CN114807482A - Total oxygen combustion system for adjusting combustion temperature by using carbon dioxide - Google Patents
Total oxygen combustion system for adjusting combustion temperature by using carbon dioxide Download PDFInfo
- Publication number
- CN114807482A CN114807482A CN202210499406.3A CN202210499406A CN114807482A CN 114807482 A CN114807482 A CN 114807482A CN 202210499406 A CN202210499406 A CN 202210499406A CN 114807482 A CN114807482 A CN 114807482A
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- CN
- China
- Prior art keywords
- blast furnace
- combustion
- gas
- valve
- carbon dioxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 66
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 48
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000001301 oxygen Substances 0.000 title claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 26
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 24
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 37
- 230000001105 regulatory effect Effects 0.000 claims description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 20
- 239000003546 flue gas Substances 0.000 claims description 20
- 239000000446 fuel Substances 0.000 claims description 15
- 230000008676 import Effects 0.000 claims description 6
- 239000003034 coal gas Substances 0.000 claims description 2
- 239000003517 fume Substances 0.000 claims 1
- 239000000779 smoke Substances 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/002—Evacuating and treating of exhaust gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
A total oxygen combustion system for adjusting combustion temperature by using carbon dioxide comprises a blast furnace, a hot blast furnace, an exhaust fan, an oxygen generator and a smoke purifier, wherein the hot blast furnace is connected with the blast furnace, a gas inlet of the hot blast furnace is communicated with a gas pipe of the blast furnace through a pipeline, an air inlet of the hot blast furnace is respectively communicated with an outlet of the exhaust fan and an outlet of the oxygen generator through a tee joint, an inlet of the exhaust fan is communicated with an outlet of the smoke purifier, an inlet of the smoke purifier is communicated with an air inlet pipe of a chimney, and an air inlet of the chimney is respectively communicated with an air outlet of the hot blast furnace through the air inlet pipe; the invention has simple structure, novel and unique design, simplicity and practicality, reduces the discharge amount of carbon dioxide, saves energy, protects environment and has good social and economic benefits.
Description
Technical Field
The invention relates to a combustion system, in particular to a total oxygen combustion system for regulating combustion temperature by using carbon dioxide.
Background
The combustion of blast furnace hot blast stove is carried out by taking solid fuel, liquid fuel or gas fuel as fuel and using air to support combustion. However, the combustion mode can discharge a large amount of carbon dioxide, seriously pollutes the environment and enhances the greenhouse effect, and when the heat value of the gas fuel is insufficient, high heat value gas is also needed, so that the cost is increased; if oxy-fuel combustion is used, the combustion temperature is too high. Therefore, under the condition of ensuring normal production, how to reduce the emission of carbon dioxide and ensure the combustion temperature required by production is a technical problem to be solved urgently.
Disclosure of Invention
In view of the above situation, the present invention aims to provide a total oxygen combustion system using carbon dioxide to adjust the combustion temperature, which can reduce the emission of carbon dioxide and control the combustion of the combustion temperature, and can effectively solve the problem of the existing blast furnace hot blast stove that the emission of carbon dioxide is large.
In order to achieve the purpose, the invention adopts the technical scheme that the total oxygen combustion system for adjusting the combustion temperature by using the carbon dioxide comprises a blast furnace, a hot blast furnace, an exhaust fan, an oxygen generator and a flue gas purifier, wherein the hot blast furnace is connected with the blast furnace, a gas inlet of the hot blast furnace is communicated with a gas pipe of the blast furnace through a pipeline, an air inlet of the hot blast furnace is respectively communicated with an outlet of the exhaust fan and an outlet of the oxygen generator through a tee joint, an inlet of the exhaust fan is communicated with an outlet of the flue gas purifier, an inlet of the flue gas purifier is communicated with an air inlet pipe of a chimney, and an air inlet of the chimney is respectively communicated with an air outlet of the hot blast furnace through the air inlet pipe.
The invention has simple structure, novel and unique design, simplicity and practicality, reduces the discharge amount of carbon dioxide, saves energy, protects environment and has good social and economic benefits.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings and examples.
Given in combination with the attached drawing, a total oxygen combustion system with carbon dioxide regulation combustion temperature, including blast furnace 1, hot-blast furnace 2, air exhauster 15, oxygenerator 10 and flue gas purifier 17, hot-blast furnace 2 link to each other with blast furnace 1, the coal gas import of hot-blast furnace 2 is linked together through pipeline and blast furnace gas pipe, the air intlet of hot-blast furnace 2 is linked together with the export of air exhauster 15 and oxygenerator 10 respectively through the tee bend, the export intercommunication of 15 imports of air exhauster and flue gas purifier 17, the import of flue gas purifier 17 is linked together with chimney 19's intake pipe, chimney 19's air inlet is linked together with hot-blast furnace 2's gas outlet respectively through the intake pipe.
In order to ensure better implementation effect, one end of a blast furnace gas inlet pipe of the hot blast furnace 2, which is close to the hot blast furnace 2, is sequentially provided with a gas combustion valve 3, a gas stop valve 4, a gas regulating valve 5 and a gas flowmeter 6.
A combustion-supporting air combustion valve 7, a combustion-supporting air adjusting valve 8 and a flue gas flowmeter 9 are sequentially arranged at one end, close to the hot blast stove 2, of a pipeline between a combustion-supporting gas inlet of the hot blast stove 2 and the exhaust fan 15; a flow meter 11, an oxygen regulating valve 12 and an air shutoff valve 13 are sequentially arranged on a pipeline between the oxygen generator 10 and the tee joint.
And a flue valve 20 is arranged at one end of the outlet pipeline at the lower part of the hot blast stove 2, which is close to the hot blast stove 2.
And a flue gas regulating valve 18 is arranged on a pipeline close to an air inlet of the chimney 19 at the joint of the flue gas purifier 17 and an air inlet pipe of the chimney 19.
A first regulating valve 16 and a second regulating valve 21 are arranged on a pipeline between the exhaust fan 15 and the smoke purifier 17.
And a blow-off valve 22 is arranged at one end of the pipeline between the hot blast stove 2 and the tee joint, which is close to the tee joint.
And a fan cut-off valve 14 is arranged on a pipeline between the exhaust fan 15 and the tee joint, is closed when the fan is started, and is opened to enter normal operation after the fan is normally started.
The hot blast stove 2 is provided with two, three or four (3 in the embodiment). As shown in FIG. 1, three hot blast stoves A, B, C adopt two-burning one-feeding, air supply for 60 minutes, furnace burning for 110 minutes, and furnace changing for 10 minutes. A. B, burning, A furnace is firstly burnt, B furnace is burnt for 55 minutes later, and C air supply is carried out. At the beginning, the air is used for conventional combustion, A, B combustion, C air supply, A air supply change, B continuous combustion and C air supply change.
A blast furnace 1 (heat source user) is connected with a combustion furnace 2, blast furnace gas (fuel station), an oxygen generator 10 and an exhaust fan 15 are all connected with a burner of the combustion furnace 2, and the blast furnace gas, the oxygen generator 10 and the exhaust fan 15 are respectively provided with a control valve for respectively controlling the respective consumption; the flue gas is introduced into a chimney 19, before being introduced into the chimney 19, a part of the flue gas is introduced into a flue gas purifier 17, and the purified flue gas is introduced into an exhaust fan 15. A circulating system is formed, so that the emission of carbon dioxide in the flue gas is reduced; blast furnace gas provides fuel, oxygen generator 10 provides oxygen for combustion, and exhaust fan 15 extracts flue gas for increasing the amount of flue gas to adjust the combustion temperature. The combustion temperature and heat required by the user can be ensured by adjusting the respective valves of the blast furnace gas, the oxygen generator 10 and the exhaust fan 15.
When the invention is used (C furnace) in concrete, the combustion changes the air supply): when the fan is started, the first regulating valve 16 is closed, the second regulating valve 21 is opened, and the fan is started by air; after starting, the second regulating valve 21 is opened, the first regulating valve 16 is closed, the flue gas is used instead, and the first regulating valve 16 is regulated to a required position. Opening the first regulating valve 16, the oxygen regulating valve 12 and the air cut-off valve 13, regulating the first regulating valve 16, the second regulating valve 21 and the oxygen regulating valve 12 to enable the oxygen content in the combustion-supporting air to meet the specified requirements of combustion, sampling from the bleeding valve 22, and checking whether the specified requirements of combustion are met; after the oxygen content in the combustion-supporting air meets the requirement, the flue valve 20 is opened, the combustion-supporting air combustion valve 7, the gas combustion valve 3 and the gas cut-off valve 4 are opened, the air regulating valve 8 and the gas regulating valve 5 are regulated to the required positions, and the bleeding valve 22 is closed to enter normal combustion. If the combustion temperature is higher or lower, the gas regulating valve 5, the combustion-supporting air regulating valve 8, the oxygen regulating valve 12 and the first regulating valve 16 are adjusted to be fine-tuned until the requirements are met.
The invention is not only suitable for the hot blast stove, but also can be used for other high-temperature kilns.
The invention has simple structure and novel and unique design, and compared with the prior art, the invention has the following advantages:
1、CO 2 can be recycled and can reduce CO 2 The discharge amount is more than 30%;
2. the combustion temperature can be increased, the requirement of the hot blast stove on high air temperature can be met by using pure blast furnace gas, high-calorific-value gas is not required to be added, and the combustion temperature is adjusted by using carbon dioxide;
3. the combustion-supporting method has the advantages that the combustion is supported by air, the nitrogen content in the combustion-supporting gas is low, and the nitrogen oxides in the product are reduced according to the collision theory. Therefore, the discharge amount of nitrogen oxides is reduced, the energy is saved, the environment is protected, and good social and economic benefits are achieved.
It should be noted that the present invention relates only to the flow of the combustion period, and therefore the air supply period is not described herein again, and the above embodiment only shows 3 hot blast stoves, 2 combustion, and 1 air supply, and if 4 hot blast stoves, 2 combustion, and 2 air supply.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention in any way, and it will be apparent to those skilled in the art that variations and modifications can be made in the above disclosed embodiments without departing from the scope of the invention.
Claims (9)
1. The utility model provides a total oxygen combustion system with carbon dioxide regulation combustion temperature, includes blast furnace (1), hot-blast furnace (2), air exhauster (15), oxygenerator (10) and gas purifier (17), a serial communication port, hot-blast furnace (2) link to each other with blast furnace (1), the coal gas import of hot-blast furnace (2) is linked together through pipeline and blast furnace gas pipe, the air intlet of hot-blast furnace (2) is linked together through the tee bend respectively with air exhauster (15) export and oxygenerator (10) export, the export intercommunication of air exhauster (15) import and gas purifier (17), the import of gas purifier (17) is linked together with the intake pipe of chimney (19), the air inlet of chimney (19) is linked together with the gas outlet of hot-blast furnace (2) respectively through the intake pipe.
2. The oxy-fuel combustion system for regulating combustion temperature by using carbon dioxide as claimed in claim 1, characterized in that a gas combustion valve (3), a gas shut-off valve (4), a gas regulating valve (5) and a gas flowmeter (6) are sequentially arranged on one end of a blast furnace gas inlet pipe of the hot blast furnace (2) close to the hot blast furnace (2).
3. The oxy-fuel combustion system for adjusting the combustion temperature by using carbon dioxide as claimed in claim 1, wherein a combustion-supporting air combustion valve (7), a combustion-supporting air adjusting valve (8) and a flue gas flowmeter (9) are sequentially arranged on one end of a pipeline between a combustion-supporting gas inlet of the hot blast stove (2) and the exhaust fan (15), which is close to the hot blast stove (2); a flow meter (11), an oxygen regulating valve (12) and an air stop valve (13) are sequentially arranged on a pipeline between the oxygen generator (10) and the tee joint.
4. Oxy-fuel combustion system with carbon dioxide regulation of the combustion temperature according to claim 1, characterized in that the outlet duct of the lower part of the hot blast stove (2) is equipped with a flue valve (20) at the end close to the hot blast stove (2).
5. The oxy-fuel combustion system for regulating combustion temperature with carbon dioxide as claimed in claim 1, wherein a flue gas regulating valve (18) is installed on the flue gas purifier (17) near the inlet duct of the chimney (19) where it is connected to the inlet duct of the chimney (19).
6. Oxy-fuel combustion system with carbon dioxide regulation of the combustion temperature according to claim 1, characterized in that the pipe between the suction fan (15) and the fume purifier (17) is equipped with a first regulation valve (16) and a second regulation valve (21).
7. The oxy-fuel combustion system for regulating the combustion temperature with carbon dioxide as claimed in claim 1, characterized in that a blow-off valve (22) is mounted on the end of the pipeline before the hot blast stove (2) and the tee near the tee.
8. The oxy-fuel combustion system for regulating the combustion temperature with carbon dioxide as claimed in claim 1, characterized in that a blower shut-off valve (14) is installed on the pipeline between the blower (15) and the tee.
9. Oxy-fuel combustion system with carbon dioxide regulated combustion temperature according to claim 1 characterized by the fact that said stove (2) is provided with at least two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210499406.3A CN114807482A (en) | 2022-05-09 | 2022-05-09 | Total oxygen combustion system for adjusting combustion temperature by using carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210499406.3A CN114807482A (en) | 2022-05-09 | 2022-05-09 | Total oxygen combustion system for adjusting combustion temperature by using carbon dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114807482A true CN114807482A (en) | 2022-07-29 |
Family
ID=82513953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210499406.3A Pending CN114807482A (en) | 2022-05-09 | 2022-05-09 | Total oxygen combustion system for adjusting combustion temperature by using carbon dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114807482A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718077A (en) * | 2021-09-27 | 2021-11-30 | 郑州豫兴热风炉科技有限公司 | Flue gas recycling system capable of realizing micro-emission of hot blast stove |
-
2022
- 2022-05-09 CN CN202210499406.3A patent/CN114807482A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718077A (en) * | 2021-09-27 | 2021-11-30 | 郑州豫兴热风炉科技有限公司 | Flue gas recycling system capable of realizing micro-emission of hot blast stove |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220729 |
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