EP0807787B1 - Brenner - Google Patents

Brenner Download PDF

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Publication number
EP0807787B1
EP0807787B1 EP97810221A EP97810221A EP0807787B1 EP 0807787 B1 EP0807787 B1 EP 0807787B1 EP 97810221 A EP97810221 A EP 97810221A EP 97810221 A EP97810221 A EP 97810221A EP 0807787 B1 EP0807787 B1 EP 0807787B1
Authority
EP
European Patent Office
Prior art keywords
burner
fuel
air
overlap angle
increases
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
EP97810221A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0807787A2 (de
EP0807787A3 (de
Inventor
Klaus Dr. Döbbeling
Hans Peter Knöpfel
Dieter Winkler
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.)
General Electric Switzerland GmbH
Original Assignee
Alstom Schweiz 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 Alstom Schweiz AG filed Critical Alstom Schweiz AG
Publication of EP0807787A2 publication Critical patent/EP0807787A2/de
Publication of EP0807787A3 publication Critical patent/EP0807787A3/de
Application granted granted Critical
Publication of EP0807787B1 publication Critical patent/EP0807787B1/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
    • 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
    • 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
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning 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 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/07002—Premix burners with air inlet slots obtained between offset curved wall surfaces, e.g. double cone burners

Definitions

  • the invention relates to the field of combustion technology. It concerns a double cone type burner, in which the combustion air flow before its inflow gaseous fuel is fed into the burner interior becomes.
  • EP 0 321 809 B1 describes the basic structure of a burner the double-cone design known to the invention refers.
  • This burner consists essentially of hollow, partial conical bodies that complement one another, with tangential air inlet slots and feeds for gaseous and liquid fuels where the central axes the hollow partial cone body is widening in the direction of flow Have a taper and in the longitudinal direction to each other run staggered.
  • In the part cone bodies formed conical interior is a fuel nozzle on the burner head placed.
  • the gaseous fuel becomes the combustion air flow prior to its inflow into the interior of the burner arranged along the entry slots Gas injectors supplied.
  • the formation of the fuel / air mixture thus happens directly at the end of the tangential air inlet slots.
  • the air entry level and the gas entry level (Perforation level) thus fall with this known one State of the art together.
  • the last gas injectors along the air inlet slots are very close to in this known prior art Burner outlet and therefore also near the flame.
  • the length of the pre-mixing section is therefore very high at these points in short so that the fuel coming from these is downstream last injector located is bad can mix with the air. Because of the bad premix of the fuel with air arise locally with a rich fuel / air mixture, which leads to higher flame temperatures and thus also leads to higher NOx values. Furthermore the additional load on the firing front is in these regions so high that they overheat and the material there is protected by an expensive zirconium coating must become.
  • a burning that corresponds to the preamble of claim 1 is known from EP 0 641 971 A2
  • the invention tries to avoid all of these disadvantages. It is based on the task of a double cone burner to create which is simply constructed and therefore is inexpensive to manufacture and in which an improved Premix the gaseous fuel from the downstream located last gas injection nozzles with the combustion air takes place, so that compared to the known prior art the NOx emissions are reduced and the burner front is thermally less stressed, so that expensive special coatings the burner front can be dispensed with.
  • this is achieved in that a burner according to the preamble of claim 1 the overlap angle in Flow direction of the burner increases and at the same time Increase in the overlap angle of the distance between the fuel injectors increases from the air inlet level into the burner. The fuel injection level and the air entry level fall therefore no longer together, but the fuel injection level changes position along the burner to the air inlet level.
  • the advantages of the invention include that in the area of the downstream fuel injectors Due to the increased premixing distance, the premixing of the gaseous fuel improved with the combustion air will, so the NOx emissions and the thermal load the burner front can be reduced.
  • the burner stands out due to a more stable flame position and less pulsations out.
  • the overlap angle in the cone tip is 0 ° and steady up to the burner front increases, the maximum overlap angle being 90 °.
  • FIG. 1 shows a perspective view of the inventive Burner.
  • FIG. 1 shows a perspective view of the inventive Burner.
  • the two partial cone bodies 1, 2 each have a cylindrical starting part 9, 10 which also run offset to each other, so that this too Area the tangential air inlet slots 5, 6 are present are.
  • In this cylindrical initial part 9, 10 is a nozzle 11 for atomizing the liquid fuel 12 accommodated.
  • the burner can also be used without the cylindrical Initial parts 9, 10 are designed so that it is purely conical is trained. Then the fuel nozzle 11 is directly in the Cone tip housed.
  • the two partial cone bodies 1, 2 each have a fuel line 13, 14 with openings 15 are provided, which represent fuel injectors.
  • the fuel injectors 15 make gaseous fuel 16 through the tangential air inlet slots 5, 6 flowing combustion
  • Combustion chamber side 17 has a burner as an anchor for the partial cone body 1, 2 serving front plate 18 with a Number of holes 19 through which, if necessary, dilution or cooling air 20 the front part of the combustion chamber 17th or whose wall can be fed.
  • liquid fuel 12 is used to operate the burner, so it flows through the nozzle 11 and is in one injected acute angle into the burner interior 17, wherein a homogeneous fuel spray is established.
  • the conical Liquid fuel profile 23 is of a tangentially flowing rotating combustion air flow 7 enclosed.
  • concentration of the liquid fuel becomes axial 12 continuously through the mixed combustion air 7 reduced.
  • the optimal fuel concentration over the Cross section is only in the area of the vertebral burst, i.e. reached in the area of the backflow zone 24.
  • the ignition takes place at the top of the backflow zone 24. Only at this point creates a stable flame front 25.
  • the flame stabilization results from an increase in the swirl number in the direction of flow along the cone axis. The flame strikes back now does not occur inside the burner.
  • the overlap two partial cone bodies 1, 2 partially, the overlap angle ⁇ in the cone tip is 0 ° (i.e. lies there no overlap before) and ⁇ then in the flow direction up to to the burner outlet, i.e. up to the front plate 18, increases continuously. 90 ° can be specified as the maximum overlap angle ⁇ become.
  • the fuel injectors 15 are further upstream.
  • the air inlet level 21 and the fuel injection level thus fall 22 no longer together.
  • the fuel injection level 22 changes direction along the double cone burner Burner front their position to air inlet level 21 so large that ever longer pre-mixing distances from the respective Fuel injection of the gaseous fuel 16 can be reached up to the air inlet level 21.
  • the flame compared to the previously known State of the art in which the partial cone bodies 1, 2 do not overlap and the fuel injection plane 22 of the Air inlet level 21 corresponds to a more stable position.
  • the inventive Brenner also is less prone to pulsation. It is constructive designed quite simply (e.g. without complicated Transition pieces to extend the premix section) and therefore inexpensive to manufacture.
  • inventive Solution can also be used for burners, which consist of more than two partial cone bodies, e.g. for so-called Four slot burner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP97810221A 1996-05-17 1997-04-14 Brenner Expired - Lifetime EP0807787B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19619873 1996-05-17
DE19619873A DE19619873A1 (de) 1996-05-17 1996-05-17 Brenner

Publications (3)

Publication Number Publication Date
EP0807787A2 EP0807787A2 (de) 1997-11-19
EP0807787A3 EP0807787A3 (de) 1999-03-24
EP0807787B1 true EP0807787B1 (de) 2003-05-28

Family

ID=7794546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810221A Expired - Lifetime EP0807787B1 (de) 1996-05-17 1997-04-14 Brenner

Country Status (5)

Country Link
US (1) US5921766A (ja)
EP (1) EP0807787B1 (ja)
JP (1) JP3863631B2 (ja)
CN (1) CN1117243C (ja)
DE (2) DE19619873A1 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE244380T1 (de) * 1997-11-21 2003-07-15 Alstom Brenner für den betrieb eines wärmeerzeugers
US6141954A (en) * 1998-05-18 2000-11-07 United Technologies Corporation Premixing fuel injector with improved flame disgorgement capacity
EP1262714A1 (de) * 2001-06-01 2002-12-04 ALSTOM (Switzerland) Ltd Brenner mit Abgasrückführung
DE10333671A1 (de) 2003-07-24 2005-08-04 Alstom Technology Ltd Verfahren zur Reduktion der Nox-Emissionen einer mehrere Brenner umfassenden Brenneranordnung sowie Brenneranordnung zur Durchführung des Verfahrens
US7097448B2 (en) * 2004-05-07 2006-08-29 Peter Chesney Vortex type gas lamp
US9170017B2 (en) 2010-01-06 2015-10-27 The Outdoor Greatroom Company LLLP Fire container assembly
US10281140B2 (en) 2014-07-15 2019-05-07 Chevron U.S.A. Inc. Low NOx combustion method and apparatus
US11852319B2 (en) * 2021-02-26 2023-12-26 Armando Parra Control means for vortex flame device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570471A (en) * 1969-02-14 1971-03-16 Thermo Electron Corp Radiant tube having uniform high-temperature distribution
EP0210462B1 (de) * 1985-07-30 1989-03-15 BBC Brown Boveri AG Dualbrenner
CH674561A5 (ja) * 1987-12-21 1990-06-15 Bbc Brown Boveri & Cie
DE59009353D1 (de) * 1990-10-17 1995-08-03 Asea Brown Boveri Brennkammer einer Gasturbine.
EP0548396B1 (de) * 1991-12-23 1995-02-22 Asea Brown Boveri Ag Vorrichtung für die Vermischung zweier gasförmiger Komponenten und Brenner, in welchem diese Vorrichtung eingesetzt wird
US5307634A (en) * 1992-02-26 1994-05-03 United Technologies Corporation Premix gas nozzle
DE4304213A1 (de) * 1993-02-12 1994-08-18 Abb Research Ltd Brenner zum Betrieb einer Brennkraftmaschine, einer Brennkammer einer Gasturbogruppe oder Feuerungsanlage
DE4330083A1 (de) * 1993-09-06 1995-03-09 Abb Research Ltd Verfahren zum Betrieb eines Vormischbrenners
US5461865A (en) * 1994-02-24 1995-10-31 United Technologies Corporation Tangential entry fuel nozzle
DE19502796B4 (de) * 1995-01-30 2004-10-28 Alstom Brenner

Also Published As

Publication number Publication date
EP0807787A2 (de) 1997-11-19
CN1117243C (zh) 2003-08-06
JPH1068511A (ja) 1998-03-10
EP0807787A3 (de) 1999-03-24
CN1172227A (zh) 1998-02-04
DE19619873A1 (de) 1997-11-20
JP3863631B2 (ja) 2006-12-27
US5921766A (en) 1999-07-13
DE59710156D1 (de) 2003-07-03

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