WO1995005560A1 - Liquid spraying arrangement, in particular heating oil burner - Google Patents

Liquid spraying arrangement, in particular heating oil burner Download PDF

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Publication number
WO1995005560A1
WO1995005560A1 PCT/EP1994/002622 EP9402622W WO9505560A1 WO 1995005560 A1 WO1995005560 A1 WO 1995005560A1 EP 9402622 W EP9402622 W EP 9402622W WO 9505560 A1 WO9505560 A1 WO 9505560A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
expansion body
liquid
crown
wall
Prior art date
Application number
PCT/EP1994/002622
Other languages
German (de)
French (fr)
Inventor
Heinz Baumgart
Helmut Oepen
Josef Langhans
Original Assignee
Henkel Kommanditgesellschaft Auf Aktien
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Henkel Kommanditgesellschaft Auf Aktien filed Critical Henkel Kommanditgesellschaft Auf Aktien
Priority to EP94925438A priority Critical patent/EP0713571A1/en
Publication of WO1995005560A1 publication Critical patent/WO1995005560A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—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
    • F23D11/106—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 at the burner outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0892—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/265—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being symmetrically deflected about the axis of the nozzle

Definitions

  • the invention relates to an atomizing device for liquids, in particular a heating oil burner, with a nozzle, a feed for an atomizing gas, in particular air, a feed for the liquid, in particular heating oil, to the nozzle in which the Atomizer gas and the liquid are miscible before exiting the nozzle.
  • a heating oil burner should produce a flame of a certain shape and certain radiation properties and must atomize the oil stream and mix the oil mist with the combustion air.
  • pressure atomizers in which the operating pressure of the heating oil in the nozzle is converted into kinetic energy
  • injection atomizers are known in particular.
  • the heating oil is atomized in a nozzle with air, gas or steam.
  • the invention relates to the further development of such an atomizer.
  • the heating oil and the atomizing gas emerge into the free space from several small round openings which are arranged in a circle on a nozzle head.
  • the massive individual jets of the heating oil-steam mixture are discharged at high speed and only dissolve into individual droplets after a relatively long distance.
  • the heating oil droplets are only mixed with the surrounding combustion air after a certain time delay.
  • a non-optimal mixing is also the result.
  • the shape of the spray cone can generally be adjusted by tilting the individual bores.
  • seals are also used to seal the supply lines and to the outside. These have the disadvantage that they have to be renewed each time the device is dismantled.
  • the invention is based on the object of enabling an intensive mixing of liquid and atomizing gas in comparison with the prior art even at a low atomizing gas pressure in an injection atomizer of the type mentioned at the outset, so that an almost stoichiometric combustion can be achieved with reduced nitrogen oxide emissions and without touching the flame on the combustion chamber walls.
  • This object is achieved in that a body arranged centrally in the axis of the nozzle (expansion body), which narrows the cross section of the nozzle in the region of the nozzle neck to an annular space, and a hollow-cone-shaped element (crown) with a sawtooth-shaped end are provided , the tooth tips of which lie against the outer wall of the expansion body (cone) and the outer wall of which rests against the inner wall of the nozzle neck, so that an inner annular space provided for supplying the liquid is formed between the expansion body and the crown and an outer one for supply ⁇ tion of the atomizing gas provided annular space is formed between the expansion body and the inner wall of the nozzle ' .
  • the area in which liquid and gas meet has a multi-angled, jagged shape due to the sawtooth-shaped design of the end of the crown and thus brings about an intensive mixing of liquid and atomizing gas even at a low atomizing gas pressure.
  • the liquid flows from inside through triangular openings between the crown and the expansion body into the gaps between the sawtooth tips of the crown.
  • the atomizing gas reaches the same gaps from the outside through corresponding triangular openings between the nozzle and the crown. This is where liquid and gas meet.
  • a further improvement in the mixing of gas and liquid can be achieved in that the hollow-cone-shaped crown with sawtooth-shaped tips at the end of external grooves has triangular passage openings for the liquid on the one hand with the inner expansion body and on the other hand with the outer nozzle in its neck has triangular passage openings for the atomizing gas.
  • the triangular openings for the liquid and for the atomizing gas can be designed differently in shape and size, for. B. by different angles, depths of cut and the choice of the number of sawtooth-shaped tips.
  • expansion body, the crown and the nozzle are conically shaped on the contact surfaces and centered about the central axis.
  • a further contribution to the most complete possible mixing of atomizing gas and liquid droplets is achieved by a tear-off edge on the cone of the expansion body.
  • the tear-off edge promotes the dissolution of the individual liquid-gas mixture flows and improves the mixing with the surrounding combustion air.
  • the diameter of the tear-off edge on the cone of the expansion body relative to the shape and size of the nozzle and the crown influences the diameter and the length of the spray cone produced by the atomizing device.
  • a desired shape and size of the spray cone can thus be set by varying the diameter of the tear-off edge.
  • the crown is pressed by the nozzle connected to a welding neck, in particular screwed without using a soft metal sealing ring, against a stop ring of the welding neck which is connected to a casing tube which serves to supply the atomizing gas.
  • the expansion body be screwed to an inner tube serving to supply the liquid, in particular without using a soft metal sealing ring.
  • a particularly important advantage of the atomizing device according to the invention is the small excess of combustion air that is possible here, which enables firing operation with reduced nitrogen oxide emissions.
  • FIG. 1 shows a longitudinal section through an atomizing device according to the invention in the assembled state
  • FIG. 2 shows the nozzle of the atomizer of FIG. 1 in side view
  • FIG. 3 shows the welding sleeve used for the atomizer according to FIG. 1 in longitudinal section, shown separately for the sake of clarity,
  • FIG. 5 shows a side view of the crown used in the atomizer according to FIG. 1,
  • FIG. 6 is a plan view of the crown of FIG. 5 along the axis
  • FIG. 8 shows a side view of the expansion body used in the atomizer according to FIG. 1.
  • a casing tube 11 consists of a casing tube 11, a pre-welded sleeve 9 and a nozzle 1 screwed therein.
  • Heating oil is supplied via an inner pipe 13 and heating oil is supplied via the outer annular space between the inner pipe 13 and the casing pipe 11 or the welding sleeve 9 is supplied with air to the nozzle.
  • an expansion body 3 With the inner tube 13, an expansion body 3 is screwed with its thread 12. The oil is brought in via a central channel within the expansion body 3.
  • a tubular body 2 Between the expansion body 3 and the nozzle 1 is a tubular body 2, the so-called crown, which is supported with the front, tapered and sawtooth-shaped tips 4 on the cone 6 of the expansion body and with the other end on a stop ring 8 of the welding sleeve 9.
  • air flows in the annular space between the inner tube 13 and the casing tube 11, through bores in the stop ring 8 of the welding sleeve 9 into the annular space between the inner wall of the nozzle 1 and the outer wall of the crown 2.
  • the air hits the heating oil.
  • the oil flows through the central cavity in the inner tube 13 and in the expansion body 3 and passes through an opening 16 in the expansion body 3, which is shown more clearly in FIG. 8, into an annular space between the outer wall of the expansion body 3 and the inner wall of the crown 2 then flow between the sawtooth-shaped tips 4 of the crown 2 and mix with the air.
  • the mixture then flows through the conical annular space between the nozzle 1 and the conical end of the expansion body 3 over the tear-off edge 7 to the outside.
  • Fig. 2 shows a view of the nozzle 1, which carries a thread 10 for screwing into the welding sleeve 9.
  • the nozzle-shaped narrowing is shown in dashed lines.
  • the stop ring 8 of the welding sleeve 9 and the thread 10 are particularly clearly shown.
  • the nozzle 1 can be screwed into the internal thread 10.
  • FIG. 5 shows a view of the crown with the tooth-toothed tips 4, which are shown particularly clearly in FIG. 7.
  • the grooves 14 with a triangular cross-section, which are used to feed and swirl the atomizing air.
  • an angle of 60 ° between the side walls of the grooves 14 is particularly preferred.
  • the crown 2 is also shown in a view looking along the axis (Fig. 6).
  • Fig. 8 shows a view of the expansion body 3 with the hollow shaft 5, the thread 12 for screwing into the inner tube 13 and the opening 16 for the heating oil.
  • the outward-pointing end of the expansion body 3 which is arranged within the widening opening of the nozzle is in the form of a cone 6 and a subsequent cylindrical section. In between is a tear-off edge 7, which is particularly advantageous for the strong swirling of heating oil, atomizing air and the external combustion air.

Abstract

A spraying arrangement has a nozzle (1), a spraying gas supply means (11) and a liquid supply means (13) to the nozzle (1) in which the spraying gas and the liquid may be mixed before leaving the nozzle. In addition, a body (3) is centrally arranged in the axis of the nozzle (1), narrowing the cross section of the nozzle (1) in the area of the nozzle neck (15) to a ring-shaped space. The points (4) of the teeth of an element shaped as a hollow cone and having a saw-toothed end lie on the outer wall of the spreading body (3). The outer wall of the crown (2) lies on the inner wall of the nozzle neck (15), creating an inner ring-shaped space through which liquid is supplied between the spreading body (3) and the crown (2), as well as an outer ring-shaped space through which the spraying gas is supplied between the spreading body (3) and the inner wall of the nozzle (1). This low-priced, technically simple modification allows the liquid and spraying gas to be intensively mixed even at a low spraying gas pressure. A quasi-stoichiometric combustion with a reduced nitrogen oxide emission is achieved without causing the flames to touch the walls of the furnace.

Description

"Zerstäubunqseinrichtuno für Flüssigkeiten, insbesondere Heizöl-Brenner""Atomization device for liquids, especially heating oil burners"
Die Erfindung bezieht sich auf eine Zerstäubungseinrichtung für Flüssig¬ keiten, insbesondere auf einen Heizöl-Brenner, mit einer Düse, einer Zu¬ führung für ein Zerstäubergas, insbesondere Luft, einer Zuführung für die Flüssigkeit, insbesondere Heizöl, zu der Düse, in der das Zerstäubergas und die Flüssigkeit vor dem Austreten aus der Düse mischbar sind.The invention relates to an atomizing device for liquids, in particular a heating oil burner, with a nozzle, a feed for an atomizing gas, in particular air, a feed for the liquid, in particular heating oil, to the nozzle in which the Atomizer gas and the liquid are miscible before exiting the nozzle.
Ein Heizöl-Brenner soll eine Flamme von bestimmter Form und bestimmten Strahlungseigenschaften erzeugen und muß dazu den Ölstro zerstäuben und den Ölnebel mit der Verbrennungsluft mischen. Neben Druckzerstäubern, in denen der Betriebsdruck des Heizöls in der Düse in kinetische Energie um¬ gewandelt wird, und anderen Zerstäuberarten sind insbesondere Injektions¬ zerstäuber bekannt. Hier wird das Heizöl in einer Düse mit Luft, Gas oder Dampf zerstäubt. Die Erfindung betrifft die Weiterentwicklung eines der¬ artigen Zerstäubers.A heating oil burner should produce a flame of a certain shape and certain radiation properties and must atomize the oil stream and mix the oil mist with the combustion air. In addition to pressure atomizers, in which the operating pressure of the heating oil in the nozzle is converted into kinetic energy, and other types of atomizers, injection atomizers are known in particular. Here the heating oil is atomized in a nozzle with air, gas or steam. The invention relates to the further development of such an atomizer.
In bekannten Zerstäubungseinrichtungen für Heizöl treten das Heizöl und das Zerstäubergas, in der Regel Dampf mit hohem Druck, aus mehreren kleinen runden Öffnungen, die kreisförmig auf einem Düsenkopf angeordnet sind, in den freien Raum aus. Die massiven Einzelstrahlen des Heizöl- Dampf-Gemisches werden mit hoher Geschwindigkeit ausgetragen und lösen sich erst nach einer relativ langen Strecke in einzelne Tröpfchen auf. Erst nach einer gewissen zeitlichen Verzögerung werden die Heizöltröpfchen mit der umgebenden Verbrennungsluft gemischt. Eine nicht optimale Vermi¬ schung ist außerdem die Folge. Die Form des Sprühkegels kann im allge¬ meinen durch Schrägstellung der einzelnen Bohrungen eingestellt werden. Im allgemeinen werden auch Dichtungen benutzt, die die Abdichtung auf den Zuführungsleitungen und nach außen bewirken. Diese haben den Nachteil, daß sie bei jedem Zerlegen der Einrichtung erneuert werden müssen. Der Erfindung liegt die Aufgabe zugrunde, bei einem Injektionszerstäuber der eingangs genannten Art durch eine preiswerte, wenig aufwendige Abän¬ derung eine intensive Vermischung von Flüssigkeit und Zerstäubergas ge¬ genüber dem Stand der Technik schon bei niedrigem Zerstäubergasdruck zu ermöglichen, so daß eine nahezu stöchiometrische Verbrennung mit vermin¬ derter Stickstoffoxidemission und ohne Flammenberührung an den Feuerraum¬ wänden erreicht werden kann.In known atomizing devices for heating oil, the heating oil and the atomizing gas, as a rule steam with high pressure, emerge into the free space from several small round openings which are arranged in a circle on a nozzle head. The massive individual jets of the heating oil-steam mixture are discharged at high speed and only dissolve into individual droplets after a relatively long distance. The heating oil droplets are only mixed with the surrounding combustion air after a certain time delay. A non-optimal mixing is also the result. The shape of the spray cone can generally be adjusted by tilting the individual bores. In general, seals are also used to seal the supply lines and to the outside. These have the disadvantage that they have to be renewed each time the device is dismantled. The invention is based on the object of enabling an intensive mixing of liquid and atomizing gas in comparison with the prior art even at a low atomizing gas pressure in an injection atomizer of the type mentioned at the outset, so that an almost stoichiometric combustion can be achieved with reduced nitrogen oxide emissions and without touching the flame on the combustion chamber walls.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß ein zentral in der Achse der Düse angeordneter Körper (Spreizkörper), der den Querschnitt der Düse im Bereich des Düsenhalses zu einem Ringraum verengt, und ein hohl- konusförmiges Element (Krone) mit einem sägezahnförmigen Ende vorgesehen sind, dessen Zahnspitzen an der Außenwand des Spreizkörpers (Konus) an¬ liegen und dessen Außenwand an der Innenwand des Düsenhalses anliegt, so daß ein innerer, zur Zuführung der Flüssigkeit vorgesehener Ringraum zwi¬ schen dem Spreizkörper und der Krone entsteht und ein äußerer, zur Zufüh¬ rung des Zerstäubergases vorgesehener Ringraum zwischen dem Spreizkörper und der Innenwand der Düse gebildet' wird. Erfindungsgemäß weist der Be¬ reich, in dem Flüssigkeit und Gas zusammentreffen, eine vielwinkelige, zerklüftete Gestalt infolge der sägezahnförmigen Ausbildung des Endes der Krone auf und bewirkt so eine intensive Vermischung von Flüssigkeit und Zerstäubergas schon bei niedrigem Zerstäubergasdruck. Die Flüssigkeit strömt durch dreieckige Öffnungen zwischen der Krone und dem Spreizkörper von innen in die Lücken zwischen den Sägezahnspitzen der Krone. Das Zer¬ stäubergas gelangt durch entsprechende dreieckige Öffnungen zwischen der Düse und der Krone von außen in dieselben Lücken. Hier treffen Flüssigkeit und Gas aufeinander.This object is achieved in that a body arranged centrally in the axis of the nozzle (expansion body), which narrows the cross section of the nozzle in the region of the nozzle neck to an annular space, and a hollow-cone-shaped element (crown) with a sawtooth-shaped end are provided , the tooth tips of which lie against the outer wall of the expansion body (cone) and the outer wall of which rests against the inner wall of the nozzle neck, so that an inner annular space provided for supplying the liquid is formed between the expansion body and the crown and an outer one for supply ¬ tion of the atomizing gas provided annular space is formed between the expansion body and the inner wall of the nozzle ' . According to the invention, the area in which liquid and gas meet has a multi-angled, jagged shape due to the sawtooth-shaped design of the end of the crown and thus brings about an intensive mixing of liquid and atomizing gas even at a low atomizing gas pressure. The liquid flows from inside through triangular openings between the crown and the expansion body into the gaps between the sawtooth tips of the crown. The atomizing gas reaches the same gaps from the outside through corresponding triangular openings between the nozzle and the crown. This is where liquid and gas meet.
Eine weitere Verbesserung der Vermischung von Gas und Flüssigkeit kann dadurch erreicht werden, daß die hohlkonusför ige Krone mit sägezahn¬ förmigen Spitzen am Ende von außenliegenden Nuten einerseits mit dem in¬ neren Spreizkörper dreieckige Durchtrittsöffnungen für die Flüssigkeit und andererseits mit der äußeren Düse in deren Hals dreieckige Durchtritts¬ öffnungen für das Zerstäubergas aufweist. Die dreieckigen Öffnungen für die Flüssigkeit und für das Zerstäubergas sind unterschiedlich in Form und Größe gestaltbar, z. B. durch unter¬ schiedliche Winkel, Einschnittiefen und der Wahl der Anzahl der sägezahn¬ förmigen Spitzen.A further improvement in the mixing of gas and liquid can be achieved in that the hollow-cone-shaped crown with sawtooth-shaped tips at the end of external grooves has triangular passage openings for the liquid on the one hand with the inner expansion body and on the other hand with the outer nozzle in its neck has triangular passage openings for the atomizing gas. The triangular openings for the liquid and for the atomizing gas can be designed differently in shape and size, for. B. by different angles, depths of cut and the choice of the number of sawtooth-shaped tips.
Außerdem besteht eine weitere vorteilhafte Ausführungsform der Erfindung darin, daß der Spreizkörper, die Krone und die Düse an den Berührungsflä¬ chen konisch geformt und um die Mittelachse zentriert sind.In addition, a further advantageous embodiment of the invention is that the expansion body, the crown and the nozzle are conically shaped on the contact surfaces and centered about the central axis.
Ein weiterer Beitrag zur möglichst vollständigen Vermischung von Zerstäu¬ bergas und Flüssigkeitströpfchen wird durch eine Abreißkante am Konus des Spreizkörpers erreicht. Die Abreißkante begünstigt die Auflösung der ein¬ zelnen Flüssigkeits-Gas-Gemischströme und verbessert die Vermischung mit der umgebenden Verbrennungsluft.A further contribution to the most complete possible mixing of atomizing gas and liquid droplets is achieved by a tear-off edge on the cone of the expansion body. The tear-off edge promotes the dissolution of the individual liquid-gas mixture flows and improves the mixing with the surrounding combustion air.
Der Durchmesser der Abreißkante am Konus des Spreizkörpers relativ zur Form und Größe der Düse und der Krone beeinflußt den Durchmesser und die Länge des durch die Zerstäubereinrichtung erzeugten Sprühkegels. Eine ge¬ wünschte Form und Größe des Sprühkegels kann also durch Variation des Durchmessers der Abreißkante eingestellt werden. Weiterhin ist es vor¬ teilhaft, daß die Krone von der mit einer Vorschweißhülse verbundenen, insbesondere ohne Verwendung eines Weich etall-Dichtungsrings ver¬ schraubten Düse gegen einen Anschlagring der Vorschweißhülse gedrückt wird, die mit einem Mantelrohr verbunden ist, das der Zerstäubergaszufuhr dient. Schließlich wird noch vorgeschlagen, daß der Spreizkörper mit einem zur Zuführung der Flüssigkeit dienenden Innenrohr verbunden, insbesondere ohne Verwendung eines Weichmetall-Dichtungsrings verschraubt ist.The diameter of the tear-off edge on the cone of the expansion body relative to the shape and size of the nozzle and the crown influences the diameter and the length of the spray cone produced by the atomizing device. A desired shape and size of the spray cone can thus be set by varying the diameter of the tear-off edge. Furthermore, it is advantageous that the crown is pressed by the nozzle connected to a welding neck, in particular screwed without using a soft metal sealing ring, against a stop ring of the welding neck which is connected to a casing tube which serves to supply the atomizing gas. Finally, it is also proposed that the expansion body be screwed to an inner tube serving to supply the liquid, in particular without using a soft metal sealing ring.
Als besonders wichtiger Vorteil der erfindungsgemäßen Zerstäubungsein¬ richtung soll der geringe hier mögliche Verbrennungs-Luftüberschuß genannt werden, der einen Feuerungsbetrieb mit verminderter Stickstoffoxidemission ermöglicht.A particularly important advantage of the atomizing device according to the invention is the small excess of combustion air that is possible here, which enables firing operation with reduced nitrogen oxide emissions.
Ein Ausführungsbeispiel einer erfindungsgemäßen Zerstäubungseinrichtung, die in Testversuchen bei einem Vordruck von 18 bar und einem Preßluftdruck von 4 bar zur Zerstäubung von Heizöl EL (sogenanntem leichten Heizöl) eingesetzt worden ist, wird im folgenden anhand der Zeichnungen näher be¬ schrieben.An embodiment of an atomization device according to the invention, which in test trials with a pre-pressure of 18 bar and a compressed air pressure of 4 bar for the atomization of heating oil EL (so-called light heating oil) has been used, is described in more detail below with reference to the drawings.
Es zeigenShow it
Fig. 1 einen Längsschnitt durch eine erfindungsgemäße Zerstäubungsein¬ richtung in montiertem Zustand,1 shows a longitudinal section through an atomizing device according to the invention in the assembled state,
Fig. 2 die Düse des Zerstäubers nach Fig. 1 in Seitenansicht,2 shows the nozzle of the atomizer of FIG. 1 in side view,
Fig. 3 die für den Zerstäuber nach Fig. 1 benutzte Vorschweißhülse im Längsschnitt, der Übersichtlichkeit halber separat dargestellt,3 shows the welding sleeve used for the atomizer according to FIG. 1 in longitudinal section, shown separately for the sake of clarity,
Fig. 4 den in der Vorschweißhülse befindlichen Anschlagring,4 the stop ring located in the welding sleeve,
Fig. 5 eine seitliche Ansicht der beim Zerstäuber nach Fig. 1 verwen¬ deten Krone,5 shows a side view of the crown used in the atomizer according to FIG. 1,
Fig. 6 eine Draufsicht auf die Krone nach Fig. 5 längs der Achse,6 is a plan view of the crown of FIG. 5 along the axis,
Fig. 7 die Einzelheit "X" aus Fig. 5,7 shows the detail "X" from FIG. 5,
Fig. 8 eine Ansicht des beim Zerstäuber nach Fig. 1 verwendeten Spreiz¬ körpers in Seitenansicht.8 shows a side view of the expansion body used in the atomizer according to FIG. 1.
Der Zerstäuber nach Fig. 1 besteht aus einem Mantelrohr 11, einer vorge¬ schweißten Hülse 9 und einer darin eingeschraubten Düse 1. Über ein In¬ nenrohr 13 wird Heizöl und über den äußeren Ringraum zwischen dem Innen¬ rohr 13 und dem Mantelrohr 11 bzw. der Vorschweißhülse 9 wird Luft zur Düse zugeführt. Mit dem Innenrohr 13 ist ein Spreizkörper 3 mit seinem Gewinde 12 verschraubt. Über einen zentralen Kanal innerhalb des Spreiz¬ körpers 3 wird das Öl herangeführt. Zwischen dem Spreizkörper 3 und der Düse 1 ist ein rohrförmiger Körper 2, die sogenannte Krone eingesetzt, die sich mit den vorderen, konusförmig zulaufenden und sägezahnförmigen Spitzen 4 am Konus 6 des Spreizkörpers und mit dem anderen Ende an einem Anschlagring 8 der Vorschweißhülse 9 abstützt. Im Betrieb strömt Luft im ringförmigen Raum zwischen Innenrohr 13 und Mantelrohr 11, durch Bohrungen im Anschlagring 8 der Vorschweißhülse 9 in den Ringraum zwischen Innenwand der Düse 1 und Außenwand der Krone 2. Im Bereich des Düsenhalses 15 trifft die Luft auf das Heizöl. Das Öl strömt durch den zentralen Hohlraum im Innenrohr 13 und im Spreizkörper 3 und tritt durch eine Öffnung 16 im Spreizkörper 3, die in Fig. 8 deutlicher dargestellt ist, in einen Ringraum zwischen der Außenwand des Spreizkör¬ pers 3 und der Innenwand der Krone 2 ein, um dann zwischen die sägezahnförmigen Spitzen 4 der Krone 2 zu strömen und sich mit der Luft zu vermischen. Das Gemisch strömt dann durch den kegelförmigen Ringraum zwi¬ schen Düse 1 und konusförmigem Ende des Spreizkörpers 3 über die Abrei߬ kante 7 nach außen.1 consists of a casing tube 11, a pre-welded sleeve 9 and a nozzle 1 screwed therein. Heating oil is supplied via an inner pipe 13 and heating oil is supplied via the outer annular space between the inner pipe 13 and the casing pipe 11 or the welding sleeve 9 is supplied with air to the nozzle. With the inner tube 13, an expansion body 3 is screwed with its thread 12. The oil is brought in via a central channel within the expansion body 3. Between the expansion body 3 and the nozzle 1 is a tubular body 2, the so-called crown, which is supported with the front, tapered and sawtooth-shaped tips 4 on the cone 6 of the expansion body and with the other end on a stop ring 8 of the welding sleeve 9. In operation, air flows in the annular space between the inner tube 13 and the casing tube 11, through bores in the stop ring 8 of the welding sleeve 9 into the annular space between the inner wall of the nozzle 1 and the outer wall of the crown 2. In the area of the nozzle neck 15, the air hits the heating oil. The oil flows through the central cavity in the inner tube 13 and in the expansion body 3 and passes through an opening 16 in the expansion body 3, which is shown more clearly in FIG. 8, into an annular space between the outer wall of the expansion body 3 and the inner wall of the crown 2 then flow between the sawtooth-shaped tips 4 of the crown 2 and mix with the air. The mixture then flows through the conical annular space between the nozzle 1 and the conical end of the expansion body 3 over the tear-off edge 7 to the outside.
Fig. 2 zeigt eine Ansicht der Düse 1, die ein Gewinde 10 zum Anschrauben in die Vorschweißhülse 9 trägt. Die düsenförmige Verengung ist gestrichelt dargestellt.Fig. 2 shows a view of the nozzle 1, which carries a thread 10 for screwing into the welding sleeve 9. The nozzle-shaped narrowing is shown in dashed lines.
Im Schnitt nach Fig. 3 und in der Ansicht in Fig. 4 sind der Anschlagring 8 der Vorschweißhülse 9, sowie das Gewinde 10 besonders deutlich darge¬ stellt. In das Innengewinde 10 kann die Düse 1 eingeschraubt werden.In the section according to FIG. 3 and in the view in FIG. 4, the stop ring 8 of the welding sleeve 9 and the thread 10 are particularly clearly shown. The nozzle 1 can be screwed into the internal thread 10.
Fig. 5 zeigt eine Ansicht der Krone mit den zägezahnför igen Spitzen 4, die in Fig. 7 besonders deutlich dargestellt sind. Hier erkennt man au¬ ßerdem sehr deutlich die Nuten 14 mit dreieckigem Querschnitt, die zur Zuleitung und Verwirbelung der Zerstäuberluft dienen. Wie in Fig. 5 ferner dargestellt ist, ist ein Winkel von 60° zwischen den Seitenwänden der Nu¬ ten 14 besonders bevorzugt. Die Krone 2 ist außerdem in einer Ansicht mit Blickrichtung längs der Achse dargestellt (Fig. 6).FIG. 5 shows a view of the crown with the tooth-toothed tips 4, which are shown particularly clearly in FIG. 7. Here you can also clearly see the grooves 14 with a triangular cross-section, which are used to feed and swirl the atomizing air. As is also shown in FIG. 5, an angle of 60 ° between the side walls of the grooves 14 is particularly preferred. The crown 2 is also shown in a view looking along the axis (Fig. 6).
Fig. 8 zeigt eine Ansicht des Spreizkörpers 3 mit dem hohlen Schaft 5, dem Gewinde 12 zum Einschrauben in das Innenrohr 13 und der Öffnung 16 für das Heizöl. Das nach außen weisende und innerhalb der sich aufweitenden Öff¬ nung der Düse angeordnete Ende des Spreizkörpers 3 ist in Form eines Konus 6 und einer anschließenden zylindrischen Partie ausgebildet. Dazwischen liegt eine Abreißkante 7, die zur starken Verwirbelung von Heizöl, Zer¬ stäuberluft und der äußeren Verbrennungsluft besonders vorteilhaft ist. B e z u g s z e i c h e n l i s t eFig. 8 shows a view of the expansion body 3 with the hollow shaft 5, the thread 12 for screwing into the inner tube 13 and the opening 16 for the heating oil. The outward-pointing end of the expansion body 3 which is arranged within the widening opening of the nozzle is in the form of a cone 6 and a subsequent cylindrical section. In between is a tear-off edge 7, which is particularly advantageous for the strong swirling of heating oil, atomizing air and the external combustion air. List of reference symbols
Düsejet
KroneCrown
SpreizkörperSpreader
Spitzensharpen
Schaftshaft
Konuscone
AbreißkanteTear-off edge
AnschlagringStop ring
VorschweißhülseWelding sleeve
Gewindethread
MantelrohrCasing pipe
Gewindethread
InnenrohrInner tube
NutenGrooves
DüsenhalsNozzle neck
Öffnung opening

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Zerstäubungseinrichtung für Flüssigkeiten, insbesondere Heizöl-Bren¬ ner, mit einer Düse (1), einer Zuführung (11) für ein Zerstäubergas, insbesondere Luft, einer Zuführung (13) für die Flüssigkeit, insbe¬ sondere Heizöl, zu der Düse (1), in der das Zerstäubergas und die Flüssigkeit vor dem Austreten aus der Düse (1) mischbar sind, g e k e n n z e i c h n e t d u r c h einen zentral in der Achse der Düse (1) angeordneten Körper (3) (Spreizkörper), der den Querschnitt der Düse (1) im Bereich des Dü¬ senhalses (15) zu einem Ringraum verengt, ein hohlkonusförmiges Ele¬ ment (2) (Krone) mit einem sägezahnförmigen Ende, dessen Zahnspitzen (4) an der Außenwand des Spreizkörpers (3) (Konus) anliegen und des¬ sen Außenwand an der Innenwand des Düsenhalses (15) anliegt, so daß ein innerer, zur Zuführung der Flüssigkeit vorgesehener Ringraum zwischen dem Spreizkörper (3) und der Krone (2) entsteht und ein äu¬ ßerer, zur Zuführung des Zerstäubergases vorgesehener Ringraum zwi¬ schen dem Spreizkörper (3) und der Innenwand der Düse (1) gebildet wird.1. Atomizing device for liquids, in particular heating oil burner, with a nozzle (1), a feed (11) for an atomizing gas, in particular air, a feed (13) for the liquid, in particular heating oil, to the nozzle ( 1), in which the atomizing gas and the liquid are miscible before emerging from the nozzle (1), characterized by a body (3) (expansion body) which is arranged centrally in the axis of the nozzle (1) and which has the cross section of the nozzle (1) in the area of the nozzle neck (15) narrows to form an annular space, a hollow cone-shaped element (2) (crown) with a sawtooth-shaped end, the tooth tips (4) of which lie against the outer wall of the expansion body (3) (cone), and des¬ sen outer wall rests on the inner wall of the nozzle neck (15), so that an inner annular space provided for supplying the liquid is formed between the expansion body (3) and the crown (2) and an outer one for supplying the atomizing gas v The annular space provided is formed between the expansion body (3) and the inner wall of the nozzle (1).
2. Vorrichtung gemäß Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die hohlkonusförmige Krone (2) mit sägezahnförmigen Spitzen (4) am Ende von außenliegenden Nuten (14) einerseits mit dem inneren Spreizkörper (3) dreieckige Durchtrittsöffnungen für die Flüssigkeit und andererseits mit der äußeren Düse (1) in deren Hals (15) dreiek- kige Durchtrittsöffnungen für das Zerstäubergas aufweist.2. Device according to claim 1, characterized in that the hollow cone-shaped crown (2) with sawtooth-shaped tips (4) at the end of external grooves (14) on the one hand with the inner expansion body (3) triangular passage openings for the liquid and on the other hand with the outer nozzle ( 1) has triangular passage openings for the atomizing gas in its neck (15).
3. Zerstäubungseinrichtung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß der Spreizkörper (3), die Krone (2) und die Düse (1) an den Be¬ rührungsflächen konisch geformt und um die Mittelachse zentriert sind. 3. Atomizing device according to claim 1 or 2, characterized in that the expansion body (3), the crown (2) and the nozzle (1) on the Be¬ contact surfaces are conically shaped and centered about the central axis.
4. Zerstäubungseinrichtung nach Anspruch 3, g e k e n n z e i c h n e t d u r c h eine Abreißkante (7) am Konus (6) des Spreizkörpers (3).4. The atomizing device according to claim 3, has a tear-off edge (7) on the cone (6) of the expansion body (3).
5. Zerstäubungseinrichtung nach einem der Ansprüche 1 bis 4, g e k e n n z e i c h n e t d u r c h einen zur Zuführung der Flüssigkeit vorgesehenen zentralen Hohlraum im Spreizkörper (3), der über die Öffnung (16) mit dem inneren Ring¬ raum zwischen dem Spreizkörper (3) und der Krone (2) verbunden ist.5. Atomizing device according to one of claims 1 to 4, characterized by a central cavity provided for supplying the liquid in the expansion body (3), which via the opening (16) with the inner annular space between the expansion body (3) and the crown (2nd ) connected is.
6. Zerstäubungseinrichtung nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , daß die Krone (2) von der mit einer Vorschweißhülse (9) verbundenen, insbesondere ohne Verwendung eines Weichmetall-Dichtungsrings ver¬ schraubten Düse (1) gegen einen Anschlagring (8) der Vorschweißhülse (9) gedrückt wird, die mit einem Mantelrohr (11), das der Zerstäu¬ bergaszufuhr dient, verbunden ist.6. Atomizing device according to one of claims 1 to 5, characterized in that the crown (2) of the nozzle (1) connected to a welding sleeve (9), in particular without using a soft metal sealing ring, is screwed against a stop ring (8) Welding sleeve (9) is pressed, which is connected to a casing tube (11), which is used to supply the atomizing gas.
7. Zerstäubungseinrichtung nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t , daß der Spreizkörper (3) mit einem zur Zuführung der Flüssigkeit dienenden Innenrohr (13) verbunden, insbesondere ohne Verwendung ei¬ nes Weichmetall-Dichtungsrings verschraubt ist. 7. Atomizing device according to one of claims 1 to 6, d a d u r c h g e k e n n z e i c h n e t that the expansion body (3) with an inner tube (13) serving to supply the liquid is screwed, in particular without using a soft metal sealing ring.
PCT/EP1994/002622 1993-08-16 1994-08-08 Liquid spraying arrangement, in particular heating oil burner WO1995005560A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94925438A EP0713571A1 (en) 1993-08-16 1994-08-08 Liquid spraying arrangement, in particular heating oil burner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4327456.0 1993-08-16
DE19934327456 DE4327456A1 (en) 1993-08-16 1993-08-16 Atomizing device for liquids, in particular heating oil burners

Publications (1)

Publication Number Publication Date
WO1995005560A1 true WO1995005560A1 (en) 1995-02-23

Family

ID=6495271

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/002622 WO1995005560A1 (en) 1993-08-16 1994-08-08 Liquid spraying arrangement, in particular heating oil burner

Country Status (3)

Country Link
EP (1) EP0713571A1 (en)
DE (1) DE4327456A1 (en)
WO (1) WO1995005560A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002002990A1 (en) * 1999-02-23 2002-01-10 Federal State Unitary Enterprise Chemical Automatic Design Bureau (Cadb) Coaxial spray nozzle injector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3007801B1 (en) * 2013-07-01 2018-01-05 Arianegroup Sas INJECTION ELEMENT

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR711140A (en) * 1930-05-14 1931-09-04 Improvement in liquid fuel burners
US2511755A (en) * 1947-07-01 1950-06-13 Hauck Mfg Co Atomizing burner for fluid fuels
US2945629A (en) * 1958-05-12 1960-07-19 Chrysler Corp Fuel injection nozzle for a gas turbine engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR711140A (en) * 1930-05-14 1931-09-04 Improvement in liquid fuel burners
US2511755A (en) * 1947-07-01 1950-06-13 Hauck Mfg Co Atomizing burner for fluid fuels
US2945629A (en) * 1958-05-12 1960-07-19 Chrysler Corp Fuel injection nozzle for a gas turbine engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002002990A1 (en) * 1999-02-23 2002-01-10 Federal State Unitary Enterprise Chemical Automatic Design Bureau (Cadb) Coaxial spray nozzle injector
US7137254B1 (en) 2000-07-05 2006-11-21 Federal State Unitary Enterprise Chemical Automatic Design Bureau (Cadb) Coaxial spray nozzle injector

Also Published As

Publication number Publication date
EP0713571A1 (en) 1996-05-29
DE4327456A1 (en) 1995-02-23

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