EP4365490B1 - Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité - Google Patents

Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité Download PDF

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Publication number
EP4365490B1
EP4365490B1 EP24159966.1A EP24159966A EP4365490B1 EP 4365490 B1 EP4365490 B1 EP 4365490B1 EP 24159966 A EP24159966 A EP 24159966A EP 4365490 B1 EP4365490 B1 EP 4365490B1
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EP
European Patent Office
Prior art keywords
comburent
extension direction
partially
flow
supply conduit
Prior art date
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Application number
EP24159966.1A
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German (de)
English (en)
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EP4365490C0 (fr
EP4365490A2 (fr
EP4365490A3 (fr
Inventor
Riccardo PANCOLINI
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CIB Unigas SpA
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CIB Unigas SpA
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Priority claimed from IT102022000018690A external-priority patent/IT202200018690A1/it
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Publication of EP4365490A2 publication Critical patent/EP4365490A2/fr
Publication of EP4365490A3 publication Critical patent/EP4365490A3/fr
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Publication of EP4365490C0 publication Critical patent/EP4365490C0/fr
Publication of EP4365490B1 publication Critical patent/EP4365490B1/fr
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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
    • F23D14/20—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
    • F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2204/00—Burners adapted for simultaneous or alternative combustion having more than one fuel supply
    • F23D2204/10—Burners adapted for simultaneous or alternative combustion having more than one fuel supply gaseous and liquid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14003—Special features of gas burners with more than one nozzle

Definitions

  • the object of the present invention is an end apparatus for a burner and a burner.
  • the end apparatus for a burner that is the object of the present invention is adapted to be applied to burners that have to be installed in a combustion chamber, particularly on boilers for generating hot water or steam, diathermic oil boilers, kilns, dryers, etc ...but can also be applied to air duct solutions.
  • the burners can be supplied with combustion gas or diesel or mixtures (gas and diesel or gas and naphtha or yet another mixture that is not expressly indicated here).
  • the burners generally comprise a fan or a supply conduit for supplying the comburent, a supply conduit for supplying the fuel and a combustion head, i.e. the front part of the burner adapted to generate and support the flame, optimising mixing of the fuel and the comburent and maintaining stability thereof during operation.
  • the end apparatus comprises the combustion head that has in the zone adapted to generate the flame a diffuser that is usually of discoid or truncated conical shape.
  • the diffuser is normally provided with uniformly distributed passage holes or gaps that enable the comburent air to pass into the mixing zone with the fuel and the flame to be ignited and maintained.
  • the diffuser retains the flame near the end part of the combustion head to enable the flame to be supported.
  • the outer tubular casing conveys, with the cylindrical body thereof, the comburent air blown by the fan of the burner.
  • the object of the present invention is to make an end apparatus for a burner and a burner that obviate the aforementioned drawbacks.
  • An object of the present invention is moreover to make an end apparatus for a burner and a burner without the use of techniques for recirculating burnt fumes to the flue that are expensive and often involve a reduction in efficiency (and consequently dispensed power) of the machine.
  • a still further object of the present invention is to make an end apparatus for a burner and a burner that enable NOx emissions to be reduced without however increasing the value of other polluting substances (like for example carbon monoxide), on the contrary maintaining other polluting substances as low as possible.
  • other polluting substances like for example carbon monoxide
  • a yet further object of the invention is to make an end apparatus that can maintain the advantages set out above but with significant adjusting elasticity of the fuel/comburent mixture (range of extended excess air approximately comprised between 1.05 ⁇ 1.35).
  • the reference number 1 has been used to generally designate an end apparatus for a burner, which will be referred to here as apparatus 1 for the sake of descriptive simplicity.
  • the apparatus 1 comprises a combustion head 2 connectable to supply means for supplying a fuel 101 and having at least one inlet opening 3, adapted to enable a fuel to enter, and a plurality of outlet openings 4 adapted to enable an outflow of fuel.
  • a butterfly adjusting valve can be housed (not shown in the drawings).
  • the fuel supplied by the supplying means for supplying a fuel 101 can be natural gas or other gaseous fuels, like LPG, biogas, hydrogen or mixtures with variable H2 content.
  • the apparatus 1 further comprises a comburent supply conduit 5 configured to convey a comburent to the combustion head 2 and extending between a comburent introduction opening 6 of the comburent and an emission opening 7 thereof along a main extension direction "X".
  • the combustion head 2 can have a passage conduit 1000 defining an inlet 1001 and an outlet 1002 through which a flow of comburent "C" can flow.
  • the apparatus 1 can comprise flame ignition means 8, the means being adapted to promote the ignition of the mixture and usable both for the fuel supplied by the supplying means 101, and for the fuel supplied by the further supply conduit 17 (e.g. diesel) which will be discussed subsequently.
  • the combustion head 2 is at least partially inserted into the supply conduit 5, at the emission opening 7, so as to define a passage gap 9 between the combustion head 2 and the supply conduit 5 for the flow of comburent "C".
  • the flow of comburent "C" can comprise a component passing through the outlet 1002 and/or a component passing through the passage gap 9.
  • the combustion head 2 can be movable (both in one direction and the opposite direction) relative to the supply conduit 5 along a movement direction parallel to, preferably coincident with, the main extension direction "X" so as to permit adjustment of the dimensions of the passage gap 9 and thus, of the speed of the flow of comburent "C".
  • the apparatus 1 enables the conformation of the flame to be modified and the extension of the flame to be varied along a direction prevalently parallel to the main extension direction "X".
  • the relative movement between the combustion head 2 and the supply conduit 5 enables the shape of the flame to be varied.
  • the supply conduit 5 can have an end portion 10 defining a convergent profile near the emission opening 7.
  • the end portion 10 determines the convergence of the flow of comburent "C" to the centre of the head, promoting the flame detachment from the surface thereof, apart from the retaining surface 22 that will be disclosed below.
  • the end portion 10 interacting with the combustion head 2 conveys the flow of comburent "C" such that the flame extends and is sustained at a greater distance from the end part of the combustion head 2 relative to prior art apparatuses.
  • the combustion head 2 comprises a plurality of outer openings 11 configured to emit a first flow of fuel "F1" outside the flow of comburent "C".
  • the outer openings 11 are arranged outside the passage gap 9 according to a direction that is radial to the main extension direction "X".
  • the fuel introduced from the openings 11 preferably follows the direction "X".
  • the outer openings 11 are arranged outside the supply conduit 5.
  • the outer openings 11 are arranged on the perimeter of the supply conduit 5.
  • the outer openings 11 are distributed uniformly on the perimeter of the end portion 10 of the supply conduit 5.
  • combustion head 2 comprises a plurality of inner openings 12 arranged at and/or inside the passage gap 9 according to a direction that is radial to the main extension direction "X".
  • the inner openings 12 are adapted to introduce a second flow of fuel "F2', F2"" inside the flow of a comburent "C".
  • first flow of fuel "F1” and of the second flow of fuel “F2', F2”” that join in the flow of comburent in different positions enable the flame to be developed in different zones.
  • first flow of fuel “F1” promotes “delayed” mixing that is achieved forwards in the combustion chamber in direction "X”, owing to the fact that it introduces the comburent by means of relatively big sections (by way of purely non-limiting example, sections having a diameter equal to 15 millimetres) in a zone lacking comburent.
  • the second flow of fuel "F2" owing to the shaped nozzles thereof and with a profile substantially parallel to the end portion 10, tends to diffuse the gas in a rear/radial zone through a recirculating effect with flow reversal.
  • the second flow "F2'” facilitates the retention of the flame by promoting fast mixing with the comburent "C" in a low pressure zone that is substantially arranged at the connecting surface 22 that will be described in greater detail below.
  • the combustion head 2 can comprise a central body 13 extending between a first end 14, defining the inlet opening 3, and a second end 15, distal from the inlet opening 3, along an extension direction "E".
  • extension direction "E” can be parallel to, preferably coincident with, the main extension direction "X".
  • the central body 13 can be at least partially inserted into the supply conduit 5.
  • the second end 15 can define with the supply conduit 5 at least partially the passage gap 9.
  • the second end 15 can define with the end portion 10 of the supply conduit 5 at least partially the passage gap 9.
  • the central body 13 can have an extension that is substantially axially symmetric relative to the extension direction "E".
  • the central body 13 can define with the supply conduit 5 a passage gap 9 having a conformation that is at least partially annular that confers stability and uniformity on the flow of comburent "C" and, thus, on the flame.
  • the central body 13 can have a housing 16 that is adapted to receive in a reversibly inserted manner a supply conduit 17 for supplying a fuel.
  • the housing 16 can extend between the first end 14 and the second end 15 parallel to the extension direction "E".
  • the conduit passage conduit 1000 and the central body 13 are operationally connected so as to define a prolongation of the housing 16.
  • the housing 16 can extend substantially between the inlet 1001 of the passage conduit 1000 and the second end 15 of the central body 13.
  • the further supply conduit 17 can enable the supply of a fuel that is different from the one supplied by the supply conduit 5, for example diesel or fuel oil, ensuring great operating flexibility for the apparatus 1.
  • the apparatus 1 can comprise at least one switch-on conduit 18 in fluid communication with the supply conduit 5 and passing through the central body 13 adapted to insert the aforesaid flame ignition means 8 according to one possible embodiment of the present invention.
  • flame ignition means 8 can exit suitable switch-on openings 18a of the switch-on conduit 18.
  • these switch-on openings 18a can have different positioning along the extension direction "E" without the inventive concept at the basis of the present invention being altered.
  • the switch-on openings 18a can be arranged upstream of the plurality of outflow holes 20b-that will be described in greater detail below.
  • the second end 15 of the central body 13 can have a convergent portion 19, for example truncated conically shaped, along the extension direction "E" and defining with the supply conduit at least partially the passage gap 9.
  • This shaping promotes the detachment of the flame from the second end 15, contributing to move the second end 15 away from the combustion head 2 and at the same time ensuring, also owing to the particular divergent geometry of the profile 21, a zone of minimum flame retention on the retaining surface 22.
  • the convergent portion 19 can have a plurality of outflow holes 20a adapted to introduce at least partially the second flow "F2'" of fuel inside the flow of a comburent "C".
  • the central body 13 can have a plurality of outflow holes 20a, 20b for introducing at least partially the second flow "F2'" of fuel in the flow of a comburent "C".
  • the aforesaid plurality of outflow holes 20a defines at least partially the inner openings 12.
  • the plurality of outflow holes 20a, 20b can have a diameter equal to 2.5 millimetres.
  • the convergent 19 and divergent 21 portions, together with the plurality of outflow holes 20a, 20b contribute to limiting the turbulent formation of components in the flow of comburent "C” and concomitant with the introduction of the second flow of fuel "F2'" inside the flow of comburent "C".
  • Optimum mixing between fuel and comburent in this stage occurs near the surface 22, thus ensuring increased stability of the flame in this zone and thus ensuring reliability, safety and operating elasticity for the burner during the operating step.
  • This elasticity characteristic enables operation with very extensive ⁇ factors (in which ⁇ indicates the excess air coefficient).
  • This stability permitted by the flame anchoring zone at the retaining surface 22, enables the flame to be maintained distant from the combustion head 2 and the need for the diffuser (the aforesaid disc or truncated conical element) in the end zone of the combustion head 2 to be overcome.
  • the apparatus 1 can be devoid of the traditional flame retention diffuser.
  • the absence of the diffuser enables the generation of turbulent zones to be avoided that result in great mixing, enabling the flame to be moved further away from the combustion head 2 and diffusing the flame homogeneously in the volume of the combustion chamber.
  • the reduction of the specific thermal load (W/m3) and the reduction of the temperature of the flame near the head 2 favour a great reduction of the emissions of thermal NOx.
  • this effect enables the influence of thermal stress factors to be reduced, permitting an improvement to the life of the components and the possible application of less noble and expensive materials.
  • the second end 15 can have at least one divergent portion 21 along the extension direction "E".
  • the further supply conduit 17 can be at least partially insertable from the inlet 1001 as far as inside the divergent portion 21, permitting dispensing of the further fuel at the zone of the combustion head 2 adapted to the generation of the flame.
  • the divergent geometry of the profile 21 enables the cone of the spray of the atomizer to be followed, preferably at a solid spray angle comprised between 50° and 70°, ensuring an optimal flame extension of the secondary fuel. Also in this case, the principle of partial flame detachment with partial retention near the retaining surface 22 enables NOx emissions to be kept very small.
  • the plurality of outflow holes 20b can be obtained at least partially on the divergent portion 21 to introduce at least partially the second flow of fuel "F2'" inside the flow of a comburent "C".
  • the plurality of outflow holes 20a, 20b can be provided only on the divergent portion 21 without altering the inventive concept underlying the present invention.
  • outflow holes 20a are made on the convergent portion 19.
  • both the pluralities of outflow holes 20a, 20b as illustrated in appended figures are present.
  • only the plurality of outflow holes 20b and not the outflow holes 20a can be present.
  • the second end 13 has at least one retaining surface 22 (previously mentioned) adapted to connect the divergent portion 21 and the convergent portion 19.
  • the retaining surface 22 can be perpendicular to the extension direction "E".
  • the retaining surface 22 can be at least partially lobe-shaped.
  • the aforesaid flame ignition means 8 can be arranged at least partially inside the divergent portion 21 so as to promote the generation of the flame near the retaining surface 22.
  • the combustion head 2 comprises a plurality of outflow conduits 23 branching off from the first end of the central body 13.
  • the plurality of outflow conduits 23 extends at least partially along a direction parallel to the extension direction "E".
  • the plurality of outflow conduits 23 defines at least partially the aforesaid plurality of outer openings 11.
  • the combustion head 2 can comprise at least one inner nozzle 24, still more preferably a plurality of inner nozzles 24, arranged inside the supply conduit 5 according to a direction that is radial to the main extension direction "X".
  • the at least one inner nozzle 24 can be interposed between the central body 13 and the supply conduit 5 and, preferably, inside the end portion 10 and the passage gap 9.
  • the inner nozzles 24 define a part of said plurality of inner openings 12.
  • the inner nozzles 24 can have a diameter equal to about 16 millimetres.
  • the at least one inner nozzle 24 can have different conformations, for example, circular, oval elliptic or the like without altering the inventive concept underlying the present invention.
  • the at least one inner nozzle 24 can have an extension axis tilted relative to the extension direction "E".
  • the inner nozzle 24 limits the turbulent formation of components inside the flow of comburent "C” and/or the second flow “F2"” promoting the introduction of the second flow “F2”” along a direction substantially parallel to the surface of the convergent portion 19 and 10.
  • the combustion head 2 comprises a plurality of inner nozzles 24 having an extension that is transverse to the extension direction "E" such that the second flow "F2"" is at least partially convergent along the extension direction "E".
  • the combustion head 2 further comprises a plurality of outer nozzles 25 in fluid communication with the inlet opening 3.
  • the outer nozzles 25 can be arranged outside the supply conduit 5 according to a direction that is radial to the main extension direction "X".
  • the outer nozzles 25 can define at least partially the plurality of outer openings 11.
  • the outer nozzles 25 can have an extension substantially parallel to the main extension direction "X" such as to emit the aforesaid first flow "F1" of fuel outside the flow of comburent "C".
  • the first flow "F1" contributes to delaying mixing by enabling the flame to be moved away from the end part of the combustion head 2 according to what has been set out previously.
  • the outer nozzles 25 can be arranged perimetrically to the supply conduit and near the emission opening 7.
  • the inner nozzles and/or the outer nozzles can be an end portion of a respective outflow conduit 23.
  • the present invention refers to a burner 100 comprising an apparatus 1 according to what has been previously disclosed and suction means 102 configured to suck at least one quantity of comburent from an environment outside the burner 100 and to move the quantity from the introduction opening 6 to the emission opening 7.
  • the burner can comprise supplying means for supplying a fuel 101 adapted to supply a fuel to the combustion head 2.
  • the present invention achieves the proposed objects by making an end apparatus for a burner able to reduce NOx emissions owing to the presence of a plurality of outer openings arranged outside the passage gap of the flow of comburent and a plurality of inner openings arranged at and/or inside the passage gap of the comburent operationally connected to move the flame away from the end part of the combustion head.
  • the combustion head 2 works by promoting a diffusing extension of a flame that is thus as homogeneous as possible inside the hearth. This is ensured by progressive combustion and is possible according to the particular conformation of the combustion head 2, in function of the geometry of the convergent portion 19, of the end portion 10 and of the position and the dimension of the nozzles 24, 25 and of the outflow holes 20a, 20b. Owing to this principle, a generally more uniform temperature is ensured with concentrated peaks of value lower than a traditional combustion head in which there is a more localized concentration of flame in the same thermal load conditions [W/m3].

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

Claims (23)

  1. Appareil d'extrémité (1) pour un brûleur, configuré pour générer une flamme, comprenant :
    - une tête de combustion (2) reliable à des moyens d'alimentation pour alimenter un carburant et ayant au moins une ouverture d'entrée (3), adaptée pour permettre à un carburant d'entrer, et une pluralité d'ouvertures de sortie (4), adaptées pour permettre un écoulement de carburant ;
    - un conduit d'alimentation en comburant (5) configuré pour transporter un comburant vers ladite tête de combustion (2) et s'étendant entre une ouverture d'introduction de comburant (6) et une ouverture d'émission (7) le long d'une direction d'extension principale (X) ;
    dans lequel ladite tête de combustion (2) est au moins partiellement insérée dans ledit conduit d'alimentation (5), au niveau de l'ouverture d'émission (7), de manière à définir un espace de passage (9) entre ladite tête de combustion (2) et ledit conduit d'alimentation (5) pour un flux de comburant (C) ;
    dans lequel ladite tête de combustion (2) comprend :
    - une pluralité d'ouvertures extérieures (11) agencées à l'extérieur dudit espace de passage (9) selon une direction qui est radiale à ladite direction d'extension principale (X) et configurées pour émettre un premier flux de carburant (F1) à l'extérieur dudit flux d'un comburant ; et
    - une pluralité d'ouvertures intérieures (12) agencées au niveau et/ou à l'intérieur dudit espace de passage (9) selon une direction qui est radiale à ladite direction d'extension principale (X), lesdites ouvertures intérieures (12) étant adaptées pour introduire un second flux de carburant (F2', F2") à l'intérieur dudit flux d'un comburant ;
    - un corps central (13) au moins partiellement inséré dans ledit conduit d'alimentation (5) et s'étendant entre une première extrémité (14), définissant ladite ouverture d'entrée (3), et une seconde extrémité (15) le long d'une direction d'extension (E) ; ladite seconde extrémité (15) définissant avec ledit conduit d'alimentation (5) au moins partiellement ledit espace de passage (9) ;
    - au moins une buse intérieure (24) agencée à l'intérieur dudit conduit d'alimentation (5) selon une direction qui est radiale à ladite direction d'extension principale (X), ladite buse intérieure (24) définissant au moins partiellement ladite pluralité d'ouvertures intérieures (12) ;
    caractérisé en ce que ladite au moins une buse intérieure (24) est interposée entre ledit corps central (13) et ledit conduit d'alimentation (5).
  2. Appareil selon la revendication 1, dans lequel ledit corps central (13) a une extension sensiblement axialement symétrique par rapport à ladite direction d'extension (E).
  3. Appareil selon la revendication 1 ou 2, dans lequel ladite direction d'extension (E) est parallèle à, de préférence coïncidant avec, ladite direction d'extension principale (X).
  4. Appareil selon une ou plusieurs des revendications précédentes, dans lequel ledit corps central (13) comporte un logement (16) adapté pour recevoir un conduit d'alimentation supplémentaire inséré réversiblement (17) pour alimenter un carburant, ledit logement (16) s'étendant entre ladite première extrémité (14) et ladite seconde extrémité (15) parallèlement à ladite direction d'extension (E).
  5. Appareil selon une ou plusieurs des revendications précédentes, comprenant au moins un conduit de mise sous tension (18) en communication fluidique avec ledit conduit d'alimentation (5) et passant à travers ledit corps central (13) pour transporter une quantité de comburant vers ladite seconde extrémité (15) dudit corps central (13).
  6. Appareil selon une ou plusieurs des revendications précédentes, dans lequel ladite seconde extrémité (15) comporte une portion convergente (19), de préférence en forme de cône tronqué, le long de ladite direction d'extension (E) et définit avec ledit conduit d'alimentation (5) au moins partiellement ledit espace de passage (9).
  7. Appareil selon la revendication 6, dans lequel ladite portion convergente (19) comporte une pluralité de trous d'écoulement (20a) adaptés pour introduire au moins partiellement ledit second flux de carburant (F2') à l'intérieur dudit flux d'un comburant, ladite pluralité de trous d'écoulement (20a) définissant au moins partiellement lesdites ouvertures intérieures (12).
  8. Appareil selon la revendication 6 ou 7, dans lequel ladite seconde extrémité (15) comporte au moins une portion divergente (21) le long de ladite direction d'extension, ladite portion divergente (21) étant agencée au moins partiellement à l'intérieur de ladite portion convergente (19).
  9. Appareil selon la revendication 8, dans lequel ladite portion divergente (21) comporte une pluralité de trous d'écoulement (20b) adaptés pour introduire au moins partiellement ledit second flux de carburant (F2') à l'intérieur dudit flux d'un comburant, ladite pluralité de trous d'écoulement (20b) définissant au moins partiellement lesdites ouvertures intérieures (12).
  10. Appareil selon la revendication 9, dans lequel ladite seconde extrémité (15) comporte au moins une surface de retenue (22) adaptée pour relier ladite portion divergente (21) et ladite portion convergente (19).
  11. Appareil selon la revendication 10, dans lequel ladite surface de retenue (22) est perpendiculaire à ladite direction d'extension (E).
  12. Appareil selon la revendication 10 ou 11, dans lequel ladite surface de retenue (22) est au moins partiellement en forme de lobe.
  13. Appareil selon une ou plusieurs des revendications précédentes, dans lequel ladite tête de combustion (2) comprend une pluralité de conduits d'écoulement (23) se ramifiant à partir de ladite première extrémité (14) dudit corps central (13) et s'étendant au moins partiellement le long d'une direction parallèle à ladite direction d'extension (E), ladite pluralité de conduits d'écoulement (23) définissant au moins partiellement ladite pluralité d'ouvertures extérieures (11) et/ou ladite pluralité d'ouvertures intérieures (12).
  14. Appareil selon une ou plusieurs des revendications précédentes, dans lequel ladite au moins une buse intérieure (24) comporte un axe d'extension incliné par rapport à ladite direction d'extension (E).
  15. Appareil selon une ou plusieurs des revendications précédentes, dans lequel ladite tête de combustion (2) comprend une pluralité de buses intérieures (24) ayant une extension transversale à ladite direction d'extension (E) de manière à ce que ledit second flux est au moins partiellement convergent le long de ladite direction d'extension (E).
  16. Appareil selon une ou plusieurs des revendications précédentes, dans lequel ladite tête de combustion (2) comprend une pluralité de buses extérieures (25) en communication fluidique avec ladite ouverture d'entrée (3) et agencées à l'extérieur dudit conduit d'alimentation (5) selon une direction qui est radiale à ladite direction d'extension principale (X), lesdites buses extérieures (25) définissant au moins partiellement ladite pluralité d'ouvertures extérieures (11).
  17. Appareil selon la revendication 16, dans lequel lesdites buses extérieures (25) ont une extension qui est sensiblement parallèle à ladite direction d'extension principale (X) de manière à émettre ledit premier flux de carburant (F1) à l'extérieur dudit flux d'un comburant.
  18. Appareil selon la revendication 16 ou 17, dans lequel lesdites buses extérieures (25) sont agencées de manière périmétrique par rapport audit conduit d'alimentation (5) et à proximité de ladite ouverture d'émission (7).
  19. Appareil selon une ou plusieurs des revendications précédentes, dans lequel ladite tête de combustion (2) est réversiblement mobile par rapport audit conduit d'alimentation (5) le long d'une direction de déplacement qui est parallèle à, de préférence coïncidant avec, ladite direction d'extension principale (X).
  20. Appareil selon une ou plusieurs des revendications précédentes, dans lequel ledit conduit d'alimentation (5) comporte une portion d'extrémité (10) définissant un profilé convergent à proximité de ladite ouverture d'émission (7).
  21. Appareil selon une ou plusieurs des revendications précédentes, comprenant des moyens d'allumage de flamme (8) adaptés pour favoriser la combustion entre ledit combustible et ledit comburant.
  22. Appareil selon une ou plusieurs des revendications précédentes, dans lequel ladite tête de combustion (2) comporte un conduit de passage (1000) définissant une entrée (1001) et une sortie (1002) à travers lesquelles le flux de comburant (C) peut s'écouler au moins partiellement.
  23. Brûleur, comprenant :
    - un appareil d'extrémité (1) selon une ou plusieurs des revendications précédentes ;
    - des moyens d'aspiration (102) configurés pour aspirer au moins une quantité de comburant d'un environnement extérieur audit brûleur et pour déplacer ladite au moins une quantité de comburant de ladite seconde ouverture d'introduction (6) vers ladite seconde ouverture d'émission (7).
EP24159966.1A 2022-09-13 2022-10-18 Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité Active EP4365490B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT102022000018690A IT202200018690A1 (it) 2022-09-13 2022-09-13 APPARATO TERMINALE COMPRENDENTE UNA TESTA DI COMBUSTIONE A STADI PER BASSE EMISSIONI DI NOx E BRUCIATORE COMPRENDENTE TALE APPARATO TERMINALE
EP22818887.6A EP4359701B1 (fr) 2022-09-13 2022-10-18 Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité
PCT/IB2022/059986 WO2024057081A1 (fr) 2022-09-13 2022-10-18 Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP22818887.6A Division EP4359701B1 (fr) 2022-09-13 2022-10-18 Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité
EP22818887.6A Division-Into EP4359701B1 (fr) 2022-09-13 2022-10-18 Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité

Publications (4)

Publication Number Publication Date
EP4365490A2 EP4365490A2 (fr) 2024-05-08
EP4365490A3 EP4365490A3 (fr) 2024-06-19
EP4365490C0 EP4365490C0 (fr) 2025-04-30
EP4365490B1 true EP4365490B1 (fr) 2025-04-30

Family

ID=90230709

Family Applications (2)

Application Number Title Priority Date Filing Date
EP24159966.1A Active EP4365490B1 (fr) 2022-09-13 2022-10-18 Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité
EP22818887.6A Active EP4359701B1 (fr) 2022-09-13 2022-10-18 Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP22818887.6A Active EP4359701B1 (fr) 2022-09-13 2022-10-18 Appareil d'extrémité comprenant une tête de combustion progressive pour faibles émissions de nox et brûleur comprenant cet appareil d'extrémité

Country Status (4)

Country Link
US (1) US20250093027A1 (fr)
EP (2) EP4365490B1 (fr)
CN (1) CN118541568A (fr)
CA (1) CA3218618A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014169963A1 (fr) * 2013-04-19 2014-10-23 Loesche Gmbh Brûleur central pour système de brûleur multi-lances multi-combustibles
DE102016125526B3 (de) * 2016-12-22 2018-05-30 Max Weishaupt Gmbh Mischvorrichtung und Brennerkopf für einen Brenner mit reduziertem NOx-Ausstoß
IT201900006424A1 (it) 2019-04-29 2020-10-29 Stefano Pesce Testa di combustione con ricircolazione interna e bruciatore comprendente la stessa
CN114183754B (zh) 2020-09-14 2024-04-26 意大利利雅路股份有限公司 燃烧器的燃烧头

Also Published As

Publication number Publication date
CA3218618A1 (fr) 2024-03-13
EP4365490C0 (fr) 2025-04-30
EP4365490A2 (fr) 2024-05-08
US20250093027A1 (en) 2025-03-20
EP4359701A1 (fr) 2024-05-01
CN118541568A (zh) 2024-08-23
EP4359701C0 (fr) 2025-04-23
EP4365490A3 (fr) 2024-06-19
EP4359701B1 (fr) 2025-04-23

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