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Oxidation net capable of preventing ammonia escape and SCR (selective catalytic reduction) denitration device

An oxidation network and ammonia escape technology, applied in the field of SCR denitrification, can solve the problems of ammonia escape and achieve the effect of preventing secondary pollution

Inactive Publication Date: 2017-06-09
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of this application is to provide an oxidation net and SCR denitrification device to prevent ammonia from escaping, so as to solve the problem of ammonia escaping in the process of flue gas removal in the prior art

Method used

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  • Oxidation net capable of preventing ammonia escape and SCR (selective catalytic reduction) denitration device
  • Oxidation net capable of preventing ammonia escape and SCR (selective catalytic reduction) denitration device

Examples

Experimental program
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Embodiment 1

[0044] Such as figure 2 As shown, the SCR denitration device includes a flue 2, an ammonia injection grid 1, a denitration reactor 3, a rectifying plate 31, a catalyst bed 32, and an oxidation screen 4. The positional relationship of each component is as follows figure 2 above.

[0045] Among them, such as figure 1 As shown, the oxidation net 4 includes a plurality of mesh blocks 41 arranged in an array, and spacers 42 are arranged between the above-mentioned mesh blocks 41 of two adjacent rows and between the above-mentioned mesh blocks 41 of two adjacent columns. It includes a plurality of screens 410, the aperture of the screen is 5 mesh, the surface of the screen is attached with an oxidizing agent, and the oxidizing agent is an iron-titanium chelate, the screen is a carbon steel wire mesh, and the spacer is a carbon steel spacer. The total thickness is 5mm.

[0046] The flue gas is uniformly mixed with the ammonia gas sprayed from the ammonia injection grid 1 in the ...

Embodiment 2

[0048] The difference from Example 1 is that the aperture of the wire mesh is 2 meshes, the spacer is a stainless steel spacer, the wire mesh is a stainless steel wire mesh, and the total thickness of the mesh block is 15 mm.

Embodiment 3

[0050] The difference from Example 1 is that the aperture of the wire mesh is 10 meshes, the spacers are stainless steel spacers, the wire mesh is carbon steel wire mesh, and the total thickness of the mesh blocks is 10mm.

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Abstract

The invention provides an oxidation net capable of preventing ammonia escape and a SCR (selective catalytic reduction) denitration device. The oxidation net comprises at least one net block, and each net block comprises a silk net and an oxidant adsorbed on the surface of the silk net. When the oxidation net is applied in the SCR denitration device, nitric oxide reacts with ammonia through a catalyst to generate nitrogen and water, the rest ammonia is oxidized by the oxidant when passing the oxidation net, and a generated product is adsorbed on the silk nets, so that escaping ammonia is effectively controlled and prevented from escaping into atmosphere to cause secondary pollution to the atmosphere.

Description

technical field [0001] The present application relates to the field of SCR denitrification, and in particular, relates to an oxidation grid and an SCR denitrification device for preventing ammonia from escaping. Background technique [0002] Nitrogen oxides are a major environmental pollutant, most of which come from combustion emissions from power plants. [0003] At present, in order to avoid excessive discharge of nitrogen oxides into the atmosphere, power plants widely use the SCR flue gas denitrification process for denitrification. This method is that ammonia and nitrogen oxides undergo oxidation-reduction reactions on the surface of the catalyst to generate nitrogen and water. The reaction process No secondary pollutants are produced. [0004] In the actual process of the SCR flue gas denitrification process, a larger ammonia / nitrogen oxide ratio is required to achieve a more ideal nitrogen oxide reduction rate. Although the molar ratio of ammonia gas to nitrogen ox...

Claims

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Application Information

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IPC IPC(8): B01D53/82B01D53/58B01D53/75B01D53/90B01D53/56
CPCB01D53/58B01D53/75B01D53/82B01D53/8631B01D53/90B01D2251/10
Inventor 李瑞欣王仕龙王天堃张建生韩平郑少亮窦锡亭张新亮郭锦基繆明烽张有生
Owner CHNA ENERGY INVESTMENT CORP LTD