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Denitration catalyst used in waste incineration power plant and preparation method thereof

A denitration catalyst and waste incineration technology, applied in the field of denitration catalysts, can solve the problems of reducing the service life of the denitration catalyst, poisoning the SCR denitration catalyst, and unable to function for a long time, so as to be suitable for wide-scale popularization and application, increase the reaction activity, and improve the activity. and oxygen storage capacity

Inactive Publication Date: 2014-11-05
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A variety of pollutants are emitted from the exhaust gas of the incinerator, and the composition is extremely complex, which contains many greenhouse gases and toxic substances
Today's best incineration equipment, under normal operation, will release dozens of harmful substances, and it is difficult to purify them all only by filtration, water washing and adsorption
Especially dioxin pollutants can easily poison the existing SCR denitrification catalyst, reduce its activity or even deactivate it, making it unable to function for a long time, greatly reducing the service life of the denitrification catalyst and increasing the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A denitrification catalyst for waste incineration power plants provided in this embodiment is composed of raw materials in the following weight ratio, activated carbon: 70 parts, TiO 2 : 10 parts, copper salt: 1 part, iron salt: 3 parts, cerium salt: 3 parts, curing agent: 6 parts.

[0025] Among them, the curing agent is SiO 2 . The copper salt is at least one of copper nitrate, copper oxalate and copper chloride. The iron salt is iron nitrate. The cerium salt is at least one of cerium nitrate, cerium oxalate and cerium chloride.

[0026] This embodiment also provides a method for preparing the above-mentioned denitration catalyst for waste incineration power plants, including the following steps:

[0027] (1) Activated carbon pretreatment: Take a certain amount of activated carbon with a particle size of 100-150 mesh according to the weight ratio, place it in hydrochloric acid solution and heat it to reflux for 4 hours at a heating temperature of 60°C. After cooli...

Embodiment 2

[0032] A denitrification catalyst for waste incineration power plants provided in this example is composed of raw materials in the following weight ratio, activated carbon: 75 parts, TiO 2 : 12 parts, copper salt: 2 parts, iron salt: 5 parts, cerium salt: 5 parts, curing agent: 8 parts.

[0033] Among them, the curing agent is SiO 2 . The copper salt is at least one of copper nitrate, copper oxalate and copper chloride. The iron salt is iron nitrate. The cerium salt is at least one of cerium nitrate, cerium oxalate and cerium chloride.

[0034] This embodiment also provides a method for preparing the above-mentioned denitration catalyst for waste incineration power plants, including the following steps:

[0035] (1) Activated carbon pretreatment: Take a certain amount of activated carbon with a particle size of 100-150 mesh according to the weight ratio, place it in a hydrochloric acid solution and heat it to reflux for 5 hours at a heating temperature of 60°C. After cooli...

Embodiment 3

[0040] A denitrification catalyst for waste incineration power plants provided in this example is composed of raw materials in the following weight ratio, activated carbon: 72 parts, TiO 2 : 11 parts, copper salt: 1.5 parts, iron salt: 4 parts, cerium salt: 4 parts, curing agent: 7 parts.

[0041] Among them, the curing agent is SiO 2 . The copper salt is at least one of copper nitrate, copper oxalate and copper chloride. The iron salt is iron nitrate. The cerium salt is at least one of cerium nitrate, cerium oxalate and cerium chloride.

[0042] This embodiment also provides a method for preparing the above-mentioned denitration catalyst for waste incineration power plants, including the following steps:

[0043](1) Activated carbon pretreatment: Take a certain amount of activated carbon with a particle size of 100-150 mesh according to the weight ratio, place it in a hydrochloric acid solution and heat it to reflux for 5 hours at a temperature of 60°C. After cooling and ...

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Abstract

The invention discloses a denitration catalyst used in a waste incineration power plant. The catalyst is prepared from the following raw materials in parts by weight: 70-75 parts of active carbon, 10-12 parts of TiO2, 1-2 parts of copper salt, 3-5 parts of ferric salt, 3-5 parts of cerium salt and 6-8 parts of a curing agent. The invention also discloses a preparation method of the denitration catalyst, and the preparation method comprises the following steps: pretreating active carbon; preparing TiO2 slurry; preparing mixed slurry; and drying and roasting the mixed slurry to prepare the denitration catalyst. Compared with the prior art, the denitration catalyst disclosed by the invention has the advantages that the stability and catalytic performance of the catalyst are improved, the specific surface area of the catalyst is greatly enlarged, the reactivity of the catalyst is improved because the porous structure of dried and roasted active carbon is well developed, and the denitration efficiency is enhanced. In addition, due to the addition of a rare-earth element, cerium, the denitration catalyst is high in poison tolerance and quite applicable to the waste incineration power plant, and furthermore, the service life of the catalyst is greatly prolonged.

Description

technical field [0001] The invention relates to a denitration catalyst, in particular to a denitration catalyst for a waste incineration power plant and a preparation method thereof. Background technique [0002] In my country, harmful substances such as sulfur dioxide and nitrogen oxides are mainly produced by coal combustion. With the strengthening of my country's economic strength, power consumption will gradually increase. At present, my country has carried out large-scale flue gas desulfurization projects, but flue gas denitrification has not yet been carried out on a large scale. According to research data, if the control of nitrogen oxides in flue gas is not strengthened, the total amount of nitrogen oxides and the proportion of atmospheric pollutants will increase, and it is possible to replace sulfur dioxide as the main pollutant in the atmosphere. [0003] Among the various denitrification technologies at present, selective catalytic reduction denitrification (SC...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J32/00B01D53/56B01D53/86
Inventor 张庆丽刘江峰周冠辰徐辉常洁洁
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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