 200 mesh, mix them evenly with the sample prepared in step 1), add 35g of deionized water, and knead in a kneader for 1h;

[0064] 3) Extrude the sample knea...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a low-temperature flue gas denitrification agent, which belongs to the technical field of flue gas denitrification purification. In parts by weight, it includes 30-80 parts of active components, 0.1-10 parts of auxiliary agents, 1-20 parts of carbon sources and 2-30 parts of binders; the active component is CaCO 3 , CaO, Ca(OH) 2 One or more of them; the auxiliary agent is Fe 2 o 3 , MnO 2 , CuO, Co 2 o 3 One or more of them; the carbon source is one or more of activated carbon, activated carbon fiber, pulverized coal, fly ash, fly ash, biomass fiber; the binder is kaolin, bentonite, gypsum, One or several types of cement. The invention also provides a preparation method of the denitration agent. The denitrification agent of the invention has low raw material cost, good denitrification effect, high denitrification capacity, and the use temperature can be as low as normal temperature. The denitrification agent cooperates with the dry moving bed denitrification process or the fixed bed dry denitrification process, and has the effect of denitrification and dust removal during the application process.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitrification and purification, in particular to a low-temperature flue gas denitrification agent and its preparation method and application. Background technique [0002] NOx is one of the main pollutants in the atmosphere. It causes a series of hazards such as acid rain and photochemical smog, which seriously affects the ecological environment and human health. my country is a country with abundant coal resources, and the flue gas produced by coal combustion is the main source of NOx emissions. Therefore, reducing NOx emissions is the top priority of pollution reduction in my country. [0003] Flue gas denitrification has selective catalytic reduction (SCR), liquid absorption, activated carbon adsorption and other technologies. SCR has become the mainstream technology due to its high denitrification efficiency and mature and reliable technology. The liquid absorption method has a small amou...

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 Patents(China)
IPC IPC(8): B01D53/56B01D53/86B01D49/00
CPCB01D49/00B01D53/565B01D53/8628B01D2251/404B01D2251/602B01D2251/604B01D2251/606B01D2255/2073B01D2255/20738B01D2255/20746B01D2255/20761B01D2255/702B01D2258/0283
Inventor 苏敏赵丹张明胜李启强颜智胡洧冰郑珩张新波
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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