EP0158045B1 - Adjustable burner equipment for a gaseous fuel - Google Patents

Adjustable burner equipment for a gaseous fuel Download PDF

Info

Publication number
EP0158045B1
EP0158045B1 EP85101655A EP85101655A EP0158045B1 EP 0158045 B1 EP0158045 B1 EP 0158045B1 EP 85101655 A EP85101655 A EP 85101655A EP 85101655 A EP85101655 A EP 85101655A EP 0158045 B1 EP0158045 B1 EP 0158045B1
Authority
EP
European Patent Office
Prior art keywords
gas
wall
closure member
air
supply line
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
Application number
EP85101655A
Other languages
German (de)
French (fr)
Other versions
EP0158045A2 (en
EP0158045A3 (en
Inventor
Johannes Wilhelmus Graat
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.)
Smit Ovens BV
Original Assignee
Smit Ovens BV
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 Smit Ovens BV filed Critical Smit Ovens BV
Priority to AT85101655T priority Critical patent/ATE43701T1/en
Publication of EP0158045A2 publication Critical patent/EP0158045A2/en
Publication of EP0158045A3 publication Critical patent/EP0158045A3/en
Application granted granted Critical
Publication of EP0158045B1 publication Critical patent/EP0158045B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air

Definitions

  • a gas burner is known from US Pat. No. 1,350,051, in which the gas and air supply can be changed into a gas-air mixing chamber, to which the actual flame area immediately adjoins.
  • the variability is made possible by a spindle-like device which has slides on its outside, which open or close the gas and air supply lines, which are connected in series and each end peripherally on a tube, by sliding them off.
  • the gas and air supply are changed at the same time in a set ratio.
  • secondary air inlets are provided at the end of the actual combustion chamber.
  • the general task is to maintain stoichiometric combustion as far as possible over the intended load range, at the same time to ensure thorough mixing of the incoming fuel and air quantities and to ensure safe operation.
  • the gas supply is relatively difficult to meter, since the cross section of the peripherally arriving gas supply line is changed relatively strongly even with a small adjustment distance.
  • the feed channels it is not readily possible to make the feed channels as large as desired, since the incoming gas is generally under an overpressure of 3 - 10 bar and therefore the cross-section of the line to be adjusted is only a relatively small maximum for a certain gas burner output may have.
  • a spindle provided with a relatively fine thread is provided for adjusting the gas-air supply.
  • the known design principle is not readily transferable to a burner device that works with a servo motor, even if another control mechanism is shown in FIG. 3 of the known device, which control mechanism can possibly be adopted in a similar manner.
  • a burner device of the type mentioned is known from DE-PS-1 551 803.
  • the joint control of the outflow cross-sections of air and fuel is carried out by a movable rocker arm, which shifts two control slides in the axial direction.
  • One control slide controls the outflow cross section of the air by displacing a disk lying in a conically tapering air supply line, and the other slide controls the gas outlet cross section by displacing a cone in the fuel supply line.
  • a disadvantage of the aforementioned burner device is that the joint adjustability takes place via pins guided in elongated holes in the rocker, via cam disks and via lever guides. Thus, a relatively complicated and wear-prone mechanism has been used, which will operate imprecisely after a short period of operation.
  • a gas supply line is provided which is arranged centrally around the adjustment axis and into which an orifice wall provided with an opening is preferably installed, which can be adjusted with the aid of a very flat-angle closing cone.
  • the opening angle of the closing cone is between 1 and 15 ° (old degree), the cone pitch preferably being constant.
  • the cone wall is provided with a large and / or at the end with a smaller, possibly reduced to zero opening angle at the tip.
  • the cone itself can be relatively long, so that a very sensitive and only slowly changing cross-section change is possible over a relatively long adjustment distance. This The principle is therefore particularly suitable for the use of servomotors.
  • a burner device is known from DE-A-3 113 511, in which the air is supplied via an air supply line, which creates a connection between the end of the air supply line and the mixing chamber via swirl-generating devices.
  • the swirl-generating devices are simultaneously designed as cross-sectional channels. This principle can also be used with advantage in the present burner device if the cross-section-changeable air supply line ends at the periphery of the mixing chamber.
  • swirl-generating air ducts which are variable in cross-section and which form the connection between the end of the air supply line and the gas-air mixing chamber are embedded in the wall surrounding the gas-air mixing chamber. These are round or angular channels cut tangentially into the wall, as are known in principle from DE-OS 3 113 511 mentioned.
  • Natural gas or a related gas is primarily provided as the fuel for the burner device. However, pure gases such as methane, propane or butane and town gas are also suitable. The use of a coal dust-air or oil-air mixture cannot be ruled out.
  • FIGS. 1a and 1 show in cross section a burner device of the type 100,000 kcal / h, for example when burning natural gas in a boiler for an apartment building.
  • the burner device generally designated 1 adjoins a boiler wall 2.
  • the burner device has a three-part housing 3.
  • the housing 3 is divided into the following parts: a head part 31 which is supported on the inside of the boiler wall 2, an elongated tube part 32 and a drum part 33 which partially surrounds the tube part 32 and which adjoins the rear of the boiler wall 2 and essentially serves to supply air.
  • the parts 31-33 are essentially concentric as a rotating body to the cross section shown and along an axis A.
  • the drum part 33 encloses a round opening 4, which is incorporated into the boiler wall 2, with a round wall 5, which closes at the rear by a rear wall 7 provided with a central opening 6.
  • a relatively large dimensioned cylindrical connector 8 is placed on the wall 5 of the drum part 33.
  • the already mentioned tube part 32 is also firmly inserted into the opening 6.
  • the tube part 32 which is also cylindrical in shape, has a substantially smaller diameter than the drum part 33.
  • the end of the tube part 32 protrudes from the drum part 33 and is closed by a rear wall 10 which is provided with an opening 11.
  • the tube part 32 is also concentric to the axis A and ends just before the boiler wall opening 4 in a flange 12 of a gas-air mixing chamber 13 which is enclosed by a wall 18.
  • the gas-air mixing chamber 13 ends at its end face within the boiler in a flange 15, to which the walls of the head part 31 support and establish a connection to the boiler wall 2.
  • the tube part 32 is designed as a gas supply line 16. It is provided at its projecting end 9 with a gas inlet 16 'through which the fuel gas, for. B. natural gas flows in and can flow unhindered inside the tube part 32 up to a diaphragm wall 17.
  • a rotatable diaphragm cylinder 51 with a circular opening 51 ' is installed in the tube part 32. Diaphragm cylinder 51 and opening 51 'can be rotated against each other in the manner of a diaphragm setting so that a desired amount of gas can enter the tube part 32 through the connecting piece 16' and the opening 51 '.
  • the panel wall 17 is provided with an adjustment opening 20 which is exactly concentric to the axis A and which is the only opening within the panel wall 17.
  • the opening 20 is cut somewhat conically into the diaphragm wall 17, specifically diverging towards the opening of the tube part 32.
  • the gas supply through the tube part 32 can be adjusted with the aid of a closing cone 21 forming part of a slide-like device.
  • the closing cone 21 can be displaced along the axis A within the adjustment opening 20, the cross-section being changeable depending on the position of the closing cone 21 from a maximum cross section to a minimum or to a complete closure.
  • the interaction of the adjustment opening 20 and the closing cone 21 which is essential for the invention is made possible by an adjustable slide rod 22 which projects through the tube part 32 and the end of which is movable in a slide bearing 23 installed in the rear wall 10 of the tube part 32.
  • the slide rod 22 is screwed to a perforated first wall disc 24, which in turn is firmly connected to a cylindrical can part 25.
  • the base of the can part 25 is open and thus forms a fuel passage 30.
  • the end of the cylindrical can part 25 is formed by a further, second wall disc 26, which is provided with a central gas outlet opening 27.
  • further openings can be provided in the wall disk 26.
  • the box part 25 is therefore rigidly connected to the locking cone 21 via the slide rod 22.
  • the can part 25 can move axially relative to the tube part 32.
  • a burner device 1 for a gas burner which is provided with a gas supply line 16, which begins at the nozzle 16 ', continues into the tube part 32, can be changed in cross-section with the aid of the arrangement of the adjustment opening 20 and the closing cone 21, and which ends in the gas outlet opening 27 in the gas-air mixing chamber 13.
  • the air supply takes place through the air supply line 8, continues into the interior of the drum part 33 and leads through the peripheral partial opening 4 left open by the gas-air mixing chamber 13 into the head part 31. From there, the air passes through tangentially set, slit-like air channels 28 into the gas-air mixing chamber 13 at a relatively high speed and mixes there with the gas.
  • the gas-air mixture then emerges from an opening 29 of the chamber 13 and can be ignited with the aid of an ignition device 40 (shown in broken lines).
  • the closing cone 21 surrounding the slide rod 22 is produced, for example, as a turned part with a cone opening angle between 1 and 15 °, preferably between 3.5 and 5 °. Via a flange connection 41, the cone 21 is removably connected to a casing tube 42, which continues through the plain bearing 23. The part of the slide rod 22 with the casing tube 42 protruding through the opening 11 is moved back and forth with the aid of a servo motor 44. As can be seen from FIG. 2, a sleeve 45 which is placed on the casing tube 42 for this purpose is arranged displaceably within a sliding sleeve 45 '.
  • a shutdown contact 46 presses a switch 46 'and ensures an emergency shutdown if a certain minimum position of the closing cone 21 is exceeded. This measure prevents the adjustment opening 20 from being damaged by the closing cone.
  • a buffer spring 47 is installed in a groove of the sliding sleeve 45 'in such a way that buffering takes place when the slide rod 22 is adjusted against the minimum position on the spring 47. The slide rod 22, which is driven by the servo motor 44, is thus cushioned and secured in the region of its end position.
  • an air pressure monitor 50 monitors the air pressure within the drum part 33, which also ensures operational safety, because if the pressure drops, the gas supply is also switched off.
  • the can part 25 By actuating the slide rod 22 and the closing cone 21, as described, the can part 25 is simultaneously moved back and forth in front of the air channels 28 and thus ensures a change in the air supply.
  • the can part 25 therefore forms the further member connected to the closing cone 21, with which the air supply can be changed.
  • the closing cone 21 is preferably designed as the tip of the slide rod 22 which is movably arranged in the interior of the tube part 32. However, it is also conceivable that the closing cone 21 is moved in isolation via a separate drive.
  • the tip of the closing cone 21 is connected to two series-connected wall disks 24 and 26, one of which has a circular ring shape and the other a disk shape in which there is a central outlet opening 27 in the area of the cone tip.
  • the two wall disks 24 and 26 are movable together with the cone 21.
  • the diaphragm wall 17, which is penetrated by the closing cone 21 is rigidly arranged within the non-movable tube part 32.
  • the outer shell shape and the opening angle of the cone 21 are essentially adapted to the needs of the adjustment speed and adjustment distance.
  • a slim cone shape enables a very exact measurement of the gas supply even at higher gas pressure.
  • trumpet-shaped cone shells or those with step adjustment can also be used.
  • FIG. 3 shows a closing cone 121 which has a shape which is modified compared to the above-described embodiment. At its tip 36 it is more converging; there its opening angle is approximately between 10 and 30 °. On the other hand, it is flattened at its end 37, i. H. it takes the form of a cylinder jacket; the opening angle goes towards 0 °.
  • the jacket shape of the cone 21 or 121 can thus be adapted very precisely to the characteristic curve of a blower which provides the air supply.
  • a precise central alignment of the gas-air mixing chamber 13 can be accomplished with the aid of an adjusting screw 34 which is inserted into the drum part 33.
  • Air blower and gas blower pressure and the throughput quantities can be coordinated very precisely, so that the gas-air mixture can be dimensioned for stoichiometric combustion.
  • the diaphragm wall 17 and the closing cone 21 can also be replaced without further ado in order to adapt the burner to other circumstances.

Abstract

1. A burner system for a gaseous fuel having a gas supply line and an air supply line (16; 8), both of which terminate in the region of a gas and air mixing chamber (13) enclosed by a wall (18), and in said burner system the gas supply and the air supply to the mixing chamber (13) being able to be simultaneously varied in a fixed ratio of gas to air via variable cross-section ducts or ports (28; 20) by means of a mechanism which can be adjusted along the longitudinal axis in accordance with the required burner output, viz. - the gas supply by means of a displaceable conical closure member (21; 121) which protrudes through an adjustment port (20) in the gas supply line (16), and - the air supply by means of a further displaceable member (25) cooperating with the conical closure member (21), characterized in that a) the adjustment port (20) is provided in a diaphragm wall (17) fitted in the gas supply line (16), b) the conical closure member (21; 121) is rigidly joined to a cylindrical box-type component (25) which encloses said closure member and constitutes a further member, its bottom side being open and receiving the stream of gas from the gas supply line (16) and its other side incorporating a gas discharge port (27), c) the wall (18) enclosing the gas and air mixing chamber (13) is cylindrical or quasi-cylindrical and in said wall are set the ducts (28) for the air supply, and d) the box-type component (25) slides inside the wall (18).

Description

Die Erfindung betrifft eine Brennereinrichtung für einen gasförmigen Brennstoff mit einer Gas-und einer Luftzufuhrleitung, die beide im Bereich einer von einer Wandung umschlossenen Gas-Luft-Mischkammer enden, bei welcher Brennereinrichtung die Gas- und die Luftzufuhr in die Mischkammer gleichzeitig über querschnittsveränderbare Kanäle bzw. Öffnungen mittels einer entlang der Längsachse verstellbaren Vorrichtung entsprechend der erforderlichen Brennerleistung in einem fest liegenden Gas-Luft-Verhältnis veränderbar sind, nämlich

  • - die Gaszufuhr mittels eines verschiebbaren Schließkegels, der durch eine Verstellöffnung der Gaszufuhrleitung ragt, und
  • - die Luftzufuhr mittels eines mit dem Schließkegel zusammenwirkenden weiteren verschiebbaren Organs.
The invention relates to a burner device for a gaseous fuel with a gas and an air supply line, both of which end in the area of a gas-air mixing chamber enclosed by a wall, in which burner device the gas and air supply into the mixing chamber simultaneously via cross-section-changeable channels or Openings can be changed in a fixed gas-air ratio by means of a device which can be adjusted along the longitudinal axis in accordance with the required burner output, namely
  • - The gas supply by means of a displaceable closing cone which projects through an adjustment opening of the gas supply line, and
  • - The air supply by means of another sliding member cooperating with the closing cone.

Aus der US-A-1 350 051 ist ein Gasbrenner bekannt, bei dem die Gas- und die Luftzufuhr in eine Gas-Luft-Mischkammer, an die sich der eigentliche Flammbereich sofort anschließt, veränderbar ist. Die Veränderbarkeit wird durch eine spindelartige Vorrichtung ermöglicht, die an ihrer Außenseite Schieber trägt, die die hintereinander geschalteten Gas- und Luftzufuhrleitungen, die jeweils peripher an einem Tubus enden, durch gleitepdes Abschieben öffnen oder schließen. Dabei wird gleichzeitig die Gas- und die Luftzufuhr in einem eingestellten Verhältnis geändert. Zusätzlich sind am Ende der eigentlichen Brennkammer noch Sekundär-Luftzuführungen vorgesehen.A gas burner is known from US Pat. No. 1,350,051, in which the gas and air supply can be changed into a gas-air mixing chamber, to which the actual flame area immediately adjoins. The variability is made possible by a spindle-like device which has slides on its outside, which open or close the gas and air supply lines, which are connected in series and each end peripherally on a tube, by sliding them off. The gas and air supply are changed at the same time in a set ratio. In addition, secondary air inlets are provided at the end of the actual combustion chamber.

Bei dem Betrieb von Brennern für gasförmige Brennstoffe stellt sich allgemein die Aufgabe, über den vorgesehenen Lastbereich möglichst eine stöchiometrische Verbrennung aufrecht zu erhalten, gleichzeitig für eine gute Durchmischung der ankommenden Brennstoff-und Luftmengen zu sorgen und einen gefahrlosen Betrieb zu gewährleisten. Bei dem bekannten Brenner ist nachteilig, daß die Gaszufuhr relativ schlecht zu dosieren ist, da der Querschnitt der peripher ankommenden Gaszufuhrleitung schon bei einer kleinen Verstellstrecke relativ stark verändert wird. Es ist dabei nicht ohne weiteres möglich, die Zufuhrkanäle beliebig groß zu machen, da das ankommende Gas im allgemeinen unter einem Überdruck von 3 - 10 bar steht und daher für eine bestimmte Leistung des Gasbrenners auch der Querschnitt der zu verstellenden Leitung nur ein relativ kleines Maximum haben darf. Bei dem bekannten Brenner ist daher eine mit einem relativ feinen Gewinde versehene Spindel zur Verstellung der Gas-Luft-Zufuhr vorgesehen. Das bekannte Konstruktionsprinzip ist nicht ohne weiteres übertragbar auf eine Brennereinrichtung, die mit einem Servo-Motor arbeitet, auch wenn in Figur 3 der bekannten Einrichtung ein anderer Steuermechanismus dargestellt ist, der möglicherweise ähnlich von einem Servo-Stellmotor übernommen werden kann.When operating burners for gaseous fuels, the general task is to maintain stoichiometric combustion as far as possible over the intended load range, at the same time to ensure thorough mixing of the incoming fuel and air quantities and to ensure safe operation. In the known burner, it is disadvantageous that the gas supply is relatively difficult to meter, since the cross section of the peripherally arriving gas supply line is changed relatively strongly even with a small adjustment distance. It is not readily possible to make the feed channels as large as desired, since the incoming gas is generally under an overpressure of 3 - 10 bar and therefore the cross-section of the line to be adjusted is only a relatively small maximum for a certain gas burner output may have. In the known burner, therefore, a spindle provided with a relatively fine thread is provided for adjusting the gas-air supply. The known design principle is not readily transferable to a burner device that works with a servo motor, even if another control mechanism is shown in FIG. 3 of the known device, which control mechanism can possibly be adopted in a similar manner.

Weiterhin ist eine Brennereinrichtung der eingangs genannten Art aus der DE-PS-1 551 803 bekannt. Die gemeinsame Steuerung der Ausströmquerschnitte von Luft und Brennstoff wird durch eine bewegliche Schwinge vorgenommen, welche zwei Steuerschlitten in axialer Richtung verschiebt. Der eine Steuerschlitten steuert durch Verschiebung einer in einer kegelförmig zulaufenden Luftzuleitung liegenden Scheibe den Ausströmquerschnitt der Luft und der andere Schlitten durch Verschieben eines Kegels in der Brennstoffzufuhrleitung den Gasaustrittsquerschnitt.Furthermore, a burner device of the type mentioned is known from DE-PS-1 551 803. The joint control of the outflow cross-sections of air and fuel is carried out by a movable rocker arm, which shifts two control slides in the axial direction. One control slide controls the outflow cross section of the air by displacing a disk lying in a conically tapering air supply line, and the other slide controls the gas outlet cross section by displacing a cone in the fuel supply line.

Nachteilig bei der vorgenannten Brennereinrichtung ist, daß die gemeinsame Verstellbarkeit über in Langlöchern der Schwinge geführte Zapfen, über Kurvenscheiben sowie über Hebelführungen erfolgt. Damit ist ein relativ komplizierter und verschleißanfälliger Mechanismus verwendet worden, der nach kurzer Betriebszeit ungenau arbeiten wird.A disadvantage of the aforementioned burner device is that the joint adjustability takes place via pins guided in elongated holes in the rocker, via cam disks and via lever guides. Thus, a relatively complicated and wear-prone mechanism has been used, which will operate imprecisely after a short period of operation.

Es stellt sich die Aufgabe, die Brennereinrichtung der eingangs genannten Art so zu verbessern, daß bei einer verschleißarmen Bauweise eine sehr genau einstellbare und auch für längere Standzeiten ihre Einstellwerte beibehaltende Gas- und Luftzufuhr erreichbar ist, auch wenn das Gas unter einem hohen Druck in die Brennereinrichtung einströmt.It is the task of improving the burner device of the type mentioned in such a way that, with a low-wear design, a gas and air supply which can be set very precisely and maintains its setting values even for longer service lives can be achieved, even when the gas is under high pressure in Burner device flows.

Die Lösung dieser Aufgabe gelingt bei einer Brennereinrichtung gemäß Erfindung, bei der

  • a) die Verstellöffnung in einer in die Gaszufuhrleitung eingebauten Blendenwand vorgesehen ist,
  • b) der Schließkegel starr mit einem ihn umgebenden zylindrischen Dosenteil als weiterem Organ verbunden ist, dessen Grundseite offen ist und den Gasstrom von der Gas-Zufuhrleitung aufnimmt und dessen andere Seite mit einer Gasaustrittsöffnung versehen ist,
  • c) bei der die Gas-Luft-Mischkammer umgebende Wandung zylindrisch oder quasizylindrisch ist und in ihr die Kanäle für die Luftzufuhr eingelassen sind und
  • d) bei der der Dosenteil innerhalb der Wandung gleitet.
This object is achieved in a burner device according to the invention in which
  • a) the adjustment opening is provided in a panel wall built into the gas supply line,
  • b) the closing cone is rigidly connected to a cylindrical can part surrounding it as a further organ, the base side of which is open and receives the gas flow from the gas supply line and the other side of which is provided with a gas outlet opening,
  • c) in which the wall surrounding the gas-air mixing chamber is cylindrical or quasi-cylindrical and in which the channels for the air supply are let in and
  • d) in which the can part slides within the wall.

Bei der Brennereinrichtung gemäß Erfindung ist eine zentrisch um die Verstellachse angeordnete Gaszufuhrleitung vorgesehen, in die vorzugsweise eine mit einer Öffnung versehene Blendenwand eingebaut ist, die mit Hilfe eines sehr flachwinkeligen Schließkegels verstellbar ist. Der Öffnungswinkel des Schließkegels liegt zwischen 1 und 15° (Altgrad), wobei die Kegelsteigung vorzugsweise konstant ist. Es ist jedoch auch denkbar, daß die Kegelwandung abweichend davon an der Spitze mit einem großen und/oder am Ende mit einem kleineren, gegebenenfalls bis zu Null herabgesetzten Öffnungswinkel ausgestattet ist. Der Kegel selbst kann relativ lang sein, so daß über eine relativ lange Verstellstrecke eine sehr feinfühlige und sich nur langsam verstellende Querschnittsveränderung möglich ist. Dieses Prinzip eignet sich daher besonders für die Anwendung von Servomotoren.In the burner device according to the invention, a gas supply line is provided which is arranged centrally around the adjustment axis and into which an orifice wall provided with an opening is preferably installed, which can be adjusted with the aid of a very flat-angle closing cone. The opening angle of the closing cone is between 1 and 15 ° (old degree), the cone pitch preferably being constant. However, it is also conceivable that the cone wall is provided with a large and / or at the end with a smaller, possibly reduced to zero opening angle at the tip. The cone itself can be relatively long, so that a very sensitive and only slowly changing cross-section change is possible over a relatively long adjustment distance. This The principle is therefore particularly suitable for the use of servomotors.

Aus der DE-A-3 113 511 ist eine Brennereinrichtung bekannt, bei der die Luftzuführung über eine Luftzufuhrleitung erfolgt, die über drallerzeugende Vorrichtungen eine Verbindung zwischen dem Ende der Luftzufuhrleitung und der Mischkammer herstellt. Die drallerzeugenden Vorrichtungen sind gleichzeitig als querschnittsveränderbare Kanäle gestaltet. Dieses Prinzip läßt sich mit Vorteil auch bei der vorliegenden Brennereinrichtung verwenden, wenn die querschnittsveränderbare Luftzufuhrleitung an der Peripherie der Mischkammer endet.A burner device is known from DE-A-3 113 511, in which the air is supplied via an air supply line, which creates a connection between the end of the air supply line and the mixing chamber via swirl-generating devices. The swirl-generating devices are simultaneously designed as cross-sectional channels. This principle can also be used with advantage in the present burner device if the cross-section-changeable air supply line ends at the periphery of the mixing chamber.

Gemäß einem Merkmal der Erfindung sind in die die Gas-Luft-Mischkammer umgebende Wandung querschnittsveränderbare, drallerzeugende Luftkanäle eingelassen, die die Verbindung zwischen dem Ende der Luftzufuhrleitung und der Gas-Luft-Mischkammer bilden. Es handelt sich hierbei um tangential in die Wandung eingeschnittene runde oder eckige Kanäle, wie sie im Prinzip aus der genannten DE-OS 3 113 511 bekannt sind.According to a feature of the invention, swirl-generating air ducts which are variable in cross-section and which form the connection between the end of the air supply line and the gas-air mixing chamber are embedded in the wall surrounding the gas-air mixing chamber. These are round or angular channels cut tangentially into the wall, as are known in principle from DE-OS 3 113 511 mentioned.

Weitere Merkmale der Unteransprüche sind in der nachfolgenden Beschreibung anhand der Zeichnung erläutert. Die Figuren der Zeichnung zeigen:

  • Figur 1a a einen Querschnitt durch eine Brennereinrichtung gemäß Erfindung in einer niedrigen Laststufe;
  • Figur 1b die Brennereinrichtung gemäß Figur 1 in Vollaststufe;
  • Figur 2 die verstellbare Blendeneinrichtung in vergrößerter Darstellung und
  • Figur 3 eine andere Gestaltung des Schließkegels.
Further features of the subclaims are explained in the following description with reference to the drawing. The figures in the drawing show:
  • Figure 1a a shows a cross section through a burner device according to the invention in a low load stage;
  • Figure 1b, the burner device according to Figure 1 at full load;
  • Figure 2 shows the adjustable diaphragm device in an enlarged view
  • Figure 3 shows another design of the closing cone.

Für die Brennereinrichtung ist als Brennstoff in erster Linie Erdgas oder ein verwandtes Gas vorgesehen. Es eignen sich jedoch auch reine Gase, wie Methan, Propan oder Butan sowie Stadtgas. Nicht auszuschließen ist auch die Verwendung eines Kohlenstaub-Luft- oder Öl-Luft-Gemisches.Natural gas or a related gas is primarily provided as the fuel for the burner device. However, pure gases such as methane, propane or butane and town gas are also suitable. The use of a coal dust-air or oil-air mixture cannot be ruled out.

Das nachfolgend beschriebene Ausführungsbeispiel bezieht sich allerdings auf einen Gasbrenner.However, the exemplary embodiment described below relates to a gas burner.

In den Figuren 1a und 1 ist im Querschnitt eine Brennereinrichtung gezeigt, wie sie beispielsweise bei der Verbrennung von Erdgas in einem Kessel für ein Mehrfamilienhaus in der Größenordnung 100.000 kcal/h verwendet werden kann. Die Brennereinrichtung, allgemein mit 1 bezeichnet, schließt sich hierbei an eine Kesselwand 2 an. Die Brennereinrichtung weist ein dreiteiliges Gehäuse 3 auf. Das Gehäuse 3 zerfällt in folgende Teile: ein sich auf die Kesselwand 2 im Inneren abstützendes Kopfteil 31, ein gestrecktes Tubusteil 32 und ein das Tubusteil 32 teilweise umgebendes, sich an der Rückseite der Kesselwand 2 unmittelbar anschließendes, im wesentlichen der Luftzufuhr dienendes Trommelteil 33. Die Teile 31 - 33 liegen im wesentlichen konzentrisch als Drehkörper zu dem gezeichneten Querschnitt und entlang einer Achse A.FIGS. 1a and 1 show in cross section a burner device of the type 100,000 kcal / h, for example when burning natural gas in a boiler for an apartment building. The burner device, generally designated 1, adjoins a boiler wall 2. The burner device has a three-part housing 3. The housing 3 is divided into the following parts: a head part 31 which is supported on the inside of the boiler wall 2, an elongated tube part 32 and a drum part 33 which partially surrounds the tube part 32 and which adjoins the rear of the boiler wall 2 and essentially serves to supply air. The parts 31-33 are essentially concentric as a rotating body to the cross section shown and along an axis A.

Das Trommelteil 33 umschließt eine runde, in die Kesselwand 2 eingearbeitete Öffnung 4 mit einer runden Wandung 5, die an ihrer Rückseite durch eine mit Mittelöffnung 6 versehene Rückwand 7 abschließt. Auf die Wandung 5 des Trommelteils 33 ist ein relativ groß dimensionierter, zylindrischer Stutzen 8 aufgesetzt. In die Öffnung 6 ist ferner der bereits erwähnte Tubusteil 32 fest eingesetzt. Der Tubusteil 32, der ebenfalls zylindrisch geformt ist, hat einen wesentlich geringeren Durchmesser als der Trommelteil 33. Der Tubusteil 32 ragt mit seinem Ende 9 aus dem Trommelteil 33 heraus und ist mit einer Rückwand 10, die mit einer Öffnung 11 versehen ist, verschlossen. Der Tubusteil 32 liegt ebenfalls konzentrisch zu der Achse A und endet kurz vor der Kesselwand- Öffnung 4 in einem Flansch 12 einer Gas-Luft-Mischkammer 13, die von einer Wandung 18 umschlossen ist. Die Gas-Luft-Mischkammer 13 endet an ihrer Stirnseite innerhalb des Kessels in einem Flansch 15, an den sich die Wandungen des Kopfteils 31 stützend anschließen und eine Verbindung zur Kesselwand 2 herstellen.The drum part 33 encloses a round opening 4, which is incorporated into the boiler wall 2, with a round wall 5, which closes at the rear by a rear wall 7 provided with a central opening 6. On the wall 5 of the drum part 33, a relatively large dimensioned cylindrical connector 8 is placed. The already mentioned tube part 32 is also firmly inserted into the opening 6. The tube part 32, which is also cylindrical in shape, has a substantially smaller diameter than the drum part 33. The end of the tube part 32 protrudes from the drum part 33 and is closed by a rear wall 10 which is provided with an opening 11. The tube part 32 is also concentric to the axis A and ends just before the boiler wall opening 4 in a flange 12 of a gas-air mixing chamber 13 which is enclosed by a wall 18. The gas-air mixing chamber 13 ends at its end face within the boiler in a flange 15, to which the walls of the head part 31 support and establish a connection to the boiler wall 2.

Der Tubusteil 32 ist als Gaszufuhrleitung 16 ausgebildet. Er ist dazu an seinem überstehenden Ende 9 mit einem Gaseinleitungsstutzen 16' versehen, durch den das Brenngas, z. B. Erdgas, einströmt und im Inneren des Tubusteiles 32 bis zu einer Blendenwand 17 ungehindert strömen kann. Dabei ist in den Tubusteil 32 ein verdrehbarer Blendenzylinder 51 mit einer kreisrunden Öffnung 51' eingebaut. Blendenzylinder 51 und Öffnung 51' können zur Ersteinstellung der Gaszufuhr gegeneinander nach Art einer Blendeneinstellung so weit verdreht werden, daß eine gewünschte Gasmenge durch den Stutzen 16' und die Öffnung 51' in den Tubusteil 32 eintreten kann.The tube part 32 is designed as a gas supply line 16. It is provided at its projecting end 9 with a gas inlet 16 'through which the fuel gas, for. B. natural gas flows in and can flow unhindered inside the tube part 32 up to a diaphragm wall 17. A rotatable diaphragm cylinder 51 with a circular opening 51 'is installed in the tube part 32. Diaphragm cylinder 51 and opening 51 'can be rotated against each other in the manner of a diaphragm setting so that a desired amount of gas can enter the tube part 32 through the connecting piece 16' and the opening 51 '.

Wie detaillierter aus der Figur 2 hervorgeht, ist die Blendenwand 17 mit einer Verstellöffnung 20 versehen, die genau konzentrisch zur Achse A liegt und die die einzige Öffnung innerhalb der Blendenwand 17 ist. Die Öffnung 20 ist in die Blendenwand 17 etwas konisch eingeschnitten, und zwar divergierend zur Öffnung des Tubusteiles 32 hin. Die Gaszufuhr durch den Tubusteil 32 kann mit Hilfe eines einen Teil einer schieberartigen Vorrichtung bildenden Schließkegels 21 verstellt werden. Der Schließkegel 21 ist entlang der Achse A innerhalb der Verstellöffnung 20 verschiebbar, wobei je nach Stellung des Schließkegels 21 die Verstellöffnung 20 von einem Maximumquerschnitt bis zu einem Minimum bzw. bis zu einem völligen Verschluß querschnittsveränderbar ist. Das für die Erfindung wesentliche Zusammenspiel von Verstellöffnung 20 und Schließkegel 21 wird ermöglicht durch eine verstellbare Gleitstange 22, die durch den Tubusteil 32 hindurchragt und deren Ende in einem in der Rückwand 10 des Tubusteiles 32 eingebauten Gleitlager 23 beweglich ist.As can be seen in greater detail from FIG. 2, the panel wall 17 is provided with an adjustment opening 20 which is exactly concentric to the axis A and which is the only opening within the panel wall 17. The opening 20 is cut somewhat conically into the diaphragm wall 17, specifically diverging towards the opening of the tube part 32. The gas supply through the tube part 32 can be adjusted with the aid of a closing cone 21 forming part of a slide-like device. The closing cone 21 can be displaced along the axis A within the adjustment opening 20, the cross-section being changeable depending on the position of the closing cone 21 from a maximum cross section to a minimum or to a complete closure. The interaction of the adjustment opening 20 and the closing cone 21 which is essential for the invention is made possible by an adjustable slide rod 22 which projects through the tube part 32 and the end of which is movable in a slide bearing 23 installed in the rear wall 10 of the tube part 32.

An ihrer in Richtung Kessel ragenden Spitze ist die Gleitstange 22 mit einer perforierten ersten Wandscheibe 24 verschraubt, die wiederum fest mit einem zylindrischen Dosenteil 25 verbunden ist. Die Grundseite des Dosenteils 25 ist offen und bildet damit einen Brennstoffdurchlaß 30. Den stirnseitigen Abschluß des zylindrischen Dosenteils 25 bildet eine weitere, zweite Wandscheibe 26, die mit einer zentrischen Gasaustrittsöffnung 27 versehen ist. Statt einer oder zusätzlich zur zentrischen Öffnung 27 können weitere Öffnungen in der Wandscheibe 26 vorgesehen sein.At its tip projecting in the direction of the boiler, the slide rod 22 is screwed to a perforated first wall disc 24, which in turn is firmly connected to a cylindrical can part 25. The base of the can part 25 is open and thus forms a fuel passage 30. The end of the cylindrical can part 25 is formed by a further, second wall disc 26, which is provided with a central gas outlet opening 27. Instead of one or in addition to the central opening 27, further openings can be provided in the wall disk 26.

Der Dosenteil 25 ist über die Gleitstange 22 mit dem Schließkegel 21 demnach starr verbunden. Der Dosenteil 25 kann sich gegenüber dem Tubusteil 32 axial bewegen.The box part 25 is therefore rigidly connected to the locking cone 21 via the slide rod 22. The can part 25 can move axially relative to the tube part 32.

Mit den bisher beschriebenen Teilen liegt eine Brennereinrichtung 1 für einen Gasbrenner vor, die mit einer Gaszufuhrleitung 16 versehen ist, die am Stutzen 16' beginnt, sich in den Tubusteil 32 fortsetzt, mit Hilfe der Anordnung aus Verstellöffnung 20 und Schließkegel 21 querschnittsveränderbar ist, und die in der Gasaustrittsöffnung 27 in der Gas-Luft-Mischkammer 13 endet. Die Luftzufuhr erfolgt durch die Luftzufuhrleitung 8, setzt sich in das Innere des Trommelteiles 33 fort und führt durch die von der Gas-Luft-Mischkammer 13 offen gelassene periphere Teilöffnung 4 in den Kopfteil 31. Von dort gelangt die Luft über tangential eingestellte, schlitzartige Luftkanäle 28 unter relativ hoher Geschwindigkeit in die Gas-Luft-Mischkammer 13 und vermischt sich dort mit dem Gas. Das Gas-Luft-Gemisch tritt dann aus einer Öffnung 29 der Kammer 13 aus und kann mit Hilfe einer (gestrichelt dargestellten) Zündvorrichtung 40 gezündet werden.With the parts described so far, there is a burner device 1 for a gas burner, which is provided with a gas supply line 16, which begins at the nozzle 16 ', continues into the tube part 32, can be changed in cross-section with the aid of the arrangement of the adjustment opening 20 and the closing cone 21, and which ends in the gas outlet opening 27 in the gas-air mixing chamber 13. The air supply takes place through the air supply line 8, continues into the interior of the drum part 33 and leads through the peripheral partial opening 4 left open by the gas-air mixing chamber 13 into the head part 31. From there, the air passes through tangentially set, slit-like air channels 28 into the gas-air mixing chamber 13 at a relatively high speed and mixes there with the gas. The gas-air mixture then emerges from an opening 29 of the chamber 13 and can be ignited with the aid of an ignition device 40 (shown in broken lines).

Der die Gleitstange 22 umschließende Schließkegel 21 ist beispielsweise als Drehteil mit einem Kegelöffnungswinkel zwischen 1 und 15°, vorzugsweise zwischen 3,5 und 5° hergestellt. Über eine Flanschverbindung 41 ist der Kegel 21 abnehmbar verbunden mit einem Mantelrohr 42, welches sich durch das Gleitlager 23 fortsetzt. Der durch die Öffnung 11 ragende Teil der Gleitstange 22 mit dem Mantelrohr 42 wird mit Hilfe eines Servomotors 44 hin- und herbewegt. Wie aus Figur 2 ersichtlich ist, ist eine dazu auf das Mantelrohr 42 aufgesetzte Muffe 45 innerhalb einer Gleithülse 45' verschiebbar angeordnet. Ein Abschaltkontakt 46 drückt auf einen Schalter 46' und sorgt für eine Notabschaltung, falls eine bestimmte Minimalstellung des Schließkegels 21 überschritten ist. Diese Maßnahme verhindert, daß durch den Schließkegel die Verstellöffnung 20 beschädigt wird. Weiterhin ist eine Pufferfeder 47 in eine Nut der Gleithülse 45' derart eingebaut, daß bei Verstellen der Gleitstange 22 gegen die Minimumstellung an der Feder 47 noch eine Abpufferung erfolgt. Damit ist die Gleitstange 22, die durch den Servomotor 44 angetrieben wird, im Bereich ihrer Endstellung abgefedert und abgesichert.The closing cone 21 surrounding the slide rod 22 is produced, for example, as a turned part with a cone opening angle between 1 and 15 °, preferably between 3.5 and 5 °. Via a flange connection 41, the cone 21 is removably connected to a casing tube 42, which continues through the plain bearing 23. The part of the slide rod 22 with the casing tube 42 protruding through the opening 11 is moved back and forth with the aid of a servo motor 44. As can be seen from FIG. 2, a sleeve 45 which is placed on the casing tube 42 for this purpose is arranged displaceably within a sliding sleeve 45 '. A shutdown contact 46 presses a switch 46 'and ensures an emergency shutdown if a certain minimum position of the closing cone 21 is exceeded. This measure prevents the adjustment opening 20 from being damaged by the closing cone. Furthermore, a buffer spring 47 is installed in a groove of the sliding sleeve 45 'in such a way that buffering takes place when the slide rod 22 is adjusted against the minimum position on the spring 47. The slide rod 22, which is driven by the servo motor 44, is thus cushioned and secured in the region of its end position.

Weiterhin sorgt ein Luftdruckwächter 50 für eine Überwachung des Luftdruckes innerhalb des Trommelteiles 33, womit ebenfalls die Betriebssicherheit gewährleistet wird, denn bei Abfall des Druckes wird auch die Gaszufuhr abgeschaltet.Furthermore, an air pressure monitor 50 monitors the air pressure within the drum part 33, which also ensures operational safety, because if the pressure drops, the gas supply is also switched off.

Durch die Betätigung der Gleitstange 22 und des Schließkegels 21 wird, wie beschrieben, gleichzeitig der Dosenteil 25 vor den Luftkanälen 28 hin und her bewegt und sorgt damit für eine Veränderung der Luftzufuhr. Der Dosenteil 25 bildet demnach das mit dem Schließkegel 21 verbundene weitere Organ, mit dem die Luftzufuhr veränderbar ist.By actuating the slide rod 22 and the closing cone 21, as described, the can part 25 is simultaneously moved back and forth in front of the air channels 28 and thus ensures a change in the air supply. The can part 25 therefore forms the further member connected to the closing cone 21, with which the air supply can be changed.

Vorzugsweise ist der Schließkegel 21 als Spitze der im Inneren des Tubusteiles 32 beweglich angeordneten Gleitstange 22 gestaltet. Es ist jedoch auch denkbar, daß der Schließkegel 21 isoliert über einen gesonderten Antrieb bewegt wird.The closing cone 21 is preferably designed as the tip of the slide rod 22 which is movably arranged in the interior of the tube part 32. However, it is also conceivable that the closing cone 21 is moved in isolation via a separate drive.

Im vorliegenden Falle ist die Spitze des Schließkegels 21 mit zwei hintereinandergeschalteten Wandscheiben 24 und 26 verbunden, von denen die eine eine Kreisringform und die andere eine Scheibenform aufweist, bei der eine zentrische, im Bereich der Kegelspitze liegende Austrittsöffnung 27 vorhanden ist. Die beiden Wandscheiben 24 und 26 sind zusammen mit dem Kegel 21 beweglich. Dagegen ist starr innerhalb des nichtbeweglichen Tubusteiles 32 die Blendenwand 17 angeordnet, die von dem Schließkegel 21 durchdrungen wird.In the present case, the tip of the closing cone 21 is connected to two series-connected wall disks 24 and 26, one of which has a circular ring shape and the other a disk shape in which there is a central outlet opening 27 in the area of the cone tip. The two wall disks 24 and 26 are movable together with the cone 21. In contrast, the diaphragm wall 17, which is penetrated by the closing cone 21, is rigidly arranged within the non-movable tube part 32.

Die äußere Mantelform und der Öffnungswinkel des Kegels 21 werden im wesentlichen an die Bedürfnisse der Verstellgeschwindigkeit und Verstellstrecke angepaßt. Eine schlanke Kegelform ermöglicht es, daß auch bei höherem Gasdruck eine sehr exakte Bemessung der Gaszufuhr ermöglicht wird.The outer shell shape and the opening angle of the cone 21 are essentially adapted to the needs of the adjustment speed and adjustment distance. A slim cone shape enables a very exact measurement of the gas supply even at higher gas pressure.

Anstelle eines Kegelmantels mit konstantem Kegelwinkel, der im allgemeinen zwischen 1 und 15° Öffnungswinkel besitzt, können auch trompetenartig geformte Kegelmäntel oder solche mit Stufenverstellung verwendet werden.Instead of a cone shell with a constant cone angle, which generally has between 1 and 15 ° opening angle, trumpet-shaped cone shells or those with step adjustment can also be used.

Figur 3 zeigt einen Schließkegel 121, der eine gegenüber der vorbeschriebenen Ausführungsform abgewandelte Form hat. An seiner Spitze 36 ist er stärker konvergierend; sein Öffnungswinkel beträgt dort etwa zwischen 10 und 30°. An seinem Ende 37 ist er dagegen abgeflacht, d. h. er nimmt die Form eines Zylindermäntels an; der Öffnungswinkel geht gegen 0°. Die Mantelform des Kegels 21 bzw. 121 kann somit an die Kennlinie eines für die Luftzufuhr sorgenden Gebläses sehr exakt angepaßt werden.FIG. 3 shows a closing cone 121 which has a shape which is modified compared to the above-described embodiment. At its tip 36 it is more converging; there its opening angle is approximately between 10 and 30 °. On the other hand, it is flattened at its end 37, i. H. it takes the form of a cylinder jacket; the opening angle goes towards 0 °. The jacket shape of the cone 21 or 121 can thus be adapted very precisely to the characteristic curve of a blower which provides the air supply.

Eine genaue zentrische Ausrichtung der Gas-Luft-Mischkammer 13 kann mit Hilfe einer Verstellschraube 34 bewerkstelligt werden, die in den Trommelteil 33 eingesetzt ist.A precise central alignment of the gas-air mixing chamber 13 can be accomplished with the aid of an adjusting screw 34 which is inserted into the drum part 33.

Luftgebläse- und Gasgebläsedruck und die Durchsatzmengen können sehr genau aufeinander abgestimmt werden, so daß das Gas-Luft-Gemisch auf eine stöchiometrische Verbrennung hin bemessen werden kann. Die Blendenwand 17 und der Schließkegel 21 können auch ohne weiteres ausgewechselt werden, um den Brenner an andere Gegebenheiten anzupassen.Air blower and gas blower pressure and the throughput quantities can be coordinated very precisely, so that the gas-air mixture can be dimensioned for stoichiometric combustion. The diaphragm wall 17 and the closing cone 21 can also be replaced without further ado in order to adapt the burner to other circumstances.

Insgesamt ergibt sich eine für gasförmige Brennstoffe geeignete Brennereinrichtung, mit der innerhalb eines großen Lastbereiches die Brennstoff- und Luftzufuhr gesteuert werden kann.Overall, this results in a burner device suitable for gaseous fuels, with which the fuel and air supply can be controlled within a large load range.

Claims (5)

1. A burner system for a gaseous fuel having a gas supply line and an air supply line (16; 8), both of which terminate in the region of a gas and air mixing chamber (13) enclosed by a wall (18), and in said burner system the gas supply and the air supply to the mixing chamber (13) being able to be simultaneously varied in a fixed ratio of gas to air via variable cross-section ducts or ports (28; 20) by means of a mechanism which can be adjusted along the longitudinal axis in accordance with the required burner output, viz.
- the gas supply by means of a displaceable conical closure member (21; 121) which protrudes through an adjustment port (20) in the gas supply line (16), and
- the air supply by means of a further displaceable member (25) cooperating with the conical closure member (21),
characterized in that
a) the adjustment port (20) is provided in a diaphragm wall (17) fitted in the gas supply line (16),
b) the conical closure member (21; 121) is rigidly joined to a cylindrical box-type component (25) which encloses said closure member and constitutes a further member, its bottom side being open and receiving the stream of gas from the gas supply line (16) and its other side incorporating a gas discharge port (27),
c) the wall (18) enclosing the gas and air mixing chamber (13) is cylindrical or quasi-cylindrical and in said wall are set the ducts (28) for the air supply, and
d) the box-type component (25) slides inside the wall (18).
2. A burner system according to claim 1, characterised in that the apex angle of the conical closure member (21), preferably constant along the length of the envelope, is between 1 and 15°.
3. A burner system according to claim 1, characterised in that the envelope of the conical closure member (121) has a constant apex angle in its middle region, deviates therefrom at its tip (36) by having a larger and/or at its end (37) a smaller apex angle, reduced as far as zero if appropriate.
4. A burner system according to claim 1, characterized in that the conical closure member (21) is joined at its tip to the box-type component (25) via at least one perforated wall disc (24).
5. A burner system according to claim 4, characterised in that two wall discs (24, 26), connected in series, are arranged on the tip of the conical closure member (21), of which the wall disc (24) sealing the box-type component (25) is in the shape of an annular ring.
EP85101655A 1984-02-29 1985-02-15 Adjustable burner equipment for a gaseous fuel Expired EP0158045B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85101655T ATE43701T1 (en) 1984-02-29 1985-02-15 POWER VARIABLE BURNER DEVICE FOR A GASEOUS FUEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843407343 DE3407343A1 (en) 1984-02-29 1984-02-29 POWER-CHANGEABLE BURNER DEVICE FOR A GAS BURNER
DE3407343 1984-02-29

Publications (3)

Publication Number Publication Date
EP0158045A2 EP0158045A2 (en) 1985-10-16
EP0158045A3 EP0158045A3 (en) 1986-12-30
EP0158045B1 true EP0158045B1 (en) 1989-05-31

Family

ID=6229147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101655A Expired EP0158045B1 (en) 1984-02-29 1985-02-15 Adjustable burner equipment for a gaseous fuel

Country Status (3)

Country Link
EP (1) EP0158045B1 (en)
AT (1) ATE43701T1 (en)
DE (2) DE3407343A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3721153A1 (en) * 1987-06-26 1989-01-05 Manfred Geitner Method for the thermostatically controlled matching of the heat output of a thermal radiator, as well as device for carrying out the method
NL8702191A (en) * 1987-09-15 1989-04-03 Flameco Eclipse Bv GAS BURNER.
DE19922509A1 (en) * 1999-05-15 2000-11-23 Messer Griesheim Gmbh Device for spraying fuel, preferably natural gas, and/or oxygen into an arc furnace has feed pipes for the natural gas and oxygen with various chambers and supports

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE482010C (en) * 1929-09-04 Richard Zeh Process for the combustion of compressed gas with premixing of the two combustion agents and burners in addition
US1350051A (en) * 1917-04-07 1920-08-17 Wilson Lloyd Gas-burner
DE1551803A1 (en) * 1967-03-30 1970-04-02 Koerting Ag Burners for gaseous fuels
DE2233627B2 (en) * 1972-07-08 1976-05-13 Körting Öl- und Gasfeuerung GmbH, 3000 Hannover GAS BURNER
DE3113511C2 (en) * 1981-04-03 1986-07-10 Holec Gas Generators B.V., Nijmegen Burner device for a gaseous fuel
DE3306892A1 (en) * 1983-02-26 1984-08-30 Jörg 8775 Partenstein Köster Gas burner for the heating of industrial furnaces

Also Published As

Publication number Publication date
DE3407343A1 (en) 1985-11-21
DE3407343C2 (en) 1987-01-15
EP0158045A2 (en) 1985-10-16
EP0158045A3 (en) 1986-12-30
DE3570738D1 (en) 1989-07-06
ATE43701T1 (en) 1989-06-15

Similar Documents

Publication Publication Date Title
EP0636836B1 (en) Burner for burning pulverulent fuel
DE3518080C2 (en)
DE2729321C2 (en) Process for the combustion of liquid fuel and burner device for carrying out the process
DE2659089C3 (en) Burners, in particular for liquid fuels
EP0062316B1 (en) Burner arrangement, especially for a gas burner
EP0158045B1 (en) Adjustable burner equipment for a gaseous fuel
DE3930569A1 (en) Oil or gas burner mixing system - has coaxial air guide tube round nozzle stem of length twice hydraulic dia
DE2511500C2 (en) Burners for burning liquid fuel
EP0702194B1 (en) Combined gas/air-valve for burner
DE2759004C2 (en) Oil burner for low heating output
EP0508164B1 (en) Device for controlling the flow rate and/or the mixing rate of a gaseous fuel-air mixture
DE4008692A1 (en) Forced draught oil burner mixer - has tapering tube bent radially inwards at forward end
DE19629966A1 (en) Method and appliance for controlling primary air fraction of atmospheric gas burner
DE102007060090A1 (en) Burner for rotary kiln in cement industry, has tangential openings in connection with fuel channel in one displaced position, and axial circular opening enabled concentrically to fuel channel in another displaced position
DE549668C (en) Burners for liquid, gas or dust fuel
DE2402997C3 (en) Gaseous fuel burners
DE19519696A1 (en) Mixer for burner in small firing system
DE2313126C3 (en) Gaseous fuel burners
CH575573A5 (en) Oil burner with high burning efficiency - has central burner nozzle within flame tube provided with deflector disc
DE2447151A1 (en) Burner for combustion of liquid fuels - with fuel-composition expansion and simultaneous admission of additional air
AT123479B (en) Burners for furnaces.
DE2313127C3 (en) Gaseous fuel burners
DE2403486A1 (en) Head for fuel oil burner - has a throttle disc to prevent entry of additional air
DE3512702A1 (en) Burner for liquid and gaseous fuels on a heating boiler
DE2160045C3 (en) Blower gas 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

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

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

Owner name: SMIT OVENS B.V.

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19870626

17Q First examination report despatched

Effective date: 19880210

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 GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 43701

Country of ref document: AT

Date of ref document: 19890615

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3570738

Country of ref document: DE

Date of ref document: 19890706

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: NOVELTY SERVICE ING. DI IORIO G.

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
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930125

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930128

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930201

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930210

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19930212

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930224

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930228

Year of fee payment: 9

Ref country code: AT

Payment date: 19930228

Year of fee payment: 9

EPTA Lu: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930518

Year of fee payment: 9

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

Ref country code: LU

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

Effective date: 19940215

Ref country code: GB

Effective date: 19940215

Ref country code: AT

Effective date: 19940215

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

Ref country code: SE

Effective date: 19940216

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

Ref country code: LI

Effective date: 19940228

Ref country code: CH

Effective date: 19940228

Ref country code: BE

Effective date: 19940228

BERE Be: lapsed

Owner name: SMIT OVENS B.V.

Effective date: 19940228

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

Ref country code: NL

Effective date: 19940901

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940215

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19941031

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: DE

Effective date: 19941101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 85101655.0

Effective date: 19940910