EP0209631A1 - Process and burner for combusting liquid fuel - Google Patents

Process and burner for combusting liquid fuel Download PDF

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Publication number
EP0209631A1
EP0209631A1 EP86103115A EP86103115A EP0209631A1 EP 0209631 A1 EP0209631 A1 EP 0209631A1 EP 86103115 A EP86103115 A EP 86103115A EP 86103115 A EP86103115 A EP 86103115A EP 0209631 A1 EP0209631 A1 EP 0209631A1
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EP
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Prior art keywords
fuel
air mixture
section
burner
air
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EP86103115A
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German (de)
French (fr)
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EP0209631B1 (en
Inventor
Friedhelm Salzmann
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Deutsche Babcock Werke AG
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Deutsche Babcock Werke AG
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Priority to AT86103115T priority Critical patent/ATE38424T1/en
Publication of EP0209631A1 publication Critical patent/EP0209631A1/en
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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
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet

Definitions

  • the invention relates to a method for burning liquid fuel and a burner with the features of the preamble of claims 1 and 2.
  • the combustion of liquid fuels containing hydrocarbons basically requires the preparation step of gasifying the liquid before the combustion. If this process takes place within a certain critical time, which is around a hundredth of a second, the combustion proceeds exclusively via gaseous intermediate oxidation products, with the end product carbon dioxide ultimately being formed by oxidation of carbon monoxide. This suppresses the formation of soot, the particles of which act as condensation nuclei for acidic combustion products. In addition, a soot coating on the heat exchange surface leads to additional energy losses.
  • DE-PS 30 38 063 describes a burner of the generic type in which a flow path for the combustion air is formed between the conical outer surfaces of an insert body and a guide body.
  • the cone tip points to the fuel feed line. In this way, the air is conducted in a return flow to the fuel supply.
  • the insert body is provided on the outside with guide vanes, which force a swirl on the air flow. This swirl creates a swirling movement in the fuel-air mixture, which causes a recirculation movement of the reactants, but at the same time pushes the fuel drops outwards.
  • the effect of reducing the formation of soot which is intended by the design of the known burner, can only set inadequately, since no absolutely homogeneous mixture is produced.
  • the invention has for its object to design the generic method and the burner such that the fuel burns with a completely soot-free flame even at low throughputs and clogging of the outlet bore through which the fuel flows is avoided.
  • the compact fuel is broken down into extremely fine droplets by air jets directed against one another and homogeneously mixed with the combustion air.
  • the mixing is further improved by the fact that the air is supplied in a swirl-free manner, so that no centrifugal force acts on the drops, by means of which they can be forced outward and separated.
  • the conditions are created under which the combustion of the liquid fuel can only take place via gaseous intermediate oxidation products and thus without the formation of soot.
  • the dimensioning of the outlet opening and the resulting flow velocity ensure that the flame root lies at a certain distance from the place of mixing and that homogeneous mixing of atomized fuel and combustion air is achieved.
  • the dimensioning of the conical section ensures that the flame root is still inside the outlet opening.
  • the drawing shows a longitudinal section through a burner according to the invention.
  • the burner has a guide tube 1 which is provided with a connection 2 for the supply of combustion air.
  • a cylindrical guide body 4 with a flat bottom surface 20 is provided within the guide tube 1.
  • the guide body 4 is axially displaceable. It is arranged at a distance from the guide tube 1 such that an annular channel 3 is formed. The distance is maintained by flat spacers 21, which do not produce a twist.
  • the combustion air flows through this channel 3 in an axially parallel and swirl-free manner.
  • a fuel line for the supply of liquid fuel is arranged centrally in the guide tube 1.
  • the fuel line consists of a tube 5 and an outlet bore 6 which is guided through the longitudinal axis of the guide body 4.
  • the outlet bore 6 opens centrally into the bottom surface 20 of the guide body 4.
  • the guide tube 1 is closed on the outlet side by a closing body 7.
  • the closing body 7 is provided with a flange 8, by means of which the closing body 7 is fastened to a flange 9 of a combustion chamber 10.
  • the combustion chamber 10 is part of a heating boiler 11.
  • the closure body 7 has an outlet opening 12 in the extension of the outlet bore 6.
  • a high-voltage ignition 13 and a flame monitor 14 are passed through the end body 7 and protrude into the combustion chamber 10.
  • the end body 7 contains on the side facing the guide tube 1 a flat end face 15 which is at an axial distance from the bottom surface 20 of the guide body 4.
  • the bottom surface 20 and the end face lie parallel to one another and form a gap 16 of constant width, which runs perpendicular to the longitudinal axis of the outlet bore 6.
  • the gap 16 is connected to the annular channel 3 and has a substantially smaller cross section than this.
  • the gap width can be varied by the adjustability of the guide body 4.
  • the cylindrical section 17 merges with a sudden increase in its diameter into a conically widening section 18.
  • a tear-off edge 19 is thereby formed between the cylindrical section 17 and the conical section 18.
  • the cross section of the cylindrical section 17 is chosen so large that the flow velocity of the medium flowing through it is always at least three times greater than the ignition speed of the fuel.
  • the rate of ignition is the rate at which a flame travels back through a fuel-air mixture. For oil, it is approximately 12 m / s.
  • the largest diameter of the conical section 18 is dimensioned such that the flow velocity of the medium at the outlet from the section 18 is reduced to a speed which is below the ignition speed.
  • the liquid fuel emerges through the central outlet bore 6 as a compact jet at an average speed of 2 m / s.
  • the combustion air flows axially parallel and swirl-free through the annular channel 3 and, after a deflection of 90 ° in the gap 16, strikes the fuel jet perpendicularly.
  • the air jets are considerably accelerated within the gap 16 formed by the plane-parallel surfaces 15, 20 and collide at high speed in the center of the gap 16.
  • the highly accelerated air jets break the centrally entering fuel jet into fine droplets with a diameter of about 0.02 mm and produce a homogeneous mixture of fuel droplets and air.
  • the fuel-air mixture prepared in this way flows through the cylindrical section 17 of the outlet opening 12 at a flow speed which is significantly above the ignition speed, this speed being reduced within the conical section 18 to a value below the ignition speed.
  • the flame root stabilizes in the conical section 18 of the outlet opening 12, and even when the combustion chamber 10 is cold, a soot-free flame with a very rapid combustion reaction is formed immediately, so that the combustion of the fuel vapors is already at Exit from the combustion chamber 10 is complete.
  • This enables the construction of heat exchangers with small dimensions and turbulent flue gas flow in narrow flue gas flues, especially since soot is not produced in any setting, not even in the absence of air.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)

Abstract

1. Process for the combustion of liquid fuel with air for combustion which is guided free of spin perpendicularly to a central fuel jet through a gap bounded by two planar parallel surfaces and is at the same time accelerated appreciably, wherein the compact fuel jet is broken up and the fuel-air mixture thus produced is conducted to a combustion space, characterized thereby, that the fuel-air mixture is conducted away at a flow speed which corresponds to three times the ignition speed.

Description

Die Erfindung betrifft ein Verfahren zum Verbrennen von flüs­sigem Brennstoff und einen Brenner mit den Merkmalen des Ober­begriffes der Patentansprüche 1 und 2.The invention relates to a method for burning liquid fuel and a burner with the features of the preamble of claims 1 and 2.

Die Verbrennung von flüssigen, Kohlenwasserstoffe enthaltenden Brennstoffen verlangt grundsätzlich den Aufbereitungsschritt der Vergasung der Flüssigkeit vor der Verbrennung. Vollzieht sich dieser Vorgang innerhalb einer gewissen kritischen Zeit, die etwa bei einer hundertstel Sekunde liegt, verläuft die Ver­brennung ausschließlich über gasförmige Zwischenoxidations­produkte, wobei schließlich das Endprodukt Kohlendioxid durch Oxidation von Kohlenmonoxid entsteht. Dabei wird die Bildung von Ruß unterdrückt, dessen Partikel als Kondensationskerne für saure Verbrennungsprodukte wirken. Ferner führt ein Rußbelag auf der Wärmeaustauschfläche zu zusätzlichen Energieverlusten.The combustion of liquid fuels containing hydrocarbons basically requires the preparation step of gasifying the liquid before the combustion. If this process takes place within a certain critical time, which is around a hundredth of a second, the combustion proceeds exclusively via gaseous intermediate oxidation products, with the end product carbon dioxide ultimately being formed by oxidation of carbon monoxide. This suppresses the formation of soot, the particles of which act as condensation nuclei for acidic combustion products. In addition, a soot coating on the heat exchange surface leads to additional energy losses.

In der DE-PS 30 38 063 ist ein Brenner der gattungsgemäßen Art beschrieben, bei dem zwischen den konischen Mantelflächen eines Einsatzkörpers und eines Leitkörpers ein Strömungsweg für die Verbrennungsluft gebildet ist. Dabei weist die Konusspitze zur Brennstoffzuleitung. Auf diese Weise wird die Luft in einer Rückströmung zur Brennstoffzuführung geführt. Darüber hinaus ist der Einsatzkörper auf seiner Außenseite mit Leitschaufeln versehen, die dem Luftstrom einen Drall aufzwingen. Dieser Drall erzeugt in dem Brennstoff-Luft-Gemisch eine Wirbelbewe­gung, die eine Rezirkulationsbewegung der Reaktionspartner bewirkt, dabei aber die Brennstofftropfen nach außen drängt. Die durch die Gestaltung des bekannten Brenners beabsichtigte Wirkung einer Verringerung der Rußbildung kann sich nur unzu­reichend einstellen, da kein absolut homogenes Gemisch entsteht.DE-PS 30 38 063 describes a burner of the generic type in which a flow path for the combustion air is formed between the conical outer surfaces of an insert body and a guide body. The cone tip points to the fuel feed line. In this way, the air is conducted in a return flow to the fuel supply. In addition, the insert body is provided on the outside with guide vanes, which force a swirl on the air flow. This swirl creates a swirling movement in the fuel-air mixture, which causes a recirculation movement of the reactants, but at the same time pushes the fuel drops outwards. The effect of reducing the formation of soot, which is intended by the design of the known burner, can only set inadequately, since no absolutely homogeneous mixture is produced.

Der Erfindung liegt die Aufgabe zugrunde, das gattungsgemäße Verfahren und den Brenner derart auszubilden, daß auch bei ge­ringen Durchsätzen der Brennstoff mit einer völlig rußfreien Flamme brennt und ein Verstopfen der vom Brennstoff durchflos­senen Austrittsbohrung vermieden wird.The invention has for its object to design the generic method and the burner such that the fuel burns with a completely soot-free flame even at low throughputs and clogging of the outlet bore through which the fuel flows is avoided.

Diese Aufgabe wird bei einem gattungsgemäßen Verfahren durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst. Ein Brenner insbesondere zur Durchführung dieses Verfahrens ist durch die Merkmale des Patentanspruches 2 gekennzeichnet. Vor­teilhafte Ausgestaltungen der Erfindung sind in den Unteran­sprüchen angegeben.This object is achieved in a generic method by the characterizing features of claim 1. A burner especially for performing this method is characterized by the features of claim 2. Advantageous embodiments of the invention are specified in the subclaims.

Bei dem Erfindungsgegenstand wird der kompakte Brennstoff durch einander entgegengerichtete Luftstrahlen in feinste Tröpfchen zerschlagen und mit der Verbrennungsluft homogen vermischt. Die Vermischung wird noch dadurch verbessert, daß die Luft drallfrei zugeführt wird, so daß auf die Tropfen keine Zentrifugalkraft wirkt, durch die sie nach außen gedrängt und separiert werden könnten. Auf diese Weise werden die Vorausset­zungen geschaffen, unter denen die Verbrennung des flüssigen Brennstoffes ausschließlich über gasförmige Zwischenoxidations­produkte und damit ohne Rußbildung erfolgen kann. Gleichzeitig ist durch die Bemessung der Austrittsöffnung und die sich da­durch einstellende Strömungsgeschwindigkeit sichergestellt, daß die Flammenwurzel in einem bestimmten Abstand von dem Ort der Vermischung liegt und eine homogene Vermischung von fein zerstäubtem Brennstoff und Verbrennungsluft erzielt wird. Durch die Bemessung des konischen Abschnittes wird erreicht, daß die Flammenwurzel aber noch innerhalb der Austrittsöffnung sich be­findet.In the subject matter of the invention, the compact fuel is broken down into extremely fine droplets by air jets directed against one another and homogeneously mixed with the combustion air. The mixing is further improved by the fact that the air is supplied in a swirl-free manner, so that no centrifugal force acts on the drops, by means of which they can be forced outward and separated. In this way, the conditions are created under which the combustion of the liquid fuel can only take place via gaseous intermediate oxidation products and thus without the formation of soot. At the same time, the dimensioning of the outlet opening and the resulting flow velocity ensure that the flame root lies at a certain distance from the place of mixing and that homogeneous mixing of atomized fuel and combustion air is achieved. The dimensioning of the conical section ensures that the flame root is still inside the outlet opening.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dar­gestellt und wird im folgenden näher erläutert. Die Zeichnung stellt einen Längsschnitt durch einen Brenner gemäß der Erfin­dung dar.An embodiment of the invention is shown in the drawing and is explained in more detail below. The drawing shows a longitudinal section through a burner according to the invention.

Der Brenner weist ein Führungsrohr 1 auf, das mit einem An­schluß 2 für die Zuführung von Verbrennungsluft versehen ist. Innerhalb des Führungsrohres 1 ist ein zylindrischer Leitkörper 4 mit einer ebenen Bodenfläche 20 vorgesehen. Der Leitkörper 4 ist axial verschiebbar. Er ist mit Abstand von dem Führungsrohr 1 derart angeordnet, daß ein ringförmiger Kanal 3 gebildet ist. Dabei wird der Abstand durch ebene Distanzstücke 21, die keinen Drall erzeugen, eingehalten. Dieser Kanal 3 wird von der Ver­brennungsluft achsparallel und drallfrei durchströmt.The burner has a guide tube 1 which is provided with a connection 2 for the supply of combustion air. A cylindrical guide body 4 with a flat bottom surface 20 is provided within the guide tube 1. The guide body 4 is axially displaceable. It is arranged at a distance from the guide tube 1 such that an annular channel 3 is formed. The distance is maintained by flat spacers 21, which do not produce a twist. The combustion air flows through this channel 3 in an axially parallel and swirl-free manner.

Zentrisch in dem Führungsrohr 1 ist eine Brennstoffleitung für die Zuführung von flüssigem Brennstoff angeordnet. Die Brennstoffleitung besteht aus einem Rohr 5 und einer Austritts­bohrung 6, die durch die Längsachse des Leitkörpers 4 geführt ist. Die Austrittsbohrung 6 mündet zentrisch in die Bodenfläche 20 des Leitkörpers 4.A fuel line for the supply of liquid fuel is arranged centrally in the guide tube 1. The fuel line consists of a tube 5 and an outlet bore 6 which is guided through the longitudinal axis of the guide body 4. The outlet bore 6 opens centrally into the bottom surface 20 of the guide body 4.

Das Führungsrohr 1 ist austrittsseitig durch einen Abschlußkör­per 7 verschlossen. Der Abschlußkörper 7 ist mit einem Flansch 8 versehen, über den der Abschlußkörper 7 an einem Flansch 9 einer Brennkammer 10 befestigt ist. Die Brennkammer 10 ist ein Teil eines Heizungskessels 11. Der Abschlußkörper 7 weist in der Verlängerung der Austrittsbohrung 6 eine Austrittsöffnung 12 auf. Außerdem sind durch den Abschlußkörper 7 eine Hochspan­nungszündung 13 und eine Flammenüberwachung 14 hindurchgeführt, die in die Brennkammer 10 hineinragen.The guide tube 1 is closed on the outlet side by a closing body 7. The closing body 7 is provided with a flange 8, by means of which the closing body 7 is fastened to a flange 9 of a combustion chamber 10. The combustion chamber 10 is part of a heating boiler 11. The closure body 7 has an outlet opening 12 in the extension of the outlet bore 6. In addition, a high-voltage ignition 13 and a flame monitor 14 are passed through the end body 7 and protrude into the combustion chamber 10.

Der Abschlußkörper 7 enthält auf der dem Führungsrohr 1 zuge­wandten Seite eine ebene Stirnfläche 15, der in einem axialen Abstand die Bodenfläche 20 des Leitkörpers 4 gegenübersteht. Die Bodenfläche 20 und die Stirnfläche liegen parallel zuein­ander und bilden einen Spalt 16 von gleichbleibender Breite, der senkrecht zu der Längsachse der Austrittsbohrung 6 verläuft.The end body 7 contains on the side facing the guide tube 1 a flat end face 15 which is at an axial distance from the bottom surface 20 of the guide body 4. The bottom surface 20 and the end face lie parallel to one another and form a gap 16 of constant width, which runs perpendicular to the longitudinal axis of the outlet bore 6.

Der Spalt 16 steht mit dem ringförmigen Kanal 3 in Verbindung und weist einen wesentlich geringeren Querschnitt als dieser auf. Durch die Verstellbarkeit des Leitkörpers 4 kann die Spaltbreite variiert werden.The gap 16 is connected to the annular channel 3 and has a substantially smaller cross section than this. The gap width can be varied by the adjustability of the guide body 4.

Die Austrittsöffnung 12 weist, in Strömungsrichtung gesehen, zunächst einen zylindrischen Abschnitt 17 auf, dessen Durchmes­ser gleich seiner Höhe ist. Der zylindrische Abschnitt 17 geht unter sprunghafter Vergrößerung seines Durchmessers in einen sich konisch erweiternden Abschnitt 18 über. Zwischen dem zylindrischen Abschnitt 17 und dem konischen Abschnitt 18 ist dadurch eine Abreißkante 19 gebildet. Der Querschnitt des zylindrischen Abschnittes 17 ist in Abhängigkeit von der Breite des Spaltes 16 so groß gewählt, daß in ihm die Strömungsge­schwindigkeit des durchströmenden Mediums stets um mindestens das Dreifache größer ist als die Zündgeschwindigkeit des Brennstoffes. Die Zündgeschwindigkeit ist die Geschwindigkeit, mit der eine Flamme durch ein Brennstoff-Luft-Gemisch zurück­wandert. Sie beträgt für Öl etwa 12 m/s. Der größte Durchmesser des konischen Abschnittes 18 ist so dimensioniert, daß die Strömungsgeschwindigkeit des Mediums am Austritt aus dem Ab­schnitt 18 auf eine Geschwindigkeit abgebaut wird, die unterhalb der Zündgeschwindigkeit liegt.The outlet opening 12, viewed in the direction of flow, initially has a cylindrical section 17, the diameter of which is equal to its height. The cylindrical section 17 merges with a sudden increase in its diameter into a conically widening section 18. A tear-off edge 19 is thereby formed between the cylindrical section 17 and the conical section 18. Depending on the width of the gap 16, the cross section of the cylindrical section 17 is chosen so large that the flow velocity of the medium flowing through it is always at least three times greater than the ignition speed of the fuel. The rate of ignition is the rate at which a flame travels back through a fuel-air mixture. For oil, it is approximately 12 m / s. The largest diameter of the conical section 18 is dimensioned such that the flow velocity of the medium at the outlet from the section 18 is reduced to a speed which is below the ignition speed.

Durch die zentrische Austrittsbohrung 6 tritt der flüssige Brennstoff als kompakter Strahl mit einer mittleren Geschwin­digkeit von 2 m/s aus. Die Verbrennungsluft strömt achsparallel und drallfrei durch den ringförmigen Kanal 3 und trifft nach einer Umlenkung von 90° in dem Spalt 16 senkrecht auf den Brennstoffstrahl. Innerhalb des durch die planparallelen Flä­chen 15, 20 gebildeten Spaltes 16 werden die Luftstrahlen erheblich beschleunigt und prallen im Zentrum des Spaltes 16 mit hoher Geschwindigkeit zusammen.The liquid fuel emerges through the central outlet bore 6 as a compact jet at an average speed of 2 m / s. The combustion air flows axially parallel and swirl-free through the annular channel 3 and, after a deflection of 90 ° in the gap 16, strikes the fuel jet perpendicularly. The air jets are considerably accelerated within the gap 16 formed by the plane-parallel surfaces 15, 20 and collide at high speed in the center of the gap 16.

Die hochbeschleunigten Luftstrahlen zerschlagem den zentrisch eintretenden Brennstoffstrahl in feinste Tröpfchen mit einem Durchmesser von etwa 0,02 mm und erzeugen eine homogene Vermi­schung von Brennstofftröpfchen und Luft. Das so aufbereitete Brennstoff-Luft-Gemisch durchströmt den zylindrischen Abschnitt 17 der Austrittsöffnung 12 mit einer Strömungsgeschwindigkeit, die deutlich oberhalb der Zündgeschwindigkeit liegt, wobei die­se Geschwindigkeit innerhalb des konischen Abschnittes 18 auf einen Wert unterhalb der Zündgeschwindigkeit abgebaut wird. Nach der Zündung des Brennstoff-Luft-Gemisches in der Brennkammer 10 stabilisiert sich die Flammenwurzel in dem konischen Abschnitt 18 der Austrittsöffnung 12, wobei auch bei kalter Brennkammer 10 sofort eine rußfreie Flamme mit sehr rascher Verbrennungsreaktion entsteht, so daß die Verbrennung der Brennstoffdämpfe bereits beim Austritt aus der Brennkammer 10 abgeschlossen ist. Dies ermöglicht die Konstruktion von Wärmetauschern mit geringen Abmessungen und turbulenter Rauch­gasströmung in engen Rauchgaszügen, zumal in keiner Einstellung, auch nicht bei Luftmangel, Ruß entsteht.The highly accelerated air jets break the centrally entering fuel jet into fine droplets with a diameter of about 0.02 mm and produce a homogeneous mixture of fuel droplets and air. The fuel-air mixture prepared in this way flows through the cylindrical section 17 of the outlet opening 12 at a flow speed which is significantly above the ignition speed, this speed being reduced within the conical section 18 to a value below the ignition speed. After the ignition of the fuel-air mixture in the combustion chamber 10, the flame root stabilizes in the conical section 18 of the outlet opening 12, and even when the combustion chamber 10 is cold, a soot-free flame with a very rapid combustion reaction is formed immediately, so that the combustion of the fuel vapors is already at Exit from the combustion chamber 10 is complete. This enables the construction of heat exchangers with small dimensions and turbulent flue gas flow in narrow flue gas flues, especially since soot is not produced in any setting, not even in the absence of air.

Claims (4)

1. Verfahren zum Verbrennen von flüssigem Brennstoff mit Ver­brennungsluft, die radial gegen einen zentralen Brennstoffstrahl geführt und durch die der kompakte Brennstoffstrahl zerschlagen wird, worauf das so erzeugte Brennstoff-Luft-Gemisch einem Brennraum zugeführt wird, da­durch gekennzeichnet, daß die Verbrennungsluft drallfrei durch einen durch zwei planparallele Flächen begrenzten Spalt senkrecht zum Brennstoffstrahl geführt und dabei er­heblich beschleunigt wird und daß das Brennstoff-Luft-Gemisch mit einer Strömungsgeschwindigkeit abgeführt wird, die der dreifachen Zündgeschwindigkeit ent­spricht.1. A method for burning liquid fuel with combustion air, which is guided radially against a central fuel jet and through which the compact fuel jet is broken, whereupon the fuel-air mixture thus produced is fed to a combustion chamber, characterized in that the combustion air is swirl-free by a through two plane-parallel surfaces limited gap perpendicular to the fuel jet and thereby accelerated considerably and that the fuel-air mixture is discharged at a flow rate that corresponds to three times the ignition speed. 2. Brenner für flüssigen Brennstoff mit einem Führungsrohr (1) für Verbrennungsluft, in dem mit Abstand unter Bildung eines ringförmigen Kanales (3) ein Leitkörper (4) angeordnet ist, der axial verstellbar ist und durch den axial eine Brennstoffleitung mit einer zentrischen Austrittsbohrung (6) geführt ist, zu der koaxial eine Austrittsöffnung (12) für das Brennstoff-Luft-Gemisch vorgesehen ist, insbesondere zur Durchführung eines Verfahrens nach Anspruch 1, dadurch ge­kennzeichnet, daß am austrittsseitigen Ende des Führungsrohres (1) durch zwei planparallele Flächen (15, 20) ein Spalt (16) begrenzt ist, der senkrecht zur Achse der Austrittsbohrung (6) im Leitkörper (4) verläuft und einen wesentlich engeren Querschnitt als der ringförmige Kanal (3) aufweist und daß der Querschnitt der Austrittsöffnung (12) für das Brennstoff-Luft-Gemisch in Abhängigkeit von der Lei­stung des Brenners so groß bemessen ist, daß die Strömungsgeschwindigkeit des Gemisches mindestens der drei­fachen Zündgeschwindigkeit entspricht.2. Burner for liquid fuel with a guide tube (1) for combustion air, in which a guide body (4) is arranged at a distance to form an annular channel (3), which is axially adjustable and through which a fuel line with a central outlet bore ( 6), to which an outlet opening (12) for the fuel-air mixture is provided coaxially, in particular for carrying out a method according to claim 1, characterized in that at the outlet-side end of the guide tube (1) through two plane-parallel surfaces (15 , 20) a gap (16) is limited, which runs perpendicular to the axis of the outlet bore (6) in the guide body (4) and has a substantially narrower cross section than the annular channel (3) and that the cross section of the outlet opening (12) for the Fuel-air mixture, depending on the performance of the burner, is dimensioned so large that the flow rate of the mixture is at least three times the ignition speed equality corresponds. 3. Brenner nach Anspruch 2, dadurch gekennzeichnet, daß die Austrittsöffnung (12) zunächst einen zylindrischen Abschnitt (17) aufweist, dessen Durchmesser und Länge gleich groß sind und daß der zylindrische Abschnitt (17) in Strömungsrichtung des Brennstoff-Luft-Gemisches in einen sich konisch erwei­ternden Abschnitt (18) übergeht.3. Burner according to claim 2, characterized in that the outlet opening (12) first has a cylindrical portion (17), the diameter and length of which are the same size and that the cylindrical portion (17) in the flow direction of the fuel-air mixture in one widening conically widening section (18). 4. Brenner nach Anspruch 3, dadurch gekennzeichnet, daß der kleinste Durchmesser des konischen Abschnittes (18) größer ist als der Durchmesser des zylindrischen Abschnittes (17) und daß der größte Durchmesser des konischen Abschnittes (18) einen solchen Wert aufweist, daß die Strömungsgeschwin­digkeit des Brennstoff-Luft-Gemisches kleiner als die Zündgeschwindigkeit ist.4. Burner according to claim 3, characterized in that the smallest diameter of the conical section (18) is larger than the diameter of the cylindrical section (17) and that the largest diameter of the conical section (18) has a value such that the flow rate of the fuel-air mixture is less than the ignition speed.
EP86103115A 1985-07-24 1986-03-08 Process and burner for combusting liquid fuel Expired EP0209631B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103115T ATE38424T1 (en) 1985-07-24 1986-03-08 PROCESSES AND BURNERS FOR COMBUSTING LIQUID FUEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3526482A DE3526482C1 (en) 1985-07-24 1985-07-24 Burners for burning liquid fuel
DE3526482 1985-07-24

Publications (2)

Publication Number Publication Date
EP0209631A1 true EP0209631A1 (en) 1987-01-28
EP0209631B1 EP0209631B1 (en) 1988-11-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103115A Expired EP0209631B1 (en) 1985-07-24 1986-03-08 Process and burner for combusting liquid fuel

Country Status (3)

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EP (1) EP0209631B1 (en)
AT (1) ATE38424T1 (en)
DE (2) DE3526482C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002010645A2 (en) * 2000-07-27 2002-02-07 John Zink Company, L.L.C. Venturi cluster, and burners and methods employing such cluster

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3702415C1 (en) * 1987-01-28 1988-04-21 Babcock Werke Ag burner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT234256B (en) * 1962-07-13 1964-06-25 Unitherm Oesterreich Gmbh Pressure atomization burners for liquid fuels
DE1401781A1 (en) * 1961-08-04 1969-03-20 Entpr Generale De Chauffage In Improvements to liquid fuel burners with mechanical atomization and rebound variable delivery to increase the breadth of usable delivery variation
US3667679A (en) * 1969-04-08 1972-06-06 Dumag Ohg Dr Ludwig Kaluza & C Apparatus for mixing a plurality of gaseous streams
EP0043908A1 (en) * 1980-07-16 1982-01-20 Klöckner-Humboldt-Deutz Aktiengesellschaft Spray nozzle for continuous fuel injection
DE2261038C2 (en) * 1971-12-16 1982-07-08 General Electric Co., Schenectady, N.Y. Dual fuel air atomizing fuel nozzle
DE3038063C2 (en) * 1980-10-08 1983-07-28 Braukmann Kessel GmbH, 6966 Seckach Oil burner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2729321C2 (en) * 1977-06-29 1983-10-20 Smit Ovens Nijmegen B.V., Nijmegen Process for the combustion of liquid fuel and burner device for carrying out the process

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1401781A1 (en) * 1961-08-04 1969-03-20 Entpr Generale De Chauffage In Improvements to liquid fuel burners with mechanical atomization and rebound variable delivery to increase the breadth of usable delivery variation
AT234256B (en) * 1962-07-13 1964-06-25 Unitherm Oesterreich Gmbh Pressure atomization burners for liquid fuels
US3667679A (en) * 1969-04-08 1972-06-06 Dumag Ohg Dr Ludwig Kaluza & C Apparatus for mixing a plurality of gaseous streams
DE2261038C2 (en) * 1971-12-16 1982-07-08 General Electric Co., Schenectady, N.Y. Dual fuel air atomizing fuel nozzle
EP0043908A1 (en) * 1980-07-16 1982-01-20 Klöckner-Humboldt-Deutz Aktiengesellschaft Spray nozzle for continuous fuel injection
DE3038063C2 (en) * 1980-10-08 1983-07-28 Braukmann Kessel GmbH, 6966 Seckach Oil burner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002010645A2 (en) * 2000-07-27 2002-02-07 John Zink Company, L.L.C. Venturi cluster, and burners and methods employing such cluster
WO2002010645A3 (en) * 2000-07-27 2002-08-29 John Zink Co Llc Venturi cluster, and burners and methods employing such cluster
US6729874B2 (en) 2000-07-27 2004-05-04 John Zink Company, Llc Venturi cluster, and burners and methods employing such cluster

Also Published As

Publication number Publication date
DE3661106D1 (en) 1988-12-08
DE3526482C1 (en) 1986-12-18
ATE38424T1 (en) 1988-11-15
EP0209631B1 (en) 1988-11-02

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