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A system and method for removing carbon monoxide and denitrification from flue gas

A carbon monoxide and denitration technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of catalyst deactivation and poor sulfur resistance, and achieve the effect of reducing pollution and avoiding secondary pollution.

Active Publication Date: 2021-10-26
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 removing carbon monoxide and denitrification of flue gas

Method used

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  • A system and method for removing carbon monoxide and denitrification from flue gas
  • A system and method for removing carbon monoxide and denitrification from flue gas
  • A system and method for removing carbon monoxide and denitrification from flue gas

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Embodiment 1

[0102] Such as figure 1 As shown, a system for removing carbon monoxide and denitrification from flue gas, the system includes a hot blast stove 1, a CO reactor 2, and an SCR reactor 3. The CO reactor 2 includes a main reaction tower 201 and a bypass 202 . 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 bypass 202 of the CO reactor 2 . Both the third pipeline L3 drawn from the flue gas outlet of the main reaction tower 201 of the CO reactor 2 and the fourth pipeline L4 drawn from the bypass 202 of the CO reactor 2 are connected to the SCR reaction via the fifth pipeline L5 after being combined. Device 3. The hot blast outlet of the hot blast stove 1 is connected to the first pipeline L1 via the sixth pipeline L6. A second temperature detection device 8 is provided on the side wall of the main reaction tower 201 of the CO reactor 2 .

Embodiment 2

[0104] Embodiment 1 is repeated, except that the system further includes a first valve k1 arranged on the first pipeline L1. The first valve k1 is located upstream of the position where the sixth pipeline L6 is connected to the first pipeline L1. The system also includes a second valve k2 arranged on the second pipeline L2. The system also includes a gas delivery pipeline L9 connected to the supplementary gas inlet of the hot blast stove 1 . The system also includes a combustion-supporting gas delivery pipeline L10, which is connected to the supplementary combustion-supporting gas inlet of the hot blast stove 1 .

Embodiment 3

[0106] Such as figure 2 As shown, Example 2 is repeated, except that the system also includes a GGH heat exchanger 4 . The raw flue gas is connected to the flue gas inlet of the first heat exchange area 401 of the GGH heat exchanger 4 through pipes, and the flue gas outlet of the first heat exchange area 401 of the GGH heat exchanger 4 is connected to the raw flue gas transmission pipeline L0, and the SCR The net flue gas outlet of the reactor 3 is connected to the second heat exchange area 402 of the GGH heat exchanger 4 through the seventh pipe L7.

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Abstract

A system for removing carbon monoxide and denitrification from flue gas, the system includes a hot blast stove (1), a CO reactor (2), and an SCR reactor (3); ) and the second pipeline (L2) are respectively connected to the main reaction tower (201) and the bypass (202) of the CO reactor (2); The third pipeline (L3) of the CO reactor (2) and the fourth pipeline (L4) drawn from the bypass (202) of the CO reactor (2) are both connected to the SCR reactor (3) via the fifth pipeline (L5) after merging; The hot blast outlet of the hot blast stove (1) is connected to the first pipeline (L1) via the sixth pipeline (L6). 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 flue gas purification, in particular to a system and method for removing carbon monoxide and denitrification from flue gas, 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 reduction method denitrifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/56B01D53/62F23J15/08G01D21/02
CPCB01D53/864B01D53/8628B01D53/8631F23J15/08G01D21/02B01D2258/0283B01D2257/502B01D2257/40Y02A50/20
Inventor 叶恒棣魏进超康建刚刘昌齐
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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