EP1489352B1 - Mixing Device for an Oil- or Gasburner - Google Patents

Mixing Device for an Oil- or Gasburner Download PDF

Info

Publication number
EP1489352B1
EP1489352B1 EP04013442.1A EP04013442A EP1489352B1 EP 1489352 B1 EP1489352 B1 EP 1489352B1 EP 04013442 A EP04013442 A EP 04013442A EP 1489352 B1 EP1489352 B1 EP 1489352B1
Authority
EP
European Patent Office
Prior art keywords
combustion air
mixing device
orifice plate
chamber
housing
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.)
Not-in-force
Application number
EP04013442.1A
Other languages
German (de)
French (fr)
Other versions
EP1489352A1 (en
Inventor
Thomas Enzian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1489352A1 publication Critical patent/EP1489352A1/en
Application granted granted Critical
Publication of EP1489352B1 publication Critical patent/EP1489352B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; Burner heads
    • F23D11/408—Flow influencing devices in the air tube
    • 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
    • F23D11/001—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space spraying nozzle combined with forced draft fan in one unit
    • 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
    • F23D2900/11401—Flame intercepting baffles forming part of burner head
    • 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
    • F23D2900/11403—Flame surrounding tubes in front of burner nozzle

Definitions

  • the invention relates to a mixing device for an oil or gas burner according to the preamble of claim 1.
  • a generic burner is for example from the EP 0 558 455 A1 known.
  • the burner consists of a burner housing with a chamber arranged in the latter and a flame tube connected thereto.
  • the air enters the chamber radially from the housing and is displaced by vanes in a helical circulation.
  • a nozzle with a fuel jet generating nozzle is arranged, and in the flame tube, the fuel jet spreads.
  • a diaphragm Between the chamber and the combustion chamber is a diaphragm with a central opening through which the fuel jet passes. With a blower entering the combustion chamber combustion air flow is generated.
  • the burner from the EP 0 683 883 B1 consists of a burner housing, which has a support tube with an arranged in this prechamber and an adjoining flame tube.
  • a nozzle with a fuel jet nozzle is arranged in the prechamber, and in the flame tube, the fuel jet spreads.
  • a diaphragm with a central opening through which the fuel jet passes is generated. This includes a partial stream close to the fuel jet and a recirculation-stabilizing partial flow.
  • the radially outer recirculation-stabilizing partial flow has the shape of a flow pattern corresponding to an annular flow interrupted in the circumferential direction, so that an inner recirculation flow running back from the blue-burning flame to the non-combusting part of the fuel jet is formed in the combustion chamber.
  • the recirculation-stabilizing partial flow of the combustion air stabilizes the inner recirculation flow.
  • the disclosure DE 199 48 876 A1 a method for providing a homogeneous combustion air flow by changing the structure.
  • the air flow is pressed by the impeller of a fan in the spiral channel of the blower housing and passed therefrom in an approximately rectangular deflection in a laterally arranged burner housing.
  • the combustion air flows through air holes in a distributor element in the combustion zone of a fan burner.
  • this arrangement may adversely affect combustion quality and flame stability because of turbulence. These reach up to the aperture and / or the incoming combustion air occurs unevenly through the mantle of the calming element.
  • a combustion device for soot-free burning of liquid fuels is additionally known in which the air flowing through the air duct can be regulated by means of an axially adjustable, cylindrical gasifier head.
  • This is mounted in the region of a spray nozzle and has on its jacket individual incorporated through openings for a first partial flow of the combustion air.
  • the carburetor head together with the air duct at the height of the nozzle opening forms a throttle point for the amount of air to be supplied in the form of a partial flow, which flows directly from the air duct into the combustion zone.
  • the invention has for its object to provide a compact constructed mixing device for an oil or gas burner and to optimize its combustion quality and robustness in different operating conditions.
  • the mixing device for an oil or gas burner is characterized in that upstream of the orifice, between the orifice and the nozzle, a chamber is formed with a homogenizing element with finely distributed passages for the combustion air flow.
  • the combustion air flow from the housing enters radially and thus passes evenly from all sides to the flow openings in the diaphragm.
  • the cylindrical homogenizing element abuts in the axial direction both on the diaphragm and on a closed boundary wall on the side of the nozzle block.
  • a perforated plate forms the cylindrical homogenizing element.
  • the boundary wall of the chamber on the side of the nozzle assembly is placed on this and the holding devices for the diaphragm, which may be attached to the boundary wall or directly on the nozzle, are arranged within the homogenizing element.
  • the depth of the cylindrical homogenization element or the distance between the diaphragm and the boundary wall corresponds approximately to half the diameter of the diaphragm.
  • the panel may be attached directly to the boundary wall via the homogenizing element. Additional holding devices can then be omitted.
  • the boundary wall is extended on the side of the nozzle assembly to the wall of the housing and provided outside in the region of the annular gap with passage openings for the combustion air flow, the total cross-sections are preferably selected to be greater than the total cross sections of all passage openings on the equalization.
  • flow guide elements for example ribs, can generally be arranged in the outlet region of the combustion air channel and / or on the inside of the wall of the housing.
  • a plurality of cylindrical homogenizing elements with different diameters, and with respectively different or identical cross sections or arrangements of the individual passage openings for the combustion air flow, are arranged one above the other at a small distance. These are associated with each other and ensure multiple equalization of the radially entering the chamber at the aperture combustion air.
  • the cross sections of the passage openings for the combustion air flow on the jacket of a homogenizing element can vary as needed. In this case, smaller cross sections are preferably present in the vicinity of the aperture.
  • a compact constructed mixing device for an oil or gas burner is created and its combustion quality and Robustness optimized in different operating conditions.
  • blowers with a combustion air duct which is aligned approximately at right angles to the axis of the mixing device and the combustion air flow does not flow in the axial direction in the housing upstream of the aperture, a uniform, possible low turbulence flow of the aperture is guaranteed.
  • expensive distribution and calming devices in the discharge area of the combustion air duct can be omitted.
  • the drawing illustrates an embodiment of the invention and shows in a single figure a vertical longitudinal section through a mixing device of an oil or gas burner.
  • the mixing device consists of a flame tube 1, which surrounds a combustion chamber 2, in which a fuel jet from a fuel nozzle 3 propagates. This is upstream of the combustion chamber 2, shortly behind a diaphragm 4 with flow openings 5 for the combustion air, mounted on a so-called nozzle 6.
  • the combustion air flow is generated. It opens via a combustion air duct 7 approximately at right angles to the axis of the mixing device in a housing 8 upstream of the aperture. 4
  • a chamber 9 Between the diaphragm 4 and the nozzle 6 is a chamber 9, surrounded by a homogenizing element 10 with finely distributed passages 11 for the combustion air flow.
  • a homogenizing element 10 In the chamber 9, the combustion air flow from the housing 8 enters radially and passes from there to the flow openings 5 in the diaphragm 4.
  • the cylindrical homogenizing element 10 is located in the axial direction both on the diaphragm 4 and on a boundary wall 12 on the side of the Nozzle stock 6 and forms outside of the wall of the cylindrical housing 8 an annular gap.

Description

Die Erfindung betrifft eine Mischeinrichtung für einen Öl- oder Gasbrenner nach dem Oberbegriff des Patentanspruches 1.The invention relates to a mixing device for an oil or gas burner according to the preamble of claim 1.

Ein gattungsgemäßer Brenner ist beispielsweise aus der EP 0 558 455 A1 bekannt. Im Ausführungsbeispiel gemäß Figur 8 besteht der Brenner aus einem Brennergehäuse mit einer in diesem angeordneten Kammer und ein sich daran anschließendes Flammrohr. Die Luft tritt radial aus dem Gehäuse in die Kammer ein und wird durch Flügel in eine schraubenförmige Zirkulation versetzt. In der Kammer ist ein Düsenstock mit einer einen Brennstoffstrahl erzeugenden Düse angeordnet, und in das Flammrohr breitet sich der Brennstoffstrahl aus. Zwischen der Kammer und der Brennkammer befindet sich eine Blende mit einer zentralen Öffnung, durch welche der Brennstoffstrahl hindurch tritt. Mit einem Gebläse wird der in die Brennkammer eintretende Verbrennungsluftstrom erzeugt.A generic burner is for example from the EP 0 558 455 A1 known. In the exemplary embodiment according to FIG. 8, the burner consists of a burner housing with a chamber arranged in the latter and a flame tube connected thereto. The air enters the chamber radially from the housing and is displaced by vanes in a helical circulation. In the chamber, a nozzle with a fuel jet generating nozzle is arranged, and in the flame tube, the fuel jet spreads. Between the chamber and the combustion chamber is a diaphragm with a central opening through which the fuel jet passes. With a blower entering the combustion chamber combustion air flow is generated.

Der Brenner aus der EP 0 683 883 B1 besteht aus einem Brennergehäuse, welches ein Stützrohr mit einer in diesem angeordneten Vorkammer und ein sich daran anschließendes Flammrohr aufweist. Im Stützrohr ist in der Vorkammer ein Düsenstock mit einer einen Brennstoffstrahl erzeugenden Düse angeordnet, und in das Flammrohr breitet sich der Brennstoffstrahl aus. Zwischen der Vorkammer und der Brennkammer befindet sich eine Blende mit einer zentralen Öffnung, durch welche der Brennstoffstrahl hindurch tritt. Mit einem Gebläse wird der in die Brennkammer eintretende Verbrennungsluftstrom erzeugt. Dieser umfasst einen brennstoffstrahlnahen Teilstrom sowie einen rezirkulationsstabilisierenden Teilstrom. Der radial außen liegende rezirkulationsstabilisierende Teilstrom besitzt die Form eines einem in Umfangsrichtung unterbrochenen Ringstromes entsprechenden Strömungsbildes, so dass sich in der Brennkammer eine von der blau brennenden Flamme zum nichtbrennenden Teil des Brennstoffstrahls zurück verlaufende innere Rezirkulationsströmung ausbildet. Außerdem stabilisiert der rezirkulationsstabilisierende Teilstrom der Brennluft die innere Rezirkulationsströmung.The burner from the EP 0 683 883 B1 consists of a burner housing, which has a support tube with an arranged in this prechamber and an adjoining flame tube. In the support tube, a nozzle with a fuel jet nozzle is arranged in the prechamber, and in the flame tube, the fuel jet spreads. Between the pre-chamber and the combustion chamber is a diaphragm with a central opening through which the fuel jet passes. With a blower entering the combustion chamber combustion air flow is generated. This includes a partial stream close to the fuel jet and a recirculation-stabilizing partial flow. The radially outer recirculation-stabilizing partial flow has the shape of a flow pattern corresponding to an annular flow interrupted in the circumferential direction, so that an inner recirculation flow running back from the blue-burning flame to the non-combusting part of the fuel jet is formed in the combustion chamber. In addition, the recirculation-stabilizing partial flow of the combustion air stabilizes the inner recirculation flow.

Weiterhin offenbart die DE 199 48 876 A1 ein Verfahren zum Schaffen eines homogenen Verbrennungsluftstromes durch Änderung der Struktur. Dabei wird der Luftstrom durch das Laufrad eines Gebläses in den Spiralkanal des Gebläsegehäuses gepresst und daraus in einer etwa rechtwinkligen Umlenkung in ein seitlich angeordnetes Brennergehäuse geleitet. Aus diesem strömt die Verbrennungsluft durch Luftlöcher in einem Verteilerelement in die Brennzone eines Gebläsebrenners ein. Es erfolgt eine n-stufige Verringerung des Turbulenzgrades, wobei als 1. Stufe an der Umlenkung vom Spiralkanal zum Brennergehäuse ein Linearberuhiger, vorzugsweise in Form eines Lamellengitters, und/oder als 2. Stufe im Brennergehäuse ein Rohrberuhiger, vorzugsweise in Form eines stirnseitig zum Verteilerelement offenen Zylindergitters, und/oder als 3. Stufe ein Kreisberuhiger in Form eines mit kleinen Löchern versehenen Gitters vor dem Verteilerelement den Luftstrom homogenisiert. Dabei gelangt die Verbrennungsluft über eine relativ lange Mantelfläche in das Zentrum des zylindrischen Beruhigungselementes und von dort aus zur in axialer Anströmrichtung zur Blende.Furthermore, the disclosure DE 199 48 876 A1 a method for providing a homogeneous combustion air flow by changing the structure. In this case, the air flow is pressed by the impeller of a fan in the spiral channel of the blower housing and passed therefrom in an approximately rectangular deflection in a laterally arranged burner housing. For this purpose, the combustion air flows through air holes in a distributor element in the combustion zone of a fan burner. There is an n-stage reduction in the degree of turbulence, with the 1st stage at the deflection from the spiral channel to the burner housing a Linearberuhiger, preferably in the form of a lamellar grid, and / or as a 2nd stage in the burner housing a Rohrberuhiger, preferably in the form of a front side to the distributor element open cylinder grating, and / or as a 3rd stage a Kreisberuhiger in the form of a grid provided with small holes in front of the Distributor element homogenized the air flow. In this case, the combustion air passes over a relatively long lateral surface in the center of the cylindrical calming element and from there to in the axial direction of flow to the aperture.

Möglicherweise kann sich diese Anordnung ungünstig auf die Verbrennungsqualität und die Flammenstabilität auswirken, weil Verwirbelungen entstehen. Diese gelangen bis an die Blende und/oder die einströmende Verbrennungsluft tritt ungleichmäßig durch den Mantel des Beruhigungselementes hindurch.Possibly, this arrangement may adversely affect combustion quality and flame stability because of turbulence. These reach up to the aperture and / or the incoming combustion air occurs unevenly through the mantle of the calming element.

Aus der DE 24 07 504 ist zusätzlich noch eine Brennvorrichtung zum rußfreien Verbrennen von flüssigen Brennstoffen bekannt, bei der die den Luftkanal durchströmende Luft mittels eines axial verstellbaren, zylindrischen Vergaserkopfes regelbar ist. Dieser ist im Bereich einer Zerstäuberdüse angebracht und besitzt auf seinem Mantel einzelne eingearbeitete Durchtrittsöffnungen für einen ersten Teilstrom der Verbrennungsluft. Weiterhin bildet der Vergaserkopf gemeinsam mit dem Luftführungsrohr auf Höhe der Düsenöffnung eine Drosselstelle für die zuzuführende Luftmenge in Form eines Teilstromes, welcher direkt aus dem Luftkanal in die Verbrennungszone strömt.From the DE 24 07 504 In addition, a combustion device for soot-free burning of liquid fuels is additionally known in which the air flowing through the air duct can be regulated by means of an axially adjustable, cylindrical gasifier head. This is mounted in the region of a spray nozzle and has on its jacket individual incorporated through openings for a first partial flow of the combustion air. Furthermore, the carburetor head together with the air duct at the height of the nozzle opening forms a throttle point for the amount of air to be supplied in the form of a partial flow, which flows directly from the air duct into the combustion zone.

Der Erfindung liegt die Aufgabe zugrunde, eine kompakt aufgebaute Mischeinrichtung für einen Öl- oder Gasbrenner zu schaffen sowie dessen Verbrennungsqualität und Robustheit in unterschiedlichen Betriebszuständen zu optimieren.The invention has for its object to provide a compact constructed mixing device for an oil or gas burner and to optimize its combustion quality and robustness in different operating conditions.

Erfindungsgemäß wurde dies mit den Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.This has been achieved with the features of claim 1 according to the invention. Advantageous developments can be found in the dependent claims.

Die Mischeinrichtung für einen Öl- oder Gasbrenner ist dadurch gekennzeichnet, dass stromaufwärts vor der Blende, zwischen der Blende und dem Düsenstock, eine Kammer mit einem Vergleichmäßigungselement mit fein verteilten Durchtrittsöffnungen für den Verbrennungsluftstrom gebildet wird. In diese tritt der Verbrennungsluftstrom aus dem Gehäuse radial ein und gelangt somit gleichmäßig von allen Seiten zu den Strömungsöffnungen in der Blende.The mixing device for an oil or gas burner is characterized in that upstream of the orifice, between the orifice and the nozzle, a chamber is formed with a homogenizing element with finely distributed passages for the combustion air flow. In this, the combustion air flow from the housing enters radially and thus passes evenly from all sides to the flow openings in the diaphragm.

Das zylindrische Vergleichmäßigungselement liegt in axialer Richtung sowohl an der Blende als auch an einer geschlossenen Begrenzungswand auf der Seite des Düsenstocks an.The cylindrical homogenizing element abuts in the axial direction both on the diaphragm and on a closed boundary wall on the side of the nozzle block.

Es ist mit einem radialen Abstand zur Wand des umgebenden zylindrischen Gehäuses so angeordnet, dass ein Ringspalt entsteht. Vorzugsweise bildet ein Lochblech das zylindrische Vergleichmäßigungselement. Die Begrenzungswand der Kammer auf der Seite des Düsenstockes ist auf diesen aufgesetzt und die Haltevorrichtungen für die Blende, welche an der Begrenzungswand oder direkt am Düsenstock angebracht sein können, sind innerhalb des Vergleichmäßigungselementes angeordnet. Dabei entspricht die Tiefe des zylindrischen Vergleichmäßigungselementes bzw. der Abstand zwischen Blende und Begrenzungswand etwa dem halben Durchmesser der Blende. Auch kann die Blende direkt über das Vergleichmäßigungselement an der Begrenzungswand befestigt sein. Zusätzliche Haltevorrichtungen können dann entfallen.It is arranged with a radial distance to the wall of the surrounding cylindrical housing so that an annular gap is formed. Preferably, a perforated plate forms the cylindrical homogenizing element. The boundary wall of the chamber on the side of the nozzle assembly is placed on this and the holding devices for the diaphragm, which may be attached to the boundary wall or directly on the nozzle, are arranged within the homogenizing element. The depth of the cylindrical homogenization element or the distance between the diaphragm and the boundary wall corresponds approximately to half the diameter of the diaphragm. Also, the panel may be attached directly to the boundary wall via the homogenizing element. Additional holding devices can then be omitted.

In einer weiteren Ausführungsform wird die Begrenzungswand auf der Seite des Düsenstockes bis an die Wand des Gehäuses verlängert und außen im Bereich des Ringspaltes mit Durchtrittsöffnungen für den Verbrennungsluftstrom versehen, deren Gesamtquerschnitte vorzugsweise größer als die Gesamtquerschnitte aller Durchtrittsöffnungen am Vergleichmäßigungselement gewählt sind. Damit wird bereits eine erste Vergleichmäßigung in axialer Richtung erreicht, bevor die Verbrennungsluft durch das eigentliche Vergleichmäßigungselement hindurch tritt. Es entsteht in der Umlenkungszone eine weitere Kammer, die der Kammer an der Blende vorgeschaltet ist.In a further embodiment, the boundary wall is extended on the side of the nozzle assembly to the wall of the housing and provided outside in the region of the annular gap with passage openings for the combustion air flow, the total cross-sections are preferably selected to be greater than the total cross sections of all passage openings on the equalization. This already achieves a first equalization in the axial direction before the combustion air passes through the actual homogenizing element. It arises in the deflection zone, a further chamber, which is connected upstream of the chamber at the diaphragm.

Um die gleichmäßige Anströmung des Vergleichmäßigungselementes zu begünstigen, können generell im Ausmündungsbereich des Verbrennungsluftkanals und/oder an der Innenseite der Wand des Gehäuses Strömungsleitelemente, beispielsweise Rippen, angeordnet sein.In order to promote the uniform flow of the homogenizing element, flow guide elements, for example ribs, can generally be arranged in the outlet region of the combustion air channel and / or on the inside of the wall of the housing.

Bei einer weiteren Variante werden mehrere zylindrische Vergleichmäßigungselemente mit unterschiedlichen Durchmessern, und mit jeweils unterschiedlichen oder gleichen Querschnitten oder Anordnungen der einzelnen Durchtrittsöffnungen für den Verbrennungsluftstrom, mit geringem Abstand übereinander angeordnet. Diese sind einander zugeordnet und sorgen für eine mehrfache Vergleichmäßigung der radial in die Kammer an der Blende eintretenden Verbrennungsluft. Für eine genaue Anpassung des Verbrennungsluftdurchsatzes bzw. der Durchströmung einzelner Zonen der Blende können die Querschnitte der Durchtrittsöffnungen für den Verbrennungsluftstrom auf dem Mantel eines Vergleichmäßigungselementes bei Bedarf variieren. Dabei sind vorzugsweise in der Nähe der Blende kleinere Querschnitte vorhanden.In a further variant, a plurality of cylindrical homogenizing elements with different diameters, and with respectively different or identical cross sections or arrangements of the individual passage openings for the combustion air flow, are arranged one above the other at a small distance. These are associated with each other and ensure multiple equalization of the radially entering the chamber at the aperture combustion air. For a precise adjustment of the combustion air flow rate or the flow through individual zones of the diaphragm, the cross sections of the passage openings for the combustion air flow on the jacket of a homogenizing element can vary as needed. In this case, smaller cross sections are preferably present in the vicinity of the aperture.

Mit den erfindungsgemäßen Maßnahmen wird eine kompakt aufgebaute Mischeinrichtung für einen Öl- oder Gasbrenner geschaffen sowie dessen Verbrennungsqualität und Robustheit in unterschiedlichen Betriebszuständen optimiert. Besonders beim Einsatz von Gebläsen mit einem Verbrennungsluftkanal, welcher etwa im rechten Winkel zur Achse der Mischeinrichtung ausgerichtet ist und dessen Verbrennungsluftstrom nicht in axialer Richtung in das Gehäuse stromaufwärts der Blende einströmt, wird eine gleichmäßige, möglichst wirbelarme Anströmung der Blende gewährleistet. Dadurch können einerseits aufwendige Verteiler- und Beruhigungsvorichtungen im Ausmündungsbereich des Verbrennungsluftkanals entfallen. Andererseits vereinfacht sich der Gesamtaufbau einer Mischeinrichtung und der gesamte Brenner bekommt sehr kompakte Abmessungen, weil die Anordnung des Gebläses bzw. des Verbrennungsluftkanals nicht mehr direkt von der Einströmsituation an der Mischeinrichtung, insbesondere stromaufwärts der Blende, abhängt.With the measures according to the invention a compact constructed mixing device for an oil or gas burner is created and its combustion quality and Robustness optimized in different operating conditions. Especially when using blowers with a combustion air duct, which is aligned approximately at right angles to the axis of the mixing device and the combustion air flow does not flow in the axial direction in the housing upstream of the aperture, a uniform, possible low turbulence flow of the aperture is guaranteed. As a result, on the one hand expensive distribution and calming devices in the discharge area of the combustion air duct can be omitted. On the other hand, simplifies the overall design of a mixing device and the entire burner gets very compact dimensions, because the arrangement of the fan or the combustion air duct no longer directly depends on the Einströmsituation to the mixing device, in particular upstream of the aperture.

Die Zeichnung stellt ein Ausführungsbeispiel der Erfindung dar und zeigt in einer einzigen Figur einen senkrechten Längsschnitt durch eine Mischeinrichtung eines Öl- oder Gasbrenners.The drawing illustrates an embodiment of the invention and shows in a single figure a vertical longitudinal section through a mixing device of an oil or gas burner.

Die Mischeinrichtung besteht aus einem Flammrohr 1, welches eine Brennkammer 2 umgibt, in die sich ein Brennstoffstrahl aus einer Brennstoffdüse 3 ausbreitet. Diese ist stromaufwärts zur Brennkammer 2, kurz hinter einer Blende 4 mit Strömungsöffnungen 5 für die Verbrennungsluft, auf einem sogenannten Düsenstock 6 angebracht.The mixing device consists of a flame tube 1, which surrounds a combustion chamber 2, in which a fuel jet from a fuel nozzle 3 propagates. This is upstream of the combustion chamber 2, shortly behind a diaphragm 4 with flow openings 5 for the combustion air, mounted on a so-called nozzle 6.

Mit einem Gebläse wird der Verbrennungsluftstrom erzeugt. Er mündet über einen Verbrennungsluftkanal 7 etwa im rechten Winkel zur Achse der Mischeinrichtung in ein Gehäuse 8 stromaufwärts der Blende 4.With a fan, the combustion air flow is generated. It opens via a combustion air duct 7 approximately at right angles to the axis of the mixing device in a housing 8 upstream of the aperture. 4

Zwischen der Blende 4 und dem Düsenstock 6 befindet sich eine Kammer 9, umgeben von einem Vergleichmäßigungselement 10 mit fein verteilten Durchtrittsöffnungen 11 für den Verbrennungsluftstrom. In die Kammer 9 tritt der Verbrennungsluftstrom aus dem Gehäuse 8 radial ein und gelangt von dort aus zu den Strömungsöffnungen 5 in der Blende 4. Das zylindrische Vergleichmäßigungselement 10 liegt in axialer Richtung sowohl an der Blende 4 als auch an einer Begrenzungswand 12 auf der Seite des Düsenstocks 6 an und bildet außen zur Wand des zylindrischen Gehäuses 8 einen Ringspalt.Between the diaphragm 4 and the nozzle 6 is a chamber 9, surrounded by a homogenizing element 10 with finely distributed passages 11 for the combustion air flow. In the chamber 9, the combustion air flow from the housing 8 enters radially and passes from there to the flow openings 5 in the diaphragm 4. The cylindrical homogenizing element 10 is located in the axial direction both on the diaphragm 4 and on a boundary wall 12 on the side of the Nozzle stock 6 and forms outside of the wall of the cylindrical housing 8 an annular gap.

Claims (7)

  1. Mixing device for an oil or gas burner, composed of a nozzle stem (6) with a distributor device mounted thereon and a central fuel nozzle (3), of a flame tube (1) which projects into a combustion chamber, of an orifice plate (4) with flow orifices (5) for the combustion air in the mouth region of a combustion air duct (7) which is connected to a blower and which is oriented approximately at right angles to the axis of the mixing device and which issues into a housing (8) upstream of the orifice plate (4), and of a chamber (9) upstream of the orifice plate (4) and between the orifice plate (4) and the nozzle stem (6), into which chamber the combustion air stream enters radially from the housing (8),
    characterized in that the chamber (9) is formed with a homogenizing element (10) with finely distributed passage orifices (11) for the combustion air stream, wherein the homogenizing element (10) bears in an axial direction both against the orifice plate (4) and also against a delimiting wall (12) on the side of the nozzle stem (6) and, with a radial spacing to the wall of the cylindrical housing (8), forms an annular gap, and in that the delimiting wall (12) on the side of the nozzle stem (6) is elongated as far as the wall of the housing (8) and is provided, at the outside in the region of the annular gap, with passage orifices for the combustion air stream, the overall cross sections of which passage orifices are preferably selected so as to be greater than the overall cross sections of all of the passage orifices (11) on the homogenizing element (10).
  2. Mixing device according to Claim 1,
    characterized in that the homogenizing element (10) is cylindrical and is preferably a perforated metal sheet.
  3. Mixing device according to one of Claims 1 and 2,
    characterized in that the delimiting wall (12) of the chamber (9) is mounted on the nozzle stem (6) on the side of the latter, and in that holding devices for the orifice plate (4) are arranged within the homogenizing element (10).
  4. Mixing device according to one of Claims 1 to 3,
    characterized in that the depth of the cylindrical homogenizing element (10) or the spacing between the orifice plate (4) and delimiting wall (12) corresponds approximately to half of the diameter of the orifice plate (4).
  5. Mixing device according to one of Claims 1 to 4,
    characterized in that flow guiding elements are arranged in the mouth region of the combustion air duct (7) and/or on the inner side of the wall of the housing (8).
  6. Mixing device according to one of Claims 1 to 5,
    characterized in that a plurality of cylindrical homogenizing elements (10) with different diameters, and with in each case different or identical cross sections or arrangements of the individual passage orifices (11) for the combustion air stream, are arranged above one another and assigned to one another with a small spacing.
  7. Mixing device according to one of Claims 1 to 6,
    characterized in that the cross sections of the passage orifices (11) for the combustion air stream on the casing of a homogenizing element (10) vary, wherein smaller cross sections are preferably provided in the vicinity of the orifice plate (4).
EP04013442.1A 2003-06-18 2004-06-08 Mixing Device for an Oil- or Gasburner Not-in-force EP1489352B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10327391 2003-06-18
DE2003127391 DE10327391B3 (en) 2003-06-18 2003-06-18 Mixer unit for a gas- or oil-fired central heating burner has chamber with a fuel supply harmonisation unit with numerous fine apertures

Publications (2)

Publication Number Publication Date
EP1489352A1 EP1489352A1 (en) 2004-12-22
EP1489352B1 true EP1489352B1 (en) 2013-08-14

Family

ID=33394856

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04013442.1A Not-in-force EP1489352B1 (en) 2003-06-18 2004-06-08 Mixing Device for an Oil- or Gasburner

Country Status (2)

Country Link
EP (1) EP1489352B1 (en)
DE (1) DE10327391B3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10533740B2 (en) 2015-07-09 2020-01-14 Carrier Corporation Inward fired ultra low NOX insulating burner flange
CN115435338B (en) * 2022-11-09 2023-01-03 中国空气动力研究与发展中心超高速空气动力研究所 Large-flow combustion heating injector adopting mixing nozzle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407504A1 (en) * 1974-02-16 1975-08-28 Elco Oelbrennerwerk Ag Soot-free combustion burner - has cylindrical jacket downstream of jet to contain flame shape and achieving complete combustion

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2553953C2 (en) * 1975-12-01 1978-04-20 Max Weishaupt Gmbh, 7959 Schwendi Liquid fuel burners
DE7823246U1 (en) * 1978-08-03 1978-11-09 Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg BURNERS FOR LIQUID OR GASEOUS FUEL
DE2900640C2 (en) * 1979-01-09 1984-10-04 Max Weishaupt Gmbh, 7959 Schwendi Liquid fuel burners
DE59303606D1 (en) * 1992-02-28 1996-10-10 Fuellemann Patent Ag Burners, in particular oil burners or combined oil / gas burners
EP0683883B1 (en) 1993-12-18 2001-02-28 Deutsches Zentrum für Luft- und Raumfahrt e.V. Blue-flame burner with optimized combustion characteristics
DE19741508A1 (en) * 1997-08-16 1999-05-06 Buderus Heiztechnik Gmbh Mixer for oil or gas burner
DE19737998A1 (en) * 1997-08-30 1999-03-04 Abb Research Ltd Burner device
DE19948876C2 (en) * 1999-10-08 2003-06-26 Buderus Heiztechnik Gmbh Process for creating a homogeneous air flow in a forced draft burner and device for its implementation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407504A1 (en) * 1974-02-16 1975-08-28 Elco Oelbrennerwerk Ag Soot-free combustion burner - has cylindrical jacket downstream of jet to contain flame shape and achieving complete combustion

Also Published As

Publication number Publication date
DE10327391B3 (en) 2004-12-16
EP1489352A1 (en) 2004-12-22

Similar Documents

Publication Publication Date Title
DE2918416C2 (en) Gasification oil burner
DE60113620T2 (en) Gas burner nozzle and method of cooling same
EP1802915B1 (en) Gas turbine burner
DE4138433C2 (en) Burners for industrial furnaces
EP1489352B1 (en) Mixing Device for an Oil- or Gasburner
EP0882932B1 (en) Combustor
EP0430011B1 (en) Burner for the combustion of liquid or gaseous fuels
DE2410141B2 (en) BURNER FOR FLUID FUELS
EP0777082A2 (en) Premix burner
DE4323300C2 (en) Mixing device for a burner
DE2843002C2 (en) Fuel oil burner
DE10349836B3 (en) Mixer for air and oil or gas in a burner has throttle formed by annular gap
EP0180607B1 (en) Combustion process with ionization monitoring
DE19503781A1 (en) Gas or oil burner air flow mixing system
EP1916475A2 (en) Mixing device for a oil or a gas burner
DE4327497A1 (en) Atomiser nozzle for a burner, and a burner
DE19735345A1 (en) Oil or gas blower burner with burner pipe with blast connection
DE10144400A1 (en) Device for introducing a fuel / air mixture into a burner and method for mounting such a device
DE19614098A1 (en) Premixed gas burner
DE10348272B3 (en) Mixing device for oil or gas burner has guide element downstream of diaphragm, by which exhaust gas is directed to diaphragm
EP1731834A1 (en) Burner for liquid fuel
EP0601018A1 (en) Gas burner, in particular for liquefied gas
AT405762B (en) Gas burner
WO2011022847A1 (en) Burner for generating a hot gas stream
DE7936980U1 (en) GASIFICATION OIL BURNER

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20050112

AKX Designation fees paid

Designated state(s): AT BE CH DE FR LI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

17Q First examination report despatched

Effective date: 20110315

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR LI

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 627067

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130815

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502004014309

Country of ref document: DE

Effective date: 20131010

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20140515

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502004014309

Country of ref document: DE

Effective date: 20140515

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004014309

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004014309

Country of ref document: DE

Effective date: 20150101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20150227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140630

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150101

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140630

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 627067

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140630