Denitration catalyst regenerating solution and regenerating method thereof

A technology of denitration catalyst and regeneration liquid, applied in the field of denitration catalyst, can solve the problem of not better explaining the regeneration effect of the catalyst, and achieve the effects of avoiding unsafe factors and simple operation of the regeneration process

Active Publication Date: 2013-01-23
CHONGQING YUANDA CATALYST MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the above-mentioned patents do not better illustrate the catalyst regeneration effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Preparation of regeneration solution

[0018] 1. Preparation of cleaning solution

[0019] In the ultrasonic cleaning tank, a mixed solution with a mass fraction of emulsifier S-185 of 0.005% and a molar concentration of sulfuric acid of 0.8mol / L was configured. Ultrasonic treatment was carried out for 10 minutes to make it evenly mixed, and left to age for 1 hour, totaling 200L.

[0020] 2. Preparation of active replenishing liquid

[0021] In the activation pool, configure a mixed solution of vanadyl sulfate with a molar concentration of 0.8 mol / L and ammonium metatungstate of 0.8 mol / L. Perform mechanical stirring for 5 minutes to make it evenly mixed, and leave to age for 1 hour, totaling 200L.

[0022] 2. Denitrification catalyst regeneration process

[0023] Soak the spent catalyst in a cleaning pool filled with cleaning solution, and perform ultrasonic cleaning for 10 minutes; then, soak the catalyst in the active supplement solution for 60 minutes; ta...

Embodiment 2

[0025] 1. Preparation of regeneration solution

[0026] 1. Preparation of cleaning solution

[0027] In the ultrasonic cleaning pool, configure the mass fraction of emulsifier S-185 to be 1%, H 2 SO 4 A mixed solution with a molar concentration of 0.2mol / L. Ultrasonic treatment was carried out for 10 minutes to make it evenly mixed, and left to age for 1 hour to obtain a cleaning solution, totaling 200 L.

[0028] 2. Preparation of active replenishing liquid

[0029] In the activation pool, configure a mixed solution of vanadyl sulfate with a molar concentration of 0.2 mol / L and ammonium metatungstate of 0.2 mol / L. Perform mechanical stirring for 5 minutes to make it evenly mixed, and leave to age for 1 hour to obtain an active replenishing solution, 200 L in total.

[0030] 2. Denitrification catalyst regeneration process

[0031] Soak the spent catalyst in a cleaning tank filled with cleaning solution, and perform ultrasonic cleaning for 30 minutes; then, soak the ...

Embodiment 3

[0033] 1. Preparation of regeneration solution

[0034] 1. Preparation of cleaning solution

[0035] In the ultrasonic cleaning pool, configure the mass fraction of emulsifier S-185 to be 0.5%, H 2 SO 4 A mixed solution with a molar concentration of 0.4mol / L. Ultrasonic treatment was performed for 10 minutes to make it evenly mixed, and left to age for 1 hour, totaling 200L.

[0036] 2. Preparation of active replenishing liquid

[0037] In the activation pool, configure VOSO with a molar concentration of 0.8 mol / L 4 and a mixed solution of 0.8mol / L ammonium metatungstate. Perform mechanical stirring for 5 minutes to make it evenly mixed, and leave to age for 1 hour, totaling 200L.

[0038] 2. Denitrification catalyst regeneration process

[0039] Soak the spent catalyst in a cleaning tank filled with cleaning solution, and perform ultrasonic cleaning for 20 minutes; then, soak the catalyst in the active supplement solution for 30 minutes; take out the catalyst and p...

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PUM

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Abstract

The invention discloses a cellular denitration catalyst regenerating solution for a coal fired power plant and a regenerating method thereof. The regenerating solution comprises a cleaning solution and an activated replenishing solution, wherein the cleaning solution contains H2SO4 and an emulsifying agent S-185; the activated replenishing solution contains VOSO4 and ammonium paratungstate; and ultrasonic cleaning is adopted in the cleaning method. The regenerated catalyst has relative activity (K / Ko) of 0.95-0.99 and SO2 / SO3 conversion rates of both less than 1 percent and meets the requirement on the engineering; and the regenerating process is simple in operation and is suitable for industrialized massive regeneration.

Description

technical field [0001] The invention relates to the field of denitrification catalysts, in particular to a denitrification catalyst regeneration solution for coal-fired power plants and a regeneration method thereof. Background technique [0002] Recently, the Ministry of Environmental Protection announced the draft of the "Technical Policy on Nitrogen Oxide Prevention and Control in Thermal Power Plants", advocating comprehensive prevention and control measures that combine rational use of fuel with pollution control technology, combustion control technology and flue gas denitrification control technology. Reduce NOx emissions from coal-fired power plants. The opinion draft specifically proposes that "regeneration technology should be used as much as possible for spent catalysts, and spent catalysts that cannot be regenerated can be landfilled in accordance with the requirements of the "Safe Landfill Pollution Control Standard for Hazardous Wastes" (GB18598)." "Encourage hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/60B01J38/48B01D53/86B01D53/56
Inventor 黄锐刘伟刘显彬成丹魏丽斯刘红辉席文昌李云涛袁鹏黄新竹王雷张政科邓巧莲
Owner CHONGQING YUANDA CATALYST MFG
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