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A denitrification catalyst module box with ammonia adsorption function and preparation method thereof

A denitrification catalyst and ammonia adsorption technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., to achieve the effect of solving ammonia escape

Active Publication Date: 2021-12-28
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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  • A denitrification catalyst module box with ammonia adsorption function and preparation method thereof
  • A denitrification catalyst module box with ammonia adsorption function and preparation method thereof

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Experimental program
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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 denitration catalyst module box is composed of a module box base and a selective adsorption functional coating. The base of the module box is a hollow box with hollowed-out top and bottom surfaces, which can be loaded with denitration catalysts. The selective adsorption functional coating is a coating formed on the surface of the module box substrate by heat treatment after the module box substrate is coated with the 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 adsorbent active component Ce-Nb-Al-O x Composite oxide and adsorption aid Si-Fe-Ni-W-Mn-O x The mass ratio of the composite oxide is 1:0.05, the molar ratio of Ce / Nb / Al elements is 1:0.1:0.1, and the molar ratio of S...

Embodiment 2

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

[0051] The denitration catalyst module box is composed of a module box base and a selective adsorption functional coating. The base of the module box is a hollow box with hollowed-out top and bottom surfaces, which can be loaded with denitration catalysts. The selective adsorption functional coating is a coating formed on the surface of the module box substrate by heat treatment after the module box substrate is coated with the 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 adsorbent active component Ce-Nb-Al-O x Composite oxide and adsorption aid Si-Fe-Ni-W-Mn-O x The mass ratio of composite oxides is 1:0.25, the molar ratio of Ce / Nb / Al elements is 1:0.25:0.5, and the molar ratio of S...

Embodiment 3

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

[0068] The denitration catalyst module box is composed of a module box base and a selective adsorption functional coating. The base of the module box is a hollow box with hollowed-out top and bottom surfaces, which can be loaded with denitration catalysts. The selective adsorption functional coating is a coating formed on the surface of the module box substrate by heat treatment after the module box substrate is coated with the 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 adsorbent active component Ce-Nb-Al-O x Composite oxide and adsorption aid Si-Fe-Ni-W-Mn-O x The mass ratio of composite oxides is 1:0.5, the molar ratio of Ce / Nb / Al elements is 1:1:1, and the molar ratio of Si / Fe / M...

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Abstract

The invention discloses a denitrification catalyst module box with ammonia adsorption function and a preparation method thereof. The denitration catalyst module box is composed of a module box base body and a selective adsorption function coating; the module box base body is hollow with both the upper bottom surface and the lower bottom surface hollowed out The box body can be loaded with a denitration catalyst; the selective adsorption functional coating is a coating formed on the surface of the module box substrate by heat treatment after the module box substrate is coated with functional coating slurry; the functional coating slurry contains polytetrafluoroethylene powder , Adsorbent powder, stabilizer, diffusing agent, pore-forming agent, adsorbent powder includes adsorbent active component Ce‑Nb‑Al‑O x Composite oxides and adsorption aids Si‑Fe‑Ni‑W‑Mn‑O x composite oxides. The invention can not only load the denitrification catalyst module, but also help the flue gas pass through the denitrification catalyst evenly and remove the dust, and can also absorb the unreacted ammonia gas in the SCR reaction process, effectively prevent the ammonia from escaping, and help the unit to operate in the full load range Internal denitrification is of great significance.

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 areas, such as Beijing-Tianjin-Hebei, require NO x achieve lower emission concentrations. The Selective Catalytic Reduction (SCR) denitration technology is currently the most widely used denitration technology due to its high efficiency and no secondary pollution. With the large-scale ultra-low emission transformation of domestic coal-fired units, NO at the entrance of the denitration system x The concentration value ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/56
CPCB01D53/8631B01D2251/2062
Inventor 杨波
Owner NANJING KEYI ENVIRONMENTAL PROTECTION TECH
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