EP0864812A2 - Dispositif de mélange pour brûleur à gaz et à huile - Google Patents

Dispositif de mélange pour brûleur à gaz et à huile Download PDF

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Publication number
EP0864812A2
EP0864812A2 EP98104380A EP98104380A EP0864812A2 EP 0864812 A2 EP0864812 A2 EP 0864812A2 EP 98104380 A EP98104380 A EP 98104380A EP 98104380 A EP98104380 A EP 98104380A EP 0864812 A2 EP0864812 A2 EP 0864812A2
Authority
EP
European Patent Office
Prior art keywords
mixing device
tube
nozzle
secondary air
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Withdrawn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
EP98104380A
Other languages
German (de)
English (en)
Other versions
EP0864812A3 (fr
Inventor
Alois STÖCKL
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.)
A Schwarz and Co
Original Assignee
A Schwarz and Co
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
Priority claimed from AT42397A external-priority patent/AT406706B/de
Priority claimed from AT211097A external-priority patent/AT406795B/de
Application filed by A Schwarz and Co filed Critical A Schwarz and Co
Publication of EP0864812A2 publication Critical patent/EP0864812A2/fr
Publication of EP0864812A3 publication Critical patent/EP0864812A3/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Withdrawn legal-status Critical Current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
    • 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
    • F23D14/24—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 at least one of the fluids being submitted to a swirling motion
    • 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
    • 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
    • F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
    • 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/30—Premixing fluegas with combustion air
    • 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/50—Control of recirculation rate
    • 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 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/09002—Specific devices inducing or forcing flue gas recirculation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2208/00—Control devices associated with burners
    • F23D2208/10—Sensing devices

Definitions

  • the invention relates to a mixing device for gas and oil burners with a Burner tube with an end opening and a located therein front area frusto-conical inner tube, in which a coaxial nozzle tube with a Fuel supply, for example a pressure atomizing nozzle and a swirl generator is arranged, one in the burning direction in front of the pressure atomizing nozzle Ignition electrode is located.
  • a fuel supply for example a pressure atomizing nozzle and a swirl generator
  • Drastically tightened pollutant emission limit values in the air pollution control regulations in more and more countries are calling for burners with extremely low NOx emissions.
  • due to the highly thermally insulated building there is particularly Single-family houses the demand for low heating output of the burner.
  • the targeted low NOx values cannot be achieved with a burner with a yellow flame can be achieved. There has therefore been an effort to burners for a long time create that burn at least partially with a blue flame.
  • the object of the invention is to close a burner of the type mentioned improve that a reduced NOx emission is achieved without problems. Furthermore should continuous operation with low heating power is possible with the burner according to the invention be.
  • the object of the invention is achieved in that all three tubes, at least have a rear air inlet opening and at least one front outlet opening, from Air flows through that another between the nozzle tube and the inner tube Swirl generator is arranged, the swirl disturbances in the nozzle tube and in the inner tube are supercritical and run in the same direction of rotation while the airflow between the inner tube and the burner tube is guided without swirl.
  • the inventive design of the mixing device improves in particular Mixing of the flue gases with the secondary air is achieved.
  • An advantageous embodiment of the invention provides that at the front of the Burner tube protruding through the nozzle mouth of the fuel supply Secondary air tubes are arranged, which surround the inner tube in a ring and which are in a front project the recirculation pipe arranged on the burner pipe.
  • the mixing of the flue gases with the secondary air is in one embodiment of the Invention further improved in that in the recirculation pipe before the secondary air pipes a perforated annular disc is arranged. It is advantageously provided that the Number of holes in the disc is equal to the number of secondary air pipes and that the Align holes in the disc with the secondary air pipes.
  • Another embodiment of the invention provides that an ionization sensor in the burner tube with a porcelain base, which is through a hole in the front wall of the Burner tube protrudes, with the porcelain base resting entirely on the flame facing away from the end wall.
  • the mixing device has a cylindrical burner tube 1.
  • the pressure atomizing nozzle 5 is arranged in the center. Coaxial to the atomizer nozzle 5 and to the burner tube 1 are at the front end Pressure atomizer nozzle 5, a nozzle tube 7 and an inner tube 2 surrounding the nozzle tube 7 intended.
  • the inner tube 2 has a front frustoconical region 2 'and a rear cylindrical area 2 ''.
  • the nozzle tube 7 is frustoconical in shape Area 7 'and a rear cylindrical area 7' 'executed.
  • the Front frustoconical area 7 ' partially covers the pressure atomizing nozzle 5 at the front.
  • Both the inner tube 2 and the nozzle tube 7 are with a at their rear ends final wall 8, 9 provided.
  • the inner tube 2 has a front outlet opening 3 and the nozzle tube 7 has a front one Outlet opening 4 on.
  • the outlet openings 3, 4 are in the embodiment in one level, but with a tolerance limit of ⁇ 3 mm.
  • the burner tube 1 is provided with a flat end wall 6 at its front end.
  • the frustoconical sections 2 ', 7' of the inner tube 2 and the nozzle tube 7 protrude the burner tube 1 out.
  • Burner tube 1 is made in two parts, with one adjoining the end wall 6 Pipe attachment 1 'and an extension tube 1' '.
  • the pipe socket 1 ' is in the extension pipe 1 '' and thus its distance from the recirculation pipe 14 is adjustable.
  • the end wall 6 is circular arranged openings 10 for the supply of secondary air into the flame region 17th provided and in the embodiment of FIGS. 6 to 16 arranged in a circle Secondary air tubes 20.
  • the secondary air tubes 20 protrude into the recirculation tube 14.
  • the air supplied by it mixes with the recirculated flue gases 23 and brings this mixture up to the flame region 17.
  • the ends of the secondary air tubes 20 facing the flame region 17 differ be trained.
  • the secondary air tubes 20 are on their jacket each provided with a hole 31.
  • the holes 31 upstream from the Outlet openings 3, 4 are preferably located either towards the center of the Mixing device, i.e. aligned to the pressure atomizer nozzle 5 or in the direction of swirl.
  • a swirl generator is provided, which is inclined Air supply openings 12, for example bores or punch holes, is formed.
  • the cylindrical jacket of the nozzle tube 7 has oblique air supply openings 13 that perform the function of a swirl generator.
  • the air supply openings 12, 13 are located each in one plane and are formed obliquely to the radial axis of the tubes 2, 7.
  • Such Air supply openings 12, 13 are also referred to as tangential openings, although they are not on a tangent to the pipe jacket.
  • a recirculation pipe 14 is arranged in front of the burner pipe 1.
  • the recirculation pipe 14 is located directly in front of the outlet opening of the pressure atomizing nozzle 5 and has one Length that is no longer than half its diameter.
  • the diameter of the recirculation tube 14 is equal to or less than that Diameter of the burner tube 1.
  • annular disc 27 is arranged in front of the secondary air pipes 20 in Recirculation tube 14 an annular disc 27 is arranged.
  • the annular disc 27 has an inner opening 28 and openings 29 arranged in a ring each opening 29 in front of a secondary air tube 20.
  • the diameter of the openings 29 is slightly larger than the diameter of the secondary air pipes 20.
  • the holes 29 have a flanged edge 30. It however, it would also be possible to make the holes 29 with a smooth edge.
  • Disc 27 mixes the secondary air with the recirculated flue gases intensified again.
  • the cross sections of the air supply openings 12, 13 are selected so that the total cross section the air supply openings 12 are equal to the ring cross section of the outlet opening 3, during the ring cross section between the nozzle tube 7 and the pressure atomizing nozzle 5 the outlet opening 4 has an area which is half of the total cross section of the Air supply openings 13 corresponds.
  • the total cross section of the air supply openings 12 can however, also be larger than the ring cross section of the outlet opening 3 and Ring cross section between the pressure atomizing nozzle 5 and the nozzle tube 7 can be between 40 and 70% of the total cross section of the air supply openings 13 of the nozzle tube 7 are.
  • the inner tube 2 and Nozzle tube 7 Due to the design of the mixing device according to the invention, the inner tube 2 and Nozzle tube 7 generates a supercritical swirl. Due to the supercritical swirl the so-called vortex breakdown effect a strong backflow in the center 15. By the strong backflow will fuel back in the direction of the pressure atomizer nozzle 5 transported. That it is not contaminated by the oil and flue gas residues, is caused by the combustion air emerging from the nozzle tube 7 in a swirl configuration prevented.
  • the oil burner equipped with a mixing device according to the invention ignites with a Yellow flame in the area 16 immediately before the pressure atomizing nozzle 5 or Outlet openings 3, 4, with which the gasification of the fuel in fractions of one Initiated second and then maintained by the internal backflow of flame becomes. No additional external energy is used to initiate fuel gasification needed.
  • the gasification and mixing of the fuel with the combustion air and the hot flue gases are caused by the highly supercritical main swirl, the emerges from the inner tube 2 and which through the so-called vortex breakdown effect strong backflow of flame with an intensive mass transfer. Subsequently the flame burns blue in a pronounced edge region 17.
  • the pressure atomizing nozzle 5 is preferably provided with a preheating device for the flow through Light fuel oil.
  • the mixing device for a gas burner according to FIGS. 2 and 7 differs only through the nozzle 18, the gas not at the tip but via openings 19 emerges laterally into the cylindrical section of the nozzle tube 7.
  • the flame is monitored by an ionization sensor 24, the End protrudes into the flame area 17.
  • the ionization sensor 24 is supported in a conventional manner in a porcelain base 25. However, this porcelain base 25 is located entirely in the burner tube 1, the ionization sensor 24 projects through a hole 26 in the end wall 6 of the burner tube 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
EP98104380A 1997-03-12 1998-03-11 Dispositif de mélange pour brûleur à gaz et à huile Withdrawn EP0864812A3 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
AT42397A AT406706B (de) 1997-03-12 1997-03-12 Brenner für gas- und ölheizkessel
AT42397 1997-03-12
AT423/97 1997-03-12
AT211097 1997-12-15
AT2110/97 1997-12-15
AT211097A AT406795B (de) 1997-12-15 1997-12-15 Brenner für gas- und ölheizungskessel

Publications (2)

Publication Number Publication Date
EP0864812A2 true EP0864812A2 (fr) 1998-09-16
EP0864812A3 EP0864812A3 (fr) 1999-06-16

Family

ID=25592695

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104380A Withdrawn EP0864812A3 (fr) 1997-03-12 1998-03-11 Dispositif de mélange pour brûleur à gaz et à huile

Country Status (1)

Country Link
EP (1) EP0864812A3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000065281A1 (fr) * 1999-04-26 2000-11-02 Satronic Ag Dispositif de surveillance de flammes
AT408267B (de) * 1999-05-25 2001-10-25 Vaillant Gmbh Luftstufenbrenner
EP1533566A3 (fr) * 2003-11-18 2007-07-25 MEKU Metallverarbeitungs GmbH & Co. KG Dispositif de mélange pour brûleur
CN100368667C (zh) * 2006-04-13 2008-02-13 中国科学院工程热物理研究所 燃气轮机稀释扩散燃烧喷嘴
EP1898152A3 (fr) * 2006-09-07 2008-12-10 MEKU Metallverarbeitungs GmbH & Co. KG Unité de mélange pour un brûleur
CN103277795A (zh) * 2013-05-27 2013-09-04 中国科学院广州能源研究所 可调节烟气自身再循环燃气燃烧器
CN116877302A (zh) * 2018-11-22 2023-10-13 潍坊力创电子科技有限公司 气体发动机空气/燃气混合装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930569A1 (de) * 1989-09-13 1991-03-21 Siegfried W Schilling Mischeinrichtung fuer brenner

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2410141C3 (de) * 1974-03-02 1978-10-26 Sieber, Rolf, 7501 Karlsbad Brenner for fluide Brennstoffe
JPS5843643B2 (ja) * 1976-07-14 1983-09-28 大同特殊鋼株式会社 改良された燃焼ガス自己再循環式バ−ナ
JPS5359925A (en) * 1976-11-11 1978-05-30 Chugai Ro Kogyo Kaisha Ltd Nitric oxide reduction combustion method and device
DE2745488C2 (de) * 1977-10-10 1986-04-30 Bayer Ag, 5090 Leverkusen Verfahren und Vorrichtung zur Verbrennung explosibler Gase
DE3132948C2 (de) * 1981-08-20 1984-07-19 Kraft Hausherr GmbH & Co KG, 4322 Sprockhövel Brenneraustrittskopf für einen Brenner für flüssige Brennstoffe
DE3821526A1 (de) * 1988-06-25 1989-12-28 May Michael G Verfahren und einrichtung zur verbrennung von brennstoff
FR2648897A1 (fr) * 1989-06-22 1990-12-28 Mueller Rudolf Bruleur a flux torique-cyclonique pour chaudiere a combustible liquide et gazeux
DE4113412C2 (de) * 1991-04-20 1999-04-01 Saacke Gmbh & Co Kg Vorrichtung zur Verbrennung von flüssigem oder gasförmigem Brennstoff für eine Feuerungsanlage
AT400259B (de) * 1993-11-29 1995-11-27 Schwarz A & Co Mischeinrichtung für öl- oder gasbrenner
DE29618399U1 (de) * 1996-10-31 1997-01-09 Schilling, Siegfried W., Russikon Luftdüse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930569A1 (de) * 1989-09-13 1991-03-21 Siegfried W Schilling Mischeinrichtung fuer brenner

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000065281A1 (fr) * 1999-04-26 2000-11-02 Satronic Ag Dispositif de surveillance de flammes
AT408267B (de) * 1999-05-25 2001-10-25 Vaillant Gmbh Luftstufenbrenner
EP1533566A3 (fr) * 2003-11-18 2007-07-25 MEKU Metallverarbeitungs GmbH & Co. KG Dispositif de mélange pour brûleur
CN100368667C (zh) * 2006-04-13 2008-02-13 中国科学院工程热物理研究所 燃气轮机稀释扩散燃烧喷嘴
EP1898152A3 (fr) * 2006-09-07 2008-12-10 MEKU Metallverarbeitungs GmbH & Co. KG Unité de mélange pour un brûleur
CN103277795A (zh) * 2013-05-27 2013-09-04 中国科学院广州能源研究所 可调节烟气自身再循环燃气燃烧器
CN103277795B (zh) * 2013-05-27 2015-05-20 中国科学院广州能源研究所 可调节烟气自身再循环燃气燃烧器
CN116877302A (zh) * 2018-11-22 2023-10-13 潍坊力创电子科技有限公司 气体发动机空气/燃气混合装置

Also Published As

Publication number Publication date
EP0864812A3 (fr) 1999-06-16

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