EP0605262A1 - Druckgassauerstoffherstellungsverfahren und Apparat - Google Patents

Druckgassauerstoffherstellungsverfahren und Apparat Download PDF

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Publication number
EP0605262A1
EP0605262A1 EP93402665A EP93402665A EP0605262A1 EP 0605262 A1 EP0605262 A1 EP 0605262A1 EP 93402665 A EP93402665 A EP 93402665A EP 93402665 A EP93402665 A EP 93402665A EP 0605262 A1 EP0605262 A1 EP 0605262A1
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EP
European Patent Office
Prior art keywords
column
low pressure
oxygen
pressure
pressure column
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
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EP93402665A
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English (en)
French (fr)
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EP0605262B1 (de
Inventor
Alain Guillard
Norbert Rieth
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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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Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP0605262A1 publication Critical patent/EP0605262A1/de
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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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04193—Division of the main heat exchange line in consecutive sections having different functions
    • F25J3/042—Division of the main heat exchange line in consecutive sections having different functions having an intermediate feed connection
    • 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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
    • F25J3/0426—The cryogenic component does not participate in the fractionation
    • 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
    • F25J3/04854—Safety aspects of operation
    • F25J3/0486—Safety aspects of operation of vaporisers for oxygen enriched liquids, e.g. purging of liquids
    • 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
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/0489—Modularity and arrangement of parts of the air fractionation unit, in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
    • 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
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04945—Details of internal structure; insulation and housing of the cold box
    • 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
    • F25J2200/20—Processes or apparatus using separation by rectification in an elevated pressure multiple column system wherein the lowest pressure column is at a pressure well above the minimum pressure needed to overcome pressure drop to reject the products to atmosphere
    • 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/50—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
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/42—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid 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
    • 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
    • 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
    • F25J2240/44—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 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
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    • 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
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • 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
    • 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
    • Y10S62/912—External refrigeration system
    • Y10S62/913—Liquified gas

Definitions

  • the present invention relates to a process for producing gaseous oxygen under pressure by means of a double distillation column.
  • gaseous oxygen under pressure is generally carried out either by compression of gaseous oxygen withdrawn from the low pressure column under a pressure close to atmospheric pressure, or by vaporization of liquid oxygen brought by pump to the production pressure.
  • the corresponding installations are complex, because they require special rotating machines such as an oxygen compressor or one or more expansion turbines.
  • the object of the invention is to provide a process which makes it possible to produce oxygen gas in a particularly economical manner under moderate pressure.
  • the invention also relates to an installation intended for the implementation of such a method.
  • This installation of the type comprising: an air compressor; a compressed air cleaning device; a double column for the distillation of purified air, itself comprising a medium pressure column and a low pressure column coupled by a vaporizer-condenser; a heat exchange line for cooling the purified air by indirect heat exchange with the products coming from the double column; and means for keeping the installation cold, is characterized in that the low pressure column operates under a pressure markedly higher than atmospheric pressure and slightly higher than the oxygen production pressure, this low pressure being in particular of l '' from 2 to 5 bars, in that an oxygen production pipe is directly connected to the tank of the low pressure column to extract gaseous oxygen therefrom, and in that the means for keeping cold include an expansion valve free of at least one gaseous product leaving the low pressure column.
  • the double column can in particular be isolated under vacuum, in particular by a vacuum envelope which contains only the double column and pipe sections, the rest of the cold parts of the installation, with the possible exception sources of liquid nitrogen and / or liquid oxygen and the pipes which leave therefrom, being insulated by a cold box at atmospheric pressure containing a solid insulator, in particular particulate.
  • the installation represented in FIG. 1 essentially comprises an air compressor 1, an apparatus 2 for purification by adsorption, a heat exchange line 3, a sub-cooler 4 and a double distillation column 5.
  • the latter is essentially consisting of a medium pressure column 6 surmounted by a low pressure column 7, and of a vaporizer-condenser 8 which brings the head vapor (practically pure nitrogen) of column 6 and the tank liquid (oxygen at the desired purity) from column 7.
  • the air to be distilled is compressed in 1 to a pressure, called medium pressure, of the order of 8 to 16 bars, purified in water and in carbon dioxide in 2, cooled near its dew point in 3 and introduced into the tank of column 6.
  • the "rich liquid” (oxygen-enriched air) collected in the tank of this column is sub-cooled in 4, expanded in an expansion valve 9 at a pressure, called low pressure, which is substantially the production pressure, of the order from 2 to 5 bars, and introduced at an intermediate level of column 7 via a pipe 10.
  • "Lean liquid” (practically pure nitrogen) collected at the top of column 6 is sub-cooled at 4, expanded in a valve trigger 11 at low pressure, and introduced at the head of column 7 via a pipe 12.
  • the production oxygen is withdrawn in the gaseous form from the tank of column 7, heated in the exchange line 3 and recovered directly in as a product via a production line 13.
  • the residual gas W (impure nitrogen), drawn off at the top of the column 7 via a pipe 14, is expanded in free expansion to a pressure slightly higher than atmospheric pressure in a valve. expansion 15, heated in the sub-cooler 4 then in the exchange line 3, and evacuated via a pipe 16. This gas can be used to regenerate the adsorbers of the device 2.
  • the installation shown is thermally insulated as follows.
  • the double column 5 is placed in a vacuum envelope 22, which ensures high performance insulation.
  • This envelope contains, in addition to the double column, only the sections of pipe which terminate there or leave it, these pipes passing through the envelope by means of appropriate fittings 23. In practice, it is advantageous to gather all the fittings 23 in one envelope region.
  • the vacuum envelope can have a diameter closely adapted to the outside diameter of the double column, which can be of constant diameter over its entire height, which makes it possible to produce an assembly double column 5-envelope 22 conveniently transportable.
  • this solution is also very advantageous, although it is much less expensive than vacuum insulation enclosing the entire installation.
  • 75 to 85% of the heat losses are borne by the double column and, in the heat exchange line, the losses are concentrated in the coldest part.
  • the insulation performance of the 22-24 assembly is of the order of 90% of that which would be obtained with vacuum insulation of the entire installation.
  • the double column may comprise a "minaret", that is to say an upper section of the low pressure column 7 making it possible to produce nitrogen gas at its top under low pressure.
  • this nitrogen gas can also be expanded in an expansion valve to the vicinity of atmospheric pressure to produce cold, before being heated in 4 and then in 3 and then being recovered as a second product of the installation.
  • the simplicity of the installation according to the invention makes it particularly advantageous for the production of moderate quantities, for example of the order of a few tens of tonnes per day, of gaseous oxygen under a pressure of a few bars.
  • the cold resistance of the installation is effected by free expansion of the waste gas W at 15, supplemented by a supply of liquid oxygen coming from a source 19 constituted as previously from a storage 19A at atmospheric pressure and a pump 19B.
  • the additional liquid oxygen pumped in 19B at a pressure somewhat higher than the low pressure, is injected, at an intermediate point 25 of the heat exchange line 3, in gaseous oxygen during heating.
  • a liquid oxygen purge pipe 26, fitted with a valve 27, leaves from the tank of the column 7 and opens into the storage 19A to supply it in part, the additional liquid oxygen being supplied by tankers 28.
  • the purge intended to evacuate the hydrocarbons from column 7, corresponds to approximately 0.2% of the flow of treated air and is preferably carried out batchwise, generally automatically; it is independent of the "bottle feeding" of the installation by liquid oxygen.
  • the injection point 25 is chosen so that the liquid oxygen vaporizes at a sufficiently high temperature so that the hydrocarbons no longer present a danger of explosion or flammability during the vaporization of the oxygen.
  • This temperature can thus be of the order of -100 ° C.

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  • 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)
EP93402665A 1992-12-30 1993-10-29 Druckgassauerstoffherstellungsverfahren und Apparat Revoked EP0605262B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9215925A FR2699992B1 (fr) 1992-12-30 1992-12-30 Procédé et installation de production d'oxygène gazeux sous pression.
FR9215925 1992-12-30

Publications (2)

Publication Number Publication Date
EP0605262A1 true EP0605262A1 (de) 1994-07-06
EP0605262B1 EP0605262B1 (de) 2000-06-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93402665A Revoked EP0605262B1 (de) 1992-12-30 1993-10-29 Druckgassauerstoffherstellungsverfahren und Apparat

Country Status (6)

Country Link
US (1) US5408831A (de)
EP (1) EP0605262B1 (de)
JP (1) JPH06229668A (de)
CA (1) CA2112499A1 (de)
DE (1) DE69328922T2 (de)
FR (1) FR2699992B1 (de)

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FR2793310A1 (fr) * 1999-05-06 2000-11-10 Air Liquide Procede et dispositif de separation d'air par voie cryogenique avec elimination des aerosols liquides et/ou solides
DE19919587B4 (de) * 1998-04-30 2007-08-16 L'Air Liquide, S.A. pour l'Etude et l'Exploitation des Procédés Georges Claude Luftdestillationsanlage und Kältebox
EP1903290A1 (de) * 2005-06-23 2008-03-26 Air Water Inc. Stickstofferzeugungsvorrichtung und einrichtung für deren verwendung
WO2012004241A2 (fr) 2010-07-05 2012-01-12 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Appareil et procede de separation d'air par distillation cryogenique
WO2013159868A3 (de) * 2012-04-27 2014-05-08 Linde Aktiengesellschaft Transportables paket mit einer coldbox,tieftemperatur-luftzerlegungsanlage und verfahren zum herstellen einer tieftemperatur-luftzerlegungsanlage
WO2018114052A2 (de) 2016-12-23 2018-06-28 Linde Aktiengesellschaft Verfahren zur tieftemperaturzerlegung von luft und luftzerlegungsanlage

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FR2706195B1 (fr) * 1993-06-07 1995-07-28 Air Liquide Procédé et unité de fourniture d'un gaz sous pression à une installation consommatrice d'un constituant de l'air.
FR2723184B1 (fr) * 1994-07-29 1996-09-06 Grenier Maurice Procede et installation de production d'oxygene gazeux sous pression a debit variable
GB9521996D0 (en) * 1995-10-27 1996-01-03 Boc Group Plc Air separation
US5682763A (en) * 1996-10-25 1997-11-04 Air Products And Chemicals, Inc. Ultra high purity oxygen distillation unit integrated with ultra high purity nitrogen purifier
DE19732887A1 (de) * 1997-07-30 1999-02-04 Linde Ag Verfahren zur Luftzerlegung
DE19737521A1 (de) * 1997-08-28 1999-03-04 Messer Griesheim Gmbh Anlage zur Tieftemperaturzerlegung von Luft
FR2774752B1 (fr) * 1998-02-06 2000-06-16 Air Liquide Installation de distillation d'air et boite froide correspondante
FR2774753B1 (fr) * 1998-02-06 2000-04-28 Air Liquide Installation de distillation d'air comprenant plusieurs unites de distillation cryogenique de meme nature
US6182471B1 (en) * 1999-06-28 2001-02-06 Praxair Technology, Inc. Cryogenic rectification system for producing oxygen product at a non-constant rate
EP1207362A1 (de) 2000-10-23 2002-05-22 Air Products And Chemicals, Inc. Verfahren und Vorrichtung zur Herstellung von gasförmigem Niederdrucksauerstoff
EP1582830A1 (de) * 2004-03-29 2005-10-05 Air Products And Chemicals, Inc. Verfahren und Apparatus zur Tieftemperaturluftzerlegung
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
FR2972794B1 (fr) 2011-03-18 2015-11-06 Air Liquide Appareil et procede de separation d'air par distillation cryogenique
CN103157342A (zh) * 2012-11-09 2013-06-19 中国科学院理化技术研究所 带强制换热结构的天然气/煤层气吸附净化方法及装置
JP6900241B2 (ja) * 2017-05-31 2021-07-07 レール・リキード−ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード ガス製造システム

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FR2578532A1 (fr) * 1985-03-11 1986-09-12 Air Liquide Procede et installation de production d'azote

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19919587B4 (de) * 1998-04-30 2007-08-16 L'Air Liquide, S.A. pour l'Etude et l'Exploitation des Procédés Georges Claude Luftdestillationsanlage und Kältebox
FR2793310A1 (fr) * 1999-05-06 2000-11-10 Air Liquide Procede et dispositif de separation d'air par voie cryogenique avec elimination des aerosols liquides et/ou solides
EP1903290A1 (de) * 2005-06-23 2008-03-26 Air Water Inc. Stickstofferzeugungsvorrichtung und einrichtung für deren verwendung
EP1903290A4 (de) * 2005-06-23 2011-02-16 Air Water Inc Stickstofferzeugungsvorrichtung und einrichtung für deren verwendung
US8549878B2 (en) 2005-06-23 2013-10-08 Air Water Inc. Method of generating nitrogen and apparatus for use in the same
WO2012004241A2 (fr) 2010-07-05 2012-01-12 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Appareil et procede de separation d'air par distillation cryogenique
WO2012004242A2 (fr) 2010-07-05 2012-01-12 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Appareil et procede de separation d'air par distillation cryogenique
WO2012004241A3 (fr) * 2010-07-05 2013-11-28 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Appareil et procede de separation d'air par distillation cryogenique
US9581386B2 (en) 2010-07-05 2017-02-28 L'Air Liquide Société Anonyme Pour L'Étude Et L'Exploitation Des Products Georges Claude Apparatus and process for separating air by cryogenic distillation
WO2013159868A3 (de) * 2012-04-27 2014-05-08 Linde Aktiengesellschaft Transportables paket mit einer coldbox,tieftemperatur-luftzerlegungsanlage und verfahren zum herstellen einer tieftemperatur-luftzerlegungsanlage
WO2018114052A2 (de) 2016-12-23 2018-06-28 Linde Aktiengesellschaft Verfahren zur tieftemperaturzerlegung von luft und luftzerlegungsanlage

Also Published As

Publication number Publication date
DE69328922D1 (de) 2000-08-03
EP0605262B1 (de) 2000-06-28
DE69328922T2 (de) 2000-11-16
US5408831A (en) 1995-04-25
FR2699992B1 (fr) 1995-02-10
CA2112499A1 (fr) 1994-07-01
FR2699992A1 (fr) 1994-07-01
JPH06229668A (ja) 1994-08-19

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