DE102011113671A1 - Method for cryogenic separation of air in distillation column system for nitrogen-oxygen separation, involves using portion of overhead gas of high pressure column as heating fluid in low pressure column bottom reboiler - Google Patents
Method for cryogenic separation of air in distillation column system for nitrogen-oxygen separation, involves using portion of overhead gas of high pressure column as heating fluid in low pressure column bottom reboiler Download PDFInfo
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- DE102011113671A1 DE102011113671A1 DE201110113671 DE102011113671A DE102011113671A1 DE 102011113671 A1 DE102011113671 A1 DE 102011113671A1 DE 201110113671 DE201110113671 DE 201110113671 DE 102011113671 A DE102011113671 A DE 102011113671A DE 102011113671 A1 DE102011113671 A1 DE 102011113671A1
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- pressure column
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- air stream
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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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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
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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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- F25J3/04163—Hot end purification of the feed air
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- 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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- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
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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
- F25J2250/40—One fluid being 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
- 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)
- 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
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method according to the preamble of
Als ”Kondensator-Verdampfer” wird ein Wärmetauscher bezeichnet, in dem ein erster kondensierender Fluidstrom in indirekten Wärmeaustausch mit einem zweiten verdampfenden Fluidstrom tritt. Jeder Kondensator-Verdampfer weist einen Verflüssigungsraum und einen Verdampfungsraum auf, die aus Verflüssigungspassagen beziehungsweise Verdampfungspassagen bestehen. In dem Verflüssigungsraum wird die Kondensation (Verflüssigung) eines ersten Fluidstroms durchgeführt, in dem Verdampfungsraum die Verdampfung eines zweiten Fluidstroms. Verdampfungs- und Verflüssigungsraum werden durch Gruppen von Passagen gebildet, die untereinander in Wärmeaustauschbeziehung stehen.The term "condenser-evaporator" refers to a heat exchanger in which a first condensing fluid stream undergoes indirect heat exchange with a second evaporating fluid stream. Each condenser-evaporator has a liquefaction space and an evaporation space, which consist of liquefaction passages or evaporation passages. In the liquefaction space, the condensation (liquefaction) of a first fluid flow is performed, in the evaporation space the evaporation of a second fluid flow. Evaporation and liquefaction space are formed by groups of passages that are in heat exchange relationship with each other.
Ein Kondensator-Verdampfer kann beispielsweise als Fallfilm- oder Badverdampfer ausgebildet sein. Bei einem ”Fallfilmverdampfer” strömt das zu verdampfende Fluid von oben nach unten durch den Verdampfungsraum und wird dabei teilweise verdampft. Bei einem ”Badverdampfer” (gelegentlich auch ”Umlaufverdampfer” oder Thermosiphon-Verdampfer” genannt) steht der Wärmetauscherblock in einem Flüssigkeitsbad des zu verdampfenden Fluids. Dieses strömt mittels des Thermosiphon-Effekts von unten nach oben durch die Verdampfungspassagen und tritt oben als Zwei-Phasen-Gemisch wieder aus. Die verbleibende Flüssigkeit strömt außerhalb des Wärmetauscherblocks in das Flüssigkeitsbad zurück. (Bei einem Badverdampfer kann der Verdampfungsraum sowohl die Verdampfungspassagen als auch den Außenraum um den Wärmetauscherblock umfassen.)A condenser-evaporator may be formed, for example, as a falling film or bath evaporator. In a "falling-film evaporator", the fluid to be evaporated flows from top to bottom through the evaporation space and is partially evaporated. In a "bath evaporator" (sometimes called "circulation evaporator" or thermosiphon evaporator "), the heat exchanger block is in a liquid bath of the fluid to be evaporated. This flows by means of the thermosiphon effect from bottom to top through the evaporation passages and exits the top again as a two-phase mixture. The remaining liquid flows outside the heat exchanger block back into the liquid bath. (In a bath evaporator, the evaporation space may include both the evaporation passages and the outside space around the heat exchanger block.)
Die Kondensator-Verdampfer für die Niederdrucksäule (der Niederdrucksäulen-Zwischenverdampfer und der Niederdrucksäulen-Sumpfverdampfer) können im Inneren der Niederdrucksäule angeordnet sein oder einem oder mehreren separaten Behältern.The condenser-evaporators for the low-pressure column (the low-pressure column intermediate evaporator and the low-pressure column bottom evaporator) may be arranged in the interior of the low-pressure column or one or more separate containers.
Die Hochdrucksäule und die Niederdrucksäule bilden jeweils eine Trennsäule im verfahrenstechnischen Sinne. Sie sind regelmäßig in jeweils einem Behälter angeordnet. Alternativ kann jede Säule auf zwei oder mehrere Behälter verteilt angeordnet sein, die entsprechend verbunden sind (zum Beispiel ”geteilte Niederdrucksäule” wie aus
Der Einsatz für den Nebenkondensator wird entweder durch einen Teil der Sumpfflüssigkeit der Niederdrucksäule gebildet, die auch in den Verdampfungsraum des Niederdrucksäulen-Sumpfverdampfer eintritt; diese Verfahrensführung wird regelmäßig gewählt, wenn der Niederdrucksäulen-Sumpfverdampfer als Badverdampfer ausgebildet ist. Alternativ wird – zum Beispiel beim Einsatz eines Fallfilmverdampfers – die Sumpfflüssigkeit der Niederdrucksäule, die von dem untersten Stoffaustauschelement abläuft, in den Fallfilmverdampfer eingeführt, und der nicht verdampfte Anteil der Niederdrucksäulen-Sumpfflüssigkeit, der unten aus dem Niederdrucksäule austritt, wird mindestens teilweise dem Nebenkondensator zugeführt.The insert for the secondary condenser is formed either by a part of the bottom liquid of the low-pressure column, which also enters the evaporation chamber of the low-pressure column bottom evaporator; This procedure is chosen regularly when the low-pressure column bottom evaporator is designed as a bath evaporator. Alternatively, for example when employing a falling film evaporator, the bottom liquid of the low pressure column draining from the bottom mass transfer element is introduced into the falling film evaporator, and the unvaporized portion of the low pressure column bottom liquid exiting the bottom of the low pressure column is at least partially fed to the side condenser ,
Bei einem klassischen Verfahren mit zwei Kondensator-Verdampfern für die Niederdrucksäule wird der Niederdrucksäulen-Sumpfverdampfer mit einem Luftstrom beheizt; dies ist ungünstig für die Trennleistung, weil ein Teil der Luft vorverflüssigt wird und deshalb nicht mehr an der Vortrennung in der Hochdrucksäule teilnimmt. Aus
Der Erfindung liegt die Aufgabe zugrunde, ein derartiges Verfahren und eine entsprechende Vorrichtung so zu gestalten, dass sie energetisch besonders günstig zu betrieben sind.The invention has for its object to make such a method and a corresponding device so that they are operated energetically particularly favorable.
Diese Aufgabe wird dadurch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. This object is achieved by the characterizing features of
Bei dem Verfahren der Erfindung kann auf einen Kaltverdichter verzichtet werden und es wird auch keine Luft im Niederdrucksäulen-Sumpfverdampfer vorverflüssigt. Der Verflüssigungsraum des Niederdrucksäulen-Sumpfverdampfers wird dabei unter etwa dem Druck des Kopfs der zweiten Hochdrucksäule betrieben; jedenfalls wird das Kopfgas der zweiten Hochdrucksäule vor der Einleitung in den Niederdrucksäulen-Sumpfverdampfer nicht verdichtet, sondern tritt vorzugsweise unter seinem natürlichen Druck in dessen Verflüssigungsraum ein.In the method of the invention can be dispensed with a cold compressor and it is also no air in the low-pressure column bottom evaporator pre-liquefied. The liquefaction chamber of the low-pressure column bottom evaporator is operated at about the pressure of the head of the second high-pressure column; In any case, the top gas of the second high-pressure column is not compressed before being introduced into the low-pressure column bottom evaporator, but preferably enters its liquefaction space under its natural pressure.
Nun erscheint es auf den ersten Blick widersinnig zu sein, einen solchen Aufwand zu betreiben, der im Vergleich zum Einsatz eines Kaltverdichters sehr hoch zu sein scheint, nämlich eine zusätzliche Trennkolonne einzusetzen – die zweite Hochdrucksäule – und außerdem einen Teil der Luft auf höheren Druck zu verdichten. Im Rahmen der Erfindung hat sich jedoch herausgestellt, dass die Energieseinsparung überraschend hoch ist und sich tatsächlich ein erheblicher Vorteil ergibt, der den zusätzlichen Aufwand rechtfertigt.Now it seems at first glance to be absurd to operate such an effort, which seems to be very high compared to the use of a cold compressor, namely to use an additional separation column - the second high-pressure column - and also a part of the air to higher pressure compacted. In the context of the invention, however, it has been found that the Energy saving is surprisingly high and actually results in a significant advantage that justifies the extra effort.
Vorzugsweise wird in dem Nebenkondensator Luft als Heizmedium eingesetzt, indem in dem Nebenkondensator ein dritter Einsatzluftstrom mindestens teilweise kondensiert wird, der insbesondere unter einem dritten Druck steht, der höher ist als der erste Druck. Beispielsweise ist der dritte Druck gleich dem zweiten Druck und der zweite und der dritte Einsatzluftstrom werden aus einem gemeinsamen Luftteilstrom abgezweigt, der vorher auf einen entsprechend erhöhten Druck gebracht worden ist.Preferably, air is used as the heating medium in the secondary condenser by at least partially condensing a third feed air stream in the secondary condenser, which is in particular below a third pressure which is higher than the first pressure. For example, the third pressure is equal to the second pressure and the second and the third feed air stream are diverted from a common partial air flow, which has previously been brought to a correspondingly increased pressure.
Drücke werden hier als ”gleich” bezeichnet, wenn der Druckunterschied zwischen den entsprechenden Stellen nicht größer als die natürlichen Leitungsverluste sind, die durch Druckverluste in Rohrleitungen, Wärmetauschern, Kühlern, Adsorbern etc. sind.Pressures are referred to herein as "equal" when the pressure differential between the respective locations is not greater than the natural conduction losses due to pressure losses in piping, heat exchangers, coolers, adsorbers, etc.
Im Rahmen der Erfindung ist es günstig, wenn der erste Einsatzluftstrom lediglich auf den ersten Druck (plus Leitungsverlusten) verdichtet und nur der zweite (gegebenenfalls gemeinsam mit dem dritten) Einsatzluftstrom auf den entsprechend höheren zweiten Druck (plus Leitungsverlusten) verdichtet beziehungsweise nachverdichtet wird. Dies wird besonders vorteilhaft durch die Merkmale des Patentanspruchs 3 bewerkstelligt.In the context of the invention, it is favorable if the first feed air stream is compressed only to the first pressure (plus line losses) and only the second (optionally together with the third) feed air stream is compressed or recompressed to the correspondingly higher second pressure (plus line losses). This is accomplished particularly advantageously by the features of
Grundsätzlich können die Einsatzluftströme gemeinsam und dem niedrigeren Druckniveau einer gemeinsamen Luftreinigung zugeführt werden. In vielen Fällen ist es aber günstiger, zwei getrennte Reinigungsvorrichtungen vorzusehen, die unter den beiden unterschiedlichen Drücken betrieben werden, wie es an sich aus
Vorzugsweise ist der dritte Druck (im Verflüssigungsraum des Nebenkondensators) gleich dem zweiten Druck (beim Eintritt des zweiten Einsatzluftstroms in die zweite Hochdrucksäule).Preferably, the third pressure (in the liquefaction space of the secondary condenser) is equal to the second pressure (when the second feed air flow enters the second high-pressure column).
Verfahrenskälte für den Ausgleich von Austausch- und Isolierungsverlusten und gegebenenfalls für die Produktverflüssigung kann bei dem Verfahren beispielsweise durch eine Einblaseturbine gewonnen werden, indem ein vierter Einsatzluftstrom arbeitsleistend entspannt und in die Niederdrucksäule eingeleitet wird. Der vierte Einsatzluftstrom kann beispielsweise auf dasselbe Druckniveau wie der erste Einsatzluftstrom für die erste Hochdrucksäule verdichtet und etwa unter dem ersten Druck der entsprechenden Entspannungsmaschine zugeleitet werden.Process cooling for the compensation of exchange and insulation losses and optionally for the product liquefaction can be obtained in the process, for example, by a Einblaseturbine by a fourth feed air stream is working expanded and introduced into the low pressure column. The fourth feed air stream can, for example, be compressed to the same pressure level as the first feed air stream for the first high-pressure column and fed to the corresponding expansion machine at approximately the first pressure.
Zusätzlich oder vorzugsweise alternativ kann Kälte durch eine Druckstickstoff-Turbine gewonnen werden, indem ein stickstoffangereicherter Strom aus einer Hochdrucksäule des Destilliersäulen-Systems zur Stickstoff-Sauerstoff-Trennung arbeitsleistend entspannt und der arbeitsleistend entspannte stickstoffangereicherte Strom in dem Hauptwärmetauscher angewärmt wird. Der stickstoffangereicherte Strom stammt vorzugsweise aus der ersten Hochdrucksäule und wird insbesondere ohne Maßnahmen zur Druckänderung zu der entsprechenden Entspannungsmaschine geführt; deren Eintrittsdruck ist also gleich dem Betriebsdruck der ersten Hochdrucksäule (minus Leitungsverlusten).Additionally or preferably alternatively, cold can be obtained by a pressurized nitrogen turbine by performing a nitrogen-enriched stream from a high pressure column of the distillation column nitrogen-oxygen separation system and warming the work-expanded nitrogen-enriched stream in the main heat exchanger. The nitrogen-enriched stream preferably originates from the first high-pressure column and is conducted to the corresponding expansion machine, in particular without measures for changing the pressure; their inlet pressure is therefore equal to the operating pressure of the first high-pressure column (minus line losses).
Dabei ist es günstig, wenn mindestens ein Teil des angewärmten stickstoffangereicherten Stroms als Regeneriergas in einer Reinigungseinrichtung für Einsatzluft eingesetzt wird. Dies stellt nicht nur eine nutzbringende Verwendung des arbeitsleistend entspannten Stroms dar, sondern entkoppelt auch den Niederdrucksäulendruck von dem Druckverlust, den das Regeneriergas in der Reinigungseinrichtung erfährt. Weil das Regeneriergas nicht wie sonst üblich aus der Niederdrucksäule entnommen wird, kann der Niederdrucksäulendruck entsprechend niedriger sein, und damit das gesamte Druckniveau abgesenkt werden. Dies erhöht die energetische Effizienz des Prozesses weiter.It is advantageous if at least a portion of the warmed nitrogen-enriched stream is used as a regeneration gas in a cleaning device for feed air. This not only constitutes a beneficial use of the work-stream decompressed stream, but also decouples the low-pressure column pressure from the pressure loss experienced by the regeneration gas in the purifier. Because the regeneration gas is not taken from the low-pressure column as usual, the low-pressure column pressure can be correspondingly lower, and thus the entire pressure level can be lowered. This further increases the energy efficiency of the process.
Weiter Energie gespart werden kann durch Einsatz von Fallfilmverdampfers als Kondensator-Verdampfer der Niederdrucksäule. Insbesondere der Niederdrucksäulen-Zwischenverdampfer und/oder Niederdrucksäulen-Sumpfverdampfer können als Fallfilmverdampfer ausgestaltet sein. Der Nebenkondensator kann dagegen als Badverdampfer ausgestaltet werden.Further energy can be saved by using falling film evaporator as a condenser-evaporator of the low pressure column. In particular, the low-pressure column intermediate evaporator and / or low-pressure column bottom evaporator can be designed as a falling film evaporator. By contrast, the secondary condenser can be designed as a bath evaporator.
Bei dem Verfahren der Erfindung kann zusätzlich eine dritte Hochdrucksäule eingesetzt werden, die unter höherem Druck als die zweite Hochdrucksäule betrieben wird, Ihr Kopfgas wird dann als Heizmittel für den Nebenkondensator eingesetzt. Entsprechend geringer wird die Vorverflüssigung von Luft.In addition, in the method of the invention, a third high-pressure column operated at a higher pressure than the second high-pressure column can be used, and its head gas is then used as a heating medium for the secondary condenser. The pre-liquefaction of air is correspondingly lower.
Die Erfindung betrifft außerdem eine Vorrichtung gemäß Patentanspruch 11. Die erfindungsgemäße Vorrichtung kann durch Vorrichtungsmerkmale ergänzt werden, die den Merkmalen der abhängigen Verfahrensansprüche entsprechen. The invention also relates to a device according to claim 11. The device according to the invention can be supplemented by device features which correspond to the features of the dependent method claims.
Die Erfindung sowie weitere Einzelheiten der Erfindung werden im Folgenden anhand von in den Zeichnungen schematisch dargestellten Ausführungsbeispielen näher erläutert. Hierbei zeigen:The invention and further details of the invention are explained below with reference to embodiments schematically illustrated in the drawings. Hereby show:
Atmosphärische Luft
Der zweite Luftteilstrom
Der erste Luftteilstrom wird in einer ersten Reinigungseinrichtung
Die erste Hochdrucksäule
Der vorgekühlte zweite Luftteilstrom
Der mindestens teilweise, vorzugsweise im Wesentlichen vollständig kondensierte dritte Teilstrom
Stickstoffreiches Kopfgas
Ein zweiter Teil
Stickstoffreiches Kopfgas
Die Sumpfflüssigkeiten
Die Sumpfflüssigkeit
Eine flüssige Zwischenfraktion
Am Kopf der Niederdrucksäule
Kälte wird hier nicht durch eine Druckstickstoff-Turbine, sondern durch eine Einblaseturbine
Die Luftverdichtung ist hier einfacher ausgeführt als in Figur und weist insbesondere nur eine einzige Reinigungseinrichtung
Die Aufteilung in den ersten Luftteilstrom
Neben dem ersten Luftteilstrom
Der Nebenkondensator
Statt der Druckstickstoff-Turbine
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
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- US 2003159810 A1 [0046] US 2003159810 A1 [0046]
- WO 03012352 A2 [0046] WO 03012352 A2 [0046]
- DE 102007003437 A1 [0046] DE 102007003437 A1 [0046]
Claims (11)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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DE201110113671 DE102011113671A1 (en) | 2011-09-20 | 2011-09-20 | Method for cryogenic separation of air in distillation column system for nitrogen-oxygen separation, involves using portion of overhead gas of high pressure column as heating fluid in low pressure column bottom reboiler |
PCT/EP2012/003944 WO2013041229A1 (en) | 2011-09-20 | 2012-09-20 | Method and device for the cryogenic decomposition of air |
EP12762536.6A EP2758734B1 (en) | 2011-09-20 | 2012-09-20 | Method and device for cryogenic decomposition of air |
PL12762536T PL2758734T3 (en) | 2011-09-20 | 2012-09-20 | Method and device for cryogenic decomposition of air |
US14/345,840 US10443931B2 (en) | 2011-09-20 | 2012-09-20 | Method and device for the cryogenic decomposition of air |
CN201280046019.9A CN103998883B (en) | 2011-09-20 | 2012-09-20 | The method and apparatus of low temperature air separating |
AU2012311959A AU2012311959B2 (en) | 2011-09-20 | 2012-09-20 | Method and device for the cryogenic decomposition of air |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE201110113671 DE102011113671A1 (en) | 2011-09-20 | 2011-09-20 | Method for cryogenic separation of air in distillation column system for nitrogen-oxygen separation, involves using portion of overhead gas of high pressure column as heating fluid in low pressure column bottom reboiler |
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DE102011113671A1 true DE102011113671A1 (en) | 2013-03-21 |
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