A kind of scr catalyst harmless treatment method

A technology of SCR catalyst and harmless treatment, which is applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc. Large arable land, groundwater pollution and other problems, to achieve good results in terms of economy and energy saving

Active Publication Date: 2016-06-22
山西阳光日臻环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the large amount of discarded vanadium-tungsten SCR catalysts produced in my country every year, landfilling will occupy a large amount of cultivated land, and landfilling may also pollute groundwater, which violates the harmlessness, reduction and resource utilization of hazardous waste in my country. policy orientation

Method used

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  • A kind of scr catalyst harmless treatment method
  • A kind of scr catalyst harmless treatment method
  • A kind of scr catalyst harmless treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Take 1 waste vanadium-tungsten series SCR catalyst monomer, the pitch is 7.6, the longitudinal strength is 230N / cm 2 , the catalyst attaches some ash.

[0063] After testing, the ash composition is as follows:

[0064] Table 3 Example 1 Ash Component Analysis Table

[0065]

[0066] The catalyst composition is as follows:

[0067] Table 4 Example 1 Catalyst Component Analysis Table

[0068]

[0069] experiment analysis:

[0070] According to the analysis data of catalyst components and ash components, the ash content of the catalyst is characterized by high calcium oxide content. The water pressure of pressure cleaning is 1MPa, a small amount of hydrochloric acid is added to the soaking cleaning solution, and the liquid is circulated using compressed air. After soaking and cleaning, the cleaning solution is rinsed with 0.5MPa water, and the catalyst is dried in a box-type drying oven for 3 hours. The temperature was set at 80°C. The water mass fraction of th...

Embodiment 2

[0090] Take 1 waste vanadium-tungsten series SCR catalyst monomer, the pitch is 8.2, and the longitudinal strength is 260N / cm 2 , the catalyst attaches some ash.

[0091] After testing, the ash composition is as follows:

[0092] Table 5 Example 2 Ash Component Analysis Table

[0093]

[0094] The catalyst composition is as follows:

[0095] Table 6 Example 2 Catalyst Component Analysis Table

[0096]

[0097] experiment analysis:

[0098] According to the analysis data of catalyst components and ash components, the ash content of catalyst attachment is characterized by low calcium oxide content. The water pressure of pressure cleaning is 1.5MPa, add a small amount of hydrofluoric acid into the soaking cleaning solution, and use compressed air to make the liquid circulate. Dry for 3 hours with the temperature set at 90°C. The water mass fraction of the dried catalyst was controlled at 9%.

[0099] From the perspective of catalyst composition, TiO 2 High content, ...

Embodiment 3

[0117] Take 1 waste vanadium-tungsten series SCR catalyst monomer, the pitch is 10.0, the longitudinal strength is 280N / cm 2 , the catalyst attaches some ash.

[0118] After testing, the ash composition is as follows:

[0119] Table 7 Example 3 Ash Component Analysis Table

[0120]

[0121] The catalyst composition is as follows:

[0122] Table 8 Embodiment 3 Catalyst component analysis table

[0123]

[0124] experiment analysis:

[0125] According to the analysis data of catalyst components and ash components, the ash content of catalyst attachment is characterized by low calcium oxide content. The water pressure of pressure cleaning is 2.0MPa, a small amount of hydrofluoric acid is added to the soaking cleaning solution, and the liquid is circulated by using compressed air. Dry for 3 hours with the temperature set at 100°C. The water mass fraction of the dried catalyst was controlled at 9%.

[0126] From the perspective of catalyst composition, TiO 2 High cont...

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Abstract

The invention belongs to the technical field of environment friendliness and particularly relates to an SCR (Selective Catalytic Reduction) catalyst harmless treatment method. The method comprises the following steps: detecting components, pre-treating, drying, grinding, preparing materials (weighing), removing vanadium, carrying out solid-liquid separation, concentrating liquid, regenerating an SCR catalyst, drying solids and packaging. According to the method, the waste SCR catalyst containing toxic substances V2O5 reacts in a sealed container to generate a toxin-free VOC2O4 solution so that the harmlessness of dangerous wastes is realized; the treated waste SCR catalyst is common wastes and contains WO3 and TiO2, which have relatively high values so that the dangerous wastes are recycled; in a whole reaction process, no volatile gas is generated and influences on people and environments are not caused; and the toxin-free VOC2O4 generated by the reaction is a high-quality SCR catalyst regenerated active solution, and V2O5 and CO2 are generated again by vanadium oxalate in a drying process and no toxic and harmful gas is generated.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a harmless treatment method of an SCR catalyst. Background technique [0002] SCR (selective reduction denitrification) technology emerged from Japan in the 1980s, and was introduced in Europe and the United States in the 1990s. my country introduced SCR denitration technology from Japan and Europe and the United States in 2005. With the "Emission Standard of Air Pollutants for Thermal Power Plants GB13223-2011" The promulgation and implementation of the national thermal power units require flue gas denitrification. SCR denitrification technology is currently the mainstream technology for flue gas denitrification. The vanadium-tungsten SCR catalyst is a key component of the SCR system. The national thermal power units will use 700,000 cubic meters of vanadium-tungsten SCR catalysts, 100,000 tons of discarded vanadium-tungsten-based SCR catalysts will be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00C07C51/41C07C55/07B01J38/68
CPCY02P20/584
Inventor 徐斌徐必华史建文孔强马长山王宏盛徐小悟马琳娜
Owner 山西阳光日臻环保科技有限公司
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