A system and method for heat-exchanging flue gas decarbon monoxide and denitrification

A carbon monoxide, heat exchange technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of poor sulfur resistance, catalyst deactivation, etc., to reduce pollution, avoid secondary pollution, and avoid poisoning failure. Effect

Active Publication Date: 2022-06-07
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 heat-exchanging flue gas decarbon monoxide and denitrification
  • A system and method for heat-exchanging flue gas decarbon monoxide and denitrification
  • A system and method for heat-exchanging flue gas decarbon monoxide and denitrification

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Effect test

Embodiment 1

[0099] like figure 1 As shown, a system for decarbonating and denitrifying flue gas includes a hot air system 1 , a CO reactor 2 , and an SCR reactor 3 . The hot blast system 1 includes a hot blast stove 101 and a heat exchanger 102 . The CO reactor 2 includes a main reaction column 201 and a bypass 202 . The first pipe L1 and the second pipe L2 branched from the raw flue gas conveying pipe L0 are connected to the main reaction tower 201 and the bypass 202 of the CO reactor 2, respectively. Both the third pipe L3 drawn from the flue gas outlet of the main reaction tower 201 of the CO reactor 2 and the fourth pipe L4 drawn from the bypass 202 of the CO reactor 2 are connected to the SCR reaction via the fifth pipe L5 after being combined device 3. The sixth pipe L6 drawn from the hot air outlet of the hot blast stove 101 is connected to the first medium inlet of the heat exchanger 102 . The seventh pipe L7 drawn from the second medium outlet of the heat exchanger 102 is con...

Embodiment 2

[0101] Example 1 is repeated, except that the first medium outlet of the heat exchanger 102 is connected to the original flue gas conveying pipe L0 via the eighth pipe L8.

Embodiment 3

[0103] Example 2 is repeated, except that the system further includes a first valve k1 disposed on the first conduit L1. The first valve k1 is located upstream of where the seventh pipe L7 is connected to the first pipe L1. The system also includes a second valve k2 arranged on the second conduit L2. The system further includes a gas delivery pipeline L10 connected to the gas supplementary inlet of the hot blast stove 101 . The system further includes a combustion-supporting gas delivery pipeline L11 , which is connected to the combustion-supporting gas supplementary inlet of the hot blast stove 101 .

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Abstract

A system for removing carbon monoxide and denitrification from flue gas, the system includes a hot air system (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 sixth pipeline (L6) drawn from the hot blast outlet of the hot blast stove (101) is connected to the first medium inlet of the heat exchanger (102); the seventh pipeline (L7) drawn from the second medium outlet of the heat exchanger (102) ) is connected to the first pipeline (L1). The invention avoids the problem that the CO catalyst is easily deactivated when encountering sulfur oxides at low temperature, and simultaneously saves the use of fuel.

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 de-carbon monoxide and denitrification of flue gas, belonging 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 polynitrogen oxides are generated. Flue gas denitrification refers to the removal of the generated NO X revert to N 2 , so as to remove NO in the flue gas X According to the treatment process, it can be divided into wet denitrification and dry denitrification. Flue gas denitrification technology mainly includes dry method (selective catalytic reduction flue gas denitrification, selective non-catalytic reduction denitrification) and wet method. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/75B01D53/62B01D53/86B01D53/56F23J15/08
CPCB01D53/75B01D53/62B01D53/8628B01D53/8631F23J15/08B01D2258/0283Y02A50/20
Inventor 叶恒棣魏进超刘昌齐康建刚
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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