EP0592717B1 - Gas-operated premix burner - Google Patents
Gas-operated premix burner Download PDFInfo
- Publication number
- EP0592717B1 EP0592717B1 EP92117673A EP92117673A EP0592717B1 EP 0592717 B1 EP0592717 B1 EP 0592717B1 EP 92117673 A EP92117673 A EP 92117673A EP 92117673 A EP92117673 A EP 92117673A EP 0592717 B1 EP0592717 B1 EP 0592717B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- fuel
- premixing
- nozzles
- gas
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/40—Mixing tubes or chambers; Burner heads
- F23D11/402—Mixing chambers downstream of the nozzle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/70—Baffles or like flow-disturbing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
- F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/07002—Premix burners with air inlet slots obtained between offset curved wall surfaces, e.g. double cone burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/007—Mixing tubes, air supply regulation
Definitions
- the invention relates to a gas-powered premix burner for the combustion chamber, for example a gas turbine which within a pre-mixing space over a plurality Fuel injected from nozzles prior to ignition is intensively mixed with the combustion air, the Nozzles are arranged around a burner axis.
- premix burners where flame burners can be dispensed with are in the form of double-cone burners known from EP-B1-0 321 809.
- the invention tries to avoid all these disadvantages. It is based on the task of creating a measure by means of which the combustion chamber can be operated as close as possible to the lean extinguishing limit, ie in the area in which practically no NO x is produced.
- the burner is operational with a very lean mixture remain, the regulation can be simplified in that that now when loading and unloading the combustion chamber Air number ranges can be traversed with the previous premix combustion with a uniform fuel profile because of their lean extinction limit, as a rule could not be driven through.
- the schematically shown premix burner is a so-called double-cone burner, such as that used for example is known from EP-B1-0 321 809.
- Such Burners can, for example, in the dome-shaped conclusion Single combustion chamber or arranged in an annular combustion chamber be.
- the burner consists essentially of two hollow, conical ones Partial bodies 11, 12 which are nested in the flow direction are. Here are the respective central axes 13, 14 of the two partial bodies offset from one another. The neighboring walls of the two partial bodies form in their Longitudinal extension tangential slots 15 for the combustion air, which in this way in the premixing chamber 21 Inside the burner.
- the burner is in the example with gaseous fuel operated.
- Gas inflow openings 17 are provided in the form of nozzles. These nozzles are made up of one manifold per cone 18 supplied, which in turn is fed by the gas supply line 19 becomes.
- the fuel control takes place via the control valve 20.
- the mixture formation begins in such a gas operation with the combustion air already in the zone the entry slots 15.
- the required NO x limit values can be easily fallen below.
- the stability limit is low due to the low flame temperature.
- the range between ignitability and extinguishing is relatively narrow for the safe operation of the combustion chamber over the full load range.
- the additional amount of gas injected causes a premixed enrichment on the axis 10 of the burner.
- At the burner outlet there is therefore an uneven distribution of fuel over the cross-section acted upon and thus zones with different excess air numbers.
- the largely independent core flame generated in this way in the area of the burner axis is considerably more stable than the main flame surrounding it and produced with the evenly distributed fuel concentration.
- NO x accumulation is still lower than with a burner piloted with a diffusion flame.
- the decisive factor in any case is the improved extinguishing limit without a corresponding increase in NO x .
- the new measure which in the majority of the operating area guarantees a mode of operation at the extinguishing limit, means that the NO x values of 20 ppm that can be achieved today can certainly be significantly undercut.
- the invention is also not limited to Premix burner of the double cone type, in which the Mixture enrichment takes place in the burner axis, but it can be used in all combustion chamber zones in which one Flame stabilization through a prevailing air velocity field is produced.
- the illustrated double-cone burner could also be considered a mixed oil / gas driving style in the tip of the cone still with one lying in the burner axis
- the fuel can come from this at a certain angle be injected into the hollow cone.
- the resulting conical Liquid fuel profile is flowing from the tangential Combustion air enclosed. In the axial direction the concentration of fuel continuously as a result of Mixing with the combustion air reduced.
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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)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Description
Die Erfindung betrifft einen gasbetriebenen Vormischbrenner für die Brennkammer beispielsweise einer Gasturbine, bei welchem innerhalb eines Vormischraumes der über eine Mehrzahl von Düsen eingespritzte Brennstoff vorgängig der Zündung mit der Brennluft intensiv vermischt wird, wobei die Düsen um eine Brennerachse herum angeordnet sind.The invention relates to a gas-powered premix burner for the combustion chamber, for example a gas turbine which within a pre-mixing space over a plurality Fuel injected from nozzles prior to ignition is intensively mixed with the combustion air, the Nozzles are arranged around a burner axis.
Es sind Brennkammern für Gasturbinen auf der Basis von Vormischbrennern bekannt, beispielsweise aus der EP-B1-29 619. Darin läuft innerhalb einer Anzahl rohrförmiger Elemente zwischen dem eingespritztem Brennstoff und der Verdichterluft ein Vormisch/Vorverdampfungsprozess bei grosser Luftüberschusszahl ab, bevor der eigentliche Verbrennungsprozess stromabwärts eines Flammenhalters stattfindet. Mit dieser Massnahme können die Emissionswerte an Schadstoffen aus der Verbrennung erheblich reduziert werden.They are combustion chambers for gas turbines based on premix burners known, for example from EP-B1-29 619. It runs within a number of tubular elements between the injected fuel and the compressor air a premixing / pre-evaporation process with a large excess of air before the actual combustion process takes place downstream of a flame holder. With this The measure can reduce the emission values of pollutants from the Combustion can be significantly reduced.
Die Verbrennung mit der grösstmöglichen Luftüberschusszahl, - einmal dadurch gegeben, dass die Flamme überhaupt noch brennt und im weiteren dadurch, dass nicht zuviel CO entsteht - vermindert indessen nicht nur die Schadstoffmenge an NOx, sondern bewirkt darüberhinaus auch die Tiefhaltung anderer Schadstoffe, nämlich wie bereits erwähnt von CO und von unverbrannten Kohlenwasserstoffen. Dies erlaubt die Wahl einer grösseren Luftüberschusszahl, wobei dann zwar zunächst grössere Mengen CO entstehen, diese aber zu CO2 weiter reagieren können, so dass schliesslich die CO-Emissionen gering bleiben. Andererseits aber bildet sich wegen des grossen Luftüberschusses nur wenig zusätzliches NO. Da mehrere rohrförmige Elemente bei dieser bekannten Brennkammer das Vormischen übernehmen, werden bei der Lastregelung jeweils nur soviele Elemente mit Brennstoff betrieben, dass sich für die jeweiliege Betriebsphase (Start, Teillast, Vollast) die optimale Luftüberschusszahl ergibt.Combustion with the largest possible excess of air, given that the flame is still burning and then that not too much CO is produced, not only reduces the amount of NO x pollutants, but also lowers other pollutants, namely how already mentioned about CO and unburned hydrocarbons. This allows a larger excess air number to be selected, with larger quantities of CO initially initially being produced, but these being able to react further to CO 2 , so that ultimately the CO emissions remain low. On the other hand, due to the large excess of air, little additional NO is formed. Since several tubular elements take over the premixing in this known combustion chamber, only so many elements are operated with fuel in the load control that the optimum excess air number results for the respective operating phase (start, part load, full load).
Andere Typen von Vormischbrennern, bei denen auf Flammenhalter verzichtet werden kann, sind in Form der Doppelkegelbrenner nach EP-B1-0 321 809 bekannt.Other types of premix burners where flame burners can be dispensed with are in the form of double-cone burners known from EP-B1-0 321 809.
Alle Brennkammern mit Vormischbrennern weisen jedoch die Unzulänglichkeit auf, dass zumindest in den Betriebszuständen, in denen nur ein Teil der Brenner mit Brennstoff betrieben wird, oder bei denen die einzelnen Brenner mit einer verringerten Brennstoffmenge beaufschlagt werden, nahe an die Grenze der Flammenstabilität gestossen wird. In der Tat wird die Löschgrenze aufgrund des sehr mageren Gemisches und der sich daraus ergebenden niedrigen Flammentemperatur bei typischen Gasturbinenbedingungen schon bei einer Luftüberschusszahl von etwa 2,0 erreicht.All combustion chambers with premix burners, however, have the Inadequacy on that at least in the operating states, in which only part of the burners are fueled is operated, or in which the individual burners with a reduced amount of fuel are applied to the limit of flame stability. In the The deletion limit becomes due to the very lean mixture and the resulting low flame temperature with typical gas turbine conditions even with an excess air figure of about 2.0 reached.
Diese Tatsache führt zu einer relativ komplizierten Fahrweise der Brennkammer mit entsprechend aufwendiger Regelung. Eine andere Möglichkeit, den Betriebsbereich von Vormischbrennern zu erweitern, wird in der Stützung des Brenners mittels einer kleinen Diffusionsflamme gesehen. Diese Pilotflamme erhält ihren Brennstoff rein, oder zumindest schlecht vorgemischt, was einerseits zwar zu einer stabilen Flamme führt, andererseits jedoch die für Diffusionsverbrennung typischen hohen NOx-Emissionen zur Folge hat. This fact leads to a relatively complicated operation of the combustion chamber with a correspondingly complex regulation. Another way of expanding the operating range of premix burners is to support the burner with a small diffusion flame. This pilot flame receives its fuel pure, or at least poorly premixed, which on the one hand leads to a stable flame but on the other hand results in the high NO x emissions typical of diffusion combustion.
Bei der zum Stand der Technik zählenden Brennkammer nach US-A-4,100,733 sind eine Mehrzahl von radial gestaffelten Vormischbrennern erkennbar, welche im wesentlichen jeweils aus dem radial äusseren System (Brennstoffkammer 28, Düse 42, Mischraum 40) und dem radial inneren System (Brennstoffkammer 30, Düse 46, Mischraum 44) bestehen. Der Mischraum (40,44) dieser Vormischbrenner wird nicht aus zwei unterschiedlichen Brennstoffsytemen angespeist, wodurch eine Variation des Brennstoffprofils am Brenneraustritt nicht möglich ist. Darüberhinaus werden diese bekannten Vormischbrenner unabhängig voneinander betrieben und zwar so, dass bei allen Betriebsbedingungen das radial äussere System immer mit einem hinreichend fetten Gemisch betrieben wird. Dies gilt auch für das Anfahren und den Teillastbetrieb. Eine gezielte Beeinflussung des Brennstoffprofils am Austritt des Brenners findet demnach bei der Brennkammer nach US-A-4,100,733 nicht statt. Vielmehr kann dort nur die Brennstoffkonzentration über dem Eintrittsquerschnitt der Brennkammer beeinflusst werden durch entsprechende Fahrweise aller Brenner. In the prior art combustor according to US-A-4,100,733 are a plurality of radially staggered Premix burners recognizable, which are essentially each from the radially outer system (fuel chamber 28, nozzle 42, mixing chamber 40) and the radially inner system (Fuel chamber 30, nozzle 46, mixing space 44) exist. Of the Mixing room (40,44) this premix burner does not become two different fuel systems, resulting in a No variation in the fuel profile at the burner outlet is possible. In addition, these well-known premix burners operated independently of each other in such a way that the radially outer system in all operating conditions is always operated with a sufficiently rich mixture. This also applies to start-up and part-load operation. A targeted influence on the fuel profile at the outlet the burner therefore finds the combustion chamber US-A-4,100,733 does not take place. Rather, only that can Fuel concentration over the inlet cross section of the The combustion chamber can be influenced by the appropriate driving style all burners.
Die Erfindung versucht all diese Nachteile zu vermeiden. Ihr liegt die Aufgabe zugrunde, eine Massnahme zu schaffen, mittels der die Brennkammer möglichst nahe an der mageren Löschgrenze betrieben werden kann, d.h. in jenem Bereich, in dem praktisch kein NOx entsteht.The invention tries to avoid all these disadvantages. It is based on the task of creating a measure by means of which the combustion chamber can be operated as close as possible to the lean extinguishing limit, ie in the area in which practically no NO x is produced.
Erfindungsgemäss wird dies bei einem Vormischbrenner der eingangs genannten Art mit den kennzeichnenden Merkmalen des Patentanspruchs 1 erreicht.According to the invention, this is the case with a premix burner initially mentioned type with the characteristic features of the Claim 1 reached.
Die Vorteile der Erfindung sind unter anderem in der reinen Stützung der Brennkammer in kritischen Phasen zu sehen, beispielsweise bei vorübergehendem Auftreten von Schwingungen, bei denen das Löschlimit für Vormischverbrennung mit gleichmässigem Brennstoffprofil zeitweilig überschritten werden kann. Durch die Anreicherung des Brennstoffprofils im Bereich der Brennerachse und die dadurch geschaffenenen Zonen mit unterschiedlicher Luftüberschusszahl kann die erzeugte Flamme wesentlich stabiler gehalten werden.The advantages of the invention are among others in the pure Supporting the combustion chamber can be seen in critical phases, for example if vibrations occur temporarily, where the extinguishing limit for premix combustion with uniform Fuel profile can be exceeded temporarily can. By enriching the fuel profile in the Area of the burner axis and the created Zones with different excess air numbers can generated flame can be kept much more stable.
Dadurch, dass die Brenner bei sehr magerem Gemisch betriebsfähig bleiben, kann die Regelung insofern vereinfacht werden, dass nunmehr beim Belasten und Entlasten der Brennkammer Luftzahlbereiche durchquert werden können, die mit der bisherigen Vormischverbrennung mit gleichmässigem Brennstoffprofil wegen deren magerer Löschgrenze in der Regel nicht durchfahren werden könnten.Because the burner is operational with a very lean mixture remain, the regulation can be simplified in that that now when loading and unloading the combustion chamber Air number ranges can be traversed with the previous premix combustion with a uniform fuel profile because of their lean extinction limit, as a rule could not be driven through.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung
anhand eines Vormsichbrenners der Doppelkegelbauart schematisch
dargestellt.
Es zeigen:
- Fig.1
- einen Längsschnitt durch einen Vormischbrenner;
- Fig.2
- einen Querschnitt durch den Vormischbrenner;
Show it:
- Fig. 1
- a longitudinal section through a premix burner;
- Fig. 2
- a cross section through the premix burner;
Es sind nur die für das Verständnis der Erfindung wesentlichen Elemente gezeigt. Nicht dargestellt sind beispielsweise die Zu-und Anordnung des Brenners in der Brennkammer, die Brennstoffbereitstellung, die Regeleinrichtungen und dergleichen, Die Strömungsrichtung der Arbeitsmittel ist mit Pfeilen bezeichnet.It is only essential for understanding the invention Elements shown. For example, are not shown the allocation and arrangement of the burner in the combustion chamber, the Fuel supply, the control devices and the like, The direction of flow of the work equipment is with Arrows.
Beim schematisch dargestellten Vormischbrenner handelt es sich um einen sogenannten Doppelkegelbrenner, wie er beispielsweise aus der EP-B1-0 321 809 bekannt ist. Solche Brenner können beispielsweise im domförmigen Abschluss einer Einzelbrennkammer oder in einer Ringbrennkammer angeordnet sein.The schematically shown premix burner is a so-called double-cone burner, such as that used for example is known from EP-B1-0 321 809. Such Burners can, for example, in the dome-shaped conclusion Single combustion chamber or arranged in an annular combustion chamber be.
Im wesentlichen besteht der Brenner aus zwei hohlen, kegelförmigen
Teilkörpern 11, 12 die in Strömungsrichtung ineinandergeschachtelt
sind. Dabei sind die jeweiligen Mittelachsen
13, 14 der beiden Teilkörper gegeneinander versetzt. Die
benachbarten Wandungen der beiden Teilkörper bilden in deren
Längserstreckung tangentiale Schlitze 15 für die Verbrennungsluft,
die auf diese Weise in den Vormischraum 21 im
Brennerinneren gelangt.The burner consists essentially of two hollow, conical ones
Der Brenner wird im Beispielsfall mit gasförmigem Brennstoff
betrieben. Hierzu sind im Bereich der tangentialen Schlitze
in den Wandungen der beiden Teilkörper in Längsrichtung verteilte
Gaseinströmöffnungen 17 in Form von Düsen vorgesehen.
Diese Düsen werden pro Teilkegel aus je einer Sammelleitung
18 versorgt, welche ihrerseits von der Gaszuleitung 19 angespeist
wird. Die Brennstoffregelung erfolgt über das Regelventil
20. In einem solchen Gasbetrieb beginnt die Gemischbildung
mit der Verbrennungsluft somit bereits in der Zone
der Eintrittsschlitze 15.The burner is in the example with gaseous fuel
operated. For this purpose, in the area of the tangential slots
distributed in the walls of the two partial bodies in the longitudinal direction
Am Brenneraustritt 22 stellt sich eine möglichst homogene
Brennstoffkonzentration über dem beaufschlagten kreiringförmigen
Querschnitt ein. Es entsteht am Brenneraustritt eine
definierte kalottenförmige Rückströmzone, an deren Spitze
die Zündung erfolgt.At the
Mit einer solchen Vormischverbrennung sind sind die verlangten NOx-Grenzwerte ohne weiteres zu unterschreiten. Jedoch ist die Stabilitätsgrenze wegen der tiefen Flammentemperatur niedrig. Der Bereich zwischen Zündvermögen und Löschen ist relativ schmal zum sicheren Betrieb der Brennkammer über den vollen Lastbereich.With such a premix combustion, the required NO x limit values can be easily fallen below. However, the stability limit is low due to the low flame temperature. The range between ignitability and extinguishing is relatively narrow for the safe operation of the combustion chamber over the full load range.
Gemäss der Erfindung ist nunmehr vorgesehen, die möglichst
homogene Brennstoffkonzentration gezielt zu stören und zwar
in der Weise, dass im Bereich der Brennerachse 10 in der
Austrittsebene 22 des Brenners eine höhere Brennstoffkonzentration
vorliegt, welche eine stabile Flamme gewährleistet.According to the invention it is now provided that as possible
To disrupt homogeneous fuel concentration in a targeted manner
in such a way that in the region of the
Hierzu sind zusätzliche Brennstoffdüsen 23 im Bereich der
Kegelspitze angeordnet, an einer Stelle demnach, an welcher
relativ wenig Verbrennungsluft in den Vormmischraum einströmt.
Sie sind über eine getrennte Brennstoffleitung 24
mit Gas versorgt. Zur Feineinstellung der Gasmenge ist in
der Leitung 24 ein Regelventil 25 angeordnet.For this purpose, there are
Die zusätzlich eingedüste Gasmenge bewirkt eine vorgemischte
Anfettung auf der Achse 10 des Brenners. Am Brenneraustritt
entsteht somit eine ungleichmässige Brennstoffverteilung
über dem beaufschlagten Querschnitt und damit Zonen mit
unterschiedlicher Luftüberschusszahl. Die im Bereich der
Brennerachse so erzeugte weitgehend unabhängige Kernflamme
ist wesentlich stabiler als die sie umgebende, mit der
gleichmässig verteilten Brennstoffkonzentration erzeugten
Hauptflamme. Zwar ist nicht zu vermeiden, dass abhängig von
der vorherrschenden Luftüberschusszahl in diesem Bereich
etwas mehr NOx produziert wird, jedoch ist dieser NOx-Anfall
immer noch tiefer als bei einem mit einer Diffusionsflammme
pilotierten Brenner. Ausschlaggebend ist in jedem Fall die
verbesserte Löschgrenze ohne entsprechenden NOx-Anstieg.The additional amount of gas injected causes a premixed enrichment on the
Diese Stabilisierungshilfe in Form der ungleichmässig verteilten,
jedoch vorgemischten Brennstoffverteilung kann in
Betriebsbereichen, in denen sie nicht notwendig ist, durch
einfaches Absperren des Regelventils 25 abgestellt werden.This stabilization aid in the form of the unevenly distributed,
however premixed fuel distribution can be in
Operating areas in which it is not necessary
simply shut off the
Die neue Massnahme, welche im überwiegendem Betriebsbereich eine Fahrweise auf der Löschgrenze gewährleistet, führt demnach dazu, dass mit Sicherheit die heute erreichbaren NOx-Werte von 20 ppm ganz erheblich unterschritten werden können.The new measure, which in the majority of the operating area guarantees a mode of operation at the extinguishing limit, means that the NO x values of 20 ppm that can be achieved today can certainly be significantly undercut.
Selbstverständlich ist die Erfindung nicht auf das dargestellte und beschriebene Ausführungsbeispiel beschränkt. In Abweichung zur gezeigten Anordnung mit Zusatzdüsen könnte das "verstimmte" Brennstoffprofil in der Brenneraustrittsebene auch durch ungleichmässige Teilung der Einspritzdüsen innerhalb des Brenners erreicht werden. Oder durch unterschiedliche Düsenquerschnitte bei gleichmässiger Teilung. Mit all diesen Massnahmen können die gewünschten "fetteren" Strähnen im Gemisch erzielt werden.Of course, the invention is not limited to that shown and described embodiment limited. In Deviation from the arrangement shown with additional nozzles could the "detuned" fuel profile in the burner outlet level also due to the uneven division of the injection nozzles can be reached within the burner. Or through different ones Nozzle cross-sections with even division. With all these measures, the desired "fatter" Strands can be achieved in the mixture.
Grundsätzlich ist die Erfindung auch nicht beschränkt auf Vormischbrenner der Doppelkegelbauart, bei welchen die Gemisch-Anfettung in der Brennerachse erfolgt, sondern sie ist in allen Brennkammerzonen anwendbar, in denen eine Flammenstabilisierung durch ein vorherrschendes Luftgeschwindigkeitsfeld erzeugt wird.In principle, the invention is also not limited to Premix burner of the double cone type, in which the Mixture enrichment takes place in the burner axis, but it can be used in all combustion chamber zones in which one Flame stabilization through a prevailing air velocity field is produced.
Der dargestellte Doppelkegelbrenner könnte überdies hinsichtlich einer gemischten Öl/Gas-Fahrweise in der Kegelspitze noch mit einer mit einer in der Brennerachse liegenden Brennstoffdüse für flüssigen Brennstoff ausgerüstet sein. Der Brennstoff kann hieraus in einem gewissen Winkel in den Hohlkegel eingedüst werden. Das entstehende kegelige Flüssigbrennstoffprofil wird von der tangential einströmenden Verbrennungsluft umschlossen. In axialer Richtung wird die Konzentration des Brennstoffes fortlaufend infolge der Vermischung mit der Verbrennungsluft abgebaut.The illustrated double-cone burner could also be considered a mixed oil / gas driving style in the tip of the cone still with one lying in the burner axis Fuel nozzle equipped for liquid fuel be. The fuel can come from this at a certain angle be injected into the hollow cone. The resulting conical Liquid fuel profile is flowing from the tangential Combustion air enclosed. In the axial direction the concentration of fuel continuously as a result of Mixing with the combustion air reduced.
- 1010th
- BrennerachseBurner axis
- 1111
- TeilkörperPartial body
- 1212th
- TeilkörperPartial body
- 1313
- Mittelachse von 11Central axis of 11
- 1414
- Mittelachse von 12Central axis of 12
- 1515
- tangentiale Schlitzetangential slots
- 1717th
- GaseinströmöffnungGas inflow opening
- 1818th
- SammelleitungManifold
- 1919th
- GaszuleitungGas supply
- 2020th
- Regelventil in 19Control valve in 19th
- 2121
- VormischraumPremixing room
- 2222
- BrenneraustrittBurner outlet
- 2323
- zusätzliche Brennstoffdüseadditional fuel nozzle
- 2424th
- getrennte Brennstoffleitungseparate fuel line
- 2525th
- Regelventil in 24Control valve in 24
Claims (3)
- Gas-operated premixing burner for the combustion chamber of, for example, a gas turbine in which, within a premixing space (21), the fuel injected by means of a plurality of nozzles (17) is intensively mixed with the combustion air prior to ignition, the nozzles being arranged around a burner axis (10), characterized in that within the premixing space (21) additional fuel nozzles (23) are provided in the region of the burner axis (10), which fuel nozzles can be supplied via a separate fuel conduit (24), with the result that, in order to influence the fuel profile at the outlet from the premixing burner in a specific manner, the fuel concentration in the region of the burner axis is greater than the average fuel concentration in the outlet plane (22) of the premixing burner.
- Premixing burner according to Claim 1, characterized in that the separate fuel conduit (24) is provided with a control valve (25) which can be shut off.
- Premixing burner according to Claim 1, characterized in that, when use is made of a burner of the double-cone type, which comprises two hollow, conical partial bodies (11, 12) which are interleaved and have offset central axes (13, 14), the additional fuel nozzles (23) are arranged in the region of the cone apex.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59209209T DE59209209D1 (en) | 1992-10-16 | 1992-10-16 | Gas powered premix burner |
| EP92117673A EP0592717B1 (en) | 1992-10-16 | 1992-10-16 | Gas-operated premix burner |
| US08/120,086 US5482457A (en) | 1992-10-16 | 1993-09-13 | Gas-operated premixing burner |
| JP25813593A JP3553995B2 (en) | 1992-10-16 | 1993-10-15 | Gas-operated premix burner |
| KR1019930021550A KR940009586A (en) | 1992-10-16 | 1993-10-16 | Gas Operated Premix Burners |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP92117673A EP0592717B1 (en) | 1992-10-16 | 1992-10-16 | Gas-operated premix burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0592717A1 EP0592717A1 (en) | 1994-04-20 |
| EP0592717B1 true EP0592717B1 (en) | 1998-02-25 |
Family
ID=8210136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92117673A Expired - Lifetime EP0592717B1 (en) | 1992-10-16 | 1992-10-16 | Gas-operated premix burner |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5482457A (en) |
| EP (1) | EP0592717B1 (en) |
| JP (1) | JP3553995B2 (en) |
| KR (1) | KR940009586A (en) |
| DE (1) | DE59209209D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8484979B2 (en) | 2007-03-15 | 2013-07-16 | Siemens Aktiengesellschaft | Burner fuel staging |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4426353A1 (en) * | 1994-07-25 | 1996-02-01 | Abb Research Ltd | burner |
| DE4441641A1 (en) * | 1994-11-23 | 1996-05-30 | Abb Management Ag | Combustion chamber with premix burners |
| DE4446842B4 (en) * | 1994-12-27 | 2006-08-10 | Alstom | Method and device for feeding a gaseous fuel into a premix burner |
| DE4446945B4 (en) * | 1994-12-28 | 2005-03-17 | Alstom | Gas powered premix burner |
| DE19507763A1 (en) * | 1995-03-06 | 1996-09-12 | Siemens Ag | Method and device for burning a fuel in a gas turbine |
| ATE244380T1 (en) * | 1997-11-21 | 2003-07-15 | Alstom | BURNER FOR OPERATION OF A HEAT GENERATOR |
| US6176087B1 (en) * | 1997-12-15 | 2001-01-23 | United Technologies Corporation | Bluff body premixing fuel injector and method for premixing fuel and air |
| EP1292795B1 (en) | 2000-06-15 | 2005-05-04 | ALSTOM Technology Ltd | Method for operating a burner with staged premix gas injection |
| DE10029607A1 (en) * | 2000-06-15 | 2001-12-20 | Alstom Power Nv | Method to operate burner; involves operating burner with two groups of fuel outlets to supply different amounts of same fuel, where outlet groups are supplied independently and controlled separately |
| DE10049205A1 (en) * | 2000-10-05 | 2002-05-23 | Alstom Switzerland Ltd | Process for supplying fuel to a premix burner for operating a gas turbine comprises introducing premix gas separately via two axially divided regions along the burner shell |
| DE10051221A1 (en) * | 2000-10-16 | 2002-07-11 | Alstom Switzerland Ltd | Burner with staged fuel injection |
| DE10055408A1 (en) | 2000-11-09 | 2002-05-23 | Alstom Switzerland Ltd | Process for fuel injection into a burner |
| DE10064893A1 (en) * | 2000-12-23 | 2002-11-14 | Alstom Switzerland Ltd | Burner with graduated fuel injection |
| DE10104150A1 (en) | 2001-01-30 | 2002-09-05 | Alstom Switzerland Ltd | Burner system and method for its operation |
| DE10108560A1 (en) | 2001-02-22 | 2002-09-05 | Alstom Switzerland Ltd | Method for operating an annular combustion chamber and an associated annular combustion chamber |
| DE10164099A1 (en) * | 2001-12-24 | 2003-07-03 | Alstom Switzerland Ltd | Burner with staged fuel injection |
| CN101793393B (en) * | 2002-08-09 | 2012-09-05 | 杰富意钢铁株式会社 | Tubular flame burner and combustion control method |
| EP1510755B1 (en) * | 2003-09-01 | 2016-09-28 | General Electric Technology GmbH | Burner with lance and staged fuel supply. |
| DE102004002631A1 (en) * | 2004-01-19 | 2005-08-11 | Alstom Technology Ltd | A method of operating a gas turbine combustor |
| EP1730447A1 (en) * | 2004-03-31 | 2006-12-13 | Alstom Technology Ltd | Burner |
| EP1828684A1 (en) * | 2004-12-23 | 2007-09-05 | Alstom Technology Ltd | Premix burner comprising a mixing section |
| ATE479054T1 (en) * | 2005-03-09 | 2010-09-15 | Alstom Technology Ltd | PREMIX BURNER FOR GENERATING AN IGNITIBLE FUEL-AIR MIXTURE |
| US7402038B2 (en) * | 2005-04-22 | 2008-07-22 | The North American Manufacturing Company, Ltd. | Combustion method and apparatus |
| US7832365B2 (en) * | 2005-09-07 | 2010-11-16 | Fives North American Combustion, Inc. | Submerged combustion vaporizer with low NOx |
| US20080081301A1 (en) * | 2006-10-03 | 2008-04-03 | Hannum Mark C | Low NOx combustion |
| EP2058590B1 (en) * | 2007-11-09 | 2016-03-23 | Alstom Technology Ltd | Method for operating a burner |
| EP2220433B1 (en) * | 2007-11-27 | 2013-09-04 | Alstom Technology Ltd | Method and device for burning hydrogen in a premix burner |
| WO2009068427A1 (en) * | 2007-11-27 | 2009-06-04 | Alstom Technology Ltd | Device and method for operating a gas turbine system using a second, hydrogen-rich fuel |
| EP2837883B1 (en) * | 2013-08-16 | 2018-04-04 | Ansaldo Energia Switzerland AG | Premixed can annular combustor with mixing lobes for the second stage of a sequential gas turbine |
| CN103574606B (en) * | 2013-11-18 | 2016-01-06 | 南通宝聚颜料有限公司 | A kind of combustion of hydrogen device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3180395A (en) * | 1962-12-14 | 1965-04-27 | Zink Co John | Liquid and gaseous fuel burner assembly producing a fan-shaped flame |
| US4100733A (en) * | 1976-10-04 | 1978-07-18 | United Technologies Corporation | Premix combustor |
| DE2950535A1 (en) * | 1979-11-23 | 1981-06-11 | BBC AG Brown, Boveri & Cie., Baden, Aargau | COMBUSTION CHAMBER OF A GAS TURBINE WITH PRE-MIXING / PRE-EVAPORATING ELEMENTS |
| DE3662462D1 (en) * | 1985-07-30 | 1989-04-20 | Bbc Brown Boveri & Cie | Dual combustor |
| CH674561A5 (en) * | 1987-12-21 | 1990-06-15 | Bbc Brown Boveri & Cie | |
| US5193995A (en) * | 1987-12-21 | 1993-03-16 | Asea Brown Boveri Ltd. | Apparatus for premixing-type combustion of liquid fuel |
| WO1990002907A1 (en) * | 1988-09-02 | 1990-03-22 | American Combustion, Inc. | Method and apparatus for generating highly luminous flame |
| CH679692A5 (en) * | 1989-04-24 | 1992-03-31 | Asea Brown Boveri | |
| CH680946A5 (en) * | 1989-12-19 | 1992-12-15 | Asea Brown Boveri | |
| CH682952A5 (en) * | 1991-03-12 | 1993-12-15 | Asea Brown Boveri | Burner for a premixing combustion of a liquid and / or gaseous fuel. |
-
1992
- 1992-10-16 EP EP92117673A patent/EP0592717B1/en not_active Expired - Lifetime
- 1992-10-16 DE DE59209209T patent/DE59209209D1/en not_active Expired - Lifetime
-
1993
- 1993-09-13 US US08/120,086 patent/US5482457A/en not_active Expired - Lifetime
- 1993-10-15 JP JP25813593A patent/JP3553995B2/en not_active Expired - Lifetime
- 1993-10-16 KR KR1019930021550A patent/KR940009586A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8484979B2 (en) | 2007-03-15 | 2013-07-16 | Siemens Aktiengesellschaft | Burner fuel staging |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0592717A1 (en) | 1994-04-20 |
| JP3553995B2 (en) | 2004-08-11 |
| US5482457A (en) | 1996-01-09 |
| KR940009586A (en) | 1994-05-20 |
| JPH06193841A (en) | 1994-07-15 |
| DE59209209D1 (en) | 1998-04-02 |
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