EP0303851B1 - Procédé pour mettre en route un gazogène - Google Patents

Procédé pour mettre en route un gazogène Download PDF

Info

Publication number
EP0303851B1
EP0303851B1 EP88111829A EP88111829A EP0303851B1 EP 0303851 B1 EP0303851 B1 EP 0303851B1 EP 88111829 A EP88111829 A EP 88111829A EP 88111829 A EP88111829 A EP 88111829A EP 0303851 B1 EP0303851 B1 EP 0303851B1
Authority
EP
European Patent Office
Prior art keywords
gasifier
combustion
combustion chamber
gasification
carburetor
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
EP88111829A
Other languages
German (de)
English (en)
Other versions
EP0303851A3 (en
EP0303851A2 (fr
Inventor
Norbert Dr. Brüngel
Hermann-Josef Schumacher
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.)
Rheinbraun AG
Original Assignee
Rheinbraun 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 Rheinbraun AG filed Critical Rheinbraun AG
Publication of EP0303851A2 publication Critical patent/EP0303851A2/fr
Publication of EP0303851A3 publication Critical patent/EP0303851A3/de
Application granted granted Critical
Publication of EP0303851B1 publication Critical patent/EP0303851B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/482—Gasifiers with stationary fluidised bed
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/726—Start-up
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/093—Coal

Definitions

  • the invention relates to a method for starting a gasifier for gasifying carbon-containing fuel with the aid of oxygen-containing gasifying agent in the fluidized bed.
  • the leak test is carried out with inert gas so that oxygen-containing gas components that are still in the carburetor or in its lining despite previous inert gas purging and could lead to undesirable reactions are removed or diluted to a safe concentration.
  • the gasifier is heated without pressure to a temperature with normal gas burners, so-called bakeout burners, which corresponds at least to the later gasification temperature, for example between 800 and 1000 ° C. Reaching the heating temperature is determined by measuring the head of the carburetor.
  • the heating burners are dismantled while hot, while at the same time all supply of inert gas is switched off. At the points where the heating torches have been dismantled, the openings are then closed with blind covers. Because of the possibility of backflow of hot gases, the removal of the heating burner from the heated gasifier is only possible under great safety precautions.
  • the carburetor is flushed again with inert gas in order to expel oxygen-containing gases which may have penetrated into the carburetor when the heating burner was removed.
  • This renewed inert gas feed is still depressurized, but it is disadvantageous because the carburetor inevitably cools down.
  • the residual temperature of about 500 to 600 ° C is sufficient, however, to ignite pilot fuel, for example lignite coke, which is subsequently introduced into the gasifier and to start the gasification process while gradually adding oxygen-containing gasifying agent.
  • this object is achieved in that the carburetor is filled with an inert, gaseous medium and brought under an overpressure and, after determining the tightness, a combustible gas mixture in a combustion chamber connected to the lower part of the carburetor with the aid of an ignition device which works under pressure ignited and essentially burned while maintaining the excess pressure at least until the temperature inside the gasifier corresponds to the gasification temperature.
  • the implementation of the method is therefore dependent on the presence of an ignition device which works under pressure and is known, for example, from DE-PS 28 32 115 by the applicant.
  • the known ignition device is arranged according to the invention on a combustion chamber, which is provided on the lower part of the carburetor and is used to burn an ignitable mixture, for example of air and fuel gas. Since both the igniting of this combustible mixture and its combustion can take place under pressure, it is possible to initiate the combustion after inerting and the leak test of the carburetor without having to reduce the pressure in between. This ensures that further leaks can no longer occur due to the dismantling of parts, for example the known heating burners, and / or due to the interim lowering of the pressure on the carburetor.
  • the hot combustion gases generated in the combustion chamber are suitable for gradually heating the fuel, which is supplied in larger quantities, within the gasifier in a reducing atmosphere to the ignition temperature and thus initiating final gasification reactions.
  • the gasifier is gradually supplied with an oxygen-containing gasifying agent. In this way, the carburetor is brought to performance in a relatively short time and with great operational reliability.
  • the amount of gas mixture burned in the combustion chamber is reduced.
  • the combustion in the combustion chamber can even be switched off completely. Since the ignition flame can be generated again using the ignition device which can be switched on at any time, it is possible to switch the combustion on again if the gasification operation should be interrupted for a while.
  • a device for starting a gasifier for gasifying carbon-containing fuel with the aid of oxygen-containing gasifying agent in the fluidized bed under pressure is proposed, which is characterized in that a pressure-resistant combustion chamber for the combustion of a combustible gas mixture with a pressure-functioning ignition device with the lower one Part of the carburetor is at least temporarily connected.
  • the combustion chamber can be connected in two ways to the gasification chamber of the gasifier by means of an openable slide.
  • the combustion chamber is advantageously arranged at an acute angle to the longitudinal axis of the carburetor, because this inclination of the combustion chamber facilitates restarting.
  • the inclination of the combustion chamber is namely sure that fuel which has entered the combustion chamber from the fluidized bed and is intended for gasification can flow out of the combustion chamber again and again under the effect of gravity. If gravity alone is insufficient, the remainder is eliminated by the flow of the combustion gases that burn in the combustion chamber.
  • the figure shows the diagram of a carburetor in section.
  • the carburetor 1 is used to convert fuel 2, which is introduced into the lower part 4 of the carburetor 1 via an entry device 3 and there with the aid of oxygen-containing gasifying agent 5, which is fed to the carburetor 1 via a plurality of nozzles (not shown) Gas is implemented.
  • the conversion of the fuel 2 with the aid of the gasification agent 5 takes place within a fluidized bed 6.
  • temperatures between 800 and 1000 ° C. and pressures between 5 and 30 bar prevail within the gasifier 1.
  • a discharge 8 At the head 7 of the carburetor 1 there is the discharge 8, in the path of which a slide 9 is arranged, by means of which the gasification pressure inside the carburetor 1 can be set.
  • a discharge member 10 At the lower end of the lower part 4 of the carburetor 1, a discharge member 10 is provided, via which the non-convertible components 11 of the fuel 2 are drawn off.
  • a combustion chamber 13 is connected, which with the Carburetor 1 is permanently connected and is optionally separated from the carburetor 1 by a lockable slide 14.
  • a combustible gas mixture 15 is burned, which consists for example of natural gas, product gas or a mixture of CO / H2.
  • the combustion takes place under pressure with the help of oxygen 16 or air, and by adjusting the proportions between the gases 15 and 16 it is ensured that only a partial combustion of the fuel gas 15 can take place and an excess of oxygen is avoided.
  • the combustion in the connected combustion chamber 13 takes place continuously and the occurrence of explosive gas mixtures is thereby excluded.
  • An ignition device 17 such as is described in detail in DE-PS 28 32 115, is used to ignite the combustion within the combustion chamber 13. With the help of this ignition device 17 it is possible to keep the combustion in the combustion chamber 13 under pressure and to start it up again at any time.
  • a gas mixture is used which is characterized by a lack of oxygen and is therefore not explosive.
  • this fuel gas is burned, an unburned excess remains, which can be discharged at the outlet 8 of the gasifier 1 into a heating gas system or power plant (not shown) and can be completely burned there.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Feeding And Controlling Fuel (AREA)

Claims (7)

1. Procédé pour mettre en route un gazogène, pour gazéifier un combustible contenant du carbone à l'aide d'un agent de gazéification contenant de l'oxygène, en opérant dans un lit fluidisé, caractérisé en ce qu'on remplit le gazogène d'un fluide gazeux inerte que l'on met en surpression, en ce que, après avoir vérifié l'étanchéité, on provoque l'inflammation d'un mélange gazeux combustible dans une chambre de combustion reliée à la partie inférieure du gazogène, à l'aide d'un dispositif d'allumage fonctionnant sous pression, et en ce qu'on poursuit cette combustion en maintenant sensiblement la surpression jusqu'à ce que la température de l'intérieur du gazogène corresponde à la température de gazéification.
2. Procédé selon la revendication 1, caractérisé en ce qu'on fait arriver dans le gazogène un débit croissant de combustible pendant la combustion du mélange gazeux.
3. Procédé selon la revendication 2, caractérisé en ce qu'on fait arriver dans le gazogène un débit croissant de l'agent de gazéification pendant la combustion du mélange gazeux.
4. Procédé selon la revendication 1, caractérisé en ce qu'on interrompt la combustion du mélange gazeux dans la chambre de combustion pendant la gazéification du mélange gazeux dans le gazogène, ou jusqu'à ce que s'établisse une flamme d'allumage à l'endroit du dispositif d'allumage.
5. Dispositif de mise en route d'un gazogène, pour gazéifier un combustible contenant du carbone à l'aide d'un agent de gazéification contenant de l'oxygène, en opérant sous pression dans un lit fluidisé, caractérisé en ce qu'il comporte une chambre de combustion (13) à l'épreuve de la pression pour brûler un mélange gazeux combustible (15, 16), associée à un dispositif d'allumage (17) qui fonctionne sous pression et qui est relié au moins temporairement à la partie inférieure (4) du gazogène (1).
6. Dispositif selon la revendication 5, caractérisé en ce que la chambre de combustion (13) est reliée au gazogène (1) par l'intermédiaire d'une vanne à tiroir (14) pouvant être ouverte à la demande.
7. Dispositif selon l'une des revendications 5 ou 6, caractérisé en ce que la chambre de combustion (13) est disposée suivant un angle aigu par rapport à l'axe longitudinal du gazogène (1).
EP88111829A 1987-08-14 1988-07-22 Procédé pour mettre en route un gazogène Expired - Lifetime EP0303851B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3727146A DE3727146C1 (de) 1987-08-14 1987-08-14 Verfahren zum Anfahren eines Vergasers
DE3727146 1987-08-14

Publications (3)

Publication Number Publication Date
EP0303851A2 EP0303851A2 (fr) 1989-02-22
EP0303851A3 EP0303851A3 (en) 1989-10-18
EP0303851B1 true EP0303851B1 (fr) 1991-06-19

Family

ID=6333771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111829A Expired - Lifetime EP0303851B1 (fr) 1987-08-14 1988-07-22 Procédé pour mettre en route un gazogène

Country Status (6)

Country Link
US (1) US4881949A (fr)
EP (1) EP0303851B1 (fr)
CN (1) CN1031249A (fr)
DE (2) DE3727146C1 (fr)
ES (1) ES2022549B3 (fr)
GR (1) GR3002165T3 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2582498B2 (ja) * 1990-07-30 1997-02-19 イー・アイ・デュポン・ドゥ・ヌムール・アンド・カンパニー 水現像可能な前着色されたジアゾ画像形成用エレメント
DE4035293C1 (fr) * 1990-11-07 1992-01-02 Metallgesellschaft Ag, 6000 Frankfurt, De
AT395435B (de) * 1991-02-19 1992-12-28 Voest Alpine Ind Anlagen Verfahren zur inbetriebnahme einer anlage zur herstellung von roheisen oder stahlvormaterial, sowie anlage zur durchfuehrung des verfahrens
DE4113857A1 (de) * 1991-04-27 1992-10-29 Krupp Koppers Gmbh Verfahren zum zuenden eines vergasungsreaktors
DE4339973C1 (de) * 1993-11-24 1995-07-13 Rheinische Braunkohlenw Ag Verfahren zur Vergasung von Abfallstoffen
US5516345A (en) * 1994-06-30 1996-05-14 Iowa State University Research Foundation, Inc. Latent heat-ballasted gasifier method
US6647903B2 (en) * 2000-09-14 2003-11-18 Charles W. Aguadas Ellis Method and apparatus for generating and utilizing combustible gas
US7909899B2 (en) * 2005-06-28 2011-03-22 Community Power Corporation Method and apparatus for automated, modular, biomass power generation
US20090207790A1 (en) * 2005-10-27 2009-08-20 Qualcomm Incorporated Method and apparatus for settingtuneawaystatus in an open state in wireless communication system
DE202006020601U1 (de) * 2006-06-28 2009-03-05 Siemens Aktiengesellschaft Vorrichtung für Flugstrom-Vergasungsreaktoren hoher Leistung mit Kombinationsbrenner und Mehrbrenneranordnung
DE102007021926A1 (de) * 2007-05-10 2008-11-20 Siemens Ag Öl-/Slurrybrenner mit Injektionszerstäubung
US8945507B2 (en) * 2011-04-21 2015-02-03 Kellogg Brown & Root Llc Systems and methods for operating a gasifier
US8673181B2 (en) * 2011-08-11 2014-03-18 Kellogg Brown & Root Llc Systems and methods for starting up a gasifier
US9388980B2 (en) 2011-12-15 2016-07-12 Kellogg Brown + Root LLC Systems and methods for gasifying a hydrocarbon feedstock
CN103113921A (zh) * 2013-02-05 2013-05-22 贵州开阳化工有限公司 快速提升气化系统温度及压力的方法
DE102013101368B4 (de) * 2013-02-12 2023-04-27 Gidara Energy B.V. Wirbelschichtvergaser
JP5627724B2 (ja) 2013-02-13 2014-11-19 三菱日立パワーシステムズ株式会社 ガス化炉の起動方法、ガス化炉及びガス化複合発電設備
DE102014108673A1 (de) * 2014-06-20 2015-12-24 L’AIR LIQUIDE Société Anonyme pour l’Etude et l’Exploitation des Procédés Georges Claude Verfahren zum Aufheizen und Vergasen eines kohlenstoffhaltigen Brennstoffs
US20230159329A1 (en) * 2020-06-22 2023-05-25 Praxair Technology, Inc. Startup methods for oxidation reactor

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1981299A (en) * 1933-09-01 1934-11-20 Grove W Harris Lighter for gaseous fuel burners
US2318195A (en) * 1939-11-01 1943-05-04 Fulton Sylphon Co Ignition system
US2411040A (en) * 1943-04-07 1946-11-12 Galvin Mfg Corp Liquid fuel preparing apparatus
US2655443A (en) * 1948-03-02 1953-10-13 Texas Co Synthesis gas generation
US2938577A (en) * 1956-10-04 1960-05-31 Air Reduction Method and apparatus for preventing backfire in gas burner systems
US3248178A (en) * 1964-05-06 1966-04-26 Cornell Hoskinson Mfg Waste products combustion apparatus
US3485565A (en) * 1967-05-16 1969-12-23 Packard Instrument Co Inc Combustion apparatus,particularly for preparation of samples for radioactive isotope tracer studies
DE2306840C3 (de) * 1973-02-12 1980-04-24 Aloys 4290 Bocholt Reuke Brenner für leicht- und schwerflüssiges Heizöl sowie fließfähige Fette
US4017272A (en) * 1975-06-05 1977-04-12 Bamag Verfahrenstechnik Gmbh Process for gasifying solid carbonaceous fuel
DE2832115C2 (de) * 1978-07-21 1985-05-09 Rheinische Braunkohlenwerke AG, 5000 Köln Zündvorrichtung für ein in einem Brennraum zu verbrennendes Gasgemisch
DE2856609A1 (de) * 1978-12-29 1980-07-17 Rheinische Braunkohlenw Ag Reaktor zum vergasen von festen, kohlenstoffhaltigen materialien
DD152790A1 (de) * 1980-08-27 1981-12-09 Lutz Groeschel Verfahren zur in-und ausserbetriebnahme von staubvergasungsanlagen
ZA848320B (en) * 1983-11-05 1985-06-26 Rheinische Braunkohlenw Ag Process and fluidised bed reactor for the gasification of carbonaceous solids

Also Published As

Publication number Publication date
DE3863326D1 (de) 1991-07-25
EP0303851A3 (en) 1989-10-18
CN1031249A (zh) 1989-02-22
EP0303851A2 (fr) 1989-02-22
DE3727146C1 (de) 1988-09-22
ES2022549B3 (es) 1991-12-01
GR3002165T3 (en) 1992-12-30
US4881949A (en) 1989-11-21

Similar Documents

Publication Publication Date Title
EP0303851B1 (fr) Procédé pour mettre en route un gazogène
DE69217452T2 (de) Vorrichtung zur Abfallverbrennung
DE3047148A1 (de) "verfahren und vorrichtung zur gewinnung von energie aus heizwertarmem gas"
DE3022096A1 (de) Vorrichtung zum beschicken eines wirbelbett-verbrennungsofens und verfahren zum selbsttaetigen betreiben desselben
DE3705406C2 (fr)
DE4013739A1 (de) Verfahren zur inbetriebnahme von vergasungsreaktoren
EP0564964A1 (fr) Procédé pour la destruction des substances toxiques produites pendant l'élimination des dechets organiques
EP2703716B1 (fr) Chauffage d'un gaz d'échappement de processus
DE2756138B2 (de) Zündvorrichtung für Flugstromvergaser
EP0511479B1 (fr) Procédé pour l'allumage d'un réacteur de gaséification
DE82409C (fr)
EP0157263A2 (fr) Procédé pour la combustion des combustibles inférieurs
DE1137266B (de) Verfahren und Einrichtung zur Verbrennung von schwachmethanhaltigen Gasgemischen, insbesondere Grubenwettern
DE3537388C2 (fr)
DE2354513C3 (de) Verfahren zur thermischen Behandlung von verunreinigten Salzlösungen
DE970377C (de) Verfahren und Vorrichtung zur Vergasung schwer verbrennbarer, fluessiger oder verfluessigbarer Stoffe
EP0155598A2 (fr) Procédé de gazéification souterraine de charbon
DE3227155A1 (de) Verfahren und vorrichtung zur zuendung von brennern in feuerungs- oder vergasungsraeumen
DE570609C (de) Verfahren zur Herstellung von Russ
DD152790A1 (de) Verfahren zur in-und ausserbetriebnahme von staubvergasungsanlagen
DE183915C (fr)
DD257280A1 (de) Kombinierter zyklon-wirbelschicht-reaktor
DE1671326C (de) Auf einem Füllwagen angeordnete Ein richtung zur Zündung der beim Füllen von Koksofen entstehenden Fullgase
DE1955499C3 (de) Verfahren zum Brennen von Kalkstein
DD213983A1 (de) Selbstzuendender druckbrenner zur vergasung von brenngas

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 ES GB GR SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES GB GR SE

17P Request for examination filed

Effective date: 19900410

17Q First examination report despatched

Effective date: 19901017

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

Owner name: RHEINBRAUN AKTIENGESELLSCHAFT

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES GB GR SE

REF Corresponds to:

Ref document number: 3863326

Country of ref document: DE

Date of ref document: 19910725

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
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
REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3002165

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

Ref country code: GB

Payment date: 19920911

Year of fee payment: 5

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

Ref country code: SE

Payment date: 19920918

Year of fee payment: 5

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

Ref country code: ES

Payment date: 19920923

Year of fee payment: 5

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

Ref country code: DE

Payment date: 19920924

Year of fee payment: 5

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

Ref country code: GR

Payment date: 19920930

Year of fee payment: 5

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

Ref country code: GB

Effective date: 19930722

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

Ref country code: SE

Effective date: 19930723

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19930723

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

Ref country code: GR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940131

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930722

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

Ref country code: DE

Effective date: 19940401

REG Reference to a national code

Ref country code: GR

Ref legal event code: MM2A

Free format text: 3002165

EUG Se: european patent has lapsed

Ref document number: 88111829.3

Effective date: 19940210

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990601