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System and method for CO oxidation synergistic denitration

A denitrification and oxidation device technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as poor anti-sulfur performance, catalyst deactivation, etc., to reduce pollution, avoid secondary pollution, and avoid easy loss live effect

Active Publication Date: 2021-02-26
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the denitrification process of flue gas in the prior art, it is necessary to heat up the flue gas through an external heating system before the denitrification process can be carried out; in the prior art, the carbon monoxide in the flue gas is not treated and discharged directly and carbon monoxide catalysts have poor sulfur resistance at low temperatures and easily lead to technical problems such as catalyst deactivation. The present invention proposes a system and method for CO oxidation synergistic denitrification

Method used

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  • System and method for CO oxidation synergistic denitration
  • System and method for CO oxidation synergistic denitration
  • System and method for CO oxidation synergistic denitration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] Such as figure 1 As shown, a CO oxidation synergistic denitrification system includes an SCR reactor 1 and a CO oxidation device 2 . The CO oxidation device 2 is a gas-solid indirect heat exchange tower with a shell-and-tube structure, wherein the inner layer is the main reaction tower 201 of the CO oxidation device 2 , and the outer layer is the preheating chamber 202 of the CO oxidation device 2 . The main reaction tower 201 of the CO oxidation device 2 is provided with a CO catalyst module 20101 . The original flue gas delivery pipeline L0 is connected to the flue gas inlet of the SCR reactor 1, and the second pipeline L2 and the third pipeline L3 are separated from the first pipeline L1 drawn from the flue gas outlet of the SCR reactor 1, and the second pipeline L2 and the The third pipeline L3 is respectively connected to the main reaction tower 201 and the preheating chamber 202 of the CO oxidation device 2 . A second temperature detection device 8 is provided o...

Embodiment 2

[0114] Repeat embodiment 1, only this system also comprises hot blast stove 3. The hot blast outlet of the hot blast stove 3 is connected to the first pipeline L1 via the fourth pipeline L4. The system also includes a gas delivery pipeline L10 connected to the supplementary gas inlet of the hot blast stove 3 . The system also includes a combustion-supporting gas delivery pipeline L11, and the combustion-supporting gas delivery pipeline L11 is connected to the combustion-supporting gas supplementary inlet of the hot blast stove 3 .

Embodiment 3

[0116] Example 2 is repeated, except that the fifth pipeline L5 is branched from the fourth pipeline L4 and connected to the original flue gas delivery pipeline L0. A third valve k3 is provided on the fourth pipeline L4. The third valve k3 is located downstream of the point where the fifth pipe L5 branches off from the fourth pipe L4. A fourth valve k4 is provided on the fifth pipeline L5.

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Abstract

The invention discloses a system for CO oxidation synergistic denitration. The system comprises an SCR reactor (1) and a CO oxidation device (2), wherein the CO oxidation device (2) is a gas-solid indirect heat exchange tower with a shell-and-tube structure, the inner layer is a main reaction tower (201) of the CO oxidation device (2), and the outer layer is a preheating chamber (202) of the CO oxidation device (2); wherein a raw flue gas conveying pipeline (L0) is connected to a flue gas inlet of the SCR reactor (1), a second pipeline (L2) and a third pipeline (L3) are separated from a firstpipeline (L1) led out from a flue gas outlet of the SCR reactor (1), and the second pipeline (L2) and the third pipeline (L3) are respectively connected to the main reaction tower (201) and the preheating chamber (202) of the CO oxidation device (2). According to the invention, the problem that a CO catalyst is easy to inactivate when meeting sulfur oxide in a low-temperature state is avoided, andmeanwhile, the use of fuel is saved.

Description

technical field [0001] The invention relates to a treatment system and a treatment method for removing carbon monoxide and denitrification of flue gas, in particular to a system and a method for synergistic denitrification of CO oxidation, and belongs to the technical fields of chemical industry and environmental protection. Background technique [0002] For industrial flue gas, especially for sintering machine flue gas in the iron and steel industry, flue gas denitrification technology is a flue gas purification technology applied to the chemical industry where multiple nitrogen oxides are generated. Flue gas denitrification refers to the removal of the generated NO X Revert to N 2 , so as to remove NO from the flue gas X According to the treatment process, it can be divided into wet denitrification and dry denitrification. Flue gas denitrification technologies mainly include dry method (selective catalytic reduction flue gas denitrification, selective non-catalytic redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/62B01D53/86B01D53/56
CPCB01D53/75B01D53/62B01D53/8631B01D53/8628B01D2257/502B01D2257/40B01D2256/22B01D2258/0283Y02A50/20
Inventor 叶恒棣魏进超康建刚刘昌齐
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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