EP0754908A2 - Procédé et dispositif pour supprimer des vibrations par flamme et par pression dans un four - Google Patents

Procédé et dispositif pour supprimer des vibrations par flamme et par pression dans un four Download PDF

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Publication number
EP0754908A2
EP0754908A2 EP96109647A EP96109647A EP0754908A2 EP 0754908 A2 EP0754908 A2 EP 0754908A2 EP 96109647 A EP96109647 A EP 96109647A EP 96109647 A EP96109647 A EP 96109647A EP 0754908 A2 EP0754908 A2 EP 0754908A2
Authority
EP
European Patent Office
Prior art keywords
gas
flame
burner
fuel
flow
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
EP96109647A
Other languages
German (de)
English (en)
Other versions
EP0754908B1 (fr
EP0754908B2 (fr
EP0754908A3 (fr
Inventor
Horst Dr. Ing. Büchner
Wolfgang Prof. Dr. Ing. Leuckel
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.)
BUECHNER, HORST, DR.-ING.
Leuckel Wolfgang Prof Dr-Ing
Deutscher Verein des Gas und Wasserfaches eV Technisch Wissenschaftlicher Verein
Original Assignee
DVGW Deutscher Verein des Gas- und Wasserfaches eV
Leuckel Wolfgang Prof Dr-Ing
Deutscher Verein des Gas und Wasserfaches eV Technisch Wissenschaftlicher Verein
Buechner Horst Dr-Ing
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26016953&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0754908(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19526369A external-priority patent/DE19526369A1/de
Application filed by DVGW Deutscher Verein des Gas- und Wasserfaches eV, Leuckel Wolfgang Prof Dr-Ing, Deutscher Verein des Gas und Wasserfaches eV Technisch Wissenschaftlicher Verein, Buechner Horst Dr-Ing filed Critical DVGW Deutscher Verein des Gas- und Wasserfaches eV
Publication of EP0754908A2 publication Critical patent/EP0754908A2/fr
Publication of EP0754908A3 publication Critical patent/EP0754908A3/fr
Publication of EP0754908B1 publication Critical patent/EP0754908B1/fr
Application granted granted Critical
Publication of EP0754908B2 publication Critical patent/EP0754908B2/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
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2210/00—Noise abatement

Definitions

  • the invention relates to a method for suppressing flame / pressure vibrations in a furnace, which has a burner with which a flame is generated and a combustion chamber into which the flame is directed, and a corresponding device for implementing the method.
  • unstable operating states occur under certain conditions, which are determined by the firing operating parameters such as thermal output and air ratio, which are characterized by changes in the flame over time , which go hand in hand with changes in particular the static pressure in the combustion chamber and in this upstream or downstream system parts. These unstable states also occur in furnaces whose flames have been sufficiently stabilized by known measures such as swirl currents, bluff bodies, etc.
  • combustion instabilities causes often a change in behavior compared to the stationary operation of the system and, in addition to increased noise pollution, also causes increased mechanical and / or thermal stress on the combustion chamber or the combustion chamber lining.
  • flame / pressure vibrations can lead to the destruction of the system in which they occur, so that a lot of effort is made to avoid such flame / pressure vibrations.
  • the present invention is therefore based on the object of specifying a method with which such flame / pressure vibrations with intolerable pressure amplitudes can be prevented.
  • the invention is based on the finding that the vibrations are essentially caused or amplified by ring vortices which form in the edge region of the flame.
  • ring vortices which are created by rolling up the edge areas of the fuel-containing burner flow, include hot flue gases when they are formed, which cause the fuel / air mixture which is also contained in the ring vortex to heat up quickly and cause an impulsive reaction of the fuel that stimulates pressure vibrations.
  • the flame is surrounded with a gas jacket flow emerging as close as possible to the flame or to the main burner flow, which has a higher flow velocity in the flame propagation direction than the outer or edge areas of the flame.
  • This results in an axial impulse exchange between the jacket flow and the flame or fuel gas / air flow, which causes the free flame or flow boundary layer of the fuel / air mixture to accelerate and thus effectively counteracts the formation of reactive vortices in this area.
  • the non-fuel-containing gas is preferably air, which is available in sufficient quantities everywhere.
  • air which is available in sufficient quantities everywhere.
  • inert gas it is also conceivable to use an inert gas here, but this would have a certain cost disadvantage.
  • the gas jacket flow consist of a non-ignitable mixture of gas and fuel
  • the gas jacket flow essentially behaves as if it contains no fuel with regard to its effect in suppressing the formation of reactive ring vortices. This means that any vortices that may arise in the boundary layer between the gas jacket flow and the surrounding medium cannot react and therefore cannot excite or amplify flame / pressure vibrations.
  • the gas can be both inert gas (for example nitrogen, water vapor or burned-out exhaust gases) and air, the former being the case If the fuel concentration is irrelevant, since inert gas cannot react with fuel in any mixing ratio, that is, it can burn, while in the second case the fuel concentration is outside the ignition limits of the respective fuel, so that here too, ring vortices arising from the gas jacket flow cannot react.
  • inert gas for example nitrogen, water vapor or burned-out exhaust gases
  • air the former being the case
  • the fuel concentration is irrelevant, since inert gas cannot react with fuel in any mixing ratio, that is, it can burn, while in the second case the fuel concentration is outside the ignition limits of the respective fuel, so that here too, ring vortices arising from the gas jacket flow cannot react.
  • a fuel / air mixture with fuel concentrations within the ignition limits dependent on the respective fuel can also be used as the medium of the gas jacket flow, if the essentially axial outflow speed of this gas jacket flow, which is in principle combustible, is chosen to be so high compared to the main burner flow that forms the flame that on the one hand A sufficient transmission of axial impulse and thus a sufficient acceleration of the outer areas of the flame or the main burner flow is guaranteed, but on the other hand the formation of an independent, stable flame (or several flames in the case of several individual outlet openings of the gas jacket flow) from the gas jacket flow is prevented. This means that the exit velocity of the mantle flow is significantly higher than the blow-off limit speed for a flame.
  • the gas jacket flow preferably runs parallel to the central axis of the flame, but it can also have a certain radial and / or tangential component with respect to this flame or main flow direction of the fuel / air flow, which results in a certain expansion of the gas jacket along the direction of the flame , taking into account that not all burners have flames in them critical areas do not have changing cross sections, but that flames can also assume the conical shape described. It is always important that the gas jacket flow has a sufficiently high momentum in the axial direction compared to the uncovered flame or fuel / air flow.
  • a furnace according to the invention with a burner for generating a flame and a combustion chamber into which the flame is directed has at least one gas outlet opening from which the gas flows out in a jacket-shaped manner in a surrounding manner .
  • the distance between the gas outlet opening and the edge of the combustion outlet from which the fuel / air mixture flows should be kept as small as possible.
  • the burners for carrying out this process are accordingly adapted in a known manner to these types of combustion process.
  • the gas outlet opening for generating the gas jacket flow is preferably designed as a gap or as a gap nozzle and closely surrounds the burner outlet, the burner outlet being both rotationally symmetrical can be formed as well as an elongated cross-sectional shape.
  • the gap is then designed as an annular gap nozzle, which is arranged in particular concentrically and closely spaced around the burner outlet.
  • a plurality of smaller gas outlet openings which are closely spaced apart, can also surround the burner outlet. It also applies here that the burner outlet and the overall arrangement of the gas outlet openings, which are preferably in the form of nozzles, are arranged concentrically, and that the large number of gas outlet openings or nozzles also generates a gas jacket flow which completely surrounds the flame of the burner and suppresses the formation of ring vortices.
  • the burner outlet and nozzle (s) do not have to be arranged in one plane, as long as it is ensured that the gas jacket flowing around the flame in the critical areas in which ring vortices can occur, sufficient acceleration of the edge areas of the flame can cause to prevent vortex formation.
  • FIG. 1 A burner for carrying out the method according to the invention is shown in FIG. 1: It is a swirl burner to which a premixed fuel gas / air mixture 1 is fed via a burner tube 2.
  • This burner tube ends at a swirl cupboard 3 which is rotationally symmetrical and has guide vanes 4 inclined on its outer circumference. These guide vanes have an inclination of approximately 30 °, as a result of which the outflowing fuel gas / air mixture is deflected and thus swirled.
  • a plurality of perforated holes 5 are provided, distributed through the swirl cupboard 3, through which a partial flow of the fuel gas / air mixture can flow and thus contributes to flame stabilization through pilot flame formation.
  • the fuel gas / air mixture emerging from the burner is ignited and forms a flame 12 which enters a burner chamber (not shown in FIG. 1).
  • the flame 12 of the burner is made from a jacket Gas flows around.
  • This jacket is brought about by a gas flow 8, which is passed through the burner through an annular channel 7 parallel to the burner tube 2 and exits the burner at an annular gap 9, which surrounds the swirl cabinet 3 in a closely spaced manner.
  • quarter-circle nozzles 10 are installed in the end region of the annular duct, which cause a strong acceleration in particular of the outer regions of the gas jacket flow in the axial direction (that is to say parallel to the axis 11 of the burner).
  • the flow velocity of the gas jacket flow emerging from the annular gap 9 is accelerated to such an extent due to the quarter-circle nozzles 10 that the velocity in the direction of the axis 11 is considerably higher than that in the direction of the flame of the burning fuel gas / air mixture behind the swirl cabinet 3, which means in the area between the in a flame-burning fuel gas / air mixture and the gas jacket flow closely surrounding it, a boundary layer acceleration of the burning fuel gas / air mixture takes place.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Gas Burners (AREA)
EP96109647A 1995-07-20 1996-06-15 Procédé et dispositif pour supprimer des vibrations par flamme et par pression dans un four Expired - Lifetime EP0754908B2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19526369 1995-07-20
DE19526369A DE19526369A1 (de) 1995-07-20 1995-07-20 Verfahren und Vorrichtung zur Unterdrückung von Flammen-/Druckschwingungen bei einer Feuerung
DE19542681 1995-11-16
DE19542681A DE19542681A1 (de) 1995-07-20 1995-11-16 Verfahren und Vorrichtung zur Unterdrückung von Flammen-/Druckschwingungen bei einer Feuerung

Publications (4)

Publication Number Publication Date
EP0754908A2 true EP0754908A2 (fr) 1997-01-22
EP0754908A3 EP0754908A3 (fr) 1998-01-21
EP0754908B1 EP0754908B1 (fr) 1998-09-09
EP0754908B2 EP0754908B2 (fr) 2001-04-18

Family

ID=26016953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109647A Expired - Lifetime EP0754908B2 (fr) 1995-07-20 1996-06-15 Procédé et dispositif pour supprimer des vibrations par flamme et par pression dans un four

Country Status (7)

Country Link
US (1) US5758587A (fr)
EP (1) EP0754908B2 (fr)
JP (1) JP3755934B2 (fr)
CN (1) CN1146543A (fr)
AT (1) ATE170968T1 (fr)
CZ (1) CZ202696A3 (fr)
IN (1) IN189365B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0931979A1 (fr) * 1998-01-23 1999-07-28 DVGW Deutscher Verein des Gas- und Wasserfaches -Technisch-wissenschaftliche Vereinigung- Procédé et dispositif pour supprimer les fluctuations par flamme et par pression dans un four
EP0985877A1 (fr) * 1998-09-10 2000-03-15 Abb Research Ltd. Dispositif et procédé pour réduire au minimum les vibrations thermoacoustques dans les chambres de combustion de turbines à gaz
EP1114967A1 (fr) * 2000-01-07 2001-07-11 ALSTOM Power (Schweiz) AG Procédé et dispositif pour supprimer les tourbillons dans une turbomachine
EP1122493A2 (fr) * 2000-02-02 2001-08-08 Robert Bosch Gmbh Brûleur avec générateur de vortex localisé dans la chambre de combustion
DE102008006607A1 (de) 2008-01-30 2009-08-06 Ibu-Tec Advanced Materials Ag Verfahren zur Herstellung feinteiliger Partikel
DE102011011207A1 (de) * 2011-02-14 2012-08-16 Air Liquide Deutschland Gmbh Brenner zum gleichmäßigen Erwärmen eines langen Ofens

Families Citing this family (16)

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Publication number Priority date Publication date Assignee Title
WO1999063276A1 (fr) * 1998-06-04 1999-12-09 Siemens Aktiengesellschaft Injecteur de combustible et procede pour injecter un jet de combustible
EP0987491B1 (fr) * 1998-09-16 2005-07-20 ALSTOM Technology Ltd Procédé pour prévenir les instabilités d'écoulement dans un brûleur
DE59811961D1 (de) * 1998-11-09 2004-10-21 Alstom Technology Ltd Baden Brenner
US6652265B2 (en) 2000-12-06 2003-11-25 North American Manufacturing Company Burner apparatus and method
DE60113792T2 (de) * 2001-01-04 2006-06-22 Haldor Topsoe A/S Drallbrenner
GB2375601A (en) * 2001-05-18 2002-11-20 Siemens Ag Burner apparatus for reducing combustion vibrations
US6929469B2 (en) * 2002-02-28 2005-08-16 North American Manufacturing Company Burner apparatus
EP1400752B1 (fr) 2002-09-20 2008-08-06 Siemens Aktiengesellschaft Brûleur à prémélange avec un écoulement d'air profilé
US7513115B2 (en) * 2005-05-23 2009-04-07 Power Systems Mfg., Llc Flashback suppression system for a gas turbine combustor
FR2925657B1 (fr) * 2007-12-19 2010-01-29 Mer Joseph Le Dispositif et procede pour stabiliser la pression et le debit d'un melange gazeux alimentant un bruleur cylindrique a combustion de surface
US9121609B2 (en) * 2008-10-14 2015-09-01 General Electric Company Method and apparatus for introducing diluent flow into a combustor
US8474265B2 (en) * 2009-07-29 2013-07-02 General Electric Company Fuel nozzle for a turbine combustor, and methods of forming same
US8708696B2 (en) * 2010-01-05 2014-04-29 Massachusetts Institute Of Technology Swirl-counter-swirl microjets for thermoacoustic instability suppression
WO2014204333A1 (fr) * 2013-06-17 2014-12-24 Schlumberger Canada Limited Assemblage de brûleur pour le brûlage à la torche de gaz à faible pouvoir calorifique
GB2524167A (en) * 2014-02-12 2015-09-16 Breen Energy Solutions Method of co-firing coal or oil with a gaseous fuel in a furnace
US10767900B2 (en) 2015-05-14 2020-09-08 Lochinvar, Llc Burner with flow distribution member

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US4162890A (en) * 1977-05-02 1979-07-31 Bloom Engineering Company, Inc. Combustion apparatus
DE3609622A1 (de) * 1985-04-01 1986-12-11 Qing Hua University, Peking Verfahren zur flammenstabilisierung und verbrennungsintensivierung sowie brenner und dessen verwendung
JPH05157239A (ja) * 1991-12-04 1993-06-22 Hitachi Ltd ガスタービン用燃焼器
DE4231788A1 (de) † 1992-09-23 1994-03-24 Koerting Ag Brenner für flüssige oder gasförmige Brennstoffe
JPH06265118A (ja) * 1993-03-10 1994-09-20 Mitsubishi Heavy Ind Ltd ガス燃料用バーナ
EP0643267A1 (fr) * 1993-03-08 1995-03-15 Mitsubishi Jukogyo Kabushiki Kaisha Procede de combustion d'un premelange gazeux et bruleur con u a cet effet

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US3632313A (en) * 1969-04-17 1972-01-04 Du Pont Method of heating oxygen-containing gases for the production of titanium dioxide pigment
US4162890A (en) * 1977-05-02 1979-07-31 Bloom Engineering Company, Inc. Combustion apparatus
DE3609622A1 (de) * 1985-04-01 1986-12-11 Qing Hua University, Peking Verfahren zur flammenstabilisierung und verbrennungsintensivierung sowie brenner und dessen verwendung
JPH05157239A (ja) * 1991-12-04 1993-06-22 Hitachi Ltd ガスタービン用燃焼器
DE4231788A1 (de) † 1992-09-23 1994-03-24 Koerting Ag Brenner für flüssige oder gasförmige Brennstoffe
EP0643267A1 (fr) * 1993-03-08 1995-03-15 Mitsubishi Jukogyo Kabushiki Kaisha Procede de combustion d'un premelange gazeux et bruleur con u a cet effet
JPH06265118A (ja) * 1993-03-10 1994-09-20 Mitsubishi Heavy Ind Ltd ガス燃料用バーナ

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0931979A1 (fr) * 1998-01-23 1999-07-28 DVGW Deutscher Verein des Gas- und Wasserfaches -Technisch-wissenschaftliche Vereinigung- Procédé et dispositif pour supprimer les fluctuations par flamme et par pression dans un four
WO1999037951A1 (fr) * 1998-01-23 1999-07-29 Dvgw Deutscher Verein Des Gas- Und Wasserfaches - Technisch-Wissenschaftliche Vereinigung Dispositif permettant de supprimer les oscillations de la flamme/pression dans un foyer, notamment une turbine a gaz
US6056538A (en) * 1998-01-23 2000-05-02 DVGW Deutscher Verein des Gas-und Wasserfaches-Technisch-Wissenschaftlich e Vereinigung Apparatus for suppressing flame/pressure pulsations in a furnace, particularly a gas turbine combustion chamber
EP0985877A1 (fr) * 1998-09-10 2000-03-15 Abb Research Ltd. Dispositif et procédé pour réduire au minimum les vibrations thermoacoustques dans les chambres de combustion de turbines à gaz
EP1114967A1 (fr) * 2000-01-07 2001-07-11 ALSTOM Power (Schweiz) AG Procédé et dispositif pour supprimer les tourbillons dans une turbomachine
US6698209B1 (en) 2000-01-07 2004-03-02 Alstom Technology Ltd Method of and appliance for suppressing flow eddies within a turbomachine
EP1122493A2 (fr) * 2000-02-02 2001-08-08 Robert Bosch Gmbh Brûleur avec générateur de vortex localisé dans la chambre de combustion
EP1122493A3 (fr) * 2000-02-02 2002-01-02 Robert Bosch Gmbh Brûleur avec générateur de vortex localisé dans la chambre de combustion
DE102008006607A1 (de) 2008-01-30 2009-08-06 Ibu-Tec Advanced Materials Ag Verfahren zur Herstellung feinteiliger Partikel
EP2092976A1 (fr) 2008-01-30 2009-08-26 IBU-tec advanced materials AG Procédé de fabrication de particules fines
DE102011011207A1 (de) * 2011-02-14 2012-08-16 Air Liquide Deutschland Gmbh Brenner zum gleichmäßigen Erwärmen eines langen Ofens

Also Published As

Publication number Publication date
EP0754908B1 (fr) 1998-09-09
JPH09178113A (ja) 1997-07-11
CN1146543A (zh) 1997-04-02
US5758587A (en) 1998-06-02
JP3755934B2 (ja) 2006-03-15
IN189365B (fr) 2003-02-15
EP0754908B2 (fr) 2001-04-18
ATE170968T1 (de) 1998-09-15
EP0754908A3 (fr) 1998-01-21
CZ202696A3 (en) 1997-02-12

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