SCR denitration catalyst end face hardening hydrosol and preparation method therefor

A denitration catalyst and end-face hardening technology, applied in catalyst activation/preparation, catalyst protection, chemical instruments and methods, etc., can solve the problems of catalyst wear, high wear rate, reducing catalyst denitration efficiency and service life, etc., to achieve extended service life, The effect of improved wear resistance

Active Publication Date: 2016-03-23
HUADIAN QINGDAO ENVIRONMENTAL TECHNOLOCY CO LTD
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flue gas ash content of coal-fired power plants in my country is high, which will cause non-renewable wear and tear on the catalyst under the condition of high space velocity, thereby reducing the denitrification efficiency and life of the catalyst
There are two main types of hardening measures commonly used in the prior art: the first is to use a salt solution of hardening elements, this method has high wear rate, short wear life and denitrification due to its small load and part of the hardening liquid is inactive. The efficiency is reduced; the second method is to add wear-resistant raw materials into the catalyst matrix. Although this method has high wear resistance and wear life, it will be accompanied by inevitable phase changes during use. volume effect resulting in fragmentation of the catalyst

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

[0014] 1) Dissolve 0.6kg of oxalic acid in 2.4kg of water; put 1kg of ammonium metavanadate into the chemical tank, add 1kg of water, start stirring, and the stirring speed is 700 rpm;

[0015] 2) Add the dissolved oxalic acid solution into the stirred ammonium metavanadate turbid solution through a flowmeter at a rate of 240ml / min, and continue stirring until the solution is clear;

[0016] 3) Add 80g of polyvinyl alcohol to the clear solution and stir until the polyvinyl alcohol is completely dissolved (mixed solution);

[0017] 4) Dissolve 8kg of solid aluminum sulfate in 32kg of water;

[0018] 5) Fully mix the aluminum sulfate solution and the prepared A solution;

[0019] 6) While stirring (stirring speed: 200 rpm), gradually add ammonia water (concentration: 28%, 200ml / min) to the mixed solution until the pH is 6.2.

Embodiment 2

[0021] 1) Dissolve 0.8kg of oxalic acid in 2kg of water; put 1kg of ammonium metavanadate into the chemical tank, add 1.2kg of water, start stirring at 800 rpm; dissolve 100g of polyvinyl alcohol in 1kg in the water;

[0022] 2) After mixing the polyvinyl alcohol solution and the oxalic acid solution, add it to the stirred ammonium metavanadate turbid solution through a flow meter, the addition speed is 200ml / min, and continue to stir until the solution becomes clear to form a mixed solution;

[0023] 3) Dissolve 16kg of aluminum sulfate octadecahydrate in 30kg of water to form an aluminum sulfate solution;

[0024] 4) Mix the above two solutions thoroughly;

[0025] 5) While stirring (stirring speed: 300 rev / min), gradually add ammonia water (concentration: 28%, 200ml / min) to the mixed solution until the pH is 6.5.

Embodiment 3

[0027] 1) Dissolve 1kg of oxalic acid in 3kg of water; put 1.2kg of ammonium metavanadate into the chemical tank, add 1.2kg of water, start stirring at 750 rpm; dissolve 100g of polyvinyl alcohol in 1kg in the water;

[0028] 2) After mixing the polyvinyl alcohol solution and the oxalic acid solution, add it into the stirred ammonium metavanadate turbid solution through a flow meter, the addition speed is 150ml / min, and continue to stir until the solution becomes clear to form a mixed solution;

[0029] 3) Dissolve 15kg of aluminum sulfate octadecahydrate in 20kg of water to form an aluminum sulfate solution;

[0030] 4) Add 10kg of 20% urea solution to the aluminum sulfate solution, and heat to 80°C while stirring (800 rpm); at this time, the solution is a white hydrosol;

[0031] 5) Add the hydrosol to the mixture and mix thoroughly.

[0032] SCR denitrification catalyst end surface hardened hydrosol denitrification activity test example:

[0033] Select 4 SCR denitration...

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

No PUM Login to view more

Abstract

The invention provides SCR denitration catalyst end face hardening hydrosol and a preparation method therefor. The SCR denitration catalyst end face hardening hydrosol comprises the following components: an aluminum sulfate solution with a concentration of 20%-27%, an oxalic acid solution with a concentration of 25%-50% and an ammonium metavanadate solution with a concentration of 33%-66%, wherein, the weight part ratio of the oxalic acid solution to the ammonium metavanadate solution is (0.6-1):1, the oxalic acid solution and the ammonium metavanadate solution are mixed and a mixed solution is prepared, the weight part ratio of the aluminum sulfate solution, the mixed solution and polyvinyl alcohol is 1:(0.1-0.2):0.02. SCR denitration catalysts can be immersed in the SCR denitration catalyst end face hardening hydrosol, thus the load capacity of the SCR denitration catalysts is raised and the service life of the SCR denitration catalysts is prolonged.

Description

technical field [0001] The invention relates to environmental catalytic materials, in particular to an end-face-hardened hydrosol of an SCR denitration catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides not only cause environmental problems such as acid rain and photochemical smog, but also have adverse effects on human health. Therefore, the emission reduction and treatment of nitrogen oxides is an urgent issue. Take NH 3 Selective Catalytic Reduction (SCR) as a reducing agent is currently the most effective method for removing NOx from stationary sources in industry. my country's coal-fired power plants have high ash content in the flue gas, which will cause non-renewable wear to the catalyst under high space velocity conditions, thereby reducing the denitrification efficiency and life of the catalyst. There are two main types of hardening measures commonly used in the prior art: the first is to use a salt solution of hardening elem...

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): B01J33/00B01J37/02B01D53/90B01D53/56
CPCB01D53/56B01D53/90B01D2256/10B01D2257/40B01J33/00B01J37/0203B01J37/0213
Inventor 宋伟高春昱王正上穆世泉王新强陈华于宁王松孙静楠秦一鸣
Owner HUADIAN QINGDAO ENVIRONMENTAL TECHNOLOCY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap