EP1245901A1 - Brûleur - Google Patents

Brûleur Download PDF

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Publication number
EP1245901A1
EP1245901A1 EP02006779A EP02006779A EP1245901A1 EP 1245901 A1 EP1245901 A1 EP 1245901A1 EP 02006779 A EP02006779 A EP 02006779A EP 02006779 A EP02006779 A EP 02006779A EP 1245901 A1 EP1245901 A1 EP 1245901A1
Authority
EP
European Patent Office
Prior art keywords
outlet
annular wall
nozzle
tapered annular
burner
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.)
Withdrawn
Application number
EP02006779A
Other languages
German (de)
English (en)
Inventor
Guiseppe Toniato
Ilario Spadini
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.)
Riello SpA
Original Assignee
Riello SpA
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 Riello SpA filed Critical Riello SpA
Publication of EP1245901A1 publication Critical patent/EP1245901A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F23D11/40—Mixing tubes; Burner heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber

Definitions

  • the present invention relates to a burner and to a relative burner nozzle.
  • the present invention may be used to advantage in heating systems, to which the following description refers purely by way of example.
  • the present invention relates to a burner of the type comprising a combustion head fitted inside a combustion chamber and in turn comprising a tubular body for feeding a liquid combustion supporter into the combustion chamber, said tubular body comprising an end portion defined by a tubular nozzle having a central outlet and a tapered annular wall tapering towards said central outlet, and housing at least one pipe for supplying a liquid fuel; said pipe terminating inside said nozzle with at least one outlet conduit, and said tapered annular wall having at least one opening connected to said central outlet.
  • the present invention also relates to a combustion head nozzle of innovative characteristics.
  • the nozzle comprises a central outlet and a tapered annular wall tapering towards the central outlet; the tapered annular wall having openings arranged radially with respect to the central outlet; and the nozzle being characterized in that each opening is substantially U-shaped and has a substantially tubular peripheral shell extending outwards from an outer surface of the tapered annular wall.
  • Patent US 5015174 describes a burner of the above type, in which the fuel supply pipe has a number of axial outlet conduits, the outlets of which, set back with respect to the nozzle, are located upstream from a deflecting plate which, together with the nozzle, defines a fuel ignition chamber and radially deflects fuel flow from the outlet conduits to produce, inside the ignition chamber, sufficient turbulence to mix the fuel and combustion supporter in correct stoichiometric proportions and substantially completely ignite the fuel-combustion supporter mixture inside the ignition chamber, i.e. upstream from the central outlet of the nozzle.
  • the gases from the ignition chamber by interacting with the contours of the central outlet and openings formed along the tapered annular wall of the nozzle and not related in number to the number of fuel outlet conduits, generate, downstream from and all around the nozzle, a low pressure capable of drawing towards the nozzle the colder burnt gases inside the combustion chamber.
  • the aim of the above known structure is to mix the stream of colder burnt gases drawn towards the nozzle with the stream of hotter combustion gases from the nozzle, so as to reduce the temperature of the flame and, therefore, the amount of NO X produced. Since, however, in ,the known burner described above, the fuel, as stated, is ignited substantially completely inside the ignition chamber, i.e.
  • the outflow speed of the combustion gases from the nozzle and the violent expansion of the combustion gases downstream from the nozzle prevent the two different-temperature streams from mixing as required, and which can only be achieved by acting mechanically on the two streams by providing, immediately downstream from the nozzle, a flame pipe forming, with the outer surface of the nozzle, an annular opening through which the colder burnt gases are drawn to mix with the combustion gases inside the flame pipe.
  • a burner comprising a combustion head fitted inside a combustion chamber and in turn comprising a tubular body for feeding a liquid combustion supporter into the combustion chamber, said tubular body comprising an end portion defined by a tubular nozzle having a central outlet and a tapered annular wall tapering towards said central outlet, and housing at least one pipe for supplying a liquid fuel; said pipe terminating inside said nozzle with at least one outlet conduit, and said tapered annular wall having at least one opening connected to said central outlet; characterized in that said outlet conduit diverges with respect to a longitudinal axis of said tubular body, and has an outlet which is located inside said nozzle, in a position adjacent to said tapered annular wall, and is oriented towards said tapered annular wall and towards said opening.
  • said opening has a substantially tubular peripheral shell extending outwards from an outer surface of said tapered annular wall in a direction substantially parallel to said longitudinal axis.
  • the burner defined above comprises a number of said outlet conduits arranged about said longitudinal axis; said tapered annular wall having a number of said openings equal to the number of said outlet conduits; and the outlet of each said outlet conduit facing a respective said opening.
  • said openings extend in a substantially radial direction with respect to said central outlet; each said tubular shell defining, with each adjacent tubular shell and with said tapered annular wall, a tapered passage tapering towards said central outlet.
  • Number 1 in Figure 1 indicates as a whole a burner comprising a combustion head 2 extending through a hole formed through an end wall 3 of a combustion chamber 4.
  • Combustion head 2 comprises an outer tubular body 5, which has an outer flange 6 for connection to wall 3 and is connected to a known feed line (not shown) to feed air into combustion chamber 4.
  • Tubular body 5 comprises an end portion defined by a tubular nozzle 7 having a central outlet 8, and a truncated-cone-shaped tapered annular wall 9 tapering towards central outlet 8 and lying in a plane A perpendicular to a longitudinal axis B of tubular body 5.
  • Tapered wall 9 has a number of openings 10 (ten in the Figure 3 example) arranged radially with respect to central outlet 8 and equally spaced about longitudinal axis B.
  • Each opening 10 is substantially in the form of a U connected laterally to central outlet 8, and has a substantially tubular peripheral shell 11 extending outwards from an outer surface 12 of tapered wall 9 in a direction substantially parallel to longitudinal axis B of tubular body 5.
  • Each shell 11 tapers outwards, terminates at plane A, and defines, with each adjacent shell 11, a substantially radial passage 13 tapering towards central outlet 8.
  • a tubular wall 15 is housed inside a portion 14 of tubular body 5 immediately upstream from nozzle 7, is coaxial with tubular body 5, and is connected to flange 6 by a bracket 16 having a known adjusting device 17 for adjusting the axial position of wall 15 with respect to tubular body 5.
  • a pipe 18 for feeding fuel into combustion chamber 4 extends inside tubular body 5 and a chamber 19 defined externally by wall 15.
  • Pipe 18 is fixed to flange 6 and is connected to a known fuel feed line (not shown) by a conduit 20 crosswise to pipe 18 and having a known flow regulating device 21.
  • pipe 18 The outer surface of pipe 18 is fitted with an annular partition 22 crosswise to longitudinal axis B and having airflow openings 23. Downstream from partition 22, pipe 18 has a ring of radial holes 24 for supplying a stream of fuel to an ignition device 25 fitted through and supported by partition 22.
  • a pipe 26 is fitted inside pipe 18 along longitudinal axis B, is fixed to conduit 20 by a fastening member 27, and defines, with pipe 18, an annular conduit 28 closed, at the end facing nozzle 7 and located inside tubular body 5 downstream from partition 22, by a rim 29 integral with the end of pipe 18 facing nozzle 7, and engaged by a corresponding end of pipe 26.
  • Holes 30 are formed through rim 29, are equally spaced about axis B, are equal in number to openings 10, and each house the end of a respective outlet conduit 31 communicating with annular conduit 28 and having an end portion inside nozzle 7. More specifically, each outlet conduit 31 extends along an axis 32 diverging with respect to axis B, extends through a respective opening 10 to intercept respective shell 11, and has an outlet 33 immediately adjacent to tapered annular wall 9 and facing respective opening 10.
  • the combustion supporter and the fuel are therefore mixed correctly in an extremely small portion inside nozzle 7, and for the most part substantially at plane A containing central outlet 8 and the outer ends of shells 11.
  • the root of the flame 34 produced, in use, by ignition of the fuel is located very close to plane A, i.e. very close to where a stream 35 of burnt gases - drawn towards axis B by the low pressure produced by stationary vortexes generated by a stream 36 of the air-fuel mixture issuing from central outlet 8 and the channels defined by shells 11 - mixes with stream 36.
  • the temperature of the flame 34 produced by burner 1 described is reduced by mixing the hotter combustion gases with the colder burnt gases, and by also "diluting" flame 34 along axis B, by moving the root of flame 34 outwards of nozzle 7, and by also mixing streams 35 and 36 substantially at the start of combustion, so that combustion mostly takes place in a substantially oxygen-poor atmosphere.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP02006779A 2001-03-26 2002-03-25 Brûleur Withdrawn EP1245901A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO010178 2001-03-26
IT2001BO000178A ITBO20010178A1 (it) 2001-03-26 2001-03-26 Bruciatore

Publications (1)

Publication Number Publication Date
EP1245901A1 true EP1245901A1 (fr) 2002-10-02

Family

ID=11439223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02006779A Withdrawn EP1245901A1 (fr) 2001-03-26 2002-03-25 Brûleur

Country Status (2)

Country Link
EP (1) EP1245901A1 (fr)
IT (1) ITBO20010178A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783426A1 (fr) * 2005-11-07 2007-05-09 Riello S.p.A. Tête de combustion pour brûleur à gaz
EP2037173A1 (fr) 2007-09-14 2009-03-18 E.C.B. GmbH Tête de brûleur et procédé de combustion à un étage de combustible dans une zone de combustion éloignée de la tête de brûleur
EP1754937A3 (fr) * 2005-08-16 2014-08-20 ELCO Burners GmbH Tête de brûleur et procédé pour brûler du combustible
DE102017114570A1 (de) 2017-06-29 2019-01-03 MIchael Karlowsky Brennerkopf und Verbrennungsverfahren
IT202200015384A1 (it) * 2022-07-21 2024-01-21 Sacmi Forni & Filter S P A Bruciatore, apparato e metodo per la cottura di manufatti ceramici
RU2847707C2 (ru) * 2022-07-21 2025-10-15 Сакми Форни Е Филтер С.П.А. Горелка, устройство и способ обжига керамических изделий

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2821932A1 (de) * 1978-05-19 1979-11-22 Karl Bodemer Mischeinrichtung zur verbrennung von fluessigen kohlenwasserstoffen, insbesondere heizoel und dieseloel
US5015174A (en) * 1988-06-21 1991-05-14 Walter Dreizler Burner head for a forced-air gas burner
DE19542373A1 (de) * 1994-11-14 1996-05-15 Rbl Spa Brennerkopf für Gasbrenner
DE9321525U1 (de) * 1993-07-20 1999-01-28 Elco Klöckner Heiztechnik GmbH, 72379 Hechingen Brenner zur Verbrennung von flüssigen oder gasförmigen Brennstoffen in Feuerungsanlagen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2821932A1 (de) * 1978-05-19 1979-11-22 Karl Bodemer Mischeinrichtung zur verbrennung von fluessigen kohlenwasserstoffen, insbesondere heizoel und dieseloel
US5015174A (en) * 1988-06-21 1991-05-14 Walter Dreizler Burner head for a forced-air gas burner
DE9321525U1 (de) * 1993-07-20 1999-01-28 Elco Klöckner Heiztechnik GmbH, 72379 Hechingen Brenner zur Verbrennung von flüssigen oder gasförmigen Brennstoffen in Feuerungsanlagen
DE19542373A1 (de) * 1994-11-14 1996-05-15 Rbl Spa Brennerkopf für Gasbrenner

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1754937A3 (fr) * 2005-08-16 2014-08-20 ELCO Burners GmbH Tête de brûleur et procédé pour brûler du combustible
EP1783426A1 (fr) * 2005-11-07 2007-05-09 Riello S.p.A. Tête de combustion pour brûleur à gaz
EP2037173A1 (fr) 2007-09-14 2009-03-18 E.C.B. GmbH Tête de brûleur et procédé de combustion à un étage de combustible dans une zone de combustion éloignée de la tête de brûleur
DE102017114570A1 (de) 2017-06-29 2019-01-03 MIchael Karlowsky Brennerkopf und Verbrennungsverfahren
DE102017114570B4 (de) * 2017-06-29 2021-02-04 MIchael Karlowsky Brennerkopf und Verbrennungsverfahren
IT202200015384A1 (it) * 2022-07-21 2024-01-21 Sacmi Forni & Filter S P A Bruciatore, apparato e metodo per la cottura di manufatti ceramici
WO2024018424A1 (fr) * 2022-07-21 2024-01-25 Sacmi Forni & Filter S.p.A. Brûleur, appareil et procédé de cuisson d'articles en céramique
RU2847707C2 (ru) * 2022-07-21 2025-10-15 Сакми Форни Е Филтер С.П.А. Горелка, устройство и способ обжига керамических изделий

Also Published As

Publication number Publication date
ITBO20010178A1 (it) 2002-09-26
ITBO20010178A0 (it) 2001-03-26

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