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Movable cleaning and regenerating device and cleaning and regenerating method for SCR (selective catalytic reduction) denitration catalysts

A technology for denitrification catalysts and regeneration devices, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of increasing additional costs for cleaning and regeneration, easily damaged catalysts, and many personnel required , to achieve good cleaning and regeneration effects, avoid transportation damage, and achieve high equipment integration

Inactive Publication Date: 2013-01-09
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Off-line cleaning can thoroughly clean and regenerate the SCR denitrification catalyst. After regeneration, the activity of the catalyst is recovered to a high degree. However, the problem with this technology is that the catalyst needs to be disassembled and transported. The cycle is long, which increases the additional cost of cleaning and regeneration
Catalysts are easily damaged during disassembly and transportation

Method used

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  • Movable cleaning and regenerating device and cleaning and regenerating method for SCR (selective catalytic reduction) denitration catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] As shown in the drawings, this embodiment is a cleaning and regeneration method for a removable SCR denitration catalyst cleaning and regeneration device, the steps are as follows:

[0033] Step 1: Detection: Test the activity of the poisoned catalyst, and determine that the catalyst is deactivated by 80% or more, which is severe deactivation;

[0034] Step 2: Liquid preparation: Add oxalic acid solution, dispersant MF, ammonium metavanadate and ammonium metatungstate to the regeneration liquid container 1 to configure the regeneration liquid, and use an electric stirrer to stir for more than 10 minutes to obtain the regeneration liquid, in which the dispersant MF accounts for the regeneration liquid The weight percent of liquid is 1wt%, and the weight percent that ammonium metavanadate accounts for regeneration liquid is 10wt%, and the weight percent of ammonium paratungstate concentration accounts for regeneration liquid is 20wt%, and the pH value of regeneration liquid ...

Embodiment 2

[0044] As shown in the drawings, this embodiment is a cleaning and regeneration method for a removable SCR denitration catalyst cleaning and regeneration device, the steps are as follows:

[0045] Step 1: Detection: test the activity of the poisoned catalyst, and determine that the catalyst is 50%-80% deactivated, which is moderately deactivated;

[0046] Step 2: Liquid preparation: Add oxalic acid solution, dispersant MF, ammonium metavanadate and ammonium metatungstate to the regeneration liquid container 1 to configure the regeneration liquid, and use an electric stirrer to stir for more than 10 minutes to obtain the regeneration liquid, in which the dispersant MF accounts for the regeneration liquid The weight percent of liquid is 1wt%, and the weight percent that ammonium metavanadate accounts for regeneration liquid is 8wt%, and the weight percent of ammonium paratungstate concentration accounts for regeneration liquid is 18wt%, and the pH value of regeneration liquid is ...

Embodiment 3

[0056] As shown in the drawings, this embodiment is a cleaning and regeneration method for a removable SCR denitration catalyst cleaning and regeneration device, the steps are as follows:

[0057] Step 1: Detection: test the activity of the poisoned catalyst, and determine that the catalyst is deactivated by 50% or less, which is mild deactivation;

[0058] Step 2: Liquid preparation: Add oxalic acid solution, dispersant MF, ammonium metavanadate and ammonium metatungstate to the regeneration liquid container 1 to configure the regeneration liquid, and use an electric stirrer to stir for more than 10 minutes to obtain the regeneration liquid, in which the dispersant MF accounts for the regeneration liquid The weight percent of liquid is 1wt%, and the weight percentage that ammonium metavanadate accounts for regeneration liquid is 5wt%, and ammonium paratungstate concentration accounts for the weight percent of regeneration liquid is 15wt%, and the pH value of regeneration liqui...

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Abstract

Disclosed are a movable cleaning and regenerating device and a cleaning and regenerating method for SCR (selective catalytic reduction) denitration catalysts. The device comprises a soot blowing system, a cleaning and regenerating system and a drying and calcining system. The complete offline cleaning and regenerating system for the SCR catalysts is highly integrated to be mobile, can be transported to a user via railway or road traffic to clean the SCR catalysts according to the degree of catalyst poisoning, and the catalysts are regenerated by adding catalytic ingredients while sediments, pore blockage, alkali metal and other soluble toxic substances on surfaces of the catalysts are removed. The device and the method have the advantages that activity of the catalysts is improved, the service lives of the catalysts are prolonged, a full cleaning and regenerating process can be completed without long-distance transportation, the catalysts can be regenerated to the greatest extent, cleaning cycle of the catalysts is shortened, and cost is saved for the user of the SCR denitration catalysts.

Description

technical field [0001] The invention relates to the technical field of SCR denitration catalyst cleaning and regeneration, in particular to a movable SCR denitration catalyst cleaning and regeneration device and a cleaning and regeneration method. Background technique [0002] With the promulgation and implementation of the new version of "Emission Standards of Air Pollutants for Thermal Power Plants" during the "Twelfth Five-Year Plan" period, thermal power plants have increasingly stringent requirements for the control of nitrogen oxide emissions. How to effectively control the emission of nitrogen oxides has become the current environmental protection It is one of the important issues to be solved urgently in the field. Selective Catalytic Reduction (SCR for short) is currently the main technical approach for flue gas denitrification in thermal power plants, and the catalyst is the core of the SCR flue gas denitrification system. Due to fly ash wear, solid deposition, an...

Claims

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Application Information

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IPC IPC(8): B01J38/68
Inventor 赵钦新王飞王浩韦建军李钰鑫姜薇薇
Owner XI AN JIAOTONG UNIV
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