EP0914584A1 - Verfahren und einrichtung zur herstellung eines luftgases mit variablen mengen - Google Patents

Verfahren und einrichtung zur herstellung eines luftgases mit variablen mengen

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Publication number
EP0914584A1
EP0914584A1 EP97935636A EP97935636A EP0914584A1 EP 0914584 A1 EP0914584 A1 EP 0914584A1 EP 97935636 A EP97935636 A EP 97935636A EP 97935636 A EP97935636 A EP 97935636A EP 0914584 A1 EP0914584 A1 EP 0914584A1
Authority
EP
European Patent Office
Prior art keywords
flow
liquid
gas
pressure
auxiliary
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
EP97935636A
Other languages
English (en)
French (fr)
Other versions
EP0914584B1 (de
Inventor
Bernard Darredeau
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
Family has litigation
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Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP0914584A1 publication Critical patent/EP0914584A1/de
Application granted granted Critical
Publication of EP0914584B1 publication Critical patent/EP0914584B1/de
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
    • 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
    • F25J3/04472—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 cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
    • F25J3/04496—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 cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist
    • F25J3/04503—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 cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems
    • F25J3/04509—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 cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems within the cold part of the air fractionation, i.e. exchanging "cold" within the fractionation and/or main heat exchange line
    • F25J3/04515—Simultaneously changing air feed and products output
    • 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
    • F25J3/04406—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 a dual pressure main column system
    • F25J3/04412—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 a dual pressure main column system in a classical double column flowsheet, 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
    • 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
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04812—Different modes, i.e. "runs" of operation
    • F25J3/04836—Variable air feed, i.e. "load" or product demand during specified periods, e.g. during periods with high respectively low power costs
    • 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/50—Processes or apparatus involving steps for increasing the pressure of gaseous 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
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/40—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval
    • F25J2240/46—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/42—Processes or apparatus involving steps for recycling of process streams the recycled stream being nitrogen
    • 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/62—Details of storing a fluid in a tank

Definitions

  • the present invention relates to a process for producing an air gas, in particular oxygen, with variable flow rate by air distillation, of the type described in the preamble of claim 1. •
  • the invention s 'applies in particular to the production of oxygen under pressure with variable flow.
  • the pressures in question here are absolute pressures, and the flow rates are molar flow rates.
  • EP-A-0 422 974 in the name of the Applicant describes a process of this type, called "rocking process", intended for the production of gaseous oxygen at variable flow rate.
  • the second fluid in question is air to be distilled, which is condensed at a variable rate.
  • the air which is condensed to vaporize the liquid oxygen is boosted by an additional booster, and, when the oxygen demand varies, it is necessary to vary significantly to both the boosted flow and the flow compressed by the main compressor.
  • the compressor, and possibly the booster are significantly oversized with respect to the nominal flow of oxygen to be produced.
  • they work for the majority of the time at flow rates greatly reduced compared to their capacities, and therefore with degraded performance.
  • the object of the invention is to allow the production of air gas with variable flow under particularly efficient and economical conditions. To this end, it relates to a process of the aforementioned type, characterized by the characterizing part of claim 1.
  • This process may include one or more of the features of claims 2 to 11.
  • the invention also relates to an installation intended for the implementation of such a process. This installation is described in claim 12.
  • This installation may include one or more of the features of claims 13 to 16.
  • FIG. 1 schematically represents an installation for producing oxygen under pressure with variable flow rate according to the invention
  • Figure 2 is a heat exchange diagram illustrating the vaporization of liquid oxygen under production pressure
  • Figures 3 and 4 schematically represent two variants of the installation.
  • the installation represented in FIG. 1 essentially comprises a main air compressor 1 with variable flow rate, for example of the centrifugal type with movable blades, an adsorption purification device 2, a heat exchange line 3, a turbine 4 for keeping cold, an air distillation apparatus 5 constituted by a double column itself comprising a medium pressure column 6 surmounted by a low pressure column 7 as well as a vaporizer -condenser 8, a liquid oxygen tank 10, a liquefied air tank 11, two pumps 12 and 13, an air booster 14 and an auxiliary capacity or "buffer" 15.
  • This installation is intended to produce a flow variable oxygen gas via a production line 16, under a pressure of about 15 bars.
  • a first flow is cooled in passages 19 of the exchange line 3; a part has left this exchange line after partial cooling, expanded to 1 bar in the turbine 4 and blown into the low pressure column 7 near its dew point via a line 20; the rest continues to cool down to the vicinity of its dew point at 6 bars, then is injected at the bottom of the medium pressure column 6 via a line 21.
  • a second flow is overpressed at 14 to a high condensation pressure defined below, then is cooled and liquefied in passages 22 of the exchange line, then stored in liquid form in the tank 11 after expansion to 6 bars in a valve expansion 23.
  • a constant flow of liquefied air is withdrawn from the bottom of this tank and is divided into a first constant flow under 6 bars sent to the medium pressure column via a line 24, and into a second constant relaxed flow towards 1 bar in an expansion valve 25 then injected into the low pressure column 7.
  • the vaporizer-condenser 8 vaporizes a constant flow of liquid oxygen in the bottom of the low pressure column 7 by condensing an approximately equal flow of nitrogen from the top of the medium pressure column 6.
  • "Rich liquid” air enriched in oxygen
  • "lean liquid” almost pure nitrogen
  • a constant flow of liquid oxygen corresponding to approximately 20% of the flow of incoming air, passes, via a line 28, into the tank 10.
  • An identical constant flow of liquid oxygen is withdrawn from the bottom of this tank and divided into two flows at constant rates:
  • a first majority flow representing for example 80% of the total flow, is compressed to 15 bars by the pump 12, pu s vaporized in passages 29 of the exchange line and supplied to the production line 16.
  • a second flow is compressed by the pump 13 to a much higher pressure, for example 30 bars, vaporized in passages 30 of the exchange line and supplied to the capacity 15.
  • the capacity 15 is connected to the production line 16 via a line 33 equipped with an expansion and flow control valve 34, and a constant flow equal to that of the aforementioned second flow is expanded in this valve 34 and sent from the capacity 15 to the pipe 16.
  • the installation comprises a single booster 14, so that the condensation of the boosted air is used, in the passages 22 of the exchange line, to vaporize both the oxygen under
  • the pressure of the supercharged air is chosen as being the pressure known as "concomitant" with the vaporization of oxygen at 15 bars.
  • This pressure is that for which the knee G of air liquefaction is close to the level P of vaporization of oxygen under 15 bars, as shown in FIG. 2, on which the quantities of heat exchanged Q are plotted on the ordinate and temperatures t on the abscissa.
  • the aforementioned knee G is at a temperature below the stage P 'of vaporization of oxygen under 30 bars, as also illustrated in the diagram in FIG. 2, but this is entirely possible provided that simultaneously evacuate a liquid product from the installation (oxygen or liquid nitrogen in this example), according to the teaching of FR-A- 2 674 011.
  • point A represents the inlet temperature of the turbine 4, and this inlet temperature is chosen so as to obtain a minimum temperature difference, of the order of a few degrees, at the hot end of the exchange line.
  • oxygen is produced at approximately 1 bar, and the demand for oxygen is always greater than a given minimum value
  • a constant flow of gaseous oxygen equal to this minimum value can then be withdrawn directly from the bottom of the low pressure column f via a pipe 35, as shown in phantom in Figure 1, then reheated in the exchange line.
  • This variant makes it possible to reduce the capacity of tanks 10 and 11.
  • constant productions of liquid oxygen and / or nitrogen gas and / or liquid nitrogen can be ensured simultaneously by the double column, via pipes 36 and / or 37 and / or 38, also as shown in phantom in Figure 1.
  • the pump 13 is deleted.
  • the auxiliary oxygen flow is withdrawn in gaseous form from the tank of the column 7, via a pipe 39, is heated at 30 under low pressure, then is compressed at high pressure by an auxiliary compressor 40 before being introduced in capacity 15.
  • the vaporizing fluid of at least one of the two oxygen flow rates is nitrogen.
  • the main flow is vaporized by means of the vaporizer 8 of the double column. This main flow is then withdrawn in gaseous form from the tank of the column 7, via a pipe 41, and reheated at 29. The outlet of the pump 12 is then connected to the tank of the column, which feeds the tank 10 by gravity .
  • the pipe 38 is connected to a nitrogen tank 42, and the bottom of this tank is connected to a pump 43 for returning a constant flow of liquid nitrogen at the top of column 6.
  • the scale is, in this variant, an oxygen / nitrogen scale, and the reservoir 11, at constant level, can be eliminated. If we combine the variants of Figures 3 and

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP97935636A 1996-07-25 1997-07-25 Verfahren und einrichtung zur herstellung eines luftgases mit variablen mengen Expired - Lifetime EP0914584B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9609376 1996-07-25
FR9609376A FR2751737B1 (fr) 1996-07-25 1996-07-25 Procede et installation de production d'un gaz de l'air a debit variable
PCT/FR1997/001401 WO1998004877A1 (fr) 1996-07-25 1997-07-25 Procede et installation de production d'un gaz de l'air a debit variable

Publications (2)

Publication Number Publication Date
EP0914584A1 true EP0914584A1 (de) 1999-05-12
EP0914584B1 EP0914584B1 (de) 2002-05-02

Family

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EP97935636A Expired - Lifetime EP0914584B1 (de) 1996-07-25 1997-07-25 Verfahren und einrichtung zur herstellung eines luftgases mit variablen mengen

Country Status (15)

Country Link
US (1) US6062044A (de)
EP (1) EP0914584B1 (de)
JP (1) JP2000515236A (de)
KR (1) KR100488029B1 (de)
CN (1) CN1145004C (de)
AR (1) AR013064A1 (de)
AT (1) ATE217071T1 (de)
BR (1) BR9710525A (de)
CA (1) CA2261097A1 (de)
DE (1) DE69712340T2 (de)
ES (1) ES2175446T3 (de)
FR (1) FR2751737B1 (de)
PL (1) PL331280A1 (de)
WO (1) WO1998004877A1 (de)
ZA (2) ZA976197B (de)

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US6182471B1 (en) * 1999-06-28 2001-02-06 Praxair Technology, Inc. Cryogenic rectification system for producing oxygen product at a non-constant rate
US6354105B1 (en) * 1999-12-03 2002-03-12 Ipsi L.L.C. Split feed compression process for high recovery of ethane and heavier components
EP1318368A1 (de) * 2001-12-10 2003-06-11 The Boc Group, Inc. Luftzerlegungsverfahren zur Produktion von gasförmigem Produkt mit variabeler Durchflussmenge
GB0219415D0 (en) * 2002-08-20 2002-09-25 Air Prod & Chem Process and apparatus for cryogenic separation process
US7228715B2 (en) * 2003-12-23 2007-06-12 L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Cryogenic air separation process and apparatus
US7272954B2 (en) * 2004-07-14 2007-09-25 L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Proceded Georges Claude Low temperature air separation process for producing pressurized gaseous product
US7553419B2 (en) * 2006-05-03 2009-06-30 Organix, Inc. Method of material processing to produce a fiber product
FR2949845B1 (fr) * 2009-09-09 2011-12-02 Air Liquide Procede d'operation d'au moins un appareil de separation d'air et d'une unite de combustion de combustibles carbones
US9400135B2 (en) * 2010-07-05 2016-07-26 L'Air Liquide Société Anonyme Pour L'Étude Et L'Exploitation Des Procedes Georges Claude Process and apparatus for the separation of air by cryogenic distillation
CN103282732B (zh) * 2010-07-05 2016-08-03 乔治洛德方法研究和开发液化空气有限公司 通过低温蒸馏分离空气的装置和方法
US10359231B2 (en) * 2017-04-12 2019-07-23 Praxair Technology, Inc. Method for controlling production of high pressure gaseous oxygen in an air separation unit

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FR2652887B1 (fr) * 1989-10-09 1993-12-24 Air Liquide Procede et installation de production d'oxygene gazeux a debit variable par distillation d'air.
FR2670278B1 (fr) * 1990-12-06 1993-01-22 Air Liquide Procede et installation de distillation d'air en regime variable de production d'oxygene gazeux.
FR2723184B1 (fr) * 1994-07-29 1996-09-06 Grenier Maurice Procede et installation de production d'oxygene gazeux sous pression a debit variable
FR2757282B1 (fr) * 1996-12-12 2006-06-23 Air Liquide Procede et installation de fourniture d'un debit variable d'un gaz de l'air

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See references of WO9804877A1 *

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Publication number Publication date
ZA976620B (en) 1999-01-25
FR2751737B1 (fr) 1998-09-11
ZA976197B (en) 1999-02-17
EP0914584B1 (de) 2002-05-02
CN1145004C (zh) 2004-04-07
DE69712340D1 (de) 2002-06-06
FR2751737A1 (fr) 1998-01-30
US6062044A (en) 2000-05-16
KR100488029B1 (ko) 2005-05-09
ES2175446T3 (es) 2002-11-16
ATE217071T1 (de) 2002-05-15
CN1226312A (zh) 1999-08-18
JP2000515236A (ja) 2000-11-14
DE69712340T2 (de) 2002-11-14
BR9710525A (pt) 1999-08-17
PL331280A1 (en) 1999-07-05
CA2261097A1 (fr) 1998-02-05
KR20000023846A (ko) 2000-04-25
AR013064A1 (es) 2000-12-13
WO1998004877A1 (fr) 1998-02-05

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