EP2409086A1 - Burner assembly - Google Patents

Burner assembly

Info

Publication number
EP2409086A1
EP2409086A1 EP10711179A EP10711179A EP2409086A1 EP 2409086 A1 EP2409086 A1 EP 2409086A1 EP 10711179 A EP10711179 A EP 10711179A EP 10711179 A EP10711179 A EP 10711179A EP 2409086 A1 EP2409086 A1 EP 2409086A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
supply channel
burner
fuel supply
wall
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.)
Granted
Application number
EP10711179A
Other languages
German (de)
French (fr)
Other versions
EP2409086B1 (en
Inventor
Karsten Jordan
Tobias Krieger
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 EP10711179.1A priority Critical patent/EP2409086B1/en
Publication of EP2409086A1 publication Critical patent/EP2409086A1/en
Application granted granted Critical
Publication of EP2409086B1 publication Critical patent/EP2409086B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2211/00—Thermal dilatation prevention or compensation
    • 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
    • F23D2900/00018—Means for protecting parts of the burner, e.g. ceramic lining outside of the flame tube

Definitions

  • the invention relates to a burner arrangement for firing fluid fuels and in particular to a burner arrangement for a gas turbine plant.
  • burner assemblies for firing fluid fuels are among other gas turbines in power plants and others
  • dual-fuel burners which are provided for the combustion of liquid and gaseous fuels, for example natural gas and fuel oil, optionally or in combination.
  • the burner assemblies are accordingly large in size and have a complex structure with multiple fuel supply channels.
  • a centrally located small sized pilot burner with its own fuel supply and air supply is used to stabilize the flame of a large main burner which is placed around the pilot burner.
  • the large main burner is operated predominantly in lean-mixed operation with excess oxygen in order to achieve more favorable emission values.
  • operation with a lean mixture causes the flame of the main burner at least in certain operating conditions subject to fluctuations, which are compensated by a continuous firing action of the pilot burner.
  • Such a burner arrangement is reproduced, for example, in EP 0 580 683 B1.
  • Gas and oil energy sources are arranged relatively close to each other, dar.
  • a gas annulus feeds the main burner based on the flow direction of the incoming air incoming on the upstream side of the so-called swirl vanes, which impart a mixing swirl to the air flow with the fuel gas, or through the swirl vanes.
  • an oil supply is present, which is usually located closer to the burner outlet, as the gas supply. It comprises an oil ring space and an oil feed channel leading to the annular space, which is arranged in the hub wall located between the gas ring space and the pilot burner.
  • the leading to the oil annulus oil supply channel is further away from the hot air supply channel so that the oil in the oil supply channel hardly undergoes heating and therefore only has a temperature of about 50 ° C.
  • the burner hub experiences strong heating in the area of the gas ring space and, on the other hand, the adjacent oil supply channel is significantly cooler, the wall between the gas ring space and the oil supply channel is subject to a large temperature gradient.
  • the temperature gradient arise thermal stresses that shorten the life of such burner hubs or make the use of a high-quality material with the associated costs required lent. Also in other areas where a cold
  • the present invention therefore has the object to reduce the described thermal stresses in the burner hub of the burner assembly.
  • this is equipped with at least one radial positioning means, which ensures a distance of the sleeve from the wall of the fuel supply channel, the distance can be selected in particular with regard to the maximum allowable heat transfer rate.
  • the at least one radial positioning means of the sleeve is designed as a circumferentially arranged, radially outwardly projecting positioning projection.
  • the gap forms a poorly heat-conducting region in comparison to the surrounding metal of the burner hub, which thermally insulates the metal of the hub from the flowing fuel and thus facilitates the heat exchange between the fuel and the burner.
  • Hub limited.
  • the sleeve can each have at least one circumferential positioning projection in the region of its two ends. As a result, the orientation of the casing device is more reliable and the possible due to the game intervals natural oscillations in the flow of fuel are excluded.
  • the at least one positioning projection of the sleeve can furthermore have an annular groove, which is particularly advantageous when the positioning projection is located in the region of a connection point between the fuel supply channel and a fuel supply pipe.
  • annular groove can then be avoided when welding or soldering the Brennstoffzuschreib- tube with the fuel supply channel, a solid or brazing the positioning projection on the fuel supply channel and / or on the fuel supply pipe.
  • the sleeve may be provided with at least one axial positioning means cooperating with an axial positioning means provided in the fuel supply passage for axially positioning the sleeve (30).
  • an axial positioning of the sleeve without cohesive connection is possible.
  • between the axial positioning of the sleeve and the axial positioning means in the fuel supply channel in particular an axial
  • the axial positioning of the sleeve may be formed as at least one abutting edge on an end face of the positioning projection.
  • the axial positioning means in the fuel supply channel is then designed as a counteranglement edge.
  • FIG. 1 shows a burner arrangement known from EP 0 580 683 B1
  • FIG. 2 shows a known embodiment of the burner hub of a burner arrangement
  • FIG. 3 shows a schematically exaggerated sequence of the thermally induced voltage in the burner hub according to the prior art from FIG. 2,
  • FIG. 5 shows an enlarged partial cross-sectional view from FIG. 4.
  • FIG. 1 shows a burner arrangement according to the prior art, which can optionally be used in conjunction with a plurality of similar arrangements, for example in the combustion chamber of a gas turbine plant.
  • the pilot burner system comprises a central oil feed 1 (medium G) with an oil nozzle 5 arranged at its end and an inner gas supply channel 2 (medium F) arranged concentrically around the central oil feed 1. This in turn is surrounded by a concentrically arranged around the axis of the burner inner air supply channel 3 (Medium E).
  • a suitable ignition system may be arranged, for which many embodiments are known and whose illustration has therefore been omitted here.
  • the inner air supply channel 3 has a swirl blading 6 in its end region.
  • the pilot burner system can, in a manner known per se, ie predominantly as a diffusion burner operated. Its task is to maintain the main burner in a stable burner, since it is mostly operated with a mixture of mats to reduce the emission of pollutants, which requires stabilization of its flame by means of a diffusion flame or a flame based on a less lean mixture.
  • the main burner system has a concentric with the pilot burner system arranged and obliquely on this incoming outer air supply annular duct system 4.
  • This air supply ring channel system 4 is also provided with a swirl blading 7.
  • the swirl blading 7 consists of hollow blades with outlet nozzles 11 in the flow cross-section of the air supply annular channel system 4 (medium A). These are fed from a gas supply line 19 and a gas ring channel 9 through openings 10.
  • the burner has an oil supply line 23, which opens into an oil ring channel 13, which in turn has outlet nozzles 14 in the region or downstream of the swirl blading 7.
  • the burner hub 18 has, as an integrally formed cast part, welded cast plugs 17, with which the auxiliary openings, which served to remove the mandrels, are closed.
  • FIG. 3 shows a schematically exaggerated sequence of the thermally induced stresses in the burner hub according to the prior art from FIG. Due to the stresses, the wall 21 between the gas ring space 9 and the oil supply line 23 is deformed.
  • This deformation of the metallic cast and / or welded burner hub 18 is due to the temperature gradient in the wall between the oil supply channel 23, flows through the oil at a temperature of about 50 0 C, and the gas annulus 9, due to the heating by the compressor air in the air supply channel 4 (medium A in Fig.l) is heated to about 420 0 C.
  • the shielding wall is realized in the form of a sleeve 30 inserted into the oil supply channel 23, which prevents direct contact of the cold oil flowing along the flow path in the oil supply channel 23 with the wall 21 between the gas ring chamber 9 and the oil supply line 23.
  • the oil itself can be used in the simplest case, provided that no ignition is to be feared, since in this case no sealing of the intermediate space 38 against the flow path of the oil is required.
  • FIG. 5 shows an enlarged partial cross-sectional view of the tubular section 37 of the oil supply channel 23 and the sleeve 30 introduced therein for clarification.
  • the positioning projection 33 is disposed in a common groove cutout of the tubular portion 37 and a corresponding groove groove of the oil supply pipe 32. Like the groove cutout of the tubular section 37, the groove cutout of the oil feed tube 32 also has a mating edge 50 which cooperates with an abutment edge 51 of the positioning projection 33. In this way, the sleeve 30 is centered by the positioning projection 33 not only in the oil supply passage 23, but also secured in the direction of the longitudinal axis Y.
  • All positioning projections 33, 35 preferably have a diameter dimensioned such that there is a sufficient distance between the walls of the cavity 30 and cylindrical outer surfaces of the positioning projections, which serves to compensate for different thermal expansions.
  • the sleeve 30 is positioned on the one hand exactly enough in the radial direction and on the other hand never jammed during operation. The stresses occurring as a result of jamming in the burner hub 18 are thus effectively avoided.
  • the thermal expansion of the sleeve 30 in the axial direction Y is designed free of tension causing jamming.
  • positioning projection 33 located in the Nutausfräsungen of the tubular section 37 and the oil supply pipe 32 positioning projection 33 is dimensioned such that a predetermined clearance d between the Jacobanoßkante 50 in the Nutausfräsung the oil supply pipe 32 and the corresponding abutment edge 51 of the positioning projection 33rd is present, which allows a thermal expansion of the sleeve in the axial direction without thereby voltages in the axial direction Y would be built.
  • the invention has been described in the context of the embodiment with reference to a specific oil supply channel, it can also be used in other fuel supply channels.
  • the sleeve need not have a round cross-section, but may also have a polygonal cross-section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Gas Burners (AREA)

Abstract

The invention relates to a burner assembly for a firing system for firing fluid fuels. The burner assembly has one burner hub (18), at least one air inlet channel (3, 4) and at least one fuel inlet channel (9, 13) for each fuel type, wherein the at least one fuel inlet channel (9, 13) is at least partially designed in the burner hub (18). A screening wall (30) is arranged in at least one fuel inlet channel (23) that is spaced apart from the wall (21) of the fuel inlet channel (23), so that an intermediate space (38) that is not part of the flow path of the fuel flowing through the fuel inlet channel (23) is formed between the wall (21) of the fuel inlet channel (23) and the screening wall (30). The sleeve (30) is equipped with at least one radial positioning means (33, 35) that ensures a clearance of the sleeve (30) from the wall (21) of the fuel inlet channel and that is at least one radial positioning means (33, 35) of the sleeve (35), designed as at least one positioning projection arranged in a circular manner, protruding out radially.

Description

Beschreibungdescription
Brenneranordnungburner arrangement
Die Erfindung betrifft eine Brenneranordnung zum Verfeuern fluidischer Brennstoffe und insbesondere eine Brenneranordnung für eine Gasturbinenanlage.The invention relates to a burner arrangement for firing fluid fuels and in particular to a burner arrangement for a gas turbine plant.
Mit Brenneranordnungen zum Verfeuern fluidischer Brennstoffe werden unter anderem Gasturbinen in Kraftwerken und anderenWith burner assemblies for firing fluid fuels are among other gas turbines in power plants and others
Großmaschinenanwendungen betrieben. Insbesondere werden hierbei sog. Dualbrennstoffbrenner eingesetzt, die zum Verfeuern von flüssigen und gasförmigen Brennstoffen, beispielsweise Erdgas und Heizöl, optional oder kombiniert vorgesehen sind.Large machine applications operated. In particular, so-called dual-fuel burners are used, which are provided for the combustion of liquid and gaseous fuels, for example natural gas and fuel oil, optionally or in combination.
Die Brenneranordnungen sind dementsprechend groß dimensioniert und weisen einen komplexen Aufbau mit mehreren Brennstoffzufuhrkanälen auf. So wird bspw. häufig ein mittig angeordneter kleiner dimensionierter Pilotbrenner mit eigener BrennstoffVersorgung und Luftzuführung dafür verwendet, die Flamme eines großen Hauptbrenners, der ringsherum um den Pilotbrenner angeordnet ist, zu stabilisieren. Der große Hauptbrenner wird nämlich vorwiegend im Magergemischbetrieb mit Sauerstoffüberschuss betrieben, um dadurch günstigere Emissi- onswerte zu erreichen. Der Betrieb mit einem Magergemisch führt jedoch dazu, dass die Flamme des Hauptbrenners zumindest in bestimmten Betriebszuständen Schwankungen unterliegt, die durch eine fortwährend zündende Wirkung des Pilotbrenners ausgeglichen werden. Eine derartige Brenneranordnung ist bei- spielsweise in EP 0 580 683 Bl wiedergegebenen.The burner assemblies are accordingly large in size and have a complex structure with multiple fuel supply channels. For example, often a centrally located small sized pilot burner with its own fuel supply and air supply is used to stabilize the flame of a large main burner which is placed around the pilot burner. Namely, the large main burner is operated predominantly in lean-mixed operation with excess oxygen in order to achieve more favorable emission values. However, operation with a lean mixture causes the flame of the main burner at least in certain operating conditions subject to fluctuations, which are compensated by a continuous firing action of the pilot burner. Such a burner arrangement is reproduced, for example, in EP 0 580 683 B1.
Eine Herausforderung bei diesen Brennern stellen die durch eine ungleichmäßige thermische Verteilung entstehenden mechanischen Spannungen in den Wandungen des metallischen Gehäu- ses, der sogenannten Nabe, in der die Zufuhrringkanäle derA challenge with these burners is the mechanical stresses in the walls of the metallic housing, the so-called hub, due to an uneven thermal distribution, in which the feed ring channels of the
Gas- und Öl-Energieträger relativ eng nebeneinander angeordnet sind, dar. Ein Gasringraum speist den Hauptbrenner bezogen auf die Strömungsrichtung der zuströmenden Luft eingangs- seitig stromauf der sogenannten Drallschaufeln, die dem Luftstrom mit dem Brenngas einen vermischenden Drall vermitteln, oder durch die Drallschaufeln hindurch. Weiterhin ist eine Ölzufuhr vorhanden, die in der Regel näher am Brennerausgang angeordnet ist, als die Gaszufuhr. Sie umfasst einen Ölring- raum sowie einen zum Ringraum führenden Ölzufuhrkanal, der in der zwischen dem Gasringraum und dem Pilotbrenner befindlichen Nabenwand angeordnet ist.Gas and oil energy sources are arranged relatively close to each other, dar. A gas annulus feeds the main burner based on the flow direction of the incoming air incoming on the upstream side of the so-called swirl vanes, which impart a mixing swirl to the air flow with the fuel gas, or through the swirl vanes. Furthermore, an oil supply is present, which is usually located closer to the burner outlet, as the gas supply. It comprises an oil ring space and an oil feed channel leading to the annular space, which is arranged in the hub wall located between the gas ring space and the pilot burner.
Da Gas gegenüber Öl eine geringere Dichte aufweist, beansprucht es einen größeren Querschnitt, wodurch die Dimensionierung der Gaszufuhr wesentlich größer ausfällt als der Ölzufuhr. Daher weist der Teil der Brenner-Nabe mit der Gaszufuhr eine größere zum Luftkanal gewandte Außenfläche auf als die Ölzufuhr. Die Luftzufuhr erfolgt mit vorverdichteterSince gas has a lower density compared to oil, it requires a larger cross-section, whereby the dimensioning of the gas supply is much greater than the oil supply. Therefore, the part of the burner hub with the gas supply to a larger air duct facing outer surface than the oil supply. The air supply takes place with pre-compressed
Luft, die einen Verdichter passiert hat, wodurch diese zugeführte Luft aufgrund der Komprimierung eine Temperatur aufweist, die bereits über 4000C erreicht. Folglich wird der Bereich der Brenner-Nabe mit der Gaszufuhr schnell auf eine Temperatur im Bereich von über 4000C aufgeheizt und bleibt bei dieser Betriebstemperatur. Der zum Ölringraum führende Ölzufuhrkanal ist dagegen weiter von dem heißen Luftzufuhrkanal entfernt sodass das Öl im Ölzufuhrkanal kaum eine Erwärmung erfährt und daher lediglich eine Temperatur von etwa 50°C aufweist.Air that has passed through a compressor, whereby this air supplied by the compression has a temperature that already reaches over 400 0 C. Consequently, the area of the burner hub with the gas supply is heated rapidly to a temperature in the range of over 400 0 C and remains at this operating temperature. The leading to the oil annulus oil supply channel, however, is further away from the hot air supply channel so that the oil in the oil supply channel hardly undergoes heating and therefore only has a temperature of about 50 ° C.
Da einerseits die Brenner-Nabe eine starke Aufheizung im Bereich der Gasringraums erfährt und andererseits der benachbarte Ölzufuhrkanal deutlich kühler ist, unterliegt die Wand zwischen der Gasringraum und dem Ölzufuhrkanal einem großen Temperaturgradienten. Infolge des Temperaturgradienten entstehen thermische Spannungen, welche die Lebensdauer derartiger Brenner-Naben verkürzen bzw. die Verwendung eines hochwertigen Materials mit den damit verbundenen Kosten erforder- lieh machen. Auch in anderen Bereichen, in denen ein kalterSince, on the one hand, the burner hub experiences strong heating in the area of the gas ring space and, on the other hand, the adjacent oil supply channel is significantly cooler, the wall between the gas ring space and the oil supply channel is subject to a large temperature gradient. As a result of the temperature gradient arise thermal stresses that shorten the life of such burner hubs or make the use of a high-quality material with the associated costs required lent. Also in other areas where a cold
Brennstoff durch einen heißen Naben-Bereich geführt ist, treten derartige Spannungen auf. Die vorliegende Erfindung macht es sich daher zur Aufgabe, die beschriebenen thermisch bedingten Spannungen in der Brenner-Nabe der Brenneranordnung herabzusetzen.Fuel is passed through a hot hub area, such voltages occur. The present invention therefore has the object to reduce the described thermal stresses in the burner hub of the burner assembly.
Diese Aufgabe wird durch eine Brenneranordnung nach Anspruch 1 gelöst. Die abhängigen Ansprüche enthalten vorteilhafte Ausgestaltungen der Erfindung.This object is achieved by a burner assembly according to claim 1. The dependent claims contain advantageous embodiments of the invention.
Eine erfindungsgemäße Brenneranordnung für eine Verfeuerungs- anläge zum Verfeuern fluidischer Brennstoffe umfasst eine Brenner-Nabe, wenigstens ein Luftzufuhrkanal und für jede Brennstoffart wenigstens einen Brennstoffzufuhrkanal, wobei der wenigstens eine Brennstoffzufuhrkanal zumindest teilweise in der Brenner-Nabe ausgebildet ist. In wenigstens einem Brennstoffzufuhrkanal ist eine Abschirmwand angeordnet, die von der Wandung des Brennstoffzufuhrkanals beabstandet ist, so dass zwischen der Wandung des Brennstoffzufuhrkanals und der Abschirmwand ein nicht zum Strömungspfad des durch den Brennstoffzufuhrkanal strömenden Brennstoffes gehörender Zwi- schenraum gebildet ist. Die Abschirmwand wird von einer in den Brennstoffzufuhrkanal eingebrachten Hülse gebildet. Um die richtige radiale Lage der Hülse im Brennstoffzufuhrkanal zu gewährleisten, ist diese mit wenigstens einem radialen Positioniermittel ausgestattet, welches einen Abstand der Hülse von der Wand des Brennstoffzufuhrkanals sicherstellt, wobei der Abstand insbesondere auch im Hinblick auf die maximal zu erlaubende Wärmetransferrate gewählt werden kann. Einschränkungen ergeben sich hierbei allerdings aus dem in der Nabe zur Verfügung stehenden Bauraum. Das wenigstens eine radiale Positioniermittel der Hülse ist als ein kreisumlaufend angeordneter, radial nach außen vorragender Positionier-Vorsprung ausgeführt .A burner arrangement according to the invention for a Feuerungsungsanläge for firing fluid fuels comprises a burner hub, at least one air supply channel and for each fuel at least one fuel supply channel, wherein the at least one fuel supply channel is at least partially formed in the burner hub. In at least one fuel supply channel, a shielding wall is arranged, which is spaced from the wall of the fuel supply channel, so that between the wall of the fuel supply channel and the Abschirmwand a not belonging to the flow path of the fuel flowing through the fuel supply channel space is formed. The shielding wall is formed by a sleeve introduced into the fuel supply duct. In order to ensure the correct radial position of the sleeve in the fuel supply channel, this is equipped with at least one radial positioning means, which ensures a distance of the sleeve from the wall of the fuel supply channel, the distance can be selected in particular with regard to the maximum allowable heat transfer rate. However, restrictions result from the space available in the hub. The at least one radial positioning means of the sleeve is designed as a circumferentially arranged, radially outwardly projecting positioning projection.
In der erfindungsgemäßen Brenneranordnung bildet der Zwi- schenraum einen im Vergleich zum umgebenden Metall der Brenner-Nabe schlecht Wärme leitenden Bereich, der das Metall der Nabe von dem strömenden Brennstoff thermisch isoliert und so den Wärmeaustausch zwischen dem Brennstoff und der Brenner- Nabe einschränket. Insbesondere kann die Hülse wenigstens jeweils einen kreisumlaufenden Positionier-Vorsprung im Bereich ihrer beiden Enden aufweisen. Hierdurch wird die Ausrichtung der Hüllenvorrichtung zuverlässiger und die aufgrund der Spielabstände möglichen Eigenschwingungen im Strom des Brennstoffes werden ausgeschlossen.In the burner assembly according to the invention, the gap forms a poorly heat-conducting region in comparison to the surrounding metal of the burner hub, which thermally insulates the metal of the hub from the flowing fuel and thus facilitates the heat exchange between the fuel and the burner. Hub limited. In particular, the sleeve can each have at least one circumferential positioning projection in the region of its two ends. As a result, the orientation of the casing device is more reliable and the possible due to the game intervals natural oscillations in the flow of fuel are excluded.
Der wenigstens eine Positionier-Vorsprung der Hülse kann weiterhin eine Ringnut aufweisen, die insbesondere dann von Vor- teil ist, wenn sich der Positionier-Vorsprung im Bereich einer Anschlussstelle zwischen dem Brennstoffzufuhrkanal und einem Brennstoffzufuhrrohr befindet. Mittels der Ringnut kann dann beim Verschweißen oder Verlöten des Brennstoffzufuhr- rohrs mit dem Brennstoffzufuhrkanal ein Festschweißen bzw. Festlöten des Positionier-Vorsprungs am Brennstoffzufuhrkanal und/oder am Brennstoffzufuhrrohr vermieden werden.The at least one positioning projection of the sleeve can furthermore have an annular groove, which is particularly advantageous when the positioning projection is located in the region of a connection point between the fuel supply channel and a fuel supply pipe. By means of the annular groove can then be avoided when welding or soldering the Brennstoffzufuhr- tube with the fuel supply channel, a solid or brazing the positioning projection on the fuel supply channel and / or on the fuel supply pipe.
Weiterhin kann die Hülse mit wenigstens einem axialen Positioniermittel ausgestattet sein, welches mit einem im Brenn- stoffzufuhrkanal vorhandenen axialen Positioniermittel zusammenwirket, um die Hülse (30) axial zu positionieren. Auf diese Weise ist ein axiales Positionieren der Hülse ohne stoffschlüssige Verbindung möglich. Dabei kann zwischen dem axialen Positioniermittel der Hülse und dem axialen Positionier- mittel im Brennstoffzufuhrkanal insbesondere ein axialesFurthermore, the sleeve may be provided with at least one axial positioning means cooperating with an axial positioning means provided in the fuel supply passage for axially positioning the sleeve (30). In this way, an axial positioning of the sleeve without cohesive connection is possible. In this case, between the axial positioning of the sleeve and the axial positioning means in the fuel supply channel in particular an axial
Spiel vorhanden sein, welches eine thermische Ausdehnung der Hülse in Axialrichtung ermöglicht, ohne dass dabei Spannungen generiert werden.Play be available, which allows a thermal expansion of the sleeve in the axial direction, without causing voltages are generated.
In einer konstruktiv einfachen Ausgestaltung kann das axiale Positioniermittel der Hülse als wenigstens eine Anstoßkante an einer stirnseitigen Fläche des Positionier-Vorsprungs ausgebildet sein. Das axiale Positioniermittel im Brennstoffzufuhrkanal ist dann als Gegenanstoßkante ausgeführt.In a structurally simple embodiment, the axial positioning of the sleeve may be formed as at least one abutting edge on an end face of the positioning projection. The axial positioning means in the fuel supply channel is then designed as a counteranglement edge.
Weitere Merkmale, Eigenschaften und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausfüh- rungsbeispieles unter Bezugnahme auf die beiliegenden Figuren. Es zeigen:Further features, characteristics and advantages of the invention will become apparent from the following description of an embodiment. Example with reference to the accompanying figures. Show it:
Figur 1 eine aus EP 0 580 683 Bl bekannte Brenneranordnung,FIG. 1 shows a burner arrangement known from EP 0 580 683 B1,
Figur 2 eine bekannte Ausgestaltung der Brenner-Nabe einer Brenneranordnung,FIG. 2 shows a known embodiment of the burner hub of a burner arrangement,
Figur 3 eine schematisch übertrieben dargestellte Folge der thermisch bedingten Spannung in der Brenner-Nabe nach Stand der Technik aus Figur 2,FIG. 3 shows a schematically exaggerated sequence of the thermally induced voltage in the burner hub according to the prior art from FIG. 2,
Figur 4 eine Querschnittsansicht einer bevorzugten Ausgestaltung der erfindungsgemäßen Brenneranordnung, undFigure 4 is a cross-sectional view of a preferred embodiment of the burner assembly according to the invention, and
Figur 5 eine vergrößerte Teilquerschnittsansicht aus Figur 4.FIG. 5 shows an enlarged partial cross-sectional view from FIG. 4.
Figur 1 zeigt eine Brenneranordnung nach dem Stand der Technik, die ggf. in Verbindung mit mehreren gleichartigen Anord- nungen, beispielsweise in der Brennkammer einer Gasturbinenanlage eingesetzt werden kann.FIG. 1 shows a burner arrangement according to the prior art, which can optionally be used in conjunction with a plurality of similar arrangements, for example in the combustion chamber of a gas turbine plant.
Sie besteht aus einem inneren Teil, dem Pilotbrennersystem und einem konzentrisch dazu liegenden äußeren Teil, dem Hauptbrennersystem. Beide Systeme sind für einen Betrieb mit gasförmigen und/oder flüssigen Brennstoffen in beliebiger Kombination geeignet. Das Pilotbrennersystem umfasst eine zentrale Ölzufuhr 1 (Medium G) mit einer an ihrem Ende angeordneten Öldüse 5 und einen konzentrisch um die zentrale Öl- zufuhr 1 herum angeordneten inneren Gaszufuhrkanal 2 (Medium F) . Dieser wiederum ist umgeben von einem konzentrisch um die Achse des Brenners angeordneten inneren Luftzufuhrkanal 3 (Medium E) . In oder an dem inneren Luftzufuhrkanal 3 kann ein geeignetes Zündsystem angeordnet sein, für welches viele Aus- führungsmöglichkeiten bekannt sind und auf dessen Darstellung hier deshalb verzichtet wurde. Der innere Luft-Zufuhrkanal 3 weist in seinem Endbereich eine Drallbeschaufelung 6 auf. Das Pilotbrennersystem kann in einer an sich bekannten Weise, d. h. überwiegend als ein Diffusionsbrenner, betrieben werden. Seine Aufgabe besteht darin, den Hauptbrenner in einem stabilen Brennbertieb aufrecht zu erhalten, da dieser zur Verminderung des Schadstoffausstoßes meistens mit einem Ma- gergemisch betrieben wird, was ein Stabilisieren seiner Flamme mittels einer Diffusionsflamme oder einer auf einem weniger mageren Gemisch beruhenden Flamme erfordert.It consists of an inner part, the pilot burner system and a concentric outer part, the main burner system. Both systems are suitable for operation with gaseous and / or liquid fuels in any combination. The pilot burner system comprises a central oil feed 1 (medium G) with an oil nozzle 5 arranged at its end and an inner gas supply channel 2 (medium F) arranged concentrically around the central oil feed 1. This in turn is surrounded by a concentrically arranged around the axis of the burner inner air supply channel 3 (Medium E). In or on the inner air supply channel 3, a suitable ignition system may be arranged, for which many embodiments are known and whose illustration has therefore been omitted here. The inner air supply channel 3 has a swirl blading 6 in its end region. The pilot burner system can, in a manner known per se, ie predominantly as a diffusion burner operated. Its task is to maintain the main burner in a stable burner, since it is mostly operated with a mixture of mats to reduce the emission of pollutants, which requires stabilization of its flame by means of a diffusion flame or a flame based on a less lean mixture.
Das Hauptbrennersystem weist ein konzentrisch zum Pilotbren- nersystem angeordnetes und schräg auf dieses zulaufendes äußeres Luft-Zufuhr-Ringkanalsystem 4 auf. Auch dieses Luft- Zufuhr-Ringkanalsystem 4 ist mit einer Drallbeschaufelung 7 versehen. Die Drallbeschaufelung 7 besteht aus Hohlschaufeln mit Auslassdüsen 11 im Strömungsquerschnitt des Luft-Zufuhr- Ringkanalsystems 4 (Medium A) . Diese werden aus einer Gaszufuhrleitung 19 und einem Gasringkanal 9 durch Öffnungen 10 gespeist. Zusätzlich weist der Brenner eine Ölzufuhrleitung 23 auf, welche in einen Ölringkanal 13 mündet, der seinerseits Auslassdüsen 14 im Bereich oder stromab der Drallbe- schaufelung 7 aufweist.The main burner system has a concentric with the pilot burner system arranged and obliquely on this incoming outer air supply annular duct system 4. This air supply ring channel system 4 is also provided with a swirl blading 7. The swirl blading 7 consists of hollow blades with outlet nozzles 11 in the flow cross-section of the air supply annular channel system 4 (medium A). These are fed from a gas supply line 19 and a gas ring channel 9 through openings 10. In addition, the burner has an oil supply line 23, which opens into an oil ring channel 13, which in turn has outlet nozzles 14 in the region or downstream of the swirl blading 7.
Figur 2 zeigt eine Ausgestaltung der Brenner-Nabe 18 einer Brenneranordnung nach Stand der Technik im Querschnitt.Figure 2 shows an embodiment of the burner hub 18 of a burner assembly according to the prior art in cross section.
Die Brenner-Nabe 18 weist als ein einstückig ausgebildetes Gussteil verschweißte Gussstopfen 17 auf, mit welchen die HilfsÖffnungen verschlossen sind, die zum Entfernen der Formkerne dienten.The burner hub 18 has, as an integrally formed cast part, welded cast plugs 17, with which the auxiliary openings, which served to remove the mandrels, are closed.
In der Brenner-Nabe 18 sind ein Gasringraum 9 und ein Ölring- raum 13 angeordnet. An der nach außen gewandten und sich verjüngenden Seitenfläche der Brenner-Nabe 18 weisen die Ringräume 9 und 13 jeweils eine Vielzahl an Austrittsöffnungen 10 und 14 auf, durch welche der jeweilige Brennstoff (Medium B bzw. Medium C in Figur 1) in den Brennraum 24 (s. Figur 1) ausgedüst wird. In Figur 3 ist eine schematisch übertrieben dargestellte Folge der thermisch bedingten Spannungen in der Brenner-Nabe nach Stand der Technik aus Figur 2 dargestellt. Aufgrund der Spannungen ist die Wand 21 zwischen dem Gasringraum 9 und der Ölzufuhrleitung 23 verformt. Diese Verformung der metallischen gegossenen und/oder verschweißten Brenner-Nabe 18 ergibt sich aufgrund des Temperaturgradienten in der Wand zwischen dem Ölzufuhrkanal 23, durch den Öl mit einer Temperatur von ca. 500C strömt, und dem Gasringraum 9, der aufgrund der Erwärmung durch die Verdichterluft im Luftzufuhrkanal 4 (Medium A in Fig.l) auf etwa 4200C erwärmt ist.In the burner hub 18, a gas ring space 9 and an oil ring space 13 are arranged. On the outwardly facing and tapered side surface of the burner hub 18, the annular spaces 9 and 13 each have a plurality of outlet openings 10 and 14, through which the respective fuel (medium B or medium C in Figure 1) in the combustion chamber 24th (see Figure 1) is emptied. FIG. 3 shows a schematically exaggerated sequence of the thermally induced stresses in the burner hub according to the prior art from FIG. Due to the stresses, the wall 21 between the gas ring space 9 and the oil supply line 23 is deformed. This deformation of the metallic cast and / or welded burner hub 18 is due to the temperature gradient in the wall between the oil supply channel 23, flows through the oil at a temperature of about 50 0 C, and the gas annulus 9, due to the heating by the compressor air in the air supply channel 4 (medium A in Fig.l) is heated to about 420 0 C.
Figur 4 zeigt ausschnittsweise einen Querschnitt durch eine Ausführungsform für die erfindungsgemäßen Brenneranordnung. Die Brenneranordnung umfasst eine Brenner-Nabe 18, in der ein Gasringraum 9 mit einem Gaszufuhrkanal 19 (in Figur 4 nicht dargestellt) sowie ein Ölringraum 13 mit einem Ölzufuhrkanal 23 angeordnet sind. Der grundsätzliche Aufbau der Brenneranordnung entspricht dem mit Bezug auf die Figuren 1 und 2 be- schriebenen Aufbau. Es werden daher nur die Unterschiede zu dem den Figuren 1 und 2 beschriebenen Brenneraufbau beschrieben .Figure 4 shows a detail of a cross section through an embodiment of the burner assembly according to the invention. The burner assembly comprises a burner hub 18, in which a gas annulus 9 with a gas supply channel 19 (not shown in Figure 4) and an oil annulus 13 are arranged with an oil supply channel 23. The basic structure of the burner arrangement corresponds to the structure described with reference to FIGS. 1 and 2. Therefore, only the differences from the burner structure described in FIGS. 1 and 2 will be described.
In der erfindungsgemäßen Brenneranordnung ist eine Abschirm- wand 30 im Ölzufuhrkanal 23 so angeordnet, dass zwischen der Wand zwischen dem Gasringraum 9 und der Ölzufuhrleitung 23 einerseits und der Abschirmwand 30 andererseits ein Zwischenraum 38 gebildet ist. Dieser Zwischenraum 38 isoliert den von der Innenfläche der Abschirmwand 30 gebildeten Strömungspfad des Öls thermisch von der Wand 21 zwischen dem Gasringraum 9 und der Ölzufuhrleitung 23, da das in dem Zwischenraum befindliche Medium, etwa Luft oder nicht oder kaum strömendes Öl, eine sehr viel geringere Wärmeleitfähigkeit aufweist, als das Metall der Brenner-Nabe 18. So beträgt bspw. die Wärme- leitfähigkeit von Luft 0,023 W/mK und die von Öl etwa 0,15In the burner arrangement according to the invention, a shielding wall 30 is arranged in the oil feed channel 23 such that a gap 38 is formed between the wall between the gas ring space 9 and the oil feed line 23 on the one hand and the shield wall 30 on the other hand. This space 38 thermally isolates the flow path of the oil formed by the inner surface of the shielding wall 30 from the wall 21 between the gas annulus 9 and the oil supply line 23, since the medium in the gap, such as air or hardly or hardly flowing oil, a much lower For example, the thermal conductivity of air is 0.023 W / mK and that of oil is about 0.15
W/mK (bei Raumtemperatur) . Die Wärmeleitfähigkeit von Metallen ist demgegenüber um zwei bis drei Größenordnungen höher. Der Zwischenraum 38 kann daher als eine adiabatisch wirkende thermische Abschirmung gesehen werden. Der Betrag des Abstandes s zwischen der Wand 21 und der Abschirmwand 30 kann konstruktiv zum Einstellen einer gewünschten Wärmetransferrate verwendet werden.W / mK (at room temperature). In contrast, the thermal conductivity of metals is two to three orders of magnitude higher. The gap 38 can therefore be considered an adiabatic acting thermal shielding can be seen. The amount of the distance s between the wall 21 and the shielding wall 30 may be used constructively to set a desired heat transfer rate.
Die Abschirmwand ist in Form einer in den Ölzufuhrkanal 23 eingesetzten Hülse 30 realisiert, die einen direkten Kontakt des entlang des Strömungspfades im Ölzufuhrkanal 23 strömenden kalten Öls mit der Wand 21 zwischen dem Gasringraum 9 und der Ölzufuhrleitung 23 verhindert. Der Außendurchmesser derThe shielding wall is realized in the form of a sleeve 30 inserted into the oil supply channel 23, which prevents direct contact of the cold oil flowing along the flow path in the oil supply channel 23 with the wall 21 between the gas ring chamber 9 and the oil supply line 23. The outer diameter of the
Hülse 30 ist um einen vorbestimmten Betrag geringer dimensioniert als der Innendurchmesser des Ölzufuhrkanals 23, so dass zwischen der eingesetzten Hülse 30 und der Wand 21 ein Zwischenraum 38 ausgebildet ist, in dem sich ein Medium mit ei- ner wesentlich niedrigeren Wärmeleitfähigkeit als das Metall der Brenner-Nabe 18 befindet. Das durch die von der Wand 21 beabstandet angeordnete Hülse 30 strömende Öl führt hierdurch kaum zu einer Abkühlung der Wand 21, wodurch das Temperaturgefälle zwischen der gasringraumseitgen Oberfläche und der ölkanalseitigen Oberfläche der Wand 21 geringer wird. Infolgedessen treten nur wesentlich geringere mechanische Spannungen als im Stand der Technik auf.Sleeve 30 is dimensioned smaller by a predetermined amount than the inner diameter of the oil supply channel 23, so that between the inserted sleeve 30 and the wall 21, a gap 38 is formed, in which a medium having a substantially lower thermal conductivity than the metal of the burner Hub 18 is located. As a result, the oil flowing through the sleeve 30 arranged at a distance from the wall 21 hardly leads to a cooling of the wall 21, as a result of which the temperature gradient between the gas ring space side surface and the oil channel side surface of the wall 21 decreases. As a result, only much lower mechanical stresses occur than in the prior art.
Als geeignetes Medium im Zwischenraum 38 ist im einfachsten Fall das Öl selbst verwendbar, sofern keine Zündung zu befürchten ist, da in diesem Fall keine Abdichtung des Zwischenraums 38 gegen den Strömungspfad des Öls erforderlich ist .As a suitable medium in the intermediate space 38, the oil itself can be used in the simplest case, provided that no ignition is to be feared, since in this case no sealing of the intermediate space 38 against the flow path of the oil is required.
Um die Hülse 30 einfach in den Ölzufuhrkanal 23 der Brenner- Nabe 18 montieren zu können, ist sie als ein in eine Öffnung in einem rohrartig ausgeführten Abschnitt 37 des Ölzufuhrkanals 23 einsteckbare Hülse 30 ausgebildet. Die Hülse 30 weist hierzu an ihrem stromaufwärtigen Ende einen vorzugsweise kreisumlaufenden, ringförmigen Positionier-Vorsprung 33 auf, der als ein Abstandshalter zum radialen Zentrieren des Hülsenkörpers im Hohlraum 23 dient und zugleich die Funktion einer Anstoßkante trägt 53, die gegen eine komplementäre, im Bereich der Öffnung des rohrartigen Vorsprungs 37 vorhandene Gegenanstoßkante 52 einer entsprechenden Nutausfräsung anstößt und somit die Position der Hülse 30 in axialer Richtung festlegt. Figur 5 zeigt zur Verdeutlichung eine vergrößerte Teilquerschnittsansicht des rohrartig ausgeführten Abschnitts 37 des Ölzufuhrkanals 23 sowie der darin eingeführten Hülse 30.To be able to easily mount the sleeve 30 in the oil supply channel 23 of the burner hub 18, it is designed as a sleeve 30 which can be inserted into an opening in a tubular section 37 of the oil supply channel 23. The sleeve 30 has for this purpose at its upstream end a preferably circular, annular positioning projection 33 which serves as a spacer for radially centering the sleeve body in the cavity 23 and at the same time carries the function of a abutting edge 53, against a complementary, im Area of the opening of the tubular projection 37 existing abutment edge 52 abuts a corresponding Nutausfräsung and thus determines the position of the sleeve 30 in the axial direction. FIG. 5 shows an enlarged partial cross-sectional view of the tubular section 37 of the oil supply channel 23 and the sleeve 30 introduced therein for clarification.
Die Hülse 30 weist an ihrem stromaufwärts positionierten Ende einen Positionier-Vorsprung 33 mit einer Ringnut 36 auf. sind. Die Ringnut 36 befindet sich bei in den Ölzufuhrkanal 23 eingesetzter Hülse 30 in Höhe der Ebene, in welcher sich die Öffnung des rohrartig ausgeführten Abschnitts 37 befindet. Dadurch befindet sich beim Verschweißen des rohrartig ausgeführten Abschnitts 37 mit einem Ölzuleitungsrohr 32 die Schweißnaht 31 im Bereich der Ringnut 36, so dass beim Verbinden der beiden Rohrenden 30 der Positionier-Vorsprung 33, und damit die Hülse 30, nicht festgeschweißt wird oder festbrennt .The sleeve 30 has at its upstream positioned end a positioning projection 33 with an annular groove 36. are. The annular groove 36 is located in the oil supply passage 23 inserted sleeve 30 in the amount of the plane in which the opening of the tubular section 37 is executed. As a result, the welding seam 31 is located in the region of the annular groove 36 during the welding of the tubular section 37 with an oil supply pipe 32, so that when the two pipe ends 30 are joined, the positioning projection 33, and thus the sleeve 30, is not welded or burnt.
Der Positionier-Vorsprung 33 ist in einer verbreiteten Nut- ausfräsung des rohrartig ausgeführten Abschnitts 37 und einer entsprechenden Nutausfräsung des Ölzuleitungsrohrs 32 angeordnet. Wie die Nutausfräsung des rohrartig ausgeführten Ab- Schnitts 37 weist auch die Nutausfräsung des Ölzuleitungsrohrs 32 eine Gegenanstoßkante 50 auf, die mit einer Anstoßkante 51 des Positionier-Vorsprungs 33 zusammenwirkt. Auf diese Weise wird die Hülse 30 durch den Positionier-Vorsprung 33 nicht nur in dem Ölzufuhrkanal 23 zentriert, sondern auch in Richtung der Längsachse Y gesichert.The positioning projection 33 is disposed in a common groove cutout of the tubular portion 37 and a corresponding groove groove of the oil supply pipe 32. Like the groove cutout of the tubular section 37, the groove cutout of the oil feed tube 32 also has a mating edge 50 which cooperates with an abutment edge 51 of the positioning projection 33. In this way, the sleeve 30 is centered by the positioning projection 33 not only in the oil supply passage 23, but also secured in the direction of the longitudinal axis Y.
Die beschriebene Art der Positionierung kann im Rahmen der Erfindung bereits ausreichend sein, jedoch weist die vorliegende Ausgestaltung einen weiteren Positionier-Vorsprung 35 (Fig.4) auf, der in der Nähe des stromabwärtigen Endes derThe described type of positioning may already be sufficient in the context of the invention, however, the present embodiment has a further positioning projection 35 (Figure 4), which in the vicinity of the downstream end of the
Hülse 30 angeordnet ist. Er kann beispielsweise effektiv gegen eventuell auftretende Eigenschwingungen der Hülse 30 wirken. Auch der am stromabwärtigen Ende der Hülse 30 angeordne- te Positionier-Vorsprung 35 ist vorzugsweise als ringförmiger kreisumlaufender Vorsprung ausgeführt und reicht mit seinem vorzugsweise zylindrisch ausgestalteten Außendurchmesser bis an die Wandung des Hohlraums 38, so dass er ebenfalls zur Zentrierung der Hülse 30 beiträgt.Sleeve 30 is arranged. For example, it can effectively counteract any inherent vibrations of the sleeve 30. Also arranged at the downstream end of the sleeve 30 te positioning projection 35 is preferably designed as an annular circular circumferential projection and extends with its preferably cylindrically configured outer diameter up to the wall of the cavity 38 so that it also contributes to the centering of the sleeve 30.
Alle Positionier-Vorsprünge 33, 35 weisen vorzugsweise einen derart dimensionierten Durchmesser auf, dass zwischen den Wandungen des Hohlraumes 30 und zylindrischen Außenflächen der Positionier-Vorsprünge ein ausreichender Abstand vorhanden ist, der dem Ausgleich verschiedener thermischer Ausdehnungen dient. Dadurch wird die Hülse 30 in radialer Richtung einerseits genau genug positioniert und andererseits niemals im Betrieb verklemmt. Die infolge einer Verklemmung auch in der Brenner-Nabe 18 auftretenden Spannungen werden somit effektiv vermieden.All positioning projections 33, 35 preferably have a diameter dimensioned such that there is a sufficient distance between the walls of the cavity 30 and cylindrical outer surfaces of the positioning projections, which serves to compensate for different thermal expansions. As a result, the sleeve 30 is positioned on the one hand exactly enough in the radial direction and on the other hand never jammed during operation. The stresses occurring as a result of jamming in the burner hub 18 are thus effectively avoided.
Außerdem wird erfindungsgemäß auch die thermische Ausdehnung der Hülse 30 in axialer Richtung Y frei von einer Spannungen verursachenden Verklemmung gestaltet. Hierzu ist der in den Nutausfräsungen des rohrartig ausgeführten Abschnitts 37 und des Ölzuleitungsrohrs 32 befindliche Positionier-Vorsprung 33 derart dimensioniert, dass ein vorgegebener Spielabstand d zwischen der Gegenanstoßkante 50 in der Nutausfräsung des Öl- zuleitungsrohrs 32 und der entsprechenden Anstoßkante 51 des Positionier-Vorsprungs 33 vorhanden ist, der eine thermische Ausdehnung der Hülse in Axialrichtung ermöglicht, ohne dass dadurch Spannungen in axialer Richtung Y aufgebaut würden.In addition, according to the invention, the thermal expansion of the sleeve 30 in the axial direction Y is designed free of tension causing jamming. For this purpose, located in the Nutausfräsungen of the tubular section 37 and the oil supply pipe 32 positioning projection 33 is dimensioned such that a predetermined clearance d between the Gegenanoßkante 50 in the Nutausfräsung the oil supply pipe 32 and the corresponding abutment edge 51 of the positioning projection 33rd is present, which allows a thermal expansion of the sleeve in the axial direction without thereby voltages in the axial direction Y would be built.
Die Hülse 30 kann in der erfindungsgemäßen Brenneranordnung montiert werden, indem sie durch die mit einem Brennstoffzu- fuhrrohr 32 zu verbindende Öffnung des rohrartig ausgeführten Abschnitts 37 des Brennstoffzufuhrkanals 23 bis zum Anschlag der Anstoßkante 53 des Positionier-Vorsprungs 33 gegen die Gegenanstoßkante 52 in der Nutfräsung des rohrartig ausgeführten Abschnitts 37 in den Brennstoffzufuhrkanal 23 eingeführt wird. Danach wird das Brennstoffzufuhrrohr 32 auf das stromaufwärtige Ende des rohrartig ausgeführten Abschnitts 37 aufgesetzt und mithilfe eines Schweißverfahrens mit dem rohrartig ausgeführten Abschnitt 37 verbunden, wobei die Ringnut 36 ein Festschweißen der Hülse am Brennstoffzufuhrrohr 32 und/oder am rohrartig ausgeführten Abschnitt 37 verhindert.The sleeve 30 can be mounted in the burner assembly according to the invention by passing through the opening of the tubular section 37 of the fuel supply channel 23 to be connected to a fuel supply pipe 32 until the abutment edge 53 of the positioning projection 33 abuts against the abutment edge 52 in the groove groove of the tubular portion 37 is inserted into the fuel supply passage 23. Thereafter, the fuel supply pipe 32 becomes the upstream end of the tubular portion 37 mounted and connected by means of a welding process with the tubular portion 37, wherein the annular groove 36 prevents a firm welding of the sleeve on the fuel supply pipe 32 and / or the tubular portion 37 executed.
Mit der beschriebenen Ausgestaltung der Hülse 30 sowie der Nutausfräsungen des rohrartig ausgeführten Abschnitts 37 und des Ölzuleitungsrohrs 32 können sowohl axiale als auch radiale Spannungen infolge einer Verklemmung der Hülse 30 verhin- dert werden.With the described configuration of the sleeve 30 and the groove cutouts of the tubular section 37 and the oil supply tube 32, both axial and radial stresses can be prevented as a result of jamming of the sleeve 30.
Obwohl die Erfindung im Rahmen des Ausführungsbeispiels mit Bezug auf einen speziellen Ölzufuhrkanal beschrieben worden ist, kann sie auch in anderen Brennstoffzufuhrkanälen zur An- wendung kommen. Auch braucht die Hülse keinen runden Querschnitt aufzuweisen, sondern kann auch einen eckigen Querschnitt besitzen. Although the invention has been described in the context of the embodiment with reference to a specific oil supply channel, it can also be used in other fuel supply channels. Also, the sleeve need not have a round cross-section, but may also have a polygonal cross-section.

Claims

Patentansprüche claims
1. Brenneranordnung für eine Verfeuerungsanlage zum Verfeuern fluidischer Brennstoffe, welche eine Brenner-Nabe (18), we- nigstens einen Luftzufuhrkanal (3, 4) und für jede Brennstoffart wenigstens einen Brennstoffzufuhrkanal (9, 13, 19, 23) aufweist, wobei der wenigstens eine Brennstoffzufuhrkanal (9, 13, 19, 23) zumindest teilweise in der Brenner-Nabe (18) ausgebildet ist, dadurch gekennzeichnet, dass in wenigstens einem Brennstoffzufuhrkanal (23) eine Abschirmwand (30) angeordnet ist, die von der Wandung (21) des Brennstoffzufuhrkanals (23) beabstandet ist, so dass zwischen der Wandung (21) des Brennstoffzufuhrkanals (23) und der Ab- schirmwand (30) ein nicht zum Strömungspfad des durch denA burner arrangement for a combustion plant for the combustion of fluid fuels, which has a burner hub (18), at least one air supply channel (3, 4) and for each type of fuel at least one fuel supply channel (9, 13, 19, 23), wherein the at least one fuel supply channel (9, 13, 19, 23) is at least partially formed in the burner hub (18), characterized in that in at least one fuel supply channel (23) a shielding wall (30) is arranged, which of the wall (21 ) of the fuel supply channel (23) is spaced, so that between the wall (21) of the fuel supply channel (23) and the Abschirmwand (30) a not to the flow path of the through
Brennstoffzufuhrkanal (23) strömenden Brennstoffes gehörender Zwischenraum (38) gebildet ist, die Abschirmwand von einer in den Brennstoffzufuhrkanal (23) eingebrachten Hülse (30) gebildet ist, die Hülse (30) mit wenigstens einem radialen Po- sitioniermittel (33, 35) ausgestattet ist, welches einen Abstand (s) der Hülse (30) von der Wand (21) des Brennstoffzufuhrkanals (23) gewährleistet und das wenigstens eine radiale Positioniermittel (33, 35) der Hülse (30) als wenigstens ein kreisumlaufend angeordneter, radial nach außen vorragender Positionier-Vorsprung (33, 35) ausgeführt ist.Fuel supply channel (23) flowing fuel belonging gap (38) is formed, the shielding wall of a introduced into the fuel supply channel (23) sleeve (30) is provided, the sleeve (30) with at least one radial positioning means (33, 35) is, which ensures a distance (s) of the sleeve (30) from the wall (21) of the fuel supply channel (23) and the at least one radial positioning means (33, 35) of the sleeve (30) as at least one circular arranged radially outwards projecting positioning projection (33, 35) is executed.
2. Brenneranordnung nach Anspruch 1, dadurch gekennzeichnet, dass der wenigstens eine Positionier-Vorsprung (33) der Hülse (30) eine Ringnut (36) aufweist.2. Burner arrangement according to claim 1, characterized in that the at least one positioning projection (33) of the sleeve (30) has an annular groove (36).
3. Brenneranordnung nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass die Hülse (30) wenigstens jeweils einen kreisumlaufenden Po- sitionier-Vorsprung (33, 35) im Bereich ihrer beiden Enden aufweist .3. Burner arrangement according to claim 1 or claim 2, characterized in that the sleeve (30) has at least in each case a circulating positioning stance (33, 35) in the region of its two ends.
4. Brenneranordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Hülse (30) mit wenigstens einem axialen Positioniermitteln (51, 53) ausgestattet ist, welche mit im Brennstoffzu- fuhrkanal (23) vorhandenen axialen Positioniermitteln (50, 52) zusammenwirken, um die Hülse (30) axial zu positionieren.4. Burner arrangement according to one of claims 1 to 3, characterized in that the sleeve (30) is provided with at least one axial positioning means (51, 53) cooperating with axial positioning means (50, 52) provided in the fuel supply passage (23) for axially positioning the sleeve (30) ,
5. Brenneranordnung nach Anspruch 4, dadurch gekennzeichnet, dass zwischen dem axialen Positioniermittel (51, 53) der Hülse (30) und dem axialen Positioniermittel (50, 52) im Brennstoffzufuhrkanal (23) ein axiales (d) Spiel vorhanden ist.5. Burner arrangement according to claim 4, characterized in that between the axial positioning means (51, 53) of the sleeve (30) and the axial positioning means (50, 52) in the fuel supply channel (23) an axial (d) clearance is present.
6. Brenneranordnung nach Anspruch 4 oder Anspruch 5, dadurch gekennzeichnet, dass das axiale Positioniermittel (50, 51, 52, 53) der Hülse (30) als wenigstens eine Anstoßkante (51, 53) an einer stirnseitige Fläche des Positionier-Vorsprungs (33) ausgebildet ist und das axiale Positioniermittel (50, 52) im Brennstoffzufuhrkanal (23) als Gegenanstoßkante (50, 52) ausgeführt ist. 6. Burner arrangement according to claim 4 or claim 5, characterized in that the axial positioning means (50, 51, 52, 53) of the sleeve (30) as at least one abutment edge (51, 53) on an end face of the positioning projection (33 ) is formed and the axial positioning means (50, 52) in the fuel supply channel (23) as a counter-abutting edge (50, 52) is executed.
EP10711179.1A 2009-03-18 2010-03-11 Burner assembly for a gas turbine Active EP2409086B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10711179.1A EP2409086B1 (en) 2009-03-18 2010-03-11 Burner assembly for a gas turbine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09155441A EP2236934A1 (en) 2009-03-18 2009-03-18 Burner assembly
EP10711179.1A EP2409086B1 (en) 2009-03-18 2010-03-11 Burner assembly for a gas turbine
PCT/EP2010/053060 WO2010121864A1 (en) 2009-03-18 2010-03-11 Burner assembly

Publications (2)

Publication Number Publication Date
EP2409086A1 true EP2409086A1 (en) 2012-01-25
EP2409086B1 EP2409086B1 (en) 2013-11-13

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP09155441A Withdrawn EP2236934A1 (en) 2009-03-18 2009-03-18 Burner assembly
EP10711179.1A Active EP2409086B1 (en) 2009-03-18 2010-03-11 Burner assembly for a gas turbine

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09155441A Withdrawn EP2236934A1 (en) 2009-03-18 2009-03-18 Burner assembly

Country Status (6)

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US (1) US9057524B2 (en)
EP (2) EP2236934A1 (en)
CN (1) CN102388270B (en)
ES (1) ES2437090T3 (en)
RU (1) RU2491478C2 (en)
WO (1) WO2010121864A1 (en)

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Publication number Priority date Publication date Assignee Title
JP6210810B2 (en) * 2013-09-20 2017-10-11 三菱日立パワーシステムズ株式会社 Dual fuel fired gas turbine combustor
US20160116168A1 (en) * 2014-10-27 2016-04-28 Solar Turbines Incorporated Robust insulated fuel injector for a gas turbine engine
CN108310926B (en) * 2018-04-25 2024-01-19 大连恒通和科技有限公司 Combustion tail gas treatment and heat recovery device
US10982856B2 (en) * 2019-02-01 2021-04-20 Pratt & Whitney Canada Corp. Fuel nozzle with sleeves for thermal protection
DE112022002502T5 (en) * 2021-08-05 2024-03-07 Mitsubishi Heavy Industries, Ltd. GAS TURBINE COMBUSTION CHAMBER AND GAS TURBINE

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EP0276696B1 (en) * 1987-01-26 1990-09-12 Siemens Aktiengesellschaft Hybrid burner for premix operation with gas and/or oil, particularly for gas turbine plants
RU2079049C1 (en) 1991-04-25 1997-05-10 Сименс А.Г. Burner
US5423173A (en) * 1993-07-29 1995-06-13 United Technologies Corporation Fuel injector and method of operating the fuel injector
JP3939756B2 (en) * 1995-09-22 2007-07-04 シーメンス アクチエンゲゼルシヤフト Especially for gas turbine burners
US5761907A (en) * 1995-12-11 1998-06-09 Parker-Hannifin Corporation Thermal gradient dispersing heatshield assembly
DE19905995A1 (en) 1999-02-15 2000-08-17 Asea Brown Boveri Injection lance or nozzle for liquid and gaseous fuel in combustion chamber is part of secondary or tertiary burner around which flows hot gas jet in main flow direction
DE19905996A1 (en) 1999-02-15 2000-08-17 Abb Alstom Power Ch Ag Fuel lance for injecting liquid and / or gaseous fuels into a combustion chamber
US6182437B1 (en) * 1999-06-24 2001-02-06 Pratt & Whitney Canada Corp. Fuel injector heat shield
US6761035B1 (en) * 1999-10-15 2004-07-13 General Electric Company Thermally free fuel nozzle
US6543235B1 (en) * 2001-08-08 2003-04-08 Cfd Research Corporation Single-circuit fuel injector for gas turbine combustors
US6823677B2 (en) * 2002-09-03 2004-11-30 Pratt & Whitney Canada Corp. Stress relief feature for aerated gas turbine fuel injector
ES2378375T3 (en) 2005-02-07 2012-04-11 Siemens Aktiengesellschaft Thermal display
US8166763B2 (en) * 2006-09-14 2012-05-01 Solar Turbines Inc. Gas turbine fuel injector with a removable pilot assembly
US8015815B2 (en) * 2007-04-18 2011-09-13 Parker-Hannifin Corporation Fuel injector nozzles, with labyrinth grooves, for gas turbine engines

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Title
See references of WO2010121864A1 *

Also Published As

Publication number Publication date
US9057524B2 (en) 2015-06-16
RU2011142000A (en) 2013-04-27
CN102388270A (en) 2012-03-21
US20110314826A1 (en) 2011-12-29
WO2010121864A1 (en) 2010-10-28
ES2437090T3 (en) 2014-01-08
EP2236934A1 (en) 2010-10-06
CN102388270B (en) 2014-07-09
RU2491478C2 (en) 2013-08-27
EP2409086B1 (en) 2013-11-13

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