CN107543203A - A kind of twin-stage twofold whirl nozzle for fuel gas low pollution combustor - Google Patents
A kind of twin-stage twofold whirl nozzle for fuel gas low pollution combustor Download PDFInfo
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- CN107543203A CN107543203A CN201710717236.0A CN201710717236A CN107543203A CN 107543203 A CN107543203 A CN 107543203A CN 201710717236 A CN201710717236 A CN 201710717236A CN 107543203 A CN107543203 A CN 107543203A
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Abstract
The present invention is a kind of twin-stage twofold whirl nozzle for fuel gas low pollution combustor, including level cyclone 1 on duty, main combustion stage cyclone 2, simplifies burner inner liner 3, diffuser 4, in determining flame 5, main whirlpool 6, wall-jets 7.Level cyclone 1 on duty forms to stay with the interaction of main combustion stage cyclone 2 determines flame 5, and then forms lift-off flame；Strengthen level high equivalent weight on duty than combustion product and main combustion stage fresh combustion gases blending, light effect, primary zone temperature, the length of flame, residence time are reduced, reaches low emission purpose, widens stable operation range, increase fuel type selection, tempering, carbon distribution the problems such as also no longer occur.Low temperature wall-jets 7 provide natural thermal barrier coatings, make to simplify the wall of burner inner liner 3 and are maintained at lower temperature, avoid the cooling structure design that floating wall etc. is complicated substantially; reduce and simplify the weight of burner inner liner 3; complex designing degree is reduced, increases the intensity for simplifying burner inner liner 3, protecting effect is more preferable.
Description
Technical field
The invention belongs to gas turbine to be classified low pollution combustor application field, and in particular to it is low that one kind is used for fuel gas
The twin-stage twofold whirl nozzle of contamination combustion chamber.
Background technology
Realize low emission requirement, it is necessary to equal in high-temperature region residence time, raising from primary zone temperature, shortening combustion gas is reduced
Even property etc. is started with.It is complete for combustion with reduced pollutants mechanism although lean fuel premixed combustion can realize the purpose of low emission
Complete uniform lean premixed burning has the shortcomings that combustion instability, therefore in application lean fuel premixed combustion technology, often adopts
With classification or Bedding Method.Foreign study person is studied the working method of level on duty, and discovery value class is using premix
When flame surely fires, for the relative level on duty using diffusion flame, NOx emission can be effectively reduced, while is also had steady well
It is qualitative.Nevertheless, because level equivalent proportion on duty is higher, so the problems such as being still also easy to produce tempering, carbon distribution, while still suffer from part
High temperature, and combustion gas is longer in the high-temperature region residence time, is unfavorable for emission control.During using hydrogen loading fuel, tempering problem is particularly tight
Weight；When using synthesis gas, cracking gas fuel, because its gas component excursion is larger, flame propagation velocity is caused to fluctuate
Scope is big, and flame pulsation is more violent.This is all that low emission technology applies upper unfavorable factor.
The content of the invention
For insufficient present in currently available technology, the present invention is intended to provide one kind can use in the range of full working scope
(including the fuel gas such as hydrogen-containing fuel, cracking gas, synthesis gas, natural gas), can substantially reduce localized hyperthermia, reduce combustion gas exist
The residence time of high-temperature area, pollutant emission is significantly reduced, be simple and compact for structure, is used for gas with good working effect
The twin-stage twofold whirl nozzle of state fuel low pollution combustor.
The object of the present invention is achieved like this：
The present invention is a kind of twin-stage twofold whirl nozzle for fuel gas low pollution combustor, including level eddy flow on duty
Device 1, diffuser 4, main combustion stage cyclone 2, simplified burner inner liner 3, it is characterised in that：Described level cyclone 1 on duty is by hollow circle
Post wheel hub 12, bent blade 11 form, main combustion stage cyclone 2 by delta-blade 21, chassis 22, take over a business 23 and form, diffuser 4 is by putting down
Straight section, expansion segment composition, main combustion stage cyclone 2 are made of one with diffuser 4；High equivalent weight enters than mixed gas from level cyclone 1 on duty
Enter, level flow W on duty1With main combustion stage flow W2The ratio between be W1:W2=1:6, the central also air inlet of hollow circuit cylinder wheel hub 12, in utilization
The adverse pressure gradient of the straight-through outlet downstream of air-flow inhibiting value class cyclone 1 in centre, produces wall-jets 7, is interacted with main whirlpool 6
Formed to stay and determine flame 5, and then form stable lift-off flame；Low equivalent enters than mixed gas from main combustion stage cyclone 2, forms main whirlpool
6 and wall-jets 7.
For the described established angle of bent blade 11 between 25 °~45 °, the length of hollow circuit cylinder wheel hub 12 is slightly larger than the bent string of blade 11
It is long；Level equivalent proportion on duty is between 0.6~1, and global equivalent proportion is between 0.2~0.3.
Described expansion segment outlet diameter is slightly less than the exit inside diameter of main combustion stage cyclone 2, forms the platform that height is 2~5mm
Rank 24, small whirlpool is produced in this place, by two-stage wall-jets 7 from a distance.
The described established angle of delta-blade 21 is between 30 °~45 °；Main combustion stage cyclone 2 is designed using strong swirling number, rotation
Fluxion is between 0.8~1.26.
Compared with prior art, beneficial effect is the present invention：
The grading design of twofold whirl, level cyclone 1 and main combustion stage cyclone 2 interaction on duty is set to form stable stay
Determine flame 5, and then form stable lift-off flame；Level high equivalent weight on duty is strengthened than combustion product and main combustion stage fresh combustion gases
Blend, light effect, reduce primary zone temperature, reduce the length of flame.Because high-temperature region is not at center of vorticity, this design
It has been significantly reduced the residence time.Like this, low emission purpose had just both been reached, and had widened stable operation range again, also increased
Added the selection of fuel type, such as tempering, carbon distribution the problems such as also no longer occur.Further, since this flow through simplified burner inner liner 3
The low temperature wall-jets 7 of most of inner surface provide natural thermal barrier coatings, make to simplify the wall of burner inner liner 3 and are maintained at compared with low temperature
Degree, the complicated cooling structure design such as Cooling Holes, floating wall is substantially avoided, the simplified weight of burner inner liner 3 is reduced, reduces design
Complexity, the intensity of simplified burner inner liner 3 is added, simplify the simplified pneumatic design of burner inner liner 3, protecting effect is more preferable.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of level cyclone 1 on duty of the present invention.
Fig. 3 is the structural representation of diffuser 4 of the present invention.
Fig. 4 is the structural representation of main combustion stage cyclone 2 of the present invention.
Fig. 5 is the present invention and flow field during simplified 3 assembly work of burner inner liner and streamline distribution.
Fig. 6 is the present invention with simplifying thermo parameters method during 3 assembly work of burner inner liner.
Fig. 7 is speed and static temperature distribution map on the axis of the present invention.
Fig. 8 is methane and carbon dioxide mass fraction distributions on the axis of the present invention.
Embodiment
The present invention is described in more detail below in conjunction with the accompanying drawings：
As Figure 1-4, a kind of twin-stage twofold whirl nozzle for fuel gas low pollution combustor includes level on duty
Cyclone 1, main combustion stage cyclone 2, simplify burner inner liner 3, diffuser 4, in determining flame 5, main whirlpool 6, wall-jets 7.
Described value class cyclone 1 is made up of hollow circuit cylinder wheel hub 12, bent blade 11.High equivalent weight revolves than mixed gas from level on duty
Stream device 1 enters, level flow W on duty1With main combustion stage flow W2The ratio between be W1:W2=1:6, the central also air inlet of hollow circuit cylinder wheel hub 12,
Using the adverse pressure gradient of the straight-through outlet downstream of air-flow inhibiting value class cyclone 1 in center, while rotary expansion, no is generated again
Whirlpool Fragmentation Phenomena occurs, there is certain speed to be unlikely to suppress the jet in main whirlpool 6 again, being interacted with main whirlpool 6, it is stable to be formed
Stay and determine flame 5, and then form stable lift-off flame and (cracking gas, synthesis gas, naturally can be thus used with full working scope scope
The fuel such as gas), it is entirely avoided tempering and carbon distribution (hydrogen loading fuel can be thus used in big compositional range).Strengthen value
Class's high equivalent weight than combustion product and main combustion stage fresh combustion gases blending, light effect, reduce primary zone temperature, reduce and stay
Determine the length of flame 5.Because high-temperature region is not at center of vorticity, this design has been significantly reduced the residence time.Hollow circuit cylinder wheel
The length of hub 12 is slightly larger than the bent chord length of blade 11, plays a part of certain shunting and water conservancy diversion, and bent blade 11 can reduce flowing point
From caused loss.
The diffuser 4 is made up of flat segments, expansion segment.Radial grading structures shape main combustion stage colder low equivalent ratio
Jet can put out the effect , temper effect of putting out to level flame Chan Sheng temper on duty can be significantly increased CO discharge capacitys, reduce efficiency of combustion, and right
Idling rating fuel-lean blowout performance is also unfavorable.Expansion segment outlet diameter is slightly less than the exit inside diameter of main combustion stage cyclone 2, thus shape
The step 24 highly moderate into one, so can delay main combustion stage is adherent to penetrate by two-stage wall-jets 7 from a distance
The mixing of stream 7 and level flame on duty, the abundant burning for level flame on duty provide the time.Diffuser 4 is common with level cyclone 1 on duty
Same-action, control equivalent proportion distributed areas, forms diffusion profile, the upward excessive development of limits value class flame.
The main combustion stage cyclone 2 by delta-blade 21, chassis 22, take over a business 23, step 24 and form.Main combustion stage cyclone 2
Designed using strong swirling number, and be made of one with diffuser 4.Low equivalent enters than mixed gas from main combustion stage cyclone 2.Appropriate intensity
Rotational flow form huge main whirlpool 6 and the high speed wall-jets 7 that simplified burner inner liner 3 exports will not be touched.Because high-temperature region
It is not located at main whirlpool 6, so main whirlpool 6 can't increase the residence time, and is remarkably contributing to stable burn.Due to wall-jets 7
Potential barrier area speed it is very high, level flame on duty again positioned at simplifying the center of burner inner liner 3, so wall-jets 7 be low temperature, it is unburned
Jet.During using nozzle arrangements of the invention, due to this low temperature wall-jets for flowing through simplified 3 most of inner surface of burner inner liner
7 provide natural thermal barrier coatings, make to simplify the wall of burner inner liner 3 and are maintained at lower temperature, substantially avoided simplified burner inner liner 3 and cool down
The complicated cooling structure design such as hole, floating wall, reduces the simplified weight of burner inner liner 3, reduces complex designing degree, add letter
Change the intensity of burner inner liner 3, simplify the simplified pneumatic design of burner inner liner 3, and protecting effect is more preferable.
Fig. 5-6 is the working state schematic representation of the present invention.As shown in figure 5, the high equivalent weight of level cyclone 1 on duty compares mixed air-flow
After going out diffuser 4, because adverse pressure gradient caused by straight-through air-flow and main flow rotary expansion interacts, in the outlet of diffuser 4
It is formed about staying and determines flame 5, " hanging " heart with symmetrical double vortex structure is generated simplifying the middle position of burner inner liner 3
Recirculating zone --- main whirlpool 6.Due to the effect that forces of level cyclone 1 on duty, high equivalent weight is exporting rotary expansion than mixed gas, is mixed with main
The mixed gas of clutch outlet blends.As shown in fig. 6, level high equivalent weight on duty intersects position in low regime than mixed gas with recirculating zone
Put --- in determining fully to burn at flame 5, a temperature is formed in 2100K or so narrow high-temperature region.At the center of vorticity of recirculating zone
Temperature is relatively low, in 1900K or so.The exit flow of main combustion stage cyclone 2 produces wall-jets 7 due to strong cyclonic action.
Left ordinate is axial velocity (meter per second) in Fig. 7, and right ordinate is temperature (opening), and square broken line is axial velocity,
Circular broken line is temperature；Left ordinate is methane mass fraction (kg/kg*gas) in Fig. 8, and right ordinate is carbon dioxide quality
Fraction (kg/kg*gas), square broken line are methane mass fraction, and circular broken line is carbon dioxide mass fraction.Such as Fig. 7 and Fig. 8
It is shown, generate less than 4.248m/s low regime in the exit of diffuser 4.In low regime, premix gas occurs rapidly chemical anti-
Should, temperature raises rapidly, changes close to linear, slope is approximately perpendicular to axis of abscissas, and amplitude of variation is violent, greatly shortens
Stay and determine the length of flame 5.Corresponding, the methane mass fraction premixed in gas declines rapidly, slope and temperature curve slope
Almost on cross intersection point it is symmetrical parallel to the straight line of axis of abscissas, temperature is zero, at the afterbody of low regime in axial velocity, methane with
Air reacts completely, and residual mass fraction is 0, and only main flow chemically reacts in recirculating zone, but because its is relatively low
Equivalent proportion, ignition temperature be not high.Thermal-flame caused by level on duty is away from center of vorticity, and no swirl flow, combustion gas is in high-temperature region
Residence time is shorter.
One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this hair
Bright principle, it should be understood that the protection domain of invention is not limited to such especially statement and embodiment.It is every according to upper
State description and make various possible equivalent substitutions or change, be all considered to the scope of the claims for belonging to the present invention.
Claims (4)
1. a kind of twin-stage twofold whirl nozzle for fuel gas low pollution combustor, including level cyclone on duty (1), diffusion
Device (4), main combustion stage cyclone (2), simplify burner inner liner (3), it is characterised in that：Described level cyclone (1) on duty is by hollow circle
Post wheel hub (12), bent blade (11) composition, main combustion stage cyclone (2) by delta-blade (21), chassis (22), take over a business (23) group
Into diffuser (4) is made up of flat segments, expansion segment, and main combustion stage cyclone (2) is made of one with diffuser (4)；High equivalent weight is than mixed
Gas enters from level cyclone (1) on duty, level flow W on duty1With main combustion stage flow W2The ratio between be W1:W2=1:6, hollow circuit cylinder wheel
Hub (12) center also air inlet, using the adverse pressure gradient of straight-through air-flow inhibiting value class cyclone (1) outlet downstream in center, produce
Wall-jets (7), formed to stay with main whirlpool (6) interaction and determine flame (5), and then form stable lift-off flame；Low equivalent ratio
Mixed gas enters from main combustion stage cyclone (2), forms main whirlpool (6) and wall-jets (7).
2. a kind of twin-stage twofold whirl nozzle for fuel gas low pollution combustor according to claim 1, it is special
Sign is：For described bent blade (11) established angle between 25 °~45 °, hollow circuit cylinder wheel hub (12) length is slightly larger than bent blade
(11) chord length；Level equivalent proportion on duty is between 0.6~1, and global equivalent proportion is between 0.2~0.3.
3. a kind of twin-stage twofold whirl nozzle for fuel gas low pollution combustor according to claim 1, it is special
Sign is：Described expansion segment outlet diameter is slightly less than main combustion stage cyclone (2) exit inside diameter, forms the platform that height is 2~5mm
Rank (24), produces small whirlpool in this place, by two-stage wall-jets (7) from a distance.
4. a kind of twin-stage twofold whirl nozzle for fuel gas low pollution combustor according to claim 1, it is special
Sign is：Described delta-blade (21) established angle is between 30 °~45 °；Main combustion stage cyclone (2) is set using strong swirling number
Meter, swirling number is between 0.8~1.26.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710717236.0A CN107543203B (en) | 2017-08-21 | 2017-08-21 | Two-stage composite swirl nozzle for gaseous fuel low-pollution combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710717236.0A CN107543203B (en) | 2017-08-21 | 2017-08-21 | Two-stage composite swirl nozzle for gaseous fuel low-pollution combustion chamber |
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| CN107543203A true CN107543203A (en) | 2018-01-05 |
| CN107543203B CN107543203B (en) | 2019-12-10 |
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| CN201710717236.0A Active CN107543203B (en) | 2017-08-21 | 2017-08-21 | Two-stage composite swirl nozzle for gaseous fuel low-pollution combustion chamber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006244A (en) * | 2019-12-03 | 2020-04-14 | 哈尔滨工程大学 | Flue gas backflow combustion chamber with variable rotational flow |
| CN115751305A (en) * | 2022-10-28 | 2023-03-07 | 北京工商大学 | Low-nitrogen combustor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1909030A2 (en) * | 2006-09-29 | 2008-04-09 | General Electric Company | Methods and apparatus to facilitate decreasing combustor acoustics |
| US20100326080A1 (en) * | 2005-09-30 | 2010-12-30 | Solar Turbines Incorporated | Acoustically Tuned Combustion for a Gas Turbine Engine |
| CN102022753A (en) * | 2010-12-31 | 2011-04-20 | 北京航空航天大学 | Low-pollution combustion chamber with premixed and pre-evaporated precombustion part |
| CN202303463U (en) * | 2011-10-13 | 2012-07-04 | 中国科学院工程热物理研究所 | Fuel oil and air mixing device for low-pollution combustion chamber |
| CN104180397A (en) * | 2014-07-25 | 2014-12-03 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Pre-mixing on-duty nozzle |
-
2017
- 2017-08-21 CN CN201710717236.0A patent/CN107543203B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100326080A1 (en) * | 2005-09-30 | 2010-12-30 | Solar Turbines Incorporated | Acoustically Tuned Combustion for a Gas Turbine Engine |
| EP1909030A2 (en) * | 2006-09-29 | 2008-04-09 | General Electric Company | Methods and apparatus to facilitate decreasing combustor acoustics |
| CN102022753A (en) * | 2010-12-31 | 2011-04-20 | 北京航空航天大学 | Low-pollution combustion chamber with premixed and pre-evaporated precombustion part |
| CN202303463U (en) * | 2011-10-13 | 2012-07-04 | 中国科学院工程热物理研究所 | Fuel oil and air mixing device for low-pollution combustion chamber |
| CN104180397A (en) * | 2014-07-25 | 2014-12-03 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Pre-mixing on-duty nozzle |
Non-Patent Citations (1)
| Title |
|---|
| 张昊等: "分级预混燃烧的稳定性", 《动力工程》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006244A (en) * | 2019-12-03 | 2020-04-14 | 哈尔滨工程大学 | Flue gas backflow combustion chamber with variable rotational flow |
| CN111006244B (en) * | 2019-12-03 | 2021-02-19 | 哈尔滨工程大学 | Flue gas backflow combustion chamber with variable rotational flow |
| CN115751305A (en) * | 2022-10-28 | 2023-03-07 | 北京工商大学 | Low-nitrogen combustor |
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| Publication number | Publication date |
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| CN107543203B (en) | 2019-12-10 |
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