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Regeneration method of deactivated catalyst

A technology for deactivating catalysts and catalysts, applied in chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve problems such as blockage of pores, deposition, and reduction of catalyst service life, and achieve increased strength, increased specific surface area, and savings. Effect of drying time

Active Publication Date: 2015-06-17
南京宇行环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN102935388A discloses an anti-toxic regenerated liquid of an inactivated SCR denitrification catalyst and its preparation method, which effectively improves the anti-toxic ability of the catalyst, but its traditional small pore structure cannot meet the practical needs, and macromolecular dust and other Species may still clog pores or deposit on external surfaces reducing catalyst life

Method used

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  • Regeneration method of deactivated catalyst
  • Regeneration method of deactivated catalyst
  • Regeneration method of deactivated catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The catalyst of above-mentioned deactivation adopts following steps successively to process:

[0030] (1) Rinse the deactivated SCR denitrification catalyst with dry compressed air for 20 minutes to remove loosely adhered dust and ash on the surface of the deactivated catalyst;

[0031] (2) In the presence of ultrasonic waves, immerse the deactivated SCR catalyst treated in step (1) in deionized water to remove soluble matter and some particles on the surface of the catalyst, and then perform drying treatment to remove deionized water;

[0032] Wherein, the power of the ultrasonic wave is 200W, and the processing time is 50min.

[0033] (3) In the presence of ultrasonic waves, impregnate the deactivated SCR catalyst after the drying treatment in step (2) with a cleaning solution to remove alkaline earth metals and alkali metal elements on the surface of the catalyst, and then perform drying treatment again to remove the cleaning solution ;

[0034] Wherein, the ultras...

Embodiment 2

[0044] The catalyst of above-mentioned deactivation adopts following steps successively to process:

[0045] (1) Rinse the deactivated SCR denitrification catalyst with dry compressed air for 30 minutes to remove loosely adhered dust and ash on the surface of the deactivated catalyst;

[0046] (2) In the presence of ultrasonic waves, immerse the deactivated SCR catalyst treated in step (1) in deionized water to remove soluble matter and some particles on the surface of the catalyst, and then perform drying treatment to remove deionized water;

[0047] Wherein, the power of the ultrasonic wave is 350W, and the treatment time is 30min.

[0048](3) In the presence of ultrasonic waves, impregnate the deactivated SCR catalyst after the drying treatment in step (2) with a cleaning solution to remove alkaline earth metals and alkali metal elements on the surface of the catalyst, and then perform drying treatment again to remove the cleaning solution ;

[0049] Among them, the ultra...

Embodiment 3

[0059] The catalyst of above-mentioned deactivation adopts following steps successively to process:

[0060] (1) Rinse the deactivated SCR denitrification catalyst with dry compressed air for 40 minutes to remove loosely adhered dust and ash on the surface of the deactivated catalyst;

[0061] (2) In the presence of ultrasonic waves, immerse the deactivated SCR catalyst treated in step (1) in deionized water to remove soluble matter and some particles on the surface of the catalyst, and then perform drying treatment to remove deionized water;

[0062] Wherein, the power of the ultrasonic wave is 500W, and the processing time is 10min.

[0063] (3) In the presence of ultrasonic waves, impregnate the deactivated SCR catalyst after the drying treatment in step (2) with a cleaning solution to remove alkaline earth metals and alkali metal elements on the surface of the catalyst, and then perform drying treatment again to remove the cleaning solution ;

[0064] Wherein, the ultras...

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Abstract

The invention discloses a regeneration method of a deactivated catalyst and belongs to the field of atmospheric pollution control and environmental protection. The regeneration method comprises the steps of washing the deactivated catalyst with dry compressed air, immersing in deionized water, carrying out ultrasonic treatment, carrying out ultrasonic immersing with cleaning liquid after the treatment, drying to remove water after immersing, putting the catalyst after water removal into an autoclave for immersing with a pore-enlarging agent, sequentially immersing in active replenishing liquid and antitoxic modification liquid after immersion, and carrying out drying and roasting after the immersing. The regeneration method of the catalyst has good active recovery effect, the denitration efficiency reaches about 93%, and the specific surface area and compressive strength are increased.

Description

technical field [0001] The invention relates to the fields of prevention and control of air pollution and environmental protection, in particular to a method for regenerating a deactivated catalyst. Background technique [0002] Nitrogen oxides are one of the main components of air pollution and one of the three major air pollutants recognized. The photochemical smog formed by nitrogen oxides and hydrocarbons directly threatens human health. Nitrogen oxides are also responsible for the formation of acid rain and haze. One of the important reasons, but also produce a lot of secondary pollutants. However, the attention and research on nitrogen oxides at home and abroad are relatively late. How to effectively control the emission of nitrogen oxides has naturally become a research hotspot at home and abroad. Facing the serious threat of nitrogen oxides to the environment and human health and the fire Due to the grim situation of nitrogen oxide emissions from power plants, the s...

Claims

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Application Information

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IPC IPC(8): B01D53/96B01D53/56
Inventor 张亚平徐海涛王俊杰朱孝强沈凯宋静周长城
Owner 南京宇行环保科技有限公司
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