EP2054669B1 - Burner with a protective element for ignition electrodes - Google Patents
Burner with a protective element for ignition electrodes Download PDFInfo
- Publication number
- EP2054669B1 EP2054669B1 EP07788421A EP07788421A EP2054669B1 EP 2054669 B1 EP2054669 B1 EP 2054669B1 EP 07788421 A EP07788421 A EP 07788421A EP 07788421 A EP07788421 A EP 07788421A EP 2054669 B1 EP2054669 B1 EP 2054669B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- ignition
- gas turbine
- ignition electrodes
- protective element
- 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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Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 22
- 239000000446 fuel Substances 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 241001156002 Anthonomus pomorum Species 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 240000006829 Ficus sundaica Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q9/00—Pilot flame igniters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
- F23Q3/006—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/22—Details
- F23Q7/24—Safety arrangements
Definitions
- the invention relates to a burner with an igniter and at least one ignition electrode, in particular one for installation in a burner of a gas turbine.
- a designed as a pilot burner torch with a detonator and igniter leading ignition electrodes is, for example, in EP 1 591 723 A or in EP 0 193 838 B1 described.
- the detonator has the task of igniting the fuel.
- the ignition electrodes are attached to the outside of the pilot burner and run parallel to its longitudinal axis.
- the fuel supply is located inside the pilot burner and ends in fuel outlet openings. The ignition electrodes end in the region of the fuel outlet openings and ignite the fuel emerging there by means of a spark.
- the spark is generated by an ignition voltage between two ignition electrodes and is active during the entire ignition duration.
- Damage to or bending of one or both of the ignition electrodes mounted on the pilot burner during transport or installation may adversely affect the performance of the ignition electrodes. Damage or bending may therefore necessitate replacement of the ignition electrodes.
- the replacement of the ignition electrodes may also be necessary if one of the electrodes is so bent that, instead of between the electrode tips between an electrode line and another metallic component to the electric flashover and therefore the gas mixture can not be ignited.
- the invention has for its object to provide a gas turbine burner with at least one ignition electrode available, in which the above problem does not occur or only to a reduced extent.
- Another object of the present invention is to provide a gas turbine with an advantageous gas turbine combustor.
- gas turbine burner with the features of claim 1 and a gas turbine according to claim 15.
- the gas turbine burner can be designed in particular as a pilot burner.
- the solution to the problem is that the burner is equipped with two ignition electrodes extending on its outer side, these electrodes being assigned a protective element which projects beyond the outside of the burner and beyond the ignition electrode.
- the gas turbine according to the invention is equipped with such a gas turbine burner.
- the distance between the protective element and the ignition electrodes is at least so great that when an ignition voltage is applied to the ignition electrodes, no flashover occurs between the protective element and the ignition electrodes, so that a current flashover between the ignition electrodes and the protective element can be reliably avoided.
- the gas turbine burner comprises two ignition electrodes, each with an electrode tip.
- the ignition takes place by a flashover at the electrode tips when an ignition voltage is applied between the two ignition electrodes.
- the ignition is therefore not effected thermally.
- True, in US 5,860,804 and US 5,865,651 also mentions other than thermal igniters, but in these documents no igniter is described in which a flashover occurs between two electrodes. The other documents already mentioned describe only thermal detonators.
- the advantage of the solution according to the invention is therefore that the ignition electrodes are protected and therefore damage during transport or when installing and removing the ignition electrodes can be avoided.
- EP 0 193 838 B1 Although a combustion chamber of a gas turbine with a burner is described, however, the ignition electrodes of the burner are not equipped with a protective element.
- the protective element is connected to the outside of the burner, so that the necessary stability is ensured.
- the protective element surrounds the ignition electrodes, wherein the ignition electrode is at least partially covered lengthwise, so that the at least one ignition electrode is optimally protected.
- the protective member may be U-shaped and fixed with the open side and the outside of the burner, so that the ignition electrode are protected from three sides to the outside.
- the protective element can completely enclose the electrodes at least in the front region near the electrode tips.
- the protective element may be formed by at least one rib, so that a better accessibility of the ignition electrodes is ensured.
- the rib can run parallel to the ignition electrode. There may also be at least one rib on each side of the ignition electrode.
- the protective element is made of a rigid and impact-resistant material, so that a deformation of the protective element, which could lead to a deformation of the internal ignition electrodes, is avoided.
- the protective element according to the invention may preferably be assigned to a region of the ignition electrode which leads to the electrode tip. This means that in this case the protective element does not reach as far as the electrode tip and does not protrude beyond the electrode tip. Rather, the area of the electrode is to be protected, which runs along the outside of the gas turbine burner, in other words, the supply line to the actual ignition at the electrode tip.
- the gas turbine burner according to the invention can in principle be rotationally symmetrical and the at least one ignition electrode extending on its outer side extend parallel to the axis of symmetry of the gas turbine burner.
- the gas turbine according to the invention can be equipped with a gas turbine burner according to the invention in one of the described embodiments.
- Burner assembly shown belongs to a gas turbine plant, the preferred field of application of the invention.
- the burner arrangement is, however, also suitable for gas-fired furnaces of boilers.
- the burner assembly consists of at least one on a support plate (in FIG. 1 not shown; s. FIG. 2 . 3 ) mounted first burner 2, which serves as a pilot burner, and a second burner 1, which serves as a main burner and in the middle of the first burner 2 is inserted coaxially.
- the first burner 2 has a burner head 4 with a swirl blading 3 and can be operated with natural gas E and / or fuel oil H as fuel.
- the head 4 of the first burner 2 is coaxial with respect to the burner axis, surrounded by an air supply channel 6, which serves to supply the main portion of the combustion air L to a combustion zone (not shown) formed downstream of the burner head 4.
- the annular gap, the pressurized combustion air L is supplied from a compressor of the gas turbine plant. The hot fuel gases flow into the turbine blading.
- the serving as a main burner second burner 1 is supplemented by the first, serving as a pilot burner burner 2, ie In natural gas mode, it is possible to switch from pilot burner to main burner mode with its lower NOx values after starting up and warming up.
- the first burner 2 serves to stabilize the flame.
- the second burner comprises nozzle tubes 5 and an air supply channel 6.
- the nozzle tubes are connected to a fuel supply system (not shown) and serve to mix petroleum, natural gas or other gaseous or liquid fuel with the supplied combustion air L.
- the air supply channel 6 passes the combustion air L if necessary with added fuel to the flame area.
- the ignition of the first burner 2 supplied air-fuel mixture via a rod or tubular electrode assembly with two ignition electrodes 7.
- the ignition electrodes 7 are mainly parallel to the axis of the first burner 2. In the region of the support plate 9 through which the ignition electrodes however, the distance of the ignition electrodes 7 from the outer wall of the first burner is significantly greater. The distance of the ignition electrodes 7 from each other is greater in the region of the support plate than in the region of the outer wall of the first burner 2.
- the ignition electrodes are fastened with connecting pieces 11 on the outside of the first burner 2.
- FIG. 2 is shown as an exemplary embodiment of a burner according to the invention, a burner 2, on the outer wall of two extending in the longitudinal direction of the burner 2 ignition electrodes 7 are mounted.
- the burner 2 can be used in particular as the first burner in the reference to FIG. 1 serve described burner assembly.
- the ignition electrodes of the burner 2 are covered by a protective element 8, which is formed in the present example as a U-shaped bent sheet 8.
- the legs of the sheet 8 each have an angled region, in they are attached to the outer wall of the burner 2.
- the attachment 10 is advantageously carried out by means of suitable detachable connecting elements, for example screws, so that, if necessary, access to the ignition electrodes 7 is possible.
- detachable connecting elements for example screws
- non-detachable connections are also possible instead of the detachable connection, for example welded connections.
- the U-shaped metal sheet extends at least over the front part of the ignition electrodes 7, ie the part which lies close to the electrode tips 12.
- the sheet 8 should be made of an impact resistant and rigid material such as e.g. Be made of steel.
- the distance of the sheet 8 from the ignition electrodes 7 should be at least so great that when a firing voltage applied to the ignition electrodes 7 no flashover between the fender 8 and the ignition electrodes 7 takes place.
- the concrete value for the distance depends on the dielectric strength of the medium between the electrodes 7 and the protective plate 8 as well as the geometry of the ignition electrodes and the temperature prevailing when the ignition voltage is applied. In the present embodiment with air as the medium, a safety distance of at least 5 mm should be maintained if the ignition voltage is 5 kV.
- FIG. 3 shows a torch 2 with two mounted on its outer wall ignition electrodes 7.
- This burner 2 in particular as the first burner in the reference to FIG. 1 serve described burner assembly.
- the longitudinal ribs 8 protrude from the surface of the burner 2 via the ignition electrodes 7, so that the ignition electrodes 7 are protected from shocks.
- the ribs 8 are fixedly connected to the wall of the burner 2.
- the attachment 10 can be made for example by welding or soldering. Releasable connections between the longitudinal ribs 8 and the burner 2, for example by means of screws, are indeed possible, but not detachable connections are completely ausrechend, since the arrangement does not significantly restrict the access to the ignition electrodes 7 and therefore the ribs 8 need not be removed for access to the electrodes 7.
- the ribs 8 should be made of an impact resistant and rigid material such as e.g. Be made of steel.
- the distance of the ribs from the ignition electrodes 7 should be at least 5 mm at an ignition voltage of 5 kV, so that no flashover between a firing electrode and a rib can take place.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
- Spark Plugs (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
Description
Die Erfindung betrifft einen Brenner mit einem Zünder und wenigstens einer Zündelektrode, insbesondere einen solchen für den Einbau in einen Brenner einer Gasturbine.The invention relates to a burner with an igniter and at least one ignition electrode, in particular one for installation in a burner of a gas turbine.
Ein als Pilotbrenner ausgebildeter Brenner mit einem Zünder und zum Zünder führenden Zündelektroden ist beispielsweise in
Beschädigungen oder Verbiegung einer oder beider am Pilotbrenner angebrachten Zündelektroden beim Transport oder Einbau können die Funktionstüchtigkeit der Zündelektroden negativ beeinflussen. Beschädigungen oder Verbiegung können daher den Austausch der Zündelektroden notwendig werden lassen.Damage to or bending of one or both of the ignition electrodes mounted on the pilot burner during transport or installation may adversely affect the performance of the ignition electrodes. Damage or bending may therefore necessitate replacement of the ignition electrodes.
Der Austausch der Zündelektroden kann auch notwendig werden, wenn eine der Elektroden so sehr verbogen ist, dass es anstatt zwischen den Elektrodenspitzen zwischen einer Elektrodenleitung und einem anderen metallischen Bauteil zum Stromüberschlag kommt und daher das Gasgemisch nicht gezündet werden kann.The replacement of the ignition electrodes may also be necessary if one of the electrodes is so bent that, instead of between the electrode tips between an electrode line and another metallic component to the electric flashover and therefore the gas mixture can not be ignited.
In
Zum Schutz des Bereiches der Zündelektrode, in dessen Nähe die Zündung stattfindet, sind in
Auch in
Allerdings sind in
Der Erfindung liegt die Aufgabe zugrunde, einen Gasturbinenbrenner mit wenigstens einer Zündelektrode zur Verfügung zu stellen, bei dem die oben genannte Problematik nicht oder nur in reduziertem Maße auftritt. Eine weitere Aufgabe der vorliegenden Erfindung ist es, eine Gasturbine mit einem vorteilhaften Gasturbinenbrenner zu Verfügung zu stellen.The invention has for its object to provide a gas turbine burner with at least one ignition electrode available, in which the above problem does not occur or only to a reduced extent. Another object of the present invention is to provide a gas turbine with an advantageous gas turbine combustor.
Diese Aufgabe wird durch einen Gasturbinenbrenner mit den Merkmalen des Anspruchs 1 und eine Gasturbine nach Anspruch 15 gelöst. Der Gasturbinenbrenner kann insbesondere als Pilotbrenner ausgebildet sein.This object is achieved by a gas turbine burner with the features of
Erfindungsgemäß besteht die Lösung der Aufgabe darin, dass der Brenner mit zwei an seiner Außenseite verlaufenden Zündelektroden ausgerüstet ist, wobei diesen Elektroden ein Schutzelement zugeordnet ist, welches über die Außenseite des Brenners und über die Zündelektrode hinaus vorsteht. Die erfindungsgemäße Gasturbine ist mit einem solchen Gasturbinenbrenner ausgestattet.According to the invention, the solution to the problem is that the burner is equipped with two ignition electrodes extending on its outer side, these electrodes being assigned a protective element which projects beyond the outside of the burner and beyond the ignition electrode. The gas turbine according to the invention is equipped with such a gas turbine burner.
Erfindungsgemäß ist der Abstand zwischen dem Schutzelement und den Zündelektroden mindestens so groß ist dass bei Anliegen einer Zündspannung an den Zündelektroden kein Überschlag zwischen dem Schutzelement und den Zündelektroden erfolgt, damit ein Stromüberschlag zwischen den Zündelektroden und dem Schutzelement zuverlässig vermieden werden kann.According to the invention, the distance between the protective element and the ignition electrodes is at least so great that when an ignition voltage is applied to the ignition electrodes, no flashover occurs between the protective element and the ignition electrodes, so that a current flashover between the ignition electrodes and the protective element can be reliably avoided.
Zudem umfasst der Gasturbinenbrenner zwei Zündelektroden mit jeweils einer Elektrodenspitze. Die Zündung erfolgt durch einen Funkenüberschlag an den Elektrodenspitzen beim Anlegen einer Zündspannung zwischen den beiden Zündelektroden. Die Zündung wird also nicht thermisch bewirkt. Zwar werden in
Der Vorteil der erfindungsgemäßen Lösung liegt also darin, dass die Zündelektroden geschützt sind und daher Beschädigungen beim Transport bzw. beim Ein- und Ausbau der Zündelektroden vermieden werden können. In
Vorteilhafte Weiterbildungen sind in den abhängigen Ansprüchen angegeben.Advantageous developments are specified in the dependent claims.
Bei einer vorteilhaften Weiterbildung der Erfindung ist das Schutzelement mit der Außenseite des Brenners verbunden, so dass die nötige Stabilität gewährleistet ist.In an advantageous embodiment of the invention, the protective element is connected to the outside of the burner, so that the necessary stability is ensured.
Eine andere vorteilhafte Weiterbildung besteht darin, dass das Schutzelement die Zündelektroden umgibt, wobei die Zündelektrode zumindest teilweise der Länge nach abgedeckt wird, so dass die wenigstens eine Zündelektrode optimal geschützt ist.Another advantageous development is that the protective element surrounds the ignition electrodes, wherein the ignition electrode is at least partially covered lengthwise, so that the at least one ignition electrode is optimally protected.
Außerdem kann das Schutzelement U-förmig ausgebildet und mit der offenen Seite and der Außenseite des Brenners befestigt sein, so dass die Zündelektrode von drei Seiten nach außen hin geschützt werden. Das Schutzelement kann die Elektroden zumindest im vorderen Bereich nahe den Elektrodenspitzen vollständig umschließen.In addition, the protective member may be U-shaped and fixed with the open side and the outside of the burner, so that the ignition electrode are protected from three sides to the outside. The protective element can completely enclose the electrodes at least in the front region near the electrode tips.
Alternativ kann das Schutzelement durch wenigstens eine Rippe gebildet sein, so dass eine bessere Zugänglichkeit der Zündelektroden gewährleistet ist. Die Rippe kann parallel zur Zündelektrode verlaufen. Es kann sich auch auf beiden Seiten der Zündelektrode jeweils mindestens eine Rippe befinden.Alternatively, the protective element may be formed by at least one rib, so that a better accessibility of the ignition electrodes is ensured. The rib can run parallel to the ignition electrode. There may also be at least one rib on each side of the ignition electrode.
Vorzugsweise wird das Schutzelement aus einem biegesteifen und stoßfesten Material hergestellt, so dass eine Verformung des Schutzelements, die zu einer Verformung der innen liegenden Zündelektroden führen könnte, vermieden wird.Preferably, the protective element is made of a rigid and impact-resistant material, so that a deformation of the protective element, which could lead to a deformation of the internal ignition electrodes, is avoided.
Das erfindungsgemäße Schutzelement kann vorzugsweise einem Bereich der Zündelektrode zugeordnet sein, der zur Elektrodenspitze hinführt. Das heißt, dass in diesem Fall das Schutzelement nicht bis an die Elektrodenspitze heranreicht und auch nicht über die Elektrodenspitze hinausragt. Vielmehr soll der Bereich der Elektrode geschützt werden, der an der Außenseite des Gasturbinenbrenners entlang verläuft, mit anderen Worten also die Zuleitung zum eigentlichen Zündbereich an der Elektrodenspitze.The protective element according to the invention may preferably be assigned to a region of the ignition electrode which leads to the electrode tip. This means that in this case the protective element does not reach as far as the electrode tip and does not protrude beyond the electrode tip. Rather, the area of the electrode is to be protected, which runs along the outside of the gas turbine burner, in other words, the supply line to the actual ignition at the electrode tip.
Weiterhin kann der erfindungsgemäße Gasturbinenbrenner grundsätzlich rotationssymmetrisch sein und sich die wenigstens eine an seiner Außenseite verlaufende Zündelektrode parallel zur Symmetrieachse des Gasturbinenbrenners erstrecken.Furthermore, the gas turbine burner according to the invention can in principle be rotationally symmetrical and the at least one ignition electrode extending on its outer side extend parallel to the axis of symmetry of the gas turbine burner.
Die erfindungsgemäße Gasturbine kann mit einem erfindungsgemäßen Gasturbinenbrenner in einer der beschriebenen Ausführungsvarianten ausgestattet sein.The gas turbine according to the invention can be equipped with a gas turbine burner according to the invention in one of the described embodiments.
Weitere Merkmale, Eigenschaften und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden Figuren. Es zeigt:
- FIG 1
- einen Brenner mit einer Zündelektrode,
- FIG 2
- einen Brenner mit Zündelektroden und einem Schutzelement, das einen U-förmigen Querschnitt aufweist und die Zündelektroden im vorderen Bereich umgibt,
- FIG 3
- einen Brenner mit Zündelektroden und einem Schutzelement, welches aus Rippen gebildet ist und parallel zu den Zündelektroden verläuft.
- FIG. 1
- a burner with an ignition electrode,
- FIG. 2
- a burner with ignition electrodes and a protective element which has a U-shaped cross-section and surrounds the ignition electrodes in the front region,
- FIG. 3
- a burner with ignition electrodes and a protective element, which is formed from ribs and runs parallel to the ignition electrodes.
Die in
Die Brenneranordnung besteht aus wenigstens einem an einer Trägerplatte (in
Der als Hauptbrenner dienende zweite Brenner 1 wird durch den ersten, als Pilotbrenner dienenden Brenner 2 ergänzt, d.h. bei Erdgasbetrieb kann nach dem Anfahren und Anwärmen vom Pilotbrenner- auf den Hauptbrennerbetrieb mit seinen geringeren NOx-Werten umgeschaltet werden. Der erste Brenner 2 dient dabei zur Stabilisierung der Flamme.The serving as a main burner
Der zweite Brenner umfasst Düsenrohre 5 und einen Luftzufuhrkanal 6. Die Düsenrohre sind an ein Brennstoffzuleitungssystem angeschlossen (nicht dargestellt) und dienen zur Vermischung von Erdöl, Erdgas oder einem anderen gasförmigen oder flüssigen Brennstoff mit der zugeführten Verbrennungsluft L. Der Luftzufuhrkanal 6 leitet die Verbrennungsluft L ggf. mit beigemischtem Brennstoff dem Flammenbereich zu.The second burner comprises nozzle tubes 5 and an
Die Zündung des dem ersten Brenner 2 zugeführten Luft-Brennstoff-Gemisches erfolgt über eine stab- oder rohrförmige Elektrodenanordnung mit zwei Zündelektroden 7. Die Zündelektroden 7 verlaufen hauptsächlich parallel zur Achse des ersten Brenners 2. Im Bereich der Trägerplatte 9, durch die die Zündelektroden 7 hindurchgeführt sind, ist der Abstand der Zündelektroden 7 von der Außenwand des ersten Brenners jedoch deutlich größer. Auch der Abstand der Zündelektroden 7 untereinander ist im Bereich der Trägerplatte größer als im Bereich der Außenwand des ersten Brenners 2. Die Zündelektroden sind mit Verbindungsstücken 11 auf der Außenseite des ersten Brenners 2 befestigt.The ignition of the
In
Die Zündelektroden des Brenners 2 sind durch ein Schutzelement 8 abgedeckt, das im vorliegenden Beispiel als U-förmig gebogenes Blech 8 ausgebildet ist. Die Schenkel des Bleches 8 weisen jeweils einen abgewinkelten Bereich auf, in dem sie an der Außenwand des Brenners 2 befestigt sind. Die Befestigung 10 erfolgt vorteilhafterweise durch geeignete lösbare Verbindungselemente, z.B. Schrauben, damit im Bedarfsfall ein Zugang zu den Zündelektroden 7 möglich ist. Statt der lösbaren Verbindung sind grundsätzlich auch nicht lösbare Verbindungen möglich, bspw. Schweißverbindungen. Das U-förmige Blech erstreckt sich zumindest über den vorderen Teil der Zündelektroden 7, d.h. den Teil, der nahe den Elektrodenspitzen 12 liegt.The ignition electrodes of the
Das Blech 8 sollte aus einem stoßfesten und biegesteifen Werkstoff wie z.B. Stahl gefertigt sein. Der Abstand des Bleches 8 von den Zündelektroden 7 sollte mindestens so groß sein, dass bei Anliegen einer Zündspannung an den Zündelektroden 7 kein Überschlag zwischen dem Schutzblech 8 und den Zündelektroden 7 erfolgt. Der konkrete Wert für den Abstand hängt von der Durchschlagsfestigkeit des Mediums zwischen den Elektroden 7 und dem Schutzblech 8 sowie der Geometrie der Zündelektroden und der bei Anliegen der Zündspannung herrschenden Temperatur ab. Im vorliegenden Ausführungsbeispiel mit Luft als Medium sollte ein Sicherheitsabstand von mindestens 5 mm eingehalten werden, wenn die Zündspannung 5 kV beträgt.The
Rechts und links von den Zündelektroden 7 des in
Wie das Blech des ersten Ausführungsbeispiels sollten die Rippen 8 aus einem stoßfesten und biegesteifen Werkstoff wie z.B. Stahl gefertigt sein. Der Abstand der Rippen von den Zündelektroden 7 sollte bei einer Zündspannung von 5 kV mindestens 5 mm betragen, damit kein Stromüberschlag zwischen einer Zündelektrode und einer Rippe stattfinden kann.Like the sheet of the first embodiment, the
Abschließend sei angemerkt, dass sämtlichen Merkmalen, die in den Anmeldungsunterlagen und insbesondere in den abhängigen Ansprüchen genannt sind, trotz des vorgenommenen formalen Rückbezuges auf einen oder mehrere bestimmte Ansprüche, auch einzeln oder in beliebiger Kombination eigenständiger Schutz zukommen soll.Finally, it should be noted that all the features that are mentioned in the application documents and in particular in the dependent claims, despite the formal reference to one or more specific claims, even individually or in any combination should receive independent protection.
Claims (13)
- Gas turbine burner (2) comprising two ignition electrodes (7) each having an electrode tip (12), wherein a sparkover takes place at the electrode tips when an ignition voltage is applied between the two ignition electrodes, wherein the ignition electrodes (7) run on the burner's exterior, wherein the ignition electrodes (7) are assigned a protective element (8) which projects beyond the exterior of the burner (2) and beyond the ignition electrodes (7), wherein the distance between the protective element (8) and the ignition electrodes (7) is at least sufficiently great such that no sparkover takes place between the protective element (8) and the ignition electrodes (7) when an ignition voltage is applied to the ignition electrodes (7), wherein the actual value for the distance is dependent at least on the geometry of the ignition electrodes and the temperature prevailing when the ignition voltage is applied.
- Gas turbine burner (2) according to claim 1, wherein the protective element (8) is connected to the exterior of the burner (2).
- Gas turbine burner (2) according to claim 1 and 2, wherein the protective element (8) surrounds the ignition electrodes (7), wherein the ignition electrodes (7) are at least partially covered lengthwise.
- Gas turbine burner (2) according to claim 3, wherein the protective element (8) is embodied as U-shaped in cross-section and is secured with the open side on the exterior of the burner (2).
- Gas turbine burner (2) according to claim 4, wherein the protective element (8) encloses the ignition electrodes (7) at least in the front area close to the electrode tips.
- Gas turbine burner (2) according to claim 1 or 2, wherein the protective element (8) includes at least one rib.
- Gas turbine burner (2) according to claim 6, wherein the rib (8) extends parallel to the ignition electrodes (7).
- Gas turbine burner (2) according to claim 6 or 7, wherein at least one rib is disposed on each of the two sides of the ignition electrodes.
- Gas turbine burner (2) according to one of the preceding claims, wherein the protective element (8) is made of a flexurally resistant and shockproof material.
- Gas turbine burner (2) according to one of the preceding claims, wherein the burner is embodied as a pilot burner for a burner arrangement.
- Gas turbine burner (2) according to one of the preceding claims, wherein the protective element is assigned to an area of the ignition electrodes (7) which leads to the electrode tip.
- Gas turbine burner (2) according to one of the preceding claims, wherein it is rotationally symmetrical and the at least one ignition electrode (7) running on its exterior extends parallel to the axis of symmetry of the gas turbine burner (2).
- Gas turbine having a gas turbine burner (2) according to one of the preceding claims.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07788421A EP2054669B1 (en) | 2006-08-23 | 2007-08-14 | Burner with a protective element for ignition electrodes |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06017534A EP1892474A1 (en) | 2006-08-23 | 2006-08-23 | Burner with protection element for ignition electrodes |
EP07788421A EP2054669B1 (en) | 2006-08-23 | 2007-08-14 | Burner with a protective element for ignition electrodes |
PCT/EP2007/058411 WO2008022948A1 (en) | 2006-08-23 | 2007-08-14 | Burner with a protective element for ignition electrodes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2054669A1 EP2054669A1 (en) | 2009-05-06 |
EP2054669B1 true EP2054669B1 (en) | 2010-03-31 |
Family
ID=37606836
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06017534A Withdrawn EP1892474A1 (en) | 2006-08-23 | 2006-08-23 | Burner with protection element for ignition electrodes |
EP07788421A Active EP2054669B1 (en) | 2006-08-23 | 2007-08-14 | Burner with a protective element for ignition electrodes |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06017534A Withdrawn EP1892474A1 (en) | 2006-08-23 | 2006-08-23 | Burner with protection element for ignition electrodes |
Country Status (11)
Country | Link |
---|---|
US (1) | US8327616B2 (en) |
EP (2) | EP1892474A1 (en) |
JP (2) | JP2010501767A (en) |
KR (1) | KR101391212B1 (en) |
CN (1) | CN101501401B (en) |
AT (1) | ATE462933T1 (en) |
DE (1) | DE502007003342D1 (en) |
ES (1) | ES2342500T3 (en) |
PT (1) | PT2054669E (en) |
RU (1) | RU2439433C2 (en) |
WO (1) | WO2008022948A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2012060A1 (en) * | 2007-07-03 | 2009-01-07 | Siemens Aktiengesellschaft | Three-point anchorage of ignition electrodes of a burner |
EP2387737B1 (en) | 2008-11-21 | 2014-06-25 | Siemens Aktiengesellschaft | Method and measurement device for determining a condition of an electric igniter of a gas turbine burner and an ignition device for a gas turbine burner |
GB2489963B (en) * | 2011-04-13 | 2015-11-04 | Rolls Royce Plc | Fuel injector arrangement having an igniter |
RU2493489C2 (en) * | 2011-07-28 | 2013-09-20 | Общество с ограниченной ответственностью "Энерго Эстейт" | Method of safe burner operation in wide range of loads |
CN109595587B (en) * | 2017-09-30 | 2024-01-16 | 宁波方太厨具有限公司 | Ignition needle and gas burner using same |
CN109838816B (en) * | 2017-11-29 | 2023-11-17 | 宁波方太厨具有限公司 | Gas stove ignition needle and combustor provided with same |
Family Cites Families (22)
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US2850084A (en) * | 1954-03-19 | 1958-09-02 | Robertshaw Fulton Coutrols Com | Electric ignition device for gaseous fuel |
FR1592091A (en) * | 1968-02-27 | 1970-05-11 | ||
US3823345A (en) * | 1971-01-19 | 1974-07-09 | J Willson | Electric igniter construction |
JPS5130904U (en) * | 1974-08-28 | 1976-03-05 | ||
JPS5130904A (en) * | 1974-09-09 | 1976-03-16 | Seiko Koki Kk | DOKIMOOTAATONISHOSARERUDENJIKUDOSOCHI |
US4029936A (en) * | 1975-01-13 | 1977-06-14 | The Tappan Company | Igniter assembly |
JPS5257106U (en) * | 1975-10-23 | 1977-04-25 | ||
JPS5257106A (en) * | 1975-11-06 | 1977-05-11 | Shiyouji Nanba | Stable high concentrated liquid alminium alkolate composition with easy handling |
US4149373A (en) * | 1977-08-29 | 1979-04-17 | United Technologies Corporation | Combustion chamber stress reducing means |
EP0193838B1 (en) * | 1985-03-04 | 1989-05-03 | Siemens Aktiengesellschaft | Burner disposition for combustion installations, especially for combustion chambers of gas turbine installations, and method for its operation |
DE3536198A1 (en) * | 1985-10-10 | 1987-04-16 | Webasto Werk Baier Kg W | IGNITION SPARKER FOR FUEL-OPERATED HEATER |
EP0228091A3 (en) * | 1986-01-03 | 1988-08-24 | A/S Kongsberg Väpenfabrikk | Axially compact gas turbine burner and method for cooling same |
US4903476A (en) * | 1988-12-27 | 1990-02-27 | General Electric Company | Gas turbine igniter with ball-joint support |
US5393224A (en) * | 1993-12-02 | 1995-02-28 | American Standard Inc. | Ignitor assembly for power burner furnace |
US5465571A (en) * | 1993-12-21 | 1995-11-14 | United Technologies Corporation | Fuel nozzle attachment in gas turbine combustors |
US5802859A (en) * | 1996-12-16 | 1998-09-08 | Hudson Technologies, Inc. | Apparatus for recovering and analyzing volatile refrigerants |
US5860804A (en) * | 1997-10-30 | 1999-01-19 | Societe En Commandite Gaz Metropolitain | Baffle ignitor assembly |
JP3875395B2 (en) * | 1998-03-24 | 2007-01-31 | 財団法人石油産業活性化センター | Catalytic combustion equipment |
US5856651A (en) * | 1998-04-06 | 1999-01-05 | Surface Igniter Corporation | Shield for a hot surface ignitor and method for fabricating a shield |
US6777650B1 (en) * | 2000-02-04 | 2004-08-17 | Saint-Gobtain Industrial Ceramics, Inc. | Igniter shields |
CN100510538C (en) * | 2003-08-22 | 2009-07-08 | 株式会社能率 | Ignition unit |
DE202004006644U1 (en) * | 2004-04-27 | 2004-08-26 | Buderus Heiztechnik Gmbh | electrode |
-
2006
- 2006-08-23 EP EP06017534A patent/EP1892474A1/en not_active Withdrawn
-
2007
- 2007-08-14 US US12/310,284 patent/US8327616B2/en active Active
- 2007-08-14 EP EP07788421A patent/EP2054669B1/en active Active
- 2007-08-14 AT AT07788421T patent/ATE462933T1/en active
- 2007-08-14 WO PCT/EP2007/058411 patent/WO2008022948A1/en active Application Filing
- 2007-08-14 CN CN2007800289382A patent/CN101501401B/en active Active
- 2007-08-14 PT PT07788421T patent/PT2054669E/en unknown
- 2007-08-14 RU RU2009110175/06A patent/RU2439433C2/en active
- 2007-08-14 KR KR1020097005879A patent/KR101391212B1/en active IP Right Grant
- 2007-08-14 DE DE502007003342T patent/DE502007003342D1/en active Active
- 2007-08-14 ES ES07788421T patent/ES2342500T3/en active Active
- 2007-08-14 JP JP2009525023A patent/JP2010501767A/en active Pending
-
2011
- 2011-12-22 JP JP2011281519A patent/JP5484436B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
RU2009110175A (en) | 2010-09-27 |
WO2008022948A1 (en) | 2008-02-28 |
EP1892474A1 (en) | 2008-02-27 |
KR101391212B1 (en) | 2014-05-02 |
CN101501401B (en) | 2011-01-26 |
ATE462933T1 (en) | 2010-04-15 |
EP2054669A1 (en) | 2009-05-06 |
JP2010501767A (en) | 2010-01-21 |
CN101501401A (en) | 2009-08-05 |
JP2012107624A (en) | 2012-06-07 |
ES2342500T3 (en) | 2010-07-07 |
PT2054669E (en) | 2010-04-21 |
DE502007003342D1 (en) | 2010-05-12 |
JP5484436B2 (en) | 2014-05-07 |
KR20090048508A (en) | 2009-05-13 |
US8327616B2 (en) | 2012-12-11 |
US20110120077A1 (en) | 2011-05-26 |
RU2439433C2 (en) | 2012-01-10 |
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