Denitration catalyst regeneration solution and preparation method thereof as well as catalyst regeneration method

A denitrification catalyst and regeneration solution technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve good catalytic performance, improve oxygen removal capacity, and improve catalytic performance

Active Publication Date: 2014-07-30
江苏万德环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] SCR denitrification catalysts are consumables. The chemical life is usually three years, and the mechanical life is

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example one

[0023] For inactivated but still mechanical life and SO 2 / SO 3 The denitration catalyst with a conversion rate of 0.53% is regenerated by the following steps:

[0024] ⑴The following components and weight content prepare the raw materials of the cleaning solution, fatty alcohol polyoxyethylene ether: 0.8 parts; polyethylene glycol fatty acid ester: 0.8 parts; ethanol: 9 parts; deionized water: 88 parts; Mix and stir in the cleaning tank to obtain the cleaning solution of denitration catalyst;

[0025] ⑵Prepare the raw materials of the regeneration solution according to the following components and weight content, vanadyl oxalate: 4 parts; cerium nitrate: 0.08 parts; lanthanum nitrate: 0.11 parts; copper nitrate: 0.05 parts; silica sol ST-O: 0.4 parts; deionized water : 95 parts; first put vanadyl oxalate and deionized water into the batching tank and stir evenly, then continue to put cerium nitrate, lanthanum nitrate and copper nitrate into the batching tank a...

Example Embodiment

[0029] Example two

[0030] For inactivated but still mechanical life and SO 2 / SO 3 The denitration catalyst with a conversion rate of 0.62% is regenerated by the following steps:

[0031] ⑴ Prepare cleaning solution raw materials for the following components and weight content, fatty alcohol polyoxyethylene ether: 1.0 part; polyethylene glycol fatty acid ester: 1.0 part; ethanol: 10 parts; deionized water: 88 parts; Mix and stir in the cleaning tank to obtain the cleaning solution of denitration catalyst;

[0032] ⑵ The following components and weight content are prepared as raw materials for the regeneration solution, vanadyl oxalate: 5 parts; cerium nitrate: 0.09 parts; lanthanum nitrate: 0.12 parts; copper nitrate: 0.06 parts; silica sol ST-O: 0.5 parts; deionized water: 95 parts; first put vanadyl oxalate and deionized water into the batching tank and stir evenly, then continue to put cerium nitrate, lanthanum nitrate and copper nitrate into the batching tank and stir until c...

Example Embodiment

[0036] Example three

[0037] For inactivated but still mechanical life and SO 2 / SO 3 The denitration catalyst with a conversion rate of 0.67% is regenerated as follows:

[0038] ⑴The following components and weight content prepare the raw materials of the cleaning solution. Fatty alcohol polyoxyethylene ether: 1.2 parts; polyethylene glycol fatty acid ester: 1.2 parts; ethanol: 11 parts; deionized water: 88 parts; Mix and stir in the cleaning tank to obtain the cleaning solution of denitration catalyst;

[0039] ⑵Prepare the raw materials of the regeneration solution according to the following components and weight content, vanadyl oxalate: 6 parts; cerium nitrate: 0.10 parts; lanthanum nitrate: 0.13 parts; copper nitrate: 0.07 parts; silica sol ST-O: 0.6 parts; deionized water : 95 parts; first put vanadyl oxalate and deionized water into the batching tank and stir evenly, then continue to put cerium nitrate, lanthanum nitrate and copper nitrate into the batching tank and stir u...

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PUM

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Abstract

The invention discloses a denitration catalyst regeneration solution and a preparation method thereof as well as a catalyst regeneration method. The denitration catalyst regeneration solution comprises the following raw material ingredients in parts by weight: 4-6 parts of vanadyl oxalate, 0.08-0.10 part of cerium nitrate, 0.11-0.13 part of lanthanum nitrate, 0.05-0.07 part of copper nitrate, 0.4-0.6 part of silica sol ST-O and 95 parts of deionized water. The catalyst regeneration method comprises the following steps of firstly, evenly mixing vanadyl oxalate and the deionized water; then, feeding cerium nitrate, lanthanum nitrate and copper nitrate into mixed solution, and fully stirring until the mixture is completely dissolved; finally, feeding silica sol ST-O, and continuing to stir until homogeneous phase is obtained; and sequentially carrying out strong scavenging and ultrasonic cleaning on an inactivated denitration catalyst module, soaking the module in cleaning solution for 18-25 minutes, continuing soaking the module in the regeneration solution for 25-40 minutes, taking out the denitration catalyst module and drying. After the denitration catalyst regeneration solution and the catalyst regeneration method are adopted, the activity of the inactivated denitration catalyst can be efficiently recovered, and the temperature range of the catalyst activity is widened.

Description

technical field [0001] The invention relates to a denitrification catalyst regeneration solution, and also relates to a preparation method of the denitration catalyst regeneration solution and a regeneration method of the denitration catalyst. Background technique [0002] Nitrogen oxides are one of the main pollutants in the atmosphere and one of the important sources of a series of environmental problems such as photochemical smog pollution, urban haze weather, and atmospheric acid deposition. Since nitrogen oxides can be transported for long distances in the atmosphere, the regional and even global pollution problems caused by them have become increasingly prominent. Selective Catalytic Reduction (SCR) is a method of eliminating nitrogen oxide pollution under the action of a specific catalyst, specifically reducing nitrogen oxides NOx to N2 and H2O selectively using ammonia or other reducing agents. [0003] Due to the high efficiency and practicability of the SCR method...

Claims

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Application Information

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IPC IPC(8): B01J38/52
Inventor 王文选曹璐华杰李守信许峰于光喜华攀龙
Owner 江苏万德环保科技有限公司
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