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A CO oxidation synergistic denitrification system and method

A denitration and oxidation device technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as poor sulfur resistance and catalyst deactivation, and achieve the effect of reducing pollution and avoiding secondary pollution.

Active Publication Date: 2022-01-25
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A CO oxidation synergistic denitrification system and method
  • A CO oxidation synergistic denitrification system and method
  • A CO oxidation synergistic denitrification system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0106] Such as figure 1 As shown, a CO oxidation synergistic denitrification system includes a CO oxidation device 2 and an SCR reactor 3 . 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 first pipeline L1 and the second pipeline L2 branched from the raw flue gas transmission pipeline L0 are respectively connected to the main reaction tower 201 and the preheating chamber 202 of the CO oxidation device 2 . Both the third pipeline L3 drawn from the flue gas outlet of the main reaction tower 201 of the CO oxidation device 2 and the fourth pipeline L4 drawn from the preheating chamber 202 of the CO oxidation device 2 are connected to the SCR reactor 3. A ...

Embodiment 2

[0108] Repeat embodiment 1, only this system also comprises hot blast stove 1. The hot blast outlet of the hot blast stove 1 is connected to the raw flue gas delivery pipeline L0 via the sixth pipeline L6. The system also includes a gas delivery pipeline L8 connected to the supplementary gas inlet of the hot blast stove 1 . The system also includes a combustion-supporting gas delivery pipeline L9, and the combustion-supporting gas delivery pipeline L9 is connected to the combustion-supporting gas supplementary inlet of the hot blast stove 1 .

Embodiment 3

[0110] Embodiment 2 is repeated, except that the system further includes a first valve k1 arranged on the first pipeline L1. The system also includes a second valve k2 arranged on the second pipeline L2.

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Abstract

A CO oxidation synergistic denitrification system, the system includes a CO oxidation device (2), an SCR reactor (3); the CO oxidation device (2) includes an inner main reaction tower (201) and an outer preheating chamber ( 202); the first pipeline (L1) and the second pipeline (L2) separated from the original flue gas delivery pipeline (L0) are respectively connected to the main reaction tower (201) and the preheating chamber ( 202); the third pipeline (L3) drawn from the flue gas outlet of the main reaction tower (201) of the CO oxidation device (2) and the fourth pipeline drawn from the preheating chamber (202) of the CO oxidation device (2) (L4) Both are connected to the SCR reactor (3) via a fifth line (L5) after combining. The invention utilizes the heat released during the process of converting carbon monoxide into carbon dioxide to raise the temperature of the flue gas for denitrification treatment, saves the use of fuel, and avoids the problem that the CO catalyst is easily deactivated when encountering sulfur oxides in a low temperature state.

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 Patents(China)
IPC IPC(8): B01D53/75B01D53/62B01D53/86B01D53/56
CPCB01D53/75B01D53/62B01D53/8628B01D53/8631B01D2258/0283Y02A50/20
Inventor 叶恒棣魏进超刘昌齐康建刚
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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