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Cleaning liquid for regenerated SCR (silicon controlled rectifier) denitration catalyst and method for regenerating SCR denitration catalyst

A denitration catalyst and cleaning liquid technology, which is applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc. cost effect

Inactive Publication Date: 2014-05-28
无锡华光新动力环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The SCR denitrification catalyst is a vanadium-tungsten-titanium-based catalyst, and there is a problem that the denitrification performance decreases during the operation of the SCR denitrification system.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0021] The cleaning solution for the regenerated SCR denitration catalyst, which includes the penetration enhancer JFC with a mass ratio of 0.1%, the emulsifier OP-10 with a mass ratio of 0.1%, the leveling agent PingpingjiaO with a mass ratio of 0.1%, and a mass ratio of 1 % sulfuric acid, vanadyl sulfate with a mass ratio of 0.5%, ammonium metatungstate with a mass ratio of 1%, corrosion inhibitor with a mass ratio of 0.1%, and the rest are water. The total mass percentage of each substance is 100%. After the above materials were mixed, they were mechanically stirred for 20 min to obtain a cleaning solution.

[0022] The method for using the cleaning solution to regenerate the SCR denitration catalyst, its specific process steps are as follows:

[0023] a High-pressure water washing: Take the deactivated SCR denitrification catalyst to be regenerated and wash it with 5MPa high-pressure water for 3 times;

[0024] b Ultrasonic immersion: Take the SCR denitrification catalyst...

specific Embodiment 2

[0026] The cleaning solution for the regenerated SCR denitrification catalyst, which includes the penetration enhancer JFC with a mass ratio of 0.5%, the emulsifier OP-10 with a mass ratio of 0.5%, the leveling agent PingpingjiaO with a mass ratio of 0.5%, and a mass ratio of 5 % sulfuric acid, vanadyl sulfate with a mass ratio of 2.5%, ammonium metatungstate with a mass ratio of 2.5%, corrosion inhibitor with a mass ratio of 0.5%, and the rest are water. The total mass percentage of each substance is 100%, The above materials were mixed and stirred mechanically for 25 minutes to obtain a cleaning solution.

[0027] The method for using the cleaning solution to regenerate the SCR denitration catalyst, its specific process steps are as follows:

[0028] a High-pressure water washing: Take the deactivated SCR denitrification catalyst to be regenerated and wash it 4 times with 12MPa high-pressure water;

[0029] b Ultrasonic immersion: take the SCR denitrification catalyst obtai...

specific Embodiment 3

[0031] The cleaning solution for the regenerated SCR denitrification catalyst, which includes the penetration enhancer JFC with a mass ratio of 1%, the emulsifier OP-10 with a mass ratio of 1%, the leveling agent Pingping plus O with a mass ratio of 1%, and a mass ratio of 10 % sulfuric acid, vanadyl sulfate with a mass ratio of 5%, ammonium metatungstate with a mass ratio of 5%, corrosion inhibitor with a mass ratio of 1%, and the rest are water. The total mass percentage of each substance is 100%. After the above substances were mixed, they were mechanically stirred for 30 minutes to obtain a cleaning solution.

[0032] The method for using the cleaning solution to regenerate the SCR denitration catalyst, its specific process steps are as follows:

[0033] a High-pressure water washing: Take the deactivated SCR denitrification catalyst to be regenerated and wash it 5 times with 18MPa high-pressure water;

[0034] b Ultrasonic immersion: take the SCR denitrification catalyst...

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Abstract

The invention provides a cleaning liquid for a regenerated SCR (silicon controlled rectifier) denitration catalyst. The cleaning liquid can treat an inactivated catalyst, so that the denitration performance of the catalyst can be recovered; the waste solid pollution is relieved, and the running cost of flue gas denitration engineering of a coal-fired power plant can be reduced. The cleaning liquid comprises the following components in percentage by weight: 0.1-1 percent of a penetration enhancer JFC, 0.1-1 percent of an emulsifier OP-10, 0.1-1 percent of a leveling agent peregal O, 1-10 percent of a sulfuric acid, 0.5-5 percent of vanadyl sulfate, 1-5 percent of ammonium metatungsten, 0.1-1 percent of a corrosion inhibitor and the balance of water; the total mass percentage of all the substances is 100; the substances are mechanically stirred after being mixed for 20-30 minutes, so that the cleaning liquid is obtained.

Description

technical field [0001] The invention relates to the technical field of deactivated denitration catalyst regeneration, which provides a cleaning solution for regenerating the SCR denitration catalyst, and also provides a method for regenerating the SCR denitration catalyst. Background technique [0002] With the implementation of the "Emission Standard of Air Pollutants for Thermal Power Plants" (GB13223-2011), coal-fired power plants have begun to widely use SCR denitrification systems. The main principle of the SCR denitrification system is that under the action of the SCR denitrification catalyst, the NH injected into the exhaust gas of the boiler 3 and other reducing agents, react with NOx in the flue gas to generate harmless N 2 and H 2 O. [0003] The SCR denitration catalyst is a vanadium-tungsten-titanium-based catalyst, and there is a problem that the denitration performance decreases during the operation of the SCR denitration system. There are many factors ...

Claims

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Application Information

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IPC IPC(8): B01J38/66
Inventor 赵建新钱军尤毓敏高宽峰孙志翱
Owner 无锡华光新动力环保科技股份有限公司
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