SCR flue gas denitration catalyst regeneration liquid and preparation method thereof

A denitrification catalyst and regeneration solution technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of improvement of anti-toxicity of uncatalyzed catalysts, shortened service life of catalysts, reduced service life of catalysts, etc. problems, to achieve the effect of improving anti-virus ability, prolonging service life and improving service life

Pending Publication Date: 2020-06-23
JIANGSU FENGYE TECH ENVIRONMENTAL PROTECTION GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above scheme restores the catalyst activity through the regeneration solution, but there are still deficiencies: although the scheme supplements the active components V, W, and Mo required by the catalyst, the catalyst activity is restored to a certain extent, but the supplemented active components are unevenly dispersed. It is very

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The SCR flue gas denitrification catalyst regeneration solution in this embodiment includes an activity recovery solution, an anti-toxic inhibitor solution and a cleaning solution, and the weight ratio of the activity recovery solution, the anti-virus inhibitor solution and the cleaning solution is 1:0.3:5;

[0030] The raw material components and weight content of the active recovery solution are: 5 parts of vanadyl acetate, 1 part of ammonium metatungstate, 0.08 part of cerium oxalate, 0.06 part of lanthanum nitrate, 0.02 part of surface penetrant, and 90 parts of deionized water;

[0031] The raw material components and weight content of the anti-toxic inhibitor liquid are: 3 parts of ammonium tungstate pentahydrate, 0.8 part of cesium nitrate, 0.8 part of ammonium cerium sulfate, and 85 parts of deionized water;

[0032] The raw material components and weight content of the cleaning solution are: 6 parts of acid, 1 part of surfactant, 0.6 part of dispersant, and 80 p...

Embodiment 2

[0042] The SCR flue gas denitrification catalyst regeneration solution in this embodiment includes an activity recovery solution, an anti-toxic inhibitor solution and a cleaning solution, and the weight ratio of the activity recovery solution, the anti-virus inhibitor solution and the cleaning solution is 1:0.3:5;

[0043] The raw material components and weight content of the active recovery solution are: 7 parts of vanadyl acetate, 2 parts of ammonium metatungstate, 0.10 parts of cerium oxalate, 0.08 parts of lanthanum nitrate, 0.04 parts of surface penetrant, and 90 parts of deionized water;

[0044] The raw material components and weight content of the anti-toxic inhibitor liquid are: 5 parts of ammonium tungstate pentahydrate, 1.2 parts of cesium nitrate, 1.2 parts of ammonium cerium sulfate, and 85 parts of deionized water;

[0045] The raw material components and weight content of the cleaning solution are: 8 parts of acid, 2 parts of surfactant, 1.0 part of dispersant, a...

Embodiment 3

[0055] The SCR flue gas denitrification catalyst regeneration solution in this embodiment includes an activity recovery solution, an anti-toxic inhibitor solution and a cleaning solution, and the weight ratio of the activity recovery solution, the anti-virus inhibitor solution and the cleaning solution is 1:0.3:5;

[0056] The raw material components and weight content of the active recovery solution are: 6 parts of vanadyl acetate, 1.5 parts of ammonium metatungstate, 0.09 parts of cerium oxalate, 0.07 parts of lanthanum nitrate, 0.03 parts of surface penetrant, and 90 parts of deionized water;

[0057] The raw material components and weight content of the anti-toxic inhibitor liquid are: 4 parts of ammonium tungstate pentahydrate, 1.0 part of cesium nitrate, 1.0 part of ammonium cerium sulfate, and 85 parts of deionized water;

[0058] The raw material components and weight content of the cleaning solution are: 7 parts of acid, 1.5 parts of surfactant, 0.8 part of dispersant,...

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PUM

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Abstract

The invention relates to an SCR flue gas denitration catalyst regeneration liquid and a preparation method thereof, the regeneration liquid comprises an activity recovery liquid, an antitoxic inhibition liquid and a cleaning liquid, and the weight ratio of the activity recovery liquid to the antitoxic inhibition liquid to the cleaning liquid is 1: 0.3: 5; wherein the activity recovery liquid is prepared from vanadyl acetate, ammonium metatungstate, cerium oxalate, lanthanum nitrate, a surface penetrating agent and deionized water; wherein the antitoxic inhibition liquid is prepared from ammonium tungstate pentahydrate, cesium nitrate, ceric ammonium sulfate and deionized water; the cleaning liquid is composed of acid, a surfactant, a dispersing agent and deionized water. The regeneration liquid provided by the invention can be used for regenerating the deactivated catalyst, has the advantages of good regeneration effect, low SO2/SO3 conversion rate and the like, and the regenerated catalyst has better anti-toxic performance, so that the service life of the regenerated catalyst is prolonged.

Description

technical field [0001] The invention relates to the technical field of environmental protection catalysts, in particular to an SCR flue gas denitrification catalyst regeneration solution and a preparation method thereof. Background technique [0002] With the increasingly strict control of nitrogen oxide emissions, the SCR denitrification process has been more and more widely used as the most effective denitrification method. Catalyst is the core of the process. The cost of catalyst accounts for about 20% of the initial construction cost of the SCR system. During operation, the cost of catalyst replacement accounts for about 50% of the total system price. In actual operation, industrial catalysts will gradually age and fail over time, so the life of the catalyst determines the cost of the SCR system, and the catalyst replaced due to the decline in activity contains vanadium pentoxide, heavy metals and other substances. It is a hazardous substance and must be recycled. And ...

Claims

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Application Information

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IPC IPC(8): B01J38/48B01J38/52B01J38/60B01J38/62B01D53/96B01D53/86B01D53/56
CPCB01J38/485B01J38/52B01J38/62B01J38/60B01J38/48B01D53/8625B01D53/96B01D2258/0283
Inventor 蒋峰朱军武华攀龙
Owner JIANGSU FENGYE TECH ENVIRONMENTAL PROTECTION GRP CO LTD
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