Hazardous waste incineration denitration catalyst and preparation method thereof

A denitration catalyst, hazardous waste technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem that the mechanical strength of the catalyst is difficult to support the catalytic work, the influence of the mechanical strength of the catalyst, and the reduction of the catalytic efficiency of the catalyst, etc. problem, to achieve good application prospects, good mechanical properties, and the effect of preventing corrosion

Pending Publication Date: 2020-10-30
HUBEI ZHONGYOU YOUYI ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the treatment process, there will be some substances that can poison the catalyst in the exhaust gas, and these substances will combine with the active components of the catalyst, so that the active components cannot work normally with nitrogen oxides and reduce the catalytic efficiency of the catalyst. The catalyst needs to be cleaned and regenerated after a certain period of use. Conventional cleaning methods include water washing and pickling. Pickling has a high efficiency and can improve the activity of the catalyst.
However, pickling will also affect the mechanical strength of the catalyst itself. After a certain number of pickling, the mechanical strength of the catalyst will be difficult to support its normal catalytic work.

Method used

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  • Hazardous waste incineration denitration catalyst and preparation method thereof
  • Hazardous waste incineration denitration catalyst and preparation method thereof
  • Hazardous waste incineration denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Configure titanate coupling agent solution:

[0027] Mix titanate coupling agent TC-F of Tianchen Chemical and acetone at a volume ratio of 1:10 and stir evenly to obtain a titanate coupling agent.

[0028] Immerse 100 parts of quartz fiber in 55 parts of titanate coupling agent, after immersion treatment for 1 hour, dry to obtain modified quartz fiber, respectively add 40 parts of modified quartz fiber, 20 parts of TiO 2 , 5 copies of WO 3 , 5 copies of V 2 o 5 After mixing with 5 parts of hydroxymethylcellulose ammonium, put it into a kneader, add 80 parts of water, and stir for 1 hour at a speed of 100r / min to obtain a mixed slurry. After stirring, put the mixed slurry into the extrusion Extrude in the machine, dry the extruded green body at 50°C for 20 hours, and then calcinate at 150°C for 10 hours. The number is 100 mesh powder, mix 80 parts of the sieved powder with 5 parts of α-alumina whiskers, 20 parts of γ-alumina powder and 5 parts of clay, put it into t...

Embodiment 2

[0030] Configure titanate coupling agent solution:

[0031] Mix and stir the titanate coupling agent TC-2 of Tianchen Chemical and acetone according to the volume ratio of 1:100 to obtain the titanate coupling agent.

[0032] Immerse 100 parts of quartz fiber in 1515 parts of titanate coupling agent, after immersion treatment for 1-2h, dry to obtain modified quartz fiber, respectively add 50 parts of modified quartz fiber, 30 parts of TiO 2 , 10 copies of WO 3 , 10 copies of V 2 o 5 After mixing with 15 parts of hydroxypropyl methylcellulose ammonium, put it into a kneader, add 90 parts of methanol, and stir at a speed of 300r / min for 1 hour to obtain a mixed slurry. After stirring, put the mixed slurry into Extruded in an extruder, dried the extruded green body at 100°C for 10 hours, and then calcined at 300°C for 5 hours. After the calcination, the first green body was obtained, which was crushed and sieved Take the 200-mesh powder, mix 100 parts of the sieved powder wit...

Embodiment 3

[0034] Configure titanate coupling agent solution:

[0035] Mix and stir the titanate coupling agent TC-27 of Tianchen Chemical and acetone according to the volume ratio of 1:50 to obtain the titanate coupling agent.

[0036] Immerse 100 parts of quartz fiber in 550 parts of titanate coupling agent, after immersion treatment for 1.5h, dry to obtain modified quartz fiber, respectively add 45 parts of modified quartz fiber, 25 parts of TiO 2 , 8 copies of WO 3 , 7 copies of V 2 o 5 After mixing with 10 parts of epoxy resin, put it into a kneader, add 85 parts of ethanol, and stir at a speed of 200r / min for 1.5h to obtain a mixed slurry. After stirring, put the mixed slurry into an extruder Extrusion molding, drying the extruded embryo body at 80°C for 15 hours, and then calcining at 200°C for 7 hours after drying, the first embryo body is obtained after the calcination is completed, the first embryo body is crushed and sieved, and the mesh size is 180 mesh powder, mix 90 par...

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Abstract

The invention provides a hazardous waste incineration denitration catalyst and a preparation method thereof. Raw materials of the denitration catalyst comprise: modified quartz fibers, TiO2, WO3, V2O5, a first adhesive, alpha-aluminum oxide whiskers, gamma-aluminum oxide powder, a second adhesive and a solvent; the preparation method comprises the following steps: mixing the modified quartz fibers, the TiO2, the WO3, the V2O5, the first adhesive and the solvent to prepare first powder; crushing and sieving the first powder, mixing the first powder with the alpha-aluminum oxide whiskers, the gamma-aluminum oxide powder, the second adhesive and the solvent, extruding and sintering to obtain the catalyst. The catalyst not only has good catalytic efficiency, but also has good mechanical properties, still has good mechanical properties and catalytic properties even after long-term use and acid pickling, and has good application prospects.

Description

technical field [0001] The invention relates to the technical field of waste treatment, in particular to a hazardous waste incineration denitrification catalyst and a preparation method thereof. Background technique [0002] Flue gas denitrification technology is also a post-combustion nitrogen oxide control technology, which is a technology that converts nitrogen oxides generated during combustion into nitrogen or other harmless substances. At present, the technical means of flue gas denitrification mainly include selective non-catalytic reduction method and selective catalytic reduction method. Among them, selective catalytic reduction method has high denitrification efficiency and low reaction temperature, so it is widely used in many coal-fired power plants and hazardous waste Dealing with industry. [0003] The technical core of the selective catalytic reduction method is the catalyst. Through the interaction between the active components in the catalyst and the nitrog...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J35/04B01J37/00B01J37/08B01D53/86B01D53/56
CPCB01J23/30B01J23/002B01J37/0018B01J37/08B01D53/8628B01D2258/0283B01J2523/00B01J35/56B01J2523/31B01J2523/41B01J2523/47B01J2523/55B01J2523/69Y02A50/20
Inventor 王腾周鹏陈涛陈辉宇汤凯李鑫徐雁斌
Owner HUBEI ZHONGYOU YOUYI ENVIRONMENTAL PROTECTION SCI & TECH
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