DE20319823U1 - Device for extracting krypton and / or xenon by cryogenic decomposition - Google Patents
Device for extracting krypton and / or xenon by cryogenic decomposition Download PDFInfo
- Publication number
- DE20319823U1 DE20319823U1 DE20319823U DE20319823U DE20319823U1 DE 20319823 U1 DE20319823 U1 DE 20319823U1 DE 20319823 U DE20319823 U DE 20319823U DE 20319823 U DE20319823 U DE 20319823U DE 20319823 U1 DE20319823 U1 DE 20319823U1
- Authority
- DE
- Germany
- Prior art keywords
- krypton
- xenon
- column
- discharge column
- methane discharge
- 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.)
- Expired - Lifetime
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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
- F25J3/04254—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
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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
- F25J3/0409—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
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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
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- 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
- F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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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
- F25J3/04248—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
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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
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- 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
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- F25J3/04472—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
- F25J3/04496—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist
- F25J3/04503—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems
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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
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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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04654—Producing crude argon in a crude argon column
- F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
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- F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
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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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04654—Producing crude argon in a crude argon column
- F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
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- F25J3/04703—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser being arranged in more than one vessel
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- 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
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- F25J3/04642—Recovering noble gases from air
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- F25J3/04642—Recovering noble gases from air
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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
- F25J2250/02—Bath type boiler-condenser using thermo-siphon effect, e.g. with natural or forced circulation or pool boiling, i.e. core-in-kettle heat exchanger
-
- 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
- F25J2250/04—Down-flowing type boiler-condenser, i.e. with evaporation of a falling liquid film
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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)
Abstract
Vorrichtung zur Gewinnung von Krypton und/oder Xenon durch Tieftemperaturzerlegung, mit
– einer ersten Einsatzleitung (201) zum Einleiten einer krypton- und xenonhaltigen Fraktion (13, 14, 15, 16, 26, 121) in eine Methan-Ausschleussäule (24) unterhalb des Kopfes,
– einer Rücklaufleitung (23) zum Aufgeben einer flüssige Sauerstofffraktion, die eine sehr geringe Krypton- und Xenon-Konzentration aufweist, auf den Kopf der Methan-Ausschleussäule (24),
– einer Produktleitung (125) zum Entnehmen eines Krypton-Xenon-Konzentrats aus dem unteren Bereich der Methan-Ausschleussäule (24) und
– einer Kopfgasleitung (30) zum Entnehmen eines methanhaltigen Dampfes aus dem oberen Bereich der Methan-Ausschleussäule (24), dadurch gekennzeichnet, dass
– die erste Einsatzleitung (201) mit einer Zwischenstelle der Methan-Ausschleussäule (24) verbunden ist, die mindestens einen theoretischen oder praktischen Boden oberhalb des Sumpfs angeordnet ist.Device for the extraction of krypton and / or xenon by cryogenic decomposition, with
A first application line (201) for introducing a krypton- and xenon-containing fraction (13, 14, 15, 16, 26, 121) into a methane discharge column (24) below the head,
A return line (23) for feeding a liquid oxygen fraction, which has a very low krypton and xenon concentration, to the top of the methane discharge column (24),
- A product line (125) for removing a krypton-xenon concentrate from the lower region of the methane discharge column (24) and
- A head gas line (30) for removing a methane-containing vapor from the upper region of the methane discharge column (24), characterized in that
- The first application line (201) is connected to an intermediate point of the methane discharge column (24), which is arranged at least one theoretical or practical floor above the sump.
Description
Die Erfindung betrifft eine Vorrichtung gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device according to the generic term of claim 1.
Krypton und Xenon werden im Allgemeinen im Anschluss an eine Tieftemperaturzerlegung von Luft in einem Rektifiziersystem zur Stickstoff-Sauerstoff-Trennung gewonnen.Krypton and Xenon are generally used in Connection to a low temperature separation of air in a rectification system for nitrogen-oxygen separation won.
Die Grundlagen der Tieftemperatuzerlegung von Luft im Allgemeinen sowie der Aufbau von Rektifiziersystemen zur Stickstoff-Sauerstoff-Trennung 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. Die Erfindung kann im Zusammenhang mit einem Einzelsäulen-Verfahren oder einem Zwei- oder Mehr-Säulen-Verfahren zur Stickstoff-Sauerstoff-Trennung eingesetzt werden. Bei einem Zwei-Säulen-Verfahren wird beispielsweise eine Hochdrucksäule unter einem höheren Druck als eine Niederdrucksäule betrieben; die beiden Säulen stehen vorzugsweise in Wärmeaustauschbeziehung zueinander, beispielsweise über einen Hauptkondensator, in dem Kopfgas der Hochdrucksäule gegen verdampfende Sumpfflüssigkeit der Niederdrucksäule verflüssigt wird. Das Rektifiziersystem zur Stickstoff-Sauerstoff-Trennung kann als klassisches Doppelsäulensystem ausgebildet sein, aber auch als Drei- oder Mehr-Säulensystem. Zusätzlich zu den Kolonnen zur Stickstoff-Sauerstoff-Trennung können weitere Vorrichtungen zur Gewinnung anderer Luftkomponenten, insbesondere von Edelgasen aufweisen, beispielsweise eine Argongewinnung. Grundsätzlich kann die erfindungsgemäße Krypton-/Xenon-Gewinnung auch unabhängig von einer Luftzerlegungsanlage betrieben werden.The basics of low temperature decomposition of Air in general and the construction of rectification systems for Nitrogen-oxygen separation in particular are in the monograph "Low Temperature Technology" by Hausen / Linde (2nd edition, 1985) and in an article by Latimer in Chemical Engineering Progress (Vol. 63, No.2, 1967, page 35). The The invention can be used in connection with a single column process or a two or more column process for nitrogen-oxygen separation be used. For example, in a two-column process a high pressure column under a higher one Pressure as a low pressure column operated; the two pillars are preferably in heat exchange relationship to each other, for example about a main condenser, in the top gas against the high pressure column evaporating swamp liquid the low pressure column is liquefied. The rectification system for nitrogen-oxygen separation can be used as classic double column system be designed, but also as a three or more column system. additionally to the columns for nitrogen-oxygen separation can more Devices for extracting other air components, in particular of noble gases, for example argon production. Basically can the krypton / xenon extraction according to the invention also independently operated by an air separation plant.
Bei den bisher bekannten Methoden
zur Krypton-/Xenon-Gewinnung wird zum Beispiel eine Sumpftraktion
der Niederdrucksäule
oder der Hochdrucksäule
eines Zwei-Säulen-Systems zur Stickstoff-Sauerstoff-Trennung – gegebenenfalls
nach Durchlaufen von Zwischenschritten – in eine Methan-Ausschleussäule eingeleitet,
auf deren Kopf Krypton-/Xenon-armer Flüssigsauerstoff aufgegeben wird.
Damit kann das Methan, das sich im Sumpf der Niederdrucksäule ansammelt
mit dem gasförmigen Kopfprodukt
der Methan-Ausschleussäule
aus dem Verfahren entfernt werden. Das Sumpfprodukt der Methan-Ausschleussäule enthält nur noch äußerst geringe
Mengen an Methan und ist an Krypton und Xenon angereichert. Es kann
entweder direkt aus der Methan-Ausschleussäule als
Krypton-/Xenon-Vorkonzentrat abgezogen oder in die Niederdrucksäule zurückgeleitet
und von dort als Vorkonzentrat abgezogen werden, Diese Verfahrensweise
ist an sich bekannt und beispielsweise in Hausen/Linde, Tieftemperaturtechnik,
2. Auflage, 1985, Seiten 337 ff., in
Das erzeugte Krypton-Xenon-Konzentrat kann an Ort und Stelle in weiteren Verfahrensschritten zu reinem Krypton und/oder Xenon getrennt werden. Alternativ wird es gespeichert, zum Beispiel in einem Flüssigtank, und an einem anderen Ort weiterverarbeitet.The krypton-xenon concentrate produced can on the spot in further process steps to pure krypton and / or xenon are separated. Alternatively, it is saved for example in a liquid tank, and processed at another location.
Die bekannte Verfahrensweise ist für streng stationären Betrieb optimal, kann aber bei Störungen oder Schwankungen der Betriebsbedingungen Probleme aufwerten. Insbesondere können Krypton und Xenon gelegentlich zum Kopf der Methan-Ausschleussäule durchbrechen und gehen dann für die Produktion verloren.The known procedure is for strictly stationary operation optimal, but can in case of malfunctions or Fluctuations in operating conditions add to problems. In particular can Break through krypton and xenon occasionally to the top of the methane discharge column and then go for lost production.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art anzugeben, welches eine konstant hohe Ausbeute an Krypton und/oder Xenon ermöglicht.The invention is therefore the object based on specifying a device of the type mentioned at the outset, which enables a consistently high yield of krypton and / or xenon.
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Schutzanspruchs 1 gelöst. Die krypton- und xenonhaltige Fraktion wird dabei mindestens zum Teil und mindestens zeitweise an einer Zwischenstelle in die Methan-Ausschleussäule eingeleitet, die mindestens einen theoretischen oder praktischen Boden oberhalb des Sumpfs angeordnet ist.This task is characterized by the Features of the protection claim 1 solved. The krypton and xenon Fraction is at least partially and at least temporarily introduced into the methane discharge column at an intermediate point, the at least one theoretical or practical floor above the swamp is arranged.
Es befindet sich also auch unterhalb der Zuspeisung der Einsatzfraktion ein Stoffaustauschabschnitt. Dieser weist ein erheblich höheres Rücklaufverhältnis als der obere Bereich der Methan-Ausschleussäule auf. Krypton, Xenon und andere schwerer als Sauerstoff flüchtige Komponenten werden dadurch höchst wirksam im Sumpf der Methan-Ausschleussäule zurückgehalten, insbesondere auch bei leicht schwankenden Betriebsbedingungen.So it is also below a feed-in section a mass transfer section. This shows a significantly higher one Reflux ratio as the upper area of the methane discharge column. Krypton, Xenon and this makes other components that are more volatile than oxygen maximum effectively retained in the bottom of the methane discharge column, in particular also with slightly fluctuating operating conditions.
Für den Fall, dass in dem betreffenden Abschnitt ausschließlich praktische Böden als Stoffaustauschelemente verwendet werden, gelten oben und im Folgenden die Angaben in praktischen Bodenzahlen; falls Packung, Füllkörper oder Kombinationen verschiedener Typen von Stoffaustauschelementen eingesetzt werden, sind die Angaben in theoretischen Bodenzahlen anzuwenden.For the case that the section in question is only practical Floors as Mass transfer elements used apply above and below the information in practical soil numbers; if packing, packing or Combinations of different types of mass transfer elements are used the information in theoretical soil numbers are to be applied.
Es ist günstig, wenn die Zwischenstelle 1 bis 5 theoretische beziehungsweise praktische Böden, insbesondere 2 bis 3 theoretische beziehungsweise praktische Böden oberhalb des Sumpfs der Methan-Ausschleussäule angeordnet ist. Im Allgemeinen genügen 2 bis 3 praktische Böden.It is convenient if the intermediary 1 to 5 theoretical or practical floors, in particular 2 to 3 theoretical or practical floors above the bottom of the methane discharge column is arranged. In general suffice 2 to 3 practical shelves.
Im Normalbetrieb wird vorzugsweise die gesamte krypton- und xenonhaltige Fraktion an der Zwischenstelle der Methan-Ausschleussäule eingespeist. Falls zeitweise ein relativ hoher Gehalt an Schwerertlüchtigen an der Quelle der krypton- und xenonhaltigen Fraktion auftritt (insbesondere im Hauptkondensator eines Rektifiziersystems zur Stickstoff-Sauerstoff-Trennung), ist es jedoch günstig, wenn die krypton- und xenonhaltige Fraktion mindestens zum Teil und mindestens zeitweise an einer Stelle in die Methan-Ausschleussäule eingeleitet wird, die mindestens einen theoretischen oder praktischen Boden unterhalb der Zwischenstelle, insbesondere unmittelbar am Sumpf der Methan-Ausschleussäule angeordnet ist. Für die Zeit der Einspeisung in den Sumpf muss man zwar eine geringfügig verringerte Ausbeute an Krypton und/oder Xenon in Kauf nehmen; dafür wird die erhöhte Konzentration an Schwerertlüchtigen besonders schnell abgebaut, was den Betrieb der Anlage besonders sicher macht. Die Anlage weist dazu eine entsprechende Regeleinrichtung auf, welche die Einspeisung bei Bedarf zwischen den beiden Möglichkeiten umschaltet beziehungsweise aufteilt.In normal operation, the entire krypton- and xenon-containing fraction is preferably fed in at the intermediate point of the methane discharge column. If at times a relatively high content of heavy volatiles occurs at the source of the krypton- and xenon-containing fraction (especially in the main condenser of a rectification system for Nitrogen-oxygen separation), however, it is favorable if the krypton- and xenone-containing fraction is introduced at least in part and at least temporarily at one point into the methane discharge column, which has at least one theoretical or practical base below the intermediate point, in particular immediately on Bottom of the methane discharge column is arranged. A slight decrease in the yield of krypton and / or xenon has to be accepted for the time of feeding into the swamp; the increased concentration of hard-working people is broken down very quickly, which makes the operation of the plant particularly safe. For this purpose, the system has a corresponding control device, which switches over or divides the feed between the two options if necessary.
Die Erfindung betrifft außerdem eine Vorrichtung zur Gewinnung von Krypton und/oder Xenon durch Tieftemperaturzerlegung gemäß den Patentansprüchen 4 bis 7.The invention also relates to a Device for extracting krypton and / or xenon by cryogenic decomposition according to claims 4 to 7th
Die Erfindung sowie weitere Einzelheiten der Erfindung werden im Folgenden anhand von in den Zeichnungen dargestellten Ausführungsbeispielen näher erläutert. Hierbei zeigen:The invention and further details The invention are described below with reference to the drawings illustrated embodiments explained in more detail. in this connection demonstrate:
Über
Leitung
Die sauerstoffangereicherte Sumpfflüssigkeit
Der erste Kondensator-Verdampfer
Verbleibende Flüssigkeit wird als "Spülflüssigkeit"
Die Krypton-Xenon-Anreicherungssäule
Vom Sumpf der Krypton-Xenon-Anreicherungssäule
Von der Niederdrucksäule
Der flüssige Sauerstoff
Mindestens ein Teil
Verdampfung und Anwärmung können beispielsweise
in indirektem Wärmeaustausch
mit einem Hochdruckluftstrom durchgeführt werden. Im Ausführungsbeispiel
wird dazu jedoch ein Stickstoff-Kreislauf eingesetzt, der gleichzeitig
zur Erzeugung von Verfahrenskälte
zum Ausgleich von Austausch- und Isolationsverlusten sowie zur Produktverflüssigung
dient. Hierbei ist das Linde-VARIPOX°-Verfahren realisiert, das die
Erzeugung variabler Mengen an Drucksauerstoff bei stationärem Betrieb
des Rektifiziersystems erlaubt. Dieser Prozess ist in
Der Kreislauf wird durch einen Teil
Ein zweiter Teil
Über
eine Argonübergangs-Leitung
Am Kopf der zweiten Rohargonsäule
Gasförmig verbliebenen Rohargon
Zwischen den Blöcken
In
Über
Leitung
Im Sumpfverdampfer
Die erste Einsatzleitung
In dem folgenden beispielhaften Szenario bildet
der Verdampfungsraum des Hauptkondensators eines Rektifiziersystem
zur Stickstoff-Sauerstoff-Trennung die Quelle der Einsatzfraktion
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20319823U DE20319823U1 (en) | 2003-07-18 | 2003-12-20 | Device for extracting krypton and / or xenon by cryogenic decomposition |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10332862.9 | 2003-07-18 | ||
DE10332862A DE10332862A1 (en) | 2003-07-18 | 2003-07-18 | Cryogenic assembly to extract krypton and/or xenon gas from air has intermediate pipe on the methane removal column alongside a base panel above the sump |
DE20319823U DE20319823U1 (en) | 2003-07-18 | 2003-12-20 | Device for extracting krypton and / or xenon by cryogenic decomposition |
Publications (1)
Publication Number | Publication Date |
---|---|
DE20319823U1 true DE20319823U1 (en) | 2004-04-01 |
Family
ID=32087404
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10332862A Withdrawn DE10332862A1 (en) | 2003-07-18 | 2003-07-18 | Cryogenic assembly to extract krypton and/or xenon gas from air has intermediate pipe on the methane removal column alongside a base panel above the sump |
DE20319823U Expired - Lifetime DE20319823U1 (en) | 2003-07-18 | 2003-12-20 | Device for extracting krypton and / or xenon by cryogenic decomposition |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10332862A Withdrawn DE10332862A1 (en) | 2003-07-18 | 2003-07-18 | Cryogenic assembly to extract krypton and/or xenon gas from air has intermediate pipe on the methane removal column alongside a base panel above the sump |
Country Status (1)
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DE (2) | DE10332862A1 (en) |
Cited By (4)
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---|---|---|---|---|
WO2021230913A1 (en) * | 2020-05-15 | 2021-11-18 | Praxair Technology, Inc. | Enhancements to a moderate pressure nitrogen and argon producing cryogenic air separation unit |
WO2023018429A1 (en) * | 2021-08-11 | 2023-02-16 | Praxair Technology, Inc. | Cryogenic air separation unit with argon condenser vapor recycle |
US11629913B2 (en) | 2020-05-15 | 2023-04-18 | Praxair Technology, Inc. | Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit |
US11933538B2 (en) | 2020-05-11 | 2024-03-19 | Praxair Technology, Inc. | System and method for recovery of nitrogen, argon, and oxygen in moderate pressure cryogenic air separation unit |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009014556A1 (en) | 2009-03-24 | 2010-09-30 | Linde Aktiengesellschaft | Process for heating a separation column |
EP2312248A1 (en) | 2009-10-07 | 2011-04-20 | Linde Aktiengesellschaft | Method and device for obtaining pressurised oxygen and krypton/xenon |
-
2003
- 2003-07-18 DE DE10332862A patent/DE10332862A1/en not_active Withdrawn
- 2003-12-20 DE DE20319823U patent/DE20319823U1/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11933538B2 (en) | 2020-05-11 | 2024-03-19 | Praxair Technology, Inc. | System and method for recovery of nitrogen, argon, and oxygen in moderate pressure cryogenic air separation unit |
WO2021230913A1 (en) * | 2020-05-15 | 2021-11-18 | Praxair Technology, Inc. | Enhancements to a moderate pressure nitrogen and argon producing cryogenic air separation unit |
US11629913B2 (en) | 2020-05-15 | 2023-04-18 | Praxair Technology, Inc. | Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit |
WO2023018429A1 (en) * | 2021-08-11 | 2023-02-16 | Praxair Technology, Inc. | Cryogenic air separation unit with argon condenser vapor recycle |
US11933539B2 (en) | 2021-08-11 | 2024-03-19 | Praxair Technology, Inc. | Cryogenic air separation unit with argon condenser vapor recycle |
Also Published As
Publication number | Publication date |
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DE10332862A1 (en) | 2005-02-10 |
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