CN110469850A - A kind of novel low nitrogen oxide burner structure - Google Patents
A kind of novel low nitrogen oxide burner structure Download PDFInfo
- Publication number
- CN110469850A CN110469850A CN201910622920.XA CN201910622920A CN110469850A CN 110469850 A CN110469850 A CN 110469850A CN 201910622920 A CN201910622920 A CN 201910622920A CN 110469850 A CN110469850 A CN 110469850A
- Authority
- CN
- China
- Prior art keywords
- combustion
- low nitrogen
- nitrogen oxide
- novel low
- natural gas
- 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.)
- Pending
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 75
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000007789 gas Substances 0.000 claims abstract description 44
- 239000003345 natural gas Substances 0.000 claims abstract description 39
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000000446 fuel Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 239000008246 gaseous mixture Substances 0.000 abstract description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 10
- 239000007921 spray Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization 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
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
-
- 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
- F23D14/70—Baffles or like flow-disturbing devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to natural gas clean combustion technique fields, provide a kind of novel low nitrogen oxide gas burner structure.The structure is divided into two-stage by natural gas channel and combustion-supporting gas channel, by air, forms fractional combustion.Pass through the collective effect of natural gas swirl branch pipe, air swirling device, fuel is set to reach equally distributed effect in the radial direction in burner, guarantee that the gaseous mixture of fuel and combustion air forms reasonable Flow Field Distribution at burner outlet, gaseous mixture proportion is reasonable, blending is uniform, rationally control combustion zone, to guarantee the stability of burning and obtain the emission effect of extremely low nitrogen oxides.
Description
Technical field
The present invention relates to natural gas clean combustion technique fields, especially provide a kind of novel low nitrogen oxide gas burner
Structure.
Background technique
In the combustion process of fuel, the generation of nitrogen oxides is some of combustion reaction: the nitrogen oxidation for generation of burning
If owner NO and NO2, are referred to as NOx.NOx in atmosphere is an important factor for causing acid rain, haze, to give human lives, ring
Extensive harm is brought in border, causes huge economic loss.
It is also increasingly stringent to the emission request of NOx as environmental requirement increasingly improves.In recent years, it is cleaned with natural gas etc.
Fuel gas, because it has many advantages, such as safe and efficient, easy to operate, low emission, is widely answered as clean type gas burner
Used in producing and living.But the NOx emission of gas burner still has very big improvement space, for gas burner
Low nitrogen emission-reduction technology still has very big researching value.Therefore, tissue is fired in novel low NOx fuel gas burner structure design
Burning, reduction pollutant emission are particularly important.
The generation of nitrogen oxides and temperature have close relationship, and the temperature of flame is higher, and the generation of nitrogen oxides is bigger, instead
.By reasonable designed combustion device structure, part can be reduced on the basis of guaranteeing that combustion completion is reliable, efficient
The generation of high-temperature region is uniformly mixed natural gas and air, to inhibit the generation of NOx in combustion process to reduce the row of NOx
High-volume.The gas burner being related in patent " 105135432 A of CN " and " 103842724 B of CN " is in design concept
With improved in structure type and promoted, but pollutant especially nitrogen oxides that these inventions generate are in face of increasingly strict
Environmental requirement still further to improve.Therefore a kind of novel low nitrogen oxide gas burner structure type carrys out tissue burning
It is necessary with control pollutant emission.
Summary of the invention
(1) technical problems to be solved
Existing natural gas boiler nitrogen oxides emission reduction schedule generallys use low NO cooperation flue gas recirculating technique, but
It is the flame holding for being limited by low NO, the fuel and air mixing uniformity of flue gas recycled amount and burner can not
Further improve, is further decreased to limit pollutant emission.
The present invention carries out rectification adjustment by using fairing, to burner local flow field, improves low NO
Flame holding is allowed for that more flue gas recycleds are added and realizes air more evenly and fuel mixing, reached with this
Further decrease the purpose of discharged nitrous oxides.
(2) technical solution
A kind of novel low nitrogen oxide gas burner structure provided by the invention, including internal natural gas channel and help
Blast tube.There are multiple peripheral natural gas branch pipes in the internal natural gas channel outer wall face.The periphery natural gas branch pipe is being held
Portion is provided with the inside teasehole with injection pipe and is provided with outside teasehole in end.The combustion-supporting gas channel is divided into internal layer axis
To combustion-supporting gas channel, outer layer axial direction combustion-supporting gas channel and swirl channel.Internal layer axial direction combustion-supporting gas channel is with rectification straight pipe, rotation
Circulation road includes cyclone, has swirl vane on cyclone.
Preferably, the swirl vane number on cyclone is 8~16.
Preferably, the eddy flow angle of the swirl vane on cyclone is 20 °~65 °.
Preferably, the number of peripheral natural gas branch pipe is 4~16.
Preferably, the diameter of the inside teasehole with injection pipe is 2~20mm.
Preferably, the number of outside teasehole is 1~5.
Preferably, the diameter of outside teasehole is 2~20mm.
Preferably, 2~6mm of diameter of natural gas branch pipe circumferential direction spray-hole.
Preferably, outer layer axial direction combustion air channel is with closing in.Corresponding close up upper one of each periphery natural gas branch pipe is slitted
Mouthful.
Preferably, closing in angle is 20 °~65 °
(3) beneficial effect
A kind of novel low nitrogen oxide burner structure provided by the invention, the technical solution pass through internal natural gas channel
And combustion-supporting gas channel, air is divided into inside and outside two-stage, forms fractional combustion.Pass through peripheral natural gas branch pipe and cyclone
Collective effect, makes natural gas and air obtain good mixed effect in burner, and the straight pipe of addition has improvement local flow
The beneficial effect of field, to realize that fuel and air form reasonable Flow Field Distribution in boiler furnace, the proportion of gaseous mixture is closed
Reason, blending uniformly, can rationalization combustion zone, thus reach burning stabilization and good nitrogen oxides emission reduction effect
Fruit.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of novel low nitrogen oxide gas burner structure of the embodiment of the present invention；
Fig. 2 is the schematic diagram of the novel low nitrogen oxide gas burner structure of another kind of the embodiment of the present invention；
Fig. 3 is a kind of three-dimensional cutaway view of novel low nitrogen oxide gas burner structure of the embodiment of the present invention.
Appended drawing reference: 1, natural gas channel；2, combustion-supporting gas channel；3, peripheral natural gas branch pipe；4, inside band injection pipe
Teasehole；5, outside teasehole；6, internal layer axial direction combustion-supporting gas channel；7, outer layer axial direction combustion-supporting gas channel；8, swirl channel；
9, straight pipe is rectified；10, cyclone；11, swirl vane；12, it closes up；13, gap.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
In the description of the present invention, unless otherwise indicated, the orientation or shape of the instructions such as term " on ", "lower", "left", "right"
State relationship is orientation based on the figure or state relation, is merely for convenience of description of the present invention and simplification of the description, rather than
The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot
It is interpreted as limitation of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connection " should be done
It broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be directly connected,
It can also be indirectly connected through an intermediary.For the ordinary skill in the art, can be understood with concrete condition above-mentioned
The concrete meaning of term in the present invention.
Referring to figs. 1 and 2, a kind of novel low nitrogen oxide gas burner structure provided by the invention, including it is interior
Portion natural gas channel 1 and combustion-supporting gas channel 2.Natural gas into internal natural gas channel 1 passes through peripheral fuel manifolds 3 one
Divide to enter by the inside teasehole 4 with injection pipe and spray, it is a part of to be sprayed by outside teasehole 5.
Combustion air is divided into three parts after entering combustion-supporting gas channel 2, respectively enters internal layer axial direction combustion-supporting gas channel 6, outer layer
Axial combustion-supporting gas channel 7 and swirl channel 8.Wherein, from the day that the outside teasehole 5 of peripheral 3 end of natural gas branch pipe sprays
Right gas is sufficiently mixed with the combustion air of outer layer axial direction combustion-supporting gas channel 7, forms stable peripheral flame area；Pass through rotation
The combustion air of circulation road 8 forms strong rotational flow gas, with the natural gas mixing that the inside teasehole 4 with injection pipe sprays, shape
At central stabilizer flame area.The position of flame is adjusted by the combustion-supporting gas of high speed of internal layer axial direction combustion-supporting gas channel 6.
By inside and outside layer natural gas distribution mode and the collective effect of the air method of salary distribution, formed in burner downstream
Efficiently, reliable combustion field.By the way that natural gas to be rationally uniformly distributed, the range of local high temperature zone is effectively reduced, presses down
The generation of NOx processed.
Preferably, the swirl vane number on cyclone is 8~16.
Preferably, the eddy flow angle of the swirl vane on cyclone is 20 °~65 °.
Preferably, the number of peripheral natural gas branch pipe is 4~16.
Preferably, the diameter of the inside teasehole with injection pipe is 2~20mm.
Preferably, the number of outside teasehole is 1~5.
Preferably, the diameter of the outside teasehole is 2~20mm.
Preferably, 2~6mm of diameter of natural gas branch pipe circumferential direction spray-hole.
Preferably, closing in angle is 20 °~65 °
Working principle of the present invention is as follows:
Natural gas into internal natural gas channel 1 passes through peripheral 3 a part of fuel manifolds and passes through inside band injection pipe
Teasehole 4 enter and spray, a part is sprayed by outside teasehole 5.
Combustion air is divided into three parts after entering combustion-supporting gas channel 2, respectively enters internal layer axial direction combustion-supporting gas channel 6, outer layer
Axial combustion-supporting gas channel 7 and swirl channel 8.Wherein, from the day that the outside teasehole 5 of peripheral 3 end of natural gas branch pipe sprays
Right gas is sufficiently mixed with the combustion air of outer layer axial direction combustion-supporting gas channel 7, forms stable peripheral flame area；Pass through rotation
The combustion air of circulation road 8 forms strong rotational flow gas, with the natural gas mixing that the inside teasehole 4 with injection pipe sprays, shape
At central stabilizer flame area.The position of flame is adjusted by the combustion-supporting gas of high speed of internal layer axial direction combustion-supporting gas channel 6.
By the way that natural gas to be rationally uniformly distributed, the range of local high temperature zone is effectively reduced, inhibits the life of NOx
At.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of novel low nitrogen oxide gas burner structure provided by the invention, by internal natural gas channel (1) and is helped
Blast tube (2) is constituted；Internal natural gas channel (1) outside wall surface has multiple peripheral natural gas branch pipes (3), in peripheral natural gas branch
Pipe (3) end is provided with inside teasehole (4) and outside teasehole (5) with injection pipe；Combustion-supporting gas channel (2) is divided into internal layer
Axial combustion-supporting gas channel (6), outer layer axial direction combustion-supporting gas channel (7) and swirl channel (8)；It is characterized in that, the internal layer is axial
Combustion-supporting gas channel (6) is with rectification straight pipe (9).
2. a kind of novel low nitrogen oxide burner structure according to claim 1, which is characterized in that swirl channel (8)
Include cyclone (10).
3. a kind of novel low nitrogen oxide burner structure according to claim 2, which is characterized in that the cyclone
(10) it is provided on swirl vane (11), eddy flow angle is 20 °~65 °.
4. a kind of novel low nitrogen oxide burner structure according to claim 1, which is characterized in that the periphery is natural
The number of gas branch pipe (3) is 4~16.
5. a kind of novel low nitrogen oxide burner structure according to claim 1, which is characterized in that the inside band
The diameter of the teasehole (4) of injection pipe is 2~20mm.
6. a kind of novel low nitrogen oxide burner structure according to claim 1, which is characterized in that the outside combustion
The number for expecting hole (5) is 1~5.
7. a kind of novel low nitrogen oxide burner structure according to claim 1, which is characterized in that the outside combustion
The diameter for expecting hole (5) is 2~20mm.
8. a kind of novel low nitrogen oxide burner structure according to claim 1, which is characterized in that the natural gas branch
2~6mm of diameter of pipe circumferential direction spray-hole (7).
9. a kind of novel low nitrogen oxide burner structure according to claim 1, which is characterized in that the outer layer is axial
The closing in (12) in combustion air channel (7) is provided with a gap (13) on the corresponding position of each periphery natural gas branch pipe (3).
10. a kind of novel low nitrogen oxide burner structure according to claim 9, which is characterized in that the closing in
(12) angle is 20 °~65 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910622920.XA CN110469850A (en) | 2019-07-11 | 2019-07-11 | A kind of novel low nitrogen oxide burner structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910622920.XA CN110469850A (en) | 2019-07-11 | 2019-07-11 | A kind of novel low nitrogen oxide burner structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110469850A true CN110469850A (en) | 2019-11-19 |
Family
ID=68507216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910622920.XA Pending CN110469850A (en) | 2019-07-11 | 2019-07-11 | A kind of novel low nitrogen oxide burner structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN110469850A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964048A (en) * | 2020-08-20 | 2020-11-20 | 长沙理工大学 | Rotational flow ultralow NOXGas burner |
| CN113819477A (en) * | 2021-10-12 | 2021-12-21 | 贵州大学 | Wide-load denitration and combustion stabilization system for auxiliary thermal power and electric coal-fired unit |
| CN115143463A (en) * | 2022-07-07 | 2022-10-04 | 深圳市佳运通电子有限公司 | Hierarchical flue gas inner loop low NOx burner |
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| EP2244014A2 (en) * | 2009-04-23 | 2010-10-27 | General Electric Company | Radial lean direct injection burner |
| CN105042591A (en) * | 2015-07-14 | 2015-11-11 | 北京市公用事业科学研究所 | Low NOx gas burner and fuel gas configuration method thereof |
| CN105698172A (en) * | 2016-04-11 | 2016-06-22 | 徐州科融环境资源股份有限公司 | Petal-shaped staged combustion gas low-nitrogen combustor |
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| CN108954309A (en) * | 2018-08-15 | 2018-12-07 | 山东中科天健环保科技有限公司 | A kind of novel low nitrogen oxide burner structure |
| CN211204047U (en) * | 2019-07-11 | 2020-08-07 | 山东中科天健环保科技有限公司 | Novel low-nitrogen gas burner |
-
2019
- 2019-07-11 CN CN201910622920.XA patent/CN110469850A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2244014A2 (en) * | 2009-04-23 | 2010-10-27 | General Electric Company | Radial lean direct injection burner |
| CN105042591A (en) * | 2015-07-14 | 2015-11-11 | 北京市公用事业科学研究所 | Low NOx gas burner and fuel gas configuration method thereof |
| CN105698172A (en) * | 2016-04-11 | 2016-06-22 | 徐州科融环境资源股份有限公司 | Petal-shaped staged combustion gas low-nitrogen combustor |
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| CN108954309A (en) * | 2018-08-15 | 2018-12-07 | 山东中科天健环保科技有限公司 | A kind of novel low nitrogen oxide burner structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964048A (en) * | 2020-08-20 | 2020-11-20 | 长沙理工大学 | Rotational flow ultralow NOXGas burner |
| CN113819477A (en) * | 2021-10-12 | 2021-12-21 | 贵州大学 | Wide-load denitration and combustion stabilization system for auxiliary thermal power and electric coal-fired unit |
| CN113819477B (en) * | 2021-10-12 | 2023-08-29 | 贵州大学 | Wide-load denitration stable combustion system for auxiliary thermal power coal-fired unit |
| CN115143463A (en) * | 2022-07-07 | 2022-10-04 | 深圳市佳运通电子有限公司 | Hierarchical flue gas inner loop low NOx burner |
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