EP0445393B1 - Brûleur avec récirculation des gaz d'échappement, notamment brûleur à air soufflé - Google Patents

Brûleur avec récirculation des gaz d'échappement, notamment brûleur à air soufflé Download PDF

Info

Publication number
EP0445393B1
EP0445393B1 EP90123830A EP90123830A EP0445393B1 EP 0445393 B1 EP0445393 B1 EP 0445393B1 EP 90123830 A EP90123830 A EP 90123830A EP 90123830 A EP90123830 A EP 90123830A EP 0445393 B1 EP0445393 B1 EP 0445393B1
Authority
EP
European Patent Office
Prior art keywords
burner
exhaust gas
gas return
return duct
burner according
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
EP90123830A
Other languages
German (de)
English (en)
Other versions
EP0445393A2 (fr
EP0445393A3 (en
Inventor
Detlef Dipl.-Ing. Bohmann
Heinz-Peter Dipl.-Ing. Schricks
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.)
Klockner Warmetechnik Zweigniederlassung Hechingen GmbH
Original Assignee
Klockner Warmetechnik Zweigniederlassung Hechingen GmbH
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=6401413&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0445393(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Klockner Warmetechnik Zweigniederlassung Hechingen GmbH filed Critical Klockner Warmetechnik Zweigniederlassung Hechingen GmbH
Publication of EP0445393A2 publication Critical patent/EP0445393A2/fr
Publication of EP0445393A3 publication Critical patent/EP0445393A3/de
Application granted granted Critical
Publication of EP0445393B1 publication Critical patent/EP0445393B1/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
    • 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
    • F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion

Definitions

  • the invention relates to a burner, in particular forced draft burner, for boilers, combustion plants or the like, with an air supply device, a fuel supply device introducing liquid or gaseous fuel, a flame device immersing in a combustion chamber and forming the burner flame, and a part of the exhaust gases formed during the combustion Exhaust gas recirculation duct returning to the air supply device, an area of the exhaust gas recirculation duct having a temperature above the dew point of the exhaust gases during operation of the burner being provided with at least one supply opening for outside air.
  • the recirculated exhaust gases usually have a dew point of 50 - 60 ° C. If these exhaust gases are mixed with an excessive amount of outside air and reach the burner, which is colder with regard to these temperatures and in which temperatures of approx. 30 - 40 ° C, water can condense out. As a result of this condensed water, corrosion occurs in the burner, which not only causes steel parts to rust, but also corrodes electrical contacts, which can lead to malfunctions in the burner.
  • the object of the present invention is to prevent in a simple manner that water can condense in the burner due to the recirculated exhaust gases at changing temperatures.
  • this object is achieved in that a control device which adjusts the flow cross section of the feed opening as a function of the minimum temperature in the exhaust gas recirculation circuit is provided for setting the quantitative ratio between the recirculated exhaust gas stream and the intake outside air stream.
  • the controlled supply of dry outside air which is automatically sucked in through the supply opening, regulates the dew point exactly to a value that is slightly below the temperatures occurring in the exhaust gas recirculation system, although this is also possible with changing temperatures.
  • the exhaust gas recirculation duct can, on the one hand, expediently be connected to the combustion chamber or to the downstream exhaust duct system, and at the other end it can open either on the suction side or on the pressure side in the manner of an injector on the burner air supply device.
  • the feed opening in the exhaust gas recirculation channel is expediently provided with flow guiding elements in order to ensure an optimal inflow of the outside air. If these flow guide elements are adjustable, in particular designed to be pivotable, they can simultaneously serve to adjust the feed opening or the feed openings.
  • the flame device has a flame tube which is at least double-walled outside the combustion chamber, the region between the double walls being the exhaust gas recirculation duct forms, and wherein the outer wall is provided with the at least one feed opening, which can expediently extend like a ring around the outer wall.
  • An optimal minimization of the supply of outside air can be achieved by a control device which adjusts the flow cross section of the supply opening depending on the minimum temperature in the exhaust gas recirculation duct.
  • the dew point is always kept at a value slightly above the minimum temperature in each case, even with changing temperatures in the burner.
  • a converter element converting solid particles into gaseous components is advantageously provided in the exhaust gas recirculation channel.
  • This converter element which essentially covers the entire cross-section of the exhaust gas recirculation channel, is filter-like permeable and heat-resistant at least up to a temperature of 800 ° C.
  • a ceramic material, in particular aluminum oxide, has proven to be a particularly favorable material for the converter element. Since the solid particles are not retained in the converter element but are converted into gaseous components due to the high temperature, the converter element cannot become clogged and therefore does not require any maintenance.
  • the converter element can have a pore size that generates a low flow resistance and exceeds the average diameter of dust and soot particles. This reduces the flow resistance.
  • a schematically illustrated heating boiler 10 contains a combustion chamber 11, from which the exhaust gases generated during operation can be fed to a chimney (not shown) via an exhaust gas duct system 12. Both in the combustion chamber 11 and in the exhaust duct system 12, the walls heat up during operation, which means, for example, the water in a manner not shown Heating system is heated. Instead of a boiler, it can also be a waste incinerator or the like. act.
  • a fan burner 13 again shown only schematically, has a flame tube 14 on the output side, which projects into the combustion chamber 11 through a corresponding opening.
  • the passage of the flame tube 14 is usually designed as a holding device for the forced draft burner 13. This has not been shown to simplify FIG. 1.
  • a fuel supply line 15 runs from the fan burner 13 within the flame tube 14 to the end region of the flame tube 14 on the combustion chamber side.
  • a distributor nozzle 16 is arranged at the end of the fuel supply line 15.
  • a fan 17 arranged in the interior of the fan burner 13 draws in outside air and blows it through the flame tube 14 into the combustion chamber 11.
  • Gaseous or liquid fuel for example natural gas or heating oil
  • This mixes with the outside air supplied through the flame tube 14 and does not produce a combustible mixture that has a known mixture Ignition device shown is ignited electrically, whereby a flame 18 is formed.
  • a baffle plate 19 in the combustion chamber end area of the flame tube 14 supports the desired formation of the flame 18. Since such boilers and forced draft burners are known in many ways, a more detailed description can be dispensed with.
  • a tubular exhaust gas recirculation duct 20 runs to the suction side of the fan 17. As a result, part of the exhaust gases generated is returned to the fan burner 13 and is thus subjected to the combustion process again in order to improve the exhaust gas quality.
  • a converter element 21 for converting sucked-in solid particles, such as soot or dust, into gaseous constituents is arranged in the exhaust-gas duct-side inlet region of the exhaust gas recirculation duct 20.
  • This converter element consists of a porous ceramic material, for example of aluminum oxide (Al2O3).
  • Al2O3 aluminum oxide
  • the exhaust gas can pass through the converter element 21 with low flow resistance, since the pore size exceeds the average diameter of dust and soot particles. Since this converter element 21 is arranged directly on the exhaust gas duct system, that is to say on the boiler, it is heated to 400-600 ° C. by the exhaust gases.
  • the solid particles contained in the exhaust gas stream are removed by the Channel system of the porous ceramic material passed and come into multiple contact with the hot wall, so that they are burned into gaseous components. On the one hand, you can no longer get to the fan burner 13 and contaminate it, but they also do not remain in the converter element 21, so that it remains maintenance-free.
  • the high operating temperature of 400-600 ° C. is essential on the converter element 21, so that the converter element 21 should be heat-resistant at least up to a temperature of approximately 800 ° C.
  • the porous or filter-like permeable structure is also essential.
  • the converter element 21 can also consist of a porous, metallic pressed or sintered body or else of a compressed, e.g. pressed metal braid.
  • the exhaust gas recirculation duct 20 has an opening 22 which is connected to the surroundings and through which outside air can flow or is sucked into the exhaust gas recirculation duct 20.
  • the opening 22 is provided with a flow guiding element 23.
  • the hot exhaust gases usually have a dew point of 50 - 60 ° C.
  • They When they reach the fan burner 13, they are cooled down so far that their temperature drops below the dew point so that water condenses. This water undesirably causes corrosion in the warm forced draft burner 13. Such condensation is prevented through the opening 22.
  • the inflowing outside air with a low moisture content is introduced at a point where the exhaust gases are still at a temperature above the dew point, that is, at a point where no condensation can yet occur.
  • the dew point is lowered to approx. 30-40 ° C., the dew point being set in such a way that the exhaust gases do not fall below the dew point even in the fan burner 13. This risk does not exist at a dew point of 30-40 ° C.
  • the opening 22 is designed to be adjustable in order to set the dew point, that is to say to adjust the proportioning rate. This can be done, for example, by swiveling the flow guide element 23, by means of a sliding sleeve or another closure element.
  • the dew point can preferably also be regulated, that is, the opening cross section 22 is set as a function of the exhaust gas temperature in the fan burner 13 so that the dew point is slightly below the exhaust gas temperature in the fan burner 13.
  • the second exemplary embodiment shown in FIG. 2 corresponds largely the first embodiment, so that the fan burner 13 and the flame tube 14 are shown again in a simplified manner.
  • An exhaust gas recirculation channel 25 now runs from the combustion chamber 11 to the fan burner 13.
  • the suction point in the combustion chamber 11 is located next to the through opening for the flame tube 14, so that swirled exhaust gases at the flame attachment can reach the exhaust gas recirculation channel 25 and thus to the converter element 21 at its intake opening.
  • the exhaust gas recirculation channel 25 has an interrupted ring opening 26, which in turn is provided with a flow guiding element 27.
  • This flow guide element 27 can also be omitted in a simple embodiment. It is also possible to provide several openings in a staggered manner, which in turn are optionally provided with setting options, e.g. with a sliding tube that more or less closes these openings depending on their position.
  • this supply can also take place on the pressure side, for example in a manner not shown in the flame tube 14.
  • the outlet-side mouth of the exhaust gas recirculation channel 20 or 23 is designed in this case in the manner of an injector, so that the exhaust gases result the flow of the blown Air is drawn into the air flow.
  • the flame tube 30 has an inner tube wall 31 and an outer tube wall 32.
  • the fuel supply line 15 runs with the distributor nozzle 16 and the air flow of the forced-air burner 13 is guided.
  • the intermediate area between the inner tube wall 31 and the outer tube wall 32 is designed as an exhaust gas recirculation channel 33.
  • An annular converter element 34 is located at the breakthrough through the boiler wall of the boiler 10 between the inner tube wall 31 and the outer tube wall 32, so that exhaust gases are sucked into the exhaust gas recirculation channel 33 in the annular area around the inner tube wall 31.
  • the inner tube wall 31 projects into the combustion chamber 11.
  • annular opening 35 in the outer tube wall 32 serves to suck in outside air to that described above Manner and for the purpose described above.
  • annular flow guide element 36 is again provided at the ring opening 35.
  • the recirculated exhaust gases can be fed to the forced draft burner 13 either on the suction side or on the pressure side. If a pressure-side feed is provided, openings in the inner tube wall 31 with injector-like elements pointing inwards are sufficient.
  • converter element 21 of the first exemplary embodiment also apply mutatis mutandis to the other exemplary embodiments.
  • these openings or ring openings can be provided at any point in the exhaust gas recirculation channel, the only important thing being that the exhaust gas temperature at this point is not below the dew point at that point.

Landscapes

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

Claims (11)

  1. Brûleur, en particulier brûleur à air soufflé pour chaudières, installations de combustion ou similaires, comportant un dispositif d'arrivée d'air, un dispositif d'arrivée de combustible (15) introduisant un combustible liquide ou gazeux, un dispositif de flamme (14 ; 30) pénétrant dans une chambre de combustion (11), formant la flamme du brûleur et un canal de recyclage des gaz brûlés (20 ; 25 ; 33) recyclant vers le dispositif d'arrivée d'air une partie des gaz formés par la combustion, une zone du canal de recyclage des gaz brûlés (20 ; 25 ; 33) présentant, pendant le fonctionnement du brûleur (13), une température supérieure au point de rosée des gaz brûlés, et comportant au moins une ouverture d'arrivée (22 ; 26 ; 35) pour l'air extérieur, caractérisé en ce qu'il est prévu un dispositif de réglage de la section d'écoulement de l'ouverture d'arrivée (22 ; 26 ; 35) en fonction de la température minimale dans le circuit de recyclage des gaz brûlés, pour le réglage du rapport quantitatif entre le flux des gaz brûlés recyclés et le flux d'air extérieur aspiré.
  2. Brûleur selon la revendication 1, caractérisé en ce que la canal de recyclage des gaz brûlés (20 ; 25 ;33) est raccordé à la chambre de combustion (11) ou au circuit du canal des gaz brûlés (12) situé en aval.
  3. Brûleur selon la revendication 1 ou 2, caractérisé en ce que le canal de recyclage des gaz brûlés (20 ; 25 ; 33) débouche côté aspiration dans le dispositif d'arrivée d'air du brûleur (13).
  4. Brûleur selon la revendication 1 ou 2, caractérisé en ce que le canal de recyclage des gaz brûlés débouche dans le dispositif d'arrivée d'air du brûleur (13), côté pression, à la manière d'un injecteur.
  5. Brûleur selon l'une des revendications précédentes, caractérisé en ce qu'une ouverture d'arrivée (22 ; 26 ; 35) au moins est pourvue d'éléments de guidage d'écoulement (23 ; 27 ; 36).
  6. Brûleur selon l'une des revendications précédentes, caractérisé en ce que le dispositif de flamme comporte un tube de flamme (30) à double paroi au moins à l'extérieur de la chambre de combustion (11), la zone comprise entre les deux parois (31, 32) formant le canal de recyclage des gaz brûlés (33), et en ce que la paroi extérieure (32) est pourvue d'au moins une ouverture d'arrivée (35).
  7. Brûleur selon la revendication 6, caractérisé en ce que l'ouverture d'arrivée (35) s'étend en anneau autour de la paroi extérieure (32).
  8. Brûleur selon l'une des revendications précédentes, caractérisé en ce que dans le canal de recyclage des gaz brûlés (20 ; 25 ; 33) il est prévu un élément convertisseur (21 ; 34) transformant les particules solides en constituants gazeux.
  9. Brûleur selon la revendication 8, caractérisé en ce que l'élément convertisseur (21 ; 34), recouvrant sensiblement la totalité de la section transversale du canal de recyclage des gaz brûlés (20 ; 25 ; 33), est perméable à la manière d'un filtre et résiste à la chaleur au moins jusqu'à une température de 800 °C.
  10. Brûleur selon la revendication 9, caractérisé en ce que l'élément convertisseur (21 ; 34) est monté en un point du canal de recyclage des gaz brûlés (20 ; 25 ; 33), présentant, pendant le fonctionnement du brûleur (13), une température sensiblement comprise entre 400 et 600 °C.
  11. Brûleur selon la revendication 9 ou 10, caractérisé en ce que l'élément convertisseur (21 ; 34) présente une largeur de pores produisant une légère résistance à l'écoulement, supérieure au diamètre moyen des particules de poussière et de suie.
EP90123830A 1990-03-05 1990-12-11 Brûleur avec récirculation des gaz d'échappement, notamment brûleur à air soufflé Expired - Lifetime EP0445393B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4006806A DE4006806A1 (de) 1990-03-05 1990-03-05 Brenner mit abgasrueckfuehrung, insbesondere geblaesebrenner
DE4006806 1990-03-05

Publications (3)

Publication Number Publication Date
EP0445393A2 EP0445393A2 (fr) 1991-09-11
EP0445393A3 EP0445393A3 (en) 1992-03-04
EP0445393B1 true EP0445393B1 (fr) 1994-06-01

Family

ID=6401413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123830A Expired - Lifetime EP0445393B1 (fr) 1990-03-05 1990-12-11 Brûleur avec récirculation des gaz d'échappement, notamment brûleur à air soufflé

Country Status (3)

Country Link
EP (1) EP0445393B1 (fr)
AT (1) ATE106524T1 (fr)
DE (2) DE4006806A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575856A (zh) * 2017-09-26 2018-01-12 北京泷涛环境科技有限公司 一种烟气再循环锅炉***

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418537C2 (de) * 1994-05-27 1997-06-12 Daimler Benz Aerospace Ag Verfahren zum Betrieb stationärer Verbrennungsanlagen
CN210462982U (zh) * 2019-06-28 2020-05-05 浙江先创能源科技股份有限公司 一种烟气强制内循环锅炉

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2078884A (en) * 1936-07-15 1937-04-27 Micro Westco Inc Liquid fuel burner
DE2056825A1 (de) * 1970-11-19 1972-05-31 Hergt M Kombinationsverfahren zur Reinhaltung der Luft, Abgasverwertung und Abgasführung, insbesondere für Ölheizungsanlagen
DE2365186A1 (de) * 1973-12-29 1975-07-10 Elco Oelbrennerwerk Ag Verfahren und vorrichtung zum russfreien verbrennen von fluessigen brennstoffen
EP0226534A1 (fr) * 1985-10-21 1987-06-24 Battelle Memorial Institute Procédé pour alimenter un brûleur d'une chaudière en un mélange comburant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575856A (zh) * 2017-09-26 2018-01-12 北京泷涛环境科技有限公司 一种烟气再循环锅炉***

Also Published As

Publication number Publication date
DE4006806A1 (de) 1991-09-12
ATE106524T1 (de) 1994-06-15
EP0445393A2 (fr) 1991-09-11
EP0445393A3 (en) 1992-03-04
DE59005945D1 (de) 1994-07-07

Similar Documents

Publication Publication Date Title
EP0139085B1 (fr) Procédé et brûleur pour la combustion des combustibles liquides ou gazeux avec diminution de la formation de NOx
DE60105093T2 (de) Brennstoffverdünnungsverfahren und Vorrichtung zur NOx-Verminderung
EP0111874B1 (fr) Installation pour brûler la poussière de charbon
DE69821730T2 (de) Brennstoffzerstäubungsbrenner und Verbrennungsverfahren durchgeführt mit diesem Brenner
EP0164576B1 (fr) Brûleur industriel pour combustibles gazeux ou liquides
DE2358097A1 (de) Verfahren und einrichtung zur reinigung der abluft eines ofens
DE19724861C1 (de) Gasbrenner für einen Heizkessel
EP0092063B1 (fr) Générateur de vapeur
EP0445393B1 (fr) Brûleur avec récirculation des gaz d'échappement, notamment brûleur à air soufflé
EP0445413B1 (fr) Brûleur avec recirculation des gaz d'échappement, notamment brûleur à air soufflé
DE4008692C2 (de) Mischeinrichtung für Ölgebläsebrenner
DE3607676C2 (fr)
EP0078876A1 (fr) Procédé et appareil pour chauffer de l'air de combustion et de combustibles dans des installations de chauffage
DE2345838A1 (de) Brenner
DE2548067A1 (de) Verbesserungen bei der abgasverwertung bei konverteranlagen bzw. bei anlagen zum frischen von metall
EP0097315B1 (fr) Dispositif de brûleur à fuel pour fourneaux roulants
AT400980B (de) Heizkessel
EP0601018B1 (fr) Bruleur a gaz, notamment pour gaz liquefie
AT285790B (de) Verfahren zur vollständigen Verbrennung von flüssigen und gasförmigen Brennstoffen in Öfen und Feuerungsanlagen und Vorrichtung zur Durchführung dieses Verfahrens
DE3345202A1 (de) Vorrichtung zur herabsetzung der taupunkttemperatur von abgasen
DE3807214A1 (de) Brenner
DE2601591A1 (de) Brenner fuer einen ofen
DE1193191B (de) Anordnung zur Zufuehrung einer dem schwankenden Brennstoffbedarf einer Feuerung angepassten Menge fluessigen Brennstoffes
DE3444665A1 (de) Vorrichtung zur entschwefelung heisser, schadstoffhaltiger abgase
DE3104336A1 (de) "verfahren und vorrichtung zum regulieren der heisswindtemperatur in heisswinderzeugungsanlagen"

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): AT BE CH DE FR IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR IT LI

17P Request for examination filed

Effective date: 19920309

17Q First examination report despatched

Effective date: 19930209

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR IT LI

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19940601

REF Corresponds to:

Ref document number: 106524

Country of ref document: AT

Date of ref document: 19940615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59005945

Country of ref document: DE

Date of ref document: 19940707

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

26 Opposition filed

Opponent name: JOH. VAILLANT GMBH U. CO.

Effective date: 19950222

26 Opposition filed

Opponent name: JOH. VAILLANT GMBH U. CO.

Effective date: 19950222

Opponent name: WALTER DREIZLER GMBH

Effective date: 19950227

R26 Opposition filed (corrected)

Opponent name: JOH. VAILLANT GMBH U. CO. * 950227 WALTER DREIZLER

Effective date: 19950222

PLBO Opposition rejected

Free format text: ORIGINAL CODE: EPIDOS REJO

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

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

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19960815

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

Ref country code: DE

Payment date: 20010716

Year of fee payment: 12

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

Ref country code: AT

Payment date: 20011109

Year of fee payment: 12

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

Ref country code: FR

Payment date: 20011112

Year of fee payment: 12

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

Ref country code: CH

Payment date: 20011121

Year of fee payment: 12

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

Ref country code: BE

Payment date: 20011219

Year of fee payment: 12

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

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021211

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

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021231

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021231

BERE Be: lapsed

Owner name: *KLOCKNER WARMETECHNIK G.M.B.H. ZWEIGNIEDERLASSUNG

Effective date: 20021231

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030701

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO