EP1162403B1 - Evaporation chamber for premix fuel oil burner - Google Patents

Evaporation chamber for premix fuel oil burner Download PDF

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Publication number
EP1162403B1
EP1162403B1 EP01890159A EP01890159A EP1162403B1 EP 1162403 B1 EP1162403 B1 EP 1162403B1 EP 01890159 A EP01890159 A EP 01890159A EP 01890159 A EP01890159 A EP 01890159A EP 1162403 B1 EP1162403 B1 EP 1162403B1
Authority
EP
European Patent Office
Prior art keywords
evaporator chamber
jacket
evaporator
burner tube
combustion gases
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
Application number
EP01890159A
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German (de)
French (fr)
Other versions
EP1162403A1 (en
Inventor
Josef Goiginger
Thomas Metz
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.)
Windhager Zentralheizung AG
Original Assignee
Windhager Zentralheizung AG
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Filing date
Publication date
Application filed by Windhager Zentralheizung AG filed Critical Windhager Zentralheizung AG
Priority to AT01890159T priority Critical patent/ATE277327T1/en
Publication of EP1162403A1 publication Critical patent/EP1162403A1/en
Application granted granted Critical
Publication of EP1162403B1 publication Critical patent/EP1162403B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/44—Preheating devices; Vaporising devices
    • F23D11/441—Vaporising devices incorporated with burners

Definitions

  • the invention relates to an evaporator chamber according to the Preamble of claim 1.
  • a corresponding evaporator chamber is in principle from a Burner according to WO 0012935 A known.
  • Burner according to WO 0012935 A known.
  • the burner tube exits the oil vapor-air mixture is ignited and brought to combustion.
  • the for the evaporation of the heating oil required heat energy is in the starting phase by the electrical resistance heating generated and during normal operation by heating the Evaporator chamber on the redirected hot combustion gases or Flames supplied.
  • the known evaporator chamber has a relatively small Thermal efficiency of the electric heater for evaporation and needed therefore a higher electrical connection power. Moreover, a relative must also greater proportion of the hot combustion gases to the outside of the evaporator chamber be redirected to the sufficient in continuous operation To ensure evaporation and preheating of the heating oil.
  • From DE 42 38 718 A is the two-part design of the evaporator chamber known.
  • the also provided here electrical resistance heating is provided in the form of tubular heaters in at the bottom of the lower part Inserted grooves. This base is from the attached coat by a insulating liner separately, so that the heater essentially only for Heating of the lower part is used.
  • JP 59009418 A is in a likewise two-part evaporator chamber the heating in downwardly open grooves one opposite the cup-shaped Lower part thickened shell part attached.
  • the object of the invention is therefore to an evaporator chamber create, with high utilization of the supplied electrical energy for the Evaporation task a sheltered housing of electrical resistance heating ensures and even during continuous operation a uniform Heating the inside of the evaporator chamber while avoiding Soothers resulting in overheating points as well as this Continuous operation, the introduction sufficiently high, z. B. in the order of magnitude of 350 ° C lying heating temperatures of the evaporator chamber from the Combustion ensures.
  • the electric heater is through the closed channel protected from external influences and ensures a favorable heating of both parts of the evaporator chamber.
  • the evaporator chamber by far enclosing isolation ring is in continuous operation the proportion of heating the evaporator chamber from the burner tube to be derived reduced hot combustion gases and a cooling of this Gases on heat exchanger surfaces of a boiler od.
  • the burner is installed, largely avoided.
  • the jacket of the evaporator chamber be formed according to claim 2.
  • a heating boiler 1 is an oil evaporator premix burner. 2 used, consisting essentially of an air supply device with blower 3, a fuel supply device 4 and an evaporator chamber 5, a bottom opening 6 for the supply of fuel to a nebulizer having.
  • a burner tube 8 attached, which has openings in its jacket and the is surrounded in the lower part of a Umleitschürze 9, which is a part the combustion gases down to the jacket of the evaporator chamber. 5 derives.
  • an insulating ring 10 is attached, the cooling of these bypassed combustion gases at the heat exchanger surfaces prevented the boiler.
  • the evaporator chamber of interest here consists according to FIGS. 2 and 3 of a bottom part 11 and a jacket 12, which are tightly connected together are and one of annular grooves 13, 14 of the two parts enclosed Include channel 15 in which - embedded in a heat-conductive mass - an electrical resistance heater is housed, the terminal ends 16 are led out to one side, the lead-out of FIG. 3 via a side collar 17 and according to FIG. 4 over again between the bottom 11th and sheath 12 enclosed, each other to channels complementary grooves follows.
  • the interior of the shell 12 is stepped several times.
  • this shell 12 is a groove 18 for receiving the lower end of the Burner tube 8 is provided, which at the upper end with a bevel 19 extends inwardly, wherein the inserted burner tube 8 through in holes 20 inserted pins or screws can be secured.
  • a bevel 19 extends inwardly, wherein the inserted burner tube 8 through in holes 20 inserted pins or screws can be secured.
  • the facing the cavity 23 of the evaporator chamber surfaces of the Bodens 11 and the shell 12 are made with a surface coating providing a radiation emissivity enhancing material.
  • the evaporator chamber 5 is at the bottom of the boiler 1 with through openings 24 inserted Fastened screws.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

Made as a cylindrical shell from a lower part and a jacket joined on, a vaporizer chamber (5) has a base opening for feeding in fuel and air and a resistor heating device inserted in ring grooves. A cylindrically hollow burner tube (8) fits on the jacket. Outer guiding devices (9) guide part of the combustion gases from the burner tube to the jacket. The lower part forms the base of the shell.

Description

Die Erfindung bezieht sich auf eine Verdampferkammer gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to an evaporator chamber according to the Preamble of claim 1.

Eine entsprechende Verdampferkammer ist dem Prinzip nach aus einem Brenner nach der WO 0012935 A bekannt. Bei derartigen Brennern wird die nach Leistung des Brenners dosierte Ölmenge in der Verdampferkammer verteilt, durch Wärmezufuhr zur Verdampfung gebracht und mit der von einem Gebläse zugeführten Verbrennungsluft noch innerhalb des auch unter der Bezeichnung "Flammenhafter" bekannten Brennerrohres gemischt. An den Wandungsöffnungen des Brennerrohres tritt das Öldampf-Luftgemisch aus, wird gezündet und zur Verbrennung gebracht. Die für die Verdampfung des Heizöles benötigte Wärmeenergie wird in der Startphase durch die elektrische Widerstandsheizung erzeugt und während des Normalbetriebes durch Aufheizung der Verdampferkammer über die umgeleiteten heißen Verbrennungsgase bzw. Flammen zugeführt. Die bekannte Verdampferkammer hat einen relativ geringen Wärmewirkungsgrad der Elektroheizung für die Verdampfung und benötigt daher eine höhere elektrische Anschlußleistung. Überdies muß auch ein relativ größerer Anteil der heißen Verbrennungsgase zu der Außenseite der Verdampferkammer umgeleitet werden, um im Dauerbetrieb die ausreichende Verdampfung und Vorerhitzung des Heizöles zu gewährleisten.A corresponding evaporator chamber is in principle from a Burner according to WO 0012935 A known. In such burners is the distributed according to the performance of the burner metered amount of oil in the evaporator chamber, brought to evaporation by heat and with that of a Blower supplied combustion air still within the well under the Name "Flammenhafte" known burner tube mixed. To the Wandungsöffnungen the burner tube exits the oil vapor-air mixture is ignited and brought to combustion. The for the evaporation of the heating oil required heat energy is in the starting phase by the electrical resistance heating generated and during normal operation by heating the Evaporator chamber on the redirected hot combustion gases or Flames supplied. The known evaporator chamber has a relatively small Thermal efficiency of the electric heater for evaporation and needed therefore a higher electrical connection power. Moreover, a relative must also greater proportion of the hot combustion gases to the outside of the evaporator chamber be redirected to the sufficient in continuous operation To ensure evaporation and preheating of the heating oil.

Aus der DE 42 38 718 A ist die zweiteilige Ausführung der Verdampferkammer bekannt. Die auch hier vorgesehene elektrische Widerstandsheizung ist in Form von Rohrheizkörpern in an der Unterseite des Unterteiles vorgesehene Nuten eingesetzt. Dieser Unterteil ist vom angesetzten Mantel durch eine isolierende Zwischenlage getrennt, so daß die Heizung im wesentlichen nur zur Erhitzung des Unterteiles dient. From DE 42 38 718 A is the two-part design of the evaporator chamber known. The also provided here electrical resistance heating is provided in the form of tubular heaters in at the bottom of the lower part Inserted grooves. This base is from the attached coat by a insulating liner separately, so that the heater essentially only for Heating of the lower part is used.

Nach der JP 59009418 A ist bei einer ebenfalls zweiteiligen Verdampferkammer die Heizung in nach unten offenen Nuten eines gegenüber dem schalenförmigen Unterteil verdickten Mantelteiles angebracht.According to JP 59009418 A is in a likewise two-part evaporator chamber the heating in downwardly open grooves one opposite the cup-shaped Lower part thickened shell part attached.

Zur Verbesserung des Wärmeüberganges der heißen Verbrennungsgase auf den Mantel der Verdampferkammer ist es schließlich aus der EP 0 220 384 A bekannt, diesen Mantel mit die Wärmeübergangsfläche vergrößernden Rippen zu versehen.To improve the heat transfer of the hot combustion gases Finally, it is EP 0 220 on the jacket of the evaporator chamber 384 A known to enlarge this coat with the heat transfer surface To provide ribs.

Aufgabe der Erfindung ist es demnach, eine Verdampferkammer zu schaffen, die bei hoher Ausnützung der zugeführten elektrischen Energie für die Verdampfungsaufgabe eine geschützte Unterbringung der elektrischen Widerstandsheizung gewährleistet und auch beim Dauerbetrieb eine gleichmäßige Erwärmung der Innenseite der Verdampferkammer unter Vermeidung von Versottungen ergebenden Überhitzungsstellen ermöglicht sowie bei diesem Dauerbetrieb die Einbringung hinreichend hoher, z. B. in der Größenordnung von 350 °C liegender Erhitzungstemperaturen der Verdampferkammer aus der Verbrennung sichert.The object of the invention is therefore to an evaporator chamber create, with high utilization of the supplied electrical energy for the Evaporation task a sheltered housing of electrical resistance heating ensures and even during continuous operation a uniform Heating the inside of the evaporator chamber while avoiding Soothers resulting in overheating points as well as this Continuous operation, the introduction sufficiently high, z. B. in the order of magnitude of 350 ° C lying heating temperatures of the evaporator chamber from the Combustion ensures.

Die gestellte Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst.The object is achieved by the features of claim 1 solved.

Bei der erfindungsgemäßen Ausführung ist die Elektroheizung durch den geschlossenen Kanal vor äußeren Einflüssen geschützt und gewährleistet eine günstige Erwärmung beider Teile der Verdampferkammer. Durch den die Verdampferkammer mit Abstand umschließenden Isolationsring wird beim Dauerbetrieb der Anteil der zur Erhitzung der Verdampferkammer vom Brennerrohr abzuleitenden heißen Verbrennungsgase verringert und eine Abkühlung dieser Gase an Wärmetauscherflächen eines Kessels od. dgl., in den der Brenner eingebaut wird, weitgehend vermieden. In the embodiment of the invention, the electric heater is through the closed channel protected from external influences and ensures a favorable heating of both parts of the evaporator chamber. Through the the evaporator chamber by far enclosing isolation ring is in continuous operation the proportion of heating the evaporator chamber from the burner tube to be derived reduced hot combustion gases and a cooling of this Gases on heat exchanger surfaces of a boiler od. Like., In the burner is installed, largely avoided.

Zur Verbesserung des Wärmeüberganges kann der Mantel der Verdampferkammer gemäß Anspruch 2 ausgebildet werden.To improve the heat transfer, the jacket of the evaporator chamber be formed according to claim 2.

Die üblicherweise für die Herstellung der Verdampferkammer eingesetzten Materialien, nämlich hitzebeständiger Stahlguß oder spanabhebend bearbeiteter hitzebeständiger Stahl, haben an sich einen relativ geringen Emissionsgrad für Strahlungswärme. Es wird deshalb eine Weiterbildung gemäß Anspruch 3 vorgesehen. Diese Oberflächenbeschichtung kann eine Pulverbeschichtung oder auch eine möglichst dunkle Oxidationsschicht sein.The commonly used for the production of the evaporator chamber Materials, namely heat-resistant cast steel or machined machined heat-resistant steel, have a relatively low emissivity per se for radiant heat. It is therefore a development according to Claim 3 provided. This surface coating can be a powder coating or even a darkest possible oxidation layer.

Weitere Einzelheiten und Vorteile des Erfindungsgegenstandes entnimmt man der nachfolgenden Zeichnungsbeschreibung.Further details and advantages of the subject invention takes one of the following description of the drawing.

In der Zeichnung ist der Erfindungsgegenstand beispielsweise veranschaulicht. Es zeigen

Fig. 1
in schematisierter Darstellungsweise einen Teillängsschnitt durch einen mit einem Ölverdampfer-Vormischbrenner ausgestatteten Heizungskessel,
Fig. 2
eine Ausführungsform der Verdampferkammer im Längsschnitt nach der Linie II-II der Fig. 3,
Fig. 3
eine Draufsicht auf die Verdampferkammer nach Fig. 2 und
Fig. 4
eine Ausführungsvariante des Ausleitungsbereiches der Heizeinrichtung in der Fig. 3 entsprechender Darstellungsweise.
In the drawing, the subject invention is illustrated, for example. Show it
Fig. 1
in a schematic representation, a partial longitudinal section through a boiler equipped with an oil evaporator premix burner,
Fig. 2
an embodiment of the evaporator chamber in a longitudinal section along the line II-II of Fig. 3,
Fig. 3
a plan view of the evaporator chamber of FIG. 2 and
Fig. 4
a variant of the Ausleitungsbereiches the heater in the Fig. 3 corresponding representation.

In einen Heizungskessel 1 ist ein Ölverdampfer-Vormischbrenner 2 eingesetzt, der im wesentlichen aus einer Luftzuführungseinrichtung mit Gebläse 3, einer Brennstoffzufuhreinrichtung 4 und einer Verdampferkammer 5 besteht, die eine Bodenöffnung 6 für die Brennstoffzufuhr zu einem Zerstäuber aufweist. An die Verdampferkammer 5 ist innerhalb des Verbrennungsraumes 7 ein Brennerrohr 8 angesetzt, das in seinem Mantel Öffnungen aufweist und das im unteren Bereich von einer Umleitschürze 9 umgeben ist, welche einen Teil der Verbrennungsgase nach unten um den Mantel der Verdampferkammer 5 ableitet. Mit Abstand von dieser Schürze 9 ist ein Isolationsring 10 angebracht, der eine Abkühlung dieser umgeleiteten Verbrennungsgase an den Wärmetauscherflächen des Kessels verhindert.In a heating boiler 1 is an oil evaporator premix burner. 2 used, consisting essentially of an air supply device with blower 3, a fuel supply device 4 and an evaporator chamber 5, a bottom opening 6 for the supply of fuel to a nebulizer having. To the evaporator chamber 5 is within the combustion chamber. 7 a burner tube 8 attached, which has openings in its jacket and the is surrounded in the lower part of a Umleitschürze 9, which is a part the combustion gases down to the jacket of the evaporator chamber. 5 derives. At a distance from this skirt 9, an insulating ring 10 is attached, the cooling of these bypassed combustion gases at the heat exchanger surfaces prevented the boiler.

Die hier interessierende Verdampferkammer besteht nach den Fig. 2 und 3 aus einem Bodenteil 11 und einem Mantel 12, die miteinander dicht verbunden sind und einen von Ringnuten 13, 14 der beiden Teile umschlossenen Kanal 15 einschließen, in dem - in eine wärmeileitende Masse eingebettet - eine elektrische Widerstandsheizung untergebracht wird, deren Anschlußenden 16 nach einer Seite herausgeführt werden, wobei die Herausführung nach Fig. 3 über einen Seitenbund 17 und nach Fig. 4 über wieder zwischen Boden 11 und Mantel 12 eingeschlossene, einander zu Kanälen ergänzende Nuten folgt. Der Innenraum des Mantels 12 ist mehrfach abgestuft. Im oberen Randbereich dieses Mantels 12 ist eine Nut 18 zur Aufnahme des unteren Endes des Brennerrohres 8 vorgesehen, die sich am oberen Ende mit einer Abschrägung 19 nach innen erweitert, wobei das eingetzte Brennerrohr 8 durch in Bohrungen 20 eingesetzte Stifte oder Schrauben gesichert werden kann. Außenseitig sind der Mantel 12 und gemäß Fig. 2 auch der Boden 11 mit Leitrippen 21, 22 bestückt, um den Wärmeübergang von den heißen Verbrennungsgasen zu verbessern. Die zum Hohlraum 23 der Verdampferkammer weisenden Flächen des Bodens 11 und des Mantels 12 sind mit einer Oberflächenbeschichtung aus einem den Strahlungsemissionsgrad erhöhenden Material versehen. Die Verdampferkammer 5 ist am Boden des Kessels 1 mit durch Öffnungen 24 eingesetzten Schrauben befestigt.The evaporator chamber of interest here consists according to FIGS. 2 and 3 of a bottom part 11 and a jacket 12, which are tightly connected together are and one of annular grooves 13, 14 of the two parts enclosed Include channel 15 in which - embedded in a heat-conductive mass - an electrical resistance heater is housed, the terminal ends 16 are led out to one side, the lead-out of FIG. 3 via a side collar 17 and according to FIG. 4 over again between the bottom 11th and sheath 12 enclosed, each other to channels complementary grooves follows. The interior of the shell 12 is stepped several times. In the upper edge area this shell 12 is a groove 18 for receiving the lower end of the Burner tube 8 is provided, which at the upper end with a bevel 19 extends inwardly, wherein the inserted burner tube 8 through in holes 20 inserted pins or screws can be secured. Are on the outside the jacket 12 and according to FIG. 2 also the bottom 11 equipped with guide ribs 21, 22, to improve the heat transfer from the hot combustion gases. The facing the cavity 23 of the evaporator chamber surfaces of the Bodens 11 and the shell 12 are made with a surface coating providing a radiation emissivity enhancing material. The evaporator chamber 5 is at the bottom of the boiler 1 with through openings 24 inserted Fastened screws.

Claims (3)

  1. An evaporator chamber for the evaporation of extra-light fuel oil in oil evaporator pre-mix burners, which evaporator chamber (5) is formed in the basic form of a cylindrical dish (11, 12) in two parts consisting of a bottom part (11) and an attached jacket (12), has a bottom opening (6) for the fuel and air supplies and, in the bottom zone, an electrical resistance heating system inserted in annular grooves (13, 14), and to the jacket (12) of which there can be attached a hollow-cylindrical burner tube (8) which itself has wall openings, external guide means (9) guiding some of the hot combustion gases from the burner tube (8) to the jacket (12) of the evaporator chamber (5), characterised in that the bottom part of the evaporator chamber (5) is constructed as the bottom (11) of the dish, the annular grooves (13, 14) for the resistance heating system are provided in open relationship to one another in the bottom (11) and jacket (12) and together form a closed duct (15), and in that an insulation ring (10) enclosing the evaporator chamber (5) in spaced relationship is provided to concentrate the heat delivery of the hot combustion gases on to the evaporator chamber (5).
  2. An evaporator chamber according to claim 1, characterised in that the jacket (12) of the evaporator chamber (5) is provided with ribs (21) which increase the heat transfer surface to that part of the hot combustion gases which is guided away from the burner tube (8).
  3. An evaporator chamber according to claims 1 and 2, characterised in that at least the inner surfaces of the base (11) and jacket (12) of the evaporator chamber (5) have a surface coating which increases the degree of radiation emission.
EP01890159A 2000-06-07 2001-05-25 Evaporation chamber for premix fuel oil burner Expired - Lifetime EP1162403B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT01890159T ATE277327T1 (en) 2000-06-07 2001-05-25 EVAPORATION CHAMBER FOR OIL EVAPORATOR PREMIX BURNER

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0099400A AT408904B (en) 2000-06-07 2000-06-07 EVAPORATOR CHAMBER FOR OIL EVAPORATOR PRE-MIX BURNER
AT9942000 2000-06-07

Publications (2)

Publication Number Publication Date
EP1162403A1 EP1162403A1 (en) 2001-12-12
EP1162403B1 true EP1162403B1 (en) 2004-09-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01890159A Expired - Lifetime EP1162403B1 (en) 2000-06-07 2001-05-25 Evaporation chamber for premix fuel oil burner

Country Status (3)

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EP (1) EP1162403B1 (en)
AT (2) AT408904B (en)
DE (1) DE50103710D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH696153A5 (en) * 2003-06-11 2007-01-15 Toby Ag Burner for liquid fuels.
WO2005098315A1 (en) * 2004-04-06 2005-10-20 Toby Ag Electrically heatable evaporation chamber and method for the production thereof
CH700919B1 (en) 2007-10-01 2010-11-15 Toby Ag Burner with an evaporator chamber.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1133821A (en) * 1978-06-28 1982-10-19 Hajime Satoda Combustion apparatus
JPS599418A (en) * 1982-07-07 1984-01-18 Sanyo Electric Co Ltd Burner body of vaporizing type burner
DE3526866A1 (en) * 1985-07-26 1987-02-05 Kernforschungsanlage Juelich EVAPORATOR FOR LIQUID FUEL TO GENERATE A FUEL-AIR MIXTURE
DE4238718A1 (en) * 1992-11-17 1994-05-19 Hoval Interliz Ag Vaduz Neugut Equipment for burning heating oil - has pressureless oil introduced into inclined channel and flowing under gravity to be evaporated before channel end by external heating with air exclusion
WO2000012935A1 (en) * 1998-09-01 2000-03-09 Toby Ag Burner for liquid fuel

Also Published As

Publication number Publication date
AT408904B (en) 2002-04-25
ATE277327T1 (en) 2004-10-15
EP1162403A1 (en) 2001-12-12
ATA9942000A (en) 2001-08-15
DE50103710D1 (en) 2004-10-28

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