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Preparing method of denitration catalyst regeneration intensity repair fluid and repair fluid and regeneration denitration catalyst thereof

A technology for denitration catalyst and repair solution, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of improving the property, repairing the mechanical strength, and improving the bonding strength

Inactive Publication Date: 2017-01-25
河南康宁特环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent 201610030350.1 used inorganic adhesive to repair the mechanical strength of the catalyst after the catalyst was regenerated, but did not give the comparative data of the specific strength repair, and the effect is difficult to predict

Method used

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  • Preparing method of denitration catalyst regeneration intensity repair fluid and repair fluid and regeneration denitration catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation process of strength restoration fluid is as follows:

[0032] (1) At room temperature, take 8 parts by weight of titanium dioxide containing 5% tungsten, 3 parts of silica sol, 0.5 parts of activated alumina and 85 parts of deionized water, and add them to the mixer, stir until they are evenly mixed to obtain a suspension ;

[0033] (2) Add 0.05 parts by weight of methyl cellulose (binder) to the suspension obtained in step (1), stir until the methyl cellulose is completely dissolved, then add 0.5 mol / L nitric acid to adjust the pH to 3, forming Stabilize the solution; then add 0.1 parts by weight of ammonium metavanadate and ball mill for 1 hour to obtain the strength restoration solution with a particle size of D 90 3.5 μm.

[0034] The application of strength repair fluid in the regeneration of denitrification catalyst, the operation steps are as follows:

[0035] (i) The honeycomb denitrification catalyst deactivated after use is 150 mm × 150 mm ...

Embodiment 2

[0038] The preparation process of strength restoration fluid is as follows:

[0039] (1) At room temperature, take 10 parts of titanium dioxide containing 3% tungsten, 2 parts of silica sol, 1 part of pseudoboehmite and 85 parts of deionized water in parts by weight, and add them to the mixer, and stir until they are evenly mixed and suspended. turbid liquid;

[0040] (2) Add 0.1 parts by weight of hydroxymethyl cellulose (binder) to the suspension obtained in step (1), stir until the methyl cellulose is completely dissolved, then add 0.8 mol / L sulfuric acid to adjust the pH to 1, Form a stable solution; then add 1 part by weight of vanadyl sulfate, and ball mill for 3 hours to obtain a strength restoration solution with a particle size of D 90 2.0 μm.

[0041] The application of strength repair fluid in the regeneration of denitrification catalyst, the operation steps are as follows:

[0042] (i) The deactivated honeycomb denitrification catalyst after use is 150mm×150mm×...

Embodiment 3

[0045] The preparation process of strength restoration fluid is as follows:

[0046] (1) At room temperature, take 8 parts by weight of molybdenum-containing 5% titanium dioxide, 3 parts of silica sol, 0.8 parts of pseudoboehmite and 85 parts of deionized water, and add them to the mixer, and stir until they are evenly mixed and suspended. turbid liquid;

[0047] (2) Add 0.05 parts by weight of polyethylene oxide (binder) to the suspension obtained in step (1), stir until the methyl cellulose is completely dissolved, then add 0.6 mol / L hydrochloric acid to adjust the pH to 3 to form a stable solution; then add 0.1 parts by weight of ammonium metavanadate and ball mill for 3 hours to obtain the strength restoration solution with a particle size of D 90 4.0 μm.

[0048] The application of strength repair fluid in the regeneration of denitrification catalyst, the operation steps are as follows:

[0049] (i) The plate-type denitrification catalyst 456mm×456mm×500mm that has be...

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Abstract

The invention provides a preparing method of denitration catalyst regeneration intensity repair fluid according to the problems existing in the conventional catalyst regeneration technology, comprising the steps of: (1) 8- 10 parts by weight of titanium dioxide containing tungsten or molybdenum, 2-3 parts of silica solution, 0.5-1 part of suspension from being mixed and stirred evenly with 70-100 parts of deionized water; (2) 0.05-0.1 part by weight of binder is then added in the suspension obtained in step (1), and stirred until the complete dissolution of the binder, after which the pH of the suspension is regulated as 1-3. Then 0.1-1 part by weight of ammonium metavanadate or vanadyl sulfate is added and ball ground to obtain the intensity repair liquid, and then the same is used for regenerating the inactivated denitration catalyst. The mechanical properties of the regenerated catalyst are improved obviously while the activity thereof is improved.

Description

technical field [0001] The invention belongs to the technical field of denitrification catalyst regeneration, and in particular relates to a preparation method of a denitrification catalyst regeneration strength restoration liquid, the strength restoration liquid, and a regeneration denitration catalyst. Background technique [0002] As an important raw material for the operation of denitrification systems in coal-fired thermal power plants, the cost of denitrification catalysts accounts for about 40% of the total investment cost of denitrification projects. Therefore, by taking measures to regenerate the used denitrification catalyst and improve the recycling efficiency of the denitrification catalyst, it becomes a breakthrough for coal-fired thermal power plants to reduce the operating cost of the denitrification system. [0003] Regeneration of denitrification catalyst refers to the analysis of the cause of catalyst deactivation, and the adoption of corresponding technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/60B01J38/48B01J23/28B01J23/30B01J23/92B01D53/86B01D53/54
CPCB01J38/60B01D53/8621B01D2258/0283B01J23/28B01J23/30B01J23/92B01J38/485
Inventor 张涛周彦霞张天天桑宇飞杨晓向赵擎歌钱晓东罗少鹏
Owner 河南康宁特环保科技股份有限公司
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