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Device and method for preparing titanium oxide nanorods by using waste denitration catalyst

A denitration catalyst and titanium oxide technology, applied in the field of denitration catalyst, can solve the problems of resource waste, environmental pollution, etc., and achieve the effects of improving the purging effect, reducing the excessive purging intensity, high efficiency and high value utilization.

Pending Publication Date: 2020-04-14
GUOHUI ENVIRONMENTAL PROTECTION NEW ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Waste SCR denitrification catalysts contain a large amount of valuable metal oxides, which have been included in hazardous solid waste (HW49 other wastes). If they are directly stacked, they will cause environmental pollution and waste of resources.

Method used

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  • Device and method for preparing titanium oxide nanorods by using waste denitration catalyst
  • Device and method for preparing titanium oxide nanorods by using waste denitration catalyst
  • Device and method for preparing titanium oxide nanorods by using waste denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] (1) Fix the denitration catalyst upright on the power-assisted manipulator of the compressed air purge device, and then purge it with compressed air at 0.5MPa for 60 minutes;

[0073] (2) Put the purged catalyst into a pickling device containing 50% acetic acid mass concentration for pickling for 6 hours, the volume ratio of the catalyst to the weak acid is 1:20; and use a constant temperature heating device to control the temperature at 30°C ;

[0074] (3) Put the acid-washed catalyst into a rinsing device for rinsing for 20 minutes, and then dry it at 110° C. for 2 hours;

[0075] (4) Put the dried catalyst into a crushing device and crush it through a 20mm sieve, then put it into a grinding device and grind it through a 200 μm sieve to obtain a catalyst powder;

[0076] (5) Put the catalyst powder obtained in step (4) into the first reaction kettle and wash it with 10% ammonia water, the mass ratio of the catalyst powder to ammonia water is 1:20, and then carry out ...

Embodiment 2

[0080] (1) Fix the denitration catalyst upright on the power-assisted manipulator of the compressed air purge device, and then purge it with compressed air at 1MPa for 30min;

[0081] (2) put the catalyst after purging into a pickling device containing citric acid mass concentration fraction of 5% for pickling for 12h, the volume ratio of the catalyst to the weak acid is 1:10; and use a constant temperature heating device to control the temperature at 50 ℃;

[0082] (3) Put the acid-washed catalyst into a rinsing device for rinsing for 30 minutes, and then dry it at 100° C. for 5 hours;

[0083] (4) Put the dried catalyst into a crushing device and crush it through a 20mm sieve, then put it into a grinding device and grind it through a 200 μm sieve to obtain a catalyst powder;

[0084] (5) Put the catalyst powder obtained in step (4) into the first reaction kettle and wash it with 25% ammonia water, the mass ratio of the catalyst powder to ammonia water is 1:5, and then carry...

Embodiment 3

[0088] (1) Fix the denitration catalyst upright on the power-assisted manipulator of the compressed air purge device, and then purge it with compressed air at 0.7MPa for 45min;

[0089] (2) the catalyst after purging is put into the pickling device that contains hydrobromic acid mass concentration fraction and carry out pickling 9h, the volume ratio of catalyst and weak acid is 1:15; And adopt constant temperature heating device to control temperature at 45°C;

[0090] (3) Put the acid-washed catalyst into a rinsing device for rinsing for 25 minutes, and then dry it at 105° C. for 3 hours;

[0091] (4) Put the dried catalyst into a crushing device and crush it through a 20mm sieve, then put it into a grinding device and grind it through a 200 μm sieve to obtain a catalyst powder;

[0092] (5) Put the catalyst powder obtained in step (4) into the first reaction kettle and wash it with 15% ammonia water, the mass ratio of the catalyst powder to ammonia water is 1:12, and then c...

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Abstract

The invention discloses a device for preparing titanium oxide nanorods by using a waste denitration catalyst, the device comprises a compressed air purging device, an acid washing device, a leaching device, a blast drying box, a crushing device, a grinding device and a stock bin which are sequentially connected through a transmission guide rail according to the preparation and processing sequenceof the titanium oxide nanorods, according to the method, the waste denitration catalyst is sequentially subjected to purging, acid pickling, leaching, drying, crushing, grinding and reacting through the transmission guide rail, and finally the titanium oxide nanorods are prepared from the denitration catalyst. According to the device and the method, the waste denitration catalyst is recycled, theblank of the relative industry is filled, the resource utilization rate is increased, and a new thought is provided for an efficient and high-value utilization mode of resources; automation is realized, the number of field operators is reduced, the production efficiency is improved, the production cost is reduced, and industrial production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of denitration catalysts, and in particular relates to a device and a preparation method for preparing titanium oxide nanorods by utilizing waste denitration catalysts. Background technique [0002] In recent years, my country's air pollutant emission standards have gradually become stricter, and denitrification and emission reduction work has been in full swing. Among the denitrification technologies, the selective catalytic reduction (SCR) method is widely used in various industrial flue gas denitrification processes such as coal-fired power plants in my country because of its high denitrification efficiency (up to 90%) and mature technology. Common commercial catalysts are honeycomb TiO 2 -V 2 o 5 -WO 3 / MoO 3 , where anatase TiO 2 as the carrier, V 2 o 5 is the active ingredient, WO 3 or MoO 3 For active and structural auxiliary. The flue gas denitrification system is generally arranged at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00B82Y40/00
CPCC01G23/053B82Y30/00B82Y40/00C01P2004/16Y02P20/584
Inventor 胡鹏龙烟征边福忠于经尧吕菲牟海峰毛敏捷刘欢
Owner GUOHUI ENVIRONMENTAL PROTECTION NEW ENERGY
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