EP0386732A2 - Dispositif de combustion pour brûleur à deux combustibles - Google Patents

Dispositif de combustion pour brûleur à deux combustibles Download PDF

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Publication number
EP0386732A2
EP0386732A2 EP90104351A EP90104351A EP0386732A2 EP 0386732 A2 EP0386732 A2 EP 0386732A2 EP 90104351 A EP90104351 A EP 90104351A EP 90104351 A EP90104351 A EP 90104351A EP 0386732 A2 EP0386732 A2 EP 0386732A2
Authority
EP
European Patent Office
Prior art keywords
nozzles
nozzle plate
nozzle
gas
tube
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
EP90104351A
Other languages
German (de)
English (en)
Other versions
EP0386732B1 (fr
EP0386732A3 (fr
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.)
Oertli Warmetechnik AG
Original Assignee
Oertli Warmetechnik AG
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 Oertli Warmetechnik AG filed Critical Oertli Warmetechnik AG
Publication of EP0386732A2 publication Critical patent/EP0386732A2/fr
Publication of EP0386732A3 publication Critical patent/EP0386732A3/fr
Application granted granted Critical
Publication of EP0386732B1 publication Critical patent/EP0386732B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • 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
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; Burner heads
    • 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 conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel

Definitions

  • the present invention relates to a combustion device for a dual-fuel burner, which device comprises a supply duct for compressed combustion air, a nozzle plate with nozzles for dividing the combustion air flow into a plurality of partial air flows, a centrally arranged fuel supply device for liquid and / or gaseous fuels, the fuel supply device having an oil supply lance has an atomizer nozzle attached to the end face thereof and a gas feed lance arranged coaxially to the oil feed lance with a gas guide chamber arranged on the front, and having a flame tube arranged at a distance in front of the nozzle plate.
  • Burners for liquid and / or gaseous fuels with a central fuel supply and an annular space for supplying the combustion air are known.
  • the invention is based on the object of developing the known burners in such a way that good flame stability is ensured during their operation and the NO x content in the flue gas is considerably reduced.
  • the advantages of the present invention are essentially to be seen in the fact that the device does not have any fixed installations for holding the flame and the flame root lies clearly within the flame tube and that the pressure loss can be kept low without these fittings and therefore the amount of flue gas recirculation increases. As a result, the O2 partial pressure in the flue gas / air mixture is reduced, which results in a lower flame temperature and little NO X in the flue gas.
  • a pipe is arranged at a distance in front of the nozzle plate, so that a second opening for the flue gas recirculation is formed.
  • the tube encloses the second nozzles of the inner tube ring and the gas routing chamber and protrudes beyond the mouths of the second nozzle and the front of the gas guide chamber and into the flame tube.
  • the main advantages of this are that the flame can be stabilized during the start phase, that contamination caused by oil residues in the vacuum area of the flame tube can be prevented and that separate partial streams formed from recirculated flue gas and combustion air can be generated.
  • FIG. 1 shows only part of a preferred embodiment of a combustion device which is designed as an assembly and is mounted in a boiler 1.
  • the combustion device has a tubular feed channel 2 for pressurized combustion air, a nozzle plate 3, which closes off the feed channel 2, a fuel feed device 4, which is arranged centrally through the feed channel 2 and is led out of the nozzle plate 3 and in Flame tube 5, which is arranged at a distance in front of the nozzle plate 3, so that a first opening 6 is formed for the flue gas recirculation.
  • a pipe 7 is provided downstream of the nozzle plate 3, which is arranged at a distance in front of the nozzle plate 3, so that a second opening 8 is formed for the flue gas recirculation.
  • the nozzle plate 3 is provided with first and second nozzles 9, 10, which are arranged in an outer and inner nozzle ring 11, 12 (FIG. 2).
  • the nozzles 9, 10 are tubular. They have different clear widths and can be of different lengths.
  • first and second nozzles 9, 10 advantageously have a certain length / diameter ratio, e.g. in the range from 3: 1 to 5: 1.
  • the nozzles 9 of the outer nozzle ring 11 are arranged inclined outwards with respect to the axis of the feed channel 2, while the nozzles 10 of the inner nozzle ring 12 are arranged parallel to the axis of the feed channel 2.
  • the centrally arranged fuel supply device 4 contains an oil supply lance 14 known per se with an atomizing nozzle 15 and a gas supply lance 16 which is designed as a double jacket tube and has a gas guide chamber 17 on the front.
  • the oil supply lance 14 is arranged within the gas supply lance 16 such that the mouth of the atomizing nozzle 15 is approximately flush with the end face of the gas guide chamber 17.
  • the gas guide chamber 17 is cylindrical and has a plurality of gas outlet holes 18 which are formed lying on a circular line in the outer jacket.
  • the assignment of the first and second nozzles 9, 10 to one another and the gas outlet holes 18 to the nozzles represents an essential condition for the function of the device.
  • the second nozzles 10 of the inner nozzle ring 11 is arranged in a gap with respect to the first nozzles 9 of the outer nozzle ring 11 and the gas outlet holes 18 are in turn arranged in a gap with respect to the second nozzles 10 of the inner nozzle ring 12.
  • the gas discharge holes 18 are arranged at a distance from the front surface of the nozzle plate 3 so that the mouth thereof is set back with respect to the plane determined by the mouths of the second nozzles 10.
  • the gas outlet holes 18 are set back by the dimension of their diameter. It is pointed out that the total outlet holes 18 can also be arranged offset with respect to the plane mentioned.
  • the tube 7 is designed such that it surrounds the second nozzles 10 and the gas guide chamber 17 and protrudes beyond the mouths of the second nozzles 10 and the end face of the gas guide chamber 17 into the flame tube 5.
  • the recirculating flue gas is divided into two flue gas streams and the combustion air into two air streams through the tube 7, so that two separate streams of a mixture of flue gas and combustion air flow into the flame tube 5.
  • the mixture flowing out of the tube 7 contains the gas.
  • the flame tube 5 and the tube 7 are adjustably mounted with respect to the nozzle plate 3. Holders, not shown, are provided for this purpose. Using this holder, the recirculated flue gas amount for the flame tube 5 and the tube 7 can be set so that different amounts of gas flow into the opening 6 or 8, as shown for example by the arrows I and II in FIG.
  • the openings 6 and 8 can also be adapted to the type of fuel. In the exemplary embodiment described, it is advantageous if opening 6 is reduced to 60-80% of the cross section for oil operation for gas operation.
  • the nozzles can also be designed as in Figures 3 and 4, i.e. have a conical shape with an enlarged or narrowed mouth opening.
  • the first and second nozzles 9, 10 can also have a corrugated outer surface, as shown in FIGS. 5 and 6.
  • FIGS. 5 and 6 show embodiments of the flame tube, the shapes of which, as already mentioned, can also be used with the nozzles 9 and 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
EP90104351A 1989-03-10 1990-03-07 Dispositif de combustion pour brûleur à deux combustibles Expired - Lifetime EP0386732B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH904/89 1989-03-10
CH904/89A CH678100A5 (fr) 1989-03-10 1989-03-10

Publications (3)

Publication Number Publication Date
EP0386732A2 true EP0386732A2 (fr) 1990-09-12
EP0386732A3 EP0386732A3 (fr) 1991-05-15
EP0386732B1 EP0386732B1 (fr) 1994-08-31

Family

ID=4197885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104351A Expired - Lifetime EP0386732B1 (fr) 1989-03-10 1990-03-07 Dispositif de combustion pour brûleur à deux combustibles

Country Status (4)

Country Link
EP (1) EP0386732B1 (fr)
AT (1) ATE110837T1 (fr)
CH (1) CH678100A5 (fr)
DE (1) DE59006932D1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113412A1 (de) * 1991-04-20 1992-10-22 Saacke Gmbh & Co Kg Verbrennungsvorrichtung und verfahren zum betreiben einer feuerungsanlage mit interner rauchgasrezirkulation zur no(pfeil abwaerts)x(pfeil abwaerts)-reduktion
EP0751351A1 (fr) * 1995-06-26 1997-01-02 Abb Research Ltd. Chambre de combustion
EP0757205A2 (fr) * 1995-08-04 1997-02-05 Air Products And Chemicals, Inc. Procédé et appareil pour réduire la production de NOx pendant la combustion d'air, oxygène et combustible
EP0809070A1 (fr) * 1996-05-19 1997-11-26 Oertli Thermique (Société Anonyme) Brûleur avec recirculation des gaz d'échappement
EP0978685A1 (fr) * 1998-08-07 2000-02-09 Entreprise Generale De Chauffage Industriel Pillard Perfectionnements aux brûleurs à recirculation de fumées et à faible émission d'oxydes d'azote
AT406795B (de) * 1997-12-15 2000-09-25 Schwarz A & Co Brenner für gas- und ölheizungskessel
FR2800844A1 (fr) * 1999-11-08 2001-05-11 Muller Et Cie Dispositif pour ameliorer la combustion d'un bruleur a fioul a air pulse
EP1279895A1 (fr) * 2001-07-25 2003-01-29 Compagnie Europeenne de Bruleurs Tête de combustion d'un brûleur comprenant une zone de pré-vaporisation du combustible liquide
CN105698174A (zh) * 2016-04-11 2016-06-22 徐州科融环境资源股份有限公司 一种燃气用低氮燃烧器
IT201900006424A1 (it) * 2019-04-29 2020-10-29 Stefano Pesce Testa di combustione con ricircolazione interna e bruciatore comprendente la stessa
EP4008955A1 (fr) * 2020-12-03 2022-06-08 WS-Wärmeprozesstechnik GmbH Dispositif et procédé d'alimentation en air de combustion et de récirculation des gaz d'échappement pour un brûleur
IT202100023477A1 (it) 2021-09-10 2023-03-10 Shanghai Quanjie Envir Equip Co Ltd Testa di combustione con ricircolazione interna e bruciatore comprendente la stessa

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139085A1 (fr) * 1983-07-30 1985-05-02 Deutsche Babcock Werke Aktiengesellschaft Procédé et brûleur pour la combustion des combustibles liquides ou gazeux avec diminution de la formation de NOx
WO1986007434A1 (fr) * 1985-06-04 1986-12-18 Mueller Rudolf Bruleur pour chaudiere a combustible liquide avec circuit de recyclage des gaz de combustion

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139085A1 (fr) * 1983-07-30 1985-05-02 Deutsche Babcock Werke Aktiengesellschaft Procédé et brûleur pour la combustion des combustibles liquides ou gazeux avec diminution de la formation de NOx
WO1986007434A1 (fr) * 1985-06-04 1986-12-18 Mueller Rudolf Bruleur pour chaudiere a combustible liquide avec circuit de recyclage des gaz de combustion

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113412A1 (de) * 1991-04-20 1992-10-22 Saacke Gmbh & Co Kg Verbrennungsvorrichtung und verfahren zum betreiben einer feuerungsanlage mit interner rauchgasrezirkulation zur no(pfeil abwaerts)x(pfeil abwaerts)-reduktion
DE4113412C2 (de) * 1991-04-20 1999-04-01 Saacke Gmbh & Co Kg Vorrichtung zur Verbrennung von flüssigem oder gasförmigem Brennstoff für eine Feuerungsanlage
EP0751351A1 (fr) * 1995-06-26 1997-01-02 Abb Research Ltd. Chambre de combustion
EP0757205A2 (fr) * 1995-08-04 1997-02-05 Air Products And Chemicals, Inc. Procédé et appareil pour réduire la production de NOx pendant la combustion d'air, oxygène et combustible
EP0757205A3 (fr) * 1995-08-04 1999-01-07 Air Products And Chemicals, Inc. Procédé et appareil pour réduire la production de NOx pendant la combustion d'air, oxygène et combustible
EP0809070A1 (fr) * 1996-05-19 1997-11-26 Oertli Thermique (Société Anonyme) Brûleur avec recirculation des gaz d'échappement
AT406795B (de) * 1997-12-15 2000-09-25 Schwarz A & Co Brenner für gas- und ölheizungskessel
FR2782150A1 (fr) * 1998-08-07 2000-02-11 Pillard Chauffage Perfectionnements aux bruleurs a recirculation de fumees et a faible emission d'oxydes d'azote
EP0978685A1 (fr) * 1998-08-07 2000-02-09 Entreprise Generale De Chauffage Industriel Pillard Perfectionnements aux brûleurs à recirculation de fumées et à faible émission d'oxydes d'azote
FR2800844A1 (fr) * 1999-11-08 2001-05-11 Muller Et Cie Dispositif pour ameliorer la combustion d'un bruleur a fioul a air pulse
EP1279895A1 (fr) * 2001-07-25 2003-01-29 Compagnie Europeenne de Bruleurs Tête de combustion d'un brûleur comprenant une zone de pré-vaporisation du combustible liquide
CN105698174A (zh) * 2016-04-11 2016-06-22 徐州科融环境资源股份有限公司 一种燃气用低氮燃烧器
CN105698174B (zh) * 2016-04-11 2018-07-17 徐州科融环境资源股份有限公司 一种燃气用低氮燃烧器
IT201900006424A1 (it) * 2019-04-29 2020-10-29 Stefano Pesce Testa di combustione con ricircolazione interna e bruciatore comprendente la stessa
EP3734154A1 (fr) * 2019-04-29 2020-11-04 Shanghai Quanjie Envir Co,. Ltd. Tête de brûleur à recirculation interne
EP4008955A1 (fr) * 2020-12-03 2022-06-08 WS-Wärmeprozesstechnik GmbH Dispositif et procédé d'alimentation en air de combustion et de récirculation des gaz d'échappement pour un brûleur
WO2022117345A1 (fr) * 2020-12-03 2022-06-09 WS - Wärmeprozesstechnik GmbH Dispositif et procédé d'alimentation en air de combustion et de recirculation de gaz d'échappement pour un brûleur
IT202100023477A1 (it) 2021-09-10 2023-03-10 Shanghai Quanjie Envir Equip Co Ltd Testa di combustione con ricircolazione interna e bruciatore comprendente la stessa

Also Published As

Publication number Publication date
CH678100A5 (fr) 1991-07-31
EP0386732B1 (fr) 1994-08-31
ATE110837T1 (de) 1994-09-15
DE59006932D1 (de) 1994-10-06
EP0386732A3 (fr) 1991-05-15

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