DE10339224A1 - Method for cryogenic decomposition of air in rectifier system for separating nitrogen and oxygen involves compressing a third air current with first air current in secondary compressor - Google Patents
Method for cryogenic decomposition of air in rectifier system for separating nitrogen and oxygen involves compressing a third air current with first air current in secondary compressor Download PDFInfo
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- DE10339224A1 DE10339224A1 DE10339224A DE10339224A DE10339224A1 DE 10339224 A1 DE10339224 A1 DE 10339224A1 DE 10339224 A DE10339224 A DE 10339224A DE 10339224 A DE10339224 A DE 10339224A DE 10339224 A1 DE10339224 A1 DE 10339224A1
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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
- F25J3/0423—Subcooling of liquid process streams
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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
- F25J3/04006—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
- F25J3/04084—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 nitrogen
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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
- F25J3/04206—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
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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
- F25J3/04248—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
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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
- F25J3/04406—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
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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
- F25J3/04406—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
- F25J3/04424—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 without thermally coupled high and low pressure columns, i.e. a so-called split columns
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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
- 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
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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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column
- F25J2200/54—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column in the low pressure column of a double pressure main column system
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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
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
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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
- 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
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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
- 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
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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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/20—Boiler-condenser with multiple exchanger cores in parallel or with multiple re-boiling or condensing streams
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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
- 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
- F25J2250/42—One fluid being nitrogen
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Tieftemperaturzerlegung von Luft gemäß dem Oberbegriff des Patentanspruchs 1. Sie bezieht sich auf Zwei- oder Mehr-Säulen-Systeme zur Stickstoff-Sauerstoff-Trennung durch Tieftemperaturzerlegung von Luft, die eine Hochdrucksäule aufweisen sowie eine Niederdrucksäule, die unter niedrigerem Druck als die Hochdrucksäule betrieben wird. Bei Mehr-Säulen-Systemen weist das Rektifiziersystem zur Stickstoff-Sauerstoff-Trennung eine oder mehrere weitere Säulen auf, die unter weiteren Drücken betrieben werden, beispielsweise eine Mitteldrucksäule, die unter einem Zwischendruck zwischen Niederdrucksäulen- und Hochdrucksäulen-Druck betrieben wird. Außerdem können zusätzlich zu den Kolonnen zur Stickstoff-Sauerstoff-Trennung weitere Vorrichtungen zur Gewinnung anderer Luftkomponenten, insbesondere von Edelgasen vorgesehen sein, beispielsweise eine Argongewinnung.The The invention relates to a process for the cryogenic separation of Air according to the generic term of claim 1. It relates to two or more column nitrogen-oxygen separation systems by cryogenic separation of air having a high pressure column and a low pressure column, which is operated under lower pressure than the high pressure column. For multi-column systems has the rectification system for nitrogen-oxygen separation one or several other columns on that under further press operated, for example, a medium-pressure column, the under an intermediate pressure between low pressure column and high pressure column pressure is operated. Furthermore can additionally to the columns for nitrogen-oxygen separation other devices for obtaining other air components, in particular of noble gases be provided, for example, an argon production.
Die Grundlagen der Tieftemperaturzerlegung von Luft im Allgemeinen sowie der Aufbau von Zwei-Säulen-Anlagen im Speziellen sind in der Monografie "Tieftemperaturtechnik" von Hausen/Linde (2. Auflage, 1985) und in einem Aufsatz von Latimer in Chemical Engineering Progress (Vol. 63, No.2, 1967, Seite 35) beschrieben.The Basics of cryogenic decomposition of air in general as well the construction of two-pillar systems In particular, in the monograph "cryogenic technology" by Hausen / Linde (2. Edition, 1985) and in an article by Latimer in Chemical Engineering Progress (Vol. 63, No.2, 1967, page 35).
Einschlägige Prozesse,
bei denen die Gesamtluft nur auf einen ersten Druck verdichtet wird, der
niedriger als Hochdrucksäulendruck
ist, sind aus
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art und eine entsprechende Vorrichtung anzugeben, die wirtschaftlich besonders günstig zu betreiben sind, insbesondere durch einen besonders niedrigen Energieverbrauch.Of the Invention is based on the object, a method of the initially specify type and a corresponding device, the economically particularly favorable are to be operated, in particular by a particularly low Power consumption.
Diese Aufgabe wird dadurch gelöst, dass ein dritter Luftstrom gemeinsam mit dem ersten Luftstrom in dem Nachverdichter auf den zweiten Druck weiterverdichtet, arbeitsleistend entspannt und in das Rektifiziersystem zur Stickstoff-Sauerstoff-Trennung eingeführt wird. Hierdurch brauchen die Rektifiziersäulen – im Unterschied zu einem Verfahren mit Restgasturbine – nicht unter einem erhöhten Druck betrieben zu werden. Der Niederdrucksäulendruck kann bis auf ein knapp überatmosphärisches Niveau abgesenkt werden. Entsprechend weniger Energie wird verbraucht. Gleichzeitig hält sich der apparative Aufwand für die Verdichtung des zusätzlichen dritten Luftstroms in Grenzen, da für diesen Zweck der Nachverdichter eingesetzt wird, der ohnehin für die Weiterverdichtung des ersten Luftstroms benötigt wird.These Task is solved by that a third air flow together with the first air flow in the secondary compressor further compressed on the second pressure, performing work is relaxed and introduced into the rectification system for nitrogen-oxygen separation. This requires the rectification columns - unlike a procedure with residual gas turbine - not under an elevated Pressure to be operated. The low pressure column pressure can be down to one just over-atmospheric Level be lowered. Correspondingly less energy is consumed. Simultaneously holding the equipment required for the compression of the additional third airflow within limits, because for this purpose the booster is used, anyway for the further compression of the first air flow is needed.
Der zweite Luftstrom wird unter "im Wesentlichen" dem ersten Druck abgekühlt, das heißt zwischen der Verdichtung auf den ersten Druck (beispielsweise in einem Hauptluftverdichter) und der Abkühlung werden insbesondere keine druckverändernden Maßnahmen durchgeführt. Zwischen dem Druck der Abkühlung und dem ersten Druck können aber kleinere Druckunterschiede bestehen, die durch Druckverluste in Leitungen und in Apparaten, die nicht dezidiert einer Druckveränderung dienen, auftreten.Of the second air flow is under "im Essentially "the first pressure cooled, this means between the compression at the first pressure (for example in a main air compressor) and the cooling are in particular no pressure changing activities carried out. Between the pressure of cooling and the first pressure but can There are smaller pressure differences caused by pressure losses in Lines and in apparatus that are not decidedly a pressure change serve, occur.
Die Abkühlung des ersten Luftstroms wird vorzugsweise unter im Wesentlichen dem zweiten Druck durchgeführt; kleinere Druckunterschiede wie Druckverluste in Leitungen und in Apparaten, die nicht dezidiert einer Druckveränderung dienen, bleiben dabei ebenfalls unberücksichtigt.The Cooling the first air flow is preferably below substantially second pressure performed; smaller pressure differences such as pressure losses in pipes and in Apparatuses that are not dedicated to pressure change remain also disregarded.
Grundsätzlich können bei der Erfindung die drei Luftströme separat vom Atmosphärendruck auf den "ersten Druck" gebracht werden. In der Regel ist es jedoch günstiger, dafür nur eine einzige Maschine (Hauptluftverdichter) einzusetzen und den ersten, den zweiten und den dritten Luftstrom gemeinsam auf den ersten Druck zu verdichten und anschließend auf diesem Druckniveau zu verzweigen. Der erste Druck kann dabei beispielsweise gleich dem Betriebsdruck der Niederdrucksäule plus Druckverlusten sein.Basically, at the invention, the three air streams separate from the atmospheric pressure on the "first Pressure " become. In general, it is cheaper, but only one single machine (main air compressor) and the first, the second and third airflow together to the first pressure to condense and then on branch this pressure level. The first pressure can be, for example be equal to the operating pressure of the low pressure column plus pressure drops.
Es ist günstig, wenn der dritte Luftstrom stromabwärts der arbeitsleistenden Entspannung in die Niederdrucksäule eingeleitet wird.It is cheap, when the third airflow downstream of the work performing relaxation in the low pressure column is initiated.
Der dritte Luftstrom kann stromabwärts der Nachverdichtung auf den zweiten Druck und stromaufwärts der arbeitsleistenden Entspannung auf einen dritten Druck nachverdichtet werden, insbesondere in einem Bremsgebläse (Turbinen-Booster) unter Verwendung der bei der arbeitsleistenden Entspannung erzeugten mechanischen Energie.Of the third airflow can be downstream the post-compression to the second pressure and upstream of the work-performing relaxation to a third pressure nachverdichtet are, especially in a brake fan (turbine booster) under Use of the mechanical work generated during work relaxation Energy.
Vorzugsweise werden zwischen der Verdichtung des zweiten Luftstroms auf den ersten Druck und der Abkühlung des zweiten Luftstroms keine druckverändernden Maßnahmen durchgeführt, das heißt ein Teil der Luft wird nicht über den ersten Druck (plus Leitungsverlusten) hinaus verdichtet, sondern tritt unter diesem ersten Druck (minus Leitungsverlusten) in den Hauptwärmetauscher ein.Preferably, between the compaction tion of the second air flow to the first pressure and the cooling of the second air flow no pressure-changing measures carried out, that is, a part of the air is not compressed above the first pressure (plus line losses) out, but occurs under this first pressure (minus line losses) in the Main heat exchanger.
Die Erfindung betrifft außerdem eine Vorrichtung zur Tieftemperaturzerlegung von Luft gemäß Patentanspruch 7.The Invention also relates a device for cryogenic separation of air according to claim 7th
Die Erfindung sowie weitere Einzelheiten der Erfindung werden im Folgenden anhand von in den Zeichnungen dargestellten Ausführungsbeispielen näher erläutert. Diese Beispiele zeigen spezielle Rektifiziersysteme zur Stickstoff-Sauerstoff-Trennung; die erfindungsgemäße Verfahrensweise kann jedoch ohne Weiteres auf jedes andere Zwei- oder Mehr-Säulen-System zur Luftzerlegung übertragen werden. Die Zeichnungen zeigen im Einzelnen:The Invention and further details of the invention are hereinafter explained in more detail with reference to exemplary embodiments illustrated in the drawings. These Examples show special rectification systems for nitrogen-oxygen separation; the procedure of the invention However, it can be easily applied to any other two- or multi-column system be transferred to the air separation. The drawings show in detail:
Übereinstimmende beziehungsweise einander entsprechende Verfahrensschritte und Apparateteile tragen in den Zeichnungen dieselben Bezugszeichen.Matching or corresponding process steps and apparatus parts carry in the drawings the same reference numerals.
In
dem Ausführungsbeispiel
der
Der
erste Teilstrom
Der
zweite Teilstrom
Als
weiterer Einsatz für
die Niederdrucksäule
Gasförmiger Kopfstickstoff
In
dem Ausführungsbeispiel
wird das gesamte gasförmige
Kopfprodukt der Niederdrucksäule
Als
Kopfprodukt verlässt
Stickstoffgas
Die
Sumpfflüssigkeit
Der
gepumpte Flüssigstickstoff
Ein
dritter Teilstrom der Luft (der "dritte
Luftstrom") wird
gemeinsam mit dem ersten Luftstrom in dem Nachverdichter
In
Dort
gebildetes Stickstoffgas
Im
Verflüssigungsraum
des Produktverdampfers
Während die
Turbine
In
dem Verfahren von
Das
in
Im
Verflüssigungsraum
des Produktverdampfers
Ein
zweiter Teil
Mit
Hilfe des Sumpfverdampfers
Claims (7)
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DE10339224A DE10339224A1 (en) | 2003-08-26 | 2003-08-26 | Method for cryogenic decomposition of air in rectifier system for separating nitrogen and oxygen involves compressing a third air current with first air current in secondary compressor |
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DE10339224A DE10339224A1 (en) | 2003-08-26 | 2003-08-26 | Method for cryogenic decomposition of air in rectifier system for separating nitrogen and oxygen involves compressing a third air current with first air current in secondary compressor |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3521739A1 (en) * | 2018-02-02 | 2019-08-07 | Linde Aktiengesellschaft | Method and device for generating compressed nitrogen by the cryogenic decomposition of air |
US10436507B2 (en) | 2016-01-21 | 2019-10-08 | Linde Aktiengesellschaft | Process and apparatus for producing pressurized gaseous nitrogen by cryogenic separation of air |
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2003
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10436507B2 (en) | 2016-01-21 | 2019-10-08 | Linde Aktiengesellschaft | Process and apparatus for producing pressurized gaseous nitrogen by cryogenic separation of air |
EP3521739A1 (en) * | 2018-02-02 | 2019-08-07 | Linde Aktiengesellschaft | Method and device for generating compressed nitrogen by the cryogenic decomposition of air |
CN110131963A (en) * | 2018-02-02 | 2019-08-16 | 林德股份公司 | A kind of method and apparatus that pressurized nitrogen is obtained by low temperature air separating |
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