CN110360550B - Industrial gas rotary energy-saving low-nitrogen burner - Google Patents
Industrial gas rotary energy-saving low-nitrogen burner Download PDFInfo
- Publication number
- CN110360550B CN110360550B CN201810308742.9A CN201810308742A CN110360550B CN 110360550 B CN110360550 B CN 110360550B CN 201810308742 A CN201810308742 A CN 201810308742A CN 110360550 B CN110360550 B CN 110360550B
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- Prior art keywords
- gas
- air
- rotary
- main body
- head main
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- 239000007789 gas Substances 0.000 title claims abstract description 69
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 claims abstract description 87
- 238000010992 reflux Methods 0.000 claims abstract description 26
- 239000011148 porous material Substances 0.000 claims description 2
- 239000011800 void material Substances 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 15
- 239000002737 fuel gas Substances 0.000 abstract description 9
- 230000003068 static effect Effects 0.000 abstract description 8
- 239000000446 fuel Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 238000004134 energy conservation Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/007—Mixing tubes, air supply regulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14005—Rotary gas burner
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses an industrial gas rotary energy-saving low-nitrogen burner, which belongs to the technical field of gas combustion devices and comprises an air chamber, wherein an air thermal reflux bin is circumferentially arranged above the air chamber, and the bottom of the air thermal reflux bin is communicated with the air chamber; the middle part at the air chamber sets up the gas and is responsible for, sets up the gas spout at the pipe shaft middle part that the gas was responsible for, is equipped with rotatory combustion head main part in the upper portion that the combustion was responsible for, is equipped with driving vane in the bottom of this rotatory combustion head main part, and rotatory combustion head main part passes through the bearing and rotates to be fixed on the gas is responsible for. The invention changes the static combustion of the traditional burner into rotary dynamic combustion, and the gap area formed by the rotary combustion head main body and the static air thermal reflux bin is a static annular flame to wrap the rotary combustion head main body; meanwhile, fuel waste and high nitrogen oxides caused by multistage sectional combustion of air and fuel gas are avoided.
Description
Technical Field
The invention belongs to the technical field of gas combustion devices, and particularly relates to an industrial gas rotary energy-saving low-nitrogen burner.
Background
At present, in industrial production, in order to achieve the effects of energy conservation, efficiency improvement and nitrogen reduction, two modes of instantaneous air-fuel mixing and pre-mixing in advance are adopted in the aspect of energy conservation, and the two modes can cause excessive air and insufficient air, so that a great amount of heat energy is taken away by flue gas, and the flue gas is heated and decomposed to cause waste of the fuel gas.
In recent years, waste heat recovery devices are adopted, namely, the heat of flue gas exhausted from a furnace body is preheated by a heat exchanger, so that combustion air can be truly reduced in consumption and energy conservation, and the waste heat recovery devices have the defects of large size, long pipelines and increased input cost, and consume a large amount of electric energy of a fan in use, so that the use cost is greatly increased.
In the aspect of nitrogen reduction, the currently commonly adopted gas staged combustion and air staged distribution combustion have certain nitrogen reduction effect, but the mode still often cannot reach the emission standard of nitrogen oxides.
In recent years, more and more enterprises adopt an external flue gas recovery pipeline, and use an exhaust fan to extract part of flue gas in the furnace and mix the flue gas with combustion air so as to reduce the oxygen content in the air and achieve the purpose of reducing nitrogen. In practical application, the oxygen content in the combustion air is reduced, so that unstable combustion of flame occurs, and detonating sound occurs, thereby increasing potential safety hazard. Meanwhile, a large amount of water vapor in the back-pumped flue gas generates condensed water when meeting cold, and serious corrosion can be generated on the pipeline for a long time. The recycling flue gas pipeline is replaced periodically, and the investment and the use cost are increased. Although the nitrogen reduction method has a plurality of defects, enterprises still have to use the nitrogen reduction method in the face of nitrogen reduction demands due to no new technology replacement.
Disclosure of Invention
The invention aims to: the invention aims to provide an industrial gas rotary energy-saving low-nitrogen burner which can reduce the temperature of a combustion head and combustion flame, and simultaneously heat combustion air of an air chamber, so that fuel waste and high nitrogen oxides caused by multistage sectional combustion of air and gas are avoided.
The technical scheme is as follows: in order to achieve the above purpose, the present invention adopts the following technical scheme:
The industrial gas rotary energy-saving low-nitrogen burner comprises an air chamber, wherein an air hot reflux bin is circumferentially arranged above the air chamber, and the bottom of the air hot reflux bin is communicated with the air chamber; the middle part of the air chamber is provided with a gas main pipe, the middle part of the pipe body of the gas main pipe is provided with a gas nozzle, the upper part of the combustion main pipe is provided with a rotary combustion head main body, the bottom of the rotary combustion head main body is provided with driving blades, and the rotary combustion head main body is rotationally fixed on the gas main pipe through a bearing.
An air inlet is arranged on one side of the air chamber, and a gas inlet pipe is arranged on the gas main pipe.
The driving blades are circumferentially distributed at the bottom of the rotary combustion head main body.
The upper part of the air thermal reflux bin extends to the flame burning position, the middle part of the air thermal reflux bin covers the main body of the rotary burning head, and the lower part of the air thermal reflux bin extends to the gas nozzle.
And a gap area is formed between the rotary combustion head main body and the air thermal reflux bin.
The width of the gap area is 3-5mm.
The gap area is connected with the gas at the upper part of the main body of the rotary combustion head and is connected with the gas in the premixing bin.
And a premixing bin is formed in the area between the pipe section where the gas nozzle is positioned and the air hot reflux bin.
A plurality of unit fire-spraying pipes are distributed on the main body of the rotary combustion head, and the bottoms of the unit fire-spraying pipes are communicated with the premixing bin.
The principle of the invention: the formation of nitrogen oxides, for example natural gas, is not self-contained and its formation mechanism is thermal and rapid. The thermal type is that the combustion temperature is locally too high, so that nitrogen and oxygen in the air form a combination. This requires control of the combustion high temperature region while reducing the excess air ratio; the rapid type is because the excessive fuel gas is decomposed and then combined with nitrogen in the air, which requires an increase in the excess air ratio. The thermal type and the rapid type are a pair of contradictors in terms of nitrogen reduction principle, and the key is to find a reasonable excess air coefficient, in practice, the uncertainty of external conditions is difficult to grasp, the rotary combustion head can break a high-temperature area of combustion, and meanwhile, the excess air coefficient is reduced by reburning smoke, so that energy conservation and nitrogen reduction are perfectly unified.
The rotary combustion head main body forms centrifugal flame and flame separation during combustion, so that combustion is unstable, and a gap area formed by the rotary combustion head main body and the air thermal reflux bin plays a key role in stabilizing the rotary combustion head main body. Meanwhile, the heat flow of the secondary air reduces the temperature of the main body of the rotary combustion head and heats the combustion air.
When air enters the air chamber at a certain pressure and is mixed with fuel gas at a certain pressure, the kinetic energy of the mixed gas drives the bearing through the driving blade, so that the main body of the rotary combustion head rotates, and meanwhile, most of the mixed gas enters a unit flaming pipe arranged in the main body of the rotary combustion head; and the other part of the mixed gas enters a gap area between the main body of the rotary combustion head and the air thermal reflux bin to form a complete flame combustion circular ring (called stable flame). In the combustion process, the main body of the rotary combustion head continuously rotates, and the flame stabilizing flame plays a role in stabilizing the combustion state of the flame. The air in the air hot reflux bin is subjected to cold and heat convection exchange, so that on one hand, the temperature of the combustion head and the combustion flame can be reduced, and meanwhile, the combustion air of the air chamber is heated.
The beneficial effects are that: compared with the prior art, the industrial gas rotary energy-saving low-nitrogen burner drives the driving blade connected with the rotary combustion head main body through the kinetic energy of main air flow and gas to drive the rotary combustion head main body to rotate; the static combustion of the traditional burner is changed into rotary dynamic combustion, and a gap area formed by the rotary combustion head main body and the static air hot reflux bin is a static annular flame to wrap the rotary combustion head main body; meanwhile, fuel waste and high nitrogen oxides caused by multistage sectional combustion of air and fuel gas are avoided.
Drawings
FIG. 1 is a cross-sectional view of an industrial gas rotary energy-saving low nitrogen burner;
FIG. 2 is a top view of a rotary combustion head body;
Fig. 3 is a bottom view of the rotary combustion head body.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1-3, the reference numerals are as follows: the air heat backflow bin 1, the rotary combustion head main body 2, the driving blade 3, the premixing bin 4, the gas nozzle 5, the gas main pipe 6, the gas inlet pipe 7, the air chamber 8, the air inlet 9, the bearing 10, the unit fire tube 11 and the gap area 12. The direction of the arrows in the drawing is the flow direction of the gas.
The industrial gas rotary energy-saving low-nitrogen burner comprises an air chamber 8, wherein an air thermal reflux bin 1 is circumferentially arranged above the air chamber 8, and the bottom of the air thermal reflux bin 1 is communicated with the air chamber 8.
An air inlet 9 is formed in one side of the air chamber 8, a gas main pipe 6 is arranged in the middle of the air chamber 8, a gas inlet pipe 7 is arranged on the gas main pipe 6, a gas nozzle 5 is arranged in the middle of the pipe body of the gas main pipe 6, a rotary combustion head main body 2 is arranged at the upper part of the combustion main pipe 6, and a driving blade 3 is arranged at the bottom of the rotary combustion head main body 2; wherein the rotary combustion head main body 2 is rotationally fixed on the gas main pipe 6 through a bearing 10. The driving blades 3 are circumferentially distributed at the bottom of the rotary combustion head body 2.
The upper part of the air thermal reflux bin 1 extends to the flame burning position, the middle part covers the rotary combustion head main body 2, and the lower part extends to the gas nozzle 5.
A gap area 12 is formed between the rotary combustion head main body 2 and the air thermal reflux bin 1, and the width of the gap area 12 is 3-5mm. The gap area 12 is connected with the gas at the upper part of the main body 2 of the rotary combustion head, and is connected with the gas in the premixing bin 4, and static circular flame is formed at the gap area 12 to wrap the rotary combustion head in the actual combustion process, so that a bright aperture is formed.
The area between the pipe section where the gas nozzle 5 is positioned and the air hot reflux bin 1 forms a premixing bin 4, and the gas sprayed from the gas nozzle 5 meets the air from the air chamber 8 to form a mixed gas of the gas and the air.
A plurality of unit fire-spraying pipes 11 are distributed on the rotary combustion head main body 2, and the bottoms of the unit fire-spraying pipes 11 are communicated with the premixing bin 4.
The working process comprises the following steps: the mixed gas of air and fuel gas enters the premixing bin 4, the driving blade 3 enables the air and the fuel gas to be fully stirred, the air and the fuel gas are uniformly mixed, and then the mixed gas enters each combustion unit of the rotary combustion head main body 2, namely a unit flaming tube 11. The pore diameters of the respective unit fire tubes 11 may be the same or different. When the apertures of the respective unit flame tubes 11 are the same, the combustion process thereof does not accelerate the rotary combustion head main body 2; when the sizes of the apertures of the flaming pipes 11 of the units are different, a transverse static pressure difference is generated during combustion, and the rotation of the main body 2 of the rotary combustion head driven by the active energy of air and fuel gas is accelerated (each combustion unit rotates by 360 degrees), so that the temperature of combustion flame is quite uniform, and the rotation generates huge entrainment on smoke gas, so that the smoke gas is circularly combusted; the flame sprayed out of the main body 2 of the rotary combustion head is forwards pushed at a high speed in a 'tornado' shape, and when encountering a large space, the flame and the temperature field are in mushroom-shaped divergence, which is more beneficial to the temperature transmission.
Claims (5)
1. Industrial gas rotary energy-saving low-nitrogen burner, characterized in that: the device comprises an air chamber (8), wherein an air thermal reflux bin (1) is circumferentially arranged above the air chamber (8), and the bottom of the air thermal reflux bin (1) is communicated with the air chamber (8); a gas main pipe (6) is arranged in the middle of the air chamber (8), a gas nozzle (5) is arranged in the middle of the pipe body of the gas main pipe (6), a rotary combustion head main body (2) is arranged at the upper part of the gas main pipe (6), a driving blade (3) is arranged at the bottom of the rotary combustion head main body (2), and the rotary combustion head main body (2) is rotationally fixed on the gas main pipe (6) through a bearing (10);
A gap area (12) is formed between the rotary combustion head main body (2) and the air thermal reflux bin (1); the gap area (12) is connected with the gas at the upper part of the rotary combustion head main body (2) and is connected with the gas in the premixing bin (4) at the lower part; the area between the pipe section where the gas nozzle (5) is positioned and the air hot reflux bin (1) forms a premixing bin (4);
A plurality of unit flaming pipes (11) are distributed on the rotary combustion head main body (2), the bottoms of the unit flaming pipes (11) are communicated with the premixing bin (4), and the pore sizes of the unit flaming pipes (11) are different.
2. The industrial gas rotary energy-saving low-nitrogen burner according to claim 1, characterized in that: an air inlet (9) is arranged on one side of the air chamber (8), and a gas inlet pipe (7) is arranged on the gas main pipe (6).
3. The industrial gas rotary energy-saving low-nitrogen burner according to claim 1, characterized in that: the driving blades (3) are circumferentially distributed at the bottom of the rotary combustion head main body (2).
4. The industrial gas rotary energy-saving low-nitrogen burner according to claim 1, characterized in that: the upper part of the air thermal reflux bin (1) extends to the flame burning position, the middle part of the air thermal reflux bin covers the rotary burning head main body (2), and the lower part of the air thermal reflux bin extends to the gas nozzle (5).
5. The industrial gas rotary energy-saving low-nitrogen burner according to claim 1, characterized in that: the width of the void area (12) is 3-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810308742.9A CN110360550B (en) | 2018-04-09 | 2018-04-09 | Industrial gas rotary energy-saving low-nitrogen burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810308742.9A CN110360550B (en) | 2018-04-09 | 2018-04-09 | Industrial gas rotary energy-saving low-nitrogen burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110360550A CN110360550A (en) | 2019-10-22 |
| CN110360550B true CN110360550B (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810308742.9A Active CN110360550B (en) | 2018-04-09 | 2018-04-09 | Industrial gas rotary energy-saving low-nitrogen burner |
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| Country | Link |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011112345A (en) * | 2009-11-30 | 2011-06-09 | Ihi Corp | Burner device for multi-fuel |
| KR101569455B1 (en) * | 2015-07-14 | 2015-11-16 | 주식회사 수국 | Complex burner for Low nitrogen oxide |
| CN208431757U (en) * | 2018-04-09 | 2019-01-25 | 江苏弗雷姆环境科技有限公司 | Industrial combustion gas rotary energy saving low NO |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052677B (en) * | 2011-01-19 | 2012-09-12 | 兰州泰得燃烧设备工程有限公司 | Industrial gas burner |
| CN102927561B (en) * | 2012-11-27 | 2015-02-18 | 东方电气集团东方锅炉股份有限公司 | Burning system of heavy oil boiler and method thereof |
| CN205504983U (en) * | 2016-04-01 | 2016-08-24 | 北京佳德昌科技有限责任公司 | Gas recirculation low NOx burner in combustion -supporting wind injection type stove |
| CN205592954U (en) * | 2016-05-06 | 2016-09-21 | 北京佳德昌科技有限责任公司 | One -level gas injection type low NOx burner |
| CN106402861B (en) * | 2016-11-11 | 2018-03-06 | 江苏弗雷姆环境科技有限公司 | The ultralow indole energy spiral combustion head of industrial combustion gas and burner |
| CN107166395B (en) * | 2017-05-31 | 2019-01-29 | 北京理工大学 | A kind of self-loopa low nitrogen oxide swirling burner |
-
2018
- 2018-04-09 CN CN201810308742.9A patent/CN110360550B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011112345A (en) * | 2009-11-30 | 2011-06-09 | Ihi Corp | Burner device for multi-fuel |
| KR101569455B1 (en) * | 2015-07-14 | 2015-11-16 | 주식회사 수국 | Complex burner for Low nitrogen oxide |
| CN208431757U (en) * | 2018-04-09 | 2019-01-25 | 江苏弗雷姆环境科技有限公司 | Industrial combustion gas rotary energy saving low NO |
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| CN110360550A (en) | 2019-10-22 |
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