EP0568448B1 - Réacteur à lit fluidisé circulant comportant des échangeurs extérieurs alimentés par la recirculation interne - Google Patents
Réacteur à lit fluidisé circulant comportant des échangeurs extérieurs alimentés par la recirculation interne Download PDFInfo
- Publication number
- EP0568448B1 EP0568448B1 EP93401095A EP93401095A EP0568448B1 EP 0568448 B1 EP0568448 B1 EP 0568448B1 EP 93401095 A EP93401095 A EP 93401095A EP 93401095 A EP93401095 A EP 93401095A EP 0568448 B1 EP0568448 B1 EP 0568448B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reactor
- internal
- external
- zone
- lower zone
- 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
Links
- 238000005243 fluidization Methods 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 239000000446 fuel Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 7
- 230000005587 bubbling Effects 0.000 claims 4
- 239000002803 fossil fuel Substances 0.000 claims 1
- 239000011343 solid material Substances 0.000 abstract description 21
- 239000000463 material Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 11
- 238000009434 installation Methods 0.000 description 7
- 208000031968 Cadaver Diseases 0.000 description 4
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 3
- 240000008042 Zea mays Species 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KRQUFUKTQHISJB-YYADALCUSA-N 2-[(E)-N-[2-(4-chlorophenoxy)propoxy]-C-propylcarbonimidoyl]-3-hydroxy-5-(thian-3-yl)cyclohex-2-en-1-one Chemical compound CCC\C(=N/OCC(C)OC1=CC=C(Cl)C=C1)C1=C(O)CC(CC1=O)C1CCCSC1 KRQUFUKTQHISJB-YYADALCUSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- 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 of dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of 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 of 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
- 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
-
- 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
- F23C10/12—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 exclusively within the combustion zone
-
- 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
Definitions
- the circulating fluidized bed reactor is used today in thermal power plants and for ever higher powers.
- the greatest power in service is 150 megawatts electric.
- the external exchanger is supplied by a siphon preceded by a cyclone separating the solids discharged at the top of the upper zone of the reactor.
- This external exchanger placed below the cyclone and the siphon is attached to the lower part of the lower zone, which has the drawback of preventing the injection of secondary air on one of the main faces of the reactor, thus limiting the distance between front and rear face of the reactor, therefore its power for a given rear face length.
- the third is that indicated by STEIN INDUSTRIE in its European patent application No. EP-A-0 453 373, characterized by a drop in speed of the fluidization gases inside the reactor itself when passing a dense fluidized bed installed at an intermediate level of the reactor.
- This drop in speed obtained thanks to a significant and quantified variation in the section of the reactor (ratio between 1.2 and 2) aims to improve combustion thanks to an increase in the recirculation of solid materials in the lower part of the reactor. .
- This third type of reactor makes it possible, thanks to the existence of a heat exchanger in this internal dense fluidized bed, to reduce the exchange power of the internal panels of the first type of circulating fluidized bed or of the external exchangers of the second type of fluidized bed. circulating, but it does not generally make it possible to remove them, for high power units.
- the present invention relates to a circulating fluidized bed reactor comprising a lower fluidized bed zone in rapid circulation provided with a fluidization grid, primary air inlet means below the grid, and injection means of secondary air above the grid, an upper zone with a fast circulating fluidized bed surrounded by reactor walls provided with cooling tubes, means for introducing fuel into the lower zone, one or more dense internal fluidized beds installed at the upper part of the lower zone on one or more faces of the reactor and making it possible to collect on the one hand the solids falling along the walls of the upper zone and on the other hand those originating from the fall in speed of the fluidization gases when passing through the internal dense fluidized bed or beds, the ratio of the cross section of the upper zone to that of the lower zone at the level of the internal bed or beds being between 1.05 and 2, the overflow of solid matter from this or these last beds being discharged into the lower zone.
- the reactor according to the invention can easily be of limited height.
- FIG. 1 schematically represents a front view of the reactor according to the invention.
- FIG. 2 schematically represents a top view of the reactor of FIG. 1.
- FIG. 3 schematically represents a side view of the reactor of FIG. 1.
- FIG. 4 schematically represents a vertical view of the reactor of FIG. 1, according to IV-IV of FIG. 2.
- FIG. 5 schematically represents an enlarged and partial view of the reactor of FIG. 1, according to V-V of FIG. 2.
- FIG. 6 schematically represents another partial vertical view of the reactor of FIG. 1, according to VI-VI of FIG. 2.
- FIGS. 7A, 7B, 7C schematically represent a variant of the reactor according to the invention, respectively a side view, a top view and a front view.
- FIGS. 8A, 8B, 8C schematically show a second variant of the reactor according to the invention.
- FIGS. 9A, 9B, 9C schematically represent a third variant of the reactor according to the invention.
- FIG. 10 schematically represents a variant in front view of a reactor according to the invention suitable for high power and comprising a lower zone divided into two parts.
- FIG. 11 schematically represents a top view of the reactor of FIG. 10.
- FIG. 12 schematically represents a side view of the reactor of FIG. 10.
- FIG. 13 schematically represents an enlarged partial view of the reactor of FIG. 10.
- FIG. 14 represents a water-steam diagram of the installation of which the reactor of FIG. 10 is a part.
- FIGS. 1 to 6 The circulating fluidized bed reactor, object of the invention, and intended for the combustion of carbonaceous materials is shown in FIGS. 1 to 6.
- FIGS. 7, 8, 9 the arrangement of the internal dense fluidized beds 22, 23 and the external exchangers 18, 19, 20, 21 shown in FIGS. 1 to 6 may vary. Other nonlimiting examples involving the number or the relative situation of these devices are shown in FIGS. 7, 8, 9.
- the internal dense fluidized beds 22 and 23 and the external exchangers 18, 19, 20, 21 are on the same faces; in FIG. 8, the external exchangers 18 and 19 are installed on a single lateral face, the internal dense beds 22 and 23 being always installed on the front and rear faces; in FIG. 9, there is only one external exchanger 18 installed on a side face and an internal dense bed 22 installed on the front face.
- the main interest of this new circulating fluidized bed reactor is to be able to install, thanks to the simplification of the connections, the external exchangers 18, 19, 20, 21 at a level such that the lower zone 3 of the reactor is freed from both these external exchangers 18, 19, 20, 21 and their connection with the reactor and therefore fully available to design and install the circuits which concern combustion (primary air, secondary air) and the return of solid materials from cyclones 7 installed at the outlet of the reactor.
- This feature allows extrapolation to large powers as shown in the example below.
- a high power circulating fluidized bed reactor (300 megawatts electric) is shown in Figures 10, 11, 12 and 13.
- the thermal power exchanged is around 750 MW, broken down into 450 MW for the exchange with the internal tubular walls of the reactor (125 MW) and the external exchangers (325 MW), and 300 MW for the exchangers located in the envelope 4 and the air heaters 15.
- the lower zone 3 is divided into two parts 3A and 3B which makes it possible to divide the width between the side faces 24 and 25 in two.
- the width is a factor limiting the penetration of the secondary air jets 13 necessary for the production good combustion.
- the primary air circuits 12, secondary 13 and the returns 9 of solid materials from the cyclones 7 are optimally arranged around the lower parts 3A and 3B by virtue of the installation in accordance with the principles set out in the preceding paragraphs of two dense fluidized beds internal 22 and 23 installed against the left and right side walls 24, 25 of the reactor and four external exchangers 18, 19, 20 and 21 attached to the outside of the reactor on the front and rear faces 34, 35, supplied with solid material by fluidized pipes 46, 47, 48, 49.
- Each of the four exchangers 18, 19, 20, 21 is divided into two (18A, 18B etc 7) by a central partition 50, 51, 52, 53, open at its upper part to allow the supply of solid matter from the downstream part by overflow.
- the exchanger 18 is divided into two parts 18A and 18B, the part 18A is supplied from the internal dense fluidized bed 22 by the pipe 46, the part 18B is supplied by overflow at above the vertical partition 50, the upper level of which corresponds to 40A (FIG. 13), the solid matter falling into the lower part 3A of the reactor through the window 42, the lower level of which fixes the height of the fluidized bed of the part. 18B.
- the internal dense fluidized beds 22 and 23 are equipped with fluidization grids 30, 31 through which the inert fluidization gases are blown by means 32, 33.
- the external exchangers such as 18A, 18B, 20A, 20B, are equipped with fluidizing grids such as 36A, 36B, 37A, 37B through which fluidizing air is blown by means such as 38A, 38B, 39A, 39B etc ...
- Figure 10 are shown the positions of the evaporator 56 consisting of the tubes 4 arranged as shown in Figure 1, on the inner walls of the reactor and those of the high temperature superheater 60, the low temperature reheater 61 and the economizer 55 in envelope 14.
- FIG. 11 shows the arrangement of the devices in the external exchangers 18, 19, 20, 21 attached to the intermediate height of the reactor: the medium temperature superheaters 59 and evaporators 57 respectively in the external exchangers 20A and 21A, 20B and 21B, the high superheaters temperature 62 and low temperature superheaters 58 respectively in the external exchangers 18A and 19A, 18B and 19B.
- the heat exchange between solid materials and vapor in the external exchangers 20 and 21 makes it possible to adjust the temperature of the reactor to 850 ° C. for example.
- the heat exchange between solids and steam in the exchangers 18 and 19 makes it possible to adjust the temperature of the reheated steam to the chosen set value, 565 ° C. for example.
- FIG. 10 clearly shows that the entire lower zone of the reactor is divided into two parts, each of which can be equipped, without any constraint due to the external exchangers, with its combustion circuits, in particular two or more levels of secondary air on its eight faces and returns of the four cyclones on its side faces.
- each lower part 3A or 3B corresponds to a circulating fluidized bed reactor of 150 megawatts electric.
- the example above corresponds to a power of 300 megawatts of electricity but a reactor according to the invention can be produced for a higher power, for example 600 megawatts of electricity by increasing the length of the lateral faces and the surface of the external exchangers on the front faces. and back.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- External Artificial Organs (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9205165 | 1992-04-27 | ||
| FR929205165A FR2690512B1 (fr) | 1992-04-27 | 1992-04-27 | Réacteur à lit fluidisé circulant comportant des échangeurs extérieurs alimentés par la recirculation interne. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0568448A1 EP0568448A1 (fr) | 1993-11-03 |
| EP0568448B1 true EP0568448B1 (fr) | 1996-09-18 |
Family
ID=9429284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93401095A Expired - Lifetime EP0568448B1 (fr) | 1992-04-27 | 1993-04-27 | Réacteur à lit fluidisé circulant comportant des échangeurs extérieurs alimentés par la recirculation interne |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US5508007A (es) |
| EP (1) | EP0568448B1 (es) |
| JP (1) | JPH0694201A (es) |
| CN (1) | CN1051369C (es) |
| AT (1) | ATE143118T1 (es) |
| CA (1) | CA2094860A1 (es) |
| CZ (1) | CZ285056B6 (es) |
| DE (1) | DE69304777T2 (es) |
| DK (1) | DK0568448T3 (es) |
| ES (1) | ES2092244T3 (es) |
| FI (1) | FI931839A (es) |
| FR (1) | FR2690512B1 (es) |
| GR (1) | GR3021923T3 (es) |
| MX (1) | MX9302383A (es) |
| PL (1) | PL171124B1 (es) |
| RO (1) | RO111033B1 (es) |
| RU (1) | RU2104442C1 (es) |
| ZA (1) | ZA932943B (es) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994022571A1 (en) † | 1993-04-05 | 1994-10-13 | A. Ahlstrom Corporation | A fluidized bed reactor system and a method of manufacturing the same |
| US5660125A (en) * | 1995-05-05 | 1997-08-26 | Combustion Engineering, Inc. | Circulating fluid bed steam generator NOx control |
| FR2735041B1 (fr) * | 1995-06-07 | 1997-07-11 | Gec Alsthom Stein Ind | Reacteur a lits fluidises pour le traitement thermique des dechets |
| US6139805A (en) * | 1995-11-15 | 2000-10-31 | Ebara Corporation | Fluidized-bed reactor |
| JPH10253011A (ja) * | 1997-03-13 | 1998-09-25 | Hitachi Zosen Corp | 燃焼装置 |
| US6146007A (en) * | 1998-03-20 | 2000-11-14 | Cedarapids Inc. | Asphalt plant having centralized media burner and low fugitive emissions |
| FR2802119B1 (fr) * | 1999-12-08 | 2002-04-12 | Inst Francais Du Petrole | Dispositif de liaison entre un tube destine au chauffage et/ ou au refroidissement d'un reacteur sous pression et ledit reacteur |
| US6532905B2 (en) * | 2001-07-17 | 2003-03-18 | The Babcock & Wilcox Company | CFB with controllable in-bed heat exchanger |
| CN100401003C (zh) * | 2005-12-13 | 2008-07-09 | 江苏工业学院 | 紧凑式内循环流化床换热器 |
| EP2373577B1 (en) * | 2008-12-17 | 2014-09-10 | MEMC Electronic Materials, Inc. | Processes and systems for producing silicon tetrafluoride from fluorosilicates in a fluidized bed reactor |
| FI124762B (fi) | 2009-04-09 | 2015-01-15 | Foster Wheeler Energia Oy | Kiertoleijupetikattila |
| CN102966943B (zh) * | 2012-11-21 | 2015-05-20 | 华中科技大学 | 一种可变循环流化床化学链燃烧装置 |
| US20170356642A1 (en) * | 2016-06-13 | 2017-12-14 | The Babcock & Wilcox Company | Circulating fluidized bed boiler with bottom-supported in-bed heat exchanger |
| FR3065886B1 (fr) * | 2017-05-05 | 2021-12-31 | Ifp Energies Now | Nouveau dispositif de distribution de melange polyphasique dans une enceinte comportant un milieu fluidise |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4594967A (en) * | 1985-03-11 | 1986-06-17 | Foster Wheeler Energy Corporation | Circulating solids fluidized bed reactor and method of operating same |
| DK158531C (da) * | 1985-06-13 | 1990-10-29 | Aalborg Vaerft As | Fremgangsmaade til kontinuerlig drift af en cirkulerende fluidiseret bed-reaktor samt reaktor til anvendelse ved udoevelse af fremgangsmaaden |
| DK120288D0 (da) * | 1988-03-04 | 1988-03-04 | Aalborg Boilers | Fluidbed forbraendigsreaktor samt fremgangsmaade til drift af en fluidbed forbraendingsreaktor |
| FR2648550B1 (fr) * | 1989-06-16 | 1995-01-27 | Inst Francais Du Petrole | Procede et dispositif de regulation ou controle du niveau thermique d'un solide pulverulent comportant un echangeur de chaleur a compartiments en lit fluidise ou mobile |
| US5069170A (en) * | 1990-03-01 | 1991-12-03 | Foster Wheeler Energy Corporation | Fluidized bed combustion system and method having an integral recycle heat exchanger with inlet and outlet chambers |
| US5133943A (en) * | 1990-03-28 | 1992-07-28 | Foster Wheeler Energy Corporation | Fluidized bed combustion system and method having a multicompartment external recycle heat exchanger |
| 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 |
| US5269263A (en) * | 1992-09-11 | 1993-12-14 | Foster Wheeler Energy Corporation | Fluidized bed reactor system and method of operating same |
| US5341766A (en) * | 1992-11-10 | 1994-08-30 | A. Ahlstrom Corporation | Method and apparatus for operating a circulating fluidized bed system |
| US5332553A (en) * | 1993-04-05 | 1994-07-26 | A. Ahlstrom Corporation | Method for circulating solid material in a fluidized bed reactor |
-
1992
- 1992-04-27 FR FR929205165A patent/FR2690512B1/fr not_active Expired - Fee Related
-
1993
- 1993-04-23 FI FI931839A patent/FI931839A/fi unknown
- 1993-04-23 MX MX9302383A patent/MX9302383A/es unknown
- 1993-04-23 CN CN93104645A patent/CN1051369C/zh not_active Expired - Lifetime
- 1993-04-23 CZ CZ93722A patent/CZ285056B6/cs not_active IP Right Cessation
- 1993-04-26 CA CA002094860A patent/CA2094860A1/fr not_active Abandoned
- 1993-04-26 RU RU93004641A patent/RU2104442C1/ru active
- 1993-04-26 PL PL93298706A patent/PL171124B1/pl unknown
- 1993-04-26 JP JP5099547A patent/JPH0694201A/ja active Pending
- 1993-04-27 DE DE69304777T patent/DE69304777T2/de not_active Expired - Lifetime
- 1993-04-27 AT AT93401095T patent/ATE143118T1/de not_active IP Right Cessation
- 1993-04-27 DK DK93401095.0T patent/DK0568448T3/da active
- 1993-04-27 EP EP93401095A patent/EP0568448B1/fr not_active Expired - Lifetime
- 1993-04-27 ES ES93401095T patent/ES2092244T3/es not_active Expired - Lifetime
- 1993-04-27 RO RO93-00587A patent/RO111033B1/ro unknown
- 1993-04-27 ZA ZA932943A patent/ZA932943B/xx unknown
-
1994
- 1994-11-17 US US08/344,633 patent/US5508007A/en not_active Expired - Lifetime
-
1996
- 1996-12-06 GR GR960403328T patent/GR3021923T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN1079293A (zh) | 1993-12-08 |
| CN1051369C (zh) | 2000-04-12 |
| PL171124B1 (pl) | 1997-03-28 |
| ZA932943B (en) | 1993-11-01 |
| FR2690512A1 (fr) | 1993-10-29 |
| CZ72293A3 (en) | 1993-11-17 |
| MX9302383A (es) | 1993-10-01 |
| DK0568448T3 (da) | 1996-10-07 |
| GR3021923T3 (en) | 1997-03-31 |
| ES2092244T3 (es) | 1996-11-16 |
| US5508007A (en) | 1996-04-16 |
| FI931839A0 (fi) | 1993-04-23 |
| RU2104442C1 (ru) | 1998-02-10 |
| EP0568448A1 (fr) | 1993-11-03 |
| FR2690512B1 (fr) | 1994-09-09 |
| DE69304777T2 (de) | 1997-01-30 |
| PL298706A1 (en) | 1993-11-02 |
| ATE143118T1 (de) | 1996-10-15 |
| CZ285056B6 (cs) | 1999-05-12 |
| RO111033B1 (ro) | 1996-06-28 |
| DE69304777D1 (de) | 1996-10-24 |
| CA2094860A1 (fr) | 1993-10-28 |
| JPH0694201A (ja) | 1994-04-05 |
| FI931839A (fi) | 1993-10-28 |
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