A kind of denitrification catalyst end hardening liquid and its preparation method and application

A technology for denitrification catalyst and hardening solution, which is applied in the direction of catalyst activation/preparation, catalyst protection, chemical instruments and methods, etc. It can solve the problems of catalyst overall strength reduction, achieve good preparation and application performance, enhance hardness, and wear resistance The effect of improving corrosion performance

Inactive Publication Date: 2017-06-30
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alkali metal Na and sulfate contained in it will poison the catalyst, and sodium oxide has high mobility and activity in the catalyst, which will reduce the overall strength of the catalyst.

Method used

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  • A kind of denitrification catalyst end hardening liquid and its preparation method and application
  • A kind of denitrification catalyst end hardening liquid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare hardening solution according to the following formula and method:

[0033] (1) Dissolve 45g of phosphoric acid in 45g of deionized water and heat up to 60°C;

[0034] (2) Slowly add 10g of aluminum hydroxide in batches to (1) under stirring;

[0035] (3) heating to 120° C. for 2 hours to obtain a transparent solution;

[0036] (4) Add 0.5g of BYK-302 to (3) and stir evenly;

[0037] (5) Slowly add 4.5g of copper oxide powder, calcined at 950°C, the particle size is about 5-20μm, stir and disperse evenly to obtain the hardening solution.

[0038] The catalyst is impregnated according to the following process:

[0039] (1) After immersing 20 mm of the inlet end (or both ends of the air inlet and outlet) of the roasted and polished catalyst into the aforementioned hardening solution in stirring for 10 seconds;

[0040] (2) Blow off excess liquid with compressed air, and air-dry at room temperature for 5-8 hours;

[0041] (3) Catalyst treatment is completed by ...

Embodiment 2

[0044] Prepare hardening solution as follows:

[0045] (1) Dissolve 30g of phosphoric acid in 60g of deionized water and heat up to 60°C;

[0046] (2) Slowly add 10g of aluminum hydroxide in batches to (1) under stirring;

[0047] (3) heating to 120° C. for 2 hours to obtain a transparent solution;

[0048] (4) Add 0.5g of BYK-302 to (3) and stir evenly;

[0049] (5) Slowly add 4.5 g of copper oxide powder.

[0050] Dipping treatment process is the same as embodiment 1;

Embodiment 3

[0052] Prepare hardening solution as follows:

[0053] (1) Dissolve 60g of phosphoric acid in 30g of deionized water and heat up to 60°C;

[0054] (2) Slowly add 10g of aluminum hydroxide in batches to (1) under stirring;

[0055](3) heating to 120° C. for 2 hours to obtain a transparent solution;

[0056] (4) Add 0.5g of BYK-302 to (3) and stir evenly;

[0057] (5) Slowly add 4.5 g of copper oxide powder.

[0058] Dipping treatment process is the same as embodiment 1;

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Abstract

The invention belongs to the technical field of catalysts, and specifically relates to a denitrification catalyst end hardening solution and a preparation method and application thereof. The denitration catalyst end hardening solution is applied to a coal-fired boiler flue gas denitrification catalyst. The hardening solution includes the following raw materials in parts by weight: 5-25 parts of aluminum hydroxide, 30-60 parts of phosphoric acid, 30-60 parts of deionized water, 1-10 parts of metal oxide powder, and 0.1-1 part of suspending agent. The invention can improve the radial compressive strength of the catalyst end part by more than 150%, while maintaining more than 90% of the catalytic activity.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to the application of flue gas denitrification honeycomb catalysts to the field of flue gas with high space velocity and high dust content, in particular to a denitrification catalyst end hardening liquid and its preparation method and application. Background technique [0002] In recent years, environmental problems have become more and more prominent. As more and more people are aware of their harm to the environment and human beings, the country and the public are also paying more attention to them. Among them, NOx produced by chemical fuel combustion is a pollutant that has received great attention. It has been proven that it poses a huge threat to human health and the ecological environment. It is the main cause of acid rain and induces photochemical smog. my country is a country with abundant coal resources, and the NOx produced by coal combustion is the main source of NOx em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J33/00B01J37/02
Inventor 胡洧冰李敬王磊张向辉王蕾郑珩
Owner HAO HUA CHENGDU TECH
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