EP2713105A1 - Verbrennungskopf für Vormischgasbrenner und Brenner mit einem solchen Verbrennungskopf - Google Patents

Verbrennungskopf für Vormischgasbrenner und Brenner mit einem solchen Verbrennungskopf Download PDF

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Publication number
EP2713105A1
EP2713105A1 EP13186354.0A EP13186354A EP2713105A1 EP 2713105 A1 EP2713105 A1 EP 2713105A1 EP 13186354 A EP13186354 A EP 13186354A EP 2713105 A1 EP2713105 A1 EP 2713105A1
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EP
European Patent Office
Prior art keywords
combustion head
gas
wall
openings
conical
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.)
Granted
Application number
EP13186354.0A
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English (en)
French (fr)
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EP2713105B1 (de
Inventor
Oscar Pallaro
Federico Cortelazzo
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Systema Polska Sp zo o
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Systema Polska Sp zo o
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Priority to PL13186354T priority Critical patent/PL2713105T3/pl
Publication of EP2713105A1 publication Critical patent/EP2713105A1/de
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Publication of EP2713105B1 publication Critical patent/EP2713105B1/de
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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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F23D14/105—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head with injector axis parallel to the burner head axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/106—Assemblies of different layers

Definitions

  • the present invention regards a gas combustion head for premixed burners and a burner provided with the aforesaid combustion head, according to the preamble of the respective independent claims.
  • the present combustion head and the burner are of the type adapted to be advantageously employed for obtaining thermodynamic appliances, in particular for heating, adapted to generate heat through a flow of burnt gases to be employed in exchangers for the production of athermal energy.
  • premixed burners In order to increase the performances of heat generators fed with fuel gas, whether they are intended to produce hot air, hot water or vapor, the use of premixed burners has been increasingly employed, characterized by having a premixing between the comburent air and the fuel gas upstream of the combustion area.
  • a particular feature of said burners is that they are able to ensure an optimal combustion over a wide range of thermal power, and they also allow the reduction of the size of the combustion chambers.
  • Premixed burners have been on the market for years and mainly have application on hot air generators and on hot water boilers.
  • the thermal power of the single burner usually does not on average exceed several hundred kilowatts; this is linked to the technical characteristics of the combustion heads currently employed on said premixed burners.
  • the continuous adjustment range of the thermal power of the aforesaid burners with current combustion heads is also limited; it is not easy and sometimes impossible to remove or only reduce the frequent noise and vibration phenomena that arise, and the adjustment as well is not simple.
  • the current combustion heads employed on premixed burners fully condition the geometry of the combustion chamber, requiring the use of only one specific type thereof.
  • a typical case is that reported in the invention EP 1 538 395 A1 , where the combustion head reported herein develops a combustion flame that is totally radial, mainly adapted for hot water boilers, or in any case for apparatuses that do not provide for a combustion chamber "with flame inversion". Also the duration of current combustion heads in high thermal power applications, due to the high surface temperature of the head itself, is limited and much shorter than the average useful lifetime of the apparatus.
  • a burner provided with a plurality of combustion heads for the air-gas mixture, formed by pairs of walls converging together and flanked to form contiguous channels with longitudinal extension.
  • the walls are provided with a plurality of openings for the passage of the air-gas fluid.
  • Such solution has proven to be spatially bulky given the same power burned and unsuitable for creating a flame conformation capable of obtaining an optimized flow of hot gases, in particular for a combustion chamber of flame inversion type.
  • the flame that is formed in these combustion heads has main extension parallel to the longitudinal extension of the channels and is not directed in the extension direction of the hot gases.
  • the patent JP S62196517 describes a burner having a combustion head with a pair of walls entirely similar to those described above.
  • burners provided with one or more combustion heads with conical form provided with a main opening centrally obtained on the bottom of the cone, and fed by a main duct with air-gas mixture.
  • the main opening is surrounded by a plurality of secondary openings fed with the same mixture. From the main opening, a main flow exits with high speed and high flow rate, while from the secondary openings a plurality of minor flows exit with smaller flow rate, much less than that of the main opening; the main purpose of such minor flows is to stabilize the flame created by the main duct.
  • the secondary and main feed ducts are made in a body shaped in a distinct manner.
  • the main object of the present invention is to overcome the already known drawbacks of the prior art that are mentioned above, by presenting a combustion head for premixed burners which can separately burn even more than 500 kilowatts and which has a continuously variable adjustment range approximately from 5 to 100% of the thermal power, without noise and especially resonance problems. Indeed, due to the particular convexity of the conical surface for the outflow of the fuel gas - air mixture, one is able to exploit the self-feeding effect and obtain a stable flame in the various burnt thermal flow conditions, with all types of fuel gas.
  • Further object of the present invention is to present a burner whose combustion head is particularly adapted for its combustion chamber of "flame inversion" type.
  • the longitudinal stability of the flame due to the particular convexity of the conical surface for the distribution of the fuel gas - air mixture, in fact allows the possibility of also using cylindrical combustion chambers in which the flame inversion is obtained in the combustion chamber itself, overall optimizing the heat exchange surfaces and the exhaust of the combustion products.
  • Further object of the present invention is to present a combustion head for premixed burners which has a long duration and which diverges from the classical so-called "radiating heads" more or less coated with metallic or ceramic materials. Indeed, due to the particular convexity of the conical surface for feeding the fuel gas - air mixture present in the combustion head of the invention, the development and the conformation of the flame are such to not heat the body of the combustion head itself, ensuring greater stability and duration over time.
  • reference number (10) indicates the gas combustion head for premixed burners in its entirety.
  • the main body (11) adapted to receive a fuel gas - air mixture (15), which is provided with an internal distribution chamber (14) for the fuel gas - air mixture (15) and with at least one distribution wall (12).
  • the latter is provided with a series of openings (13), through which the fuel gas - air mixture (15) coming from the distribution chamber (14) flows.
  • the distribution wall (12) of the main body (11) has conical shape with sections substantially circular with respect to planes orthogonal to the central axis (Z) of the cone and with convexity directed towards the internal distribution chamber (14).
  • Such distribution wall (12) is formed by at least one sheet-shaped metal plate with the aforesaid plurality of openings (13) obtained in its thickness.
  • the latter (13) have size substantially equal to each other, and are traversed, orthogonally to the conical surface of said sheet-like plate in directions (Y) tilted towards the central axis (Z) of the cone, by flows of air-gas mixture with substantially equal flow speeds and susceptible of generating flames inside the combustion chamber (16) that are substantially equal and symmetrically arranged around the central axis (Z) of the cone as well as converging towards such central axis (Z) so as to form together a flow of hot burnt gases with maximum flow rate at the central axis (Z) of the cone.
  • the aforesaid combustion head (10) delimits a combustion area (16) outside said main body (11) where the igniting of the fuel gas - air mixture occurs and where the flame (17) is formed, with extension along the longitudinal axis (18) of a combustion chamber (19), in particular coinciding with the central axis of the cone (Z) of the head (12).
  • the sheet-shaped plate can be advantageously made in net form.
  • a combustion chamber with "flame inversion" (19) is indicated, the gas combustion head for premixed burners (10) being coupled to such chamber.
  • the main body (11) receives, in the distribution chamber (14), a fuel gas - air mixture (15) that is premixed in a system upstream of the body itself.
  • the internal distribution chamber (14) thus has a fuel gas - air mixture (15) that is pressurized with respect to the combustion area (16).
  • a flow of air-gas mixture then exits, which is ignited by means of an ignition device (not reported), immediately in the area enclosed by the conical surface (12) identified as the combustion area (16).
  • the single flows that exit from the openings (13) are extended in directions (Y) that are tilted with respect to the central symmetry axis (Z) of the cone.
  • the shape of the surface (12) can assume various configurations, advantageously including a frustoconical shape.
  • the conical wall (12) comprises two conical plates, each provided with a plurality of openings, parallel and spaced from each other along the extension of the longitudinal axis (18).
  • the size of the openings (13) is usually the same in the extension of the conical shape along the longitudinal axis.
  • the flow rate of the air-gas mixture through each single opening (13) is proportional to its passage section and to the pressure present in the distribution chamber (14).
  • the size of the openings (13) can be varied in the extension of the conical shape along the longitudinal axis.
  • the sections of the plurality of openings (13) of the conical wall (12), for the passage of the fuel gas - air mixture (15), are organized on circumferences of the conical wall (12) that are spaced from each other with variable pitch along the direction of the longitudinal axis (18).
  • the degree of conicity of the surface (12) can be varied.
  • the gas combustion head (10) for premixed burners is coupled to a combustion chamber with "flame inversion" (19).
  • the flame (17) is developed and propagated in the direction of the bottom wall (21) of the combustion chamber (19), such wall being opposite the base wall (23) where the combustion head (10) is mounted.
  • the combustion products (20) arrive in proximity to this wall (21), they reverse direction by 180° in order to be introduced downstream in the flue gas exchanger system, through at least one exhaust section (22) placed in proximity to the starting front of the flame (17) i.e. to the base wall (23). More in detail, such exhaust section (22) can be obtained in the advantageously cylindrical lateral wall (24) that joins the bottom wall (21) to the base wall (23), at the latter, or it can be obtained directly with perimeter openings in the base wall (23).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP13186354.0A 2012-09-27 2013-09-27 Vormischbrenner mit Gasverbrennungskopf Active EP2713105B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13186354T PL2713105T3 (pl) 2012-09-27 2013-09-27 Palnik z wstępnym mieszaniem wyposażony w głowicę spalania gazu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000282A ITPD20120282A1 (it) 2012-09-27 2012-09-27 Testa di combustione a gas per bruciatori premiscelati

Publications (2)

Publication Number Publication Date
EP2713105A1 true EP2713105A1 (de) 2014-04-02
EP2713105B1 EP2713105B1 (de) 2017-04-12

Family

ID=47388576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13186354.0A Active EP2713105B1 (de) 2012-09-27 2013-09-27 Vormischbrenner mit Gasverbrennungskopf

Country Status (4)

Country Link
EP (1) EP2713105B1 (de)
IT (1) ITPD20120282A1 (de)
PL (1) PL2713105T3 (de)
RU (1) RU147854U1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2509492A (en) * 2012-12-19 2014-07-09 Worgas Burners Ltd A gas burner having a combustion surface formed by a sheet with plural apertures
DE102017102085A1 (de) 2017-02-02 2018-08-02 Max Weishaupt Gmbh Vormischverfahren, dieses verwendendes Verbrennungsverfahren sowie Vormischvorrichtung und damit versehener Brenner
WO2018217915A1 (en) * 2017-05-24 2018-11-29 Carrier Corporation Inward fired low nox premix burner
WO2018215241A1 (en) 2017-05-24 2018-11-29 Bekaert Combustion Technology B.V. Inwardly firing premix gas burner
WO2019165385A1 (en) * 2018-02-23 2019-08-29 Fulton Group N.A., Inc. Inward-firing premix fuel combustion burner
WO2019193025A1 (en) 2018-04-05 2019-10-10 Bekaert Combustion Technology B.V. Conical premix gas burner
WO2019207559A3 (en) * 2018-04-13 2019-12-26 Fulton Group N.A., Inc. Compact dual-fuel combustion system, and fluid heating system and packaged burner system including the same
WO2023028129A1 (en) * 2021-08-25 2023-03-02 Fulton Group N.A., Inc. Compact flat plate premix fuel combustion system, and fluid heating system and packaged burner system including the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20120282A1 (it) 2012-09-27 2014-03-28 Systema Polska Sp Zo O Testa di combustione a gas per bruciatori premiscelati

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121948A (en) 1935-05-11 1938-06-28 Western Electric Co Burner
JPS62196517A (ja) 1986-02-24 1987-08-29 Osaka Gas Co Ltd ガスバ−ナ
EP0579315A1 (de) 1992-07-07 1994-01-19 Ingenieursburo P.I. Produkt Innovatie B.V. Brenner
US5458484A (en) 1994-05-16 1995-10-17 Carrier Corporation Pre-mix flame type burner
US6129545A (en) 1996-11-26 2000-10-10 Schott Glaswerke Gas burner with pollution-reducing features
US20040096794A1 (en) * 2001-03-19 2004-05-20 Loevgren Hans Radiant tube gas burner
EP1538395A1 (de) 2003-12-05 2005-06-08 Riello S.p.a. Brennerkopf für einen Vormischbrenner
WO2008081271A2 (en) 2006-12-22 2008-07-10 Worgas - Bruciatori - S.R.L. Burner with diffuser resistant to high operating temperatures
US20090291402A1 (en) 2006-07-07 2009-11-26 Eun Seong Cho Flame structure of gas burner
ITPD20120282A1 (it) 2012-09-27 2014-03-28 Systema Polska Sp Zo O Testa di combustione a gas per bruciatori premiscelati

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121948A (en) 1935-05-11 1938-06-28 Western Electric Co Burner
JPS62196517A (ja) 1986-02-24 1987-08-29 Osaka Gas Co Ltd ガスバ−ナ
EP0579315A1 (de) 1992-07-07 1994-01-19 Ingenieursburo P.I. Produkt Innovatie B.V. Brenner
US5458484A (en) 1994-05-16 1995-10-17 Carrier Corporation Pre-mix flame type burner
US6129545A (en) 1996-11-26 2000-10-10 Schott Glaswerke Gas burner with pollution-reducing features
US20040096794A1 (en) * 2001-03-19 2004-05-20 Loevgren Hans Radiant tube gas burner
EP1538395A1 (de) 2003-12-05 2005-06-08 Riello S.p.a. Brennerkopf für einen Vormischbrenner
US20090291402A1 (en) 2006-07-07 2009-11-26 Eun Seong Cho Flame structure of gas burner
WO2008081271A2 (en) 2006-12-22 2008-07-10 Worgas - Bruciatori - S.R.L. Burner with diffuser resistant to high operating temperatures
ITPD20120282A1 (it) 2012-09-27 2014-03-28 Systema Polska Sp Zo O Testa di combustione a gas per bruciatori premiscelati

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2509492A (en) * 2012-12-19 2014-07-09 Worgas Burners Ltd A gas burner having a combustion surface formed by a sheet with plural apertures
US9587826B2 (en) 2012-12-19 2017-03-07 Worgas Burners, Limited, A British Company Gas burner
DE102017102085A1 (de) 2017-02-02 2018-08-02 Max Weishaupt Gmbh Vormischverfahren, dieses verwendendes Verbrennungsverfahren sowie Vormischvorrichtung und damit versehener Brenner
WO2018141647A1 (de) 2017-02-02 2018-08-09 Max Weishaupt Gmbh Vormischverfahren, dieses verwendendes verbrennungsverfahren sowie vormischvorrichtung und damit versehener brenner
CN110621934A (zh) * 2017-05-24 2019-12-27 贝卡尔特燃烧技术股份有限公司 内部点火预混合气体燃烧器
WO2018215241A1 (en) 2017-05-24 2018-11-29 Bekaert Combustion Technology B.V. Inwardly firing premix gas burner
WO2018217915A1 (en) * 2017-05-24 2018-11-29 Carrier Corporation Inward fired low nox premix burner
US11215366B2 (en) 2017-05-24 2022-01-04 Bekaert Combustion Technology B.V. Inwardly firing premix gas burner
WO2019165385A1 (en) * 2018-02-23 2019-08-29 Fulton Group N.A., Inc. Inward-firing premix fuel combustion burner
US10989406B2 (en) 2018-02-23 2021-04-27 Fulton Group N.A., Inc. Compact inward-firing premix fuel combustion system, and fluid heating system and packaged burner system including the same
WO2019193025A1 (en) 2018-04-05 2019-10-10 Bekaert Combustion Technology B.V. Conical premix gas burner
WO2019207559A3 (en) * 2018-04-13 2019-12-26 Fulton Group N.A., Inc. Compact dual-fuel combustion system, and fluid heating system and packaged burner system including the same
WO2023028129A1 (en) * 2021-08-25 2023-03-02 Fulton Group N.A., Inc. Compact flat plate premix fuel combustion system, and fluid heating system and packaged burner system including the same

Also Published As

Publication number Publication date
PL2713105T3 (pl) 2017-10-31
ITPD20120282A1 (it) 2014-03-28
EP2713105B1 (de) 2017-04-12
RU147854U1 (ru) 2014-11-20

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