EP3882548A1 - Tube de brûleur, module de tube de brûleur et unité de brûleur - Google Patents

Tube de brûleur, module de tube de brûleur et unité de brûleur Download PDF

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Publication number
EP3882548A1
EP3882548A1 EP21162770.8A EP21162770A EP3882548A1 EP 3882548 A1 EP3882548 A1 EP 3882548A1 EP 21162770 A EP21162770 A EP 21162770A EP 3882548 A1 EP3882548 A1 EP 3882548A1
Authority
EP
European Patent Office
Prior art keywords
burner
elevations
burner tube
tube
unit
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.)
Pending
Application number
EP21162770.8A
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German (de)
English (en)
Inventor
Alexander Mueller
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.)
Primetals Technologies Germany GmbH
Original Assignee
Primetals Technologies Germany GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Germany GmbH filed Critical Primetals Technologies Germany GmbH
Publication of EP3882548A1 publication Critical patent/EP3882548A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/20—Arrangements of heating devices
    • F27B3/205—Burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/22—Arrangements of air or gas supply devices
    • F27B3/225—Oxygen blowing

Definitions

  • the invention relates to a burner tube for use in a burner unit or burner-lance unit of a metallurgical plant, preferably in an electric arc furnace.
  • This consists of a hollow body with an inner surface and an outer surface, as well as a gas inlet side and a gas outlet side, the burner tube having a longitudinal extension along a longitudinal axis, between the gas inlet side and the gas outlet side.
  • the invention also relates to a furnace, in particular a metallurgical furnace, with a furnace space.
  • burners and lances directed into the furnace interior are used.
  • Combined burner lance units are also known, such as the EP3177743B1 .
  • the burner-lance unit When the burner-lance unit is operated in the burner mode, it generates a flame in order to introduce energy into the furnace chamber.
  • the burner-lance unit can be switched from burner mode to lance mode and used as a lance. In the lance mode, a gas stream is blown into the furnace chamber in order to carry out measurements on the molten metal if necessary.
  • the burner lance units have at least two gas connections, one being provided for the fuel and one for the fuel gas.
  • the fuel gas can also be used in lance mode. A thorough mixing of fuel and fuel gas is desirable for optimal operation.
  • the fuel in particular natural gas, oil and the like, is burned with the addition of the fuel gas - containing oxygen. But there is In addition to the burner-lance units, there are also pure burner units, which are therefore only intended for burner operation.
  • the EP 1136776 A2 an apparatus for introducing solid fuels into a cement kiln is shown.
  • WO 2006021543 A1 is a mixer arrangement for the formation of a fuel-air mixture which can be combined with a burner arrangement of a heat engine.
  • the object of the present invention is to create a burner tube, a burner assembly or a burner unit which directs the fuel gas and the fuel in such a way that the fuel and burner gas are thoroughly mixed immediately upon exit from the burner.
  • the object is achieved by a burner nozzle in that the inner surface and the outer surface each have at least three elevations in the circumferential direction, each with a longitudinal extension in the direction of the longitudinal axis.
  • the elevations have two elevation side surfaces which extend along the longitudinal axis. In the direction of the gas inlet side to the gas outlet side, the elevation side surfaces have an angular amount of 5 ° -45 ° to the longitudinal axis.
  • the elevation side surfaces or the elevations which are closest in the radial direction on the inner surface and the outer surface each have a different sign of the angle.
  • the purpose of the elevations is that - after the burner tube has been installed in a burner or a burner-lance unit - a channel is formed between the elevations.
  • the channel is from the gas inlet side in the direction of the Gas flows through the gas outlet side, and due to the orientation of the elevation side surfaces, the gas is channeled in such a way that it leaves the channel at a certain angle on the gas outlet side.
  • the channel that results from this has a direction vector that is not parallel to the longitudinal axis. These direction vectors deviate from the longitudinal axis by 5 ° - 45 °.
  • the direction vectors of the channel which results from the elevations on the inner surface and that which results from the elevations on the outer surface, also have a different direction.
  • the burner nozzle element has three elevations, at least three channels are formed.
  • the elevations are each attached to the outer surface and the inner surface.
  • a channel is formed between two elevations on the outer surface and on the inner surface. Seen in the radial direction, there is a channel on the inner surface and there is also a channel on the outer surface in the same radial direction.
  • These elevation side surfaces of these two channels - each viewed in the direction of the same radial vector - have a different sign of the angle.
  • the values of the angle can be the same or differ from one another within the specified range.
  • the elevation side surfaces do not necessarily have to be linear in the longitudinal direction. These can also have a curved design.
  • the exit angle of a gas jet is always decisive for determining the angle. This means that a tangent applied to the gas outlet side is always used to determine the angle.
  • This design results in better mixing of fuel gas and fuel, since the two gas flows cross one another when they exit on the gas outlet side. Without this improved mixing, the gases only mix at a later distance from the nozzle. This means that in the vicinity of the burner there is initially a cold zone with little combustion.
  • a preferred embodiment provides that the inner surface and the outer surface are concentric to one another are arranged. It has therefore proven to be advantageous if the inner surface and the outer surface have an elliptical or circular shape.
  • An expedient embodiment provides that the burner tube is designed in such a way that it can be manufactured using an additive manufacturing method.
  • the burner tube can be easily manufactured using the additive manufacturing process.
  • a particularly preferred embodiment provides that the outer surface has at least five, preferably at least ten and particularly preferably at least fifteen elevations. The number of increases is determined, among other things, by what gas exit velocity is desired.
  • a channel is formed between two elevations and the dimensions of the respective channels can be used, among other things, to adjust the gas exit speed.
  • Another particularly preferred embodiment provides that the inner surface have at least five, preferably at least ten and particularly preferably fifteen elevations.
  • a length of the elevations in the longitudinal direction corresponds to at least 1.5 times a distance between two - in the circumferential direction - immediately adjacent elevation side surfaces of two different elevations, measured on the gas outlet side.
  • the length of the elevations should therefore be at least 1.5 times the distance from the channel that results between two elevations.
  • the distance is determined, for example, in the case of a greater distance between the elevations, by the radian dimension in the middle of a height of the elevation - viewed in the radial direction.
  • the distance used is that which is available on the gas outlet side. In the case of a large number of elevations, the distance can be the width between the side surfaces of two adjacent elevations.
  • the length of the elevation is measured by the extension in the longitudinal direction, the inclination about the longitudinal axis being taken into account when determining the length.
  • the length of the elevations makes it possible for a gas flow to be directed even more precisely on the gas outlet side and thus for the gas flows to cross over even more reliably.
  • the body is a lance tube with a Laval nozzle.
  • the burner unit also has the option of operating a lance. This is then referred to as the burner-lance unit.
  • a preferred embodiment provides that in a partial area of the longitudinal extent on the gas inlet side there is a gas inlet area on the outer surface and on the inner surface which has no elevations. There should therefore be an area in front of the partial area with the elevations in which the gas can flow in and can then be divided up through the channels formed between the elevations.
  • the object according to the invention is also achieved by the burner assembly mentioned at the beginning.
  • the burner assembly is designed in such a way that there are at least three elevations in the circumferential direction between the body and the burner tube and on the burner tube outer surfaces, each of which has a longitudinal extension along the longitudinal axis at least in partial areas.
  • the elevations each have two elevation side surfaces which extend along the longitudinal axis. In the direction of the gas inlet side to the gas outlet side, the elevation side surfaces have an angular amount of 5 ° -45 ° to the longitudinal axis.
  • the elevation side surfaces which are closest in the radial direction to the body outer surface and the burner tube outer surface each have a different one Sign of the angle.
  • the body can either be the lance tube - in the case of a burner lance unit - or, for example, a dummy body - in the case of a pure burner unit. It is conceivable that the burner tube and the body are connected by elevations - that is, they consist of one component. In an advantageous embodiment, the body and the burner tube have a circular cross section or a circular tube cross section. However, ellipticals or similar cross-sections are also conceivable. The same effects result as already described for the burner tube.
  • a preferred embodiment provides that the body outer surface has at least five, preferably at least ten and particularly preferably fifteen elevations.
  • a particularly preferred embodiment provides that the burner tube outer surface has at least five, preferably at least ten and particularly preferably fifteen elevations.
  • a length of the elevations in the longitudinal direction corresponds to at least 1.5 times a distance between two - in the circumferential direction - immediately adjacent elevation side surfaces of two different elevations, measured on the gas outlet side.
  • a preferred embodiment provides that in a partial area of the longitudinal extent on the gas inlet side there is a gas inlet area on the outer surface and on the inner surface which has no elevations. There should therefore be an area in front of the partial area with the elevations in which the gas can flow in and can then be divided up through the channels formed between the elevations. Mixing of fuel gas and fuel should only take place after the gas has escaped.
  • the body is a lance tube with a Laval nozzle.
  • the burner unit also has the option of operating a lance. This is then referred to as the burner lance unit.
  • a particularly advantageous embodiment provides that the burner tube is designed according to claims 1-5. This results in a particularly simple design of the burner unit.
  • An expedient embodiment provides that there are at least five, preferably at least ten and particularly preferably fifteen elevations between the body and the burner tube.
  • An expedient embodiment provides that there are at least five, preferably at least ten and particularly preferably fifteen elevations between the burner tube and the cooling tube.
  • a length of the elevations in the longitudinal direction corresponds to at least 1.5 times a distance between two - in the circumferential direction - immediately adjacent elevation side surfaces of two different elevations, measured on the gas outlet side.
  • a preferred embodiment provides that a gas connection is connected exclusively to an interspace between the burner tube and the cooling tube and a gas connection is exclusively connected to an interspace between the body and the burner tube.
  • the object according to the invention is also achieved by the furnace mentioned at the beginning, which has at least one burner unit previously described or described according to claims 10-14, with a gas outlet side of the burner-lance unit pointing in the direction of the furnace chamber. It is preferably a metallurgical furnace such as an electric arc furnace and the like.
  • the burner tube 1 has a gas inlet side 2 and a gas outlet side 3.
  • the burner tube 1 has elevations 4 with elevation side surfaces 4a which are present on both an outer surface 1a and an inner surface 1b.
  • the elevations 4 extend along the longitudinal axis 1c.
  • the elevation side surfaces 4a - both on the inner surface 1b and on the outer surface 1c - have a direction with an angular deviation between 5 ° and 45 ° with respect to the longitudinal axis 1c.
  • a fuel flow 6 flowing through in a burner or burner lance unit - which flows between the elevations 4 of the inner surface 1b - crosses on the gas outlet side 3 with a flowing fuel gas flow 7 - which flows between the elevations 5 of the outer surface 1a.
  • a plan view of the burner tube 1 is shown.
  • the angles ⁇ 1 - which defines an angular deviation of the upper elevation side surface 4b from a longitudinal axis 1c - and ⁇ 2 - which defines an angular deviation of the lower elevation side surface 4c from the longitudinal axis 1c - is shown.
  • the two angles ⁇ 1 and a2 point in opposite directions - that is, they have different signs.
  • the angular amounts of the angles ⁇ 1 and ⁇ 2 can have different values.
  • the figure also shows the distance A between two immediately adjacent elevation side surfaces 4c of two different elevations 4 in each case.
  • the length L is determined in the longitudinal direction, the length resulting from the respective angles ⁇ 1 and ⁇ 2 - as in Fig. 2 shown.
  • FIG. 3 is a schematic representation of a plan view of the gas outlet side of a burner unit 10 is shown.
  • This consists of a body 11 - which is a lance tube in this illustration - a burner tube 12 and a cooling tube 13.
  • the elevations 4 which have a rearwardly sloping side surface 4c.
  • the elevation 4 can also be seen between the burner tube 12 and the cooling tube 13, but the elevation side surface 4b having a different angular profile to the elevation side surface 4c.
  • Several elevations are arranged in the circumferential direction U. The distance A from two immediately adjacent raised side surfaces 4c is determined in this embodiment by the radian measure.
  • FIG. 4 is a simplified schematic representation of a burner unit 10 - in this embodiment with a lance tube with a Laval nozzle 11b - shown as a section.
  • the body 11, the burner tube 12, the cooling tube 13 and the elevations 4 are shown.
  • the burner tube 1 and the body 11 extend from the gas inlet side 2 to the gas outlet side 3 along the longitudinal axis 1c.
  • the elevations 4 are each arranged between the burner tube inner surface 1b and the body outer surface 11a, as well as on the burner tube outer surface 1a.
  • the fuel flow 6 and the fuel gas flow 7 exit.
  • a fuel gas is introduced through a fuel gas connection 23 and a fuel is introduced through a fuel connection 22.
  • a section of a burner tube 1 is shown.
  • the course of the upper elevation side surface 4b and the lower elevation side surface 4c is shown.
  • the fuel gas flow 6 and the fuel flow 7 intersect on the gas outlet side 3.
  • Fig. 6 shows schematically a furnace 20 with a burner unit 10.
  • the furnace 20 has a furnace vessel 20a and a furnace lid 20b.
  • a metal melt 25 is located inside the furnace vessel 20a.
  • the burner unit 10 is mounted in a burner panel 14. However, it is also possible for the burner unit 10 to be installed directly in a side wall of the furnace 20.
  • the gas outlet side 3 of the burner unit 10 points into the furnace chamber 26 in one direction of the molten metal 25.
  • the burner unit 10 has a gas connection 21, a fuel connection 22, a fuel gas connection 23 and coolant connections 24.
  • a cooling system could also be integrated in the burner panel 14 .
  • Fig. 7 is a schematic representation of a plan view of the gas outlet side of a burner assembly 10 is shown.
  • This consists of a body 11 and a burner tube 12.
  • the elevations 4 which have a side surface 4c extending obliquely to the rear.
  • the elevation 4 is also on the outer surface 1a of the burner tube 1, wherein - viewed in the radial direction R - the elevation side surface 4b has a different direction to the elevation side surface 4c.
  • the elevations 4 are arranged several times in the circumferential direction U.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP21162770.8A 2020-03-20 2021-03-16 Tube de brûleur, module de tube de brûleur et unité de brûleur Pending EP3882548A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20164456.4A EP3882547A1 (fr) 2020-03-20 2020-03-20 Tube de brûleur, module de tube de brûleur et unité de brûleur

Publications (1)

Publication Number Publication Date
EP3882548A1 true EP3882548A1 (fr) 2021-09-22

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EP20164456.4A Withdrawn EP3882547A1 (fr) 2020-03-20 2020-03-20 Tube de brûleur, module de tube de brûleur et unité de brûleur
EP21162770.8A Pending EP3882548A1 (fr) 2020-03-20 2021-03-16 Tube de brûleur, module de tube de brûleur et unité de brûleur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20164456.4A Withdrawn EP3882547A1 (fr) 2020-03-20 2020-03-20 Tube de brûleur, module de tube de brûleur et unité de brûleur

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136776A2 (fr) 2000-03-22 2001-09-26 ITALCEMENTI S.p.A. Dispositif pour injecter des carburants solides atomisés dans un four de cimenterie
WO2006021543A1 (fr) 2004-08-27 2006-03-02 Alstom Technology Ltd Systeme melangeur
US20100089383A1 (en) * 2008-10-13 2010-04-15 Curtis Richard Cowles Submergible Combustion Burner
US20130146680A1 (en) * 2011-12-09 2013-06-13 United States Steel Corporation Injection lance with variable swirl
US20150033752A1 (en) 2012-03-13 2015-02-05 Siemens Aktiengesellschaft Gas turbine combustion system and method of flame stabilization in such a system
US20150233644A1 (en) * 2012-08-27 2015-08-20 Outotec (Finland) Oy Arrangement for feeding fine-grained matter to a concentrate or matte burner of a suspension smelting furnace
EP2925683A1 (fr) * 2012-11-30 2015-10-07 Corning Incorporated Brûleur à tourbillon et procédé pour une fusion par combustion en immersion
EP3058276A1 (fr) * 2013-10-17 2016-08-24 Hatch Pty Ltd Appareil de dispersion
EP3177743B1 (fr) 2014-08-08 2018-07-18 Primetals Technologies Austria GmbH Unité de lance de brûleur

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136776A2 (fr) 2000-03-22 2001-09-26 ITALCEMENTI S.p.A. Dispositif pour injecter des carburants solides atomisés dans un four de cimenterie
WO2006021543A1 (fr) 2004-08-27 2006-03-02 Alstom Technology Ltd Systeme melangeur
US20100089383A1 (en) * 2008-10-13 2010-04-15 Curtis Richard Cowles Submergible Combustion Burner
US20130146680A1 (en) * 2011-12-09 2013-06-13 United States Steel Corporation Injection lance with variable swirl
US20150033752A1 (en) 2012-03-13 2015-02-05 Siemens Aktiengesellschaft Gas turbine combustion system and method of flame stabilization in such a system
US20150233644A1 (en) * 2012-08-27 2015-08-20 Outotec (Finland) Oy Arrangement for feeding fine-grained matter to a concentrate or matte burner of a suspension smelting furnace
EP2925683A1 (fr) * 2012-11-30 2015-10-07 Corning Incorporated Brûleur à tourbillon et procédé pour une fusion par combustion en immersion
EP3058276A1 (fr) * 2013-10-17 2016-08-24 Hatch Pty Ltd Appareil de dispersion
EP3177743B1 (fr) 2014-08-08 2018-07-18 Primetals Technologies Austria GmbH Unité de lance de brûleur

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