WO1997012180A2 - Process and device for improving the starting characteristics of an oil diffusion burner - Google Patents
Process and device for improving the starting characteristics of an oil diffusion burner Download PDFInfo
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- WO1997012180A2 WO1997012180A2 PCT/DE1996/001780 DE9601780W WO9712180A2 WO 1997012180 A2 WO1997012180 A2 WO 1997012180A2 DE 9601780 W DE9601780 W DE 9601780W WO 9712180 A2 WO9712180 A2 WO 9712180A2
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- Prior art keywords
- fuel gas
- oil
- burner
- nozzle
- supplied
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Classifications
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- 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
- F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
- F23D11/26—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed
- F23D11/28—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed with flow-back of fuel at the burner, e.g. using by-pass
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- 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
- F23D11/42—Starting devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
- F23D17/002—Burners for combustion simultaneously or alternately 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
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/002—Supplying water
Definitions
- the present invention relates to a method for improving the starting behavior of an oldiffusion burner with at least one atomizing nozzle for fine atomization of oil in a combustion chamber.
- the central part namely the lance-like atomizer nozzle with its supply systems is also described in WO 90/12987. From this document it is also known that such diffusion burner nozzles can be equipped with an additional supply system for an inert substance, in particular for the supply of water. This water serves to lower the flame temperature and thus the nitrogen oxide production during load operation. However, this system is irrelevant when starting the oil burner and is therefore not required.
- US Pat. No. 5,408,830 describes a fuel nozzle for reducing combustion instabilities in gas turbine systems with low nitrogen oxide emissions.
- a fuel nozzle for reducing combustion instabilities in gas turbine systems with low nitrogen oxide emissions.
- a plurality of such fuel nozzles are used in the combustion chamber to supply
- Each fuel nozzle consists of a plurality of concentrically enclosing tubes, so that annular gaps are formed between adjacent tubes.
- the tubes open into a nozzle head which has bores to the annular gaps or the innermost tube, which run at an angle of 45 ° with respect to the tube axis of the innermost tube.
- the fluid fuel feasible. Air for atomizing the fluid fuel is guided in the annular gap that follows next to the outside. During the start phase of the combustion, gaseous fuel for diffusion combustion is carried in an annular gap located further out.
- gaseous fuel is supplied for a premix combustion operation and upstream of the nozzle head is fed to the combustion air by a swirl generator downstream of a swirl generator mixes. Any fuel is ignited by a single spark plug located downstream of all fuel nozzles.
- the object of the present invention is to improve the starting behavior of an oldiffusion burner in order to achieve properties which are similar to those of gas burners.
- the improvement should be able to be retrofitted with the smallest possible design changes to existing systems.
- the method according to the invention for improving the starting behavior of an oldiffusion burner with at least one atomizing nozzle for the fine atomization of oil in a combustion chamber consists in that shortly before and during the start of the
- Oil supply a fuel gas through at least one opening near the atomizer nozzle and ignited there, whereby a support flame is generated during the start phase of the diffusion burner.
- a support flame is particularly well suited to uniformly igniting the oil droplets, which are atomized finely enough, when the oil supply is started, and directly a stable one Generate flame on the diffusion burner.
- the support flame is located close to the atomizer nozzle and can ignite the escaping oil mist directly.
- the invention is particularly suitable for swirl pressure oil atomizers, ie. H. for burners to which the combustion air is supplied by an air supply system that generates a swirl.
- air supply systems which are usually formed by a swirl blading located near the burner nozzle, are described in the cited prior art.
- the invention is preferably suitable for known return-controlled oil diffusion burners.
- the fuel gas supplied can be, for example, a high-calorific gas, in particular propane, butane or natural gas, depending on the availability on site.
- the fuel gas is supplied through a plurality of openings, preferably nozzle-shaped, surrounding the atomizing nozzle, in particular if these concentrically surround the atomizing nozzle. Then there is a particularly favorably shaped support flame which can ignite the completely injected oil immediately.
- a preferred procedure for igniting the oldiffusion burner is that an ignition flame is ignited first, which then ignites the support flame fed by the fuel gas. As soon as the support flame burns, the pilot flame can be switched off. After a short start-up phase, the support flame can also be switched off as soon as the oil diffusion burner burns stably.
- the drawing shows a partially schematic illustration of a longitudinal section through the central parts of a return-controlled pressure oil atomizer.
- the oil diffusion burner 1 which is shown in the drawing without the surrounding air supply system and the combustion chamber, contains as its core a lance-shaped supply system made up of several concentrically nested channels.
- a lance-shaped supply system made up of several concentrically nested channels.
- pressure oil reaches an annular channel 6 and from there to the atomizing nozzle 2.
- Excess oil flows through the central oil return channel 7 to the oil return 5, in which control elements known per se are arranged.
- an inert substance in particular water
- the nozzle-shaped openings 3 preferably surround the atomizing nozzle 2 concentrically.
- the openings 3 and the inert material feed 8 can be dimensioned in such a way that with conventional ones available pressures, both suitable amounts of water during normal operation and suitable amounts of fuel gas during the start-up phase.
- the supply line 8 can optionally be connected via valves 12, 13 to a source 11 for inert substance, in particular water, and to a fuel gas source 10.
- propane gas can be considered as the fuel gas, but natural gas or other, in particular high-calorie, fuel gases can also be used.
- Suitable fuel gas sources are usually available anyway for the pilot burner 14 shown schematically in the vicinity of the openings 3, so that the overall effort for implementing the present invention is very low. A considerable improvement in the starting behavior and a reduction in pollutants at the start are achieved.
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- 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)
Abstract
Description
Beschreibungdescription
Verfahren und Vorrichtung zur Verbesserung des Startverhal¬ tens eines OldiffusionsbrennersMethod and device for improving the starting behavior of an oldiffusion burner
Die vorliegende Erfindung betrifft ein Verfahren zur Verbes¬ serung des Startverhaltens eines Oldiffusionsbrenners mit mindestens einer Zerstäuberdüse zur feinen Zerstäubung von Öl in einer Brennkammer.The present invention relates to a method for improving the starting behavior of an oldiffusion burner with at least one atomizing nozzle for fine atomization of oil in a combustion chamber.
Anders als bei Gasbrennern ist das Zünden von Öldiffusionε- brennern in einer Brennkammer mit Schwierigkeiten verbunden und führt zu unerwünschten Nebeneffekten. Häufig brennt vor dem Beginn der Olzufuhr eine Zündflamme in dem Bereich, in den das Öl eingedüst werden soll. Werden nun Verbrennungsluft und Olzufuhr angeschaltet, so kann trotz einer feinen Zer¬ stäubung des Öls nicht sofort eine gleichmäßige, brennernahe und stabile Verbrennung im gesamten Eindüsungsbereich erfol- gen. So kann es zu einem deflagrativen Zünden des Öles kom¬ men, was dann mit einer unvollständen Verbrennung und starken Rußemission verbunden ist, und es gelangt teilweise unver¬ branntes Öl, insbesondere Heizöl, an die Wände der Brennkam¬ mer und brennt dort. Es kann sich ein von den Brennern losge- löstes Flammenmeer in der Brennkammer bilden, so daß erst nach längerer Zeit stabile, an den Flammenhaltern der Brenner brennende Flammen erreicht werden.In contrast to gas burners, igniting oil diffusion burners in a combustion chamber is difficult and leads to undesirable side effects. Often, before the oil supply begins, a pilot flame burns in the area into which the oil is to be injected. If combustion air and oil supply are now switched on, even though the oil is finely atomized, uniform, near-burner and stable combustion cannot take place in the entire injection area. This can result in deflagrative ignition of the oil, which then results in a incomplete combustion and strong soot emission is connected, and partially unburned oil, in particular heating oil, reaches the walls of the combustion chamber and burns there. A sea of flames detached from the burners can form in the combustion chamber, so that stable flames burning on the flame holders of the burners can only be reached after a long time.
Aus dem Stand der Technik sind verschiedene Öldiffusionsbren- ner bekannt, bei denen dieses Problem auftreten kann. Bekannt sind insbesondere auch aus der EP 0 193 838 Bl sogenannte Hy¬ bridbrenner, welche wahlweise als Vormischbrenner für Erdgas oder Öl eingesetzt werden können. Für solche Brenner ist es auch bekannt, diese nicht nur mit einem zentralen Diffusi- onsbrenner zur Erzeugung einer Pilotflamme, sondern mit einem großen, beispielsweise rücklaufgeregelten Dralldruckölzer- stäuber zur Erzeugung einer ölbetriebenen Hauptflamme einzu- setzen, z. B. aus der Broschüre "Schadstoffarme Verbrennung in Gasturbinen" der Siemens AG, 11/1988, 132041 WS 011883. Auch in der DE 36 06 625 AI sind verschiedene Brenneranord¬ nungen, darunter auch Dralldruckölzerstäuber beschrieben.Various oil diffusion burners in which this problem can occur are known from the prior art. So-called hybrid burners are also known in particular from EP 0 193 838 B1, which can optionally be used as premix burners for natural gas or oil. For such burners, it is also known to use them not only with a central diffusion burner to produce a pilot flame, but also with a large, for example, return-controlled swirl pressure oil atomizer to produce an oil-operated main flame. put, e.g. B. from the brochure "Low-Emission Combustion in Gas Turbines" from Siemens AG, 11/1988, 132041 WS 011883. Also in DE 36 06 625 AI various burner arrangements, including swirl pressure oil atomizers, are described.
Der zentrale Teil, nämlich die lanzenartige Zerstäuberdüse mit ihren ZuführSystemen ist auch in der WO 90/12987 be¬ schrieben. Aus dieser Schrift ist auch bekannt, daß solche Diffusionsbrennerdüsen mit einem zusätzlichen Zuführsystem für einen Inertstoff ausgestattet sein können, insbesondere für die Zuführung von Wasser. Dieses Wasser dient dazu, beim Lastbetrieb die Flammentemperatur und damit die Stickoxidpro¬ duktion zu senken. Beim Starten des Ölbrenners spielt dieses System jedoch keine Rolle und wird daher nicht benötigt.The central part, namely the lance-like atomizer nozzle with its supply systems is also described in WO 90/12987. From this document it is also known that such diffusion burner nozzles can be equipped with an additional supply system for an inert substance, in particular for the supply of water. This water serves to lower the flame temperature and thus the nitrogen oxide production during load operation. However, this system is irrelevant when starting the oil burner and is therefore not required.
In dieser Schrift ist auch die Rücklaufregelung eines Oldif¬ fusionsbrenners beschrieben, die im wesentlichen darin be¬ steht, daß der Zerstäuberdüse wesentlich mehr Öl zugeführt wird als tatsächlich in die Brennkammer eingespritzt werden soll. Das überschüssige Öl wird zurückgeführt, wobei auf diese Weise der Druck an der Zerstäuberdüse mit einfachen re¬ gelungstechnischen Mitteln durch geeignete Drosselung der Strömung im Rücklauf geregelt bzw. konstant gehalten werden kann.In this document the return flow control of an old fusion burner is also described, which essentially consists in that considerably more oil is supplied to the atomizing nozzle than is actually to be injected into the combustion chamber. The excess oil is returned, and in this way the pressure at the atomizer nozzle can be regulated or kept constant by simple control means by suitable throttling of the flow in the return.
In der US-PS 5,408,830 ist eine Brennnstoffdüse zur Reduzie¬ rung von Verbrennungsinstabilitäten bei Gasturbinenanlagen mit geringem Stickoxid-Ausstoß beschrieben. In einer Gastur¬ binenanlage mit einer Brennkammer werden eine Mehrzahl sol- eher Brennstoffdüsen in der Brennkammer zur Zuführung vonUS Pat. No. 5,408,830 describes a fuel nozzle for reducing combustion instabilities in gas turbine systems with low nitrogen oxide emissions. In a gas turbine system with a combustion chamber, a plurality of such fuel nozzles are used in the combustion chamber to supply
Brennstoff verwendet. Jede Brennstoffdüse besteht aus einer Mehrzahl konzentrisch einander umschließender Rohre, so daß zwischen benachbarten Rohren jeweils Ringspalte gebildet wer¬ den. Die Rohre münden in einen Düsenkopf, welcher Bohrungen zu den Ringspalten bzw. dem innersten Rohr aufweist, die un¬ ter einem Winkel von 45° gegenüber der Rohrachse des inner¬ sten Rohres verlaufen. In dem innersten Rohr ist bei einem Betrieb der Gasturbinenanlage mit einem Fluidbrennstoff der Fluidbrennstoff führbar. In dem nach außen hin nächstfolgen¬ den Ringspalt wird Luft zur Zerstäubung des Fluidbrennstoffes geführt . Während der Startphase der Verbrennung wird in einem weiter außenliegenden Ringspalt gasförmiger Brennstoff für eine Diffusionsverbrennung geführt. In dem am weitesten außen liegenden Ringspalt, welcher durch keine Bohrung mit dem Dü¬ senkopf verbunden ist, wird gasförmigr Brennstoff für einen Vormisch-Verbrennungsbetrieb zugeführt und stromauf des Dύ- senkopfes durch radial nach außen weisende Brennstoffinjekto- ren stromab eines Drallerzeugers der Verbrennungsluft beige¬ mischt. Jedweder Brennstoff wird durch eine einzige stromab sämtlicher Brennstoffdüsen angeordneten Zündkerze gezündet.Fuel used. Each fuel nozzle consists of a plurality of concentrically enclosing tubes, so that annular gaps are formed between adjacent tubes. The tubes open into a nozzle head which has bores to the annular gaps or the innermost tube, which run at an angle of 45 ° with respect to the tube axis of the innermost tube. In the innermost tube is one Operation of the gas turbine system with a fluid fuel, the fluid fuel feasible. Air for atomizing the fluid fuel is guided in the annular gap that follows next to the outside. During the start phase of the combustion, gaseous fuel for diffusion combustion is carried in an annular gap located further out. In the outermost annular gap, which is not connected to the nozzle head by a bore, gaseous fuel is supplied for a premix combustion operation and upstream of the nozzle head is fed to the combustion air by a swirl generator downstream of a swirl generator mixes. Any fuel is ignited by a single spark plug located downstream of all fuel nozzles.
Aufgabe der vorliegenden Erfindung ist es, daß Startverhalten eines Oldiffusionsbrenners zu verbessern, um ähnlich gute Ei¬ genschaften wie bei Gasbrennern zu erreichen. Insbesondere soll die Verbesserung mit möglichst geringen konstruktiven Änderungen an vorhandenen Systemen nachgerüstet werden kön- nen.The object of the present invention is to improve the starting behavior of an oldiffusion burner in order to achieve properties which are similar to those of gas burners. In particular, the improvement should be able to be retrofitted with the smallest possible design changes to existing systems.
Diese Aufgabe wird durch ein Verfahren gemäß dem Anspruch 1 bzw. durch eine Vorrichtung gemäß Anspruch 11 oder 12 gelöst. Vorteilhafte Ausgestaltungen sind in den jeweils abhängigen Ansprüchen beschrieben.This object is achieved by a method according to claim 1 or by a device according to claim 11 or 12. Advantageous embodiments are described in the respective dependent claims.
Das erfindungsgemäße Verfahren zur Verbesserung des Startver¬ haltens eines Oldiffusionsbrenners mit mindestens einer Zer¬ stäuberdüse zur feinen Zerstäubung von Öl in einer Brennkam- mer besteht darin, daß kurz vor und während des Beginns derThe method according to the invention for improving the starting behavior of an oldiffusion burner with at least one atomizing nozzle for the fine atomization of oil in a combustion chamber consists in that shortly before and during the start of the
Olzufuhr ein Brenngas durch mindestens eine Öffnung nahe der Zerstäuberdüse zugeführt und dort entzündet wird, wodurch eine Stützflamme während der Startphase des Diffusionsbren¬ ners erzeugt wird. Bei Versuchen hat sich herausgestellt, daß eine solche Stützflamme besonders gut geeignet ist, die an sich fein genug zerstäubten Öltröpfchen beim Starten der Ol¬ zufuhr gleichmäßig zu entzünden und direkt eine stabile Flamme am Diffusionsbrenner zu erzeugen. Anders als bei den üblicherweise zum Zünden verwendeten Zündbrennern befindet sich die Stützflamme nahe an der Zerstäuberdüse und kann den austretenden Ölnebel direkt entzünden.Oil supply a fuel gas through at least one opening near the atomizer nozzle and ignited there, whereby a support flame is generated during the start phase of the diffusion burner. Experiments have shown that such a support flame is particularly well suited to uniformly igniting the oil droplets, which are atomized finely enough, when the oil supply is started, and directly a stable one Generate flame on the diffusion burner. Unlike the pilot burners commonly used for ignition, the support flame is located close to the atomizer nozzle and can ignite the escaping oil mist directly.
Besonders geeignet ist die Erfindung für Dralldruckölzerstäu- ber, d. h. für Brenner, denen die Verbrennungsluft von einem Luftzufuhrsystem zugeführt wird, welches einen Drall erzeugt. Solche Luftzufuhrsysteme, die üblicherweise durch eine nahe der Brennerdüse liegende Drallbeschaufelung gebildet werden, sind im zitierten Stand der Technik beschrieben. Die Erfin¬ dung ist bevorzugt geeignet für an sich bekannte rücklaufge¬ regelte Öldiffusionsbrenner.The invention is particularly suitable for swirl pressure oil atomizers, ie. H. for burners to which the combustion air is supplied by an air supply system that generates a swirl. Such air supply systems, which are usually formed by a swirl blading located near the burner nozzle, are described in the cited prior art. The invention is preferably suitable for known return-controlled oil diffusion burners.
Das zugeführte Brenngas kann beispielsweise ein hochkaloriges Brengas, insbesondere Propan, Butan oder Erdgas sein, je nach der Verfügbarkeit vor Ort.The fuel gas supplied can be, for example, a high-calorific gas, in particular propane, butane or natural gas, depending on the availability on site.
Besonders günstig ist es, wenn das Brenngas durch mehrere die Zerstäuberdüse umgebende, vorzugsweise düsenförmige, Öffnun¬ gen zugeführt wird, insbesondere wenn diese die Zerstäuberdü¬ se konzentrisch umgeben. Dann besteht eine besonders günstig geformte Stützflamme, die das eingedüste Öl sofort vollstän¬ dig entzünden kann.It is particularly favorable if the fuel gas is supplied through a plurality of openings, preferably nozzle-shaped, surrounding the atomizing nozzle, in particular if these concentrically surround the atomizing nozzle. Then there is a particularly favorably shaped support flame which can ignite the completely injected oil immediately.
Es hat sich als realisierbar und besonders vorteilhaft erwie¬ sen, ein einziges Zuführsystem für Brenngas zur Erzeugung ei¬ ner Stützflamme und für Wasser zur Reduzierung der Stickoxid¬ emission vorzusehen. Die für die Stützflamme benötigte ge- ringe Menge an Brenngas von z. B. 1 bis 10 g/s, vorzugsweise 3 bis 5 g/s läßt sich gerade durch Düsen zuführen, die sich auch für die Eindüsung von ausreichenden Mengen Wasser wäh¬ rend des Betriebes eignen. Es muß daher lediglich eine Um¬ schaltung von Wasserzufuhr auf Brenngaszufuhr am Einlaß die- ses Zuführsystems vorgesehen werden, um beide Funktionen mit geringem Aufwand zu erreichen. Bei vorhandenen Brennern mit Zuführsystem für Wasser bedeutet dies, daß nur eine Zu- satzausrüεtung am Einlaß für Wasser erforderlich ist. Diese kann aus einem Drei-Wege-Ventil oder getrennten Ventilen be¬ stehen, die mit einer Wasser- bzw. Brenngasquelle verbunden sind.It has proven to be feasible and particularly advantageous to provide a single supply system for fuel gas for generating a supporting flame and for water for reducing the nitrogen oxide emission. The small amount of fuel gas required for the support flame of e.g. B. 1 to 10 g / s, preferably 3 to 5 g / s can be fed straight through nozzles which are also suitable for injecting sufficient amounts of water during operation. It is therefore only necessary to switch over from water supply to fuel gas supply at the inlet of this supply system in order to achieve both functions with little effort. In existing burners with a water supply system, this means that only one supply kit equipment at the inlet for water is required. This can consist of a three-way valve or separate valves which are connected to a water or fuel gas source.
Ein bevorzugtes Vorgehen zum Zünden des Oldiffusionsbrenners besteht darin, daß zunächst eine Zündflamme gezündet wird, die dann die von dem Brenngas gespeiste Stützflamme zündet. Sobald die Stützflamme brennt, kann die Zündflamme abgeschal- tet werden. Nach einer kurzen Startphase kann dann auch die Stützflamme abgeschaltet werden, sobald der Öldiffusionsbren- ner stabil brennt.A preferred procedure for igniting the oldiffusion burner is that an ignition flame is ignited first, which then ignites the support flame fed by the fuel gas. As soon as the support flame burns, the pilot flame can be switched off. After a short start-up phase, the support flame can also be switched off as soon as the oil diffusion burner burns stably.
Weitere Einzelheiten und Vorteile der Erfindung werden im folgenden anhand des in der Zeichnung dargestellten Ausfüh¬ rungsbeispiels näher beschrieben.Further details and advantages of the invention are described in more detail below with reference to the exemplary embodiment shown in the drawing.
Die Zeichnung zeigt in teilweise schematischer Darstellung einen Längsschnitt durch die zentralen Teile eines rücklauf- geregelten Druckδlzerstäubers.The drawing shows a partially schematic illustration of a longitudinal section through the central parts of a return-controlled pressure oil atomizer.
Der Öldiffusionsbrenner 1, der in der Zeichnung ohne das ihn umgebende Luftzuführungssystem und die Brennkammer darge¬ stellt ist, enthält als Kernstück ein lanzenförmiges Zuführ- System aus mehreren konzentrisch ineinanderliegenden Kanälen. Durch eine ÖlZuführung 4 gelangt Drucköl in einen Ringkanal 6 und von dort zu der Zerstäuberdüse 2. Überschüssiges Öl fließt durch den zentralen Ölrücklaufkanal 7 zur Ölrückfüh- rung 5, in der an sich bekannte Regelorgane angeordnet sind. Bei dieser Brenneranordnung kann ein Inertεtoff, insbesondere Wasser, durch eine InertstoffZuführung 8 über einen äußeren Ringkanal oder eine getrennte Leitung dem Brenner 1 zugeführt werden, so daß der Inertstoff durch düsenförmige Öffnungen 3 in den Bereich der Diffusionsflamme austreten kann. Die dü- senförmigen Öffnungen 3 umgeben die Zerstäuberdüse 2 vorzugs¬ weise konzentrisch. Die Öffnungen 3 und die InertstoffZufüh¬ rung 8 lassen sich so dimensionieren, daß sich mit üblichen zur Verfügung stehenden Drücken, sowohl geeignete Mengen an Wasser während des Normalbetriebes, als auch geeignete Mengen an Brenngas während der Startphase zuführen lassen. Die Zu¬ führung 8 ist über Ventile 12, 13 mit einer Quelle 11 für Inertstoff, insbesondere Wasser, und mit einer Brenngasquelle 10 wahlweise verbindbar. Als Brenngas kommt beispielsweise Propangas in Betracht, jedoch können insbesondere auch Erdgas oder andere, insbesondere hochkalorige Brenngase eingesetzt werden. Geeignete Brenngasquellen stehen üblicherweise ohne- hin für den schematisch in der Umgebung der Öffnungen 3 dar¬ gestellten Zündbrenner 14 zur Verfügung, so daß insgesamt der Aufwand für die Ausführung der vorliegenden Erfindung sehr gering ist. Es wird eine erhebliche Verbesserung des Start¬ verhaltens und eine Verringerung von Schadstoffen beim Start erreicht.The oil diffusion burner 1, which is shown in the drawing without the surrounding air supply system and the combustion chamber, contains as its core a lance-shaped supply system made up of several concentrically nested channels. Through an oil supply 4, pressure oil reaches an annular channel 6 and from there to the atomizing nozzle 2. Excess oil flows through the central oil return channel 7 to the oil return 5, in which control elements known per se are arranged. In this burner arrangement, an inert substance, in particular water, can be fed to the burner 1 through an inert substance feed 8 via an outer ring channel or a separate line, so that the inert substance can escape through nozzle-shaped openings 3 into the area of the diffusion flame. The nozzle-shaped openings 3 preferably surround the atomizing nozzle 2 concentrically. The openings 3 and the inert material feed 8 can be dimensioned in such a way that with conventional ones available pressures, both suitable amounts of water during normal operation and suitable amounts of fuel gas during the start-up phase. The supply line 8 can optionally be connected via valves 12, 13 to a source 11 for inert substance, in particular water, and to a fuel gas source 10. For example, propane gas can be considered as the fuel gas, but natural gas or other, in particular high-calorie, fuel gases can also be used. Suitable fuel gas sources are usually available anyway for the pilot burner 14 shown schematically in the vicinity of the openings 3, so that the overall effort for implementing the present invention is very low. A considerable improvement in the starting behavior and a reduction in pollutants at the start are achieved.
Die vorliegende Erfindung wurde zwar anhand eines rücklaufge¬ regelten Dralldruckölzerstäubers beschrieben, ist jedoch nicht auf diesen Anwendungsfall beschränkt. Die Anwendung ist für jede Art von Diffusionsbrennern möglich. Although the present invention has been described with reference to a return-regulated swirl pressure atomizer, it is not restricted to this application. It can be used for any type of diffusion burner.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19536210.1 | 1995-09-28 | ||
| DE19536210 | 1995-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997012180A2 true WO1997012180A2 (en) | 1997-04-03 |
| WO1997012180A3 WO1997012180A3 (en) | 1997-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1996/001780 Ceased WO1997012180A2 (en) | 1995-09-28 | 1996-09-19 | Process and device for improving the starting characteristics of an oil diffusion burner |
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| WO (1) | WO1997012180A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1031789A1 (en) * | 1999-02-23 | 2000-08-30 | Siemens Aktiengesellschaft | Backflow oil diffusion burner and NOx reduction process for such a burner |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1267897A (en) * | 1960-06-14 | 1961-07-28 | Fourment & Laduree | Universal burner |
| US4098255A (en) * | 1976-09-07 | 1978-07-04 | Thermo Electron Corporation | Dual fuel radiant tube burner |
| US4197076A (en) * | 1978-02-13 | 1980-04-08 | Pacific Turbo Flame Ltd. | Forced draft burner |
| US4600151A (en) * | 1982-11-23 | 1986-07-15 | Ex-Cell-O Corporation | Fuel injector assembly with water or auxiliary fuel capability |
| IT1263683B (en) * | 1992-08-21 | 1996-08-27 | Westinghouse Electric Corp | NOZZLE COMPLEX FOR FUEL FOR A GAS TURBINE |
-
1996
- 1996-09-19 WO PCT/DE1996/001780 patent/WO1997012180A2/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1031789A1 (en) * | 1999-02-23 | 2000-08-30 | Siemens Aktiengesellschaft | Backflow oil diffusion burner and NOx reduction process for such a burner |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1997012180A3 (en) | 1997-05-09 |
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