CN204717741U - A kind of gas-turbine combustion chamber head construction - Google Patents
A kind of gas-turbine combustion chamber head construction Download PDFInfo
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- CN204717741U CN204717741U CN201520231330.1U CN201520231330U CN204717741U CN 204717741 U CN204717741 U CN 204717741U CN 201520231330 U CN201520231330 U CN 201520231330U CN 204717741 U CN204717741 U CN 204717741U
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Abstract
The utility model relates to gas turbine technology field, particularly relates to a kind of gas-turbine combustion chamber head construction.It comprises central nozzle, peripheral injector nozzles, cover cap, center mixing tube and peripheral mixing tube, the arranged outside of peripheral mixing tube has peripheral cold gas sweep device, cover cap outside air enters peripheral cooling blow device, the downstream injection of cold air at peripheral injector nozzles blows out by peripheral cooling blow device, fraction in peripheral cooling blow device flows to center cooling blow device, so that the downstream injection of cold air at central nozzle is blown out, air is sprayed by the mixing tube end from peripheral injector nozzles and central nozzle downstream, airflow layer is formed in mixing tube downstream, this airflow layer can split the flowing of the bluster of central nozzle and peripheral injector nozzles in certain length, thus substitute the function of a part of former solids mixing pipe, the length of such solids mixing pipe can suitably reduce, thus reduce the axial length of head construction, make head of combustion chamber compact conformation, save cost.
Description
Technical field
The utility model relates to gas turbine technology field, particularly relates to a kind of gas-turbine combustion chamber head construction.
Background technology
Because the requirement of environmental protection is more and more stricter, in gas turbine burner in recent years, use the mode of premixed combustion to reduce the discharge of pollutant more and more.By fuel and air being pre-mixed the flammable mixture into homogeneous phase, its combustion system is made to be converted into premixed combustion by traditional diffusion combustion, thus the peak temperature that can reduce in combustion chamber, and then the discharge of nitrogen oxide (NOx) can be reduced.
In order to reach lower pollutant emission level, the mixture leaving the fuel and air that nozzle enters into the conversion zone of burner inner liner must be very even.If there is the region that Fuel-air mixing intensity is significantly higher than mean value in flow field, the temperature of the combustion product so in these regions will higher than mean temperature.And during high temperature, produce a very important reason of nitrogen oxide (NOx).If there is the remarkable sub-average region of Fuel-air mixing intensity in flow field, the temperature of the combustion product so in these regions will lower than mean temperature.May be there is quenching or incomplete combustion in these regions, thus increase the discharge of carbon monoxide (CO) and unburned hydrocarbon (UHC).So improving Fuel-air mixing intensity is the major issue that pre-mixing nozzle will solve.
Adopt in the head of combustion chamber structure of premixed combustion mode typical, generally comprise one and be arranged in the central nozzle at center and multiple peripheral injector nozzles being arranged in central nozzle surrounding equably.Central nozzle and peripheral injector nozzles are arranged in cover cap, and cover cap is provided with mixing tube.Air from compressor produces eddy current through nozzle cyclone, and mixes in mixing tube with the fuel gas that nozzle sprays, and the gas after having mixed is injected in burner inner liner and burns.In order to ensure mixing intensity, on cover cap, the length of premix barrel is generally at about 200mm.But the requirement of mixing tube length causes cover cap axially longer, causes higher manufacturing cost.
Therefore, for above deficiency, the utility model provides a kind of gas-turbine combustion chamber head construction.
Utility model content
(1) technical problem that will solve
The purpose of this utility model is to provide a kind of gas-turbine combustion chamber head construction shortening axial length, with cost-saving, make structure compacter and promote combustion chambers burn performance.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of gas-turbine combustion chamber head construction, it comprises central nozzle, peripheral injector nozzles, cover cap, center mixing tube and peripheral mixing tube, center mixing tube and peripheral mixing tube are arranged on the inner side of cover cap, the end of central nozzle and peripheral injector nozzles is stretched in center mixing tube inside cover cap and peripheral mixing tube respectively, the arranged outside of center mixing tube has center cold gas sweep device, the arranged outside of peripheral mixing tube has peripheral cold gas sweep device, described center cold gas sweep device is connected with peripheral cold gas sweep device, described peripheral cold gas sweep device is communicated with cover cap outside air.
Wherein, described center cold gas sweep device is corresponding with the downstream position of described central nozzle and peripheral injector nozzles respectively with the position of peripheral cold gas sweep device.
Wherein, described peripheral cold gas sweep device is communicated with cover cap outside air by least one air inlet pipe.
Wherein, described center cold gas sweep device is communicated with by tube connector with peripheral cold gas sweep device.
Wherein, described peripheral cold gas sweep device comprises the collection chamber, the rectification room that are communicated with successively and goes out air cleft, and described collection chamber is communicated with air inlet pipe, outside the tube wall of described rectification room around peripheral mixing tube, described in go out air cleft and be opened on end plate.
Wherein, described center cold gas sweep device comprises the collection chamber, the rectification room that are communicated with successively and goes out air cleft, and described collection chamber is communicated with tube connector, outside the tube wall of described rectification room around center mixing tube, described in go out air cleft and be opened on end plate.
Wherein, the width going out air cleft described in is 1 ~ 4mm.
Wherein, the circulation area of described collection chamber is 5 ~ 15 times that air cleft area.
Wherein, the circulation area of described rectification room is 1 ~ 2 times that air cleft area.
Wherein, the number of described peripheral injector nozzles is at least four.
(3) beneficial effect
Technique scheme tool of the present utility model has the following advantages: in the gas-turbine combustion chamber head construction of the shortened axial length that the utility model provides, the arranged outside of peripheral mixing tube has peripheral cold gas sweep device, cover cap outside air enters peripheral cooling blow device, the downstream injection of cold air at peripheral injector nozzles blows out by peripheral cooling blow device, the arranged outside of center mixing tube has center cold gas sweep device, fraction in peripheral cooling blow device flows to center cooling blow device, the downstream injection of cold air at central nozzle blows out by center cooling blow device, air is sprayed like this by the mixing tube end from peripheral injector nozzles and central nozzle downstream, airflow layer is formed in mixing tube downstream, this airflow layer effectively can split the flowing of the bluster of central nozzle and peripheral injector nozzles in certain length, thus substitute the function of a part of former solids mixing pipe, in such cover cap, the length of solids mixing pipe can suitably reduce, thus reduce the axial length of head of combustion chamber structure, make head of combustion chamber structure compacter, save cost, the cold air flow further downstream introduced, finally participates in burning, decreases the waste of simple cold gas, improve combustion chamber overall performance.
Accompanying drawing explanation
Fig. 1 is the utility model gas-turbine combustion chamber head construction generalized section;
Fig. 2 is the structure sectional view of cover cap and cover cap inner part in the utility model gas-turbine combustion chamber head construction;
Fig. 3 is cold gas sweep device schematic diagram in B place in Fig. 2.
In figure, 1: central nozzle; 2: peripheral injector nozzles; 3: cover cap; 31: end plate; 32: cooling air inlet; 33: diffusion cooling hole; 34: center mixing tube; 35: peripheral mixing tube; 4: cold gas sweep device; 41: center cold gas sweep device; 42: peripheral cold gas sweep device; 421: tube connector; 411: air inlet pipe; 401: collection chamber; 402: rectification room; 403: go out air cleft.
Detailed description of the invention
Below in conjunction with drawings and Examples, detailed description of the invention of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As depicted in figs. 1 and 2, the gas-turbine combustion chamber head construction that the utility model provides comprises central nozzle 1, six peripheral injector nozzles 2, cover cap 3, center mixing tube 34 and peripheral mixing tube 35, six peripheral injector nozzles 2 annulars are evenly arranged at outside central nozzle 1, center mixing tube 34 and peripheral mixing tube 35 are arranged on the inner side of cover cap 3, the end of central nozzle 1 and peripheral injector nozzles 2 is stretched in center mixing tube 34 inside cover cap 3 and peripheral mixing tube 35 respectively, the arranged outside of center mixing tube 34 has center cold gas sweep device 41, the arranged outside of peripheral mixing tube 35 has peripheral cold gas sweep device 42, described center cold gas sweep device 41 is connected with peripheral cold gas sweep device 42, described peripheral cold gas sweep device 42 is communicated with cover cap 3 outside air, center cold gas sweep device 41 is corresponding with the downstream position of described central nozzle 1 and peripheral injector nozzles 2 respectively with the position of peripheral cold gas sweep device 42.Certainly, the number of above-mentioned peripheral injector nozzles 2 is not limited to six and also can be set to other numbers.
In above-described embodiment, the arranged outside of peripheral mixing tube 35 has peripheral cold gas sweep device 42, cover cap 3 outside air enters peripheral cooling blow device, the downstream injection of cold air at peripheral injector nozzles 2 blows out by peripheral cooling blow device, the arranged outside of center mixing tube 34 has center cold gas sweep device 41, fraction in peripheral cooling blow device flows to center cooling blow device, the downstream injection of cold air at central nozzle 1 blows out by center cooling blow device, air is sprayed like this by the mixing tube end from peripheral injector nozzles 2 and central nozzle 1 downstream, airflow layer is formed in mixing tube downstream, this airflow layer effectively can split the flowing of the bluster of central nozzle 1 and peripheral injector nozzles 2 in certain length, thus substitutes the function of a part of former solids mixing pipe.Particularly, in cover cap 3, the length of solids mixing pipe can suitably reduce, thus reduce the axial length of head construction, make head of combustion chamber structure compacter, cover cap 3 length also can shorten, and will save the material manufacturing and need, simultaneously, compact structure difficulty of processing also can reduce, and reduces processing and manufacturing cost further; Air layer replaces traditional solids mixing pipe, and head solid area is increased from the distance of burner inner liner combustion zone, so high-temperature fuel gas reduces for the radiation of head construction, the temperature of head construction correspondingly reduces, and contributes to the life-span of improving head construction like this; The cold air flow further downstream introduced, finally participates in burning, decreases the waste of simple cold gas, improve combustion chamber overall performance.
Further, described peripheral cold gas sweep device 42 is communicated with cover cap 3 outside air by least one air inlet pipe 411; Described center cold gas sweep device 41 is communicated with by tube connector 421 with peripheral cold gas sweep device 42.Particularly, peripheral blow device 42 and center blow device 41 are loop configuration, are coaxially arranged on the outside of peripheral mixing tube 35 and center mixing tube 34 respectively.Wherein, each peripheral blow device 42 is arranged at least one air inlet pipe 411 to be communicated with cover cap 3 outside air, center blow device 41 is arranged tube connector 421 that is equal with peripheral injector nozzles 2 number or its multiple and be evenly connected with the peripheral blow device 42 outside peripheral injector nozzles 2; Cover cap 3 outer air enters peripheral blow device 42 by air inlet pipe 411, and a part of gas enters into center blow device 41 by tube connector 421 again, and the downstream injection of cold air at central nozzle 1 blows out by center cooling blow device.
Particularly, as shown in Figure 3, described peripheral cold gas sweep device 42 comprises the collection chamber 401, the rectification room 402 that are communicated with successively and goes out air cleft 403, and collection chamber 401 is communicated with air inlet pipe 411, outside the tube wall of rectification room 402 around peripheral mixing tube 35, go out air cleft 403 and be opened on end plate 31.
Certainly, described center cold gas sweep device 41 and peripheral cold gas sweep device 42 similar, it comprises the collection chamber 401, the rectification room 402 that are communicated with successively and goes out air cleft 403, collection chamber 401 is communicated with tube connector 421, outside the tube wall of rectification room 402 around center mixing tube 34, go out air cleft 403 and be opened on end plate 31.
In above-described embodiment, collection chamber 401 is for storing cold air, namely comes from the air of compressor; Collection chamber 401 specification is incorporated into out air cleft 403 by rectification room 402, makes to have consistent speed and flow direction from going out air cleft 403 effluent air, thus forms complete and concentrated airflow layer.
In order to reach the airflow layer intensity of needs with less air conditioning quantity, preferably, the width going out air cleft 403 described in is 1 ~ 4mm; Go out arranging of air cleft 403 and can ensure that the maximal rate of air-flow is in exit, also facilitate the flow controlling cold air simultaneously.
Further, the circulation area of described collection chamber 401 is 5 ~ 15 times that air cleft 403 area; The circulation area of rectification room 402 is 1 ~ 2 times that air cleft 403 area.
Preferably, as shown in Figure 1, cover cap 3 side arm also offers cooling air inlet 32, end plate 31 offers diffusion cooling hole 33, it is inner that the portion of air entered in cover cap 3 enters into cover cap 3 by the cooling air inlet 32 on cover cap 3, spray from diffusion cooling hole 33, for the end plate 31 of cooling surface to high-temperature fuel gas.
Preferably, the cooling gas flow that described cold gas sweep device 4 is introduced accounts for 2% ~ 8% of combustion chamber total flow.Cooling tolerance is lower, affects less, can directly apply and the gas-turbine combustion chamber designed burning tissues and distribution.
The course of work of the gas-turbine combustion chamber head construction that the utility model provides is: to be entered into by the cyclone on central nozzle 1 and peripheral injector nozzles 2 from the portion of air of compressor and be arranged on center mixing tube 34 in cover cap 3 and peripheral mixing tube 35, enter into burner inner liner burn with central nozzle 1 and peripheral injector nozzles 2 after the gaseous fuel sprayed mixes; It is inner that another part air enters into cover cap 3 by the cooling air inlet 32 on cover cap 3, sprays, for the end plate 31 of cooling surface to high-temperature fuel gas from diffusion cooling hole 33; Cold gas sweep device 4 of the present utility model is arranged on nozzle downstream, cover cap 3 is inner, by at center mixing tube 34 and peripheral mixing tube 35 end injected cool air, realize splitting the flowing of central nozzle 1 gaseous mixture and the flowing of each peripheral injector nozzles 2 gaseous mixture in the segment distance of cover cap 3 downstream one, the airflow layer that cold air is formed plays the effect same with center mixing tube 34 and peripheral mixing tube 35, thus can reduce the length of center mixing tube 34 and peripheral mixing tube 35; Air inlet pipe 411 and tube connector 421 make the flowing specification more of the air flowing into cold gas sweep device 4 outside cover cap 3, farthest reduce the flow losses that sinuous flow brings, improve pressure drop, thus improve the axial velocity the airflow layer that air cleft 403 flows out; The axial velocity of airflow layer is higher, and the effect of the segmentation flowing played is better, and shunting length is longer.
The utility model has following outstanding effect: the first, cover cap 3 contraction in length, and will save the material manufacturing and need, meanwhile, compact structure difficulty of processing also can reduce, and reduces processing and manufacturing cost further; Second, air layer replaces traditional solids mixing pipe, and head solid area is increased from the distance of burner inner liner combustion zone, so high-temperature fuel gas reduces for the radiation of head construction, the temperature of head construction correspondingly reduces, and contributes to the life-span of improving head construction like this; 3rd, the cold air flow further downstream of introducing, finally participates in burning, decreases the waste of simple cold gas, improve combustion chamber overall performance; In addition, head temperature reduces, and also can reduce, save cold gas further for the air conditioning quantity of cooling surface to the end plate 31 of high-temperature fuel gas.
The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (10)
1. a gas-turbine combustion chamber head construction, it is characterized in that: it comprises central nozzle, peripheral injector nozzles, cover cap, center mixing tube and peripheral mixing tube, center mixing tube and peripheral mixing tube are arranged on the inner side of cover cap, the end of central nozzle and peripheral injector nozzles is stretched in center mixing tube inside cover cap and peripheral mixing tube respectively, the arranged outside of center mixing tube has center cold gas sweep device, the arranged outside of peripheral mixing tube has peripheral cold gas sweep device, described center cold gas sweep device is connected with peripheral cold gas sweep device, described peripheral cold gas sweep device is communicated with cover cap outside air.
2. gas-turbine combustion chamber head construction according to claim 1, is characterized in that: described center cold gas sweep device is corresponding with the downstream position of described central nozzle and peripheral injector nozzles respectively with the position of peripheral cold gas sweep device.
3. gas-turbine combustion chamber head construction according to claim 1, is characterized in that: described peripheral cold gas sweep device is communicated with cover cap outside air by least one air inlet pipe.
4. gas-turbine combustion chamber head construction according to claim 3, is characterized in that: described center cold gas sweep device is communicated with by tube connector with peripheral cold gas sweep device.
5. gas-turbine combustion chamber head construction according to claim 4, it is characterized in that: described peripheral cold gas sweep device comprises the collection chamber, the rectification room that are communicated with successively and goes out air cleft, described collection chamber is communicated with air inlet pipe, outside the tube wall of described rectification room around peripheral mixing tube, described in go out air cleft and be opened on end plate.
6. gas-turbine combustion chamber head construction according to claim 4, it is characterized in that: described center cold gas sweep device comprises the collection chamber, the rectification room that are communicated with successively and goes out air cleft, described collection chamber is communicated with tube connector, outside the tube wall of described rectification room around center mixing tube, described in go out air cleft and be opened on end plate.
7. the gas-turbine combustion chamber head construction according to claim 5 or 6, is characterized in that: described in go out air cleft width be 1 ~ 4mm.
8. gas-turbine combustion chamber head construction according to claim 7, is characterized in that: the circulation area of described collection chamber is 5 ~ 15 times that air cleft area.
9. gas-turbine combustion chamber head construction according to claim 8, is characterized in that: the circulation area of described rectification room is 1 ~ 2 times that air cleft area.
10. the gas-turbine combustion chamber head construction according to any one of claim 1-6, is characterized in that: the number of described peripheral injector nozzles is at least four.
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| CN201520231330.1U CN204717741U (en) | 2015-04-16 | 2015-04-16 | A kind of gas-turbine combustion chamber head construction |
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| CN201520231330.1U CN204717741U (en) | 2015-04-16 | 2015-04-16 | A kind of gas-turbine combustion chamber head construction |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519968A (en) * | 2018-11-27 | 2019-03-26 | 中国东方电气集团有限公司 | A kind of high pressure visable burner |
| CN111780159A (en) * | 2020-07-03 | 2020-10-16 | 中国科学院工程热物理研究所 | Clean cooling device of high-speed gas curtain of penetrating model combustion chamber adherence wall of optics |
| CN112856483A (en) * | 2021-01-12 | 2021-05-28 | 哈尔滨工业大学 | Humidification micro-mixing combustor |
| CN113048514A (en) * | 2021-04-20 | 2021-06-29 | 中国联合重型燃气轮机技术有限公司 | Burner hood |
| CN117189356A (en) * | 2023-10-20 | 2023-12-08 | 无锡明阳氢燃动力科技有限公司 | Hydrogen-overflow-preventing premixing pipe structure based on hydrogen gas turbine |
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2015
- 2015-04-16 CN CN201520231330.1U patent/CN204717741U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519968A (en) * | 2018-11-27 | 2019-03-26 | 中国东方电气集团有限公司 | A kind of high pressure visable burner |
| CN109519968B (en) * | 2018-11-27 | 2024-04-26 | 中国东方电气集团有限公司 | High-pressure visual combustor |
| CN111780159A (en) * | 2020-07-03 | 2020-10-16 | 中国科学院工程热物理研究所 | Clean cooling device of high-speed gas curtain of penetrating model combustion chamber adherence wall of optics |
| CN112856483A (en) * | 2021-01-12 | 2021-05-28 | 哈尔滨工业大学 | Humidification micro-mixing combustor |
| CN113048514A (en) * | 2021-04-20 | 2021-06-29 | 中国联合重型燃气轮机技术有限公司 | Burner hood |
| CN117189356A (en) * | 2023-10-20 | 2023-12-08 | 无锡明阳氢燃动力科技有限公司 | Hydrogen-overflow-preventing premixing pipe structure based on hydrogen gas turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Combustion chamber head construction Effective date of registration: 20161104 Granted publication date: 20151021 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191211 Granted publication date: 20151021 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200102 Address after: 102209 Beijing Changping District in the future of the national electric investment group Park in the future science city south of Beijing Patentee after: China United heavy-duty gas turbine technology Co., Ltd. Address before: 100084, Beijing, Haidian District science and Technology Park, Tsinghua Science and technology building, block C, 10 Patentee before: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. |
|
| TR01 | Transfer of patent right |