DE4030750A1 - Combination triple duty compressor for prodn. of nitrogen@ and oxygen@ - has multiple shaft machine providing compression for feed air, first main stage, and coolant nitrogen streams - Google Patents

Combination triple duty compressor for prodn. of nitrogen@ and oxygen@ - has multiple shaft machine providing compression for feed air, first main stage, and coolant nitrogen streams

Info

Publication number
DE4030750A1
DE4030750A1 DE4030750A DE4030750A DE4030750A1 DE 4030750 A1 DE4030750 A1 DE 4030750A1 DE 4030750 A DE4030750 A DE 4030750A DE 4030750 A DE4030750 A DE 4030750A DE 4030750 A1 DE4030750 A1 DE 4030750A1
Authority
DE
Germany
Prior art keywords
compressor
nitrogen
air
circuit
oxygen
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.)
Withdrawn
Application number
DE4030750A
Other languages
German (de)
Inventor
Herbert Ing Grad Schoenecker
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.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to DE4030750A priority Critical patent/DE4030750A1/en
Publication of DE4030750A1 publication Critical patent/DE4030750A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/0403—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of 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
    • 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
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
    • F25J3/04139—Combination of different types of drivers mechanically coupled to the same compressor, possibly split on multiple compressor casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
    • F25J3/04145—Mechanically coupling of different compressors of the air fractionation process to the same driver(s)
    • 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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04163—Hot end purification of the feed air
    • F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
    • F25J3/04175—Hot end purification of the feed air by adsorption of the impurities at a pressure of substantially more than the highest 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
    • F25J3/04151—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
    • F25J3/04151—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
    • F25J3/04206—Division of the main heat exchange line in consecutive sections having different functions including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous product
    • F25J3/04212—Division of the main heat exchange line in consecutive sections having different functions including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous product and simultaneously condensing vapor from a column serving as reflux within the or another column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—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
    • F25J3/04296—Claude expansion, i.e. expanded into the main or 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
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04351—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen
    • F25J3/04357—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen and comprising a gas work expansion loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04381—Details relating to the work expansion, e.g. process parameter etc. using work extraction by mechanical coupling of compression and expansion so-called companders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work 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
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    • 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
    • F25J3/044—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 single pressure main column system only
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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
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    • 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
    • F25J3/04872—Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.
    • F25J3/04884—Arrangement of reboiler-condensers
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    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/40—Features relating to the provision of boil-up in the bottom of a column
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    • 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
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    • 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
    • F25J2250/42—One fluid being nitrogen
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
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Abstract

In the low temp. sepn. of air the feed air (1) is compressed (2), purified (3) and finally cooled (5, 42) before passing to a rectifying column (9) by which it is sepd. into O2 (10) and N2 (19). A recirculant N2 cooling system is maintained by a compressor (27) and a pressure let-down device (30), with a N2 fraction (19, 20, 22) discharging from the column (9) into the first stage compressor (23) which is upstream of the cooling circuit nitrogen recycle compressor (27). The novelty is the use of a single machine to fulfil the duties of the feed air compressor (2), cooling circuit N2 compressor (27) and the first stage compressor (23). USE/ADVANTAGE - Prodn. of O2 and N2 from air using a plant which is more compact and of approximately 50% the capital cost of previous similar plants by virtue of the combination triple duty compressor.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Tieftemperaturzerlegung von Luft, bei denen Luft in einem Luftverdichter komprimiert, in einer Reinigungsstufe vorgereinigt, anschließend abgekühlt, einer Rektifiziersäule zugeführt und dort in Sauerstoff und Stickstoff zerlegt wird, wobei in einem mit Stickstoff als Arbeitsmedium betriebenen Kältekreislauf, der einen Kreislaufverdichter und eine Entspannungseinrichtung aufweist, Kälte erzeugt wird und eine Stickstofffraktion aus der Rektifiziersäule herausgeleitet, in einem Vorverdichter komprimiert und dem Kältekreislauf vor dem Kreislaufverdichter zugeführt wird.The invention relates to a method and a device for cryogenic decomposition of air, where air is compressed in an air compressor, in a cleaning stage pre-cleaned, then cooled, fed to a rectification column and in there Oxygen and nitrogen is broken down, in one with nitrogen as the working medium operated refrigeration cycle, the one cycle compressor and one Has relaxation device, cold is generated and a nitrogen fraction the rectification column led out, compressed in a precompressor and the Refrigeration circuit is supplied before the circuit compressor.

Derartige Verfahren und Anlagen werden vor allem dann eingesetzt, wenn ein großer Anteil der Produkte flüssig gewonnen werden soll. Die für die Produktverflüssigung benötigte Kälte kann nicht zurückgewonnen werden. Es wird daher zusätzlich Kälte in einem Stickstoffkreislauf durch Verdichten und Entspannen von Stickstoff erzeugt. Das niedrigste Niveau des Kältekreislaufs (Ansaugdruck des Kreislaufverdichters) liegt dabei in der Regel über dem Druckniveau der Rektifiziersäule (im Falle einer Doppelsäule über dem Druck der Niederdrucksäule). Stickstoff, der aus der Niederdrucksäule bzw. aus der Einfachsäule in den Kältekreislauf eingeführt werden soll, muß daher zunächst in einem Vorverdichter komprimiert werden. Ein solches Verfahren ist beispielsweise aus dem Konferenzbericht "Luftzerlegungsanlagen" über die 5. Arbeitstagung der Linde AG vom 25. bis 27. Juni 1986 (Seite 17) bekannt. Such processes and systems are used primarily when a large Proportion of products to be obtained in liquid form. The one for product liquefaction Required cold cannot be recovered. It is therefore additionally cold in a nitrogen cycle by compressing and releasing nitrogen. The lowest level of the refrigeration circuit (intake pressure of the circuit compressor) usually above the pressure level of the rectification column (in the case of a Double column above the pressure of the low pressure column). Nitrogen coming from the Low pressure column or from the single column are introduced into the refrigeration cycle should therefore first be compressed in a pre-compressor. Such one The procedure is, for example, from the conference report "Air separation plants" the 5th working conference of Linde AG from June 25 to 27, 1986 (page 17).  

In der Regel handelt es sich um einen teilweise geschlossenen Kreislauf, d. h. entspannter Kreislaufstickstoff wird zu einem Teil zum Kreislaufverdichter zurückgeführt, nachdem er anderen Prozeßströmen Wärme durch indirekten Wärmeaustausch entzogen hat, und zu einem anderen Teil in die Rektifiziersäule geführt, um dort beispielsweise als flüssiger Rücklauf zu dienen. Ein weiterer Anteil wird in der Regel als Flüssigprodukt gewonnen. Die im Kreislauf geführte Menge richtet sich nach dem Kältebedarf der Anlage, d. h. in erster Linie nach dem Anteil der Flüssigprodukte.As a rule, it is a partially closed cycle, i.e. H. relaxed cycle nitrogen becomes part of the cycle compressor returned after passing heat through indirect process flows Has deprived heat exchange, and to another part in the rectification column performed, for example, to serve as a liquid return. Another share is usually obtained as a liquid product. The amount circulated depends on according to the cooling requirements of the system, d. H. primarily according to the percentage of Liquid products.

In speziellen Fällen kann der Kreislauf vollständig offen betrieben werden, indem sämtliches Arbeitsmedium nach dem Entspannen dem Kältekreislauf entzogen wird. Die Entspannung des Kreislaufgases wird vorzugsweise zum größten Teil arbeitsleistend durchgeführt.In special cases, the circuit can be operated completely open by all working medium is removed from the refrigeration cycle after relaxing. The relaxation of the cycle gas is preferably for the most part carried out work.

Das gattungsgemäße Verfahren arbeitet auch bei hohem Anteil an flüssig gewonnenen Produkten, d. h. bei äußerst hohem Kältebedarf, energetisch relativ günstig. Die hohe Anzahl an mit von außen eingebrachter Energie angetriebener Verdichter (Luftverdichter, Kreislaufverdichter und Vorverdichter) zieht jedoch hohe Kapitalkosten und einen großen Raumbedarf nach sich.The generic method works even with a high proportion of liquid obtained Products, d. H. with extremely high cooling requirements, energetically relatively cheap. The height Number of compressors driven by external energy (Air compressors, circulation compressors and pre-compressors), however, draws high capital costs and a large space requirement.

Die Erfindung hat zur Aufgabe, das gattungsgemäße Verfahren wirtschaftlicher zu gestalten, insbesondere durch Verringerung der Kapitalkosten.The object of the invention is to make the generic method more economical shape, especially by reducing the cost of capital.

Diese Aufgabe wird dadurch gelöst, daß Luftverdichter, Kreislaufverdichter und Vorverdichter durch eine einzige Maschine realisiert sind.This object is achieved in that air compressors, circuit compressors and Pre-compressors are realized by a single machine.

Die Zusammenfassung der drei Verdichter in eine einzige Maschine vermindert den Kostenaufwand gegenüber dem Einsatz dreier Einzelverdichter um etwa 50%. Neben den Maschinenkosten verringert sich der Platzbedarf im Maschinenraum durch die erfindungsgemäße Verfahrensweise erheblich. Da die Verdichter-Maschinen und ihre Antriebsaggregate einen hohen Anteil an der für eine Luftzerlegungsanlage benötigten Stellfläche einnehmen, stellt dies vor allem bei beengten Verhältnissen, wie sie in Industrieanlagen häufig vorkommen, einen nicht unerheblichen Vorteil dar. The combination of the three compressors in a single machine reduces the Costs compared to the use of three individual compressors by about 50%. Next The machine costs reduce the space required in the machine room through the Procedure according to the invention considerably. Because the compressor machines and their Drive units a high proportion of that required for an air separation plant Take up floor space, especially in tight spaces like the one in Industrial plants occur frequently, a not inconsiderable advantage.  

Die Vorteile des erfindungsgemäßen Verfahrens kommen besonders zur Geltung, wenn eine Mehr-Wellen-Maschine mit acht bis zehn Laufrädern als Luftverdichter, Kreislaufverdichter und Vorverdichter eingesetzt wird. Dadurch können die Leistungen der drei Verdichter so gewählt werden, daß keine nennenswerten energetischen Nachteile gegenüber der Verwendung von Einzelmaschinen zu verzeichnen sind. Derartige Verdichter sind beispielsweise bei der Firma Babcock-Borsig erhältlich (z. B. Getriebe-Turboverdichter Typ GK 500-2000).The advantages of the method according to the invention are particularly evident when a multi-shaft machine with eight to ten impellers as an air compressor, Circulation compressor and pre-compressor is used. This allows the benefits of the three compressors are chosen so that no significant energetic Disadvantages compared to the use of individual machines are noted. Such compressors are available, for example, from Babcock-Borsig (e.g. Geared turbo compressor type GK 500-2000).

Es hat sich als günstig erwiesen, gemäß einem weiteren Aspekt der Erfindung Luftverdichter und Vorverdichter durch jeweils zwei bis drei Laufräder und den Kreislaufverdichter durch drei bis vier Laufräder zu realisieren. Diese Konfigurationen wurden durch umfangreiche Berechnungen entwickelt und in einer Versuchsanlage erfolgreich verwirklicht.It has proven to be advantageous according to a further aspect of the invention Air compressor and pre-compressor by two to three impellers and the Circuit compressors to be implemented with three to four impellers. These configurations were developed through extensive calculations and in a test facility successfully realized.

Eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahren weist einen Luftverdichter, eine Reinigungseinrichtung, einen Wärmetauscher, eine Rektifiziersäule, daran angeschlossene Produktleitungen für Sauerstoff und Stickstoff, sowie einen mit Stickstoff als Arbeitsmedium betriebenen Kältekreislauf, der einen Kreislaufverdichter und eine Entspannungseinrichtung aufweist, und mit einer Stickstoffleitung auf, die von der Rektifiziersäule zu einem Vorverdichter und von diesem weiter zu dem Kreislaufverdichter führt, und ist gekennzeichnet durch eine Mehr-Wellen-Maschine mit acht bis zehn Laufrädern, die als Luftverdichter, Kreislaufverdichter und Vorverdichter dient.A device for carrying out the method according to the invention has a Air compressor, a cleaning device, a heat exchanger, a rectification column, connected product lines for oxygen and nitrogen, as well as one with Nitrogen as the working medium operated refrigeration cycle, which is a cycle compressor and having an expansion device, and with a nitrogen line which from the rectification column to a precompressor and from there to the Cycle compressor leads, and is characterized by a multi-shaft machine eight to ten impellers used as air compressors, circulation compressors and pre-compressors serves.

Die Erfindung sowie nähere Einzelheiten der Erfindung werden im folgenden anhand eines in der Zeichnung skizziert dargestellten Ausführungsbeispiels näher erläutert. The invention and further details of the invention are described below an embodiment shown in the drawing outlined.  

Luft wird über Leitung 1 von einem Verdichter 2 angesaugt und anschließend in einer Molsiebanlage 3 von Wasser und Kohlendioxid befreit. Die verdichtete und vorgereinigte Luft wird über Leitung 4 durch einen Hauptwärmetauscher 5 geführt und dort in indirektem Wärmeaustausch mit Produktströmen abgekühlt. Die auf eine Temperatur von 238 bis 246 K, vorzugsweise 240 bis 244 K abgekühlte und unter einem Druck von 4,2 bis 5,0, vorzugsweise 4,4 bis 4,7 bar stehende Luft (Leitung 6) wird in einer Entspannungsturbine 7 auf einen Druck von 1,3 bis 1,6, vorzugsweise 1,4 bis 1,5 bar entspannt und kühlt sich dabei weiter auf 176 bis 184, vorzugsweise 178 bis 182 K ab. Anschließend wird sie über Leitung 8 erneut in den Hauptwärmetauscher 5 eingeführt und schließlich mit einer Temperatur von 94 bis 100 K, vorzugsweise 96 bis 98 K in die Rektifiziersäule 9 eingeführt. Die bei der Entspannung 7 der Luft gewonnene Arbeit wird vorzugsweise in einem Zusatzverdichter 40 zur Verdichtung von Einsatzluft verwendet.Air is drawn in via line 1 from a compressor 2 and then freed of water and carbon dioxide in a molecular sieve system 3 . The compressed and pre-cleaned air is passed through line 4 through a main heat exchanger 5 and cooled there in indirect heat exchange with product streams. The air (line 6 ), which has been cooled to a temperature of 238 to 246 K, preferably 240 to 244 K and is under a pressure of 4.2 to 5.0, preferably 4.4 to 4.7 bar, is brought up in an expansion turbine 7 a pressure of 1.3 to 1.6, preferably 1.4 to 1.5 bar relaxed and cools further to 176 to 184, preferably 178 to 182 K. Then it is introduced again via line 8 into the main heat exchanger 5 and finally introduced into the rectification column 9 at a temperature of 94 to 100 K, preferably 96 to 98 K. The work obtained in the expansion 7 of the air is preferably used in an additional compressor 40 for compressing feed air.

Der Rektifiziersäule 9 werden flüssiger Sauerstoff 10, gasförmiger Stickstoff 19 sowie etwas unterhalb des Kopfes außerdem unreiner Stickstoff 24 entnommen.Liquid rectifier 10 , gaseous nitrogen 19 as well as impure nitrogen 24 are removed from the rectification column 9 and somewhat below the head.

Ein Teil des Sauerstoffs 10 wird als Flüssigprodukt 11 abgeführt. Der Rest (Leitung 12) wird in einem Kondensator 18 verdampft und teilweise über Leitung 14 in die Rektifiziersäule 9 zurückgeführt, teilweise über Leitung 15 in den Hauptwärmetauscher 5 eingeleitet. Der auf nahezu Umgebungstemperatur angewärmte gasförmige Sauerstoff 16 kann als Produkt abgezogen (Leitung 17) oder als Regeneriergas für die Molsiebanlage 3 verwendet werden (Leitung 18).Part of the oxygen 10 is removed as a liquid product 11 . The rest (line 12 ) is evaporated in a condenser 18 and partly returned to the rectification column 9 via line 14 , and partly introduced into the main heat exchanger 5 via line 15 . The gaseous oxygen 16 warmed to almost ambient temperature can be drawn off as a product (line 17 ) or as a regeneration gas for the molecular sieve system 3 (line 18 ).

Der gasförmige Stickstoff (Leitung 19) wird im Unterkühler 26 und im Hauptwärmetauscher 5 angewärmt und mindestens zum Teil als Produkt abgezogen (Leitung 21). Der über Leitung 24 herausgeführte unreine Stickstoff dient ebenfalls zur Abkühlung anderer Prozeßströme in Unterkühler 26 und Hauptwärmetauscher 5 und wird über Leitung 25 unter Umgebungstemperatur abgezogen. The gaseous nitrogen (line 19 ) is heated in the subcooler 26 and in the main heat exchanger 5 and at least partially removed as a product (line 21 ). The impure nitrogen led out via line 24 also serves to cool other process streams in subcooler 26 and main heat exchanger 5 and is drawn off via line 25 at ambient temperature.

Zur Erzeugung der für die Flüssigproduktion benötigten Kälte weist das Verfahren einen Kältekreislauf auf, in dem gasförmiger Mitteldruckstickstoff (5,0 bis 5,6, vorzugsweise 5,3 bis 5,4 bar) in einem Kreislaufverdichter 27 und einem nachgeschalteten Nachverdichter 28 auf einen Druck von 88 bis 42, vorzugsweise 40 bis 41 bar gebracht und im Hauptwärmetauscher 5 abgekühlt wird. Der Kreislaufstickstoff wird mindestens zum Teil über Leitung 29 unter einer Temperatur von 158 bis 166, vorzugsweise 160 bis 164 K einer Entspannungsturbine 30 zugeführt und dort arbeitsleistend entspannt. Die dabei gewonnene Arbeit wird vorzugsweise zur Nachverdichtung 28 eingesetzt. Das entspannte Gas in Leitung 32 weist einen Druck von 5,4 bis 6,0, vorzugsweise 5,8 bis 6,0 bar und eine Temperatur von 95 bis 99, vorzugsweise 96 bis 98 K auf. Ein Teil des Kreislaufstickstoffs kann auch über Leitung 31 an der Entspannungturbine 30 vorbeigeleitet werden.To generate the refrigeration required for liquid production, the method has a refrigeration cycle in which gaseous medium-pressure nitrogen (5.0 to 5.6, preferably 5.3 to 5.4 bar) in a circuit compressor 27 and a downstream secondary compressor 28 to a pressure brought from 88 to 42, preferably 40 to 41 bar and cooled in the main heat exchanger 5 . The circulating nitrogen is fed at least in part via line 29 at a temperature of 158 to 166, preferably 160 to 164 K, to an expansion turbine 30 and is expanded there while performing work. The work obtained is preferably used for post-compaction 28 . The expanded gas in line 32 has a pressure of 5.4 to 6.0, preferably 5.8 to 6.0 bar and a temperature of 95 to 99, preferably 96 to 98 K. Part of the circulating nitrogen can also be directed past the expansion turbine 30 via line 31 .

Über Leitung 33 schließt sich der Kältekreislauf. Das durch Leitung 33 zur Saugseite des Kreislaufverdichters 27 zurückgeführte Stickstoffgas wird durch den Hauptwärmetauscher 5 geleitet und nimmt dabei Wärme aus anderen Prozeßströmen auf.The cooling circuit closes via line 33 . The nitrogen gas which is returned through line 33 to the suction side of the circulation compressor 27 is passed through the main heat exchanger 5 and thereby absorbs heat from other process streams.

Ein Teil des entspannten Kreislaufgases wird über Leitung 84 zum Kondensator 18 geführt, kondensiert, im Unterkühler 26 weiter abgekühlt und zum einen Teil als Rücklauf in die Rektifiziersäule 9 (Leitung 35), zum anderen Teil in einen Abscheider 37 eingedrosselt. Flüssiger Stickstoff 88 kann dem Abscheider als Produkt entnommen werden, restliches Stickstoffgas wird über Leitung 39 wieder in die Gasleitung 19 zurückgeführt.A part of the expanded recycle gas is led via line 84 to the condenser 18 , condensed, further cooled in the subcooler 26 and partly throttled as a return into the rectification column 9 (line 35 ) and partly throttled into a separator 37 . Liquid nitrogen 88 can be removed from the separator as a product; residual nitrogen gas is returned to gas line 19 via line 39 .

Der Kältekreislauf wird mit Arbeitsmedium gespeist, indem ein Teil des gasförmigen Stickstoffs in Leitung 20 abgezweigt und zum Kreislaufverdichter 27 geführt wird (Leitung 22). Das Gas muß dabei in einem Vorverdichter 23 auf den Saugdruck des Kreislaufverdichters gebracht werden.The cooling circuit is fed with working medium by branching off part of the gaseous nitrogen in line 20 and leading it to the circuit compressor 27 (line 22 ). The gas must be brought to the suction pressure of the circulation compressor in a pre-compressor 23 .

Erfindungsgemäß bilden Luftverdichter 2, Kreislaufverdichter 27 und Vorverdichter 23 eine Einheit. Es kommt eine Mehr-Wellen-Maschine mit acht bis zehn Laufrädern zum Einsatz, von denen jeweils zwei bis drei den Luftverdichter 2 bzw. den Vorverdichter 23 und drei bis vier den Kreislaufverdichter 27 realisieren. According to the invention, air compressor 2 , circuit compressor 27 and pre-compressor 23 form a unit. A multi-shaft machine with eight to ten impellers is used, two to three of which implement the air compressor 2 or the pre-compressor 23 and three to four the circuit compressor 27 .

Es kann bei dem Verfahren günstig sein, an einigen Stellen zusätzlich Fremdkälte zuzuführen, beispielsweise der verdichteten Luft vor der Molsiebanlage 8 (Wärmetauscher 41) und/oder vor der arbeitsleistenden Entspannung 7 (Wärmetauscher 42) und/oder auch dem Kreislaufstickstoff zwischen Verdichten 27, 28 und Entspannen 30 (Wärmetauscher 43).In the method, it may be favorable to additionally supply external cooling at some points, for example the compressed air upstream of the molecular sieve system 8 (heat exchanger 41 ) and / or before the expansion of work 7 (heat exchanger 42 ) and / or the nitrogen in the circuit between compressors 27 , 28 and relaxing 30 (heat exchanger 43 ).

Claims (4)

1. Verfahren zur Tieftemperaturzerlegung von Luft, bei dem Luft (1) in einem Luftverdichter (2) komprimiert, in einer Reinigungsstufe (3) vorgereinigt, anschließend abgekühlt (5, 42), einer Rektifiziersäule (9) zugeführt (8) und dort in Sauerstoff (10) und Stickstoff (19) zerlegt wird, wobei in einem mit Stickstoff als Arbeitsmedium betriebenen Kältekreislauf, der einen Kreislaufverdichter (27) und eine Entspannungseinrichtung (30) aufweist, Kälte erzeugt wird und eine Stickstofffraktion aus der Rektifiziersäule (9) herausgeleitet (19, 20, 22), in einem Vorverdichter (23) komprimiert und dem Kältekreislauf vor dem Kreislaufverdichter (27) zugeführt wird, dadurch gekennzeichnet, daß Luftverdichter (2), Kreislaufverdichter (27) und Vorverdichter (28) durch eine einzige Maschine realisiert sind.1. A method for the low-temperature separation of air, in which air ( 1 ) is compressed in an air compressor ( 2 ), pre-cleaned in a cleaning stage ( 3 ), then cooled ( 5 , 42 ), fed to a rectification column ( 9 ) ( 8 ) and there in Oxygen ( 10 ) and nitrogen ( 19 ) is broken down, cooling being generated in a cooling circuit operated with nitrogen as the working medium, which has a circuit compressor ( 27 ) and a relaxation device ( 30 ), and a nitrogen fraction is led out of the rectification column ( 9 ) ( 19, 20, 22), compressed in a supercharger (23) and the refrigeration cycle is supplied before the cycle compressor (27), characterized in that the air compressor (2), the cycle compressor (27) and pre-compressor (28) are realized by a single machine . 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß eine Mehr-Wellen-Maschine mit acht bis zehn Laufrädem als Luftverdichter (2), Kreislaufverdichter (27) und Vorverdichter (28) eingesetzt wird.2. The method according to claim 1, characterized in that a multi-shaft machine with eight to ten wheels as an air compressor ( 2 ), circuit compressor ( 27 ) and pre-compressor ( 28 ) is used. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß Luftverdichter (2) und Vorverdichter (23) durch jeweils zwei bis drei Laufräder und der Kreislaufverdichter (27) durch drei bis vier Laufräder realisiert sind. 3. The method according to claim 2, characterized in that the air compressor ( 2 ) and pre-compressor ( 23 ) are realized by two to three impellers and the circuit compressor ( 27 ) by three to four impellers. 4. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 3 mit einem Luftverdichter (2), einer Reinigungseinrichtung (3), einem Hauptwärmetauscher (5), einer Rektifiziersäule (9), daran angeschlossenen Produktleitungen für Sauerstoff (10) und Stickstoff (19), mit einem mit Stickstoff als Arbeitsmedium betriebenen Kältekreislauf, der einen Kreislaufverdichter (27) und eine Entspannungseinrichtung (6) aufweist, und mit einer Stickstoffleitung (19, 20, 22), die von der Rektifiziersäule (9) zu einem Vorverdichter (23) und von diesem weiter zu dem Kreislaufverdichter (27) führt, gekennzeichnet durch eine Mehr-Wellen-Maschine mit acht bis zehn Laufrädern, die als Luftverdichter (2), Kreislaufverdichter (27) und Vorverdichter (23) dient.4. Device for performing the method according to one of claims 1 to 3 with an air compressor ( 2 ), a cleaning device ( 3 ), a main heat exchanger ( 5 ), a rectification column ( 9 ), product lines for oxygen ( 10 ) and nitrogen ( 19 ), with a refrigeration circuit operated with nitrogen as the working medium, which has a circuit compressor ( 27 ) and an expansion device ( 6 ), and with a nitrogen line ( 19 , 20 , 22 ) which runs from the rectification column ( 9 ) to a precompressor ( 23 ) and leads from there to the circuit compressor ( 27 ), characterized by a multi-shaft machine with eight to ten impellers, which serves as an air compressor ( 2 ), circuit compressor ( 27 ) and pre-compressor ( 23 ).
DE4030750A 1990-09-28 1990-09-28 Combination triple duty compressor for prodn. of nitrogen@ and oxygen@ - has multiple shaft machine providing compression for feed air, first main stage, and coolant nitrogen streams Withdrawn DE4030750A1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1050728A1 (en) * 1999-04-30 2000-11-08 Linde Technische Gase GmbH Single column process and device for cryogenic air separation
EP1314941A2 (en) * 2001-11-23 2003-05-28 Messer AGS GmbH Process and device for the production of nitrogen from air
EP1544560A1 (en) * 2003-12-19 2005-06-22 Linde BOC Process Plants LLC Process and apparatus for producing liquid nitrogen
US20130205831A1 (en) * 2010-08-13 2013-08-15 Linde Aktiengesellschaft Method and device for obtaining compressed oxygen and compressed nitrogen by the low-temperature separation of air
WO2015095031A3 (en) * 2013-12-17 2016-02-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude A process for producing liquid nitrogen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1050728A1 (en) * 1999-04-30 2000-11-08 Linde Technische Gase GmbH Single column process and device for cryogenic air separation
EP1314941A2 (en) * 2001-11-23 2003-05-28 Messer AGS GmbH Process and device for the production of nitrogen from air
EP1314941A3 (en) * 2001-11-23 2003-08-27 Messer AGS GmbH Process and device for the production of nitrogen from air
EP1544560A1 (en) * 2003-12-19 2005-06-22 Linde BOC Process Plants LLC Process and apparatus for producing liquid nitrogen
US20130205831A1 (en) * 2010-08-13 2013-08-15 Linde Aktiengesellschaft Method and device for obtaining compressed oxygen and compressed nitrogen by the low-temperature separation of air
US9733014B2 (en) * 2010-08-13 2017-08-15 Linde Aktiengesellschaft Method and device for obtaining compressed oxygen and compressed nitrogen by the low-temperature separation of air
WO2015095031A3 (en) * 2013-12-17 2016-02-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude A process for producing liquid nitrogen

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