EP0777081B1 - Brûleur à prémélange - Google Patents

Brûleur à prémélange Download PDF

Info

Publication number
EP0777081B1
EP0777081B1 EP96810738A EP96810738A EP0777081B1 EP 0777081 B1 EP0777081 B1 EP 0777081B1 EP 96810738 A EP96810738 A EP 96810738A EP 96810738 A EP96810738 A EP 96810738A EP 0777081 B1 EP0777081 B1 EP 0777081B1
Authority
EP
European Patent Office
Prior art keywords
premix burner
burner according
interior space
air
fuel
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
EP96810738A
Other languages
German (de)
English (en)
Other versions
EP0777081A3 (fr
EP0777081A2 (fr
Inventor
Klaus Dr. Döbbeling
Adnan Dr. Eroglu
Hans Peter Knöpfel
Wolfgang Dr. Polifke
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 EP0777081A2 publication Critical patent/EP0777081A2/fr
Publication of EP0777081A3 publication Critical patent/EP0777081A3/fr
Application granted granted Critical
Publication of EP0777081B1 publication Critical patent/EP0777081B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F23D11/402—Mixing chambers downstream of the nozzle
    • 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
    • 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 present invention relates to a premix burner according to the preamble of claim 1.
  • Document EP-A-0 629 817 discloses a premix burner a perforated plate for introducing fresh air into the combustion chamber with the effect over the entire axial length of the perforated Plate to achieve an even ranch gas admixture.
  • a burner which essentially consists of a cylindrical chamber, which in turn has several tangentially arranged slots, through which the combustion air inside the chamber flows.
  • these slots at the transition to the interior the chamber, act in the axial direction a number of Fuel nozzles, through which preferably a gaseous one Fuel mixed with the combustion air flowing through there becomes.
  • the interior of the chamber is also with provided a conical body, which is in the direction of flow tapered, being conical in the area of the tip Body more fuel nozzles for one preferably liquid fuel are provided. Downstream from the top of the cone the combustion air becomes ignition for this body brought.
  • the flow in the chamber must itself be subcritical, i.e. the twist count must be here be so small that there is no vortex burst.
  • the critical swirl number can be corrected by three parameters Reaching the place: By changing the width of the tangential slots, and on the other hand by an adjustment the angle of the conical body inside the chamber and by adding a central supporting air, it is swirled or untwisted. Due to the fuel injection in the area of the slots, these are severely limited in their design.
  • the invention seeks to remedy this.
  • the invention how it is characterized in the claims, the task lies the basis for a premix burner of the type mentioned Way to improve the quality of the mixture and the risk of reignition to eliminate during the whole operation.
  • the main advantage of the invention is that that the improvement in all spin-stabilized premix burners, especially among those who avail themselves the critical swirl number to form a backflow zone work, lets apply that on the principle two or more staggered partial shells are constructed, the offset partial shells air inlet slots form the parallel, opening or closing to the burner axis run.
  • FIG. 2 or 3 In order to better understand the structure of the premix burner 1 it is advantageous if also FIG. 2 or 3 can be used. Furthermore, not unnecessary to Fig. 1 The supply channels 11c are confusing and 12c according to FIG. 2 or 3 have not been shown in more detail. in the the following will be as needed in the description of FIG. 1 referred to the remaining FIGS. 2 and 3.
  • the premix burner according to FIG. 1 consists of two hollow partial shells 11, 12 which are nested in one another offset from one another (cf. FIG. 2).
  • the offset of the respective central axis or longitudinal axis of symmetry 11b, 12b (see FIG. 2) to one another creates a tangential air inlet slot 11a, 12a on both sides, in a mirror-image arrangement, through which a combustion mixture 15 is formed in one of the partial shells 11, 12 Interior 20 of the premix burner 1 flows.
  • the configuration of these air inlet slots 11a, 12a is discussed in more detail below.
  • the shells 11, 12 mentioned are cylindrical in the direction of flow.
  • the flow cross section formed by the interior 20 can, however, be designed to decrease or increase in the flow direction, depending on the application, regularly or irregularly.
  • a flow cross-section of the interior 20 designed as a venturi tube in the flow direction is to serve as an example here.
  • the design options mentioned are not shown in any more detail, since they are readily apparent to the person skilled in the art.
  • Arranged in the interior 20 is a conical inner body 13, which tapers in the direction of flow, extends far into the interior 20 and largely tapers out.
  • the conical configuration of this inner body 13 is not limited to the shape shown: An outer shape of this inner body 13 as a diffuser or confuser is also possible.
  • the inner body 13 is traversed by at least one bore 14, through which a liquid fuel 16 is preferably directed into the front area.
  • the injection of the liquid fuel 16 in the area of the tip of the inner body 13 forms the head stage of the premix burner 1.
  • the inner body 13 can easily be supplemented with a swirl generator, not shown in the figure, which supports the mixing of the injected fuel 16.
  • the flow cross-section of the interior 20 experiences a cross-sectional jump via a front wall 17, the cross-section of which then forms the flow cross-section of the flame tube 21.
  • the front wall 17 itself has a number of bores through which dilution air or cooling air 19 is fed to the front area of the combustion chamber 22 as required.
  • the combustion mixture 15 consists of air and fuel (see FIG. 2).
  • the combustion mixture 15 can also contain portions of a recirculated exhaust gas or an amount of steam. It generally applies that within the cross-sectional jump in the area of the front wall 17 a flow-like edge zone is formed, in which vortex detachments occur due to the negative pressure prevailing there, which in turn support flame stabilization.
  • the previously mentioned dilution air or cold air 19 is admixed.
  • the combustion mixture 15 flowing tangentially into the interior 20 creates a swirl of the medium around the inner body 13.
  • a vortex burst occurs, a homogeneous fuel concentration depending on the formation of the tangential air inlet slots or on the installation of vortex generators in the area of the air inlet slots.
  • the ignition takes place at the top of the return flow zone 18: only at this point can a stable flame front arise.
  • a backlash of the flame into the interior 20 of the premix burner 1, as is always latent in the case of the premixing sections which have become known, while remedial action is sought there with complicated flame holders is not to be feared here for the reasons mentioned.
  • combustion air is additionally preheated or enriched with one of the media mentioned, this supports the evaporation of the liquid fuel 16 brought in through the inner body 13.
  • the inner body 13 With designing the inner body 13 with regard to the conical configuration and the width of the tangential air inlet slots 11a, 12a, there are narrow limits to be observed so that the desired flow field, ie the critical swirl number, of the combustion mixture 15 can be set at the outlet of the interior 20.
  • the axial speed of the combustion mixture 15 within the interior 20 of the premix burner 1 can be changed by supplying an axial combustion air flow (not shown in more detail).
  • the design of the premix burner 1 is furthermore excellently suitable for changing the size of the tangential air inlet slots 11a, 12a, so that a relatively large operating bandwidth can be recorded without changing the overall length of the premix burner 1.
  • Fig. 2 shows the configuration of the nested Partial shells 11, 12.
  • the partial shells 11, 12 can also be moved relative to one another via this plane, i.e. it is readily possible to overlap them in the Area of the tangential air inlet slots 11a, 12a accomplish.
  • the tangential Air inlet slots 11a, 12a each form the outlet opening a feed channel 11c, 12c, in which detached from the interior 20, the combustion mixture 15 is formed before it flows into this interior 20.
  • the feed channels 11c, 12c In enough Distance upstream of the tangential air inlet slots 11a, 12a, the feed channels 11c, 12c have vortex generators 11d, 12d on the air flowing in there 23 swirl integrally. At a reasonable distance downstream this vortex generator 11d, 12d, the injection of one is preferred gaseous fuel 24 made, with what then along the remaining route of the feed channels 11c, 12c can form the desired air / fuel mixture before this as a combustion mixture 15 in integrally the same Consistency over the entire length of the tangential air inlet slots 11a, 12a flows into the interior 20.
  • the feed channels 11c, 12c shown have a largely cylindrical shape, its length and flow cross-section designed for optimal air / fuel premixing are.
  • the one to be formed within the feed channels 11c, 12c Flow must be designed so that from the interior 20, if the flame front becomes unstable, There is no risk of reignition: due to the arrangement shown the vortex generator 11d, 12d opposite the fuel injection 24 there is no risk of reignition. On the transfer the central axes 11b, 12b have already been shown in FIG. 1 discussed in more detail.
  • FIG. 3 shows, in contrast to FIG. 2, feed channels, which are at a reasonable distance from the tangential air inlet slots 11a, 12a have a venturi mixer 25a, 25b.
  • the fuel injection 24 is at the narrowest point performed. There is also the greatest speed which ensures the best possible mixture formation is, again with the exclusion of a risk of reignition. Otherwise, the structure of FIG. 3 corresponds to that of Fig. 2.
  • Fig. 4 largely corresponds to Fig. 1, here the inner body 13 expanded centrally with a stream of supporting air 26 which is a further measure to create the critical Swirl number in the right place.
  • the number of shells are not on two limited. A larger number can be used without further ado. Becomes a spiral inlet of the combustion mixture 15 sought in the interior 20, this can be done easily through a single tangential air inlet slot to reach.
  • Consists of the premix burner to be formed by the shells a connected pipe, so the tangential Injection into the interior through duct-like bushings through the wall thickness of this pipe.

Landscapes

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

Claims (13)

  1. Brûleur à prémélange avec un espace intérieur (20) stabilisant les turbulences, lequel brûleur est équipé d'un corps intérieur (13) s'étendant en forme de cône dans le sens d'écoulement de l'espace intérieur (20), l'enveloppe de l'espace intérieur (20) étant percée par au moins une fente d'entrée d'air (11a, 12a) disposée tangentiellement dans l'extension longitudinale pour l'écoulement d'un fluide combustible (15) dans l'espace intérieur (20), caractérisé en ce qu'en amont de la fente d'entrée d'air (11a, 12a) s'étend un canal d'alimentation (11c, 12c) qui est au moins équipé de dispositifs de mise en turbulence d'un flux d'air (23) et d'introduction d'un combustible (24).
  2. Brûleur à prémélange selon la revendication 1, caractérisé en ce que la section transversale de passage formée par l'enveloppe de l'espace intérieur (20) s'étend de manière cylindrique dans le sens de l'écoulement.
  3. Brûleur à prémélange selon la revendication 1, caractérisé en ce que la section transversale de passage formée par l'enveloppe de l'espace intérieur (20) se présente sous la forme d'une section à venturi dans le sens de l'écoulement.
  4. Brûleur à prémélange selon la revendication 1, caractérisé en ce que l'enveloppe de l'espace intérieur (20) se compose d'au moins deux coquilles partielles (11, 12) imbriquées l'une dans l'autre de manière décalée et en ce que les parois voisines des coquilles partielles forment dans leur extension longitudinale des fentes d'entrée d'air (11a, 12a) tangentielles pour l'écoulement du fluide combustible (15) dans l'espace intérieur.
  5. Brûleur à prémélange selon la revendication 1, caractérisé en ce que les moyens d'optimisation de la qualité du mélange entre l'air (23) et le combustible (24) à l'intérieur du canal d'alimentation (11c, 12c) sont des générateurs de turbulence (11d, 12d) et en ce que l'introduction du combustible (24) a lieu en aval de ces générateurs de turbulence (11d, 12d).
  6. Brûleur à prémélange selon la revendication 1, caractérisé en ce que le combustible (24) peut être introduit à l'endroit le plus étroit d'un mélangeur à venturi (25a, 25b) formé dans le canal d'alimentation (11c, 12c).
  7. Brûleur selon la revendication 1, caractérisé en ce qu'en aval de l'espace intérieur (20) se trouve une chambre de combustion (22), en ce qu'il y a un brusque changement de section transversale (21) entre l'espace intérieur et la chambre de combustion par l'intermédiaire d'une paroi frontale (17) et en ce que, dans la zone du plan du brusque changement de section transversale (21), une zone d'écoulement de retour (18) peut être activée :
  8. Brûleur à prémélange selon la revendication 7, caractérisé en ce que la paroi frontale (17) est pourvue d'un certain nombre d'orifices pour l'admission d'un flux d'air (19) dans la chambre de combustion (22).
  9. Brûleur à prémélange selon la revendication 1, caractérisé en ce que le corps intérieur (13) est muni d'au moins une conduite de combustible (14) par laquelle un combustible (16) et/ou de l'air de soutien (26) peuvent être amenés dans l'espace intérieur (20).
  10. Brûleur à prémélange selon la revendication 1, caractérisé en ce que le corps intérieur (13) est équipé, dans la zone de sa pointe, d'au moins un générateur de turbulence.
  11. Brûleur à prémélange selon les revendications 1 et 4, caractérisé en ce que les fentes d'entrée d'air (11a, 12a) tangentielles présentent, dans le sens longitudinal du brûleur à prémélange (1), une section transversale de passage décroissante.
  12. Brûleur à prémélange selon la revendication 1, caractérisé en ce que le corps intérieur (13) s'étendant en forme de cône prend la forme d'un diffuseur.
  13. Brûleur à prémélange selon la revendication 1, caractérisé en ce que le corps intérieur (13) s'étendant en forme de cône prend la forme d'une tuyère convergente.
EP96810738A 1995-12-02 1996-11-06 Brûleur à prémélange Expired - Lifetime EP0777081B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545026A DE19545026A1 (de) 1995-12-02 1995-12-02 Vormischbrenner
DE19545026 1995-12-02

Publications (3)

Publication Number Publication Date
EP0777081A2 EP0777081A2 (fr) 1997-06-04
EP0777081A3 EP0777081A3 (fr) 1998-10-21
EP0777081B1 true EP0777081B1 (fr) 2003-03-05

Family

ID=7779042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810738A Expired - Lifetime EP0777081B1 (fr) 1995-12-02 1996-11-06 Brûleur à prémélange

Country Status (4)

Country Link
US (1) US5791894A (fr)
EP (1) EP0777081B1 (fr)
JP (1) JP3828969B2 (fr)
DE (2) DE19545026A1 (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19640198A1 (de) * 1996-09-30 1998-04-02 Abb Research Ltd Vormischbrenner
US6178752B1 (en) * 1998-03-24 2001-01-30 United Technologies Corporation Durability flame stabilizing fuel injector with impingement and transpiration cooled tip
US6141954A (en) * 1998-05-18 2000-11-07 United Technologies Corporation Premixing fuel injector with improved flame disgorgement capacity
CA2383833C (fr) * 1999-09-06 2009-04-14 Shell Internationale Research Maatschappij B.V. Dispositif melangeur
WO2001096785A1 (fr) * 2000-06-15 2001-12-20 Alstom (Switzerland) Ltd Procede pour l'exploitation d'un bruleur et bruleur a injection etagee de gaz premelange
DE10029607A1 (de) * 2000-06-15 2001-12-20 Alstom Power Nv Brenner mit gestufter Vormischgas-Eindüsung
DE10050248A1 (de) 2000-10-11 2002-04-18 Alstom Switzerland Ltd Brenner
US7721726B2 (en) 2006-01-03 2010-05-25 Lg Electronics Inc. Gas radiation burner
KR100765283B1 (ko) * 2006-01-06 2007-10-09 엘지전자 주식회사 가스복사 버너
US7717105B2 (en) 2006-01-06 2010-05-18 Lg Electronics Inc. Gas radiation burner
KR100751417B1 (ko) * 2006-01-20 2007-08-23 엘지전자 주식회사 가스 버너 및 이를 이용한 히팅장치
US7520272B2 (en) * 2006-01-24 2009-04-21 General Electric Company Fuel injector
KR100793758B1 (ko) * 2007-02-06 2008-01-10 엘지전자 주식회사 가스복사 버너
CN101910723B (zh) 2007-11-27 2013-07-24 阿尔斯通技术有限公司 用于在预混燃烧器中燃烧氢气的设备
EP2257736B1 (fr) 2008-03-07 2015-11-25 Alstom Technology Ltd Procédé de production de gaz chaud
WO2009109448A1 (fr) * 2008-03-07 2009-09-11 Alstom Technology Ltd Ensemble brûleur et son utilisation
WO2009109452A1 (fr) 2008-03-07 2009-09-11 Alstom Technology Ltd Ensemble brûleur et son utilisation
US20110005189A1 (en) * 2009-07-08 2011-01-13 General Electric Company Active Control of Flame Holding and Flashback in Turbine Combustor Fuel Nozzle
KR101301729B1 (ko) * 2010-08-11 2013-09-09 (주)오선텍 개질기용 버너
JP5507422B2 (ja) * 2010-11-16 2014-05-28 大阪瓦斯株式会社 予混合管状火炎バーナ
JP5370465B2 (ja) * 2011-11-18 2013-12-18 Ｊｆｅスチール株式会社 長火炎バーナおよびラジアントチューブ式加熱装置
WO2015018962A2 (fr) * 2013-08-07 2015-02-12 Abengoa Hidrogeno, S. A. Brûleur intégré dans un système de reformage d'hydrocarbures et d'alcools et système de reformage d'hydrocarbures et d'alcools le comprenant, et procédé associé
JP6602004B2 (ja) * 2014-09-29 2019-11-06 川崎重工業株式会社 燃料噴射器及びガスタービン
EP3133342A1 (fr) * 2015-08-20 2017-02-22 Siemens Aktiengesellschaft Brûleur à double carburant prémélangé avec un composant d'injection éfilé de carburant liquide principal

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE413283C (de) * 1925-05-05 Faconeisen Walzwerk L Mannstae Gasfeuerung fuer Dampfkessel und Drehtrommeln
JPH01302015A (ja) * 1988-05-30 1989-12-06 Matsushita Electric Ind Co Ltd 燃焼装置
JP2772955B2 (ja) * 1988-07-08 1998-07-09 株式会社日本ケミカル・プラント・コンサルタント 燃焼器用の燃料混合器
CH680946A5 (fr) * 1989-12-19 1992-12-15 Asea Brown Boveri
US5307634A (en) 1992-02-26 1994-05-03 United Technologies Corporation Premix gas nozzle
CH687831A5 (de) * 1993-04-08 1997-02-28 Asea Brown Boveri Vormischbrenner.
DE4320212A1 (de) * 1993-06-18 1994-12-22 Abb Research Ltd Feuerungsanlage
US5351477A (en) * 1993-12-21 1994-10-04 General Electric Company Dual fuel mixer for gas turbine combustor
US5461865A (en) * 1994-02-24 1995-10-31 United Technologies Corporation Tangential entry fuel nozzle

Also Published As

Publication number Publication date
US5791894A (en) 1998-08-11
DE59610190D1 (de) 2003-04-10
JP3828969B2 (ja) 2006-10-04
EP0777081A3 (fr) 1998-10-21
EP0777081A2 (fr) 1997-06-04
JPH09178126A (ja) 1997-07-11
DE19545026A1 (de) 1997-06-05

Similar Documents

Publication Publication Date Title
EP0777081B1 (fr) Brûleur à prémélange
EP0321809B1 (fr) Procédé pour la combustion de combustible liquide dans un brûleur
EP0704657B1 (fr) Brûleur
EP0794383B1 (fr) Méthode d'exploitation d'une buse de pulvérisation par pression
EP0918191B1 (fr) Brûleur pour la mise en oeuvre d'un générateur de chaleur
EP0833105B1 (fr) Brûleur à prémélange
EP0718561B1 (fr) Brûleur
EP0694740A2 (fr) Chambre de combustion
CH680467A5 (fr)
EP0724114A2 (fr) Brûleur
DE19757189B4 (de) Verfahren zum Betrieb eines Brenners eines Wärmeerzeugers
EP0641971B1 (fr) Procédé pour commander un brûleur à prémélange et brûleur pour l'exécution du procédé
EP0780630A2 (fr) Brûleur pour un générateur de chaleur
EP0851172B1 (fr) Brûleur et méthode pour la mise en oeuvre d'une chambre de combustion avec un combustible liquide et/ou gazeux
EP0994300B1 (fr) Brûleur pour la conduite d'un générateur de chaleur
CH679692A5 (fr)
EP0783089B1 (fr) Brûleur sous forme d'un cône
EP0694730B1 (fr) Bruleur
EP0483554B1 (fr) Procédé pour la réduction au minimum des émissions de NOx dans une combustion
EP0751351A1 (fr) Chambre de combustion
EP0903540B1 (fr) Brûleur pour la mise en oeuvre d'un générateur de chaleur
DE19537636B4 (de) Kraftwerksanlage
DE19515082B4 (de) Vormischbrenner
EP0777082A2 (fr) Brûleur à prémélange
EP0913630B1 (fr) Brûleur pour la mise en oeuvre d'un générateur de chaleur

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE GB

17P Request for examination filed

Effective date: 19990421

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALSTOM

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20020508

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALSTOM (SWITZERLAND) LTD

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59610190

Country of ref document: DE

Date of ref document: 20030410

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20030506

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20031208

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59610190

Country of ref document: DE

Representative=s name: ROESLER, UWE, DIPL.-PHYS.UNIV., DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20131017 AND 20131023

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59610190

Country of ref document: DE

Representative=s name: ROESLER, UWE, DIPL.-PHYS.UNIV., DE

Effective date: 20131106

Ref country code: DE

Ref legal event code: R081

Ref document number: 59610190

Country of ref document: DE

Owner name: GENERAL ELECTRIC TECHNOLOGY GMBH, CH

Free format text: FORMER OWNER: ALSTOM (SWITZERLAND) LTD., BADEN, CH

Effective date: 20131106

Ref country code: DE

Ref legal event code: R081

Ref document number: 59610190

Country of ref document: DE

Owner name: ALSTOM TECHNOLOGY LTD, CH

Free format text: FORMER OWNER: ALSTOM (SWITZERLAND) LTD., BADEN, CH

Effective date: 20131106

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20151119

Year of fee payment: 20

Ref country code: GB

Payment date: 20151118

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59610190

Country of ref document: DE

Representative=s name: ROESLER, UWE, DIPL.-PHYS.UNIV., DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 59610190

Country of ref document: DE

Owner name: GENERAL ELECTRIC TECHNOLOGY GMBH, CH

Free format text: FORMER OWNER: ALSTOM TECHNOLOGY LTD, BADEN, CH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59610190

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20161105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20161105