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Denitration catalyst module box with ammonia adsorption function and preparation method thereof

A denitration catalyst, ammonia adsorption technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc.

Active Publication Date: 2021-07-06
NANJING KEYI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention does not need to modify the existing equipment, can effectively solve the problem of ammonia escape in the SCR denitrification system, prevent ammonium bisulfate from blocking the air preheater, and is of great significance to realize the denitrification of the unit within the full load range

Method used

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  • Denitration catalyst module box with ammonia adsorption function and preparation method thereof
  • Denitration catalyst module box with ammonia adsorption function and preparation method thereof
  • Denitration catalyst module box with ammonia adsorption function and preparation method thereof

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Effect test

Embodiment 1

[0030] This embodiment provides a denitration catalyst module box with ammonia adsorption function and a preparation method thereof.

[0031] The denitrification catalyst module box is composed of a module box substrate and a selective adsorption function coating. The base of the module box is a hollow box with hollow upper and lower bottom surfaces, which can be loaded with denitrification catalysts. The selective adsorption functional coating is a coating formed on the surface of the module box base by heat treatment after the base of the module box is coated with a functional coating slurry.

[0032] The preparation method of the denitration catalyst module box comprises the following steps:

[0033] Step 1, preparation of adsorbent powder:

[0034] According to the active component of the adsorbent Ce-Nb-Al-O x Composite Oxide and Adsorption Auxiliary Si-Fe-Ni-W-Mn-O x The mass ratio of composite oxide is 1:0.05, the molar ratio of Ce / Nb / Al element is 1:0.1:0.1, and the ...

Embodiment 2

[0050] This embodiment provides a denitration catalyst module box with ammonia adsorption function and a preparation method thereof.

[0051] The denitrification catalyst module box is composed of a module box substrate and a selective adsorption function coating. The base of the module box is a hollow box with hollow upper and lower bottom surfaces, which can be loaded with denitrification catalysts. The selective adsorption functional coating is a coating formed on the surface of the module box base by heat treatment after the base of the module box is coated with a functional coating slurry.

[0052] The preparation method of the denitration catalyst module box comprises the following steps:

[0053] Step 1, preparation of adsorbent powder:

[0054] According to the active component of the adsorbent Ce-Nb-Al-O x Composite Oxide and Adsorption Auxiliary Si-Fe-Ni-W-Mn-O x The mass ratio of composite oxide is 1:0.25, the molar ratio of Ce / Nb / Al element is 1:0.25:0.5; the m...

Embodiment 3

[0067] This embodiment provides a denitration catalyst module box with ammonia adsorption function and a preparation method thereof.

[0068] The denitrification catalyst module box is composed of a module box substrate and a selective adsorption function coating. The base of the module box is a hollow box with hollow upper and lower bottom surfaces, which can be loaded with denitrification catalysts. The selective adsorption functional coating is a coating formed on the surface of the module box base by heat treatment after the base of the module box is coated with a functional coating slurry.

[0069] The preparation method of the denitration catalyst module box comprises the following steps:

[0070] Step 1, preparation of adsorbent powder:

[0071] According to the active component of the adsorbent Ce-Nb-Al-O x Composite Oxide and Adsorption Auxiliary Si-Fe-Ni-W-Mn-O x The mass ratio of composite oxide is 1:0.5, the molar ratio of Ce / Nb / Al element is 1:1:1; the molar r...

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Abstract

The invention discloses a denitration catalyst module box with an ammonia adsorption function and a preparation method of the denitration catalyst module box. The denitration catalyst module box is composed of a module box base body and a selective adsorption functional coating. The module box base body is a hollow box body with a hollow upper bottom surface and a hollow lower bottom surface, and can be used for loading a denitration catalyst; the selective adsorption functional coating is a coating formed on the surface of the module box base body through heat treatment after the module box base body is coated with functional coating slurry; and the functional coating slurry is prepared from polytetrafluoroethylene powder, adsorbent powder, a stabilizer, a dispersing agent and a pore forming agent, and the adsorbent powder is prepared from an adsorbent active component Ce-Nb-Al-Ox composite oxide and an adsorption auxiliary agent Si-Fe-Ni-W-Mn-Ox composite oxide. The denitration catalyst module can be loaded, flue gas can uniformly pass through a denitration catalyst, dust can be removed, unreacted ammonia gas in the SCR reaction process can be adsorbed, ammonia escape is effectively prevented, and the denitration catalyst module has great significance in denitration of a unit within the full-load range.

Description

technical field [0001] The invention belongs to the technical field of environmental protection catalytic materials and material processing, and relates to a denitration catalyst module box, in particular to a denitration catalyst module box with ammonia adsorption function and a preparation method thereof. Background technique [0002] Current coal-fired power plants NO x The emissions must meet the requirements of the air pollutant emission standards for thermal power plants. Generally, NO x The outlet concentration is controlled at 50mg / Nm 3 Below, some regions such as Beijing, Tianjin and Hebei require NO x achieve lower emission concentrations. The selective catalytic reduction (Selective Catalytic Reduction, SCR) denitrification technology is currently the most widely used denitrification technology due to its high efficiency and no secondary pollution. With the large-scale ultra-low emission transformation of domestic coal-fired units, the NOx at the inlet of the ...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/56
CPCB01D53/8631B01D2251/2062
Inventor 杨波
Owner NANJING KEYI ENVIRONMENTAL PROTECTION TECH
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