CN203036629U - Combustion chamber structure - Google Patents
Combustion chamber structure Download PDFInfo
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- CN203036629U CN203036629U CN 201320001835 CN201320001835U CN203036629U CN 203036629 U CN203036629 U CN 203036629U CN 201320001835 CN201320001835 CN 201320001835 CN 201320001835 U CN201320001835 U CN 201320001835U CN 203036629 U CN203036629 U CN 203036629U
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- combustion
- combustion chamber
- swirl
- chamber structure
- flow devices
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Abstract
The utility model discloses a combustion chamber structure and relates to a stable combustion technology. The combustion chamber structure can be used for implementing multi-eddy combustion and improving the low-working-condition stability for combustion chambers of industrial and civil gas combustion devices and gas turbines. Combustion air of a combustion chamber head portion enters from a middle rotational flow device 1, an upper side rotational flow device 2 and a lower side rotational flow device 3, the middle rotational flow device 1 is installed on a head portion wall face 11, and under the assistance of opposite-injection combustion air streams 7 and 8, a plurality of backflow eddy areas 4, 5 and 6 are formed nearby the combustion chamber head portion. Fuel gas and the combustion air burn in one or a plurality of produced backflow eddies, and flames are transferred among backflow eddies. The combustion chamber structure has the advantages of being capable of achieving free transition and zooming of a plurality of combustion vortexes in flow areas adjacent to the head portion, adapting to changes of fuel quantities or air quantities, keeping the stable combustion and improving the lean blow-out performance.
Description
Technical field
The utility model relates to a kind of chamber structure at various value heat fuel, the stable combustion technology that belongs to gas fuel combustion, particularly at the not high combustion gas of those calorific values, the combustion gas that flame propagation velocity is low promotes the combustion stability of hanging down operating mode by the flow organization of burning.
Background technology
Broad stable operation range is an important performance indexes of burner.Stable operation range is subjected to the combustion chamber pitot loss, outlet temperature requires and restriction poor, the richextinction border.All working point must drop within the stability range of defined.The combustion chamber is poor puts out the important content that performance is Combustion stability study.The poor aspect problem of putting out has been done more correlative study both at home and abroad, promote aspect the combustion stability in the rationalization by the gas flow process, general adopt remain eddy flow cup burning head, just single eddy combustion method of typical eddy flow cup combustion chamber commonly used as shown in Figure 1.The air current composition in its primary zone comprises that eddy flow cup swirling eddy sprays, the sudden expansion when entering the primary zone reaches from the air subtend of primary holes and sprays.One of the main effect in vortex district is to provide continuity point burning things which may cause a fire disaster (high-temperature flue gas) to flammable fresh mix gas, so that igniting and smooth combustion continuously when igniter is not worked.This kind of characteristics are that recirculation zone and capacity of returns are excessive, the combustion stability when having influenced low operating mode.And the utility model improves at this exactly, promotes low operating mode combustion stability.
Summary of the invention
The purpose of this utility model is to provide the chamber structure of the low operating mode combustion stability of low calorific value gas fuel in a kind of the raising.Based on to low-BTU gas Study on Combustion Characteristics in this type of, provide a kind of better poor chamber structure characteristic, that efficiency of combustion is higher that puts out that in the confined space, has.
For achieving the above object, technical solution adopted in the utility model is:
A kind of chamber structure comprises head of combustion chamber and burner inner liner, it is characterized in that,
Swirl-flow devices in the middle of the middle part of described head of combustion chamber wall is provided with, the bilateral symmetry of swirl-flow devices is provided with at least two sidespins stream devices in the middle of described,
It is symmetrically arranged to the spray airport that the wall of the described burner inner liner of distance described head of combustion chamber a distance is provided with the axis of at least one pair of described relatively combustion chamber.
Preferably, described middle swirl-flow devices and described at least two sidespins stream device are axial swirler, or radial swirler, or the two combination.
Preferably, each swirl-flow devices is single-stage eddy flow or twin-stage eddy flow or multistage eddy flow.
Preferably, igniter places near middle swirl-flow devices place, or places near arbitrary described at least two sidespins stream device place.
Preferably, described at least two sidespins stream device comprises at least one upside swirl-flow devices and at least one downside swirl-flow devices, and the spray airport is comprised at least one going up spray airport and at least one down to the spray airport.
Chamber structure of the present utility model because the centrifugal action of eddy flow can form low-pressure area in the downstream central of next-door neighbour's swirl-flow devices, forms negative pressure gradient, makes the airflow reflux at rear portion form the vortex zone.To the spray air with down to spraying the down auxiliary of air, form a plurality of tight adjacent backflow vortex zones near the head of combustion chamber: middle vortex district, upside vortex district, downside vortex district last.
The path that fuel enters the vortex zone is: can enter from middle swirl-flow devices, also can enter respectively from middle swirl-flow devices and sidespin stream device simultaneously; The mode that enters can be: entering by cyclone, also can be to enter by nozzle or a large amount of jet apertures.Before entering, fuel and air generally, belong to half premixed combustion mode along journey diffusion and blending mutually, also are conducive to reduce pollutant emission.
Like this, fuel gas and combustion air burn in the one or more backflow vortexs that generate, and because each vortex next-door neighbour can transmit flame rapidly between the vortex mutually, are conducive to flameholding.And, when a vortex district point catches fire, other vortex districts of can igniting rapidly.
Simultaneously, this many vortexs zone fluidal texture that is different from single vortex district, eddy flow cup combustion chamber, disperseed big strand to reflux for the impact of flame stabilization, when a vortex district is flame-out, if other vortex district ignition conditions still exist, other vortex districts still can smooth combustion, thereby improve the poor performance of putting out, and promotes the combustion stability of low operating mode.
After fuel and air burn in many vortexs district, become that completing combustion or major part burnt on burning gases and burning gases down.Unburned composition completely burns fully at the flow field downstream area to the spray air with under down to the effect of spray air last.
Chamber structure of the present utility model has following outstanding feature with respect to prior art:
The utility model has utilized the method that single vortex zone is divided into a plurality of vortexs zone, entering each vortex zone after the continuous diffusion of fuel and combustion air and the blending burns respectively, each vortex has been shunted a part and has been come from spray air and the big burst of backflow that down the spray air is formed, reflux for the stable impact of single vortex internal combustion thereby weakened big strand, strengthened combustion stability.
The utility model is applicable to the middle burning of low calorific value gas fuel in the confined space, is conducive to promote its low operating mode combustion stability.
Description of drawings
Fig. 1 is single eddy combustion cell structure schematic diagram of using always.
Fig. 2 is chamber structure schematic diagram of the present utility model.
Element numbers explanation in the accompanying drawing:
Swirl-flow devices in the middle of 1,2 upside swirl-flow devices, 3 downside swirl-flow devices, in the middle of 4 the vortex districts, 5 upside vortex districts, 6 downside vortex districts, to the spray airport, 8 times to the spray airport on 7, burning gases on 9,10 times burning gases, 11 head walls
The specific embodiment
The utility model is a kind of many eddy combustions of the high-efficiency low-pollution cell structure that provides in confined space smooth combustion at middle low calorie fuels gas.Low calorie fuels gas improved combustion stability during the utility model was applicable to when hanging down operating mode.
Be to realize the foregoing invention content, the head of combustion chamber combustion air is entered, as shown in Figure 2 from being installed in middle swirl-flow devices 1 on the head wall 11 and upside swirl-flow devices 2 and downside swirl-flow devices 3.
Middle swirl-flow devices 1, upside swirl-flow devices 2 and downside swirl-flow devices 3 can be axial swirlers, it also can be radial swirler, or the combination of axial swirler and radial swirler, swirl-flow devices can be that the single-stage eddy flow also can be twin-stage eddy flow or multistage eddy flow.Last to spray airport 7 and on down to spray airport ejection 8 to spray air and down auxiliary to the spray air down, form a plurality of closely adjacent backflow vortex zones near the head of combustion chamber: middle vortex district 4, upside vortex district 5, downside vortex district 6.The path that fuel enters the vortex zone is: can enter from middle swirl-flow devices, also can enter respectively from middle swirl-flow devices and sidespin stream device simultaneously; The mode that enters can be: entering by cyclone, also can be to enter by nozzle or a large amount of jet apertures.Before entering, fuel and air generally, belong to half premixed combustion mode along journey diffusion and blending mutually, also are conducive to reduce pollutant emission.Fuel gas and combustion air burn in the one or more backflow vortexs that generate, and because each vortex next-door neighbour transmits flame mutually rapidly between the vortex.
When igniter placed close middle swirl-flow devices 1 to light a fire, flame passed to upside vortex district 5 and downside vortex district 6 from middle vortex district 4.When igniter places near 3 igniting of upside swirl-flow devices 2 or downside swirl-flow devices, flame from vortex district 5 or vortex district 6 pass in the middle of vortex district 4.Many vortexs zone fluidal texture has disperseed big strand to reflux for the impact of flame stabilization, and after a vortex district was flame-out, if other vortex district ignition conditions still exist, other vortex districts still can smooth combustion.After fuel and air burn in many vortexs district, burning gases 9 and burning gases 10 down on becoming.Unburned composition completely burns fully at the flow field downstream area to the spray air with under down to the effect of spray air last.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of the present utility model.
Claims (5)
1. a chamber structure comprises head of combustion chamber and burner inner liner, it is characterized in that,
Swirl-flow devices in the middle of the middle part of described head of combustion chamber wall is provided with, the bilateral symmetry of swirl-flow devices is provided with at least two sidespins stream devices in the middle of described,
It is symmetrically arranged to the spray airport that the wall of the described burner inner liner of distance described head of combustion chamber a distance is provided with the axis of at least one pair of described relatively combustion chamber.
2. chamber structure according to claim 1 is characterized in that, described middle swirl-flow devices and described at least two sidespins stream device are axial swirler, or radial swirler, or the two combination.
3. chamber structure according to claim 1 is characterized in that, each swirl-flow devices is single-stage eddy flow or twin-stage eddy flow or multistage eddy flow.
4. chamber structure according to claim 1 is characterized in that, igniter places near middle swirl-flow devices place, or places near arbitrary described at least two sidespins stream device place.
5. chamber structure according to claim 1, it is characterized in that, described at least two sidespins stream device comprises at least one upside swirl-flow devices and at least one downside swirl-flow devices, and the spray airport is comprised at least one going up spray airport and at least one down to the spray airport.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001835 CN203036629U (en) | 2013-01-04 | 2013-01-04 | Combustion chamber structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001835 CN203036629U (en) | 2013-01-04 | 2013-01-04 | Combustion chamber structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203036629U true CN203036629U (en) | 2013-07-03 |
Family
ID=48688748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320001835 Expired - Lifetime CN203036629U (en) | 2013-01-04 | 2013-01-04 | Combustion chamber structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203036629U (en) |
-
2013
- 2013-01-04 CN CN 201320001835 patent/CN203036629U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yuan Yixiang Inventor after: Chen Haisheng Inventor after: Yi Xiaolan Inventor after: Tan Chunqing Inventor after: Cao Wenyu Inventor after: Xie Pengfu Inventor after: Zeng Detang Inventor after: Zhan Dejun Inventor after: Yu Chao Inventor after: Chen Cong Inventor after: Gao Qing Inventor before: Yuan Yixiang Inventor before: Chen Haisheng Inventor before: Tan Chunqing Inventor before: Cao Wenyu Inventor before: Xie Pengfu Inventor before: Zeng Detang Inventor before: Zhan Dejun Inventor before: Yu Chao Inventor before: Chen Cong Inventor before: Gao Qing |
|
| CB03 | Change of inventor or designer information | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YUAN YIXIANG TAN CHUNQING CAO WENYU XIE PENGFU CENG DETANG ZHAN DEJUN YU CHAO CHEN CONG GAO QING CHEN HAISHENG TO: YUAN YIXIANG TAN CHUNQING CAO WENYU XIE PENGFU CENG DETANG ZHAN DEJUN YU CHAO CHEN CONG GAO QING CHEN HAISHENG YI XIAOLAN |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |
|
| CX01 | Expiry of patent term |