CN104896510B - Flame holder and ground gas turbine combustion chamber with same - Google Patents
Flame holder and ground gas turbine combustion chamber with same Download PDFInfo
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- CN104896510B CN104896510B CN201510242234.1A CN201510242234A CN104896510B CN 104896510 B CN104896510 B CN 104896510B CN 201510242234 A CN201510242234 A CN 201510242234A CN 104896510 B CN104896510 B CN 104896510B
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- flameholder
- ring
- radial strut
- cyclone
- combustion
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Abstract
The invention discloses a flame holder and a ground gas turbine combustion chamber with the same. The flame holder comprises a central ring and a plurality of radial struts fixed on the outer circular face of the central ring along the radial direction uniformly. A ring body of the central ring and the radial struts are formed by members in groove structures, and groove opening directions of the central ring and the radial struts are identical. Gas flow channels are formed in the members in groove structures and are communicated with the outside through a plurality of gas spray holes in the bottoms of the grooves. The gas flow channel in the central ring and the gas flow channels in the radial struts are communicated to form a gas flow cavity with the shape corresponding to the shape of the flame holder. By means of the flame holder, fuel gas can be burnt stably on the flame holder even under the impact of high-speed gas flows.
Description
Technical field
The present invention relates to gas turbine field, in particular to a kind of flameholder, further relate to one kind and this is installed
The ground combustion machine combustor of flameholder.
Background technology
Environmental consciousness with people is generally strengthened, and countries in the world have all worked out pollution regulations (method) accordingly, right
The pollutant effulent of various combustion apparatus and power set proposes the restriction of increasingly stringent.Although twentieth century eighties is to 90
There is the regulation of international law during age, make many country sulfur dioxide (so2) discharge capacity significantly reduce, but nitrogen oxides
(nox) decrement is relatively fewer.noxIt has been increasingly becoming the key of various countries' pollution emission control, because it is compound pollution
Key pollutants, and a series of environmental problem can be brought.Dry type low nox (dln) combustion technology is according to heating power type nox
Zeldovich generating principle, by combustor primary zone temperature restraint in the narrow range of 1670-1900k to reduce discharging nox, because
This must adopt premixed combustion mode, controls flame temperature by the fuel/air mixture equivalent proportion adjusting primary zone.But only control
Average equivalent ratio is not met by requiring, and all dln combustor require that fuel/air mixture uniformly premixes.Advanced dln combustion in the world
The research and development burning room all take very big energy on fuel/air premix homogeneity question.
Fig. 1 is the structural representation of existing general dry type low-nitrogen oxide discharging combustor, as shown in figure 1, combustion barrel
Indoor located at burning, the inlet end of combustion barrel is provided with end plate, end plate is fixed with cyclone on duty and around cyclone on duty 8
Individual main cyclone device.Cyclone is made up of whirl cylinder 4,5 and blade 41,31, and blade 41,31 is around the centre bore setting at middle part.Main
Combustion level jet pipe 1 penetrates main cyclone cylinder 4 from the centre bore at main cyclone device blade 41 middle part, and level jet pipe 3 on duty is from cyclone on duty
The centre bore at blade 31 middle part penetrates in whirl cylinder 5 on duty.Main cyclone cylinder 4 afterbody is restrained, whirl cylinder 5 afterbody expansion on duty.
In order to strengthen degree of mixing and prevent from being tempered, main cyclone cylinder 4 afterbody devises converging portion, to accelerate unreacted fuel gas
Stream.But it is so designed that and makes, downstream in a suitable segment distance, to catch fire because air velocity is too high, waste combustor
Space, and increased combustion gas in the burning indoor time of staying, increase the generation of pollutant.
Content of the invention
First technical problem to be solved by this invention is to provide a kind of flameholder, and this flameholder can make it
On flame stabilization burning.
The present invention solves above-mentioned technical problem by following technological means: a kind of flameholder is it is characterised in that include
Center ring and radially even several radial strut, the ring body of described center ring and the institute being fixed on center ring outer ring surface
State radial strut to be all made up of the component of groove-like structure, and described center ring is identical with the notch direction of described radial strut, institute
State and in the component of groove-like structure, be provided with gas channel, multiple fumaroles that described gas channel is arranged by bottom land are connected with extraneous
Logical, the gas channel in described center ring and described radial strut communicates with each other, and forms a shape and described flameholder
Corresponding air flow chamber.
After combustion gas inputs described air flow chamber, the fumarole from described member slots bottom sprays, with combustion-supporting gas such as air contact
Complete to burn, the component of groove-like structure can stop the impact of external air flow well, enable combustion gas to realize in flameholder
Stable burning.
The free end of described radial strut is all connected with the inner ring surface of a connection ring, to strengthen whole flameholder
Mechanical strength.
Second technical problem to be solved by this invention is to provide a kind of ground combustion machine with described flameholder
Combustor, described combustor includes combustion barrel, and the inlet end of described combustion barrel is provided with cyclone on duty and around described rotation on duty
, it is characterised in that being additionally provided with described flameholder in described combustion barrel, described flame is steady for several main cyclone devices of stream device
Determine the downstream that device is fixed on described cyclone by its radial strut or connection ring, the quantity of described radial strut and described main rotation
The quantity of stream device corresponds to, and the gap between each described main cyclone device and two neighboring described radial strut is relative, described burning
Cylinder also includes Gas Pipe, and described Gas Pipe puts in combustion barrel inside and described flameholder phase from the inlet end of described combustion barrel
Even, and connect with the air flow chamber of described flameholder.
Described flameholder and the distance between described main cyclone device scope are 20～40mm.
The nozzle phase of the whirl cylinder expansion on duty of the ring body of the center ring of described flameholder and described cyclone on duty
Right, described main cyclone device blade center hole is relative with the middle part in the gap between radial strut described in adjacent two, is easy to reduce fire
The resistance to main inverter and inverter downstream airflow on duty for the flame regulator.
The quantity of the fumarole in each described radial strut is 1 or 2, is distributed in the middle part of described radial strut；Institute
The quantitative range stating the fumarole on center ring is 10～20, is uniformly distributed；The diameter range of described fumarole be 0.9mm～
1.5mm.
As a further improvement on the present invention: the whirl cylinder of several described main cyclone devices is connected as a single entity, form an annular
Structure, is made up of the external annulus and internal ring wall of alternate setting, and described external annulus and internal ring wall are located between them by some pieces
Connecting plate connects together, the blade of each main cyclone device correspondingly in the gap between two connecting plates, described external annulus
Mutually close with the afterbody of described internal ring wall, form the converging portion of main cyclone cylinder, the converging portion of each main cyclone device communicates with each other, that is, do not have
Connected plate is had to separate, described internal ring wall is connected with the whirl cylinder on duty of described cyclone on duty, and described external annulus are fixed on institute
State on the inwall of combustion barrel or be integrated with the inwall of described combustion barrel.
As the preferred embodiment of the present invention: be axially arranged with several fins inside described external annulus, have in fin
One through hole running through its both ends of the surface, described Gas Pipe passes through from the through hole of described fin, nearby with described flameholder
Radial strut is connected, and described connecting plate is fixed on described fin correspondingly.
With respect to prior art, the invention has the following beneficial effects:
1) due to increasing gas injection exit point, (spray site is no longer confined to main combustion stage jet pipe value preset class jet pipe to the present invention, fire
Multiple fumaroles on flame regulator also constitute gas injection exit point), be conducive to making combustion gas and air mixedly more uniform, from
And be conducive to eliminating the appearance of localized hyperthermia's point, make burning more abundant；
2) present invention passes through to arrange flameholder, and a part of combustion gas is sent directly into flameholder, steady by flame
The multiple fumaroles determined on device spray, due to the construction featuress of flameholder itself, even if in cyclone downstream high velocity air
Impact under, combustion gas also can stable on flameholder be burnt, so that combustion gas can be burnt in combustion barrel head；In addition, by
In the shunting action to main combustion stage jet pipe for the flameholder of the present invention, advantageously reduce the combustion gas speed in main cyclone device downstream, contracting
Short combustion gas ignition point is with a distance from cyclone；The whirl cylinder of main cyclone device of the present invention is connected as a single entity, the converging portion of each main cyclone cylinder
Communicate with each other, be also beneficial to reduce the speed of main cyclone cylinder downstream combustion gas, so that combustion gas is burnt in combustion barrel head；The present invention shortens
Combustion gas ignition point, with a distance from cyclone, enables combustion gas to burn in combustion barrel head, is conducive to sufficiently utilizing the interior of combustion barrel
Portion space, reduces the time of staying in combustion barrel for the combustion gas, reaches the purpose of the discharge capacity reducing pollutant, is additionally favorable for making burning
The structure of room is compacter.
Brief description
Fig. 1 is the sectional view of the structural representation of existing general dry type low-nitrogen oxide discharging combustor；
Fig. 2 is the rearview of the flameholder of the specific embodiment of the invention；
Fig. 3 is the sectional view of the component of groove-like structure constituting Fig. 2 Flame regulator；
Fig. 4 is the front view of Fig. 2 Flame regulator；
Fig. 5 is the sectional view of the structural representation of combustion barrel of the specific embodiment of the invention；
Fig. 6 is the left view of combustion barrel in Fig. 5.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described in further detail:
As shown in figs. 2 to 4, the flameholder of the present embodiment include 7, eight radial strut of center ring 6 (radial strut
Quantity is corresponding with the quantity of main cyclone device in combustion barrel) and connection ring.Center ring 7 abreast in the middle part of connection ring, eight footpaths
To pillar 6 radially even be fixed on center ring 7 outer ring surface, free end is connected with the inner ring surface of connection ring.
The ring body of center ring 7 and radial strut 6 are all made up of the component of groove-like structure.As shown in figure 3, the structure of groove-like structure
Part is made up of upper and lower two arcwall faces, and two arcwall face both sides overlap, intermediate formation cavity, constitutes gas channel.As Fig. 4
Shown, gas channel is in communication with the outside by multiple fumaroles 11 that bottom land is arranged.Center ring 7 and the notch side of radial strut 6
To identical, the gas channel in center ring 7 and radial strut 6 communicates with each other, and forms a shape corresponding with flameholder
Air flow chamber.After combustion gas input air flow chamber, spray from the fumarole 11 at the member slots bottom of groove-like structure, complete to fire with air contact
Burn, the cell wall of the component of groove-like structure can stop rushing of the high velocity air that main combustion stage jet pipe 1 value preset class jet pipe 3 sprays well
Hit, enable combustion gas that stable burning to be realized on flameholder.
The quantity of the fumarole in each radial strut 6 is 1 or 2, is distributed in the middle part of radial strut, distance center ring
In the range of 7 center 95～130mm；The quantitative range of the fumarole on center ring 7 is 10～20, is uniformly distributed；Fumarole
Diameter range is 0.9mm～1.5mm.
Ground combustion machine combustor includes several burners, and burner is evenly arranged along unit circumferencial direction, and oblique cutting enters combustion
Burning in chamber enclosure. combustor outer casing is connected integral with combustor and compressor cylinder.Burner (includes master by fuel nozzle group
Combustion level jet pipe value preset class jet pipe), combustion barrel, changeover portion and bypass valve and adnexa composition.Bypass valve can control the combustion of fuel
Burn, stablize flame, prevent detonation.
As shown in figure 5, being provided with cyclone on duty and eight masters around cyclone on duty in the middle part of the inlet end of combustion barrel
Cyclone.Cyclone is made up of whirl cylinder, blade, blade be located at whirl cylinder in, middle part of blade has centre bore, blade around in
Heart hole is arranged.As shown in Figure 5,6, main combustion stage jet pipe 1 penetrates main cyclone cylinder 4 from the centre bore 10 at main cyclone device blade 41 middle part
In, level jet pipe 3 on duty penetrates whirl cylinder 5 on duty from the centre bore 8 at swirler blades 31 middle part on duty.Eight main cyclone devices
Whirl cylinder 4 is connected as a single entity, and forms a loop configuration, is made up of the external annulus 42 and internal ring wall 43 of alternate setting.External annulus 42 He
Internal ring wall 43 is connected together by some pieces of connecting plates 44 being located between them, and the blade 41 of each main cyclone device sets correspondingly
In the gap between two adjacent connecting plates 44.External annulus 42 are mutually close with the afterbody of internal ring wall 43, form main cyclone cylinder
Converging portion, the converging portion of each main cyclone device communicates with each other, and is not connected plate 44 and separates.External annulus 42 are fixed on combustion barrel
It is integrated on inwall or with the inwall of combustion barrel, the converging portion of each main cyclone cylinder communicates with each other, eddy flow can be reduced further
The speed of cylinder downstream combustion gas.In addition, the whirl cylinder of annular, be conducive to mitigating the weight of combustion barrel, simplify the structure of combustion barrel.Main
The distance between the external annulus 42 of whirl cylinder and internal ring wall 43, front end is the 1/4～1/3 of combustion barrel diameter, converging portion two wall
Convergent angle scope is 20 °～30 °.Whirl cylinder 5 afterbody expansion on duty, internal ring wall 43 front end and whirl cylinder front end on duty are connected in one
Rise.External annulus 42 are integrated with the inwall of combustion barrel.
Combustion barrel also includes some Gas Pipe 16, and Gas Pipe 16 is from the inlet end of combustion barrel along the outer shroud of main cyclone cylinder
Wall 42 puts in inside combustion barrel, and away from wall 2～5mm, concrete structure is: it is axially arranged with several fins 9 inside external annulus 42, convex
There is in rib 9 through hole running through its both ends of the surface, connecting plate 44 is fixed on fin 9 correspondingly, every Gas Pipe 16 from
Pass through in the through hole of one fin 9, in the converging portion of main cyclone cylinder, with 20 °～30 ° of the inside lateral bend of external annulus 42, and nearby
It is connected with the radial strut 6 of flameholder, and connects with the air flow chamber of flameholder, combustion gas is input into flameholder
Air-flow intracavity.
Flameholder is fixed in combustion barrel by its external ring, positioned at cyclone downstream, the main rotation with main cyclone device
The distance between the internal ring wall 43 of flow cartridge scope is 20～40mm.The ring body of the center ring of flameholder and cyclone on duty
The nozzle of whirl cylinder 5 expansion on duty is relative, in the gap between main cyclone device blade center hole 10 and adjacent two radial strut 6
Portion is relatively.This structure is mainly for reducing the resistance to stream under main inverter and inverter on duty for the flameholder.
Above-described embodiment is only a preferred embodiment of the present invention, should not become the limit to the scope of the present invention
System, the specific embodiment of the present invention does not limit above-described embodiment.According to the above of the present invention, according to the common skill of this area
Art knowledge and customary means, under the premise of without departing from the present invention above-mentioned basic fundamental thought, it is many that the present invention can also make other
Modification, replacement or the change of the form of kind, all should fall in rights protection scope of the present invention.
Claims (8)
1. a kind of flameholder is it is characterised in that including center ring and radially even being fixed on center ring outer ring surface
Several radial strut, the ring body of described center ring and described radial strut be all made up of the component of groove-like structure, and described
Center ring is identical with the notch direction of described radial strut, is provided with gas channel in the component of described groove-like structure, described air-flow
Passage is in communication with the outside by multiple fumaroles that bottom land is arranged, the gas channel in described center ring and described radial strut that
This connection, one shape of formation air flow chamber corresponding with described flameholder.
2. flameholder according to claim 1 is it is characterised in that the free end of described radial strut is all connected with one
The inner ring surface of ring is connected.
3. a kind of ground combustion machine combustor with flameholder described in claim 2, described combustor includes combustion barrel,
The inlet end of described combustion barrel is provided with cyclone on duty and several main cyclone devices around described cyclone on duty, and its feature exists
In being additionally provided with described flameholder in described combustion barrel, it is solid that described flameholder passes through its radial strut or connection ring
It is scheduled on the downstream of described cyclone, the quantity of described radial strut is corresponding with the quantity of described main cyclone device, each described main rotation
Stream device relative with the gap between two neighboring described radial strut, described combustion barrel also includes Gas Pipe, described Gas Pipe from
The inlet end of described combustion barrel is put in and is connected with described flameholder inside combustion barrel, and the air-flow with described flameholder
Chamber connects.
4. ground combustion machine combustor according to claim 3 is it is characterised in that described flameholder and described main cyclone
The distance between device scope is 20～40mm.
5. ground combustion machine combustor according to claim 4 is it is characterised in that the ring of the center ring of described flameholder
The nozzle of the whirl cylinder expansion on duty of body and described cyclone on duty is relative, described main cyclone device blade center hole and adjacent two institutes
State the middle part in gap between radial strut relatively.
6. ground combustion machine combustor according to claim 3 is it is characterised in that fumarole in each described radial strut
Quantity be 1 or 2, be distributed in the middle part of described radial strut；The quantitative range of the fumarole on described center ring be 10～
20, it is uniformly distributed；The diameter range of described fumarole is 0.9mm～1.5mm.
7. the ground combustion machine combustor according to claim 3～6 any one claim is it is characterised in that several institutes
The whirl cylinder stating main cyclone device is connected as a single entity, and forms a loop configuration, is made up of the external annulus and internal ring wall of alternate setting, described
External annulus and internal ring wall are connected together by some pieces of connecting plates being located between them, and the blade of each main cyclone device is correspondingly
In the gap between two connecting plates, described external annulus are mutually close with the afterbody of described internal ring wall, form the receipts of main cyclone cylinder
Hold back section, the converging portion of each main cyclone device communicates with each other, be connected plate and separate, described internal ring wall and described cyclone on duty
Whirl cylinder on duty be connected, described external annulus are fixed on the inwall of described combustion barrel or are combined into one with the inwall of described combustion barrel
Body.
8. ground combustion machine combustor according to claim 7 is it is characterised in that be axially arranged with some inside described external annulus
Individual fin, has a through hole running through its both ends of the surface in fin, described Gas Pipe passes through from the through hole of described fin, nearby with
The radial strut of described flameholder is connected, and described connecting plate is fixed on described fin correspondingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242234.1A CN104896510B (en) | 2015-05-13 | 2015-05-13 | Flame holder and ground gas turbine combustion chamber with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242234.1A CN104896510B (en) | 2015-05-13 | 2015-05-13 | Flame holder and ground gas turbine combustion chamber with same |
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| Publication Number | Publication Date |
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| CN104896510A CN104896510A (en) | 2015-09-09 |
| CN104896510B true CN104896510B (en) | 2017-02-01 |
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| CN201510242234.1A Active CN104896510B (en) | 2015-05-13 | 2015-05-13 | Flame holder and ground gas turbine combustion chamber with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178637A (en) * | 2020-08-17 | 2021-01-05 | 上海交通大学 | Flame stabilizing device convenient to adjust incoming flow |
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| CN105674333A (en) * | 2016-01-12 | 2016-06-15 | 西北工业大学 | Combustion chamber structure of ground combustion engine and staged combustion organization method of combustion chamber structure |
| CN105465831A (en) * | 2016-01-12 | 2016-04-06 | 西北工业大学 | Gas turbine combustion chamber provided with double flame tubes and flame holder |
| CN105650680A (en) * | 2016-01-19 | 2016-06-08 | 西北工业大学 | Head design of combustion chamber of twin-stage premixing ground-based gas turbine |
| CN105650679A (en) * | 2016-01-19 | 2016-06-08 | 西北工业大学 | Combustion chamber of ground combustion engine with premixed third-class rotational flow part |
| KR102063169B1 (en) * | 2017-07-04 | 2020-01-07 | 두산중공업 주식회사 | Fuel nozzle assembly and combustor and gas turbine having the same |
| CN112050256B (en) * | 2020-09-18 | 2022-03-08 | 中国航发四川燃气涡轮研究院 | Ground gas turbine combustion chamber head with multi-stage rotational flow and partial premixing |
| CN114440259B (en) * | 2021-12-14 | 2023-01-17 | 西安航天动力研究所 | Spliced flame stabilizing device with multiple oil supply paths |
| CN115574347B (en) * | 2022-09-16 | 2023-12-29 | 南京航空航天大学 | Single-inlet single-resident cavitation chamber stabilizer for afterburner |
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| CN112178637B (en) * | 2020-08-17 | 2021-08-03 | 上海交通大学 | Flame stabilizing device convenient to adjust incoming flow |
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|---|---|
| CN104896510A (en) | 2015-09-09 |
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