EP0970336A1 - Installation combinee d'un four et d'un appareil de distillation d'air et procede de mise en oeuvre - Google Patents

Installation combinee d'un four et d'un appareil de distillation d'air et procede de mise en oeuvre

Info

Publication number
EP0970336A1
EP0970336A1 EP99900984A EP99900984A EP0970336A1 EP 0970336 A1 EP0970336 A1 EP 0970336A1 EP 99900984 A EP99900984 A EP 99900984A EP 99900984 A EP99900984 A EP 99900984A EP 0970336 A1 EP0970336 A1 EP 0970336A1
Authority
EP
European Patent Office
Prior art keywords
blower
air
supplied
column
turbine
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.)
Granted
Application number
EP99900984A
Other languages
German (de)
English (en)
Other versions
EP0970336B1 (fr
Inventor
Alain Guillard
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP0970336A1 publication Critical patent/EP0970336A1/fr
Application granted granted Critical
Publication of EP0970336B1 publication Critical patent/EP0970336B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
    • F25J3/04139—Combination of different types of drivers mechanically coupled to the same compressor, possibly split on multiple compressor casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04024—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of purified feed air, so-called boosted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
    • F25J3/04115—Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
    • F25J3/04133—Electrical motor as the prime mechanical driver
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04381—Details relating to the work expansion, e.g. process parameter etc. using work extraction by mechanical coupling of compression and expansion so-called companders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/0446—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the heat generated by mixing two different phases
    • F25J3/04466—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the heat generated by mixing two different phases for producing oxygen as a mixing column overhead gas by mixing gaseous air feed and liquid oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
    • F25J3/04551—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the metal production
    • F25J3/04557—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the metal production for pig iron or steel making, e.g. blast furnace, Corex
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04593—The air gas consuming unit is also fed by an air stream
    • F25J3/046—Completely integrated air feed compression, i.e. common MAC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04612—Heat exchange integration with process streams, e.g. from the air gas consuming unit
    • F25J3/04618—Heat exchange integration with process streams, e.g. from the air gas consuming unit for cooling an air stream fed to the air fractionation unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
    • F25J2200/06—Processes or apparatus using separation by rectification in a dual pressure main column system in a classical double column flow-sheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/50—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being oxygen
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/915—Combustion

Definitions

  • the present invention relates to combined installations of at least one furnace, typically a metal treatment furnace, supplied with compressed air by at least one blower, and at least one air distillation apparatus, also supplied at least with part by said blower, supplying oxygen to the oven and comprising at least one medium pressure column and one mixing column.
  • at least one furnace typically a metal treatment furnace
  • at least one air distillation apparatus also supplied at least with part by said blower, supplying oxygen to the oven and comprising at least one medium pressure column and one mixing column.
  • the object of the present invention is to provide a combined installation of the type mentioned above, allowing reduced operating costs and with greater flexibility in the choice of operating ranges.
  • the cryogenic booster / turbine assembly is coupled to an auxiliary assistance member.
  • the object of the present invention is also to propose a method for implementing a combined installation comprising at least one oven and an air distillation apparatus comprising at least one medium pressure column and one mixing column, and supplied with air.
  • a pressure Pi by at least one blower, in which a part of the air flow supplied by the blower is derived to supply the air distillation apparatus and where part of this derived air is overpressed to supply the mixing column by a booster coupled to at least one cryogenic turbine which expands a fluid in the installation and which serves in particular to keep the distillation apparatus cold, in which assistance energy is supplied to the booster / turbine assembly cryogenic to maintain in the mixing column a pressure P 2 higher by at least 0.3 x 10 5 Pa compared to the pressure Pi without having to take an import part for the turbine ante of the air flow supplying the medium pressure column. 2
  • assistance is provided by an electric motor coupled to the shaft of the booster / turbine assembly.
  • FIG. 1 is a schematic view of a combined installation according to the invention.
  • FIG. 1 there is shown schematically a metal processing furnace, in this case a blast furnace (FM), and an associated air distillation apparatus essentially comprising, in the example shown, an exchange line main LE, a double column with a medium pressure column MP and a low pressure column BP, and a mixing column CM.
  • FM blast furnace
  • the FM oven and the distillation apparatus are supplied with air by the same blower S delivering into a main compressed air line A supplying at least the FM oven with a large volume of air (typically greater than 100,000 Nm 3 / h) under a medium pressure Pi of less than 6 ⁇ 10 5 Pa, typically between 3 ⁇ 10 5 Pa and 5.5 ⁇ 10 5 Pa.
  • Line A can also supply, simultaneously or alternately, another treatment furnace for metal, for example an electric oven with the AOD process.
  • From the main line Apart from an air bypass circuit D supplying the distillation apparatus with cooled air then purified in a purification apparatus E, typically of the type by 3 adsorption. Downstream of this purification device E, the circuit D is divided into a first line J for supplying the double column and a second line L for supplying air to the mixing column CM.
  • part of the air flow in line J is diverted into the exchange line LE and blown in a cryogenic turbine T to be introduced into the low pressure column BP at the low pressure of this last.
  • the turbine T is coupled to a booster C disposed in the line L to boost the compressed air from the blower and send it to the mixing column CM at a pressure P 2 greater than the pressure Pi by at least 0 , 3 x 10 5 Pa and less than 1.5 x 10 5 Pa, typically between 0.4 x 10 5 Pa and 0.8 x 10 5 Pa.
  • the booster / turbine assembly CT is assisted by at least one EM motor coupled to the shaft line of the CT assembly.
  • the EM motor is of an electric or hydraulic type, as described in the above-mentioned documents.
  • the make-up energy is around 30 to 500 W, depending on the characteristics of the combined installation and being inversely correlated to the pressure delivered by the blower S.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Processing Of Solid Wastes (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Duct Arrangements (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Central Air Conditioning (AREA)

Abstract

L'installation combinée comprend au moins un four (FM) et un appareil de distillation d'air comprenant au moins une colonne moyenne pression (MP) et une colonne de mélange (CM) fournissant de l'oxygène (O) au four, le four et l'appareil de distillation étant alimentés par une même soufflante (S), la colonne de mélange (CM) recevant de l'air surpressé par un surpresseur (C) couplé à une turbine cryogénique (T) détendant un fluide de l'appareil de distillation, l'ensemble surpresseur/turbine (C-T) étant couplé à un organe d'assistance auxiliaire (EM).

Description

1 INSTALLATION COMBINEE D'UN FOUR ET D'UN APPAREIL DE
DISTILLATION D'AIR ET PROCEDE DE MISE EN OEUVRE
La présente invention concerne les installations combinées d'au moins un four, typiquement un four de traitement de métal, alimenté en air comprimé par au moins une soufflante, et d'au moins un appareil de distillation d'air, également alimenté au moins en partie par ladite soufflante, fournissant de l'oxygène au four et comportant au moins une colonne moyenne pression et une colonne de mélange.
Une installation de ce type est décrite dans le document US-A-5 244 489 (Grenier), auquel on pourra se référer pour plus de détails. Dans ce document le surpresseur de l'air fourni à la colonne de mélange est entraîné par une turbine de maintien en froid détendant la part du flux d'air adressé à la colonne moyenne pression, dans un agencement imposant, pour effectuer la surpression nécessaire, de turbiner une part importante de l'air d'alimentation de la colonne moyenne pression occasionnant des pertes de rendement d'extraction et d'énergie ainsi que des surdimensionnements des postes de réfrigération et d'épuration de l'air d'alimentation de l'appareil de distillation.
La présente invention a pour objet de proposer une installation combinée du type mentionné plus haut, permettant des coûts d'exploitation réduits et avec une plus grande flexibilité dans le choix des plages de fonctionnement. Pour ce faire, selon une caractéristique de l'invention, l'ensemble surpresseur/turbine cryogénique est couplé à un organe d'assistance auxiliaire.
La présente invention a également pour objet de proposer un procédé de mise en oeuvre d'une installation combinée comprenant au moins un four et un appareil de distillation d'air comportant au moins une colonne moyenne pression et une colonne de mélange, et alimentés en air sous une pression Pi par au moins une soufflante, dans lequel on dérive une partie du débit d'air fourni par la soufflante pour alimenter l'appareil de distillation d'air et où l'on surpresse une partie de cet air dérivé pour alimenter la colonne de mélange par un surpresseur couplé à au moins une turbine cryogénique détendant un fluide de l'installation et servant notamment au maintien en froid de l'appareil de distillation, dans lequel on apporte une énergie d'assistance à l'ensemble surpresseur/turbine cryogénique pour maintenir dans la colonne de mélange une pression P2 supérieure d'au moins 0,3 x 105 Pa par rapport à la pression Pi sans devoir prélever pour le turbinage une part importante du débit d'air alimentant la colonne moyenne pression. 2 Selon une caractéristique plus particulière de l'invention, l'assistance est apportée par un moteur électrique couplé à l'arbre de l'ensemble surpresseur/turbine. -
L'assistance d'ensembles compresseur/turbine est connue depuis longtemps, en particulier pour assister les turbo-compresseurs de moteurs à combustion interne (cf US-A-4 485 310, de Valroger ou plus récemment, US-A-5 560 208, Halimi et al., avec assistance électrique, ou US-A-4 622 817, Kobayashi, avec assistance hydraulique). L'état de la technique n'enseigne par contre rien pour des applications d'alimentation d'appareils de distillation selon la présente invention.
D'autres caractéristiques et avantages de la présente invention ressortiront de la description suivante d'un mode de réalisation, donnée à titre illustratif mais nullement limitatif, faite en relation avec le dessin annexé sur lequel : la figure 1 est une vue schématique d'une installation combinée selon l'invention.
Sur la figure 1 , on a représenté schématiquement un four de traitement de métal, en l'occurence un haut fourneau (FM), et un appareil de distillation d'air associé comprenant essentiellement, dans l'exemple représenté, une ligne d'échange principal LE, une double colonne avec une colonne moyenne pression MP et une colonne basse pression BP, et une colonne de mélange CM.
Du sommet de la colonne de mélange CM par une ligne O d'oxygène moyenne pureté qui, selon l'invention, après traversée de la ligne d'échange LE, débouche dans la ligne d'air comprimé principale en amont du four FM pour enrichir en oxygène l'air fourni à ce dernier. Classiquement, du sommet de la colonne basse pression BP part une ligne d'azote impur N,. En variante, dans l'exemple représenté, la colonne basse pression BP est surmontée d'un minaret M utilisant comme reflux de l'azote liquide en provenance de la colonne MP et produisant à son sommet de l'azote pur évacué par une ligne Np pour une utilisation sur le site ou dans le voisinage de ce dernier.
Le four FM et l'appareil de distillation sont alimentés en air par une même soufflante S débitant dans une ligne d'air comprimé principale A alimentant au moins le four FM avec un fort volume d'air (supérieur typiquement à 100 000 Nm3/h) sous une moyenne pression Pi inférieure à 6 x 105 Pa, typiquement entre 3 x 105 Pa et 5,5 x 105 Pa. La ligne A peut également alimenter, en simultané ou en alterné, un autre four de traitement de métal, par exemple un four électrique avec le procédé AOD. De la ligne principale A part un circuit de dérivation d'air D alimentant l'appareil de distillation en air refroidi puis épuré dans un appareil d'épuration E, typiquement du type par 3 adsorption. En aval de cet appareil d'épuration E, le circuit D se divise en une première ligne J d'alimentation de la double colonne et une deuxième ligne L d'alimentation en air de la colonne de mélange CM.
Selon un aspect de l'invention, une partie du flux d'air dans la ligne J est dérivée dans la ligne d'échange LE et turbinee dans une turbine cryogénique T pour être introduite dans la colonne basse pression BP à la basse pression de cette dernière. La turbine T est couplée à un surpresseur C disposé dans la ligne L pour surpresser l'air comprimé en provenance de la soufflante et l'adresser à la colonne de mélange CM à une pression P2 supérieure à la pression Pi d'au moins 0,3 x 105 Pa et inférieure à 1 ,5 x 105 Pa, typiquement comprise entre 0,4 x 105 Pa et 0,8 x 105 Pa. Selon un aspect de l'invention, l'ensemble surpresseur/turbine C-T est assisté par au moins un moteur EM couplé à la ligne d'arbre de l'ensemble C-T. Le moteur EM est d'un type électrique ou hydraulique, tels que décrits dans les documents susmentionnés. Dans la pratique, l'énergie d'appoint est de l'ordre de 30 à 500 W, selon les caractéristiques de l'installation combinée et étant inversement corrélée à la pression délivrée par la soufflante S.
Quoique la présente invention ait été décrite en relation avec un mode de réalisation particulier, elle ne s'en trouve pas limitée mais au contraire susceptible de modifications et de variantes qui apparaîtront à l'homme de l'art tout en demeurant dans le cadre des revendications ci-après.

Claims

4REVENDICATIONS
1. Installation combinée comprenant au moins un four (FM) alimenté en air comprimé par au moins une soufflante (S), et au moins un appareil de distillation d'air alimenté au moins en partie par ladite soufflante (S) et fournissant de l'oxygène (O) au four, l'appareil comprenant au moins une colonne moyenne pression (MP) recevant de l'air à la pression (P de la soufflante et au moins une turbine cryogénique (T) détendant une partie de cet air en provenance de la soufflante, et une colonne de mélange (CM) fournissant ledit oxygène et recevant de l'air en provenance de la soufflante surpressé par un surpresseur (C) couplé à la turbine, dans lequel l'ensemble surpresseur/turbine cryogénique (C-T) est couplé à un organe d'assistance auxiliaire (EM)
2. Installation selon la revendication 1 , caractérisée en ce que l'organe d'assistance comprend au moins un moteur électrique (EM).
3. Procédé de mise en oeuvre d'une installation combinée comprenant au moins un four (FM) alimenté en air comprimé par au moins une soufflante (S) fournissant de l'air à une première pression (Pi) et en oxygène par au moins un appareil de séparation de l'air, comprenant au moins une colonne moyenne pression (MP) et une colonne de mélange (CM), alimenté en air au moins en partie par la soufflante (S), dans lequel la colonne de mélange est alimentée en air provenant de la soufflante (S) et surpressé par un surpresseur (C) couplé à au moins une turbine cryogénique (T) détendant un fluide de l'installation, dans lequel on apporte à l'ensemble surpresseur/turbine une énergie d'assistance pour maintenir dans la colonne de mélange (CM) une surpression d'au moins 0,3 x 105 Pa par rapport à la pression (Pi) de sortie de la soufflante. 4. Procédé selon la revendication 1 , caractérisé en ce qu'on apporte à l'ensemble surpresseur/turbine (C-T) une énergie d'assistance pour maintenir dans la colonne de mélange une surpression comprise entre environ 0,
4 x 105 Pa et 0,8 x 105 Pa par rapport à la pression (Pi) de sortie de la soufflante.
5. Procédé selon la revendication 3 ou la revendication 4, caractérisé en ce que l'énergie d'assistance est une énergie électrique.
EP99900984A 1998-01-23 1999-01-22 Installation combinee d'un four et d'un appareil de distillation d'air et procede de mise en oeuvre Expired - Lifetime EP0970336B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9800723 1998-01-23
FR9800723A FR2774158B1 (fr) 1998-01-23 1998-01-23 Installation combinee d'un four et d'un appareil de distillation d'air et procede de mise en oeuvre
PCT/FR1999/000128 WO1999037963A1 (fr) 1998-01-23 1999-01-22 Installation combinee d'un four et d'un appareil de distillation d'air et procede de mise en oeuvre

Publications (2)

Publication Number Publication Date
EP0970336A1 true EP0970336A1 (fr) 2000-01-12
EP0970336B1 EP0970336B1 (fr) 2007-09-05

Family

ID=9522093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99900984A Expired - Lifetime EP0970336B1 (fr) 1998-01-23 1999-01-22 Installation combinee d'un four et d'un appareil de distillation d'air et procede de mise en oeuvre

Country Status (13)

Country Link
US (1) US6122932A (fr)
EP (1) EP0970336B1 (fr)
JP (1) JP2001516439A (fr)
KR (1) KR100567646B1 (fr)
CN (1) CN1255967A (fr)
AT (1) ATE372493T1 (fr)
AU (1) AU740591B2 (fr)
BR (1) BR9904783A (fr)
CA (1) CA2284167C (fr)
DE (1) DE69937022T2 (fr)
ES (1) ES2292231T3 (fr)
FR (1) FR2774158B1 (fr)
WO (1) WO1999037963A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2782154B1 (fr) * 1998-08-06 2000-09-08 Air Liquide Installation combinee d'un appareil de production de fluide de l'air et d'une unite dans laquelle se produit une reaction chimique et procede de mise en oeuvre
US6192707B1 (en) * 1999-11-12 2001-02-27 Praxair Technology, Inc. Cryogenic system for producing enriched air
US6282901B1 (en) 2000-07-19 2001-09-04 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Integrated air separation process
EP1197717A1 (fr) * 2000-10-12 2002-04-17 Linde Aktiengesellschaft Dispositif et procédé de séparation de l'air
FR2862004B3 (fr) * 2003-11-10 2005-12-23 Air Liquide Procede et installation d'enrichissement d'un flux gazeux en l'un de ses constituants
FR2862128B1 (fr) * 2003-11-10 2006-01-06 Air Liquide Procede et installation de fourniture d'oxygene a haute purete par distillation cryogenique d'air
FR2864214B1 (fr) * 2003-12-22 2017-04-21 Air Liquide Appareil de separation d'air, appareil integre de separation d'air et de production d'un metal et procede de demarrage d'un tel appareil de separation d'air
DE102006039616B3 (de) * 2006-08-24 2008-04-03 Eberhard Otten Verfahren und Vorrichtung zur Speicherung von Brenngas, insbesondere Erdgas

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504992B1 (fr) * 1981-04-30 1986-11-14 Valbrev Combinaison d'une turbo-machine de compression ou de detente et d'un moteur electrique
FR2677667A1 (fr) * 1991-06-12 1992-12-18 Grenier Maurice Procede d'alimentation d'un haut-fourneau en air enrichi en oxygene, et installation de reduction de minerai de fer correspondante.
GB9208647D0 (en) * 1992-04-22 1992-06-10 Boc Group Plc Air separation
US5582036A (en) * 1995-08-30 1996-12-10 Praxair Technology, Inc. Cryogenic air separation blast furnace system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9937963A1 *

Also Published As

Publication number Publication date
AU740591B2 (en) 2001-11-08
FR2774158B1 (fr) 2000-03-17
JP2001516439A (ja) 2001-09-25
DE69937022T2 (de) 2008-05-29
CN1255967A (zh) 2000-06-07
ES2292231T3 (es) 2008-03-01
DE69937022D1 (de) 2007-10-18
BR9904783A (pt) 2000-03-08
ATE372493T1 (de) 2007-09-15
AU2061899A (en) 1999-08-09
KR100567646B1 (ko) 2006-04-05
EP0970336B1 (fr) 2007-09-05
KR20000076374A (ko) 2000-12-26
CA2284167C (fr) 2008-04-15
US6122932A (en) 2000-09-26
FR2774158A1 (fr) 1999-07-30
WO1999037963A1 (fr) 1999-07-29
CA2284167A1 (fr) 1999-07-29

Similar Documents

Publication Publication Date Title
CA1100863A (fr) Traduction non-disponible
EP0653599B1 (fr) Installation combinée d'une unité de production de métal et d'une unité de séparation de gaz de l'air
JP2516851B2 (ja) 一貫式ガス化組合せサイクル電力発生方法
RU2387934C2 (ru) Способ разделения воздуха на составные части при помощи криогенной дистилляции
EP0717249B1 (fr) Séparation d'air
EP2122282A2 (fr) Procédé de séparation d'un mélange de monoxyde de carbone, de méthane, d'hydrogène et éventuellement d'azote par distillation cryogénique
EP2118601A2 (fr) Procede et appareil de production de gaz de l'air sous forme gazeuse et liquide a haute flexibilite par distillation cryogenique
FR2819584A1 (fr) Procede integre de separation d'air et de generation d'energie et installation pour la mise en oeuvre d'un tel procede
JP2002250586A (ja) 空気分離およびエネルギー発生のための統合された方法およびそのような方法を実施するためのプラント
US6085545A (en) Liquid natural gas system with an integrated engine, compressor and expander assembly
WO1999037963A1 (fr) Installation combinee d'un four et d'un appareil de distillation d'air et procede de mise en oeuvre
FR2711778A1 (fr) Procédé et installation de production d'oxygène et/ou d'azote sous pression.
EP0661505B1 (fr) Procédé et installation de liquéfaction d'un gaz
US6119482A (en) Combined plant of a furnace and an air distillation device, and implementation process
TW539840B (en) Process and apparatus for separating a gas mixture with emergency operation
US6089040A (en) Combined plant of a furnace and an air distillation device and implementation process
JPH0682157A (ja) 空気の分離
WO2011010049A2 (fr) Procédé et appareil de séparation d'air par distillation cryogénique
FR2686405A1 (fr) Procede et application de separation d'air, et application d'une telle installation.
FR2803221A1 (fr) Procede et installation de separation d'air
FR2864214A1 (fr) Appareil de separation d'air, appareil integre de separation d'air et de production d'un metal et procede de demarrage d'un tel appareil de separation d'air
CN108474616B (zh) 用于向空气分离设备提供辅助制冷的方法和***
EP1409937B1 (fr) Procede de production de vapeur d'eau et de distillation d'air
JPH08219636A (ja) 空気を分離する方法および装置
TW202210771A (zh) 用於低溫分離空氣的方法與設備

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: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 20000131

17Q First examination report despatched

Effective date: 20020214

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

Owner name: L'AIR LIQUIDE, S.A. A DIRECTOIRE ET CONSEIL DE SUR

APBX Invitation to file observations in appeal sent

Free format text: ORIGINAL CODE: EPIDOSNOBA2E

APBZ Receipt of observations in appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNOBA4E

APBT Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9E

APAA Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOS REFN

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

APAF Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNE

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

Owner name: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'E

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

Owner name: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'E

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 CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69937022

Country of ref document: DE

Date of ref document: 20071018

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

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

Effective date: 20071012

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

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070905

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070905

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2292231

Country of ref document: ES

Kind code of ref document: T3

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

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

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070905

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071206

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080206

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070905

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

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071205

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

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

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070905

26N No opposition filed

Effective date: 20080606

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

Ref country code: MC

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

Effective date: 20080131

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: LI

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

Effective date: 20080131

Ref country code: CH

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

Effective date: 20080131

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081029

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: 20080131

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

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070905

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

Ref country code: LU

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

Effective date: 20080122

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

Ref country code: IT

Payment date: 20120130

Year of fee payment: 14

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

Ref country code: DE

Payment date: 20130122

Year of fee payment: 15

Ref country code: ES

Payment date: 20130117

Year of fee payment: 15

Ref country code: GB

Payment date: 20130122

Year of fee payment: 15

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

Ref country code: BE

Payment date: 20130128

Year of fee payment: 15

BERE Be: lapsed

Owner name: L'AIR LIQUIDE, S.A. POUR L'ETUDE ET L'EXPLOITATIO

Effective date: 20140131

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69937022

Country of ref document: DE

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

Effective date: 20140122

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69937022

Country of ref document: DE

Effective date: 20140801

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: 20140801

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

Ref country code: GB

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

Effective date: 20140122

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: 20140131

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20150407

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

Ref country code: ES

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

Effective date: 20140123

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 NON-PAYMENT OF DUE FEES

Effective date: 20140122