EP0427033A2 - Steam generator - Google Patents

Steam generator Download PDF

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Publication number
EP0427033A2
EP0427033A2 EP90120170A EP90120170A EP0427033A2 EP 0427033 A2 EP0427033 A2 EP 0427033A2 EP 90120170 A EP90120170 A EP 90120170A EP 90120170 A EP90120170 A EP 90120170A EP 0427033 A2 EP0427033 A2 EP 0427033A2
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EP
European Patent Office
Prior art keywords
steam generator
generator according
flow
injection
ignition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90120170A
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German (de)
French (fr)
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EP0427033B1 (en
EP0427033A3 (en
Inventor
Hans Prof.Dr. Sternfeld
Karlheinz Prof.Dr. Wolfmüller
Alfred Brunn
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Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsche Forschungs und Versuchsanstalt fuer Luft und Raumfahrt eV DFVLR
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Publication of EP0427033A3 publication Critical patent/EP0427033A3/en
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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 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/003—Methods of steam generation characterised by form of heating method using combustion of hydrogen with oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/22—Methods of steam generation characterised by form of heating method using combustion under pressure substantially exceeding atmospheric pressure
    • F22B1/26—Steam boilers of submerged-flame type, i.e. the flame being surrounded by, or impinging on, the water to be vaporised, e.g. water in sprays
    • 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
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00012—Liquid or gas fuel burners with flames spread over a flat surface, either premix or non-premix type, e.g. "Flächenbrenner"

Definitions

  • the invention relates to a steam generator, in particular a hydrogen / oxygen steam generator, with a blowing head, through which an oxidizer and a fuel are blown into a combustion chamber adjoining the blowing head, and with injection devices for water opening into the combustion chamber.
  • the invention is therefore based on the object of creating a steam generator of the generic type in which optimum combustion conditions are created in the combustion chamber.
  • the injection head has a plurality of injection elements which form the Blow the oxidizer and the fuel together into the combustion chamber and which lead one of the two into an inner cylinder flow and the other into an annular flow surrounding the inner cylinder flow.
  • the advantage of the solution according to the invention is that a reliable and, above all, stoichiometric combustion of the two is possible as a result of this type of injection of the oxidizer and the fuel, which is an imperative especially when using oxygen as the oxidizer and hydrogen as the fuel.
  • a solution is particularly expedient in which the ring flow and the cylinder flow are blown directly into the combustion chamber by the injection element.
  • the ring flow and the cylinder flow are formed in the injection element with flow directions running parallel to one another and are blown into the combustion chamber.
  • the oxidizer is guided in the inner cylinder flow and the fuel in the outer ring flow, so that the fuel flow surrounds the flow of the oxidizer.
  • the oxidizer is preferably oxygen and the fuel is hydrogen, both being supplied in stoichiometrically maintained mass flow ratios.
  • the injection elements are arranged in an inner region of a base plate of the injection head, which has an edge region which surrounds the inner region and is free of injection elements, this edge region preferably extending as far as a wall surrounding the combustion chamber . Providing this edge area free of blowing elements results in better energy conversion downstream of the blowing elements and a lower thermal load on the combustion chamber wall.
  • the base plate is circular. It is therefore also expedient if the inner region is circular and the edge region represents an annular region surrounding the inner region.
  • the cross-sectional area of the cylinder flow is larger than that Cross-sectional area of the ring flow is kept, in particular to achieve good mixing between the fuel and the oxidizer.
  • the length of the inner tube of the injection element forming the cylinder flow is at least three times its diameter.
  • a particularly preferred exemplary embodiment provides that an orifice opening of an ignition chamber or orifice openings of a plurality of ignition chambers are arranged in the edge region of the base plate. This ensures that the ignition chambers are outside the area in which the blowing elements intended for operation are arranged and thus the blowing elements can be optimally arranged regardless of the ignition chambers.
  • a plurality of ignition chambers are preferably provided.
  • the ignition chamber is preferably designed such that the oxidizer supplied in an inner cylinder flow and the fuel guided in an annular flow surrounding the inner cylinder flow are completely mixed before they emerge from the base plate in an ignition chamber.
  • the ignition chamber is advantageously arranged in such a way that it connects to an inner cylinder tube which generates the inner cylinder flow.
  • the ignition chamber is expediently arranged in such a way that it is bounded by the continuation of the outer surface delimiting the annular flow.
  • an ignition element is preferably provided in the ignition chamber, the ignition element in particular being arranged directly in front of the mouth opening.
  • An exemplary embodiment of a steam generator according to the invention shown in FIG. 1, comprises an injection head 10, to which a combustion chamber 12 adjoins, which is surrounded by a combustion chamber housing 14.
  • a combustion chamber housing In this combustion chamber housing at least one or more injection rings 16 are arranged at a distance from the injection head 10, with which water is injected into the combustion chamber, so that a steam flow 18 is formed at an end opposite the injection head 10, which flows through an outlet opening 20 from the Steam generator exits.
  • the embodiment of the invention is preferably operated as a hydrogen / oxygen steam generator, in which an oxygen stream GO2 and a hydrogen stream GH2 are supplied to the injection head 10 in stoichiometric ratios, this injection head 10 then blowing the two streams into the combustion chamber 12.
  • the injection head which closes the combustion chamber 12 and is designated as a whole by 10, forms a base plate 22 which bears with an outer support edge 24 on an end flange 26 of the combustion chamber housing 14 and extends in a direction perpendicular to a longitudinal axis 28 of the combustion chamber housing Level extends.
  • the base plate 22 is provided with a plurality of injection elements, designated as a whole by 30, which are aligned with a longitudinal axis 32 parallel to the longitudinal axis 28 of the combustion chamber housing.
  • the blowing elements 30 are preferably arranged in a regular pattern in the inner region I and have essentially constant distances from one another.
  • Each of these injection elements 30 comprises a bore 34, which extends from a front side 36 of the base plate 22 facing the combustion chamber 12 through the base plate 22 in the direction away from the combustion chamber 12 to a hydrogen distribution space 38, and an inner tube 50 described below.
  • the hydrogen distribution space 38 is formed by a space between the base plate 22 and a parallel to this on the opposite side of the combustion chamber and at a distance from this arranged intermediate base 40, the supply of the hydrogen mass flow GH2 preferably in an outer region of the hydrogen distribution space 38, in particular via a radial Direction of the longitudinal axis 28 extending hydrogen supply line 42 takes place, which opens into the hydrogen distribution space 38.
  • An oxygen distribution space 44 is provided on the side of the intermediate floor 40 opposite the hydrogen distribution space 38, which is formed on the one hand by the intermediate floor 40 and on the other hand by a rear cover 46 of the injection head 10.
  • An oxygen feed line 48 opens into this oxygen distribution space 44.
  • the injection elements 30 also include the inner tube 50, which passes through the intermediate floor 40 and extends from the oxygen distribution space 44 in the direction of the combustion chamber 12 and opens into the bore 34 with a front end 52, the front end 52 is at a distance a behind the front side 36 of the base plate 22.
  • the inner tube 50 is aligned coaxially to the longitudinal axis of the respective blowing element 30 and has an outer diameter which is smaller than an inner diameter of the bore 34, so that, as shown in FIG. 3, an annular gap 54 between the inner tube 50 and the bore 34 remains.
  • annular flow 58 of hydrogen gas flows in the annular gap 54 between the inner tube 50 and the bore 34, which flows around the cylinder flow 56 to the front End 52 of the inner tube 50 runs separately, so that in the blowing element 30th can mix both flows only from the front end 52 of the inner tube.
  • the front end 52 is arranged at a distance a from the front side 36 of the base plate 22, mixing of the ring flow 58 with the cylinder flow 56 begins to a small extent even before the front side of the base plate 22 but then settles into the combustion chamber 12 to an increased extent continues and then takes place completely in this.
  • the cross-sectional area FZ provided for the cylinder flow is larger than the cross-sectional area FR provided for the ring flow, with the additional requirement that the oxygen and hydrogen are blown in with one another in stoichiometric ratios.
  • the length LI of the inner tube 50 is greater than three times the diameter of the inner tube.
  • the inner region I of the base plate 22, which is provided with the blowing elements 30, is additionally surrounded by an edge region R, which is the inner region I encloses an annular shape and extends up to an inner wall surface 60 of the combustion chamber housing 14. According to the invention, this edge region R is not provided with blowing elements 30.
  • ignition chambers 62 are preferably provided in the edge region R, which extend in particular in the opposite direction to the combustion chamber 12 from the base plate 22 and open with their front opening 64 in the front 36 of the base plate 22.
  • the ignition chambers 62 comprise an outer tube 66 forming an outer wall thereof and a cylindrical tube 68 arranged coaxially in this outer tube 66, which forms an annular space 70 between the outer tube 66 between an inner wall of the outer tube 66 and its own outer wall.
  • a rear end of the cylinder tube 68 is connected to an oxygen supply line 72, while a rear end of the annular space 70 is connected to a hydrogen supply line 74, so that a cylinder flow of oxygen is also surrounded by a ring flow of hydrogen.
  • the cylinder tube 68 preferably ends at a distance Z in front of the orifice 64 so that the ring flow of the hydrogen can completely mix with the cylinder flow of the oxygen in the ignition chamber 62.
  • An electrical igniter 76 is preferably provided between the end of the cylinder tube 68 and the orifice opening 64, which ignites the ring flow of hydrogen mixed with the cylinder flow of oxygen in front of the orifice opening 64, so that a burning jet 78 emerges from the orifice opening 64 in the base plate 22 emerges from hydrogen and oxygen, which is then able to ignite the hydrogen / oxygen flows emerging from the base plate 22 in the inner region I.
  • an ignition space 80 is preferably formed between the front end of the cylinder tube 68 and the mouth opening 64, which has the length Z and extends between the front end of the cylinder tube 68 and the mouth opening 64.
  • the ignition space is preferably delimited by an inner circumferential surface 82 of the cladding tube 66, which likewise contributes to the formation of the ring flow in the region between the cladding tube 66 and the cylinder tube 68 and continues up to the mouth opening 64.
  • An ignition head 84 of the ignition element 76 expediently protrudes beyond this inner lateral surface and is arranged in a region where the oxidizer is completely mixed with the fuel, preferably immediately in front of the opening 64.
  • a spark plug or a glow plug is preferably provided as the ignition element.
  • the area FI of the inner region is preferably selected so that it is less than or equal to 0.6 times the area FI + FRa, i.e. is the sum of the area of the inner area FI and the area of the edge area FRa.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

In order to produce a steam generator with an injection head, through which an oxidant and a fuel are blown into a combustion chamber adjoining the injection head, and with injection devices for water which open into the combustion chamber, in which generator optimum combustion conditions are created in the combustion chamber, it is proposed that the injection head has a number of injection elements which inject the oxidant and the fuel together into the combustion chamber and which conduct one of the two in an inner cylindrical flow and the other in a ring flow surrounding the inner cylindrical flow. …<IMAGE>…

Description

Die Erfindung betrifft einen Dampferzeuger, insbesondere einen Wasserstoff/Sauerstoffdampferzeuger, mit einem Ein­blaskopf, durch welchen ein Oxidator und ein Brennstoff in eine sich an den Einblaskopf anschließende Brennkammer eingeblasen werden und mit in die Brennkammer mündenden Einspritzvorrichtungen für Wasser.The invention relates to a steam generator, in particular a hydrogen / oxygen steam generator, with a blowing head, through which an oxidizer and a fuel are blown into a combustion chamber adjoining the blowing head, and with injection devices for water opening into the combustion chamber.

Bei derartigen Dampferzeugern besteht das Problem, den Oxidator und den Brennstoff optimal in die Brennkammer einzublasen, so daß eine vollständige Verbrennung erfolgt, wobei vorzugsweise der Oxidator und der Brennstoff in stöchiometrischen Verhältnissen eingeblasen werden und eine vollständige Verbrennung erreicht werden soll.In such steam generators there is the problem of optimally blowing the oxidizer and the fuel into the combustion chamber, so that complete combustion takes place, the oxidizer and the fuel preferably being blown in in stoichiometric ratios and complete combustion should be achieved.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Dampferzeuger der gattungsgemäßen Art zu schaffen, bei welchem optimale Verbrennungsverhältnisse in der Brenn­kammer geschaffen werden.The invention is therefore based on the object of creating a steam generator of the generic type in which optimum combustion conditions are created in the combustion chamber.

Diese Aufgabe wird bei einem Dampferzeuger der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß der Einblaskopf mehrere Einblaselemente aufweist, welche den Oxidator und den Brennstoff gemeinsam in die Brennkammer einblasen und welche einen der beiden in eine innere Zylinderströmung und den anderen in einer die innere Zylinderströmung umschließenden Ringströmung führen.This object is achieved according to the invention in a steam generator of the type described at the outset in that the injection head has a plurality of injection elements which form the Blow the oxidizer and the fuel together into the combustion chamber and which lead one of the two into an inner cylinder flow and the other into an annular flow surrounding the inner cylinder flow.

Der Vorteil der erfindungsgemäßen Lösung besteht darin, daß durch diese Art der Einblasung des Oxidators und des Brennstoffs eine zuverlässige und vor allem stöchiome­trische Verbrennung der beiden möglich ist, was insbe­sondere bei Verwendung von Sauerstoff als Oxidator und Wasserstoff als Brennstoff eine zwingende Notwendigkeit darstellt.The advantage of the solution according to the invention is that a reliable and, above all, stoichiometric combustion of the two is possible as a result of this type of injection of the oxidizer and the fuel, which is an imperative especially when using oxygen as the oxidizer and hydrogen as the fuel.

Besonders zweckmäßig ist eine Lösung bei welcher die Ring­strömung und die Zylinderströmung von dem Einblaselement direkt in die Brennkammer eingeblasen werden.A solution is particularly expedient in which the ring flow and the cylinder flow are blown directly into the combustion chamber by the injection element.

Ferner ist es von Vorteil, wenn die Ringströmung und die Zylinderströmung mit parallel zueinander verlaufenden Strömungsrichtungen im Einblaselement gebildet und in die Brennkammer eingeblasen wird.It is also advantageous if the ring flow and the cylinder flow are formed in the injection element with flow directions running parallel to one another and are blown into the combustion chamber.

Als besonders günstig hat es sich hierbei erwiesen, wenn die Ringströmung koaxial zur inneren Zylinderströmung ver­läuft.It has proven particularly favorable here if the ring flow runs coaxially with the inner cylinder flow.

Weiterhin hat sich bei der erfindungsgemäßen Ausbildung des Einblaskopfes als zweckmäßig erwiesen, wenn der Oxidator in der inneren Zylinderströmung und der Brenn­stoff in der äußeren Ringströmung geführt werden, so daß die Brennstoffströmung jeweils die Strömung des Oxidators umgibt.Furthermore, it has proven to be expedient in the configuration of the injection head according to the invention if the oxidizer is guided in the inner cylinder flow and the fuel in the outer ring flow, so that the fuel flow surrounds the flow of the oxidizer.

Wie bereits eingangs erwähnt, ist vorzugsweise der Oxidator Sauerstoff und der Brennstoff Wasserstoff, wobei beide in stöchiometrisch gehaltenen Massenstromverhält­nissen zugeführt werden.As already mentioned at the beginning, the oxidizer is preferably oxygen and the fuel is hydrogen, both being supplied in stoichiometrically maintained mass flow ratios.

Bei der Konzeption des erfindungsgemäßen Einblaskopfes hat es sich als besonders vorteilhaft erwiesen, wenn die Ein­blaselemente in einem Innenbereich einer Bodenplatte des Einblaskopfes angeordnet sind, welche einen den Innen­bereich umschließenden, einblaselementfreien Randbereich aufweist, wobei sich dieser Randbereich vorzugsweise bis zu einer die Brennkammer umschließenden Wand erstreckt. Durch das Vorsehen dieses einblaselementfreien Rand­bereichs wird insgesamt eine bessere Energieumsetzung stromabwärts der Einblaselemente und eine niedrigere Wärmebelastung der Brennkammerwand erreicht.In the design of the injection head according to the invention, it has proven to be particularly advantageous if the injection elements are arranged in an inner region of a base plate of the injection head, which has an edge region which surrounds the inner region and is free of injection elements, this edge region preferably extending as far as a wall surrounding the combustion chamber . Providing this edge area free of blowing elements results in better energy conversion downstream of the blowing elements and a lower thermal load on the combustion chamber wall.

Besonders vorteilhafte Relationen zwischen dem Innen­bereich und dem Randbereich ergeben sich dann, wenn die Fläche des Innenbereichs nicht mehr als das 0,6-fache der Gesamtfläche der Bodenplatte, gebildet aus der Summe der Flächen des Innen- und des Randbereichs, beträgt.Particularly advantageous relations arise between the inner region and the edge region if the area of the inner region is not more than 0.6 times the total surface of the base plate, formed from the sum of the surfaces of the inner and the edge region.

In einem bevorzugten Ausführungsbeispiel ist vorgesehen, daß die Bodenplatte kreisförmig ausgebildet ist. Somit ist es auch zweckmäßig, wenn der Innenbereich kreisförmig aus­gebildet ist und der Randbereich einen den Innenbereich umgebenden Kreisringbereich darstellt.In a preferred embodiment it is provided that the base plate is circular. It is therefore also expedient if the inner region is circular and the edge region represents an annular region surrounding the inner region.

Hinsichtlich der Ausbildung der Einblaselemente hat es sich ferner als vorteilhaft erwiesen, wenn die Quer­schnittsfläche der Zylinderströmung größer als die Querschnittsfläche der Ringströmung gehalten ist, um ins­besondere eine gute Vermischung zwischen dem Brennstoff und dem Oxidator zu erreichen.With regard to the design of the injection elements, it has also proven to be advantageous if the cross-sectional area of the cylinder flow is larger than that Cross-sectional area of the ring flow is kept, in particular to achieve good mixing between the fuel and the oxidizer.

Auch bezüglich der einzelnen, die Zylinderströmung und die Ringströmung führenden Rohre haben sich bei bestimmten Relationen vorteilhafte Brenneigenschaften der Einblas­elemente ergeben.Also with respect to the individual pipes guiding the cylinder flow and the ring flow, advantageous blowing properties of the injection elements have been obtained in certain relations.

So ist es besonders vorteilhaft, wenn die Länge des die Zylinderströmung ausbildenden Innenrohrs des Einblas­elements das mindestens Dreifache von dessen Durchmesser beträgt.It is particularly advantageous if the length of the inner tube of the injection element forming the cylinder flow is at least three times its diameter.

In gleicher Weise hat es sich alternativ oder zusätzlich zu dem Vorgenannten als besonders günstig erwiesen, wenn die Länge der die Ringströmung ausbildenden Mantelfläche des Einblaselements mindestens das Dreifache des "äqui­valenten" oder "hydraulischen" Durchmessers der Ring­strömung beträgt.In the same way, as an alternative or in addition to the aforementioned, it has proven particularly favorable if the length of the circumferential surface of the injection element forming the annular flow is at least three times the "equivalent" or "hydraulic" diameter of the annular flow.

Bei den bislang beschriebenen Ausführungsbeispielen wurde lediglich auf die Anordnung der Einblaselemente, welche während des Betriebs des Dampferzeugers die Zufuhr des Oxidators und des Brennstoffs übernehmen, eingegangen. Es wurde jedoch nichts darüber gesagt, wie eine Zündung des Oxidator/Brennstoffgemischs erfolgen soll.In the exemplary embodiments described so far, only the arrangement of the injection elements, which take over the supply of the oxidizer and the fuel during operation of the steam generator, was discussed. However, nothing has been said about how to ignite the oxidizer / fuel mixture.

So sieht ein besonders bevorzugtes Ausführungsbeispiel vor, daß in dem Randbereich der Bodenplatte eine Mündungs­öffnung einer Zündkammer oder Mündungsöffnungen mehrerer Zündkammern angeordnet sind. Dadurch wird erreicht, daß die Zündkammern außerhalb des Bereichs liegen, in welchem die für den Betrieb vorgesehenen Einblaselemente ange­ordnet sind und somit die Einblaselemente ohne Rücksicht auf die Zündkammern optimal angeordnet werden können.A particularly preferred exemplary embodiment provides that an orifice opening of an ignition chamber or orifice openings of a plurality of ignition chambers are arranged in the edge region of the base plate. This ensures that the ignition chambers are outside the area in which the blowing elements intended for operation are arranged and thus the blowing elements can be optimally arranged regardless of the ignition chambers.

Vorzugsweise sind, um eine gleichmäßige Zündung zu erreichen, mehrere Zündkammern vorgesehen.In order to achieve uniform ignition, a plurality of ignition chambers are preferably provided.

Während bei den Einblaselementen vorgesehen ist, daß diese den Oxidator und den Brennstoff so in die Brennkammer ein­blasen, daß diese sich erst in der Brennkammer vollständig vermischen, ist im Gegensatz dazu bei den Zündkammern vor­gesehen, daß in diesen der Oxidator und der Brennstoff zu einem zündfähigen Gemisch vermischt werden.While it is provided with the injection elements that they blow the oxidizer and the fuel into the combustion chamber in such a way that they only mix completely in the combustion chamber, on the contrary it is provided with the ignition chambers that the oxidizer and the fuel become ignitable in the latter Mixture to be mixed.

Vorzugsweise ist dabei die Zündkammer so ausgebildet, daß der in einer inneren Zylinderströmung zugeführte Oxidator und der in einer die innere Zylinderströmung umschließen­den Ringströmung geführte Brennstoff, vor deren Austritt aus der Bodenplatte in einem Zündraum, vollständig ver­mischt werden.The ignition chamber is preferably designed such that the oxidizer supplied in an inner cylinder flow and the fuel guided in an annular flow surrounding the inner cylinder flow are completely mixed before they emerge from the base plate in an ignition chamber.

Günstigerweise ist der Zündraum so angeordnet, daß er sich an ein inneres, die innere Zylinderströmung erzeugendes Zylinderrohr anschließt.The ignition chamber is advantageously arranged in such a way that it connects to an inner cylinder tube which generates the inner cylinder flow.

Außerdem ist zweckmäßigerweise der Zündraum so angeordnet, daß er von der Fortsetzung der die Ringströmung nach außen begrenzenden Mantelfläche umgrenzt ist.In addition, the ignition chamber is expediently arranged in such a way that it is bounded by the continuation of the outer surface delimiting the annular flow.

Zur Zündung des Gemischs aus Oxidator und Brennstoff ist vorzugsweise ein Zündelement im Zündraum vorgesehen, wobei insbesondere das Zündelement unmittelbar vor der Mündungs­öffnung angeordnet ist.To ignite the mixture of oxidizer and fuel, an ignition element is preferably provided in the ignition chamber, the ignition element in particular being arranged directly in front of the mouth opening.

Weitere Merkmale und Vorteile der Erfindung sind Gegen­stand der nachfolgenden Beschreibung sowie der zeichne­rischen Darstellung eines Ausführungsbeispiels; in der Zeichnung zeigen:

  • Fig. 1 einen teilweisen Längsschnitt durch ein schematisch dargestelltes Ausführungs­beispiel eines erfindungsgemäßen Dampf­erzeugers;
  • Fig. 2 eine vergrößerte Darstellung eines Einblas­kopfs, und
  • Fig. 3 einen Schnitt längs Linie 3-3 in Fig. 2.
Further features and advantages of the invention are the subject of the following description and the drawing of an exemplary embodiment; show in the drawing:
  • Figure 1 is a partial longitudinal section through a schematically illustrated embodiment of a steam generator according to the invention.
  • Fig. 2 is an enlarged view of an injection head, and
  • 3 shows a section along line 3--3 in FIG. 2.

Ein Ausführungsbeispiel eines erfindungsgemäßen Dampf­erzeugers, dargestellt in Fig. 1 umfaßt einen Einblaskopf 10, an welchen sich eine Brennkammer 12 anschließt, welche von einem Brennkammergehäuse 14 umgeben ist. In diesem Brennkammergehäuse sind im Abstand von dem Einblaskopf 10 mindestens einer oder auch mehrere Einspritzringe 16 ange­ordnet, mit welchen Wasser in die Brennkammer eingespritzt wird, so daß sich an einem dem Einblaskopf 10 gegenüber­liegenden Ende ein Dampfstrom 18 ausbildet, welcher durch eine Auslaßöffnung 20 aus dem Dampferzeuger austritt. Das erfindungsgemäße Ausführungsbeispiel wird vorzugsweise als Wasserstoff/Sauerstoff-Dampferzeuger betrieben, bei welchem ein Sauerstoffstrom GO₂ und ein Wasserstoffstrom GH₂ dem Einblaskopf 10 in stöchiometrischen Verhältnissen zugeführt werden, wobei dieser Einblaskopf 10 dann die beiden Ströme in die Brennkammer 12 einbläst.An exemplary embodiment of a steam generator according to the invention, shown in FIG. 1, comprises an injection head 10, to which a combustion chamber 12 adjoins, which is surrounded by a combustion chamber housing 14. In this combustion chamber housing at least one or more injection rings 16 are arranged at a distance from the injection head 10, with which water is injected into the combustion chamber, so that a steam flow 18 is formed at an end opposite the injection head 10, which flows through an outlet opening 20 from the Steam generator exits. The embodiment of the invention is preferably operated as a hydrogen / oxygen steam generator, in which an oxygen stream GO₂ and a hydrogen stream GH₂ are supplied to the injection head 10 in stoichiometric ratios, this injection head 10 then blowing the two streams into the combustion chamber 12.

Wie in Fig. 2 dargestellt, bildet der die Brennkammer 12 abschließende und als Ganzes mit 10 bezeichnete Einblas­kopf eine Bodenplatte 22, welche mit einem äußeren Auf­lagerand 24 an einem Abschlußflansch 26 des Brennkammer­gehäuses 14 anliegt und sich in einer senkrecht zu einer Längsachse 28 des Brennkammergehäuses verlaufenden Ebene erstreckt.As shown in FIG. 2, the injection head, which closes the combustion chamber 12 and is designated as a whole by 10, forms a base plate 22 which bears with an outer support edge 24 on an end flange 26 of the combustion chamber housing 14 and extends in a direction perpendicular to a longitudinal axis 28 of the combustion chamber housing Level extends.

In einem konzentrisch um die Längsachse 28 herum ver­laufenden, vorzugsweise kreisförmigen Innenbereich I ist die Bodenplatte 22 mit einer Vielzahl von als Ganzes mit 30 bezeichneten Einblaselementen versehen, welche mit einer Längsachse 32 parallel zur Längsachse 28 des Brenn­kammergehäuses ausgerichtet sind. Vorzugsweise sind dabei die Einblaselemente 30 in einem regelmäßigen Muster in dem Innenbereich I angeordnet und weisen im wesentlichen konstante Abstände voneinander auf.In a preferably circular inner region I that runs concentrically around the longitudinal axis 28, the base plate 22 is provided with a plurality of injection elements, designated as a whole by 30, which are aligned with a longitudinal axis 32 parallel to the longitudinal axis 28 of the combustion chamber housing. The blowing elements 30 are preferably arranged in a regular pattern in the inner region I and have essentially constant distances from one another.

Jedes dieser Einblaselemente 30 umfaßt eine Bohrung 34, welche sich von einer der Brennkammer 12 zugewandten Frontseite 36 der Bodenplatte 22 durch die Bodenplatte 22 hindurch in Richtung von der Brennkammer 12 weg bis zu einem Wasserstoffverteilerraum 38 erstreckt, und einem nachfolgend beschriebenen Innenrohr 50. Der Wasserstoff­verteilerraum 38 wird dabei gebildet von einem Zwischen­raum zwischen der Bodenplatte 22 und einem parallel zu dieser auf der der Brennkammer gegenüberliegenden Seite sowie im Abstand zu dieser angeordneten Zwischenboden 40, wobei die Zufuhr des Wasserstoffmassenstroms GH₂ vorzugs­weise in einem Außenbereich des Wasserstoffverteilerraums 38, insbesondere über eine in radialer Richtung zur Längs­achse 28 verlaufende Wasserstoffzuleitung 42 erfolgt, welche in den Wasserstoffverteilerraum 38 mündet.Each of these injection elements 30 comprises a bore 34, which extends from a front side 36 of the base plate 22 facing the combustion chamber 12 through the base plate 22 in the direction away from the combustion chamber 12 to a hydrogen distribution space 38, and an inner tube 50 described below. The hydrogen distribution space 38 is formed by a space between the base plate 22 and a parallel to this on the opposite side of the combustion chamber and at a distance from this arranged intermediate base 40, the supply of the hydrogen mass flow GH₂ preferably in an outer region of the hydrogen distribution space 38, in particular via a radial Direction of the longitudinal axis 28 extending hydrogen supply line 42 takes place, which opens into the hydrogen distribution space 38.

Auf der dem Wasserstoffverteilerraum 38 gegenüberliegenden Seite des Zwischenbodens 40 ist ein Sauerstoffverteiler­raum 44 vorgesehen, welcher einerseits durch den Zwischen­boden 40 und andererseits durch einen rückseitigen Deckel 46 des Einblaskopfs 10 gebildet wird. In diesen Sauer­stoffverteilerraum 44 mündet eine Sauerstoffzuleitung 48.An oxygen distribution space 44 is provided on the side of the intermediate floor 40 opposite the hydrogen distribution space 38, which is formed on the one hand by the intermediate floor 40 and on the other hand by a rear cover 46 of the injection head 10. An oxygen feed line 48 opens into this oxygen distribution space 44.

Außer durch die Bohrung 34 umfassen die Einblaselemente 30 auch noch das Innenrohr 50, welches den Zwischenboden 40 durchsetzt und von dem Sauerstoffverteilerraum 44 aus­gehend sich in Richtung der Brennkammer 12 erstreckt und innerhalb der Bohrung 34 mit einem vorderen Ende 52 mündet, wobei das vordere Ende 52 in einem Abstand a hinter der Frontseite 36 der Bodenplatte 22 liegt.In addition to the bore 34, the injection elements 30 also include the inner tube 50, which passes through the intermediate floor 40 and extends from the oxygen distribution space 44 in the direction of the combustion chamber 12 and opens into the bore 34 with a front end 52, the front end 52 is at a distance a behind the front side 36 of the base plate 22.

Das Innenrohr 50 ist dabei koaxial zur Längsachse des jeweiligen Einblaselements 30 ausgerichtet und weist einen Außendurchmesser auf, welcher kleiner als ein Innendurch­messer der Bohrung 34 ist, so daß, wie in Fig. 3 darge­stellt, zwischen dem Innenrohr 50 und der Bohrung 34 ein Ringspalt 54 verbleibt.The inner tube 50 is aligned coaxially to the longitudinal axis of the respective blowing element 30 and has an outer diameter which is smaller than an inner diameter of the bore 34, so that, as shown in FIG. 3, an annular gap 54 between the inner tube 50 and the bore 34 remains.

Da das Innenrohr 50 von dem Sauerstoffverteilerraum 44 ausgeht, strömt durch dieses Innenrohr 50 eine Zylinder­strömung 56 von Sauerstoffgas, welche aus diesem Innenrohr an dessen vorderem Ende 52 austritt.Since the inner tube 50 extends from the oxygen distribution space 44, a cylinder flow 56 of oxygen gas flows through this inner tube 50, which flows out of this inner tube at its front end 52.

Da die Bohrung 34 sich bis zu dem Wasserstoffverteilerraum 38 erstreckt, welcher von dem Innenrohr 50 aber voll­ständig durchsetzt ist, strömt in dem Ringspalt 54 zwischen dem Innenrohr 50 und der Bohrung 34 eine Ring­strömung 58 von Wasserstoffgas, welche um die Zylinder­strömung 56 bis zu dem vorderen Ende 52 des Innenrohrs 50 getrennt verläuft, so daß sich in dem Einblaselement 30 beide Strömungen erst ab dem vorderen Ende 52 des Innen­rohrs vermischen können. Da das vordere Ende 52 im Abstand a von der Frontseite 36 der Bodenplatte 22 angeordnet ist, beginnt eine Vermischung der Ringströmung 58 mit der Zylinderströmung 56 in geringem Maße schon vor der Front­seite der Bodenplatte 22 setzt sich aber dann in ver­stärktem Maße in die Brennkammer 12 hinein fort und erfolgt in dieser dann vollständig.Since the bore 34 extends to the hydrogen distribution space 38, which is, however, completely penetrated by the inner tube 50, an annular flow 58 of hydrogen gas flows in the annular gap 54 between the inner tube 50 and the bore 34, which flows around the cylinder flow 56 to the front End 52 of the inner tube 50 runs separately, so that in the blowing element 30th can mix both flows only from the front end 52 of the inner tube. Since the front end 52 is arranged at a distance a from the front side 36 of the base plate 22, mixing of the ring flow 58 with the cylinder flow 56 begins to a small extent even before the front side of the base plate 22 but then settles into the combustion chamber 12 to an increased extent continues and then takes place completely in this.

Erfindungsgemäß ist die für die Zylinderströmung zur Ver­fügung gestellte Querschnittsfläche FZ größer als die für die Ringströmung zur Verfügung gestellte Querschnitts­fläche FR, wobei zusätzlich stets die Bedingung einzu­halten ist, daß Sauerstoff und Wasserstoff in stöchiome­trischen Verhältnissen miteinander eingeblasen werden.According to the invention, the cross-sectional area FZ provided for the cylinder flow is larger than the cross-sectional area FR provided for the ring flow, with the additional requirement that the oxygen and hydrogen are blown in with one another in stoichiometric ratios.

Darüberhinaus ist in erfindungsgemäßer Weise die Länge LI des Innenrohrs 50 größer als der dreifache Durchmesser des Innenrohrs.In addition, in the manner according to the invention, the length LI of the inner tube 50 is greater than three times the diameter of the inner tube.

Außerdem ist in erfindungsgemäßer Weise auch die Länge LB einer Mantelfläche der Bohrung 34 so gewählt, daß sie größer ist als das dreifache des "äquivalenten" oder "hydraulischen" Durchmessers der Ringströmung 58, wobei sich dieser "äquivalente" oder "hydraulische" Durchmesser gemäß der Formel D = 4FR/U errechnet, wobei U der Umfang des Strömungsquerschnitts der Ringströmung 58 ist.In addition, the length LB of a lateral surface of the bore 34 is chosen so that it is greater than three times the "equivalent" or "hydraulic" diameter of the annular flow 58, this "equivalent" or "hydraulic" diameter according to the Formula D = 4FR / U calculated, where U is the circumference of the flow cross section of the ring flow 58.

Der Innenbereich I der Bodenplatte 22, welcher mit den Einblaselementen 30 versehen ist, ist noch zusätzlich umgeben von einem Randbereich R, welcher den Innenbereich I kreisringförmig umschließt und bis zu einer Innenwand­fläche 60 des Brennkammergehäuses 14 reicht. Erfindungs­gemäß ist dieser Randbereich R nicht mit Einblaselementen 30 versehen.The inner region I of the base plate 22, which is provided with the blowing elements 30, is additionally surrounded by an edge region R, which is the inner region I encloses an annular shape and extends up to an inner wall surface 60 of the combustion chamber housing 14. According to the invention, this edge region R is not provided with blowing elements 30.

Dagegen sind in dem Randbereich R vorzugsweise Zündkammern 62 vorgesehen, welche sich insbesondere in entgegenge­setzter Richtung zur Brennkammer 12 von der Bodenplatte 22 ausgehend erstrecken und mit ihrer vorderen Mündungs­öffnung 64 in der Frontseite 36 der Bodenplatte 22 münden.In contrast, ignition chambers 62 are preferably provided in the edge region R, which extend in particular in the opposite direction to the combustion chamber 12 from the base plate 22 and open with their front opening 64 in the front 36 of the base plate 22.

Die Zündkammern 62 umfassen dabei ein eine Außenwand desselben bildendes Hüllrohr 66 sowie ein koaxial in diesem Hüllrohr 66 angeordnetes Zylinderrohr 68, welches zwischen einer Innenwand des Hüllrohrs 66 und seiner eigenen Außenwand einen Ringraum 70 zwischen dem Hüllrohr 66 bildet. Ein hinteres Ende des Zylinderrohrs 68 ist mit einer Sauerstoffzuführleitung 72 verbunden, während ein hinteres Ende des Ringraums 70 mit einer Wasserstoffzu­führleitung 74 verbunden ist, so daß ebenfalls eine Zylinderströmung des Sauerstoffs von einer Ringströmung von Wasserstoff umgeben ist.The ignition chambers 62 comprise an outer tube 66 forming an outer wall thereof and a cylindrical tube 68 arranged coaxially in this outer tube 66, which forms an annular space 70 between the outer tube 66 between an inner wall of the outer tube 66 and its own outer wall. A rear end of the cylinder tube 68 is connected to an oxygen supply line 72, while a rear end of the annular space 70 is connected to a hydrogen supply line 74, so that a cylinder flow of oxygen is also surrounded by a ring flow of hydrogen.

Vorzugsweise endet das Zylinderrohr 68 in einem Abstand Z vor der Mündungsöffnung 64, so daß sich in der Zündkammer 62 die Ringströmung des Wasserstoffs mit der Zylinder­strömung des Sauerstoffs vollständig vermischen können. Vorzugsweise ist zwischen dem Ende des Zylinderrohrs 68 und der Mündungsöffnung 64 ein elektrischer Zünder 76 vorgesehen, welcher die sich mit der Zylinderströmung des Sauerstoffs vermischte Ringströmung des Wasserstoffs vor der Mündungsöffnung 64 zündet, so daß aus der Mündungs­öffnung 64 in der Bodenplatte 22 ein brennender Strahl 78 aus Wasserstoff und Sauerstoff austritt, welcher dann in der Lage ist, die im Innenbereich I aus der Bodenplatte 22 austretenden Wasserstoff/Sauerstoffströme zu zünden.The cylinder tube 68 preferably ends at a distance Z in front of the orifice 64 so that the ring flow of the hydrogen can completely mix with the cylinder flow of the oxygen in the ignition chamber 62. An electrical igniter 76 is preferably provided between the end of the cylinder tube 68 and the orifice opening 64, which ignites the ring flow of hydrogen mixed with the cylinder flow of oxygen in front of the orifice opening 64, so that a burning jet 78 emerges from the orifice opening 64 in the base plate 22 emerges from hydrogen and oxygen, which is then able to ignite the hydrogen / oxygen flows emerging from the base plate 22 in the inner region I.

Hierzu wird vorzugsweise zwischen dem vorderen Ende des Zylinderrohrs 68 und der Mündungsöffnung 64 ein Zündraum 80 ausgebildet, welcher die Länge Z aufweist und sich zwischen dem vorderen Ende des Zylinderrohrs 68 und der Mündungsöffnung 64 erstreckt. Vorzugsweise wird der Zünd­raum durch eine innere Mantelfläche 82 des Hüllrohrs 66 begrenzt, die ebenfalls zur Ausbildung der Ringströmung im Bereich zwischen dem Hüllrohr 66 und dem Zylinderrohr 68 beiträgt und sich bis zur Mündungsöffnung 64 fortsetzt. Zweckmäßigerweise ragt ein Zündkopf 84 des Zündelements 76 über diese innere Mantelfläche hervor und ist in einem Bereich der vollständigen Vermischung des Oxidators mit dem Brennstoff, vorzugsweise unmittelbar vor der Mündungs­öffnung 64 angeordnet.For this purpose, an ignition space 80 is preferably formed between the front end of the cylinder tube 68 and the mouth opening 64, which has the length Z and extends between the front end of the cylinder tube 68 and the mouth opening 64. The ignition space is preferably delimited by an inner circumferential surface 82 of the cladding tube 66, which likewise contributes to the formation of the ring flow in the region between the cladding tube 66 and the cylinder tube 68 and continues up to the mouth opening 64. An ignition head 84 of the ignition element 76 expediently protrudes beyond this inner lateral surface and is arranged in a region where the oxidizer is completely mixed with the fuel, preferably immediately in front of the opening 64.

Als Zündelement ist vorzugsweise eine Zündkerze oder eine Glühkerze vorgesehen.A spark plug or a glow plug is preferably provided as the ignition element.

Vorzugsweise ist bei dem erfindungsgemäßen Einblaskopf die Fläche FI des Innenbereichs so gewählt, daß sie kleiner oder gleich dem 0,6-fachen der Fläche FI + FRa, d.h. der Summe der Fläche des Innenbereichs FI und der Fläche des Randbereichs FRa beträgt.In the injection head according to the invention, the area FI of the inner region is preferably selected so that it is less than or equal to 0.6 times the area FI + FRa, i.e. is the sum of the area of the inner area FI and the area of the edge area FRa.

Claims (16)

1. Dampferzeuger mit einem Einblaskopf, durch welchen ein Oxidator und ein Brennstoff in eine sich an den Ein­blaskopf anschließende Brennkammer eingeblasen werden, und mit in die Brennkammer mündenden Einspritzvorrich­tungen für Wasser,
dadurch gekennzeichnet,
daß der Einblaskopf (10) mehrere Einblaselemente (30) aufweist, welche den Oxidator (O₂) und den Brennstoff (H₂) gemeinsam in die Brennkammer (12) einblasen und welche einen der beiden in einer inneren Zylinder­strömung (56) und den anderen in einer die innere Zylinderströmung (56) umschließenden Ringströmung (58) führen.1. steam generator with an injection head, through which an oxidizer and a fuel are injected into a combustion chamber adjoining the injection head, and with injection devices for water opening into the combustion chamber,
characterized by
that the injection head (10) has a plurality of injection elements (30) which blow the oxidizer (O₂) and the fuel (H₂) together into the combustion chamber (12) and which one of the two in an inner cylinder flow (56) and the other in one lead the ring flow (58) surrounding the inner cylinder flow (56). 2. Dampferzeuger nach Anspruch 1, dadurch gekennzeichnet, daß die Ringströmung (58) koaxial zur Zylinderströmung (56) verläuft.2. Steam generator according to claim 1, characterized in that the annular flow (58) extends coaxially to the cylinder flow (56). 3. Dampferzeuger nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß der Oxidator (O₂) in der inneren Zylinderströmung (56) und der Brennstoff H₂) in der Ringströmung (58) geführt sind.3. Steam generator according to claim 1 or 2, characterized in that the oxidizer (O₂) in the inner cylinder flow (56) and the fuel H₂) are guided in the ring flow (58). 4. Dampferzeuger nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Einblaselemente (30) in einem Innenbereich (I) einer Bodenplatte (22) des Einblaskopfs (10) angeordnet sind, welche einen den Innenbereich (I) umschließenden einblaselementfreien Randbereich (R) aufweist.4. Steam generator according to one of the preceding claims, characterized in that the injection elements (30) in an inner region (I) of a bottom plate (22) of the injection head (10) are arranged, which enclose the inner region (I) surrounding the blower element-free edge region (R) having. 5. Dampferzeuger nach Anspruch 4, dadurch gekennzeichnet, daß die Fläche des Innenbereichs (FI) weniger als das 0,6-fache der Gesamtfläche der Bodenplatte (22), gebildet aus der Summe der Flächen des Innenbereichs (FI) und des Randbereichs (FRa), beträgt.5. Steam generator according to claim 4, characterized in that the area of the inner region (FI) is less than 0.6 times the total area of the base plate (22), formed from the sum of the areas of the inner region (FI) and the edge region (FRa ). 6. Dampferzeuger nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Querschnittsfläche der Zylinderströmung (FZ) größer als die Querschnitts­fläche (FR) der Ringströmung ist.6. Steam generator according to one of the preceding claims, characterized in that the cross-sectional area of the cylinder flow (FZ) is larger than the cross-sectional area (FR) of the ring flow. 7. Dampferzeuger nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Länge (LI) des die Zylinderströmung (56) ausbildenden Innenrohres (50) des Einblaselements (30) mindestens ungefähr das Drei­fache von dessen Durchmesser beträgt.7. Steam generator according to one of the preceding claims, characterized in that the length (LI) of the cylinder flow (56) forming the inner tube (50) of the injection element (30) is at least approximately three times its diameter. 8. Dampferzeuger nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Länge (LB) der die Ringströmung (58) ausbildenden Mantelfläche (34) des Einblaselements (30) mindestens ungefähr das Dreifache des "äquivalenten" oder "hydraulischen" Durchmessers der Ringströmung (58) beträgt.8. Steam generator according to one of the preceding claims, characterized in that the length (LB) of the annular flow (58) forming the outer surface (34) of the injection element (30) is at least approximately three times the "equivalent" or "hydraulic" diameter of the annular flow ( 58) is. 9. Dampferzeuger nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß in dem Randbereich (R) der Bodenplatte (22) eine Mündungsöffnung (64) einer Zünd­kammer (62) angeordnet ist.9. Steam generator according to one of the preceding claims, characterized in that an opening (64) of an ignition chamber (62) is arranged in the edge region (R) of the base plate (22). 10. Dampferzeuger nach Anspruch 9, dadurch gekennzeichnet, daß mehrere Zündkammern (62) vorgesehen sind.10. Steam generator according to claim 9, characterized in that a plurality of ignition chambers (62) are provided. 11. Dampferzeuger nach Anspruch 9 oder 10, dadurch gekenn­zeichnet, daß die Zündkammer (62) so ausgebildet ist, daß der Oxidator (O₂) und der Brennstoff (H₂) zu einem zündfähigen Gemisch vermischt werden.11. Steam generator according to claim 9 or 10, characterized in that the ignition chamber (62) is designed such that the oxidizer (O₂) and the fuel (H₂) are mixed to form an ignitable mixture. 12. Dampferzeuger nach Anspruch 11, dadurch gekenn­zeichnet, daß die Zündkammer (62) so ausgebildet ist, daß der in einer inneren Zylinderströmung zugeführte Oxidator (O₂) und der in einer die innere Zylinder­strömung umgebenden Ringströmung zugeführte Brennstoff (H₂) vor deren Austritt aus der Bodenplatte (22) in einem Zündraum (80) vermischt werden.12. A steam generator according to claim 11, characterized in that the ignition chamber (62) is designed such that the oxidizer (O₂) supplied in an inner cylinder flow and the fuel (H₂) supplied in an annular flow surrounding the inner cylinder flow prior to their exit from the Base plate (22) are mixed in an ignition chamber (80). 13. Dampferzeuger nach Anspruch 12, dadurch gekenn­zeichnet, daß der Zündraum (80) sich an ein inneres, die innere Zylinderströmung erzeugendes Zylinderrohr (68) anschließt.13. Steam generator according to claim 12, characterized in that the ignition chamber (80) adjoins an inner cylinder tube (68) which generates the inner cylinder flow. 14. Dampferzeuger nach Anspruch 12 oder 13, dadurch gekennzeichnet, daß der Zündraum (80) von der Fort­setzung der die Ringströmung nach außen begrenzenden Mantelfläche (82) umgrenzt ist.14. A steam generator according to claim 12 or 13, characterized in that the ignition chamber (80) is bounded by the continuation of the outer surface delimiting the annular flow (82). 15. Dampferzeuger nach einem der Ansprüche 9 bis 14, dadurch gekennzeichnet, daß ein Zündelement (66) in dem Zündraum (80) angeordnet ist.15. Steam generator according to one of claims 9 to 14, characterized in that an ignition element (66) is arranged in the ignition chamber (80). 16. Dampferzeuger nach Anspruch 15, dadurch gekenn­zeichnet, daß das Zündelement (66) unmittelbar vor der Mündungsöffnung (64) angeordnet ist.16. Steam generator according to claim 15, characterized in that the ignition element (66) is arranged directly in front of the mouth opening (64).
EP90120170A 1989-11-04 1990-10-20 Steam generator Expired - Lifetime EP0427033B1 (en)

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DE3936806 1989-11-04
DE3936806A DE3936806C2 (en) 1989-11-04 1989-11-04 Steam generator

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JP (1) JP2609354B2 (en)
DE (1) DE3936806C2 (en)
DK (1) DK0427033T3 (en)
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Also Published As

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ES2068308T3 (en) 1995-04-16
DE3936806A1 (en) 1991-05-08
JPH03221703A (en) 1991-09-30
EP0427033B1 (en) 1994-12-28
FI97422C (en) 1996-12-10
US5088450A (en) 1992-02-18
EP0427033A3 (en) 1991-09-04
JP2609354B2 (en) 1997-05-14
DK0427033T3 (en) 1995-06-06
FI97422B (en) 1996-08-30
DE3936806C2 (en) 1995-04-20
FI905454A0 (en) 1990-11-02

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