EP1821036A2 - Burners - Google Patents

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Publication number
EP1821036A2
EP1821036A2 EP07100966A EP07100966A EP1821036A2 EP 1821036 A2 EP1821036 A2 EP 1821036A2 EP 07100966 A EP07100966 A EP 07100966A EP 07100966 A EP07100966 A EP 07100966A EP 1821036 A2 EP1821036 A2 EP 1821036A2
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EP
European Patent Office
Prior art keywords
supply
medium
fuel
combustion
channels
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Granted
Application number
EP07100966A
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German (de)
French (fr)
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EP1821036A3 (en
EP1821036B1 (en
Inventor
Martin Adendorff
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Messer Group GmbH
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Messer Group GmbH
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Priority to SI200731825A priority Critical patent/SI1821036T1/en
Priority to PL07100966T priority patent/PL1821036T3/en
Publication of EP1821036A2 publication Critical patent/EP1821036A2/en
Publication of EP1821036A3 publication Critical patent/EP1821036A3/en
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Publication of EP1821036B1 publication Critical patent/EP1821036B1/en
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    • 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
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • 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
    • F23D14/84—Flame spreading or otherwise shaping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/22—Fuel valves cooperating with magnets

Definitions

  • the invention relates to a device for injecting combustion media, such as fuel or oxidant, in a metallurgical treatment room, with one or more supply channels for a first combustion medium and a plurality of supply channels for a second fuel medium, which open in an orifice region of the device.
  • combustion media such as fuel or oxidant
  • Burners or lances for injecting fuel and / or oxidant into a metallurgical treatment space are known.
  • a lance for injecting fuel and / or oxygen into a melting furnace which has a central supply line for fuel and a coaxially arranged supply line for oxygen.
  • a multiplicity of obliquely extending feed channels leads from the oxygen feed line into the fuel feed line. Through these supply channels at least a portion of the oxygen is introduced into the mouth portion of the fuel supply line and mixed with the fuel. The mixture is introduced into the furnace and forms a flame there.
  • the object of the invention is therefore to provide a device for injecting fuel and oxidant into a metallurgical treatment space in which the treatment chamber is more uniformly exposed to the flame.
  • the feed channels for the second combustion medium are charged with the fuel medium via the supply lines separated from each other by flow.
  • the flow rate passed through each of the supply lines can also be individually adjusted during operation of the device.
  • the respectively suitable setting of the flow rates can be determined empirically, for example.
  • the supply lines are in flow communication with a supply unit for the second combustion medium.
  • the supply unit can be, for example, a tank or a pipeline from which the supply ducts are supplied centrally with the second combustion medium.
  • the supply lines are preferably equipped with valves for limiting the flow, which are in data communication with a control unit, by means of which the flow rates through the individual supply lines can be controlled.
  • valves are motor-operated valves or slides, in particular ball valves, or solenoid valves.
  • valves are each provided with a bypass in order to ensure a minimum flow through the supply line.
  • a particularly advantageous embodiment of the invention provides a geometry of the device according to the invention in the form of an axial feed channel for the first fuel medium, which is coaxially enclosed by a feed for the second fuel medium, which divided at least on their rear portion seen in the mouth region in flow-separated feed channels is.
  • the feed for the second combustion medium is preferably subdivided into two feed channels which are separated from one another by oppositely disposed flow separators. This allows a two-dimensional change in position of the flame along a plane in the treatment room.
  • this embodiment allows in particular a pivoting of a flame generated in the combustion chamber of the combustion media in the treatment room.
  • a further embodiment of the invention provides that the feed for the second combustion medium is subdivided into at least three feed channels, which are separated from one another by flow separators arranged at preferably equal angular intervals.
  • this embodiment allows a three-dimensional position change, in particular a rotation of a flame generated in the combustion chamber of the combustion medium in the treatment room. If more than three supply channels are provided, the flame geometry can be more selectively influenced by a variation of the different flow rates.
  • the object of the invention is also achieved by a method for operating the device described above, in which a first combustion medium is introduced through a supply channel for the first fuel and a second fuel medium through supply channels for the second fuel medium in the treatment chamber, in which the first fuel reacts with the second combustion medium to form a flame, wherein the geometry of the flame is changed during the combustion process by a variation of the flow rate through the supply channels.
  • the flame is thereby pivoted or rotated by a periodic sequence of changing flow rates in the supply lines. This achieves a uniform admission of the treatment chamber with the flame and thus the production of a uniform heat distribution in the treatment room.
  • the device 1 is a fuel-oxygen burner.
  • the device 1 comprises a central feedthrough 3 for a starting gas, which also serves as an observation channel for a UV monitoring unit 4 connected to the feedthrough 3.
  • a fuel supply 5 is arranged, which serves to introduce a fuel into a metallurgical treatment chamber 6.
  • Coaxial around the fuel supply 5 around an oxygen supply 8 is arranged.
  • the oxygen supply 8 is subdivided by means of partition walls 9, 10 which are arranged over virtually the entire longitudinal extension of the oxygen supply 8 into two oxygen supply channels 12, 13 which are separated from one another by fluid flow and into which separate supply lines 14, 15 each open.
  • the supply lines 14, 15 are connected via a three-way valve 17 to an oxygen main line 18 via which oxygen is supplied from a storage container (not shown here), for example an oxygen tank.
  • a storage container not shown here
  • the device 1 can be equipped with cooling in a known manner and therefore not shown here.
  • liquid or gaseous fuel in the exemplary embodiment natural gas, via a fuel port 20 in the fuel supply 5 and from there in an amount of 20 to 80 m 3 / h and at a speed in the range of 15 - 50 m / s introduced into the treatment room 6.
  • Oxygen is likewise introduced into the treatment chamber 6 via at least one of the oxygen supply ducts 12, 13, wherein the flow through the supply ducts 14, 15 and thus through the oxygen supply lines 12, 13 can each be precisely adjusted by a corresponding setting on the three-way valve 17 , Oxygen and fuel mix within the treatment chamber 6 in the apron of the burner mouth 21 via a Zündgasan gleich 22 a pilot gas is introduced through the passage 3 in the treatment chamber 6, which for the ignition of the fuel-oxygen mixture and the subsequent formation of a flame before Burner mouth 21 provides.
  • the flame forming in front of the mouth 21 of the burner can be pivoted within the treatment space 6 along a vertical plane.
  • the flow ratio for the amounts of oxygen passed through the lines 14,15 and the oxygen channels 12,13 is changed.
  • the Alternating supply of the oxygen channels 12,13 with a large or small amount of oxygen the flame can also be moved periodically up and down.
  • the device 1 thus provides a cost-effective way to continuously change the position of the flame within the treatment chamber 6 by pivoting, without the need for this a complex structural change in the wall of the treatment chamber 6 or a pivotal mounting of the burner.
  • the device 30 differs from the device 1 only in the structure of the oxygen supply 32. While the oxygen supply 8 is divided in the device 1 into two flow channels 13,14, the oxygen supply 32 by means of two flow separators in the form of at least substantially gas-tight partitions 33rd , 34,35 divided into three oxygen supply channels 36,37,38.
  • the oxygen supply channels 36, 37, 38 are each in fluid communication with supply lines 39, 40, 41.
  • the supply lines 39, 40, 41 are connected via a distributor 42 to an oxygen main line 43.
  • each flow-controlling valves for example, solenoid valves 45,46,47 are provided in these, which can be controlled by a central control unit 49 according to a predetermined program.
  • the solenoid valves 45, 46, 47 are each provided with a bypass 51, 52, 53 in order to ensure a minimum flow throughflow in each of the supply lines 39, 40, 41 even in the case of a closed solenoid valve.
  • fuel for example natural gas
  • oxygen is introduced from the main oxygen line 43 via the supply lines 39, 40, 41 into the treatment chamber 6 via at least one of the oxygen supply channels 36, 37, 38.
  • a flame forms in the treatment chamber 6 in front of the burner mouth 21.
  • the oxygen streams guided through the oxygen channels 36, 37, 38 are set by the control unit 49 by driving the solenoid valves 45, 46, 47.
  • An asymmetry in the guided through the oxygen supply channels 36,37,38 oxygen flows leads to a corresponding asymmetry of the flame in the treatment chamber 6.
  • a rotation of the flame in the treatment chamber 6 succeeds.
  • the flame propagation and the rotational speed can be freely set in a wide range and individually adapted to the respective treatment room.
  • the devices 1,30 can be installed without extensive structural measures in existing treatment rooms. They are inexpensive in construction and easy to use.

Abstract

The device has supply channels (37,38) for the other combustion medium are connected with supply lines (39,40,41) that are fluidically separated from each other, in which devices are provided for separate regulation of the flow are intended. The supply lines are equipped with armature for limiting the current flow. An independent claim is also included for a method for the operation of a device, which involves a combustion medium fed by a supply channel, which is for the combustion medium.

Description

Die Erfindung betrifft eine Vorrichtung zum Eindüsen von Brennmedien, wie Brennstoff oder Oxidationsmittel, in einen metallurgischen Behandlungsraum, mit einem oder mehreren Zuführungskanälen für ein erstes Brennmedium und mehreren Zuführungskanälen für ein zweites Brennmedium, die in einem Mündungsbereich der Vorrichtung ausmünden.The invention relates to a device for injecting combustion media, such as fuel or oxidant, in a metallurgical treatment room, with one or more supply channels for a first combustion medium and a plurality of supply channels for a second fuel medium, which open in an orifice region of the device.

Bekannt sind Brenner oder Lanzen zum Eindüsen von Brennstoff und/oder Oxidationsmittel in einen metallurgischen Behandlungsraum.Burners or lances for injecting fuel and / or oxidant into a metallurgical treatment space are known.

Aus der EP 1 204 769 B1 ist beispielsweise eine Lanze zum Eindüsen von Brennstoff und/oder Sauerstoff in einen Schmelzofen bekannt, die eine zentrale Zuleitung für Brennstoff sowie eine koaxial hierzu angeordnete Zuleitung für Sauerstoff aufweist. Im Bereich der Mündungsöffnung der Lanze führt eine Vielzahl von schräg verlaufenden Zuführungskanälen von der Sauerstoffzuleitung in die Brennstoffzuleitung. Durch diese Zuführungskanäle wird zumindest ein Teil des Sauerstoffs in den Mündungsabschnitt der Brennstoffzuleitung eingeleitet und mit dem Brennstoff durchmischt. Das Gemisch wird in den Schmelzofen eingetragen und bildet dort eine Flamme aus.From the EP 1 204 769 B1 For example, a lance for injecting fuel and / or oxygen into a melting furnace is known, which has a central supply line for fuel and a coaxially arranged supply line for oxygen. In the area of the mouth opening of the lance, a multiplicity of obliquely extending feed channels leads from the oxygen feed line into the fuel feed line. Through these supply channels at least a portion of the oxygen is introduced into the mouth portion of the fuel supply line and mixed with the fuel. The mixture is introduced into the furnace and forms a flame there.

Derartige Brenner bzw. Lanzen haben sich in der Praxis bewährt. Nachteilig ist jedoch, dass der metallurgische Behandlungsraum nur sehr ungleichmäßig von der Flamme beaufschlagt wird und es damit zu einer sehr ungleichmäßigen Wärmeverteilung kommt. Insbesondere bei Behandlungsräumen mit ungewöhnlicher Geometrie führt dies zu einem ungünstigen Ergebnis der Wärmebehandlung.Such burners or lances have proven themselves in practice. The disadvantage, however, is that the metallurgical treatment chamber is acted upon very unevenly by the flame and thus it comes to a very uneven heat distribution. Especially in treatment rooms with unusual geometry, this leads to an unfavorable result of the heat treatment.

Um die Flammengeometrie zu beeinflussen wurde beispielsweise in der DE 101 56 376 vorgeschlagen, die Oxidationsmittelzufuhr eines Brenners mit einer Dralldüse auszustatten. Die Möglichkeiten, hierdurch den Behandlungsraum gleichmäßig mit der Flamme zu beaufschlagen, sind jedoch begrenzt.For example, in order to influence the flame geometry DE 101 56 376 proposed to equip the oxidant supply of a burner with a swirl nozzle. However, the possibilities of applying the flame evenly to the treatment room are limited.

Aufgabe der Erfindung ist daher, eine Vorrichtung zum Eindüsen von Brennstoff und Oxidationsmittel in einen metallurgischen Behandlungsraum zu schaffen, bei der der Behandlungsraum gleichmäßiger mit der Flamme beaufschlagt wird.The object of the invention is therefore to provide a device for injecting fuel and oxidant into a metallurgical treatment space in which the treatment chamber is more uniformly exposed to the flame.

Gelöst ist diese Aufgabe bei einer Vorrichtung der eingangs genannten Art dadurch, dass die Zuführungskanäle für das zweite Brennmedium jeweils mit strömungstechnisch voneinander getrennten Versorgungsleitungen verbunden sind, in denen Einrichtungen zur separaten Regelung des Strömungsdurchflusses vorgesehen sind.This object is achieved with a device of the type mentioned above in that the supply channels for the second fuel medium are each connected to fluidically separate supply lines, in which means for separate control of the flow rate are provided.

Die Zuführungskanäle für das zweite Brennmedium werden über die voneinander strömungstechnisch getrennten Versorgungsleitungen mit dem Brennmedium beschickt. Durch die Einrichtungen zur Regelung des Strömungsdurchflusses kann der durch jede der Versorgungsleitungen geführte Mengenstrom auch während des Betriebs der Vorrichtung individuell eingestellt werden. Insbesondere gelingt es auf dieses Weise durch eine geeignete Einstellung der Strömungsdurchflüsse durch die einzelnen Zuleitungen, die Geometrie und Richtung der sich im Behandlungsraum ausbildenden Flamme in nahezu beliebiger Weise zu beeinflussen. Die jeweils geeignete Einstellung der Strömungsdurchflüsse kann dabei beispielsweise empirisch ermittelt werden.The feed channels for the second combustion medium are charged with the fuel medium via the supply lines separated from each other by flow. Through the means for controlling the flow rate, the flow rate passed through each of the supply lines can also be individually adjusted during operation of the device. In particular, it is possible in this way by a suitable adjustment of the flow rates through the individual leads to influence the geometry and direction of forming in the treatment chamber flame in almost any way. The respectively suitable setting of the flow rates can be determined empirically, for example.

Vorzugsweise stehen die Versorgungsleitungen dabei mit einer Versorgungseinheit für das zweite Brennmedium in Strömungsverbindung. Bei der Versorgungseinheit kann es sich beispielsweise um einen Tank oder eine Rohrleitung handeln, aus dem/der die Zuleitungskanäle zentral mit dem zweiten Brennmedium versorgt werden.Preferably, the supply lines are in flow communication with a supply unit for the second combustion medium. The supply unit can be, for example, a tank or a pipeline from which the supply ducts are supplied centrally with the second combustion medium.

Um eine besonders effiziente Beeinflussung der Flammengeometrie zu bewerkstelligen, sind die Versorgungsleitungen bevorzugt mit Armaturen zur Begrenzung des Durchflusses ausgerüstet, die mit einer Steuereinheit in Datenverbindung stehen, mittels der die Strömungsdurchflüsse durch die einzelnen Versorgungsleitungen hindurch steuerbar sind. Bevorzugte Armaturen sind dabei motorbetriebene Ventile oder Schieber, insbesondere Kugelhähne, oder Magnetventile.In order to achieve a particularly efficient influencing of the flame geometry, the supply lines are preferably equipped with valves for limiting the flow, which are in data communication with a control unit, by means of which the flow rates through the individual supply lines can be controlled. Preferred valves are motor-operated valves or slides, in particular ball valves, or solenoid valves.

Zweckmäßigerweise sind die Armaturen jeweils mit einem Bypass versehen, um einen minimalen Strömungsdurchfluss durch die Versorgungsleitung zu gewährleisten.Conveniently, the valves are each provided with a bypass in order to ensure a minimum flow through the supply line.

Eine besonders vorteilhafte Ausgestaltung der Erfindung sieht eine Geometrie der erfindungsgemäßen Vorrichtung in Form eines axialen Zuführungskanals für das erste Brennmedium vor, die koaxial von einer Zuführung für das zweite Brennmedium umschlossen ist, die zumindest auf ihrem vom Mündungsbereich gesehen hinteren Abschnitt in strömungstechnisch voneinander separierten Zuführungskanäle unterteilt ist.A particularly advantageous embodiment of the invention provides a geometry of the device according to the invention in the form of an axial feed channel for the first fuel medium, which is coaxially enclosed by a feed for the second fuel medium, which divided at least on their rear portion seen in the mouth region in flow-separated feed channels is.

Bevorzugt ist die Zuführung für das zweite Brennmedium in zwei, durch gegenüberliegend angeordnete Strömungstrenner voneinander getrennte Zuführungskanäle unterteilt. Dies ermöglicht eine zweidimensionale Positionsänderung der Flamme längs einer Ebene im Behandlungsraum. Durch eine alternierende Ansteuerung der Armaturen der den jeweiligen Zuführungskanälen zugeordneten Versorgungsleitungen ermöglicht diese Ausgestaltung insbesondere ein Verschwenken einer bei der Verbrennung der Brennmedien im Behandlungsraum erzeugten Flamme.The feed for the second combustion medium is preferably subdivided into two feed channels which are separated from one another by oppositely disposed flow separators. This allows a two-dimensional change in position of the flame along a plane in the treatment room. By an alternating control of the valves of the respective supply channels associated supply lines, this embodiment allows in particular a pivoting of a flame generated in the combustion chamber of the combustion media in the treatment room.

Alternativ zur vorgenanten Ausführungsform, die ein Verschwenken der Flamme ermöglicht, sieht eine weitere Ausgestaltung der Erfindung vor, dass die Zuführung für das zweite Brennmedium in mindestens drei Zuführungskanäle unterteilt ist, die jeweils durch in vorzugsweise gleichen Winkelabständen angeordnete Strömungstrenner voneinander getrennt sind. Durch eine zyklische Ansteuerung der Armaturen der den jeweiligen Zuführungskanälen zugeordneten Versorgungsleitungen ermöglicht diese Ausgestaltung eine dreidimensionale Positionsänderung, insbesondere eine Rotation einer bei der Verbrennung der Brennmedium in dem Behandlungsraum erzeugten Flamme. Werden mehr als drei Zuführungskanäle vorgesehen, kann die Flammengeometrie durch eine Variation der verschiedenen Strömungsdurchflüsse noch stärker gezielt beeinflusst werden.As an alternative to the aforementioned embodiment, which makes it possible to pivot the flame, a further embodiment of the invention provides that the feed for the second combustion medium is subdivided into at least three feed channels, which are separated from one another by flow separators arranged at preferably equal angular intervals. By a cyclical control of the valves of the respective supply channels associated supply lines, this embodiment allows a three-dimensional position change, in particular a rotation of a flame generated in the combustion chamber of the combustion medium in the treatment room. If more than three supply channels are provided, the flame geometry can be more selectively influenced by a variation of the different flow rates.

Die Aufgabe der Erfindung wird auch durch ein Verfahren zum Betreiben der zuvor beschriebenen Vorrichtung gelöst, bei dem ein erstes Brennmedium durch einen Zuführungskanal für das erste Brennmedium und ein zweites Brennmedium durch Zuführungskanäle für das zweite Brennmedium in den Behandlungsraum eingeleitet wird, in welchem das erste Brennmedium mit dem zweiten Brennmedium unter Ausbildung einer Flamme reagiert, wobei die Geometrie der Flamme während des Verbrennungsprozesses durch eine Variation des Strömungsdurchflusses durch die Zuführungskanäle verändert wird.The object of the invention is also achieved by a method for operating the device described above, in which a first combustion medium is introduced through a supply channel for the first fuel and a second fuel medium through supply channels for the second fuel medium in the treatment chamber, in which the first fuel reacts with the second combustion medium to form a flame, wherein the geometry of the flame is changed during the combustion process by a variation of the flow rate through the supply channels.

Vorteilhafterweise wird die Flamme dabei durch eine periodische Abfolge von wechselnden Strömungsdurchflussmengen in den Zuleitungen verschwenkt oder in Rotation gebracht. Hierdurch gelingt eine gleichmäßige Beaufschlagung des Behandlungsraumes mit der Flamme und damit die Herstellung einer gleichmäßigen Wärmeverteilung im Behandlungsraum.Advantageously, the flame is thereby pivoted or rotated by a periodic sequence of changing flow rates in the supply lines. This achieves a uniform admission of the treatment chamber with the flame and thus the production of a uniform heat distribution in the treatment room.

Nachfolgend wird die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert.The invention will be explained in more detail with reference to embodiments shown in the drawing.

In schematischen Ansichten zeigen:

  • Fig, 1a, die Vorderansicht einer erfindungsgemäßen Vorrichtung in einer ersten Ausführungsform,
  • Fig. 1b die Vorrichtung aus Fig. 1a in einem Längsschnitt,
  • Fig 2a, die Vorderansicht einer erfindungsgemäßen Vorrichtung in einer zweiten Ausführungsform,
  • Fig 2b die Vorrichtung nach Fig. 2a in einem Längsschnitt und
  • Fig 2c die Sauerstoffversorgung der Ausführungsform nach Fig. 2a,2b.
In schematic views show:
  • 1a, the front view of a device according to the invention in a first embodiment,
  • FIG. 1b shows the device from FIG. 1a in a longitudinal section, FIG.
  • 2a, the front view of a device according to the invention in a second embodiment,
  • 2b shows the device according to Fig. 2a in a longitudinal section and
  • 2c, the oxygen supply of the embodiment of Fig. 2a, 2b.

Bei der in den Figs. 1a,1b gezeigten Vorrichtung 1 handelt es sich um einen Brennstoff-Sauerstoffbrenner. Die Vorrichtung 1 umfasst eine zentrale Durchführung 3 für ein Zündgas, die auch als Beobachtungskanal für eine an die Durchführung 3 angeschlossene UV-Überwachungseinheit 4 dient. Koaxial zu der Durchführung 3 ist eine Brennstoffzuführung 5 angeordnet, die der Einleitung eines Brennstoffs in einen metallurgischen Behandlungsraum 6 dient. Koaxial um die Brennstoffzuführung 5 herum ist eine Sauerstoffzuführung 8 angeordnet. Die Sauerstoffzuführung 8 ist mittels sich über nahezu die gesamte Längserstreckung der Sauerstoffzuführung 8 angeordneter Trennwände 9,10 in zwei strömungstechnisch voneinander getrennte Sauerstoffzuleitungskanäle 12,13 unterteilt, in die jeweils separate Versorgungsleitungen 14,15 einmünden. Die Versorgungsleitungen 14,15 sind über ein Drei-Wege-Ventil 17 mit einer Sauerstoff-Hauptleitung 18 verbunden, über die Sauerstoff aus einem hier nicht gezeigten Vorratsbehälter, beispielsweise einem Sauerstofftank, herangeführt wird. Die Vorrichtung 1 kann im Übrigen in bekannter und daher hier nicht gezeigter Weise mit einer Kühlung ausgerüstet sein.In the in FIGS. 1a, 1b shown device 1 is a fuel-oxygen burner. The device 1 comprises a central feedthrough 3 for a starting gas, which also serves as an observation channel for a UV monitoring unit 4 connected to the feedthrough 3. Coaxially to the passage 3, a fuel supply 5 is arranged, which serves to introduce a fuel into a metallurgical treatment chamber 6. Coaxial around the fuel supply 5 around an oxygen supply 8 is arranged. The oxygen supply 8 is subdivided by means of partition walls 9, 10 which are arranged over virtually the entire longitudinal extension of the oxygen supply 8 into two oxygen supply channels 12, 13 which are separated from one another by fluid flow and into which separate supply lines 14, 15 each open. The supply lines 14, 15 are connected via a three-way valve 17 to an oxygen main line 18 via which oxygen is supplied from a storage container (not shown here), for example an oxygen tank. Incidentally, the device 1 can be equipped with cooling in a known manner and therefore not shown here.

Beim Betrieb der Vorrichtung 1 wird flüssiger oder gasförmiger Brennstoff, im Ausführungsbeispiel Erdgas, über einen Brennstoffanschluss 20 in die Brennstoffzuführung 5 und von dort in einer Menge von 20 bis 80 m3/h und mit einer Geschwindigkeit im Bereich von 15 - 50 m/s in den Behandlungsraum 6 eingebracht. Über zumindest eine der Sauerstoffzuleitungskanäle 12,13 wird Sauerstoff gleichfalls in den Behandlungsraum 6 eingebracht, wobei durch eine entsprechende Einstellung am Drei-Wege-Ventil 17 der Durchfluss durch die Versorgungsleitungen 14,15 und damit durch die Sauerstoffzuführungen 12,13 jeweils genau eingestellt werden kann. Sauerstoff und Brennstoff vermischen sich innerhalb des Behandlungsraumes 6 im Vorfeld der Brennermündung 21. Über einen Zündgasanschluss 22 wird ein Zündgas durch die Durchführung 3 in den Behandlungsraum 6 eingeleitet, das für die Zündung des Brennstoff-Sauerstoff-Gemisches und die anschließenden Ausbildung einer Flamme vor der Brennermündung 21 sorgt.During operation of the device 1, liquid or gaseous fuel, in the exemplary embodiment natural gas, via a fuel port 20 in the fuel supply 5 and from there in an amount of 20 to 80 m 3 / h and at a speed in the range of 15 - 50 m / s introduced into the treatment room 6. Oxygen is likewise introduced into the treatment chamber 6 via at least one of the oxygen supply ducts 12, 13, wherein the flow through the supply ducts 14, 15 and thus through the oxygen supply lines 12, 13 can each be precisely adjusted by a corresponding setting on the three-way valve 17 , Oxygen and fuel mix within the treatment chamber 6 in the apron of the burner mouth 21 via a Zündgasanschluss 22 a pilot gas is introduced through the passage 3 in the treatment chamber 6, which for the ignition of the fuel-oxygen mixture and the subsequent formation of a flame before Burner mouth 21 provides.

Die sich vor der Mündung 21 des Brenners ausbildende Flamme kann innerhalb des Behandlungsraumes 6 längs einer vertikalen Ebene verschwenkt werden. Hierzu wird das Strömungsverhältnis für die durch die Leitungen 14,15 bzw. die Sauerstoffkanäle 12,13 geführten Sauerstoffmengen verändert. Je mehr Sauerstoff anteilig durch den im Bild oben angeordneten Sauerstoffkanal 13 geführt wird, desto mehr verschwenkt die Flamme in Richtung nach oben, je mehr Sauerstoff anteilig durch den unteren Sauerstoffkanal 12 geführt wird, desto mehr senkt sich die Flamme im Behandlungsraum 6 nach unten. Durch die alternierende Versorgung der Sauerstoffkanäle 12,13 mit einer großen bzw. geringen Menge an Sauerstoff kann die Flamme auch periodisch auf und ab verfahren werden. Die Vorrichtung 1 bietet so eine kostengünstige Möglichkeit, die Position der Flamme innerhalb des Behandlungsraumes 6 kontinuierlich durch Verschwenken zu verändern, ohne dass es hierzu einer aufwändigen baulichen Veränderung in der Wand des Behandlungsraumes 6 oder einer schwenkbaren Aufhängung des Brenners bedarf.The flame forming in front of the mouth 21 of the burner can be pivoted within the treatment space 6 along a vertical plane. For this purpose, the flow ratio for the amounts of oxygen passed through the lines 14,15 and the oxygen channels 12,13 is changed. The more oxygen is passed proportionately through the oxygen channel 13 arranged at the top in the image, the more the flame pivots in the upward direction, the more oxygen is proportionally passed through the lower oxygen channel 12, the more the flame in the treatment chamber 6 is lowered. By the Alternating supply of the oxygen channels 12,13 with a large or small amount of oxygen, the flame can also be moved periodically up and down. The device 1 thus provides a cost-effective way to continuously change the position of the flame within the treatment chamber 6 by pivoting, without the need for this a complex structural change in the wall of the treatment chamber 6 or a pivotal mounting of the burner.

Bei der in den Figuren 2a-2c gezeigte Vorrichtung 30 sind solche Merkmale, die gleichartig zu denen der Vorrichtung 1 sind, mit gleichen Bezugsziffern bezeichnet. Die Vorrichtung 30 unterscheidet sich von der Vorrichtung 1 lediglich im Aufbau der Sauerstoffzuführung 32. Während die Sauerstoffzuführung 8 bei der Vorrichtung 1 in zwei Strömungskanäle 13,14 unterteilt ist, ist die Sauerstoffzuführung 32 mit Hilfe von zwei Strömungstrennern in Form von zumindest weitgehend gasdichten Zwischenwänden 33,34,35 in drei Sauerstoffzuleitungskanäle 36,37,38 unterteilt. Die Sauerstoffzuleitungskanäle 36,37,38 stehen jeweils mit Versorgungsleitungen 39,40,41 in Strömungsverbindung. Die Versorgungsleitungen 39,40,41 sind über einen Verteiler 42 an eine Sauerstoff-Hauptleitung 43 angeschlossen. Zur Steuerung der Strömungsdurchflüsse in den Versorgungsleitungen 39,40,41 sind in diesen jeweils strömungssteuernde Armaturen, beispielsweise Magnetventile 45,46,47 vorgesehen, die von einer zentralen Steuereinheit 49 nach einem vorgegebenen Programm angesteuert werden können. Die Magnetventile 45,46,47 sind jeweils mit einem Bypass 51,52,53 versehen, um auch im Falle eines geschlossenen Magnetventils einen minimalen Strömungsdurchfluss in jeder der Versorgungsleitungen 39,40,41 zu gewährleisten.In the device 30 shown in FIGS. 2a-2c, those features which are similar to those of the device 1 are designated by the same reference numerals. The device 30 differs from the device 1 only in the structure of the oxygen supply 32. While the oxygen supply 8 is divided in the device 1 into two flow channels 13,14, the oxygen supply 32 by means of two flow separators in the form of at least substantially gas-tight partitions 33rd , 34,35 divided into three oxygen supply channels 36,37,38. The oxygen supply channels 36, 37, 38 are each in fluid communication with supply lines 39, 40, 41. The supply lines 39, 40, 41 are connected via a distributor 42 to an oxygen main line 43. To control the flow rates in the supply lines 39,40,41 each flow-controlling valves, for example, solenoid valves 45,46,47 are provided in these, which can be controlled by a central control unit 49 according to a predetermined program. The solenoid valves 45, 46, 47 are each provided with a bypass 51, 52, 53 in order to ensure a minimum flow throughflow in each of the supply lines 39, 40, 41 even in the case of a closed solenoid valve.

Beim Betrieb der Vorrichtung 30 wird Brennstoff, beispielsweise Erdgas, über die Brennstoffzuführung 5 in den Behandlungsraum 6 eingeleitet. Gleichzeitig wird über mindestens eine der Sauerstoffzuleitungskanäle 36,37,38 Sauerstoff aus der Sauerstoff-Hauptleitung 43 über die Versorgungsleitungen 39,40,41 in den Behandlungsraum 6 eingeleitet. Nach Zündung bildet sich im Behandlungsraum 6 vor der Brennermündung 21 eine Flamme aus.During operation of the device 30, fuel, for example natural gas, is introduced via the fuel feed 5 into the treatment chamber 6. At the same time, oxygen is introduced from the main oxygen line 43 via the supply lines 39, 40, 41 into the treatment chamber 6 via at least one of the oxygen supply channels 36, 37, 38. After ignition, a flame forms in the treatment chamber 6 in front of the burner mouth 21.

Um die Position der Flamme im Behandlungsraum 6 zu verändern, werden die durch die Sauerstoffkanäle 36,37,38 geführten Sauerstoffströme mittels Ansteuerung der Magnetventile 45,46,47 durch die Steuereinheit 49 eingestellt. Eine Asymmetrie in den durch die Sauerstoffzuleitungskanäle 36,37,38 geführten Sauerstoffströme führt zu einer entsprechenden Asymmetrie der Flamme im Behandlungsraum 6. Durch eine zyklische Ansteuerung der Magnetventile 45,46,47 und des damit verbundenen zyklischen Verlaufs der Sauerstoffströme in den Sauerstoffzuleitungskanälen 36,37,38 gelingt eine Rotation der Flamme im Behandlungsraum 6. Durch eine geeignete Wahl der jeweiligen Durchflussmengen und der zeitlichen Abfolge der Ansteuerung kann die Flammenausbreitung und die Rotationsgeschwindigkeit in einem weiten Bereich frei eingestellt und dem jeweiligen Behandlungsraum individuell angepasst werden.In order to change the position of the flame in the treatment chamber 6, the oxygen streams guided through the oxygen channels 36, 37, 38 are set by the control unit 49 by driving the solenoid valves 45, 46, 47. An asymmetry in the guided through the oxygen supply channels 36,37,38 oxygen flows leads to a corresponding asymmetry of the flame in the treatment chamber 6. By a cyclical control of the solenoid valves 45,46,47 and the associated cyclical course of the oxygen streams in the oxygen supply channels 36,37 38, a rotation of the flame in the treatment chamber 6 succeeds. By a suitable choice of the respective flow rates and the timing of the control, the flame propagation and the rotational speed can be freely set in a wide range and individually adapted to the respective treatment room.

Es ist bei der Vorrichtung 30 durch eine geeignete Wahl der entsprechenden Strömungsdurchflüsse, auch möglich, die Flamme längs einer Ebene, die nicht vertikal sein muss, im Behandlungsraum 6 zu verschwenken. Die hierzu erforderlichen Strömungsdurchflüsse werden beispielsweise vor Beginn der Behandlung empirisch ermittelt.It is possible in the device 30 by a suitable choice of the corresponding flow rates, also possible to pivot the flame along a plane which does not have to be vertical in the treatment space 6. The flow rates required for this purpose are determined empirically, for example, before the beginning of the treatment.

Die Vorrichtungen 1,30 können ohne umfangreiche bauliche Maßnahmen auch in bestehende Behandlungsräume eingebaut werden. Sie sind preiswert im Aufbau und leicht zu bedienen.The devices 1,30 can be installed without extensive structural measures in existing treatment rooms. They are inexpensive in construction and easy to use.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1.1. Vorrichtungcontraption 30.30th Vorrichtungcontraption 2.Second -- 31.31st -- 3.Third Durchführungexecution 32.32nd Sauerstoffzuführungoxygen supply 4.4th UV-ÜberwachungseinheitUV monitoring unit 33.33rd Zwischenwandpartition 5.5th Brennstoffzuführungfuel supply 34.34th Zwischenwandpartition 6.6th Behandlungsraumtreatment room 35.35th Zwischenwandpartition 7.7th -- 36.36th SauerstoffzuleitungkanalOxygen supply channel 8.8th. Sauerstoffzuführungoxygen supply 37.37th SauerstoffzuleitungkanalOxygen supply channel 9.9th Trennwandpartition wall 38.38th SauerstoffzuleitungkanalOxygen supply channel 10.10th Trennwandpartition wall 39.39th Versorgungsleitungsupply line 11.11th -- 40.40th Versorgungsleitungsupply line 12.12th SauerstoffzuleitungskanalOxygen supply channel 41.41st Versorgungsleitungsupply line 13.13th SauerstoffzuleitungskanalOxygen supply channel 42.42nd Verteilerdistributor 14.14th Versorgungsleitungsupply line 43.43rd Sauerstoff-HauptleitungOxygen header 15.15th Versorgungsleitungsupply line 44.44th -- 16.16th -- 45.45th Magnetventilmagnetic valve 17.17th Drei-Wege-VentilThree-way valve 46.46th Magnetventilmagnetic valve 18.18th Sauerstoff-HauptleitungOxygen header 47.47th Magnetventilmagnetic valve 19.19th -- 48.48th -- 20.20th Brennstoffanschlussfuel connection 49.49th zentrale Steuereinheitcentral control unit 21.21st Brennermündungburner mouth 50.50th -- 22.22nd ZündgasanschlussPilot gas 51.51st Bypassbypass 52.52nd Bypassbypass 53.53rd Bypassbypass

Claims (11)

Vorrichtung zum Eindüsen von Brennmedien, wie Brennstoff oder Oxidationsmittel, in einen metallurgischen Behandlungsraum (6), mit einem oder mehreren Zuführungskanälen (5) für ein erstes Brennmedium und wenigstens zwei Zuführungskanälen (12,13,26,37,38) für ein zweites Brennmedium, die in einem Mündungsbereich (21) der Vorrichtung ausmünden,
dadurch gekennzeichnet, dass die Zuführungskanäle (12,13,26,37,38) für das zweite Brennmedium jeweils mit strömungstechnisch voneinander getrennten Versorgungsleitungen (14,15,39,40,41) verbunden sind, in denen Einrichtungen (17,45,46,47) zur separaten Regelung des Strömungsdurchflusses vorgesehen sind.Apparatus for injecting combustion media, such as fuel or oxidant, into a metallurgical treatment space (6), with one or more supply channels (5) for a first fuel and at least two supply channels (12, 13, 26, 37, 38) for a second fuel which terminate in a mouth region (21) of the device,
characterized in that the supply channels (12,13,26,37,38) for the second fuel medium in each case with fluidically separated supply lines (14,15,39,40,41) are connected, in which means (17,45,46 , 47) are provided for separate control of the flow rate. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Versorgungsleitungen (14,15,39,40,41) mit einer Versorgungseinheit für das zweite Brennmedium, etwa ein Tank oder eine Rohrleitung, in Strömungsverbindung stehen.Apparatus according to claim 1, characterized in that the supply lines (14,15,39,40,41) are in flow communication with a supply unit for the second combustion medium, such as a tank or a pipe. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Versorgungsleitungen (14,15,39,40,41) jeweils mit Armaturen (17,45,46,47) zur Begrenzung des Strömungsdurchflusses ausgerüstet sind, die mit einer Steuereinheit (49) in Datenverbindung stehen, mittels der die Strömungsdurchflüsse durch die Versorgungsleitungen (14,15,39,40,41) nach einem vorgegebenen Programm steuerbar sind.Apparatus according to claim 4, characterized in that the supply lines (14,15,39,40,41) are each equipped with valves (17,45,46,47) for limiting the flow rate, the with a control unit (49) in data communication are, by means of the flow rates through the supply lines (14,15,39,40,41) are controllable according to a predetermined program. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass als Armaturen (17,45,46,47) motorgetriebene Ventile oder Magnetventile zum Einsatz kommen.Apparatus according to claim 4 or 5, characterized in that come as valves (17,45,46,47) motor-driven valves or solenoid valves are used. Vorrichtung nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die Armaturen (17,45,46,47) jeweils mit einem Bypass (51,52,53) versehen sind, um einen minimalen Strömungsdurchfluss durch die Versorgungsleitung (39,40,41) zu gewährleisten.Device according to one of claims 2 to 5, characterized in that the fittings (17,45,46,47) are each provided with a bypass (51,52,53) to a minimum flow rate through the supply line (39,40, 41). Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch einen axialen Zuführungskanal (5) für das erste Brennmedium, der koaxial von einer Zuführung für das zweite Brennmedium umschlossen ist, die zumindest auf ihrem vom Mündungsbereich (21) gesehen hinteren Abschnitt in strömungstechnisch voneinander separierten Zuführungskanäle (12,13,26,37,38) unterteilt ist.Device according to one of the preceding claims, characterized by an axial feed channel (5) for the first fuel medium, which is coaxially enclosed by a feed for the second fuel medium, which at least on its rear portion seen from the mouth region (21) in flow-separated feed channels ( 12,13,26,37,38) is divided. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass, um eine zweidimensionale Positionsänderung einer bei der Verbrennung der Brennmedien im Behandlungsraum (6) erzeugten Flamme zu ermöglichen, die Zuführung (8) für das zweite Brennmedium in zwei, durch gegenüberliegend angeordnete Strömungstrenner (9,10) voneinander getrennte Zuführungskanäle (12,13), unterteilt ist.Apparatus according to claim 6, characterized in that , in order to allow a two-dimensional change in position of a combustion chamber in the combustion chamber combustion medium (6) generated flame, the supply (8) for the second fuel medium in two, by oppositely disposed flow separator (9,10 ) is separated from each other feed channels (12,13). Vorrichtung nach Anspruch 6,dadurch gekennzeichnet, dass, um eine dreidimensionale Positionsänderung einer durch die Verbrennung der Brennmedium in dem Behandlungsraum zu ermöglichen, die Zuführung (32) für das zweite Brennmedium in mindestens drei Zuführungskanäle (36,37,38) unterteilt ist, die durch in vorzugsweise gleichen Winkelabständen angeordnete Strömungstrenner (33,34,35) voneinander getrennt sind.Apparatus according to claim 6, characterized in that , in order to allow a three-dimensional position change of one by the combustion of the fuel medium in the treatment space, the feed (32) for the second fuel medium is divided into at least three supply channels (36,37,38) are separated from each other by flow separators (33, 34, 35) arranged at preferably equal angular intervals. Verfahren zum Betreiben einer Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein erstes Brennmedium durch einen Zuführungskanal (5) für das erste Brennmedium und ein zweites Brennmedium durch Zuführungskanäle (12,13,36,37,38) für das zweite Brennmedium in den Behandlungsraum (6) eingeleitet wird, in welchem das erste Brennmedium mit dem zweiten Brennmedium unter Ausbildung eine Flamme reagiert, wobei die Geometrie der Flamme während des Verbrennungsprozesses durch eine Variation der Strömungsdurchflüsse durch die Zuführungskanäle (12,13,36,37,38) verändert wird.Method for operating a device according to one of the preceding claims, characterized in that a first combustion medium is introduced through a supply channel (5) for the first combustion medium and a second combustion medium through supply channels (12, 13, 36, 37, 38) for the second combustion medium the treatment space (6) is introduced, in which the first combustion medium reacts with the second combustion medium to form a flame, wherein the geometry of the flame during the combustion process by a variation of the flow rates through the supply channels (12,13,36,37,38) is changed. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Flamme durch eine periodische Abfolge von wechselnden Strömungsdurchflüssen in den Zuführungskanälen (12,13,36,37,38) verschwenkt oder in Rotation gebracht wird.A method according to claim 9, characterized in that the flame by a periodic sequence of changing flow rates in the supply channels (12,13,36,37,38) is pivoted or rotated. Verfahren nach Anspruch 10 oder 11, dadurch gekennzeichnet, dass als erstes Brennmedium ein Brennstoff, etwa Erdgas, und als zweites Brennmedium ein Oxidationsmittel zum Einsatz kommt.A method according to claim 10 or 11, characterized in that as the first combustion medium, a fuel, such as natural gas, and as the second combustion medium, an oxidizing agent is used.
EP07100966.6A 2006-02-21 2007-01-23 Burner Active EP1821036B1 (en)

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EP1821036B1 (en) 2016-06-22
DE102006007979A1 (en) 2007-09-06

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