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Deactivated SCR denitration catalyst purging device, activation device and regeneration system and corresponding methods

A denitration catalyst and catalyst technology, which are applied in catalyst activation/preparation, catalyst regeneration/reactivation, chemical instruments and methods, etc., can solve the problems of increasing denitration costs, environmental pollution, and catalyst costs.

Inactive Publication Date: 2016-03-09
FUJIAN ZIJIN ENVIRONMENT ENG TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the mature and reliable selective catalytic reduction (SCR) denitrification technology, SCR denitrification technology has always occupied a large market share, but the cost of the catalyst is too high, and the service life of the general commercial catalyst is 3-5 years. Directly replacing the catalyst will greatly increase its denitrification cost, and at the same time, the waste catalyst produced will pollute the environment because it contains heavy metals and other components. Therefore, it is of great significance to study the regeneration of SCR denitrification catalysts.

Method used

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  • Deactivated SCR denitration catalyst purging device, activation device and regeneration system and corresponding methods
  • Deactivated SCR denitration catalyst purging device, activation device and regeneration system and corresponding methods
  • Deactivated SCR denitration catalyst purging device, activation device and regeneration system and corresponding methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0123] go through Figure 1-5 The method and system shown can achieve a denitrification activity of 18Nm / h and a specific surface area of ​​41.2m 2 The regeneration treatment of the catalyst (referred to as deactivated catalyst A) of / g:

[0124] (1) Place deactivated catalyst A in figure 2 In the purging device shown, a shock wave soot blower is used for purging, and the number of shock wave soot blowing is 7 times (among them, 4 times of soot blowing on both sides of the middle part, and 3 times of soot blowing on both sides of the upper part), with less soot blowing dead angle , It can blow out the stubborn dust, and then blow it with clean air with a pressure of 0.55MPa for 20 minutes;

[0125] (2) Place the catalyst after (1) treatment in image 3 In the airtight cleaning device shown, the microbubble burst impact cleaning method was used to clean for 22 minutes (wherein, the ultrasonic frequency is 35KHz, and the flow rate of the air pump is 0.6m 3 / h), and then use...

Embodiment 1-2

[0133] go through Figure 1-5 The method and system shown can achieve a denitrification activity of 18Nm / h and a specific surface area of ​​41.2m 2 The regeneration treatment of the catalyst (referred to as deactivated catalyst A) of / g:

[0134] (1) Place deactivated catalyst A in figure 1 In the purging device shown, the shock wave soot blower is used for blowing, and the number of shock wave soot blowing is 7 times (among which, the soot blowing on both sides of the middle part is 4 times, and the soot blowing on both sides of the upper part is 3 times), and then the pressure Blow with 0.55MPa clean air for 20 minutes;

[0135] (2) Place the treated catalyst in (1) in a cleaning device for ultrasonic cleaning for 20-50 min;

[0136] (3) drying the catalyst cleaned in (2) at 90° C. for 3 hours in the first drying device;

[0137] (4) Place the dried catalyst of (3) in a known active device, and regenerate it for 3 hours with the regeneration active solution;

[0138] (5...

Embodiment 2

[0143] go through Figure 1-5 The method and system shown can achieve a denitrification activity of 25Nm / h and a specific surface area of ​​37.8m 2 The regeneration treatment of the catalyst (referred to as deactivated catalyst B) of / g:

[0144] (1) Place deactivated catalyst B in figure 2 In the purging device shown, a shock wave soot blower is used for purging, and the number of shock wave soot blowing is 8 times (among them, 4 times of soot blowing on both sides of the middle part, and 4 times of soot blowing on both sides of the upper part), with less soot blowing dead angle , It can blow out the stubborn dust, and then blow it with clean air with a pressure of 0.45MPa for 15 minutes;

[0145] (2) Place the catalyst after (1) treatment in image 3 In the airtight cleaning device shown, the microbubble burst impact cleaning method was used to clean for 20 minutes (wherein, the ultrasonic frequency was 35KHz, and the flow rate of the air pump was 0.5m 3 / h), and then u...

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Abstract

The present invention relates to a deactivated SCR denitration catalyst purging device, an activation device and a regeneration system and corresponding methods, the activation device includes a regeneration main body tank, an ultrasonic atomization device, a catalyst rotating turntable and a micro negative pressure suction device; and the regeneration system includes the purging device, a cleaning device, a first drying device and the activation device which are connected in turn. The regeneration system can achieve deactivated catalyst regeneration, and compared with the normal regeneration process, the process is more thorough in purging and more complete in cleaning, also greatly improves the utilization ratio of a cleaning solution and a regeneration solution, and maximizes recovery of surface and pore structure of a deactivated catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalyst regeneration, and in particular relates to a purging device, an activation device, a regeneration system and a corresponding method for an inactivated SCR denitration catalyst. Background technique [0002] The rapid development of industrialization has also exacerbated the deterioration of the environment. Environmental problems such as smog are becoming more and more serious. With the implementation of the "Twelfth Five-Year Plan" emission reduction task, the national nitrogen oxide emission standards have become stricter, and the development of denitrification technology has been accelerated. . Due to the mature and reliable selective catalytic reduction (SCR) denitrification technology, SCR denitrification technology has always occupied a large market share, but the cost of the catalyst is too high, and the service life of the general commercial catalyst is 3-5 years. Directly replacing the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/96B01D53/56B01J38/00B01J38/66B01J37/06
CPCB01D53/565B01D53/96B01J37/06B01J38/00B01J38/48B01J38/60B01J38/66
Inventor 杨广华王洪明黄丽明余立清赖永花
Owner FUJIAN ZIJIN ENVIRONMENT ENG TECH
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