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ES2099983T5 - Procedimiento y aparato para el funcionamiento de un sistema reactor de lecho fluidizado circulante. - Google Patents

Procedimiento y aparato para el funcionamiento de un sistema reactor de lecho fluidizado circulante.

Info

Publication number
ES2099983T5
ES2099983T5 ES93924631T ES93924631T ES2099983T5 ES 2099983 T5 ES2099983 T5 ES 2099983T5 ES 93924631 T ES93924631 T ES 93924631T ES 93924631 T ES93924631 T ES 93924631T ES 2099983 T5 ES2099983 T5 ES 2099983T5
Authority
ES
Spain
Prior art keywords
solid particles
combustion chamber
chamber
heat exchanger
return duct
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
ES93924631T
Other languages
English (en)
Other versions
ES2099983T3 (es
Inventor
Timo Hyppanen
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.)
Amec Foster Wheeler Energia Oy
Original Assignee
Foster Wheeler Energia Oy
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=27488735&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2099983(T5) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US07/973,396 external-priority patent/US5341766A/en
Priority claimed from US08/041,571 external-priority patent/US5332553A/en
Priority claimed from US08/089,810 external-priority patent/US5840258A/en
Application filed by Foster Wheeler Energia Oy filed Critical Foster Wheeler Energia Oy
Publication of ES2099983T3 publication Critical patent/ES2099983T3/es
Application granted granted Critical
Publication of ES2099983T5 publication Critical patent/ES2099983T5/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/26—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1836—Heating and cooling the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/38—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it
    • B01J8/384—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it being subject to a circulatory movement only
    • B01J8/388—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it being subject to a circulatory movement only externally, i.e. the particles leaving the vessel and subsequently re-entering it
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed
    • F22B31/0084—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed with recirculation of separated solids or with cooling of the bed particles outside the combustion bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed
    • F22B31/0084—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed with recirculation of separated solids or with cooling of the bed particles outside the combustion bed
    • F22B31/0092—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed with recirculation of separated solids or with cooling of the bed particles outside the combustion bed with a fluidized heat exchange bed and a fluidized combustion bed separated by a partition, the bed particles circulating around or through that partition
    • 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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
    • F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
    • F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
    • F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00026—Controlling or regulating the heat exchange system
    • B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
    • B01J2208/00044—Temperature measurement
    • B01J2208/00061—Temperature measurement of the reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00026—Controlling or regulating the heat exchange system
    • B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
    • B01J2208/00079—Fluid level measurement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00026—Controlling or regulating the heat exchange system
    • B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
    • B01J2208/00088—Flow rate measurement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00115—Controlling the temperature by indirect heat exchange with heat exchange elements inside the bed of solid particles
    • B01J2208/00132—Tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
    • B01J2208/00212—Plates; Jackets; Cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00327—Controlling the temperature by direct heat exchange
    • B01J2208/00336—Controlling the temperature by direct heat exchange adding a temperature modifying medium to the reactants
    • B01J2208/00353—Non-cryogenic fluids
    • B01J2208/00371—Non-cryogenic fluids gaseous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00477—Controlling the temperature by thermal insulation means
    • B01J2208/00495—Controlling the temperature by thermal insulation means using insulating materials or refractories
    • 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 
    • F23C2206/00—Fluidised bed combustion
    • F23C2206/10—Circulating fluidised bed
    • F23C2206/101—Entrained or fast fluidised bed
    • 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 
    • F23C2206/00—Fluidised bed combustion
    • F23C2206/10—Circulating fluidised bed
    • F23C2206/103—Cooling recirculating particles

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

UN SISTEMA DE LECHO FLUIDIZADO EN CIRCULACION (CFB) Y UN METODO DE FUNCIONAMIENTO DEL MISMO, TIENE UN ZONA DE TRANSFERENCIA DE CALOR QUE CONTIENE GAS DE FLUIDIZACION LIMPIO PRIMARIAMENTE, LO QUE PROPORCIONA CONDICIONES VENTAJOSAS PARA UN SUPERCALENTAMIENTO, MIENTRAS QUE PROPORCIONA UN FLUJO BASTANTE GRANDE DE MATERIAL SOLIDO EN LA CAMARA CAMBIADORA DE CALOR DURANTE LAS CONDICIONES DE CARGA ALTA Y DE CARGA BAJA, PARA LOGRAR LA CAPACIDAD DE TRANSFERENCIA DE CALOR DESEADA. LA CAMARA CAMBIADORA DE CALOR (38) ESTA SITUADA CERCA DE LA PARTE INFERIOR DE UN CONDUCTO DE RETORNO (16), CONECTADO ENTRE EL SEPARADOR DE PARTICULAS (14) Y LA CAMARA DE COMBUSTION (12) DEL CFB, CON UNA PARED COMUN (22A) QUE SEPARA LAS CAMARAS DE COMBUSTION Y CAMBIADORA DE CALOR. LAS PARTICULAS SON REINTRODUCIDAS EN LA CAMARA DE COMBUSTION A TRAVES DE UNA ENTRADA PARA PARTICULAS SOLIDAS (42) EN LA PARED COMUN, Y LAS PARTICULAS PUEDEN PASAR DIRECTAMENTE DESDE LA CAMARA DE COMBUSTION HACIA DENTRO DE LA CAMARA CAMBIADORA DE CALOR A TRAVES DE UN PASAJE (52) EN LA PARED COMUN POR ENCIMA DE LA ENTRADA DE PARTICULAS SOLIDAS. TAMBIEN PUEDE ESTAR PREVISTA UNA ENTRADA PARA GAS (56) EN LA PARED COMUN, POR ENCIMA DEL PASAJE, PARA PERMITIR QUE EL GAS DE FLUIDIZACION PROCEDENTE DE LA CAMARA CAMBIADORA DE CALOR FLUYA DESDE LA CAMARA CAMBIADORA DE CALOR HACIA DENTRO DE LA CAMARA DE COMBUSTION. LA ENTRADA PARA PARTICULAS SOLIDAS (42) PUEDE COMPRENDER UNA SERIE DE RANURAS ESTRECHAS, HORIZONTALES, ALARGADAS, DIPUESTAS VERTICALMENTE (44).
ES93924631T 1992-11-10 1993-11-09 Procedimiento y aparato para el funcionamiento de un sistema reactor de lecho fluidizado circulante. Expired - Lifetime ES2099983T5 (es)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US07/973,396 US5341766A (en) 1992-11-10 1992-11-10 Method and apparatus for operating a circulating fluidized bed system
US08/041,571 US5332553A (en) 1993-04-05 1993-04-05 Method for circulating solid material in a fluidized bed reactor
US08/089,810 US5840258A (en) 1992-11-10 1993-07-12 Method and apparatus for transporting solid particles from one chamber to another chamber
US08/124,767 US5425412A (en) 1992-11-10 1993-09-22 Method and apparatus for operating a circulating fluidized bed reactor system

Publications (2)

Publication Number Publication Date
ES2099983T3 ES2099983T3 (es) 1997-06-01
ES2099983T5 true ES2099983T5 (es) 2002-08-16

Family

ID=27488735

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93924631T Expired - Lifetime ES2099983T5 (es) 1992-11-10 1993-11-09 Procedimiento y aparato para el funcionamiento de un sistema reactor de lecho fluidizado circulante.

Country Status (12)

Country Link
EP (1) EP0667945B2 (es)
JP (1) JP3101631B2 (es)
CN (1) CN1035416C (es)
AT (1) ATE148545T1 (es)
CA (1) CA2149049C (es)
DE (1) DE69307918T3 (es)
DK (1) DK0667945T4 (es)
ES (1) ES2099983T5 (es)
FI (1) FI109935B (es)
GR (1) GR3023248T3 (es)
PL (1) PL173605B1 (es)
WO (1) WO1994011674A1 (es)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5526775A (en) † 1994-10-12 1996-06-18 Foster Wheeler Energia Oy Circulating fluidized bed reactor and method of operating the same
DE102005005796A1 (de) * 2005-02-09 2006-08-17 Applikations- Und Technikzentrum Für Energieverfahrens-, Umwelt- Und Strömungstechnik (Atz-Evus) Verfahren und Vorrichtung zur thermochemischen Umsetzung eines Brennstoffs
CN100447102C (zh) * 2005-07-08 2008-12-31 中国科学院工程热物理研究所 粒子干燥器
KR100826535B1 (ko) 2007-02-20 2008-05-02 엘지전자 주식회사 필터 청소장치 및 이를 구비한 덕트리스 건조기
FI122778B (fi) 2008-03-31 2012-06-29 Metso Power Oy Pyrolyysimenetelmä kattilan yhteydessä ja pyrolyysilaitteisto
FI122858B (fi) * 2008-03-31 2012-08-15 Metso Power Oy Menetelmä pyrolyysin suorittamiseksi ja pyrolyysilaitteisto
CN101696798B (zh) * 2009-05-18 2011-05-04 西安热工研究院有限公司 带有异型分隔墙的紧凑型循环流化床锅炉
FI123548B (fi) * 2010-02-26 2013-06-28 Foster Wheeler Energia Oy Leijupetireaktorijärjestely
US20110226195A1 (en) * 2010-03-18 2011-09-22 Foster Wheeler North America Corp. Wall Construction for a Boiler Arrangement
KR101993226B1 (ko) 2012-12-31 2019-06-26 엘지전자 주식회사 의류처리장치
EP2884162A1 (en) * 2013-12-16 2015-06-17 Doosan Lentjes GmbH Fluidized bed heat exchanger
RS56059B1 (sr) * 2015-02-04 2017-09-29 Doosan Lentjes Gmbh Izmenjivač toplote sa fluidizovanim slojem

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457289A (en) * 1982-04-20 1984-07-03 York-Shipley, Inc. Fast fluidized bed reactor and method of operating the reactor
US4594967A (en) * 1985-03-11 1986-06-17 Foster Wheeler Energy Corporation Circulating solids fluidized bed reactor and method of operating same
ATE87077T1 (de) * 1985-06-12 1993-04-15 Metallgesellschaft Ag Verbrennungsvorrichtung mit zirkulierender wirbelschicht.
SE457661B (sv) * 1986-06-12 1989-01-16 Lars Axel Chambert Saett och reaktor foer foerbraenning i fluidiserad baedd
SE455726B (sv) * 1986-12-11 1988-08-01 Goetaverken Energy Ab Forfarande vid reglering av kyleffekten i partikelkylare samt partikelkylare for pannor med cirkulerande fluidiserad bedd
US4896717A (en) * 1987-09-24 1990-01-30 Campbell Jr Walter R Fluidized bed reactor having an integrated recycle heat exchanger
DK120288D0 (da) * 1988-03-04 1988-03-04 Aalborg Boilers Fluidbed forbraendigsreaktor samt fremgangsmaade til drift af en fluidbed forbraendingsreaktor
FR2661113B1 (fr) * 1990-04-20 1993-02-19 Stein Industrie Dispositif de realisation d'une reaction entre un gaz et un materiau solide divise dans une enceinte.
US5069171A (en) * 1990-06-12 1991-12-03 Foster Wheeler Agency Corporation Fluidized bed combustion system and method having an integral recycle heat exchanger with a transverse outlet chamber

Also Published As

Publication number Publication date
DK0667945T3 (da) 1997-08-18
DK0667945T4 (da) 2002-04-22
EP0667945A1 (en) 1995-08-23
GR3023248T3 (en) 1997-07-30
FI952155A (fi) 1995-07-06
JP3101631B2 (ja) 2000-10-23
JPH08503541A (ja) 1996-04-16
DE69307918T2 (de) 1997-06-12
DE69307918D1 (de) 1997-03-13
WO1994011674A1 (en) 1994-05-26
CA2149049C (en) 1999-07-06
ATE148545T1 (de) 1997-02-15
CN1035416C (zh) 1997-07-16
DE69307918T3 (de) 2003-01-23
FI109935B (fi) 2002-10-31
EP0667945B2 (en) 2002-01-02
PL308953A1 (en) 1995-09-04
PL173605B1 (pl) 1998-03-31
EP0667945B1 (en) 1997-01-29
FI952155A0 (fi) 1995-05-05
ES2099983T3 (es) 1997-06-01
CN1088480A (zh) 1994-06-29
CA2149049A1 (en) 1994-05-26

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