CN113357931A - Low NOx combustion device of gas flame furnace with smoke self-suck back function - Google Patents
Low NOx combustion device of gas flame furnace with smoke self-suck back function Download PDFInfo
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- CN113357931A CN113357931A CN202110550696.5A CN202110550696A CN113357931A CN 113357931 A CN113357931 A CN 113357931A CN 202110550696 A CN202110550696 A CN 202110550696A CN 113357931 A CN113357931 A CN 113357931A
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- combustion
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- supporting air
- flue gas
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 39
- 239000000779 smoke Substances 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 73
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000003546 flue gas Substances 0.000 claims abstract description 63
- 230000008602 contraction Effects 0.000 claims abstract description 23
- 238000010992 reflux Methods 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229940110728 nitrogen / oxygen Drugs 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
Abstract
The invention provides a low NOx combustion device of a gas flame furnace with self-suck-back smoke, belonging to the technical field of industrial energy conservation and environmental protection. The device comprises a gas channel, a combustion-supporting air channel, a flue gas backflow channel, a gas/air premixing channel and a swirler, wherein the annular combustion-supporting air channel is sleeved on the periphery of the central gas channel and has a contraction-expansion structure; one end of the flue gas backflow channel is open and connected with the hearth, the other end of the flue gas backflow channel is connected with the throat section of the combustion-supporting air channel, suction force is generated through negative pressure difference between the contraction pipe section and the hearth, high-temperature flue gas forms self circulation between the hearth and the combustor, the high-temperature flue gas is mixed with combustion-supporting air through the backflow channel, the oxygen concentration of the combustion-supporting air is diluted, and the temperature of the combustion-supporting air is increased; the flue gas return channel is tangent with the combustion-supporting air channel in the same direction. The device is in the furnace flue gas from the resorption can effectively promote combustion-supporting wind temperature, reduces the oxygen concentration limit of combustion process, realizes the stable high-efficient burning under the low oxygen concentration condition when reducing the original output of NOx.
Description
Technical Field
The invention relates to the technical field of industrial energy conservation and environmental protection, in particular to a low NOx combustion device of a gas flame furnace with self-suction smoke.
Background
Increasingly stringent environmental standards place increasing demands on industrial kiln clean production. Gas flame furnace operating temperature represented by blast furnace/coke oven/converter gas, mixed gas, natural gas and other gas fuelsHigh NO content up to 1000 deg.C, and large amount of NO produced and discharged during combustionxBecoming the main source of industrial pollution at present. The technical guideline for ultralow emission modification of iron and steel enterprises indicates that source control is strengthened, and low-nitrogen combustion technologies such as staged combustion, flue gas circulating combustion, flameless combustion and the like are encouraged. Therefore, development with low NOxThe high-efficiency combustion technology of the high-temperature metallurgical process taking combustion as the core is the key point of deep treatment of industrial pollution and sustainable development of energy environment.
The low NOx combustion principle mainly comprises flue gas circulation combustion, fuel/air staged combustion, premixed combustion, cyclone combustion and the like. The method is characterized in that the method effectively dilutes the oxygen concentration in combustion-supporting air, improves the mixing uniformity of fuel/air, reduces the original NOx production in the combustion process, and improves the flame combustion stability and the temperature distribution uniformity in a hearth, thereby improving the material heating effect and realizing energy conservation and emission reduction at the source. However, the current flue gas circulating combustion mainly adopts an external circulating mode, an induced draft device is required to be additionally arranged, so that the temperature of the flue gas is reduced, water vapor in the flue gas is easy to condense and separate out, equipment is corroded, and the operation and maintenance cost is high.
Therefore, it is urgently needed to develop a novel burner structure to realize self-suction of flue gas of a gas flame furnace, and low NOx combustion is realized under various high-temperature complex variation working conditions by flexibly adjusting a flue gas flow field and a reflux ratio/circulation rate, so that an innovative solution is provided for green transformation and upgrading of high-temperature metallurgical industries such as steel and the like.
Disclosure of Invention
The invention provides a low NOx combustion device of a gas flame furnace, aiming at the problems of NOx generation and high emission concentration in the combustion process of the high-temperature (more than 1000 ℃) gas flame furnace, wherein flue gas self-resorption is realized; the backflow flue gas can reduce the oxygen content of combustion-supporting air and improve the temperature of the combustion-supporting air, a local high-temperature high-oxygen area in the combustion process is avoided, the waste heat of the high-temperature flue gas is effectively utilized, and the energy efficiency is improved while the original generation amount of NOx is reduced.
The device comprises a gas channel, a combustion-supporting air channel, a flue gas backflow channel, a gas/air premixing channel and a swirler, wherein the gas channel is positioned in the center of the device, the combustion-supporting air channel is arranged at the periphery of the gas channel, one end of the flue gas backflow channel is open and connected with a hearth, the other end of the flue gas backflow channel is connected with a throat section of the combustion-supporting air channel, the gas/air premixing channel is positioned in the center of the device, the gas/air premixing channel is a junction of the gas channel and one end of the combustion-supporting air channel, and the swirler is positioned in the gas/air premixing channel.
The combustion-supporting air channel is of a contraction-expansion pipeline structure and comprises a combustion-supporting air channel contraction pipe section and a combustion-supporting air channel expansion pipe section, the outlet of the combustion-supporting air channel expansion pipe section is a gas/air premixing channel, the combustion-supporting air channels are uniformly and symmetrically distributed around the gas channel, and the number of the combustion-supporting air channels is not less than two. The combustion-supporting air channels are connected with the flue gas backflow channels one by one and are uniformly distributed on the circumference taking the fuel gas channel as the center of a circle in a concentric circle mode.
The number of the flue gas backflow channels is the same as that of the combustion-supporting air channels, the flue gas backflow channels are connected with the contraction pipe sections of the combustion-supporting air channels in a tangential mode in the same direction, flue gas self-suck back in the hearth is further promoted through gas jet, and air is prevented from entering the flue gas backflow channels.
The combustion-supporting air channel is of a contraction-expansion structure, the inner diameter ratio of the contraction pipe/expansion pipe and the length of the contraction pipe can be set according to the combustion process, and the contraction pipe/expansion pipe is the key for adjusting the smoke entrainment and the nitrogen/oxygen concentration ratio of combustion-supporting air; in order to realize low NOx combustion, the smoke reflux amount of the smoke reflux channel is not less than 50% of the combustion-supporting air quantity.
The gas channel inclines upwards theta towards the opening of the gas/air premixing channelr＝5～15°。
The expanding pipe section of the combustion-supporting air channel is inclined downwards theta towards the opening of the gas/air premixing channelz＝5～15°。
The inner diameter ratio of the combustion-supporting air channel contraction pipe section to the combustion-supporting air channel expansion pipe section is 1: (3-5).
The length of the combustion-supporting air channel contraction pipe section is 3-5 times of the length of the combustion-supporting air channel expansion pipe section.
The technical scheme of the invention has the following beneficial effects:
in the above scheme, the device has ingenious design and strong operability, and realizes the self-suck-back of high-temperature flue gas in the hearth by forming negative pressure at the throat with the fastest flow rate in the combustor. On one hand, the automatic backflow of the flue gas is mixed with the combustion-supporting air, so that the oxygen content in the combustion-supporting air is effectively reduced, the temperature of the combustion-supporting air is uniformly increased, the local high-temperature and high-oxygen in the combustion process is avoided, and the original generation amount of NOx can be remarkably reduced; on the other hand, the automatic back suction of the high-temperature flue gas in the hearth fully utilizes the waste heat of the combustion flue gas, avoids the heat loss caused by the external circulation of the flue gas, can effectively improve the fuel utilization efficiency, and provides an innovative solution for the clean and efficient utilization and green transformation of energy in the high-temperature metallurgy industry.
Drawings
FIG. 1 is a cross-sectional view of a low NOx combustion device of a gas fired flamer with self-return flue gas draw of the present invention;
fig. 2 is a view from a-a of fig. 1.
Wherein: 1-a gas channel; 2-combustion-supporting air channel contraction pipe section; 3-expanding the pipe section of the combustion-supporting air channel; 4-flue gas return channel; 5-a gas/air premixing channel; 6-cyclone.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a low NOx combustion device of a gas flame furnace, which can automatically suck flue gas back.
As shown in fig. 1 and fig. 2, the device includes a gas channel 1, a combustion-supporting air channel, a flue gas backflow channel 4, a gas/air premixing channel 5 and a swirler 6, the gas channel 1 is located in the center of the device, the combustion-supporting air channel is arranged at the periphery of the gas channel 1, one end of the flue gas backflow channel 4 is open and connected with a hearth, the other end of the flue gas backflow channel is connected with a throat section of the combustion-supporting air channel, the gas/air premixing channel 5 is located in the center of the device, the gas/air premixing channel 5 is a junction of the gas channel 1 and one end of the combustion-supporting air channel, and the swirler 6 is located inside the gas/air premixing channel 5.
The combustion-supporting air channel is of a contraction-expansion pipeline structure and comprises a combustion-supporting air channel contraction pipe section 2 and a combustion-supporting air channel expansion pipe section 3, the outlet of the combustion-supporting air channel expansion pipe section 3 is a gas/air premixing channel 5, the combustion-supporting air channels are uniformly and symmetrically distributed around the gas channel 1, and the number of the combustion-supporting air channels is not less than two. In the specific design process, 8 combustion-supporting air channels are arranged, and each combustion-supporting air channel comprises a combustion-supporting air channel contraction pipe section 2 and a combustion-supporting air channel expansion pipe section 3.
The number of the flue gas backflow channels 4 is the same as that of the combustion-supporting air channels, namely 8 flue gas backflow channels 4 are arranged in the same way and are uniformly distributed on the outer side of the contraction pipe section 2 of the combustion-supporting air channels in a concentric circle mode; one end of each flue gas backflow channel 4 is communicated with the hearth, the other end of each flue gas backflow channel is connected with the combustion-supporting air channel contraction pipe section 2, and the connection mode is homodromous and tangential, so that air is prevented from entering the backflow channels.
The combustion-supporting air channel generates a suction force through the local negative pressure of the contraction pipeline 2, so that the high-temperature combustion flue gas automatically flows back; the flue gas reflux amount and the nitrogen/oxygen concentration ratio of combustion-supporting air can be adjusted by the inner diameter ratio of the contraction pipe/the expansion pipe and the length of the contraction pipe, and the flue gas reflux amount of the flue gas reflux channel 4 is not less than 50% of the combustion-supporting air amount.
Combustion-supporting air enters the gas/air premixing channel 5 through the combustion-supporting air channel contraction pipe section 2 and the combustion-supporting air channel expansion pipe section 3, and the combustion-supporting air channel expansion pipe section 3 inclines downwards theta towards the opening of the gas/air premixing channel 5z＝5～15°。
The gas channel 1 is inclined upwards theta towards the opening of the gas/air premixing channel 5r＝5～15°。
The inner diameter ratio of the combustion-supporting air channel contraction pipe section 2 to the combustion-supporting air channel expansion pipe section 3 is 1: (3-5).
The length of the combustion-supporting air channel contraction pipe section 2 is 3-5 times of the length of the combustion-supporting air channel expansion pipe section 3.
In the device, one end of a flue gas backflow channel is connected with a hearth, the other end of the flue gas backflow channel is connected with a combustion-supporting air channel shrinkage pipe, and the negative pressure difference between the shrinkage pipe section and the hearth is used as a driving force to enable high-temperature flue gas in the hearth to be self-sucked; the flue gas return channel is tangent with the combustion-supporting air channel in the same direction, so that air is prevented from entering the return channel, the self-suck-back intensity and the backflow amount of the flue gas are further increased through gas jet, and the oxygen concentration of the combustion-supporting air is effectively diluted.
The opening of the central gas channel connected with the gas/air premixing channel is inclined upwards by 5-15 degrees, the opening of the combustion-supporting air channel connected with the gas/air premixing channel is inclined downwards by 5-15 degrees, and the gas and the combustion-supporting air are mixed by opposite impact enhancement; and a swirler is arranged in the gas/air premixing channel, and the uniform mixing degree of gas and combustion air is further improved through mechanical stirring.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides a low NOx burner of gas flame stove that flue gas is from resorption which characterized in that: the device comprises a gas channel (1), a combustion-supporting air channel, a flue gas backflow channel (4), a gas/air premixing channel (5) and a swirler (6), wherein the gas channel (1) is positioned at the center of the device, the combustion-supporting air channel is arranged at the periphery of the gas channel (1), one end of the flue gas backflow channel (4) is opened and connected with a hearth, the other end of the flue gas backflow channel is connected with a throat section of the combustion-supporting air channel, the gas/air premixing channel (5) is positioned at the center of the device, the gas/air premixing channel (5) is a junction of the gas channel (1) and one end of the combustion-supporting air channel, and the swirler (6) is positioned inside the gas/air premixing channel (5).
2. The low NOx combustion device of a gas fired flamethrower with self-suck back of flue gas of claim 1, wherein: the combustion-supporting air channel is of a contraction-expansion pipeline structure and comprises a combustion-supporting air channel contraction pipe section (2) and a combustion-supporting air channel expansion pipe section (3), the outlet of the combustion-supporting air channel expansion pipe section (3) is a gas/air premixing channel (5), the combustion-supporting air channels are uniformly and symmetrically distributed around the gas channel (1), and the number of the combustion-supporting air channels is not less than two.
3. The low NOx combustion device of a gas fired flamethrower with self-suck back of flue gas of claim 1, wherein: the number of the flue gas backflow channels (4) is the same as that of the combustion-supporting air channels, the flue gas backflow channels (4) are connected with the combustion-supporting air channel contraction pipe sections (2) in a tangential mode in the same direction, flue gas self-suck back in a hearth is further promoted through gas jet, and air is prevented from entering the flue gas backflow channels (4).
4. The low NOx combustion device of a gas fired flamethrower with self-suck back of flue gas of claim 1, wherein: the smoke reflux quantity of the smoke reflux channel (4) is not less than 50% of the combustion-supporting air quantity.
5. The low NOx combustion device of a gas fired flamethrower with self-suck back of flue gas of claim 1, wherein: the gas channel (1) inclines upwards theta towards the opening of the gas/air premixing channel (5)r＝5～15°。
6. The low NOx combustion device of a gas fired flamethrower with self-suck back of flue gas of claim 1, wherein: the combustion-supporting air channel expansion pipe section (3) inclines downwards theta towards the opening of the gas/air premixing channel (5)z＝5～15°。
7. The low NOx combustion device of a gas fired flamethrower with self-suck back of flue gas of claim 1, wherein: the inner diameter ratio of the combustion-supporting air channel contraction pipe section (2) to the combustion-supporting air channel expansion pipe section (3) is 1: (3-5).
8. The low NOx combustion device of a gas fired flamethrower with self-suck back of flue gas of claim 1, wherein: the length of the combustion-supporting air channel expansion pipe section (3) is 3-5 times of the length of the combustion-supporting air channel contraction pipe section (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110550696.5A CN113357931A (en) | 2021-05-17 | 2021-05-17 | Low NOx combustion device of gas flame furnace with smoke self-suck back function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110550696.5A CN113357931A (en) | 2021-05-17 | 2021-05-17 | Low NOx combustion device of gas flame furnace with smoke self-suck back function |
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| CN113357931A true CN113357931A (en) | 2021-09-07 |
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| CN202110550696.5A Pending CN113357931A (en) | 2021-05-17 | 2021-05-17 | Low NOx combustion device of gas flame furnace with smoke self-suck back function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216135A (en) * | 2021-12-01 | 2022-03-22 | 北京科技大学 | Based on CO2Circulating natural gas pure oxygen combustion zero-emission combustion system |
| CN115011363A (en) * | 2022-06-21 | 2022-09-06 | 中冶焦耐(大连)工程技术有限公司 | Vertical flame path structure of combustion chamber with low nitrogen emission |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1151311A (en) * | 1997-07-31 | 1999-02-26 | Mitsubishi Heavy Ind Ltd | Gas fired premixing combustion equipment |
| CN101900333A (en) * | 2010-07-22 | 2010-12-01 | 黄晓华 | High-temperature low-oxygen burner |
| CN105114951A (en) * | 2015-08-21 | 2015-12-02 | 北京航天动力研究所 | Tail edge backflow dual-classification low-nitrogen-oxygen gas burner |
| CN108506935A (en) * | 2018-05-28 | 2018-09-07 | 杭州浙大天元科技有限公司 | Based on the low NOx gas burners recycled in combustion gas and the method for reducing discharge |
| CN112325275A (en) * | 2020-11-13 | 2021-02-05 | 中船重工（上海）新能源有限公司 | Flue gas internal circulation type low-nitrogen combustion device |
-
2021
- 2021-05-17 CN CN202110550696.5A patent/CN113357931A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1151311A (en) * | 1997-07-31 | 1999-02-26 | Mitsubishi Heavy Ind Ltd | Gas fired premixing combustion equipment |
| CN101900333A (en) * | 2010-07-22 | 2010-12-01 | 黄晓华 | High-temperature low-oxygen burner |
| CN105114951A (en) * | 2015-08-21 | 2015-12-02 | 北京航天动力研究所 | Tail edge backflow dual-classification low-nitrogen-oxygen gas burner |
| CN108506935A (en) * | 2018-05-28 | 2018-09-07 | 杭州浙大天元科技有限公司 | Based on the low NOx gas burners recycled in combustion gas and the method for reducing discharge |
| CN112325275A (en) * | 2020-11-13 | 2021-02-05 | 中船重工（上海）新能源有限公司 | Flue gas internal circulation type low-nitrogen combustion device |
Non-Patent Citations (3)
| Title |
|---|
| 兰健等: "烟气再循环技术研究现状及发展趋势", 《节能》 * |
| 夏德宏等: "变压卷吸式低氧燃烧过程数值模拟", 《钢铁》 * |
| 肯尼斯•W.拉格兰德等著，张振忠等译: "《燃烧工程：第2版》/（美）》", 31 March 2020, 北京：冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216135A (en) * | 2021-12-01 | 2022-03-22 | 北京科技大学 | Based on CO2Circulating natural gas pure oxygen combustion zero-emission combustion system |
| CN115011363A (en) * | 2022-06-21 | 2022-09-06 | 中冶焦耐(大连)工程技术有限公司 | Vertical flame path structure of combustion chamber with low nitrogen emission |
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Application publication date: 20210907 |