EP2423589A1 - Burner assembly - Google Patents

Burner assembly Download PDF

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Publication number
EP2423589A1
EP2423589A1 EP10174338A EP10174338A EP2423589A1 EP 2423589 A1 EP2423589 A1 EP 2423589A1 EP 10174338 A EP10174338 A EP 10174338A EP 10174338 A EP10174338 A EP 10174338A EP 2423589 A1 EP2423589 A1 EP 2423589A1
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EP
European Patent Office
Prior art keywords
burners
fuel
burner
arrangement according
burner arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP10174338A
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German (de)
French (fr)
Inventor
Matthias Hase
Jürgen MEISL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP10174338A priority Critical patent/EP2423589A1/en
Priority to PCT/EP2011/064072 priority patent/WO2012025427A1/en
Priority to US13/819,351 priority patent/US20130180251A1/en
Priority to EP11745767.1A priority patent/EP2609368A1/en
Priority to JP2013525249A priority patent/JP5606628B2/en
Publication of EP2423589A1 publication Critical patent/EP2423589A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/36—Supply of different fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/08—Disposition of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/12—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour characterised by the shape or arrangement of the outlets from the nozzle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/38—Nozzles; Cleaning devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
    • F23M20/005—Noise absorbing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/06042—Annular arrangement of burners in a furnace, e.g. in a gas turbine, operated in alternate lean-rich mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/07021—Details of lances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/11002—Liquid fuel burners with more than one nozzle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14021—Premixing burners with swirling or vortices creating means for fuel or air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/00014—Reducing thermo-acoustic vibrations by passive means, e.g. by Helmholtz resonators

Definitions

  • the present invention relates to a burner assembly according to the preamble of claim 1.
  • the combustion chamber is supplied with compressed air from the compressor.
  • the compressed air is mixed with a fuel, such as oil or gas, and the mixture burned in the combustion chamber.
  • the hot combustion exhaust gases are finally supplied as a working medium via a combustion chamber outlet of the turbine, where they transmit momentum to the blades under relaxation and cooling and thus do work.
  • a burner assembly has a carrier with at least two burners, which are mounted in the flow direction on the carrier.
  • Each burner comprises a cylindrical housing with a centrally disposed, a fuel channel having lance, which is supported via swirl vanes on the housing.
  • an attachment is arranged on the side leading to a combustion chamber, wherein at least one fuel nozzle in the attachment is preferably arranged downstream of the swirl blades and connected to the fuel channel.
  • gas turbines especially those that are operated with two different fuels, for example, an injection of the fuel oil in the range of swirl generators, in which the oil is mixed with air. For better mixing of oil and air, the oil within the nozzles used for the injection into a swirling motion is added. This oil nozzle is also referred to as a pressure-swirl nozzle.
  • the oil nozzles can not be arranged so that the mixing of the fuel with the air leads to an optimal result in terms of pressure pulsations.
  • the object of the present invention is therefore to provide a burner assembly which solves the above problem.
  • the at least two fuel nozzles of the at least two burners have a different functional characteristic and / or spray form.
  • a smearing By such a smearing, one understands effects such as e.g. Broadening of the flame zone, avoiding symmetrical structures and creating zones with different temperatures. This leads to an improved thermoacoustic behavior.
  • Fig. 1 shows a single burner 2 of such a burner assembly according to the invention.
  • swirl blades 4 are arranged around a lance.
  • the swirl blades 4 are arranged along the circumference of the lance in the housing 12.
  • a compressor air flow 7 in the leading to a combustion chamber (not shown) leading part of the burner 2 is passed.
  • the air is displaced by the swirl blades 4 in a swirling motion.
  • the lance also comprises a fuel channel 3.
  • the burner 2 further comprises an attachment 10 on the side leading to the combustion chamber.
  • the attachment 10 can be welded, screwed or directly cast with the lance, for example.
  • the mostly multiple fuel nozzles 1 are arranged in the attachment 10 preferably downstream of the swirl vanes 4 and are fluidically connected to the fuel passage 3, here represented as an oil passage.
  • the fuel passage 3 here represented as an oil passage.
  • eight such burners 2 are arranged circularly on a support (not shown).
  • the burners 2 are arranged around a pilot burner (not shown) with pilot cone.
  • the swirl blades 4 and additional fuel nozzles which are not shown here, however, have.
  • the at least two burners 2 have fuel nozzles 1 according to the invention, each with different functional characteristics and / or spray form. This means that the fuel nozzles 1 of the one burner 2 differ from the fuel nozzles 1 of the other burner 2 with regard to their functional characteristics and / or their spray form.
  • three or more burners 2 may have fuel nozzles 1 according to the invention with a respectively different functional characteristic and / or spray shape. The number of burners 2 and the number of fuel nozzles 1, each with different functional characteristics and / or spray shape is therefore not fixed.
  • the functional characteristic of a fuel nozzle 1 is characterized at least by the nozzle size, the jet angle, the liquid distribution and the Zerstäubungs characterizing.
  • the nozzle size essentially determines the fuel mass flow at a given pressure difference.
  • the atomization characteristic comprises at least the droplet size distribution.
  • simple pressure atomizers, swirl nozzles, or air-protected atomizers can be used. It is also possible to distinguish between the spray form, so that the fuel nozzles 1 can, for example, form a full jet, hollow cone jet, a full cone jet or a flat jet. Other spray forms are possible.
  • the fuel nozzles 1 of the respective burners 2 have a different distribution and penetration behavior of the fuel into the compressor air flow 7 due to the different functional characteristics and / or spray form. For example, a significantly wider penetration of the fuel into the airflow 7 may result in a narrower distribution of the fuel around the periphery of the attachment 10.
  • the different distribution and penetration behavior leads to a different stabilization of the flame zone of the respective burners 2. This results in a smearing of the combustion zones in the entire combustion system. The amount of energy available for feedback at a given frequency is thus reduced and falls below a critical limit. This leads to an improved thermoacoustic behavior.
  • Fig. 2 shows a fuel distribution of a first burner assembly according to the invention with eight burners 2a, 2b from the front.
  • the invention is not limited to eight burners 2a, 2b and a different number of burners is possible.
  • the burner 2a fuel nozzles 1 ( Fig.1 ) having a function characteristic and spray shape which cause a mean radial penetration depth and a wide fuel distribution around the attachment 10.
  • the burner 2a therefore has a wide fuel distribution ring 19a the essay 10 around.
  • the fuel distribution ring 19a has a large radial distance from the attachment 10.
  • the burners 2b have fuel nozzles 1 (FIG. Fig. 1 ) with a functional characteristic and spray shape, which cause a very small radial penetration depth and a narrow fuel distribution around the attachment 10 around.
  • the burner 2b therefore has a narrow fuel distribution ring 19b around the attachment 10 around.
  • the fuel distribution ring 19b also has a small radial distance from the attachment 10.
  • Fig. 2 shows a symmetrical arrangement of burners 2a, 2b.
  • the four burners 2a are arranged opposite each other with the same functional characteristics and spray form. This also applies to the burner 2b. However, other arrangements may be possible.
  • Fig. 3 shows a fuel distribution of a second burner assembly according to the invention with eight burners 2a, 2b from the front.
  • the burners 2a, 2b are arranged alternately.
  • Burner arrangements are shown which each have two burners 2a, 2b with a different functional characteristic and / or spray form in the fuel nozzles 1 (FIG. Fig. 1 ) exhibit. However, it is also possible to use a plurality of burners 2 with different functional characteristics and / or spray form in the fuel nozzles 1 (FIG. Fig. 1 ) may be present in such a burner arrangement.
  • Fig. 4 shows a fuel distribution of a third burner assembly according to the invention with eight burners 2a, 2b from the front.
  • Six burners 2a have fuel nozzles 1 (FIG. Fig. 1 ) with the same functional characteristics and spray shape
  • the two other burners 2b have fuel nozzles 1 ( Fig. 1 ) with a different functional characteristics and / or spray shape.
  • the function characteristic and spray shape of the fuel nozzles 1 of the burner 2b is equal to each other. This corresponds to an asymmetrical arrangement of burners 2a, 2b. Under thermoacoustic In view of such an asymmetrical arrangement is particularly advantageous to prevent circumferential modes in the entire burner system.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)

Abstract

The assembly has two burners (2a, 2b) mounted at a carrier in a flow direction, where the burners have cylindrical housings (12) with lances. Fuel channels are provided in the lances, and swirl impellers support the lances at the housings. A support (10) is arranged at a side that leads to a combustion chamber, and fuel nozzles are arranged in the support downstream of the swirl impellers, where the fuel nozzles are connected with the fuel channels. The fuel nozzles have different functional characteristics e.g. jet size, jet angle and fluid distribution, and/or spraying shapes.

Description

Die vorliegende Erfindung betrifft eine Brenneranordnung nach dem Oberbegriff des Anspruchs 1.The present invention relates to a burner assembly according to the preamble of claim 1.

Im Betrieb der Gasturbine wird der Brennkammer verdichtete Luft aus dem Verdichter zugeführt. Die verdichtete Luft wird mit einem Brennstoff, beispielsweise Öl oder Gas, vermischt und das Gemisch in der Brennkammer verbrannt. Die heißen Verbrennungsabgase werden schließlich als Arbeitsmedium über einen Brennkammerausgang der Turbine zugeführt, wo sie unter Entspannung und Abkühlung Impuls auf die Laufschaufeln übertragen und so Arbeit leisten.During operation of the gas turbine, the combustion chamber is supplied with compressed air from the compressor. The compressed air is mixed with a fuel, such as oil or gas, and the mixture burned in the combustion chamber. The hot combustion exhaust gases are finally supplied as a working medium via a combustion chamber outlet of the turbine, where they transmit momentum to the blades under relaxation and cooling and thus do work.

Eine Brenneranordnung weist einen Träger mit mindestens zwei Brennern auf, welche in Strömungsrichtung an dem Träger montiert sind. Jeder Brenner umfasst ein zylinderförmiges Gehäuse mit einer darin zentral angeordneten, einen Brennstoffkanal aufweisende Lanze, welche über Drallschaufeln am Gehäuse abgestützt ist. Dabei ist an der zu einer Brennkammer hinführenden Seite ein Aufsatz angeordnet, wobei mindestens eine Brennstoffdüse in dem Aufsatz vorzugsweise stromab der Drallschaufeln angeordnet und mit dem Brennstoffkanal verbunden ist. Bei Gasturbinen, insbesondere solchen, die mit zwei verschiedenen Brennstoffen betrieben werden, erfolgt beispielsweise eine Eindüsung des Brennstoffes Öl im Bereich von Drallerzeugern, in denen das Öl mit Luft vermischt wird. Zur besseren Vermischung von Öl und Luft wird das Öl innerhalb der zur Eindüsung verwendeten Düsen in eine Drallbewegung versetzt. Diese Öldüse wird auch als Druck-Drall-Düse bezeichnet.A burner assembly has a carrier with at least two burners, which are mounted in the flow direction on the carrier. Each burner comprises a cylindrical housing with a centrally disposed, a fuel channel having lance, which is supported via swirl vanes on the housing. In this case, an attachment is arranged on the side leading to a combustion chamber, wherein at least one fuel nozzle in the attachment is preferably arranged downstream of the swirl blades and connected to the fuel channel. In gas turbines, especially those that are operated with two different fuels, for example, an injection of the fuel oil in the range of swirl generators, in which the oil is mixed with air. For better mixing of oil and air, the oil within the nozzles used for the injection into a swirling motion is added. This oil nozzle is also referred to as a pressure-swirl nozzle.

Gerade bei Gasturbinen mit zwei verschiedenen Brennstoffen können die Öldüsen nicht so angeordnet werden, dass die Vermischung des Brennstoffs mit der Luft zu einem optimalen Ergebnis hinsichtlich der Druckpulsationen führt.Especially with gas turbines with two different fuels, the oil nozzles can not be arranged so that the mixing of the fuel with the air leads to an optimal result in terms of pressure pulsations.

Die Aufgabe der vorliegenden Erfindung ist daher die Angabe einer Brenneranordnung, welche das obige Problem löst.The object of the present invention is therefore to provide a burner assembly which solves the above problem.

Die Aufgabe wird gelöst durch eine Brenneranordnung nach Anspruch 1. Die weiteren Unteransprüche enthalten vorteilhafte Ausgestaltungen der Erfindung.The object is achieved by a burner assembly according to claim 1. The other subclaims contain advantageous embodiments of the invention.

Erfindungsgemäß weisen bei solch einer Brenneranordnung die mindestens zwei Brennstoffdüsen der mindestens zwei Brenner eine unterschiedliche Funktionscharakteristik und/oder Sprühform auf. Dadurch ergibt sich, in Bezug auf den jeweiligen Brenner, ein unterschiedliches Eindringverhalten des durch die Brennstoffdüsen eingedüsten Brennstoffs in z.B. die Verdichterluft. Dies hat zur Folge, dass die Flammenzone der jeweiligen Brenner einen unterschiedlichen Stabilisierungspunkt aufweist und somit auch unterschiedlich stabilisiert wird. Bezogen auf das gesamte Verbrennungssystem ergibt sich damit eine Verschmierung der Verbrennungszonen. Dabei versteht man unter einer solchen Verschmierung Effekte, wie z.B. Verbreiterung der Flammenzone, Vermeiden von symmetrischen Strukturen und Erzeugung von Zonen mit unterschiedlicher Temperatur. Dies führt zu einem verbesserten thermoakustischen Verhalten.According to the invention, in such a burner arrangement, the at least two fuel nozzles of the at least two burners have a different functional characteristic and / or spray form. This results, with respect to the respective burner, in a different penetration behavior of the fuel injected by the fuel nozzles into e.g. the compressor air. This has the consequence that the flame zone of the respective burner has a different stabilization point and thus is also stabilized differently. Based on the entire combustion system, this results in a smearing of the combustion zones. By such a smearing, one understands effects such as e.g. Broadening of the flame zone, avoiding symmetrical structures and creating zones with different temperatures. This leads to an improved thermoacoustic behavior.

Weitere Vorteile, Merkmale und Eigenschaften der vorliegenden Erfindung werden im Folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die beigefügten Figuren näher beschrieben. Die Merkmale der Ausführungsbeispiele können hierbei einzeln oder in Kombination miteinander vorteilhaft sein.

Fig. 1
zeigt schematisch einen Schnitt durch einen einzelnen Brenner einer erfindungsgemäßen Brenneranordnung.
Fig. 2
zeigt eine Brennstoffverteilung einer ersten erfindungsgemäßen Brenneranordnung mit acht Brennern.
Fig. 3
zeigt eine Brennstoffverteilung einer zweiten erfindungsgemäßen Brenneranordnung mit acht Brennern.
Fig. 4
zeigt eine Brennstoffverteilung einer dritten erfindungsgemäßen Brenneranordnung mit acht Brennern.
Further advantages, features and characteristics of the present invention will be described in more detail below on the basis of exemplary embodiments with reference to the attached figures. The features of the embodiments may be advantageous in this case individually or in combination with each other.
Fig. 1
schematically shows a section through a single burner of a burner assembly according to the invention.
Fig. 2
shows a fuel distribution of a first burner assembly according to the invention with eight burners.
Fig. 3
shows a fuel distribution of a second burner assembly according to the invention with eight burners.
Fig. 4
shows a fuel distribution of a third burner assembly according to the invention with eight burners.

Fig. 1 zeigt einen einzelnen Brenner 2 solch einer erfindungsgemäßen Brenneranordnung. In dem Gehäuse 12 des erfindungsgemäßen Brenners 2 sind um eine Lanze herum Drallschaufeln 4 angeordnet. Die Drallschaufeln 4 sind entlang des Umfanges der Lanze in dem Gehäuse 12 angeordnet. Durch die Drallschaufeln 4 wird ein Verdichterluftstrom 7 in den zu einer Brennkammer (nicht gezeigt) führenden Teil des Brenners 2 geleitet. Die Luft wird durch die Drallschaufeln 4 in eine Drallbewegung versetzt. Die Lanze umfasst zudem einen Brennstoffkanal 3. Der Brenner 2 umfasst weiterhin einen an der zu der Brennkammer hinführenden Seite einen Aufsatz 10. Der Aufsatz 10 kann z.B. mit der Lanze verschweißt, verschraubt oder direkt mitangegossen sein. Die zumeist mehreren Brennstoffdüsen 1 sind in dem Aufsatz 10 vorzugsweise stromab der Drallschaufeln 4 angeordnet und sind dabei strömungstechnisch mit dem Brennstoffkanal 3, hier als Ölkanal dargestellt, verbunden. Bevorzugt sind acht solcher Brenner 2 kreisrund an einem Träger angeordnet (nicht gezeigt). Dabei werden die Brenner 2 um einen (nicht gezeigten) Pilotbrenner mit Pilotkonus angeordnet. Zudem können die Drallschaufeln 4 auch zusätzliche Brennstoffdüsen, welche hier jedoch nicht dargestellt sind, aufweisen. Fig. 1 shows a single burner 2 of such a burner assembly according to the invention. In the housing 12 of the burner 2 according to the invention swirl blades 4 are arranged around a lance. The swirl blades 4 are arranged along the circumference of the lance in the housing 12. Through the swirl vanes 4, a compressor air flow 7 in the leading to a combustion chamber (not shown) leading part of the burner 2 is passed. The air is displaced by the swirl blades 4 in a swirling motion. The lance also comprises a fuel channel 3. The burner 2 further comprises an attachment 10 on the side leading to the combustion chamber. The attachment 10 can be welded, screwed or directly cast with the lance, for example. The mostly multiple fuel nozzles 1 are arranged in the attachment 10 preferably downstream of the swirl vanes 4 and are fluidically connected to the fuel passage 3, here represented as an oil passage. Preferably, eight such burners 2 are arranged circularly on a support (not shown). The burners 2 are arranged around a pilot burner (not shown) with pilot cone. In addition, the swirl blades 4 and additional fuel nozzles, which are not shown here, however, have.

Die zumindest zwei Brenner 2 weisen erfindungsgemäße Brennstoffdüsen 1 mit jeweils unterschiedlicher Funktionscharakteristik und/oder Sprühform auf. Dies bedeutet, dass die Brennstoffdüsen 1 des einen Brenners 2 sich hinsichtlich ihrer Funktionscharakteristik und/oder ihrer Sprühform von den Brennstoffdüsen 1 des anderen Brenners 2 unterscheiden. Alternativ können auch drei oder mehrere Brenner 2 erfindungsgemäße Brennstoffdüsen 1 mit einer jeweils unterschiedlichen Funktionscharakteristik und/oder Sprühform aufweisen. Die Anzahl der Brenner 2 sowie die Anzahl der Brennstoffdüsen 1 mit jeweils unterschiedlicher Funktionscharakteristik und/oder Sprühform ist daher nicht festgelegt.The at least two burners 2 have fuel nozzles 1 according to the invention, each with different functional characteristics and / or spray form. This means that the fuel nozzles 1 of the one burner 2 differ from the fuel nozzles 1 of the other burner 2 with regard to their functional characteristics and / or their spray form. Alternatively, three or more burners 2 may have fuel nozzles 1 according to the invention with a respectively different functional characteristic and / or spray shape. The number of burners 2 and the number of fuel nozzles 1, each with different functional characteristics and / or spray shape is therefore not fixed.

Die Funktionscharakteristik einer Brennstoffdüse 1 ist dabei zumindest durch die Düsengröße, den Strahlwinkel, die Flüssigkeitsverteilung und die Zerstäubungscharakteristik gekennzeichnet. Dabei legt die Düsengröße im Wesentlichen den Brennstoffmassenstrom bei gegebener Druckdifferenz fest. Die Zerstäubungscharakteristik umfasst dabei zumindest die Tröpfchengrößenverteilung. So können beispielsweise einfache Druckzerstäuber, Dralldüsen, oder luftgeschützte Zerstäuber verwendet werden. Auch bei der Sprühform kann unterschieden werden, so können die Brennstoffdüsen 1 beispielsweise einen Vollstrahl, Hohlkegelstrahl, einen Vollkegelstrahl oder einen Flachstrahl ausbilden. Auch andere Sprühformen sind möglich. Die Brennstoffdüsen 1 der jeweiligen Brenner 2 weisen durch die unterschiedliche Funktionscharakteristik und/oder Sprühform ein unterschiedliches Verteilungs- und Eindringverhalten des Brennstoffs in den Verdichterluftstrom 7 auf. So kann zum Beispiel eine deutlich weitere Eindringtiefe des Brennstoffs in die Luftströmung 7 eine engere Verteilung des Brennstoffs um den Umfang des Aufsatzes 10 zur Folge haben. Das unterschiedliche Verteilungs- und Eindringverhalten führt zu einer unterschiedlichen Stabilisierung der Flammenzone der jeweiligen Brenner 2. Dadurch ergibt sich eine Verschmierung der Verbrennungszonen im gesamten Verbrennungssystem. Die jeweils für eine Rückkopplung bei einer bestimmten Frequenz zur Verfügung stehende Energiemenge wird somit verringert und sinkt unter eine kritische Grenze. Dies führt zu einem verbesserten thermoakustischen Verhalten.The functional characteristic of a fuel nozzle 1 is characterized at least by the nozzle size, the jet angle, the liquid distribution and the Zerstäubungscharakteristik. The nozzle size essentially determines the fuel mass flow at a given pressure difference. The atomization characteristic comprises at least the droplet size distribution. Thus, for example, simple pressure atomizers, swirl nozzles, or air-protected atomizers can be used. It is also possible to distinguish between the spray form, so that the fuel nozzles 1 can, for example, form a full jet, hollow cone jet, a full cone jet or a flat jet. Other spray forms are possible. The fuel nozzles 1 of the respective burners 2 have a different distribution and penetration behavior of the fuel into the compressor air flow 7 due to the different functional characteristics and / or spray form. For example, a significantly wider penetration of the fuel into the airflow 7 may result in a narrower distribution of the fuel around the periphery of the attachment 10. The different distribution and penetration behavior leads to a different stabilization of the flame zone of the respective burners 2. This results in a smearing of the combustion zones in the entire combustion system. The amount of energy available for feedback at a given frequency is thus reduced and falls below a critical limit. This leads to an improved thermoacoustic behavior.

Fig. 2 zeigt eine Brennstoffverteilung einer ersten erfindungsgemäßen Brenneranordnung mit acht Brennern 2a, 2b von vorne. Die Erfindung ist jedoch nicht eingeschränkt auf acht Brenner 2a, 2b auch eine andere Anzahl von Brennern ist möglich. So weisen hier die Brenner 2a Brennstoffdüsen 1 (Fig.1) mit einer Funktionscharakteristik und Sprühform auf, welche eine mittlere radiale Eindringtiefe und eine breite Brennstoffverteilung um den Aufsatz 10 herum bewirken. Der Brenner 2a weist daher einen breiten Brennstoffverteilungsring 19a um den Aufsatz 10 herum auf. Der Brennstoffverteilungsring 19a weist von dem Aufsatz 10 einen großen radialen Abstand auf. Fig. 2 shows a fuel distribution of a first burner assembly according to the invention with eight burners 2a, 2b from the front. However, the invention is not limited to eight burners 2a, 2b and a different number of burners is possible. Thus, here the burner 2a fuel nozzles 1 ( Fig.1 ) having a function characteristic and spray shape which cause a mean radial penetration depth and a wide fuel distribution around the attachment 10. The burner 2a therefore has a wide fuel distribution ring 19a the essay 10 around. The fuel distribution ring 19a has a large radial distance from the attachment 10.

Die Brenner 2b hingegen weisen Brennstoffdüsen 1 (Fig. 1) mit einer Funktionscharakteristik und Sprühform auf, welche eine sehr geringe radiale Eindringtiefe und eine enge Brennstoffverteilung um den Aufsatz 10 herum bewirken. Der Brenner 2b weist daher einen schmalen Brennstoffverteilungsring 19b um den Aufsatz 10 herum auf. Der Brennstoffverteilungsring 19b weist zudem von dem Aufsatz 10 einen geringen radialen Abstand auf. Fig. 2 zeigt dabei eine symmetrische Anordnung von Brennern 2a, 2b. Dabei sind die jeweils vier Brenner 2a mit gleicher Funktionscharakteristik und Sprühform gegenüberliegend angeordnet. Ebenso gilt dies für die Brenner 2b. Es können jedoch auch andere Anordnungen möglich sein.On the other hand, the burners 2b have fuel nozzles 1 (FIG. Fig. 1 ) with a functional characteristic and spray shape, which cause a very small radial penetration depth and a narrow fuel distribution around the attachment 10 around. The burner 2b therefore has a narrow fuel distribution ring 19b around the attachment 10 around. The fuel distribution ring 19b also has a small radial distance from the attachment 10. Fig. 2 shows a symmetrical arrangement of burners 2a, 2b. The four burners 2a are arranged opposite each other with the same functional characteristics and spray form. This also applies to the burner 2b. However, other arrangements may be possible.

Fig. 3 zeigt eine Brennstoffverteilung einer zweiten erfindungsgemäßen Brenneranordnung mit acht Brennern 2a, 2b von vorne. Dabei sind die Brenner 2a, 2b alternierend angeordnet. Fig. 3 shows a fuel distribution of a second burner assembly according to the invention with eight burners 2a, 2b from the front. The burners 2a, 2b are arranged alternately.

Fig. 2 und Fig. 3 sind Brenneranordnungen gezeigt, die jeweils zwei Brenner 2a, 2b mit einer unterschiedlichen Funktionscharakteristik und/oder Sprühform bei den Brennstoffdüsen 1 (Fig. 1) aufweisen. Es können jedoch noch mehrere Brenner 2 mit unterschiedlicher Funktionscharakteristik und/oder Sprühform bei den Brennstoffdüsen 1 (Fig. 1) in einer solchen Brenneranordnung vorhanden sein. Fig. 2 and Fig. 3 Burner arrangements are shown which each have two burners 2a, 2b with a different functional characteristic and / or spray form in the fuel nozzles 1 (FIG. Fig. 1 ) exhibit. However, it is also possible to use a plurality of burners 2 with different functional characteristics and / or spray form in the fuel nozzles 1 (FIG. Fig. 1 ) may be present in such a burner arrangement.

Fig. 4 zeigt eine Brennstoffverteilung einer dritten erfindungsgemäßen Brenneranordnung mit acht Brennern 2a, 2b von vorne. Dabei weisen sechs Brenner 2a Brennstoffdüsen 1 (Fig. 1) mit gleicher Funktionscharakteristik und Sprühform auf, die zwei anderen Brenner 2b hingegen weisen Brennstoffdüsen 1 (Fig. 1) mit einer dazu unterschiedlichen Funktionscharakteristik und/oder Sprühform auf. Dabei ist die Funktionscharakteristik und Sprühform der Brennstoffdüsen 1 der Brenner 2b jedoch untereinander gleich. Dies entspricht einer unsymmetrischen Anordnung von Brennern 2a, 2b. Unter thermoakustischer Sicht ist eine solche unsymmetrische Anordnung insbesondere vorteilhaft, um Umfangsmoden im gesamten Brennersystem zu unterbinden. Fig. 4 shows a fuel distribution of a third burner assembly according to the invention with eight burners 2a, 2b from the front. Six burners 2a have fuel nozzles 1 (FIG. Fig. 1 ) with the same functional characteristics and spray shape, the two other burners 2b, however, have fuel nozzles 1 ( Fig. 1 ) with a different functional characteristics and / or spray shape. However, the function characteristic and spray shape of the fuel nozzles 1 of the burner 2b is equal to each other. This corresponds to an asymmetrical arrangement of burners 2a, 2b. Under thermoacoustic In view of such an asymmetrical arrangement is particularly advantageous to prevent circumferential modes in the entire burner system.

Claims (9)

Brenneranordnung mit - einem Träger , - mindestens zwei Brennern (2, 2a, 2b) welche in Strömungsrichtung an dem Träger montiert sind, wobei jeder Brenner (2, 2a, 2b) ein zylinderförmiges Gehäuse (12) mit einer darin zentral angeordneten, einen Brennstoffkanal (3) aufweisende Lanze umfasst, welche über Drallschaufeln (4) am Gehäuse (12) abgestützt ist und wobei an der zu einer Brennkammer hinführenden Seite ein Aufsatz (10) angeordnet ist, wobei mindestens eine Brennstoffdüse (1) in dem Aufsatz (10) vorzugsweise stromab der Drallschaufeln (4) angeordnet und mit dem Brennstoffkanal (3) verbunden ist,
dadurch gekennzeichnet, dass
die mindestens zwei Brennstoffdüsen (1) der mindestens zwei Brenner (2, 2a, 2b) eine unterschiedliche Funktionscharakteristik und/oder Sprühform aufweisen.Burner arrangement with a carrier, at least two burners (2, 2a, 2b) which are mounted in the flow direction on the carrier, wherein each burner (2, 2a, 2b) comprises a cylindrical housing (12) with a centrally disposed therein, a fuel channel (3) having lance, which is supported via swirl vanes (4) on the housing (12) and wherein at the Combustion chamber on the leading side an attachment (10) is arranged, wherein at least one fuel nozzle (1) in the attachment (10) is preferably arranged downstream of the swirl vanes (4) and connected to the fuel channel (3),
characterized in that
the at least two fuel nozzles (1) of the at least two burners (2, 2a, 2b) have a different functional characteristic and / or spray form. Brenneranordnung nach Anspruch 1,
dadurch gekennzeichnet, dass die Funktionscharakteristik zumindest durch die Düsengröße, den Strahlwinkel, die Flüssigkeitsverteilung, und die Zerstäubungscharakteristik gekennzeichnet ist.Burner arrangement according to claim 1,
characterized in that the functional characteristic is characterized at least by the nozzle size, the beam angle, the liquid distribution, and the Zerstäubungscharakteristik. Brenneranordnung nach Anspruch 2,
dadurch gekennzeichnet, dass die Zerstäubungscharakteristik zumindest durch die Tröpfchengrößenverteilung gekennzeichnet sind.Burner assembly according to claim 2,
characterized in that the Zerstäubungscharakteristik are characterized at least by the droplet size distribution. Brenneranordnung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Brennstoffdüsen (1) Öldüsen sind.Burner arrangement according to one of the preceding claims,
characterized in that the fuel nozzles (1) are oil nozzles. Brenneranordnung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass eine gerade Anzahl von Brennern (2a, 2b) vorgesehen ist, welche ringförmig auf dem Träger angebracht sind.Burner arrangement according to one of the preceding claims,
characterized in that an even number of burners (2a, 2b) are provided which are annularly mounted on the carrier. Brenneranordnung nach Anspruch 5,
dadurch gekennzeichnet, dass acht, zehn oder zwölft Brenner (2a, 2b) vorgesehen sind.Burner arrangement according to Claim 5,
characterized in that eight, ten or twelve burners (2a, 2b) are provided. Brenneranordnung nach Anspruch 5 oder 6,
dadurch gekennzeichnet, dass mindestens vier Brenner (2a, 2b) vorgesehen sind, wobei alle sich gegenüberliegende Brenner (2a, 2b) Brennstoffdüsen (1) mit gleicher Funktionscharakteristik und Sprühform aufweisen.Burner arrangement according to claim 5 or 6,
characterized in that at least four burners (2a, 2b) are provided, wherein all the opposing burners (2a, 2b) have fuel nozzles (1) with the same functional characteristics and spray form. Brenneranordnung nach Anspruch 5 oder 6,
dadurch gekennzeichnet, dass mindestens vier Brenner (2a, 2b) vorgesehen sind, wobei zumindest zwei sich gegenüberliegende Brenner (2a, 2b) Brennstoffdüsen (1) aufweisen, welche unterschiedliche Funktionscharakteristik und/oder Sprühform aufweisen.Burner arrangement according to claim 5 or 6,
characterized in that at least four burners (2a, 2b) are provided, wherein at least two opposing burners (2a, 2b) have fuel nozzles (1) which have different functional characteristics and / or spray form. Brenneranordnung nach Anspruch 4,
dadurch gekennzeichnet, dass eine ungerade Anzahl von Brennern (2a, 2b) vorgesehen sind.Burner arrangement according to Claim 4,
characterized in that an odd number of burners (2a, 2b) are provided.
EP10174338A 2010-08-27 2010-08-27 Burner assembly Withdrawn EP2423589A1 (en)

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EP10174338A EP2423589A1 (en) 2010-08-27 2010-08-27 Burner assembly
PCT/EP2011/064072 WO2012025427A1 (en) 2010-08-27 2011-08-16 Burner arrangement
US13/819,351 US20130180251A1 (en) 2010-08-27 2011-08-16 Burner arrangement
EP11745767.1A EP2609368A1 (en) 2010-08-27 2011-08-16 Burner arrangement
JP2013525249A JP5606628B2 (en) 2010-08-27 2011-08-16 Burner equipment

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WO2012025427A1 (en) 2012-03-01
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JP5606628B2 (en) 2014-10-15
US20130180251A1 (en) 2013-07-18

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