EP0531182B2 - Verfahren und Einrichtung zur Luftdestillation und die Verwendung bei der Zuführung von Gas in Stahlwerken - Google Patents

Verfahren und Einrichtung zur Luftdestillation und die Verwendung bei der Zuführung von Gas in Stahlwerken Download PDF

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Publication number
EP0531182B2
EP0531182B2 EP92402246A EP92402246A EP0531182B2 EP 0531182 B2 EP0531182 B2 EP 0531182B2 EP 92402246 A EP92402246 A EP 92402246A EP 92402246 A EP92402246 A EP 92402246A EP 0531182 B2 EP0531182 B2 EP 0531182B2
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Prior art keywords
column
oxygen
pressure
liquid
process according
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French (fr)
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EP0531182B1 (de
EP0531182A1 (de
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François Camberlein
Jean-Louis Girault
Philippe Mazieres
Jean-Pierre Tranier
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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    • 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
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of 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
    • F25J3/04248—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
    • F25J3/0446—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
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
    • 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
    • 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
    • F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
    • F25J2200/94—Details relating to the withdrawal point
    • 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
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
    • F25J2215/52—Oxygen production with multiple purity O2
    • 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
    • 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
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
    • F25J2250/40—One fluid being 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
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
    • F25J2250/50—One 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
    • 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
    • Y10S62/939—Partial feed stream expansion, air

Definitions

  • the present invention relates to a method of air distillation as defined in the preamble to the Claim 1.
  • a method is known for example from document FR-A-2 169 561
  • FR-A-2 169 561 describes a process for the distillation of air in which a mixing column is fed by a liquid oxygen flow rate, from a double column and by some of the air supply to the double column. This mixing column operates at a pressure substantially the same as that of the middle column double column pressure.
  • the invention aims to satisfy such needs economically, i.e. to allow, with a investment and relatively energy consumption low, the production of impure oxygen to purity and pressure chosen at will and, if necessary, production practically pure oxygen.
  • the invention relates to a method of air distillation by means of a double column of distillation coupled to a mixing column, such as defined in claim 1.
  • Said liquid may be the tank liquid of the low pressure column, especially oxygen practically without nitrogen, or be racked a few trays above from the low pressure column tank.
  • the invention also relates to the application of process defined above for supplying gas to a steelworks, said impure oxygen being produced under pressure from the blast furnace and being sent to the latter.
  • the air distillation installation shown in FIG. 1 is intended to produce impure oxygen, for example having a purity of 80 to 97% and preferably 85 to 95%, under a determined pressure P clearly different from 6 x 10 5 Pa abs., For example advantageously at a higher pressure of at least 2 x 10 5 Pa and possibly up to approximately 30 x 10 5 Pa, preferably between 8 x 10 5 Pa and 15 x 10 5 Pa.
  • the installation essentially comprises a heat exchange line 1, a double distillation column 2 itself comprising a medium pressure column 3, a low pressure column 4 and a main condenser-vaporizer 5, and a mixing column 6 Columns 3 and 4 typically operate at approximately 6 x 10 5 Pa and approximately 1 x 10 5 Pa, respectively.
  • a mixing column is a column which has the same structure as a distillation column but which is used for mixing close to reversibility a relatively volatile gas, introduced at its base, and a less volatile liquid, introduced at the top.
  • Such a mixture produces cooling energy and therefore reduces the energy consumption linked to the distillation.
  • this mixture is brought to profit, in addition, to produce oxygen directly impure under pressure P, as will be described below.
  • the air to be separated by distillation, compressed to 6 x 10 5 Pa and suitably purified, is conveyed to the base of the medium pressure column 3 by a pipe 7. Most of this air is cooled in the exchange line 1 and introduced at the base of the medium pressure column 3, and the rest, boosted at 8 then cooled, is expanded at low pressure in a turbine 9 coupled to the booster 8, then blown at an intermediate point of the low pressure column 4.
  • "Rich liquid” air enriched with oxygen
  • Liquid oxygen more or less pure depending on the setting of the double column 2, is withdrawn from the tank of column 4, carried by a pump 13 at a pressure P1, slightly higher than the pressure P above to take account of losses load (P1-P less than 1 x 10 5 Pa), and introduced at the top of column 6.
  • P1 is therefore advantageously between 8 x 10 5 Pa and 30 x 10 5 Pa, preferably between 8 x 10 5 Pa and 16 x 10 5 Pa.
  • auxiliary heat exchangers 19, 20, 21 ensuring the recovery of cold available in fluids on circulation in the installation.
  • the installation can simultaneously produce oxygen impure from column 6, oxygen to purity and different pressures, including almost pure oxygen, by drawing off at the bottom of column 4.
  • This oxygen can be supplied in gaseous form, via a conduit 22 passing through the exchange line 1, under the low pressure of column 4 or under pressure, in particular by pumping the liquid forward 23 its warming in the exchange line it can also be liquefied and sent to storage 24.
  • figure 3 differs from that of the Figure 2 by the fact that it also includes a column 25 for producing impure argon coupled, in a conventional manner, at the low pressure column 4.
  • impure oxygen is produced not not by the low pressure column 4 but by the mixture 6 produces impure oxygen containing very little argon, which leaves the possibility of producing in addition to argon, provided of course that oxygen liquid drawn off and pumped in year 13 has sufficient purity, in particular at least equal to 98%.
  • the auxiliary air at pressure P1 can be air suitably refined atmosphere, but also come from an additional process comprising an air compressor. he can for example air taken from the inlet of a gas and the pressure of which is possibly adjusted by means a pressure booster or an expansion turbine. More generally one can use to power the base of the mixing column 6, a mixture of less rich air gases we oxygenate only the liquid taken from the lower part of the pressure bases column, in particular of impure nitrogen possibly from the installation itself,
  • the invention makes it possible to simultaneously produce, under particularly economical conditions investment and energy consumption, oxygen pure or nearly pure, impure oxygen and argon.
  • the oxygen produced by column 4 is practically nitrogen-free and can therefore be used in the converters of a steelworks.
  • the installation, under the shape of Figure 2, thus allows to feed both these pure oxygen converters and the blast furnace the impure oxygen steelworks at the pressure of the blast furnace, in its form of FIG. 3, the installation can supply in addition the steelworks in Argon.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Claims (10)

  1. Verfahren zur Destillation von Luft mittels einer mit einer Mischkolonne (6) gekoppelten Doppeldestillationskolonne (2), bei dem die Mischkolonne sumpfseitig mit einem aus einem Luftgasgemisch bestehenden Hilfsgas und kopfseitig mit einer gegenüber dem Hilfsgas sauerstoffreicheren am unteren Teil der Niederdruck-Kolonne (4) entnommenen Flüssigkeit beschickt und am Kopf der Mischkolonne (6) ein Produktgas bildender Rohsauerstoff abgezogen wird, dadurch gekennzeichnet, daß das Hilfsgas und die Flüssigkeit, mit welchen die Mischkolonne (6) beschickt wird, im wesentlichen auf einen gleichen ersten Druck (P1), der größer ist als der der Mitteldruck-Kolonne (3), verdichtet sind.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Flüssigkeit die Sumpfflüssigkeit der Niederdruck-Kolonne (4) ist.
  3. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Flüssigkeit praktisch stickstofffreier Sauerstoff ist.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Flüssigkeit einige Böden oberhalb des Sumpfs der Niederdruck-Kolonne (4) ausgeleitet wird.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Sauerstoff aus dem Sumpf der Niederdruck-Kolonne (4) als ein zweites Produktgas abgezogen wird.
  6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß außerdem mittels einer zusätzlichen Destillationskolonne (25) zur Erzeugung von Rohargon, die mit der Niederdruck-Kolonne (4) gekoppelt ist, Argon erzeugt wird.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der erste Druck (P1) um mindestens 2 x 105 Pa größer ist als der Druck in der Mitteldruck-Kolonne.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß der erste Druck zwischen 8 x 105 Pa und 16 x 105 Pa liegt.
  9. Verwendung des Verfahrens nach einem der Ansprüche 1 bis 8 zur Versorgung eines einen Hochofen umfassenden Stahlwerks mit Gas, wobei der Rohsauerstoff mit einem dem Druck des Hochofens entsprechenden Druck erzeugt und diesem zugeführt wird.
  10. Verwendung nach Anspruch 9, dadurch gekennzeichnet, daß mit dem Verfahren nach Anspruch 3 der Sauerstoff den Konvertern des Stahlwerks praktisch stickstofffrei zugeführt wird.
EP92402246A 1991-08-07 1992-08-06 Verfahren und Einrichtung zur Luftdestillation und die Verwendung bei der Zuführung von Gas in Stahlwerken Expired - Lifetime EP0531182B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110035 1991-08-07
FR9110035A FR2680114B1 (fr) 1991-08-07 1991-08-07 Procede et installation de distillation d'air, et application a l'alimentation en gaz d'une acierie.

Publications (3)

Publication Number Publication Date
EP0531182A1 EP0531182A1 (de) 1993-03-10
EP0531182B1 EP0531182B1 (de) 1996-02-21
EP0531182B2 true EP0531182B2 (de) 2000-12-27

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EP92402246A Expired - Lifetime EP0531182B2 (de) 1991-08-07 1992-08-06 Verfahren und Einrichtung zur Luftdestillation und die Verwendung bei der Zuführung von Gas in Stahlwerken

Country Status (9)

Country Link
US (1) US5291737A (de)
EP (1) EP0531182B2 (de)
CN (1) CN1062656C (de)
AU (1) AU655485B2 (de)
BR (1) BR9203049A (de)
CA (1) CA2075420C (de)
DE (1) DE69208412T3 (de)
ES (1) ES2083709T5 (de)
FR (1) FR2680114B1 (de)

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DE69419675T2 (de) * 1993-04-30 2000-04-06 The Boc Group Plc Lufttrennung
US5440884A (en) * 1994-07-14 1995-08-15 Praxair Technology, Inc. Cryogenic air separation system with liquid air stripping
US5454227A (en) * 1994-08-17 1995-10-03 The Boc Group, Inc. Air separation method and apparatus
US5490391A (en) * 1994-08-25 1996-02-13 The Boc Group, Inc. Method and apparatus for producing oxygen
FR2731781B1 (fr) * 1995-03-15 1997-05-23 Air Liquide Procede et appareil de vaporisation d'un debit liquide
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FR2680114A1 (fr) 1993-02-12
CN1062656C (zh) 2001-02-28
ES2083709T3 (es) 1996-04-16
DE69208412T2 (de) 1996-07-04
AU655485B2 (en) 1994-12-22
ES2083709T5 (es) 2001-03-16
DE69208412T3 (de) 2001-08-23
EP0531182B1 (de) 1996-02-21
CA2075420C (fr) 2003-05-13
FR2680114B1 (fr) 1994-08-05
AU2079892A (en) 1993-02-11
EP0531182A1 (de) 1993-03-10
CN1071000A (zh) 1993-04-14
DE69208412D1 (de) 1996-03-28
US5291737A (en) 1994-03-08
CA2075420A1 (fr) 1993-02-08
BR9203049A (pt) 1993-05-04

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