EP0386732B1 - Verbrennungseinrichtung für einen Zweistoffbrenner - Google Patents

Verbrennungseinrichtung für einen Zweistoffbrenner Download PDF

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Publication number
EP0386732B1
EP0386732B1 EP90104351A EP90104351A EP0386732B1 EP 0386732 B1 EP0386732 B1 EP 0386732B1 EP 90104351 A EP90104351 A EP 90104351A EP 90104351 A EP90104351 A EP 90104351A EP 0386732 B1 EP0386732 B1 EP 0386732B1
Authority
EP
European Patent Office
Prior art keywords
nozzles
gas
nozzle plate
nozzle
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.)
Expired - Lifetime
Application number
EP90104351A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0386732A3 (de
EP0386732A2 (de
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/de
Publication of EP0386732A3 publication Critical patent/EP0386732A3/de
Application granted granted Critical
Publication of EP0386732B1 publication Critical patent/EP0386732B1/de
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
    • F23D11/40—Mixing tubes; 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 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

Definitions

  • the invention relates to a combustion device according to the preamble of claim 1.
  • a combustion device according to the preamble of claim 1.
  • Such a device thus serves for a two-fuel burner, i.e. it can run on two different fuels, either a gas or a liquid fuel.
  • Such a device according to the preamble of claim 1 is known from EP-A-0 139 085.
  • the entire combustion air flows through a guide tube which connects to an air guide tube.
  • the fuel gas or liquid
  • the combustible mixture then enters a flame tube.
  • the invention is based on the object of developing this known device in such a way that good flame stability is ensured during its operation and the NO x content in the flue gas is considerably reduced.
  • the combustion air is now divided into a plurality of partial air streams on a nozzle plate and, furthermore, the guide tube no longer connects to the air guide tube, but stands at a distance from it.
  • a number of the partial air flows will now be in the Guide tube directed and the rest of the partial air flows into the flame tube, so that two radially lying flue gas flows result in their circulation.
  • the advantages of the present invention can be seen essentially in the fact that the device does not have any fixed installations for holding the flame and that the flame root is clearly within the flame tube and that the pressure loss can be kept low without these installations and therefore the flue gas recirculation quantity increases.
  • 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.
  • the flame can be stabilized during the starting phase and contamination caused by oil residues in the vacuum area of the flame tube can be prevented.
  • a combustion device is known from WO-A-8 607 434 which only works with liquid fuel.
  • a guide tube that connects directly to a nozzle plate for the combustion air without any space. This direct connection of the guide tube to the nozzle plate means that no additional flue gas flow can circulate between the nozzle plate and the guide tube.
  • 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 a known oil supply lance 14 with an atomizing nozzle 15 and a gas supply lance 16, which is designed as a double-walled 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 atomizer 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 12 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 in relation to the plane mentioned.
  • the nozzles 9, 10 can also be designed as in FIGS. 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 5, 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 Verbrennungseinrichtung für einen Zweistoffbrenner Expired - Lifetime EP0386732B1 (de)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=4197885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104351A Expired - Lifetime EP0386732B1 (de) 1989-03-10 1990-03-07 Verbrennungseinrichtung für einen Zweistoffbrenner

Country Status (4)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4008955B1 (de) * 2020-12-03 2024-06-12 WS-Wärmeprozesstechnik GmbH Vorrichtung und verfahren zur verbrennungsluftzufuhr und abgasrezirkulation für einen brenner

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113412C2 (de) * 1991-04-20 1999-04-01 Saacke Gmbh & Co Kg Vorrichtung zur Verbrennung von flüssigem oder gasförmigem Brennstoff für eine Feuerungsanlage
DE19523094A1 (de) * 1995-06-26 1997-01-02 Abb Management Ag Brennkammer
US5611683A (en) * 1995-08-04 1997-03-18 Air Products And Chemicals, Inc. Method and apparatus for reducing NOX production during air-oxygen-fuel combustion
EP0809070B1 (de) * 1996-05-19 2001-08-29 Oertli Thermique (Société Anonyme) Brenner mit Abgasrückführung
AT406795B (de) * 1997-12-15 2000-09-25 Schwarz A & Co Brenner für gas- und ölheizungskessel
FR2782150B1 (fr) * 1998-08-07 2000-11-10 Pillard Chauffage Perfectionnements aux bruleurs a recirculation de fumees et a faible emission d'oxydes d'azote
FR2800844B1 (fr) * 1999-11-08 2002-04-19 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
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
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327597A1 (de) * 1983-07-30 1985-02-07 Deutsche Babcock Werke AG, 4200 Oberhausen Verfahren und brenner zum verbrennen von fluessigen oder gasfoermigen brennstoffen unter verminderter bildung von nox
FR2582781A1 (fr) * 1985-06-04 1986-12-05 Mueller Rudolf Bruleur pour chaudiere a combustion liquide avec circuit de recyclage des gaz de combustion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4008955B1 (de) * 2020-12-03 2024-06-12 WS-Wärmeprozesstechnik GmbH Vorrichtung und verfahren zur verbrennungsluftzufuhr und abgasrezirkulation für einen brenner

Also Published As

Publication number Publication date
CH678100A5 (enrdf_load_stackoverflow) 1991-07-31
ATE110837T1 (de) 1994-09-15
EP0386732A3 (de) 1991-05-15
DE59006932D1 (de) 1994-10-06
EP0386732A2 (de) 1990-09-12

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