Denitration catalyst regenerating solution and regenerating method thereof

A technology for 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: 2011-05-18
CHONGQING YUANDA CATALYST MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the above-mentioned patents do not be

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] 1. Preparation of regenerated liquid

[0021] 1. Preparation of cleaning fluid

[0022] In the ultrasonic cleaning tank, a mixed solution with a mass fraction of 0.005% of emulsifier S-185 and a molar concentration of sulfuric acid of 0.8 mol / L is configured. Carry out ultrasonic treatment for 10 minutes to make it evenly mixed and leave it to age for 1 hour, totaling 200L.

[0023] 2. Preparation of active supplement

[0024] In the activation tank, a mixed solution of 0.8mol / L vanadyl sulfate and 0.8mol / L ammonium metatungstate is configured. Perform mechanical stirring for 5 minutes to make it evenly mixed, and leave to age for 1 hour, totaling 200L.

[0025] 2. Denitration catalyst regeneration process

[0026] Soak the waste catalyst in a cleaning tank filled with cleaning solution for ultrasonic cleaning for 10 minutes; then, immerse the catalyst in the activity supplement solution for 60 minutes; take out the catalyst and place it in a drying box and...

Example Embodiment

[0028] Example 2

[0029] 1. Preparation of regenerated liquid

[0030] 1. Preparation of cleaning fluid

[0031] In the ultrasonic cleaning tank, the mass fraction of emulsifier S-185 is 1%, H 2 SO 4 A mixed solution with a molar concentration of 0.2mol / L. Carry out ultrasonic treatment for 10 minutes to make it evenly mixed, and leave to age for 1 hour to obtain a cleaning solution, totaling 200L.

[0032] 2. Preparation of active replenisher

[0033] In the activation cell, a mixed solution of 0.2 mol / L vanadyl sulfate and 0.2 mol / L ammonium metatungstate is prepared. Perform mechanical stirring for 5 minutes to make it evenly mixed, and leave to age for 1 hour to obtain an active replenisher, totaling 200L.

[0034] 2. Denitration catalyst regeneration process

[0035] Soak the waste catalyst in a cleaning tank filled with cleaning liquid for ultrasonic cleaning for 30 minutes; then, immerse the catalyst in the activity supplement liquid for 20 minutes; take the catalyst out an...

Example Embodiment

[0036] Example 3

[0037] 1. Preparation of regenerated liquid

[0038] 1. Preparation of cleaning fluid

[0039] In the ultrasonic cleaning tank, the mass fraction of emulsifier S-185 is 0.5%, H 2 SO 4 A mixed solution with a molar concentration of 0.4mol / L. Carry out ultrasonic treatment for 10 minutes to make it evenly mixed, and leave to age for 1 hour, totaling 200L.

[0040] 2. Preparation of active replenisher

[0041] In the activation cell, configure VOSO with a molar concentration of 0.8 mol / L 4 And 0.8mol / L ammonium metatungstate mixed solution solution. Perform mechanical stirring for 5 minutes to make it evenly mixed, and leave to age for 1 hour, totaling 200L.

[0042] 2. Denitration catalyst regeneration process

[0043] Soak the waste catalyst in a cleaning tank filled with cleaning liquid for ultrasonic cleaning for 20 minutes; then, immerse the catalyst in the activity supplement liquid for 30 minutes; take out the catalyst and place it in a drying box and dry at ...

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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. [0002] Background technique [0003] 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)." "En...

Claims

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Application Information

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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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