Antitoxic regeneration solution of deactivated SCR denitration catalyst, and preparation method thereof

A denitration catalyst and regeneration liquid technology, which is applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of deactivation, mechanical strength drop, catalyst poisoning, etc., and prolong the service life. , the effect of improving thermal stability

Active Publication Date: 2013-02-20
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
View PDF3 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned technology does not modify the anti-poison ability of the catalyst, which leads to the fact that the regenerated catalyst is still easily poisoned and deactivated during use, which reduces the service life ...

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
  • Antitoxic regeneration solution of deactivated SCR denitration catalyst, and preparation method thereof
  • Antitoxic regeneration solution of deactivated SCR denitration catalyst, and preparation method thereof
  • Antitoxic regeneration solution of deactivated SCR denitration catalyst, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation of active replenishing liquid, weigh 2.5wt% ammonium metavanadate and 5wt% ammonium tungstate in oxalic acid solution according to weight ratio, adjust pH value to 6, stir mechanically for 30 minutes, mix evenly, and prepare active Supplementary fluid;

[0030] 2, the preparation of anti-toxic modification liquid, take by weight 0.05wt% germanium nitrate, 0.05wt% ammonium molybdate tetrahydrate, 0.01wt% cerium ammonium nitrate, add deionized water to dissolve, mechanically stir for 30min, make It is mixed evenly and formulated into an anti-toxic modified liquid;

[0031] 3. Preparation of additive solution, weigh 0.05wt% penetrating agent JFC, 0.05wt% dispersant sodium dodecylbenzene sulfonate, 0.05wt% adhesive polyvinyl alcohol by weight, add deionized water to dissolve, Stir mechanically for 10 minutes to make it evenly mixed and prepare an additive solution;

[0032] 4. Add the active replenishing liquid and the anti-toxic modifying liquid to the add...

Embodiment 2

[0034] 1. Preparation of active replenishing solution, weigh 10wt% ammonium metavanadate and 25wt% ammonium tungstate in oxalic acid solution by weight, adjust the pH value to 3, stir mechanically for 60 minutes, make it evenly mixed, and prepare active supplement liquid;

[0035] 2. Preparation of anti-toxic modified solution, weigh 3wt% germanium nitrate, 3wt% ammonium molybdate tetrahydrate, and 1wt% cerium ammonium nitrate by weight ratio, add deionized water to dissolve, and stir mechanically for 60 minutes to make it evenly mixed , formulated as an anti-toxic modified liquid;

[0036] 3. Preparation of additive solution, weigh 1wt% penetrating agent JFC, 1wt% dispersant sodium dodecylbenzene sulfonate, 1wt% adhesive polyvinyl alcohol by weight, add deionized water to dissolve, mechanically stir for 30min , make it evenly mixed, and prepare additive solution;

[0037] 4. Add the active replenishing liquid and the anti-toxic modifying liquid to the additive solution in s...

Embodiment 3

[0039] 1. Preparation of active replenishing liquid, weigh 5wt% ammonium metavanadate and 15wt% ammonium tungstate and dissolve in the mixed acid solution of oxalic acid and citric acid, adjust the pH value to 5, stir mechanically for 45min to make it evenly mixed , formulated as an active supplement;

[0040] 2, the preparation of anti-toxic modification liquid, take by weight 1.5wt% germanium nitrate, 1.5wt% ammonium molybdate tetrahydrate, 0.5wt% cerium ammonium nitrate, add deionized water to dissolve, mechanically stir for 45min, make It is mixed evenly and formulated into an anti-toxic modified liquid;

[0041] 3. The preparation of additive solution, weigh 0.5wt% penetrating agent JFC, 0.5wt% dispersant sodium dodecylbenzene sulfonate, 0.5wt% adhesive polyvinyl alcohol by weight, add deionized water to dissolve, Stir mechanically for 20 minutes to make it evenly mixed and prepare an additive solution;

[0042]4. Add the active replenishing liquid and the anti-toxic mo...

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 relates to an antitoxic regeneration solution of a deactivated SCR denitration catalyst, and a preparation method thereof. The antitoxic regeneration solution comprises an active replenisher, an antitoxic modification liquid, and an additive component. The active replenisher comprises ammonium metavanadate, ammonium tungstate, and acid liquid. The antitoxic modification liquid comprises germanium nitrate, ammonium molybdate tetrahydrate, and ammonium cerium nitrate. The additive component comprises a penetrating agent, a dispersing agent, and an adhesive. According to the invention, the prepared active replenisher, antitoxic modification liquid, and additive component are well mixed according to a certain weight ratio, such that an antitoxic regeneration solution is obtained. The solution and the preparation method provided by the invention have the advantages that: the deactivated catalyst is pickled, and active components are simultaneously replenished, such that catalyst denitrification efficiency is recovered to above 90%. With the existence of the antitoxic component, the antitoxic performance of the catalyst is substantially improved, such that catalyst arsenic, sulfur and alkali metal toxic effects can be effectively relieved, and service life of the catalyst after regeneration is prolonged.

Description

technical field [0001] The invention relates to a catalyst regeneration liquid and a preparation method thereof, in particular to an anti-toxic regeneration liquid suitable for deactivating SCR denitrification catalysts in coal-fired power plants and a preparation method thereof. Background technique [0002] As a primary pollutant, nitrogen oxides are harmful to human health and can also produce a variety of secondary pollution. It is one of the important precursors for the formation of ozone and is also an important cause of regional fine particle pollution and haze. In 2011, the national nitrogen oxide emissions did not fall but rose by 5.73%. In view of the adverse impact of nitrogen oxides on the atmospheric environment and the current severe situation of nitrogen oxide emission control in thermal power plants, the country proposed the "Twelfth Five-Year Plan" nitrogen oxide emission Planning and requirements: The total emission of nitrogen oxides in key industries and ...

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
IPC IPC(8): B01J38/66B01J38/64B01J38/62
Inventor 盘思伟汤龙华韦正乐赵宁李丽黄碧纯
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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