EP1972851B1 - Brûleur - Google Patents

Brûleur Download PDF

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Publication number
EP1972851B1
EP1972851B1 EP07015922A EP07015922A EP1972851B1 EP 1972851 B1 EP1972851 B1 EP 1972851B1 EP 07015922 A EP07015922 A EP 07015922A EP 07015922 A EP07015922 A EP 07015922A EP 1972851 B1 EP1972851 B1 EP 1972851B1
Authority
EP
European Patent Office
Prior art keywords
pipes
fuel
mixing chamber
slots
vanes
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.)
Not-in-force
Application number
EP07015922A
Other languages
German (de)
English (en)
Other versions
EP1972851A2 (fr
EP1972851A3 (fr
Inventor
E.D. Vinogradov
J.I. Zacharov
Stanislav Vesely
Gustav Poslusny
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.)
EKOL spol sro
Nauchno-proizvodstvennoe predpriatie "EST"
Original Assignee
EKOL spol sro
Nauchno-proizvodstvennoe predpriatie "EST"
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 EKOL spol sro, Nauchno-proizvodstvennoe predpriatie "EST" filed Critical EKOL spol sro
Publication of EP1972851A2 publication Critical patent/EP1972851A2/fr
Publication of EP1972851A3 publication Critical patent/EP1972851A3/fr
Application granted granted Critical
Publication of EP1972851B1 publication Critical patent/EP1972851B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • 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
    • F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits

Definitions

  • the invention concerns power, transport and chemical engineering in common and especially may be used in combustion turbines.
  • Document RU2099634 describes a burner consisting of an external cylindrical casing, an air generator with vanes and in front of them there is a fuel distributor in the form of a supply tube with radially arranged distribution pipes with longitudinal slots for fuel feeding to the mixing chamber.
  • Another drawback of the above mentioned burner is represented by its short working life caused by the possibility of flame flashing into the mixing chamber and its stabilisation in the zones behind the fuel distribution pipes.
  • the speed of the air flow is low (in comparison to the speed behind the generator), which creates conditions for stabilisation of the head of the flame in the zones of air leak behind the fuel distribution pipes.
  • the operation of the combustion chamber cannot exclude short-term unexpected working modes allowing the flame flashing reaching the fuel distribution pipes. Flame stabilisation behind the pipes after such flash inevitably leads to through-burning of the air generator vanes that may cause a serious accident.
  • This burner consists of an external cylindrical casing, a coaxial air generator with the vanes and in front of them there is a fuel distributor in the form of a supply tube with radially arranged distribution pipes arranged along the cylindrical body of the tube and in a distance from each other with longitudinal slots for fuel feeding to the mixing chamber.
  • the radial fuel distribution pipes partly cover the through pass section of the cylindrical mixing chamber.
  • the fuel distribution pipes are connected with the distribution tube and they interrupt the inside channel of the pass section.
  • This drawback is more evident in the case of the prototype burner, for the burner according to RU 2099331 the speed is partially equalised during the air flow pass through the narrow section of the air whirl generator.
  • Document EP-0870 989 describes a burner comprising a mixing chamber with names and fuel distribution pipes arranged downstream of the names and parallel with the burner axis comprising fuel openings in lengthwise arrangement.
  • the aim of the invention is to present a burner with reduced concentration at the outlet from the mixing chamber and increased stability of the burning process with elimination of the possibility of the pressure pulsations with high amplitudes.
  • the mechanism of this phenomenon is based on the fact that in the case of slight air and fuel flow disturbances with frequency f is the phase excursion between the through flow fluctuation, pressure fluctuation and heat release conditioned in the given case with the time delay T, when in the combustion zone of the fuel/air mixture heat radiation varies, which results in a resonance.
  • the amplitude of the pressure pulsations is as high as the proportion of fuel supplied in a specific section of the mixing chamber.
  • the fuel is supplied to the flowing air in small doses distributed across the pipe's length, which eliminates the possibility of development of air flow pressure pulsation, increasing the working life of the combustion turbine.
  • the fuel is evenly distributed along the perimeter of the mixing chamber, which improves environmental characteristics of the burner as well as the turbine as a whole.
  • Coefficient k in the formula takes into the consideration some curvatures of the flow route resulting from air flow deflections and related to decreased angle of overlap of the air flow across the mixing chamber's length, due to the effects of friction, but also of the impact of the fuel pipes on the flow.
  • the value of the coefficient k may be calculated or specified by experiment.
  • Fig. 1 is a view of the burner in a cross section and from the front and Fig. 2 is an unfolded axial cross section of the fuel pipes in the mixing chamber.
  • the burner in Fig.1 consists of an external cylindrical casing 1, an air whirl generator vanes 2 arranged directly on the fuel distribution tube 3 and they are turning together by the work. All these elements are part of the cylindrical mixing chamber 4 in which behind the vanes 2 the air flow is supplied by fuel due a circular arrangement of the pipes 5 with slots 6 in the lengthwise arrangement for fuel feeding into the mixing chamber.
  • the pipes 5 arranged parallel to the burner axis protrudes through the whirl vanes 2 and are connected to the fuel distribution tube 3 and turning together with the tube 3.
  • the pipe length L used in the formula means the active length, i.e. the length equipped with the slots for the fuel supply into the mixing chamber.
  • the burner when the burner is sufficiently big, there may be two or more circular rows of the fuel distributing pipes installed in the mixing chamber in different distances, the pipes arranged parallel with the burner axis.
  • the burner operates as follows:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Claims (1)

  1. Brûler, constitué d'un enveloppe cylindrique externe, un générateur de la turbulence avec d'ailles et un tube pour conduit d'combustible, cette pieces creánt un chambre de melánge cylindrique, dans laquelle derriere d'ailles un dispositif pour conduit d'combustible est arrangé, ayant une forme des tubes avec d'orifices longitudement disposée pour conduit d'combustible dans la chambre de melange, les tubes sont arrangeé parallèlement avec l'axe de brûler, caractérisé en ce que le longueur (L) des tubes (5), qui etánt munie avec d'orifices (6) pour conduit d'combustible dans la chambre de melange (4) est calculé selon la formule: L = k * π * D * n - 1 / n * N * tgϕ ,
    Figure imgb0008
    ou
    D - est le diamètre de cercle dans lequelle les tubes sont arrangée
    N - est le nombre les tubes dans le cercle
    n - est le nombre d'orifices pour conduit d'combustible dans chacque tube
    ϕ - est le agle de la courant d'air de ailles de le générateur de la turbulace
    k - est le coefficient
EP07015922A 2007-03-19 2007-08-14 Brûleur Not-in-force EP1972851B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2007109930/06A RU2348864C2 (ru) 2007-03-19 2007-03-19 Горелка

Publications (3)

Publication Number Publication Date
EP1972851A2 EP1972851A2 (fr) 2008-09-24
EP1972851A3 EP1972851A3 (fr) 2010-08-04
EP1972851B1 true EP1972851B1 (fr) 2011-04-06

Family

ID=39473386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07015922A Not-in-force EP1972851B1 (fr) 2007-03-19 2007-08-14 Brûleur

Country Status (4)

Country Link
EP (1) EP1972851B1 (fr)
AT (1) ATE504783T1 (fr)
DE (1) DE602007013694D1 (fr)
RU (1) RU2348864C2 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5943866A (en) * 1994-10-03 1999-08-31 General Electric Company Dynamically uncoupled low NOx combustor having multiple premixers with axial staging
US5908160A (en) * 1996-12-20 1999-06-01 United Technologies Corporation Centerbody for a two stream tangential entry nozzle
GB2324147B (en) * 1997-04-10 2001-09-05 Europ Gas Turbines Ltd Fuel-injection arrangement for a gas turbine combuster
US6381964B1 (en) * 2000-09-29 2002-05-07 General Electric Company Multiple annular combustion chamber swirler having atomizing pilot
DE10104695B4 (de) * 2001-02-02 2014-11-20 Alstom Technology Ltd. Vormischbrenner für eine Gasturbine

Also Published As

Publication number Publication date
EP1972851A2 (fr) 2008-09-24
RU2348864C2 (ru) 2009-03-10
ATE504783T1 (de) 2011-04-15
EP1972851A3 (fr) 2010-08-04
DE602007013694D1 (de) 2011-05-19
RU2007109930A (ru) 2008-09-27

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