CN220303664U - Device for reducing CO content of sintering flue gas - Google Patents
Device for reducing CO content of sintering flue gas Download PDFInfo
- Publication number
- CN220303664U CN220303664U CN202321742799.2U CN202321742799U CN220303664U CN 220303664 U CN220303664 U CN 220303664U CN 202321742799 U CN202321742799 U CN 202321742799U CN 220303664 U CN220303664 U CN 220303664U
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- CN
- China
- Prior art keywords
- flue gas
- pipeline
- sintering
- sintering machine
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 239000003546 flue gas Substances 0.000 title claims abstract description 71
- 238000005245 sintering Methods 0.000 title claims abstract description 56
- 239000007789 gas Substances 0.000 claims abstract description 32
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 21
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 7
- 230000023556 desulfurization Effects 0.000 claims abstract description 7
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims description 19
- 239000000428 dust Substances 0.000 claims description 9
- 229910018657 Mn—Al Inorganic materials 0.000 claims description 6
- 229910000510 noble metal Inorganic materials 0.000 claims description 6
- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 21
- 239000002912 waste gas Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011278 co-treatment Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model discloses a device for reducing CO content of sintering flue gas, which belongs to the field of flue gas treatment of sintering machines and comprises a sintering machine, wherein a feeding device is arranged at the front end of the sintering machine, a combustion-supporting gas pipeline and a gas collecting pipeline are arranged above the head of the sintering machine, a plurality of gas collecting hoods are arranged below the sintering machine, and the gas collecting hoods positioned at the head and the middle tail of the sintering machine are connected with a high SO (sulfur dioxide) X Flue gas pipelineGas collecting hoods positioned at the middle part and the tail part of the sintering machine are connected with high NO X Flue gas pipeline, high NO X The flue gas pipeline is connected with the gas collecting pipeline through a three-way pipeline; high NO X The flue gas pipeline is sequentially connected with a denitration tower, a catalytic combustion chamber, a desulfurization tower and a chimney; high SO X The flue gas pipeline is connected with the catalytic combustion chamber, the desulfurizing tower and the chimney in sequence. On the basis of desulfurization and denitrification, the treatment of the sintering flue gas effectively removes CO, achieves higher purification efficiency, and reduces the flue gas treatment cost.
Description
Technical Field
The utility model relates to the field of flue gas treatment of sintering machines, in particular to a device for reducing the CO content of sintering flue gas.
Background
Sintering machines are common equipment in the production process of the steel industry, and waste gas containing carbon monoxide (CO) is generated in the operation process. Carbon monoxide is a toxic gas and has serious influence on the environment and human health. In order to reduce carbon monoxide emissions, most of the carbon monoxide in sintering machine exhaust gases is treated by catalytic combustion processes. In order to reduce the cost of the catalytic combustion process, the waste gas heat is recycled and utilized in the waste gas treatment process (especially, the temperature of the flue gas at the sintering tail end is 300-380 ℃), and the application provides a device for reducing the CO content of the sintering flue gas.
Disclosure of Invention
The object of the present utility model is to provide a device for reducing the CO content of sintering flue gases, solving the above mentioned problems.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model relates to a device for reducing CO content of sintering flue gas, which comprises a sintering machine, wherein a feeding device is arranged at the front end of the sintering machine, a combustion-supporting gas pipeline and a gas collecting pipeline are arranged above the head part of the sintering machine, a plurality of gas collecting hoods are arranged below the sintering machine, and the gas collecting hoods positioned at the head part and the middle tail part of the sintering machine are connected with a high SO (sulfur dioxide) X The gas collecting hoods positioned at the middle part and the tail part of the sintering machine are connected with a high NO X Flue gas duct, said high NO X The flue gas pipeline is connected with the gas collecting pipeline through a three-way pipeline; the high NO X The flue gas pipeline is sequentially connected with a denitration tower, a catalytic combustion chamber, a desulfurization tower and a chimney; the high SO X The flue gas pipeline is connected with the catalytic combustion chamber, the desulfurizing tower and the chimney in sequence.
Further, the high SO X Flue gas duct and high NO X And fans are arranged on the flue gas pipelines.
Further, a catalyst adding device is arranged at the top of the catalytic combustion chamber.
Further, the catalyst in the catalytic combustion chamber adopts a noble metal catalyst or a transition metal oxide catalyst.
Further, pd and Pt are adopted as the noble metal catalyst.
Further, the transition metal oxide catalyst adopts Co-Mn-Al and Cr-Mn-Al.
Further, the high SO X Flue gas duct and high NO X Electric dust collectors are arranged on the flue gas pipeline, wherein the high NO is contained in the flue gas pipeline X The electric dust collector on the flue gas pipeline is positioned at the front end of the three-way pipeline.
Compared with the prior art, the utility model has the beneficial technical effects that:
the device for reducing the CO content of the sintering flue gas comprises the steps of mixing combustion-supporting gas from the top of a sintering machine with high-temperature waste gas containing CO through a gas collecting pipeline, adding the mixed combustion-supporting gas into the sintering machine for high-temperature combustion, generating oxidation reaction, and generating harmless carbon dioxide (CO) 2 ) Finally by high SO X Desulfurizing and high-NO gas pipeline X The flue gas pipeline is used for denitration, and secondary oxidation reaction is carried out again through the catalytic combustion chamber, so that the content of CO is effectively removed; in addition, the gas in the catalytic combustion chamber directly enters from the high-temperature waste gas, so that a preheating flow is avoided, the cost and the working procedures are reduced, and the reaction is accelerated. In a word, on the basis of desulfurization and denitrification, the treatment of the sintering flue gas effectively removes CO, achieves higher purification efficiency, and reduces the flue gas treatment cost.
Drawings
The utility model is further described with reference to the following description of the drawings.
FIG. 1 is a block diagram of an apparatus for reducing CO content in sintering flue gas according to the present utility model;
reference numerals illustrate: 1. a sintering machine; 2. a charging device; 3. a fuel gas pipe; 4. a gas collecting pipe; 5. a gas collecting hood; 6. high SO X A flue gas duct; 7. high NO X A flue gas duct; 8. an electric dust removing device; 9. a blower; 10. a denitration tower; 11. a catalytic combustion chamber; 12. a catalyst adding device; 13. a desulfurizing tower; 14. and (5) a chimney.
Detailed Description
As shown in fig. 1, the device for reducing the CO content of sintering flue gas comprises a sintering machine 1, wherein a feeding device 2 is arranged at the front end of the sintering machine 1, and the feeding devices are arranged in a classified manner and can be used for simultaneously adding different raw materials. A gas-assisted pipeline 3 and a gas-collecting pipeline 4 are arranged above the head of the sintering machine 1. Wherein, the combustion-supporting gas pipeline 3 is used for adding oxygen to assist the fuel gas, so as to improve the combustion efficiency and the full rate.
A plurality of gas-collecting hoods 5 are arranged below the sintering machine 1, wherein the gas-collecting hoods 5 positioned at the head part and the middle tail part of the sintering machine 1 are connected with high SO X The flue gas pipeline 6, the gas collecting hoods 5 positioned at the middle part and the tail part of the sintering machine 1 are connected with high NO X Flue gas duct 7, said high NO X The flue gas pipeline 7 is connected with the gas collecting pipeline 4 through a three-way pipeline. Because the temperature of the middle part and the tail part flue gas of the sintering machine 1 is higher, especially the tail part flue gas is up to 300-380 ℃, the tail part flue gas is led into the gas collecting pipeline 4 to participate in combustion operation again, not only can the combustion efficiency be improved, but also the CO content can be effectively reduced in the combustion process, the CO content can be fully oxidized, the load of CO treatment in the subsequent waste gas is reduced, the recycling of the waste gas heat is realized, and the cost is saved.
The high NO X The flue gas pipeline 7 is sequentially connected with a denitration tower 10, a catalytic combustion chamber 11, a desulfurization tower 13 and a chimney 14; the high SO X The flue gas pipeline 6 is connected with a catalytic combustion chamber 11, a desulfurizing tower 13 and a chimney 14 in sequence.
And the high SOX flue gas pipeline 6 and the high NOX flue gas pipeline 7 are respectively provided with a fan 9 for accelerating the flow speed of the waste gas.
A catalyst adding device 12 is installed at the top of the catalytic combustion chamber 11. The catalyst in the catalytic combustor 11 is a noble metal catalyst or a transition metal oxide catalyst. Pd and Pt are adopted as the noble metal catalyst, and Co-Mn-Al and Cr-Mn-Al are adopted as the transition metal oxide catalyst.
The high SO X Flue gas duct 6 and high NO X The flue gas pipelines 7 are provided with electric dust collectors 8, wherein the high NO X The electric dust collector 8 on the flue gas pipeline 7 is positioned at the front end of the three-way pipeline.
The action process of the utility model is as follows:
firstly, flue gas generated by the combustion head part of the sintering machine 1 and flue gas generated by the middle tail part of the sintering machine contain a large amount of sulfur and part of CO, and the flue gas enters a catalytic combustion chamber 11 after dust removal; secondly, the flue gas temperature in the middle part and the tail part of the sintering machine 1 is higher, after dust removal, high-temperature flue gas containing a large amount of CO enters the sintering machine 1 again through a gas collecting pipeline 4 to be combusted together with combustion-supporting gas at high temperature, the carbon dioxide is formed through full oxidation reaction, and the waste gas after primary oxidation reaction enters a catalytic combustion chamber 11; finally, the waste gas in the catalytic combustion chamber 11 enters a desulfurizing tower 13 for desulfurization under the catalytic oxidation reaction, and finally the waste gas reaching the standard is discharged from a chimney 14.
The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.
Claims (7)
1. A device for reducing the content of CO in sintering flue gas, characterized in that: including sintering machine (1), the front end of sintering machine (1) is provided with feeding device (2), the head top of sintering machine (1) is provided with helping gas pipeline (3) and gas collecting channel (4), the below of sintering machine (1) is provided with a plurality of gas collecting channel (5), wherein the positionThe gas collecting hoods (5) at the head part and the middle tail part of the sintering machine (1) are connected with a high SO X A flue gas pipeline (6), and a gas collecting hood (5) positioned at the middle part and the tail part of the sintering machine (1) is connected with a high NO X -a flue gas duct (7), said high NO X The flue gas pipeline (7) is connected with the gas collecting pipeline (4) through a three-way pipeline; the high NO X The flue gas pipeline (7) is sequentially connected with a denitration tower (10), a catalytic combustion chamber (11), a desulfurization tower (13) and a chimney (14); the high SO X The flue gas pipeline (6) is sequentially connected with a catalytic combustion chamber (11), a desulfurizing tower (13) and a chimney (14).
2. The apparatus for reducing CO content of sintering flue gas according to claim 1, wherein: the high SO X Flue gas duct (6) and high NO X The flue gas pipelines (7) are provided with fans (9).
3. The apparatus for reducing CO content of sintering flue gas according to claim 1, wherein: the top of the catalytic combustion chamber (11) is provided with a catalyst adding device (12).
4. The apparatus for reducing CO content of sintering flue gas according to claim 1, wherein: the catalyst in the catalytic combustion chamber (11) adopts a noble metal catalyst or a transition metal oxide catalyst.
5. The apparatus for reducing CO content of sintering flue gas according to claim 4, wherein: pd and Pt are adopted as the noble metal catalyst.
6. The apparatus for reducing CO content of sintering flue gas according to claim 4, wherein: the transition metal oxide catalyst adopts Co-Mn-Al and Cr-Mn-Al.
7. The apparatus for reducing CO content of sintering flue gas according to claim 1, wherein: the high SO X Flue gas duct (6) and high NO X Electric dust collectors (8) are arranged on the flue gas pipelines (7), wherein the height is higher than the height of the flue gas pipelinesNO X An electric dust collector (8) on the flue gas pipeline (7) is positioned at the front end of the three-way pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321742799.2U CN220303664U (en) | 2023-07-05 | 2023-07-05 | Device for reducing CO content of sintering flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321742799.2U CN220303664U (en) | 2023-07-05 | 2023-07-05 | Device for reducing CO content of sintering flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220303664U true CN220303664U (en) | 2024-01-05 |
Family
ID=89352820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321742799.2U Active CN220303664U (en) | 2023-07-05 | 2023-07-05 | Device for reducing CO content of sintering flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220303664U (en) |
-
2023
- 2023-07-05 CN CN202321742799.2U patent/CN220303664U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |