CN105180213A - Central region combustor with staged combustion function - Google Patents
Central region combustor with staged combustion function Download PDFInfo
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- CN105180213A CN105180213A CN201510591403.2A CN201510591403A CN105180213A CN 105180213 A CN105180213 A CN 105180213A CN 201510591403 A CN201510591403 A CN 201510591403A CN 105180213 A CN105180213 A CN 105180213A
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Abstract
The invention relates to the field of low-emission combustion chambers, in particular to a central region combustor with the staged combustion function. The problem that the requirement for the high outlet temperature can hardly be met by a combustion chamber can be solved. The central region combustor comprises a central body assembly and a nozzle assembly. The central body assembly is provided with a central barrel, an outer central body wall and a first-stage cyclone. A main fuel channel is formed between a nozzle shell and the central barrel. An auxiliary fuel channel is formed between the outer central body wall and the central barrel. The nozzle assembly is provided with the nozzle shell and a fuel spray rod. The nozzle shell is provided with a fuel path. The fuel spray rod is provided with main fuel injection holes and auxiliary fuel injection holes. Auxiliary fuel through holes corresponding to the auxiliary fuel injection holes one to one are formed in the central barrel. By the adoption of the central region combustor, the emission performance of a combustion chamber at the high flame temperature can be optimized; and due to the additional arrangement of the auxiliary fuel channel, the impact effect of cooling air on a downstream central backflow region is eliminated, and instable combustion and reduction of combustion efficiency of a central region are prevented.
Description
Technical field
The present invention relates to dry low emission combustor field, be specifically related to a kind of center burner of fractional combustion.
Background technology
As everyone knows, the inlet temperature of turbine will affect the efficiency of gas-turbine unit, therefore along with gas-turbine unit power, the improving constantly of efficiency requirements, turbine inlet temperature (TIT) requires also to raise gradually, causes turbine heat load to increase and the increase of combustion chamber NOx emission.
In recent years, country controls more to pay attention to air-polluting, and the NOx emission restriction of national legislation to gas turbine is also further strict.The NOx emission key controlling gas turbine is the flame temperature in control combustion district, and dry low emissions combustion technology adopts poor premixed combustion mode to reduce flame temperature, and this technology is ripe gradually and be widely used on combustion engine market.Engineering research shows, realizing one of crucial problem of poor premixed combustion is the premix uniformity, and the premix uniformity directly affects the Flame Temperature Distribution of whole combustion zone, thus affects NOx emission.
Chinese patent CN101639220A relates to centerbody cover for turbomachine combustor and method, and in that patent, this device comprises centerbody, outside turbulator component etc., outside turbulator and the spaced apart formation cooling air channels of centerbody.But cooling-air can have an impact to the smooth combustion of the Central backflow area in downstream, and this partial air is difficult to the complete blending with fuel, causes premix air capacity to reduce, and makes the more difficult requirement meeting high outlet temperature in combustion chamber.
Summary of the invention
The object of this invention is to provide a kind of center burner of fractional combustion, to solve the problem that current combustion room is difficult to meet high outlet temperature requirements.
Technical scheme of the present invention is:
A kind of center burner of fractional combustion, comprise centerbody assembly and nozzle assembly, described centerbody assembly has central cylinder, centerbody outer wall and one-level cyclone, described central cylinder has Swirl device, inner barrel antetheca and inner barrel rear wall, described inner barrel antetheca is attached to the downstream of described Swirl device, described inner barrel rear wall is attached to the upstream extremity of described Swirl device, and described one-level cyclone is attached in the downstream of inner barrel antetheca;
Described nozzle assembly has nozzle body and fuel spray boom, and described nozzle body has fuel passage;
Form main fuel passage between described nozzle body and described central cylinder, described centerbody outer wall and central cylinder interval are arranged, and form secondary fuel channel between the two;
Described fuel spray boom has main fuel spray-hole and secondary fuel orifice, described central cylinder offers and described secondary fuel orifice secondary fuel through-hole one to one.
Alternatively, described centerbody outer wall and described central cylinder are coaxially placed.
Alternatively, described fuel spray boom quantity is 2 ~ 8.
Alternatively, described fuel spray boom circumference is distributed on outside nozzle body.
Alternatively, described secondary fuel orifice axially becomes 70 ~ an angle of 90 degrees with described central cylinder.
Alternatively, described nozzle body is connected by welding with described fuel spray boom.
Alternatively, described nozzle body also has fuel passage on duty and fuel jet orifice on duty.
Beneficial effect of the present invention:
Center of the present invention burner can optimize the discharge performance of high flame temperature lower combustion chamber; Owing to increasing secondary fuel passage, therefore solve the percussion of cooling-air to downstream central recirculating zone, prevent center combustion instability and efficiency of combustion from reducing; Part of fuel is dispensed to secondary fuel passage simultaneously, effectively can improves the premix uniformity of center fuel and air, thus make the Flame Temperature Distribution of central combustion zone more even, reduce NOx emission.
Accompanying drawing explanation
Fig. 1 is the simplification view in the cross section of prior art center burner;
Fig. 2 is the simplification view in the cross section of center of the present invention burner;
Fig. 3 is the detailed view in the cross section at secondary fuel orifice place in Fig. 2.
Reference numeral:
Center burner 40;
Centerbody assembly 41;
Nozzle assembly 42;
Central cylinder 43;
Centerbody outer wall 44;
One-level cyclone 45;
Swirl device 46;
Inner barrel antetheca 47;
Inner barrel rear wall 48;
Secondary fuel through-hole 49;
Secondary fuel channel 50;
Cooling air channels 19;
Nozzle body 51;
Fuel spray boom 52;
Fuel passage 53;
Fuel orifice 24;
Main fuel spray-hole 54;
Secondary fuel orifice 55;
Main fuel passage 56;
Fuel passage 57 on duty;
Fuel jet orifice 58 on duty.
Detailed description of the invention
Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.
Shown in figure 1, show generally existing center burner 40, it comprises centerbody assembly 41 and nozzle assembly 42.Described centerbody assembly 41 comprises central cylinder 43, centerbody outer wall 44 and one-level cyclone 45.Central cylinder 43 comprises Swirl device 46, inner barrel antetheca 47 and inner barrel rear wall 48, and three, by being connected before and after welding, forms main fuel passage 56, for the abundant premix of fuel and air.One-level cyclone 45 is welded on the outside of inner barrel antetheca 47 downstream of central cylinder 43, for cooling the nearly flame end face of centerbody assembly 41, can prevent combustion chamber tempering simultaneously.Centerbody outer wall 44 is welded on the upstream extremity of one-level cyclone 45, and coaxially places with central cylinder 43, between form cooling air channels 19, incoming air enters cooling air channels 19 and cools centerbody outer wall 44.Nozzle assembly 42 comprises nozzle body 51 and fuel spray boom 52, nozzle body 51 comprises fuel passage 53, for supplying fuel, fuel spray boom 52 is connected on nozzle body 51 by welding, and circumference is uniformly distributed multiple, fuel spray boom 52 has fuel orifice 24, fuel is sprayed at a high speed from fuel orifice 24 by fuel passage 53, after the abundant premix of air flowed through in main fuel passage 56, participate in burning, combustion chamber pollutant emission can be reduced.
Shown in figure 2, the center burner of the embodiment of the present invention shows to be 40, and it comprises centerbody assembly 41 and nozzle assembly 42.
Centerbody assembly 41 comprises central cylinder 43, centerbody outer wall 44 and one-level cyclone 45; Central cylinder 43 comprises Swirl device 46, inner barrel antetheca 47 and inner barrel rear wall 48, and three, by being connected before and after welding, forms main fuel passage 56, for the abundant premix of fuel and air.
Central cylinder 43 also has secondary fuel through-hole 49, circulates for fuel; One-level cyclone 45 is welded on the outside of inner barrel antetheca 47 downstream of central cylinder 43; Centerbody outer wall 44 is welded on the upstream extremity of one-level cyclone 45, and and central cylinder 43 interval (between have space) is set, between form secondary fuel channel 50, secondary fuel enters secondary fuel channel 50 by secondary fuel through-hole 49, premix abundant with incoming air, one-level cyclone 45 can produce the recirculating zone of larger volume in downstream by eddy flow, ensure that the fuel after premix and air are in downstream smooth combustion.Further, centerbody outer wall 44 is chosen as coaxial setting with central cylinder 43, and this set-up mode is usual manner, repeats no more.
Nozzle assembly 42 comprises nozzle body 51 and fuel spray boom 52, nozzle body 51 comprises fuel passage 53, for supplying major and minor fuel, fuel spray boom 52 is connected on nozzle body 51, fuel spray boom 52 can be fixedly connected with nozzle body 51 by multiple applicable mode, and the quantity of fuel spray boom 52 and distributing position can carry out as required being applicable to revolve selection; In the present embodiment, preferred fuel spray boom 52 is fixedly connected with nozzle body 51 by welding, and the quantity of fuel spray boom 52 is 2 ~ 8, and fuel spray boom 52 circumference is distributed on outside nozzle body 51.
Further, nozzle body 51 also has fuel passage 57 on duty and fuel jet orifice on duty 58.
Shown in figure 3, fuel spray boom 52 has main fuel spray-hole 54 and secondary fuel orifice 55, fuel is sprayed at a high speed from main fuel spray-hole 54 and secondary fuel orifice 55 respectively by fuel passage 53.In addition, secondary fuel orifice 55 can be arranged with multiple applicable angle, and in the present embodiment, secondary fuel orifice 55 (axis) axially becomes 70 ~ an angle of 90 degrees with central cylinder 43.
Wherein, main fuel sprays from main fuel spray-hole 54, after the abundant premixed of the incoming air of main fuel passage 56, flows through in formation recirculating zone, downstream after Swirl device 46, and smooth combustion; Secondary fuel sprays from secondary fuel orifice 55, after the abundant premixed of incoming air of secondary fuel channel 50, flows through in formation recirculating zone, downstream after one-level cyclone 45, and smooth combustion.
Fuel is divided into major and minor fuel by center of the present invention burner, combustion chamber incoming air can be made full use of, incoming air in secondary fuel channel 50 can also participate in the premix of secondary fuel while cooling centerbody outer wall 44, the premix uniformity is greatly optimized under equal air capacity, thus make the Flame Temperature Distribution of central combustion zone more even, reduce NOx emission; Fuel simultaneously after premix and air, at fired downstream, reduce the impact that pure cooling-air brings combustion zone, Optimizing Combustion stability effectively.
Further, center of the present invention burner can optimize the discharge performance of high flame temperature lower combustion chamber, owing to increasing secondary fuel passage, therefore solve the percussion of cooling-air to downstream central recirculating zone, prevent center combustion instability and efficiency of combustion from reducing.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (7)
1. the center burner of a fractional combustion, comprise centerbody assembly (41) and nozzle assembly (42), it is characterized in that: described centerbody assembly (41) has central cylinder (43), centerbody outer wall (44) and one-level cyclone (45), described central cylinder (43) has Swirl device (46), inner barrel antetheca (47) and inner barrel rear wall (48), described inner barrel antetheca (47) is attached to the downstream of described Swirl device (46), described inner barrel rear wall (48) is attached to the upstream extremity of described Swirl device (46), described one-level cyclone (45) is attached in the downstream of inner barrel antetheca (47),
Described nozzle assembly (42) has nozzle body (51) and fuel spray boom (52), and described nozzle body (51) has fuel passage (53);
Main fuel passage (56) is formed between described nozzle body (51) and described central cylinder (43), described centerbody outer wall (44) and central cylinder (43) interval are arranged, and form secondary fuel channel (50) between the two;
Described fuel spray boom (52) has main fuel spray-hole (54) and secondary fuel orifice (55), described central cylinder (43) offers and described secondary fuel orifice (55) secondary fuel through-hole (49) one to one.
2. the center burner of fractional combustion according to claim 1, is characterized in that, described centerbody outer wall (44) and described central cylinder (43) are coaxially placed.
3. the center burner of fractional combustion according to claim 1, is characterized in that, described fuel spray boom (52) quantity is 2 ~ 8.
4. the center burner of the fractional combustion according to any one of claim 1-3, is characterized in that, described fuel spray boom (52) circumference is distributed on nozzle body (51) outside.
5. the center burner of fractional combustion according to claim 1, is characterized in that, described secondary fuel orifice (55) axially becomes 70 ~ an angle of 90 degrees with described central cylinder (43).
6. the center burner of fractional combustion according to claim 1, is characterized in that, described nozzle body (51) is connected by welding with described fuel spray boom (52).
7. the center burner of fractional combustion according to claim 1, is characterized in that, described nozzle body (51) also has fuel passage on duty (57) and fuel jet orifice on duty (58).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510591403.2A CN105180213A (en) | 2015-09-17 | 2015-09-17 | Central region combustor with staged combustion function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510591403.2A CN105180213A (en) | 2015-09-17 | 2015-09-17 | Central region combustor with staged combustion function |
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| CN105180213A true CN105180213A (en) | 2015-12-23 |
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| CN201510591403.2A Pending CN105180213A (en) | 2015-09-17 | 2015-09-17 | Central region combustor with staged combustion function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108626747A (en) * | 2017-03-24 | 2018-10-09 | 通用电气公司 | burner acoustic damping structure |
| CN109611891A (en) * | 2018-12-16 | 2019-04-12 | 中国航发沈阳发动机研究所 | A kind of dry low emission combustor |
| CN111237806A (en) * | 2018-11-29 | 2020-06-05 | 通用电气公司 | Premixing fuel nozzle |
| CN114526497A (en) * | 2022-01-07 | 2022-05-24 | 清华大学 | Double-necking combined spiral-flow type center-grading high-temperature-rise combustion chamber |
| CN114659138A (en) * | 2020-12-22 | 2022-06-24 | 斗山重工业建设有限公司 | Nozzle for combustion chamber, and gas turbine |
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| CN1058262A (en) * | 1990-07-10 | 1992-01-29 | 通用电气公司 | The movable combustion system of gas turbine and method of operating thereof |
| CN101639220A (en) * | 2008-07-28 | 2010-02-03 | 通用电气公司 | Centerbody cap for a turbomachine combustor and method |
| US20120011854A1 (en) * | 2010-07-13 | 2012-01-19 | Abdul Rafey Khan | Flame tolerant secondary fuel nozzle |
| CN203586283U (en) * | 2013-07-10 | 2014-05-07 | 辽宁省燃烧工程技术中心（有限公司） | Dry-type low-nitrogen combustion device of combustion gas turbine employing gas fuel |
| CN204176684U (en) * | 2014-09-26 | 2015-02-25 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Gas-turbine combustion chamber double ring type premixed fuel nozzle |
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2015
- 2015-09-17 CN CN201510591403.2A patent/CN105180213A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058262A (en) * | 1990-07-10 | 1992-01-29 | 通用电气公司 | The movable combustion system of gas turbine and method of operating thereof |
| CN101639220A (en) * | 2008-07-28 | 2010-02-03 | 通用电气公司 | Centerbody cap for a turbomachine combustor and method |
| US20120011854A1 (en) * | 2010-07-13 | 2012-01-19 | Abdul Rafey Khan | Flame tolerant secondary fuel nozzle |
| CN203586283U (en) * | 2013-07-10 | 2014-05-07 | 辽宁省燃烧工程技术中心（有限公司） | Dry-type low-nitrogen combustion device of combustion gas turbine employing gas fuel |
| CN204176684U (en) * | 2014-09-26 | 2015-02-25 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Gas-turbine combustion chamber double ring type premixed fuel nozzle |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108626747A (en) * | 2017-03-24 | 2018-10-09 | 通用电气公司 | burner acoustic damping structure |
| CN108626747B (en) * | 2017-03-24 | 2021-03-02 | 通用电气公司 | Combustor acoustic damping structure |
| CN111237806A (en) * | 2018-11-29 | 2020-06-05 | 通用电气公司 | Premixing fuel nozzle |
| CN109611891A (en) * | 2018-12-16 | 2019-04-12 | 中国航发沈阳发动机研究所 | A kind of dry low emission combustor |
| CN114659138A (en) * | 2020-12-22 | 2022-06-24 | 斗山重工业建设有限公司 | Nozzle for combustion chamber, and gas turbine |
| CN114659138B (en) * | 2020-12-22 | 2023-06-13 | 斗山重工业建设有限公司 | Nozzle for combustion chamber, and gas turbine |
| CN114526497A (en) * | 2022-01-07 | 2022-05-24 | 清华大学 | Double-necking combined spiral-flow type center-grading high-temperature-rise combustion chamber |
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Application publication date: 20151223 |
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