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Regeneration impregnation liquid and regeneration technology for vanadium-titanium corrugated plate type denitrification catalyst

A denitration catalyst and corrugated plate technology are applied in the field of regeneration dipping solution and regeneration process of vanadium-titanium series corrugated plate denitration catalysts, which can solve the problems of untargeted regeneration of corrugated plate catalysts and the like.

Inactive Publication Date: 2015-12-16
TIANHE BAODING ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing patents can regenerate the denitration catalyst to a certain extent, they are not specific to the regeneration of the corrugated plate catalyst

Method used

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  • Regeneration impregnation liquid and regeneration technology for vanadium-titanium corrugated plate type denitrification catalyst
  • Regeneration impregnation liquid and regeneration technology for vanadium-titanium corrugated plate type denitrification catalyst
  • Regeneration impregnation liquid and regeneration technology for vanadium-titanium corrugated plate type denitrification catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Select a deactivated vanadium-titanium series corrugated plate catalyst that has been used for two years in a power plant. The activity of the fresh catalyst is 93%, and the denitrification activity of the deactivated catalyst is reduced to 41%. The pore clogging rate of the above-mentioned corrugated plate catalyst reaches 31%. The size of the catalyst monomer is 46cm×23cm×60cm (length×width×height), and a section of the catalyst with the size of 15cm×15cm×30cm is cut off for simulated regeneration experiment.

[0049]The catalyst was purged with 0.2MPa compressed air for 1h; the purged catalyst module was calcined in a muffle furnace at a heating rate of 10°C / min, and calcined at 450°C for 2h; the calcined catalyst module was compressed with 0.2MPa Air was purged for 30 minutes; the catalyst module after secondary dedusting was ultrasonically cleaned for 20 minutes at an ultrasonic frequency of 15kHZ; The catalyst module was washed in the water washing tank for 30 mi...

Embodiment 2

[0053] Select a deactivated vanadium-titanium series corrugated plate catalyst that has been used for two years in a power plant. The activity of the fresh catalyst is 93%, and the denitrification activity of the deactivated catalyst is reduced to 41%. The pore clogging rate of the above-mentioned corrugated plate catalyst reaches 31%. The size of the catalyst monomer is 46cm×23cm×60cm (length×width×height), and a section of the catalyst with the size of 15cm×15cm×30cm is cut off for simulated regeneration experiment.

[0054] The catalyst was purged with 0.5MPa compressed air for 40min; the purged catalyst module was calcined in a muffle furnace at a heating rate of 10°C / min, and calcined at 500°C for 2h; the calcined catalyst module was fired with 1MPa compressed air Purge for 10 minutes; ultrasonically clean the catalyst module after secondary dust removal for 30 minutes, and the ultrasonic frequency is 20kHZ; then clean the catalyst module after ultrasonic treatment for 30...

Embodiment 3

[0058] Select a deactivated vanadium-titanium series corrugated plate catalyst that has been used for two years in a power plant. The activity of the fresh catalyst is 93%, and the denitrification activity of the deactivated catalyst is reduced to 41%. The pore clogging rate of the above-mentioned corrugated plate catalyst reaches 31%. The size of the catalyst monomer is 46cm×23cm×60cm (length×width×height), and a section of the catalyst with the size of 15cm×15cm×30cm is cut off for simulated regeneration experiment.

[0059] Blow the catalyst with 1MPa compressed air for 30min; calcinate the purged catalyst module in a muffle furnace at a heating rate of 10°C / min, and calcine at 550°C for 2h; blow the calcined catalyst module with 1MPa compressed air Sweep for 20 minutes; ultrasonically clean the catalyst module after secondary dust removal for 40 minutes, and the ultrasonic frequency is 32kHZ; then clean the catalyst module after ultrasonic treatment in a pickling pool fill...

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Abstract

The invention discloses a regeneration impregnation liquid and a regeneration technology for a vanadium-titanium corrugated plate type denitrification catalyst. The hole blocking rate of the denitrification catalyst treated with the treatment technology is reduced by more than 90%, and the denitrification activity of the regenerated catalyst is higher than 95% of that of a fresh catalyst. The difficulty in industrialization of the treatment technology is lower, and large-scale regeneration of inactive reproducible denitrification catalysts can be realized.

Description

technical field [0001] The invention relates to the technical field of catalyst regeneration, in particular to a regeneration impregnation solution and regeneration process for a vanadium-titanium corrugated plate denitration catalyst. Background technique [0002] Nitrogen oxides are one of the main pollutants in coal-fired boilers or coal-fired power plants, endangering people's physical and mental health. The use of denitrification catalysts can control the concentration of nitrogen oxide emissions below the national standard, making it an essential catalyst for the treatment of exhaust gas from coal-fired thermal power plants. However, due to the harmful substances such as dust, K, Na and heavy metals contained in the flue gas, with the prolongation of the use time, the pores of the denitration catalyst will be blocked or even poisoned, resulting in a decline in the denitrification efficiency. Generally, after 2-3 years of use of the denitration catalyst, a new catalyst...

Claims

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Application Information

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IPC IPC(8): B01J23/92
Inventor 於承志贾会珍莫士净鲁明月李庆丰王丽娜
Owner TIANHE BAODING ENVIRONMENTAL ENG
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