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A flue gas denitrification and decarbonization treatment system and method

A flue gas and denitrification technology, which is applied in the field of flue gas denitrification and decarbonization treatment system, 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: 2021-12-24
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 flue gas denitrification and decarbonization treatment system and method

Method used

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  • A flue gas denitrification and decarbonization treatment system and method
  • A flue gas denitrification and decarbonization treatment system and method
  • A flue gas denitrification and decarbonization treatment system and method

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Embodiment 1

[0107] Such as figure 1 As shown, a flue gas denitrification and decarbonization treatment 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 original flue gas delivery pipe L0 is connected to the flue gas inlet of the SCR reactor 3, and the first pipe L1 drawn from the flue gas outlet of the SCR reactor 3 is divided into a second pipe L2 and a third pipe L3, and the second pipe L2 and The third pipeline L3 is respectively connected to the main reaction tower 201 and the bypass 202 of the CO reactor 2 . The hot blast outlet of the hot blast stove 1 is connected to the second pipeline L2 via the fourth pipeline L4. 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

[0109] Example 1 is repeated, except that the system further includes a first valve k1 disposed on the second pipeline L2. The first valve k1 is located upstream of where the fourth pipeline L4 is connected to the second pipeline L2. The system also includes a second valve k2 arranged on the third line L3. The system also includes a gas delivery pipeline L10 connected to the supplementary gas inlet of the hot blast stove 1 . The system also includes a combustion-supporting gas delivery pipeline L11, which is connected to the supplementary combustion-supporting gas inlet of the hot blast stove 1 .

Embodiment 3

[0111] 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

A flue gas denitrification and decarbonization treatment system, the system includes a hot blast stove (1), a CO reactor (2), an SCR reactor (3); the CO reactor (2) includes a main reaction tower (201) and a bypass ( 202); the original flue gas delivery pipe (L0) is connected to the flue gas inlet of the SCR reactor (3), and the second pipe ( L2) and the third pipeline (L3), the second pipeline (L2) and the third pipeline (L3) are connected to the main reaction tower (201) and the bypass (202) of the CO reactor (2) respectively; ) of the hot air outlet is connected to the second pipeline (L2) via the fourth pipeline (L4). 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 flue gas denitrification and decarbonization treatment system and method, which belong 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 denitrification)...

Claims

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Application Information

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