EP0227637B1 - Oil burner - Google Patents

Oil burner Download PDF

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Publication number
EP0227637B1
EP0227637B1 EP19860890355 EP86890355A EP0227637B1 EP 0227637 B1 EP0227637 B1 EP 0227637B1 EP 19860890355 EP19860890355 EP 19860890355 EP 86890355 A EP86890355 A EP 86890355A EP 0227637 B1 EP0227637 B1 EP 0227637B1
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EP
European Patent Office
Prior art keywords
mixing tube
section
flue gas
combustion air
oil burner
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.)
Expired - Lifetime
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EP19860890355
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German (de)
French (fr)
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EP0227637A2 (en
EP0227637A3 (en
Inventor
Helmut Dr. Brücker
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Dr Bruecker & Zeman & Mag Seyr Controlled Soft Combustion Gesellschaft Buergerlichen Rechts
Original Assignee
Dr Bruecker & Zeman & Mag Seyr Controlled Soft Combustion Gesellschaft Buergerlichen Rechts
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Publication of EP0227637A2 publication Critical patent/EP0227637A2/en
Publication of EP0227637A3 publication Critical patent/EP0227637A3/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
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; Burner heads
    • F23D11/402—Mixing chambers downstream of the nozzle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel

Definitions

  • the invention relates to an oil burner with an oil atomization device, a combustion air supply coaxially surrounding this, which opens into an aperture, and with a mixing tube open at both ends for fuel, combustion air and exhaust gas, which is arranged downstream of the aperture in a combustion chamber, wherein Exhaust gas coming directly from the combustion chamber is sucked around the outside of the mixing tube and into a first, upstream section thereof.
  • Oil burners with recirculation of hot exhaust gas that comes directly from the combustion chamber at the beginning of the combustion chamber are known as blue burners or gasification oil burners.
  • An oil burner with the features mentioned in the introductory part of claim 1 is known from DE-4-27 00 671. This oil burner has the advantage of particularly soot-free and complete combustion with good thermal efficiency. However, they only achieve these goals within a relatively narrow performance range.
  • the invention has for its object to improve an oil burner of the type mentioned while maintaining its advantages with regard to the smallest possible emission of pollutants in an extended performance range.
  • both the combustion air supply surrounding the oil atomization device and a downstream, second section of the mixing tube, which is expanded compared to the first section thereof, for supplying a mixture from the Exhaust gas and combustion air removed from the boiler are connected to a line for supplying combustion air and a line for supplying cooled exhaust gas via a mixing device, the line for supplying the mixture of exhaust gas and combustion air opening into the mixing tube in the region of its expansion from the outside.
  • an oil atomization device 1 arranged in the longitudinal axis of the oil burner is coaxially surrounded by a combustion air supply which has an inner region 2 and an outer region 16.
  • a combustion air supply which has an inner region 2 and an outer region 16.
  • an aperture 3 is arranged at the end of the inner area 2 of the combustion air supply.
  • the aperture 3 is followed by a mixing tube 4 which is coaxial with the oil burner and is open at both ends.
  • the mixing tube 4 has a first section 5 which is widened with respect to the diaphragm opening 3 and a second section 6 which is widened with respect to the first section 5.
  • the extension 7 of the mixing tube 4 is designed as a step and is located approximately in the middle of the longitudinal extension of the mixing tube 4.
  • the mixing tube 4 is arranged in a combustion chamber 8, which has a first section 9 which extends approximately to the extension 7 of the mixing tube 4 and has a second section 10, which connects with its opening 11 to a boiler, not shown in FIG. 1.
  • the first section 9 of the combustion chamber 8 has a radially outer jacket 12, which serves as a line for the supply of a mixture of exhaust gas and combustion air, and an annular space 13 adjoining it on the inside.
  • the annular space 13 connects the second section 10 of the combustion chamber 8 to the inlet opening of the mixing tube 4. Due to the injector action of the gas mixture emerging from the orifice 3, hot exhaust gas is converted from the second section 10 of the combustion chamber 8 through the axially parallel lines 18 and the annular space 13 around the mixing tube 4 sucked into this outside.
  • the combustion air supply with its areas 2 and 16, which surrounds the oil atomization device 1, is acted upon by a mixture of cooled exhaust gas and combustion air removed from the boiler.
  • the end of the outer region 16 of the combustion air supply is connected to the outer jacket 12 of the first section 9 of the combustion chamber 8 via an annular aperture 17 with two perforated rings which can be rotated relative to one another.
  • the jacket 12 is in turn connected to the beginning of the enlarged, second section 6 of the mixing tube 4 via radial lines which are arranged between the axially parallel lines 18. Due to the injector action on the step-shaped extension 7 of the mixing tube 4, the mixture of cooled exhaust gas from the boiler and combustion air emerging from the radial lines mixes well with the hot gas mixture emerging from the first section 5 of the mixing tube 4.
  • a substoichiometric atmospheric oxygen-fuel ratio ( ⁇ 1) is set in the first section 5 of the mixing tube 4.
  • regulation takes place by means of corresponding control valves in the air and / or oil supply line to the burner, as will be explained further with reference to FIG. 2.
  • the regulation takes place via the ring aperture 17.
  • An ionization probe IS monitors the combustion temperature in the combustion chamber 8.
  • An ignition device 19 is arranged in the area of the aperture 3 in the oil burner.
  • Thermal insulation layers 20, 21 provide insulation of the outer jacket 12 of the first section 9 of the combustion chamber 8 with respect to the annular space 13.
  • FIG. 2 the gas, oil and air lines are shown with solid lines and the electrical control lines with dashed lines.
  • the oil burner is designated in FIG. 2 with B, the boiler with K and a process control unit with P.
  • NT-ART low-temperature exhaust gas recirculation
  • Another line to the oil burner B is used for the supply of heating oil and leads via a pump PU and a control valve to the oil burner B.
  • a gas line that is only available in the case of heating with gaseous fuel leads via a control valve to the oil burner B.
  • a drive unit M drives the fan G and the oil pump P.
  • HT-ARF high-temperature exhaust gas recirculation
  • the output lines of the process control unit P lead to a mixing valve air-boiler exhaust gas, to the drive unit M, to the control valve in the oil line and possibly to the control valve in the gas line.
  • Another outlet line of the process control unit P leads to the ignition Z of the burner (ignition device 19 in FIG. 1).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Description

Die Erfindung betrifft einen Ölbrenner mit einer Ölzerstäubungseinrichtung, einer diese koaxial umgebenden Verbrennungsluft-Zuführung, die in eine Blendenöffnung mündet, sowie mit einem an seinen beiden Enden offenen Mischrohr für Brennstoff, Verbrennungsluft und Abgas, das stromabwärts der Blendenöffnung in einer Brennkammer angeordnet ist, wobei unmittelbar aus der Brennkammer stammendes Abgas um das Mischrohr außen herum und in einen ersten, stromaufwärtigen Abschnitt desselben hineingesaugt wird.The invention relates to an oil burner with an oil atomization device, a combustion air supply coaxially surrounding this, which opens into an aperture, and with a mixing tube open at both ends for fuel, combustion air and exhaust gas, which is arranged downstream of the aperture in a combustion chamber, wherein Exhaust gas coming directly from the combustion chamber is sucked around the outside of the mixing tube and into a first, upstream section thereof.

Ölbrenner mit Rückführung von heißem Abgas, das unmittelbar aus der Brennkammer stammt, zum Beginn der Brennkammer, sind als Blaubrenner bzw. Vergasungsölbrenner bekannt. Ein Ölbrenner mit den im einleitenden Teil des Anspruches 1 genanntene Merkmalen ist aus der DE-4-27 00 671 bekannt. Dieser Ölbrenner hat den Vorteil einer besonders rußfreien und vollständigen Verbrennung bei gutem wärmetechnischem Wirkungsgrad. Allerdings erreichen sie diese Ziele nur innerhalb eines relativ schmalen Leistungsbereiches.Oil burners with recirculation of hot exhaust gas that comes directly from the combustion chamber at the beginning of the combustion chamber are known as blue burners or gasification oil burners. An oil burner with the features mentioned in the introductory part of claim 1 is known from DE-4-27 00 671. This oil burner has the advantage of particularly soot-free and complete combustion with good thermal efficiency. However, they only achieve these goals within a relatively narrow performance range.

Der Erfindung liegt die Aufgabe zugrunde, einen Ölbrenner der eingangs genannten Gattung unter Beibehaltung seiner Vorteile im Hinblick auf einen möglichst kleinen Schadstoffausstoß in einem erweiterten Leistungsbereich zu verbessern.The invention has for its object to improve an oil burner of the type mentioned while maintaining its advantages with regard to the smallest possible emission of pollutants in an extended performance range.

Diese Aufgabe wird bei einem Ölbrenner der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß sowohl die die Ölzerstäubungseinrichtung umgebende Verbrennungsluft-Zuführung als auch ein stromabwärts gelegener, zweiter Abschnitt des Mischrohres, der gegenüber dem ersten Abschnitt desselben erweitert ist, zum Zuführen eines Gemisches von aus dem Kessel entnommenem Abgas und Verbrennungsluft mit einer Leitung zum Zuführen von Verbrennungsluft und einer Leitung zum Zuführen von abgekühltem Abgas über eine Mischvorrichtung verbunden ist, wobei die Leitung zum Zuführen des Gemisches aus Abgas und Verbrennungsluft in das Mischrohr im Bereich seiner Erweiterung von außen her einmündet.This object is achieved according to the invention in an oil burner of the type mentioned at the outset in that both the combustion air supply surrounding the oil atomization device and a downstream, second section of the mixing tube, which is expanded compared to the first section thereof, for supplying a mixture from the Exhaust gas and combustion air removed from the boiler are connected to a line for supplying combustion air and a line for supplying cooled exhaust gas via a mixing device, the line for supplying the mixture of exhaust gas and combustion air opening into the mixing tube in the region of its expansion from the outside.

Beim erfindungsgemäßen Ölbrenner bilden sich in der Brennkammer und in dem in dieser angeordneten Mischrohr zwei verschiedene Reaktionszonen aus:

  • In einer ersten Reaktionszone im ersten Abschnitt des Mischrohres kommt es durch die hohe Temperatur, die durch die Rückführung von heißem, aus der Brennkammer stammendem Abgas und abgekühltem Abgas des Kessels erreicht wird, zu einer vollständigen Vergasung des Öls, ohne daß sich Ruß bilden kann. In der zweiten Reaktionszone im zweiten Abschnitt des Mischrohres kommt es durch die Zufuhr des Gemisches von aus dem Kessel entnommenem Abgas und Verbrennungsluft zu einer Abkühlung der Reaktionsgase, so daß bei der gleichzeitigen Verbrennung zu hohe Temperaturen vermieden werden, die insbesondere die Bildung von Stickoxiden fördern würden. Die beiden Reaktionszonen sind im Hinblick auf eine vollständige Verbrennung und Maximierung der Wärmeausbeute sowie auf eine Minimierung des Anfalls von Schadstoffen getrennt regelbar. Dabei wird mit Vorteil im stromaufwärts gelegenen ersten Abschnitt des Mischrohres ein unterstöchiometrisches Luftsauerstoff-Brennstoff-Verhältnis und im zweiten Abschnitt des Mischrohres ein etwa stöchiometrisches Luftsauerstoff-Brennstoff-Verhältnis eingestellt.
In the oil burner according to the invention, two different reaction zones are formed in the combustion chamber and in the mixing tube arranged in it:
  • In a first reaction zone in the first section of the mixing tube, the high temperature, which is achieved by the recirculation of hot exhaust gas coming from the combustion chamber and cooled exhaust gas from the boiler, leads to a complete gasification of the oil without soot forming. In the second reaction zone in the second section of the mixing tube, the supply of the mixture of exhaust gas and combustion air removed from the boiler cools the reaction gases, so that excessive temperatures are avoided during the simultaneous combustion, which would in particular promote the formation of nitrogen oxides . The two reaction zones can be regulated separately with a view to complete combustion and maximizing the heat yield as well as minimizing the accumulation of pollutants. A sub-stoichiometric atmospheric oxygen-fuel ratio is advantageously set in the upstream first section of the mixing tube and an approximately stoichiometric atmospheric oxygen-fuel ratio in the second section of the mixing tube.

Weitere bevorzugte und vorteilhafte Ausführungsformen des erfindungsgemäßen Ölbrenners sind in den Unteransprüchen gekennzeichnet und ergeben sich aus der nachstehenden Beschreibung einer Ausführungsform des erfindungsgemäßen Ölbrenners, die als nicht beschränkendes Beispiel in den Zeichnungen wiedergegeben ist. Es zeigt.

  • Fig. 1 einen Ölbrenner im Längsschnitt und
  • Fig. 2 das Regelsystem des Ölbrenners.
Further preferred and advantageous embodiments of the oil burner according to the invention are characterized in the subclaims and result from the following description of an embodiment of the oil burner according to the invention, which is shown in the drawings as a non-limiting example. It shows.
  • Fig. 1 is an oil burner in longitudinal section and
  • Fig. 2 shows the control system of the oil burner.

Beim in Fig. 1 gezeigten Ölbrenner ist eine in der Längsachse des Ölbrenners angeordnete Ölzerstäubungseinrichtung 1 koaxial von einer Verbrennungsluftzuführung umgeben, die einen inneren Bereich 2 und einen äußeren Bereich 16 aufweist. Am Ende des inneren Bereiches 2 der Verbrennungsluftzuführung ist eine Blendenöffnung 3 angeordnet. An die Blendenöffnung 3 schließt sich ein zum Ölbrenner koaxiales, an beiden Enden offenses Mischrohr 4 an. Das Mischrohr 4 besitzt einen ersten Abschnitt 5, der gegenüber der Blendenöffnung 3 erweitert ist, und einen zweiten Abschnitt 6, der gegenüber dem ersten Abschnitt 5 erweitert ist. Die Erweiterung 7 des Mischrohres 4 ist als Stufe ausgebildet und befindet sich etwa in der Mitte der Längerstreckung des Mischrohres 4. Das Mischrohr 4 ist in einer Brennkammer 8 angeordnet, die einen ersten Abschnitt 9, der etwa bis zur Erweiterung 7 des Mischrohres 4 reicht und einen zweiten Abschnitt 10 aufweist, der mit seiner Offnung 11 an einen in Fig. 1 nicht eingezeichneten Kessel anschließt.In the oil burner shown in FIG. 1, an oil atomization device 1 arranged in the longitudinal axis of the oil burner is coaxially surrounded by a combustion air supply which has an inner region 2 and an outer region 16. At the end of the inner area 2 of the combustion air supply, an aperture 3 is arranged. The aperture 3 is followed by a mixing tube 4 which is coaxial with the oil burner and is open at both ends. The mixing tube 4 has a first section 5 which is widened with respect to the diaphragm opening 3 and a second section 6 which is widened with respect to the first section 5. The extension 7 of the mixing tube 4 is designed as a step and is located approximately in the middle of the longitudinal extension of the mixing tube 4. The mixing tube 4 is arranged in a combustion chamber 8, which has a first section 9 which extends approximately to the extension 7 of the mixing tube 4 and has a second section 10, which connects with its opening 11 to a boiler, not shown in FIG. 1.

Der erste Abschnitt 9 der Brennkammer 8 weist einen radial äußeren Mantel 12, der als Leitung für die Zufuhr eines Gemisches aus Abgas und Verbrennungsluft dient, und einen daran innen anschließenden Ringraum 13 auf. Der Ringraum 13 verbindet den zweiten Abschnitt 10 der Brennkammer 8 mit der Eingangsöffnung des Mischrohres 4. Durch Injektorwirkung des aus der Blendenöffnung 3 austretenden Gasgemisches wird aus dem zweiten Abschnitt 10 der Brennkammer 8 heißes Abgas durch die achsparallelen Leitungen 18 und den Ringraum 13 um das Mischrohr 4 außen herum in dieses hineingesaugt.The first section 9 of the combustion chamber 8 has a radially outer jacket 12, which serves as a line for the supply of a mixture of exhaust gas and combustion air, and an annular space 13 adjoining it on the inside. The annular space 13 connects the second section 10 of the combustion chamber 8 to the inlet opening of the mixing tube 4. Due to the injector action of the gas mixture emerging from the orifice 3, hot exhaust gas is converted from the second section 10 of the combustion chamber 8 through the axially parallel lines 18 and the annular space 13 around the mixing tube 4 sucked into this outside.

Die Verbrennungsluftzuführung mit ihren Bereichen 2 und 16, welche die Ölzerstäubungseinrichtung 1 umgibt, wird mit einem Gemisch von aus dem Kessel entnommenem, abgekühltem Abgas und Verbrennungsluft beaufschlagt. In der Verbrennungsluftzuführung 2 und 16 befindet sich eine achsparallele Leitung 14, die bei Bedarf oder im Dauerbetrieb gasförmigen Brennstoff zuführt, und die über stirnseitige, radial ausgerichtete Offnungen 15 an der Blendenöffnung 3 ausmündet.The combustion air supply with its areas 2 and 16, which surrounds the oil atomization device 1, is acted upon by a mixture of cooled exhaust gas and combustion air removed from the boiler. Located in the combustion air supply 2 and 16 there is an axially parallel line 14, which supplies gaseous fuel when required or in continuous operation, and which opens out at the diaphragm opening 3 via front, radially aligned openings 15.

Das Ende des äußeren Bereiches 16 der Verbrennungsluftzuführung ist über eine Ringlochblende 17 mit zwei gegeneinander verdrehbaren, gelochten Ringen, mit dem äußeren Mantel 12 des ersten Abschnittes 9 der Brennkammer 8 verbunden. Der Mantel 12 ist seinerseits über radiale Leitungen, die zwischen den Achsparallelen Leitungen 18 angeordnet sind, mit dem Beginn des erweiterten, zweiten Abschnittes 6 des Mischrohres 4 verbunden. Durch Injektorwirkung an der stufenförmigen Erweiterung 7 des Mischrohres 4 vermischt sich das aus den radialen Leitungen austretende Gemisch aus abgekühltem Abgas des Kessels und Verbrennungsluft gut mit dem aus dem ersten Abschnitt 5 des Mischrohres 4 austretenden heißen Gasgemisch.The end of the outer region 16 of the combustion air supply is connected to the outer jacket 12 of the first section 9 of the combustion chamber 8 via an annular aperture 17 with two perforated rings which can be rotated relative to one another. The jacket 12 is in turn connected to the beginning of the enlarged, second section 6 of the mixing tube 4 via radial lines which are arranged between the axially parallel lines 18. Due to the injector action on the step-shaped extension 7 of the mixing tube 4, the mixture of cooled exhaust gas from the boiler and combustion air emerging from the radial lines mixes well with the hot gas mixture emerging from the first section 5 of the mixing tube 4.

Im ersten Abschnitt 5 des Mischrohres 4 wird ein unterstöchiometrisches Luftsauerstoff-Brennstoff-Verhältnis (λ≤1) eingestellt. Im zweiten Abschnitt 6 des Mischrohres 4 wird ein stöchiometrisches Luftsauerstoff-Brennstoff-Verhältnis (A=1) eingestellt. Im ersten Abschnitt 5 des Mischrohres 4 erfolgt die Regelung durch entsprechende Regelventile in der Luft- und/oder Ölzuleitung zum Brenner, wie an Hand der Fig. 2 weiter noch erläutert werden wird. Im zweiten Abschnitt 6 des Mischrohres 4 erfolgt die Regelung über die Ringlochblende 17.In the first section 5 of the mixing tube 4, a substoichiometric atmospheric oxygen-fuel ratio (λ≤1) is set. A stoichiometric atmospheric oxygen-fuel ratio (A = 1) is set in the second section 6 of the mixing tube 4. In the first section 5 of the mixing tube 4, regulation takes place by means of corresponding control valves in the air and / or oil supply line to the burner, as will be explained further with reference to FIG. 2. In the second section 6 of the mixing tube 4, the regulation takes place via the ring aperture 17.

Eine A-Sone AS, die wie in Fig. 2 gezeigt, am Ausgang des Kessels angeordnet sein kann, sorgt für ein möglichst genau stöchiometrisches Luftsauerstoff-Brennstoff-Verhältnis (λ = 1).An A-Sone AS, which can be arranged at the outlet of the boiler, as shown in FIG. 2, ensures a stoichiometric air-fuel ratio (λ = 1) that is as precise as possible.

Eine lonisationssonde IS überwacht die Verbrennungstemperatur in der Brennkammer 8. Im Bereich der Blendenöffnung 3 ist im Ölbrenner eine Zündeinrichtung 19 angeordnet.An ionization probe IS monitors the combustion temperature in the combustion chamber 8. An ignition device 19 is arranged in the area of the aperture 3 in the oil burner.

Wärmedämmschichten 20, 21 sorgen für eine Isolierung des äußeren Mantels 12 des ersten Abschnittes 9 der Brennkammer 8 gegenüber dem Ringraum 13.Thermal insulation layers 20, 21 provide insulation of the outer jacket 12 of the first section 9 of the combustion chamber 8 with respect to the annular space 13.

Bei Vollastbetrieb des erfindungsgemäßen Ölbrenners findet die Verbrennung vorwiegend außerhalb des Mischrohres 4, im zweiten Abschnitt 10 der Brennkammer 8 statt. Bei Teillastbetrieb, d.h. bei gedrosselter BrennstoffZufuhr, kann die Verbrennungsfront bis in die Nähe des Endes des ersten Abschnittes 5 des Mischrohres 4 zurückfallen. Die Vorteile der vollständigen und emissionsarmen Verbrennung bleiben in beiden Fällen erhalten.When the oil burner according to the invention is operated at full load, the combustion takes place predominantly outside the mixing tube 4, in the second section 10 of the combustion chamber 8. At partial load operation, i.e. with throttled fuel supply, the combustion front can fall back into the vicinity of the end of the first section 5 of the mixing tube 4. The advantages of complete and low-emission combustion remain in both cases.

In Fig. 2 sind die Gas-, Öl- bzw. Luftleitungen mit durchgehenden Linien und die elektrischen Steuerleitungen strichliert dargestellt. Der Ölbrenner ist in Fig. 2 mit B, der Kessel mit K und eine Prozeßsteuereinheit mit P bezeichnet. Man sieht eine Zuleitung von Verbrennungsluft, die in einem regelbaren Mischventil mit einer Leitung zur Rückführung von aus dem Kessel entnommenem Abgas (Pfeil NT-ART, Niedertemperatur-Abgasrückführung) vereinigt wird und über ein Gebläse G zum Ölbrenner B verläuft.In Fig. 2, the gas, oil and air lines are shown with solid lines and the electrical control lines with dashed lines. The oil burner is designated in FIG. 2 with B, the boiler with K and a process control unit with P. One sees a supply line of combustion air, which is combined in a controllable mixing valve with a line for the return of exhaust gas taken from the boiler (arrow NT-ART, low-temperature exhaust gas recirculation) and runs via a fan G to the oil burner B.

Eine Weitere Leitung zum Ölbrenner B dient für die Zuführ von Heizöl und führ über eine Pumpe PU und ein Regelventil zum Ölbrenner B.Another line to the oil burner B is used for the supply of heating oil and leads via a pump PU and a control valve to the oil burner B.

Eine nur im Fall der Beheizung mit gasförmigem Brennstoff vorhandene Gasleitung führt über ein Regelventil zum Ölbrenner B.A gas line that is only available in the case of heating with gaseous fuel leads via a control valve to the oil burner B.

Eine Antriebseinheit M treibt das Gebläse G und die Ölpumpe P an.A drive unit M drives the fan G and the oil pump P.

Die im Ölbrenner B stattfindende Rückführung von heißem, aus der Brennkammer stammendem Abgas ist durch einen Pfeil (HT-ARF, Hochtemperatur-Abgasrückführung) angedeutet.The return of hot exhaust gas coming from the combustion chamber in oil burner B is indicated by an arrow (HT-ARF, high-temperature exhaust gas recirculation).

Der Prozeßsteuereinheit P werden folgende Signale zugeführt: °

  • - Meßwert einer die Flammentemperatur in der Brennkammer überwachenden lonisationssonde IS,
  • - Meßwert einer den Restsauerstoffgehalt im Abgas des Kessels K feststellenden Ä-Sonde λS und
  • - Meßwert eines Temperaturfühlers TF im Kessel K.
The following signals are fed to the process control unit P: °
  • Measured value of an ionization probe IS monitoring the flame temperature in the combustion chamber,
  • - Measured value of an λS λS and the residual oxygen content in the flue gas from the boiler K
  • - Measured value of a temperature sensor TF in the boiler K.

Die Ausgangsleitungen der Prozeßsteuereinheit P führen zu einem Mischventil Luft-Kesselabgas, zur Antriebseinheit M, zum Regelventil in der Ölleitung und gegebenenfalls zum Regelventil in der Gasleitung. Eine weitere Ausgansleitung der Prozeßsteuereinheit P führt zur Zündung Z des Brenners (Zündeinrichtung 19 in Fig. 1).The output lines of the process control unit P lead to a mixing valve air-boiler exhaust gas, to the drive unit M, to the control valve in the oil line and possibly to the control valve in the gas line. Another outlet line of the process control unit P leads to the ignition Z of the burner (ignition device 19 in FIG. 1).

Claims (6)

1. Oil burner with an oil atomizing device (1), a surrounding combustion air feed (2, 16, 12) coaxial thereto and which opens into an aperture (3), also with a mixing tube (4) open at both ends for fuel, combustion air and flue gas, which is arranged downstream of the aperture (3) in a combustion chamber (8), wherein flue gas emanating directly from the combustion chamber is sucked round the outside of the mixing tube and into a first, upstream section (5) of the same, characterized in that both the air combustion air feed (2, 16, 12) surrounding the oil atomizing device (1) and a second section (6) of the mixing tube (4) displaced downstream, which is enlarged relative to the first section (5) thereof are connected to a line for feeding combustion air and a line for feeding cooled flue gas through a mixing device, for feeding a mixture of flue gas from the boiler and combustion air, wherein the line (16, 12) for feeding the mixture of flue gas and combustion air opens from outside into the mixing tube (4) in the region of its enlargement (7).
2. Oil burner according to claim 1, characterized in that a sub-stoichiometric ratio is established between air oxygen and fuel in the first section (5) of the mixing tube (4) disposed upstream and in the second section (6) of the mixing tube (4) a substantially stoichiometric ratio between air oxygen and fuel is established.
3. Oil burner according to claim 1, characterized in that a quantity regulating device, e.g. an annular stop (17), is provided in the line (16, 12) for feeding the mixture of flue gas and combustion air into the second section (6) of the mixing tube (4).
4. Oil burner according to claim 1, characterized in that the enlargement (7) of the mixing tube (4) is formed as a step and is located approximately in the middle of the longitudinal extent of the mixing tube (4).
5. Oil burner according to one of claims 1 to 4, characterized in that the combustion chamber (8) comprises a first section (9) extending approximately up to the enlargement (7) of the mixing tube (4) with a radially outer jacket (12) traversed by the mixture of flue gas and combustion air and an annular space (13) disposed internally thereto for the return feed into the mixing tube (4) of flue gas emanating directly from the combustion chamber (8) and in that the outer jacket (12) is connected to the mixing tube (4) in the region of its enlargement (7) via lines radially directed relative to the mixing tube (4).
6. Oil burner according to claims 3 and 5, characterized in that the line (2, 16) for feeding the mixture of flue gas and combustion air is connected in its radially outer region (16) to the radially outer jacket (12) of the first section (9) of the combustion chamber (8) through an adjustable outlet (17).
EP19860890355 1985-12-23 1986-12-23 Oil burner Expired - Lifetime EP0227637B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3744/85 1985-12-23
AT374485A AT387838B (en) 1985-12-23 1985-12-23 OIL BURNER

Publications (3)

Publication Number Publication Date
EP0227637A2 EP0227637A2 (en) 1987-07-01
EP0227637A3 EP0227637A3 (en) 1988-09-21
EP0227637B1 true EP0227637B1 (en) 1990-03-14

Family

ID=3554810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860890355 Expired - Lifetime EP0227637B1 (en) 1985-12-23 1986-12-23 Oil burner

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EP (1) EP0227637B1 (en)
AT (1) AT387838B (en)
DE (1) DE3669580D1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3822004A1 (en) * 1988-06-30 1990-01-04 Babcock Werke Ag BURNER
ATE199452T1 (en) * 1993-12-18 2001-03-15 Deutsch Zentr Luft & Raumfahrt ADJUSTABLE BLUE BURNER
AT407907B (en) * 1997-05-21 2001-07-25 Oemv Ag BURNERS, ESPECIALLY FOR HEATING OILS
DE102010049513B4 (en) 2010-10-25 2012-06-06 Herbert Naumann Internal combustion engine with working and auxiliary cylinders
CN104807013B (en) * 2015-05-08 2017-12-19 陈怀超 Burner tip and there is its burner and steam pyrolysis combustion of hydrogen method
DE102020203423A1 (en) * 2020-03-17 2021-09-23 Dometic Sweden Ab Heating device, recreational vehicle with heating device and method for heating fluids in a recreational vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540821A (en) * 1968-04-01 1970-11-17 Exxon Research Engineering Co Flue gas recirculation burner
US3868211A (en) * 1974-01-11 1975-02-25 Aqua Chem Inc Pollutant reduction with selective gas stack recirculation
US4160526A (en) * 1977-03-24 1979-07-10 Flynn Burner Corporation Liquid fuel atomizing nozzle
DE3035707A1 (en) * 1980-09-22 1982-04-08 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln OIL AND GAS BURNERS FOR INSTALLATION IN HEATING AND STEAM GENERATING BOILERS
DE3241730A1 (en) * 1982-11-11 1984-05-17 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5300 Bonn GASIFICATION OIL BURNER WITH AN OIL SPRAYING DEVICE

Also Published As

Publication number Publication date
EP0227637A2 (en) 1987-07-01
DE3669580D1 (en) 1990-04-19
AT387838B (en) 1989-03-28
EP0227637A3 (en) 1988-09-21
ATA374485A (en) 1988-08-15

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