DE102008064117A1 - Air dissecting method for distilling column system, involves withdrawing liquid rinsing stream from lower area of wash column, where cooled auxiliary air flow is essentially liquid-free during introduction into wash column - Google Patents
Air dissecting method for distilling column system, involves withdrawing liquid rinsing stream from lower area of wash column, where cooled auxiliary air flow is essentially liquid-free during introduction into wash column Download PDFInfo
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- DE102008064117A1 DE102008064117A1 DE102008064117A DE102008064117A DE102008064117A1 DE 102008064117 A1 DE102008064117 A1 DE 102008064117A1 DE 102008064117 A DE102008064117 A DE 102008064117A DE 102008064117 A DE102008064117 A DE 102008064117A DE 102008064117 A1 DE102008064117 A1 DE 102008064117A1
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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
- F25J3/04763—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
- F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
- F25J3/04915—Combinations of different material exchange elements, e.g. within different columns
- F25J3/04921—Combinations of different material exchange elements, e.g. within different columns within the same 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
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) 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
- F25J3/0409—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
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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
- F25J3/04242—Cold end purification of the feed 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
- 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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- 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
- F25J3/04248—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
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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
- 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
- F25J3/04321—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 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
- 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
- F25J3/0443—A main column system not otherwise provided, e.g. a modified double column flowsheet
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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
- F25J3/04763—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
- F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
- F25J3/04933—Partitioning walls or sheets
- F25J3/04939—Vertical, e.g. dividing wall columns
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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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
- F25J2200/94—Details relating to the withdrawal point
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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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- F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
- F25J2200/96—Dividing wall column
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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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- F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
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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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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/42—Nitrogen
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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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- 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
- F25J2215/56—Ultra high purity oxygen, i.e. generally more than 99,9% O2
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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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- F25J2220/40—Separating high boiling, i.e. less volatile components from air, e.g. CO2, hydrocarbons
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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
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/50—Separating low boiling, i.e. more volatile components from oxygen, e.g. N2, Ar
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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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- 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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- 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
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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
- 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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- Physics & Mathematics (AREA)
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- Emergency Medicine (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1.The The invention relates to a method according to the preamble of claim 1
Derartige
Verfahren mit Restgasrückführung sind bekannt
aus
Verfahren
und Vorrichtungen zur Tieftemperaturzerlegung von Luft sind allgemein
in
Der Erfindung liegt die Aufgabe zugrunde, eine besonders hohe Stabilität im Betrieb des Verfahrens zu ermöglichen. Insbesondere soll der stabile Betrieb bei jedem Typ von Kondensator-Verdampfer gewährleistet sein, der flüssigen Rücklauf für die erste Trennsäule erzeugt, nicht nur bei Bad- oder Fallfilmverdampfern, sondern auch beim Einsatz eines Forced-Flow-Verdampfers als Kondensator-Verdampfer, speziell auch bei relativ niedrigen Betriebsdrücken.Of the Invention is based on the object, a particularly high stability in the operation of the process. Especially It is designed to ensure stable operation with any type of condenser evaporator its the liquid reflux for the generated first separation column, not only in bath or falling film evaporators, but also when using a forced-flow evaporator as a condenser-evaporator, especially at relatively low operating pressures.
Diese Aufgabe wird durch die Merkmale des kennzeichnenden teils des Anspruchs 1 gelöst.These The object is achieved by the features of the characterizing part of the claim 1 solved.
In der Waschsäule werden dem Einsatzluftstrom die schwererflüchtigen Komponenten entzogen, bevor in die erste Trennsäule gelangt. Das gesamte System stromabwärts der Trennsäule bleibt daher frei von solchen unerwünschten Komponenten. Dadurch brauchen Verdampfer seltener oder gar nicht gespült und/oder angewärmt zu werden. In dem Destilliersäulen-System können dann sogar besonders wirtschaftliche Verdampfertypen wie zum Beispiel Forced-Flow-Verdampfer eingesetzt werden, was bei der Gegenwart von schwererflüchtigen Komponenten nicht möglich wäre.In the scrubbing column will become the less volatile for the feed air stream Components withdrawn before entering the first separation column. The entire system downstream of the separation column therefore remains free of such unwanted components. As a result, evaporators need less or not flushed and / or to be warmed up. In the distillation column system then even very economical evaporator types can as for example forced-flow evaporators are used, what with not the presence of less volatile components it is possible.
Als "schwererflüchtige Komponenten" werden hier grundsätzlich Stoffe bezeichnet, die einen höheren Siedepunkt als Sauerstoff aufweisen. Darunter fallen insbesondere N2O, Propan, Propylen, Ethan, Krypton und Xenon. Methan spielt eine Sonderrolle und wird hier nicht zu den "schwererflüchtigen Komponenten" gerechnet. Als "frei von schwererflüchtigen Komponenten" wird ein Strom bezeichnet, der in der Summe einen geringeren Propan-Gehalt als 1 ppm an solchen schwererflüchtigen Komponenten aufweist, vorzugsweise weniger als 0,1 ppm, höchst vorzugsweise weniger als 0,01 ppm Propan.When "less volatile components" become basic here Substances called having a higher boiling point than oxygen exhibit. These include in particular N 2 O, propane, propylene, ethane, Krypton and xenon. Methane plays a special role and will be here not counted among the "less volatile components". As "free of volatile components" is a Current refers to the sum of a lower propane content than 1 ppm of such less volatile components, preferably less than 0.1 ppm, most preferably less as 0.01 ppm propane.
Das "Destilliersäulen-System" der Erfindung kann als Ein-Säulen-System zur Stickstoff-Sauerstoff-Trennung ausgebildet sein – dann weist es außer der ersten Trennsäule und der Wasch keine weiteren Trennsäulen auf.The "Distillation column system" of the invention can be used as a one-pillar system be designed for nitrogen-oxygen separation - then it shows except the first separation column and the wash no further separation columns.
Alternativ kann es grundsätzlich als Zwei-Säulen-System (zum Beispiel als klassisches Linde-Doppelsäulensystem), oder auch als Drei- oder Mehr-Säulen-System ausgestaltet sein. Das Destilliersäulen-System kann zusätzlich zu den Kolonnen zur Stickstoff-Sauerstoff-Trennung weitere Vorrichtungen zur Gewinnung hochreiner Produkte und/oder anderer Luftkomponenten, insbesondere von Edelgasen aufweisen, beispielsweise eine Argongewinnung und/oder eine Krypton-Xenon-Gewinnung. Zum Destilliersäulen-System gehören außer den Trennsäulen auch Kondensatoren und Verdampfer, die flüssigen Rücklauf beziehungsweise aufsteigenden Dampf für diese Kolonnen erzeugen.alternative It can basically be used as a two-pillar system (for Example as classical Linde double column system), or be designed as a three or more pillar system. The distillation column system can be used in addition to the columns for nitrogen-oxygen separation other devices for obtaining high purity products and / or other air components, in particular of noble gases, for example an argon production and / or krypton-xenon recovery. To the distillation column system In addition to the columns also include capacitors and evaporator, the liquid reflux respectively generate rising steam for these columns.
Die Waschsäule kann in einem separaten Behälter untergebracht oder in eine andere Kolonne integriert sein, beispielsweise in die erste Trennsäule.The Wash column can be housed in a separate container or be integrated into another column, for example in the first separation column.
Der "Hauptwärmetauscher" kann aus einem Wärmetauscherelement als integrierter Einheit bestehen oder aus mehreren untereinander verbundenen Wärmetauscherelementen, zum Beispiel aus einem oder mehreren Plattenwärmetauscherblöcken.Of the "Main heat exchanger" can be made of a heat exchanger element consist of an integrated unit or of several with each other connected heat exchanger elements, for example from a or more plate heat exchanger blocks.
Unter "im Wesentlichen flüssigkeitsfrei" wird hier ein Strom verstanden, dessen Flüssigkeitsanteil geringer als 1 mol-%, vorzugsweise geringer als 0,1 mol-% ist. Noch besser ist es, wenn der Einsatzluftstrom bei der Einspeisung in die Waschsäule überhaupt keine Flüssigkeit enthält oder sogar leicht überhitzt ist.Under "essentially liquid-free" becomes a current here understood whose liquid content is less than 1 mol%, preferably less than 0.1 mol%. It is even better if the feed air stream at the feed into the wash column at all contains no liquid or even slightly overheated is.
Das
in
Auch bei dem erfindungsgemäßen Verfahren kann die Vorverflüssigung nicht vermieden werden. Trotzdem enthält der Einsatzluftstrom kaum oder keine Flüssigkeit. Dies wird durch eine entsprechende Auslegung des Hauptwärmetauschers bewerkstelligt. Hierbei wird mehr Kälte als üblich auf den Rückführstrom übertragen, sodass dieser die gesamte Vorverflüssigung oder jedenfalls einen großen Teil davon übernimmt. Dies tut der Zurückhaltung von schwererflüchtigen Komponenten keinen Abbruch, weil der Rückführstrom ja bereits frei von solchen Komponenten ist.Also in the method according to the invention, the pre-liquefaction can not be avoided. Nevertheless, the feed air stream contains little or no liquid. This is accomplished by a corresponding design of the main heat exchanger ligt. In this case, more cold than usual transferred to the recycle stream, so that this takes over the entire Vorverflüssigung or at least a large part of it. This does not detract from the reluctance of less volatile components because the recycle stream is already free of such components.
Auf diese Weise kann der Spülstrom aus der Waschsäule bei der Erfindung sehr klein gehalten werden, beispielsweise weniger als 1 mol-% der Luftmenge, insbesondere weniger als 0,1 mol-%. Hierdurch kann der Aufwand bei zu dessen Aufbereitung entsprechend gering gehalten werden, oder der Spülstrom wird im einfachsten Fall verworfen.On this way, the purge stream from the wash column be kept very small in the invention, for example less as 1 mol% of the air amount, in particular less than 0.1 mol%. hereby the effort in its preparation can be correspondingly low be held, or the purge flow is the simplest Case discarded.
Vorzugsweise wird die gesamte Einsatzluft für das Destilliersäulen-System in die Waschsäule eingeleitet wird und bei der bei der Einleitung in die Waschsäule im Wesentlichen flüssigkeitsfrei ist. Dies wird am einfachsten realisiert, indem die gesamte Einsatzluft über den vorgenannten abgekühlten Einsatzluftstrom in die erste Trennsäule eingeleitet wird.Preferably is the total feed air for the distillation column system is introduced into the wash column and at the at the Introduction into the wash column essentially free of liquid is. This is most easily realized by putting all the feed air over the aforementioned cooled feed air stream in the first Separation column is initiated.
Der flüssige Spülstrom aus der Waschsäule kann verworfen werden. Damit werden die unerwünschten schwererflüchtigen Komponenten auf besonders kostengünstige Weise entsorgt.Of the liquid purge stream from the wash column can be discarded. This will be the unwanted volatile Components disposed of in a particularly cost-effective manner.
Es ist günstig, wenn die Waschsäule mit einem besonders geringen Rücklaufverhältnis von weniger als 0,001, insbesondere weniger als 0,0005 betrieben wird.It is favorable if the wash column with a particularly low reflux ratio of less than 0.001, especially less than 0.0005 is operated.
Die Waschsäule kann zum Beispiel ein bis zehn praktische beziehungsweise theoretische Böden aufweisen. Im Allgemeinen wird die Säule mit praktischen Böden ausgestattet; alternativ kann Sie mit geordneter Packung oder Füllkörpern bestückt sein, dann gilt die theoretische Bodenzahl.The Washing column can be for example one to ten practical respectively have theoretical floors. In general, the column becomes equipped with practical floors; alternatively you can with ordered packing or packing be equipped, then the theoretical number of plates applies.
In einer Ausgestaltung des erfindungsgemäßen Verfahrens weist das Destilliersäulen-System einen Forced-Flow-Verdampfer aufweist, der insbesondere als Kondensator-Verdampfer ausgebildet ist und flüssigen Rücklauf für die erste Trennsäule erzeugt. Beispielsweise kann die erste Trennsäule als Einzelsäule zur Stickstoff-Sauerstoff-Trennung ausgestaltet sein und den Forced-Flow-Verdampfer als einzigen Kondensator-Verdampfer aufweisen, insbesondere als Kopfkondensator.In an embodiment of the method according to the invention the distillation column system has a forced flow evaporator has, in particular, designed as a condenser-evaporator is and liquid reflux for the first Produced separation column. For example, the first separation column designed as a single column for nitrogen-oxygen separation his and the forced-flow evaporator as a single condenser-evaporator have, in particular as a head capacitor.
Vorzugsweise wird der Forced-Flow-Verdampfer mit einer Flüssigkeit betrieben, die aus dem unteren Bereich der ersten Trennsäule entnommen wird, beispielsweise mit der Sumpfflüssigkeit einer Einzelsäule.Preferably the forced-flow evaporator is operated with a liquid, which is taken from the lower part of the first separation column, for example, with the bottom liquid of a single column.
Die Vorteile des erfindungsgemäßen Verfahrens kommen besonders zum Tragen, wenn im Anschluss an die erste Trennsäule an einer Zwischenstelle der ersten Trennsäule ein sauerstoffhaltiger Strom entnommen und einer Reinsauerstoffsäule zugeleitet wird und aus dem unteren Bereich der Reinsauerstoffsäule ein Reinsauerstoff-Produktstrom entnommen wird.The Advantages of the method according to the invention come particularly useful when following the first separation column at an intermediate point of the first separation column, an oxygen-containing stream removed and fed to a pure oxygen column and from the lower region of the pure oxygen column Pure oxygen product stream is taken.
Vorzugsweise ist der Rückverdichter als Kaltverdichter ausgebildet.Preferably the recompressor is designed as a cold compressor.
Die
Erfindung betrifft außerdem eine Vorrichtung zur Tieftemperaturzerlegung
von Luft gemäß den Patentansprüchen
Die Erfindung sowie weitere Einzelheiten der Erfindung werden im Folgenden anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert.The Invention and further details of the invention are hereinafter based on an embodiment schematically shown in the drawing explained in more detail.
Atmosphärische
Luft
Das
Destilliersäulen-System umfasst in dem Ausführungsbeispiel
die Waschsäule
Die
Waschsäule
Die
im Einsatzluftstrom enthaltenen schwererflüchtigen Komponenten
werden in den Sumpf der Waschsäule
Vom
Kopf der Waschsäule wird ein Gasstrom
Der
Betriebsdruck der Einzelsäule
Als
Hauptprodukt der Einzelsäule
Die
erste Restfraktion
Die
zweite Restfraktion
Ein
sauerstoffhaltiger Strom
Der
Sumpfverdampfer
Vom
Sumpf der Reinsauerstoffsäule
Das
Kopfgas
Bei
Bedarf kann der Anlage stromaufwärts und/oder stromabwärts
der Pumpe
Der
Kopfkondensator
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES 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 The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 2261234 [0002] - DE 2261234 [0002]
- - US 4966002 [0002] US 4966002 [0002]
- - US 5363657 [0002] US 5363657 [0002]
- - US 5528906 [0002] US 5528906 [0002]
- - US 5934106 [0002] US 5934106 [0002]
- - US 5611218 [0002] US 5611218 [0002]
- - US 5582034 [0002] US 5582034 [0002]
- - US 2004244417 [0002] US 2004244417 [0002]
- - US 2007204652 A1 [0002] US 2007204652 A1 [0002]
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- - WO 00/08399 [0013] WO 00/08399 [0013]
Zitierte Nicht-PatentliteraturCited non-patent literature
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Claims (12)
Priority Applications (1)
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DE102008064117A DE102008064117A1 (en) | 2008-12-19 | 2008-12-19 | Air dissecting method for distilling column system, involves withdrawing liquid rinsing stream from lower area of wash column, where cooled auxiliary air flow is essentially liquid-free during introduction into wash column |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008064117A DE102008064117A1 (en) | 2008-12-19 | 2008-12-19 | Air dissecting method for distilling column system, involves withdrawing liquid rinsing stream from lower area of wash column, where cooled auxiliary air flow is essentially liquid-free during introduction into wash column |
Publications (1)
Publication Number | Publication Date |
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DE102008064117A1 true DE102008064117A1 (en) | 2009-05-28 |
Family
ID=40577351
Family Applications (1)
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DE102008064117A Withdrawn DE102008064117A1 (en) | 2008-12-19 | 2008-12-19 | Air dissecting method for distilling column system, involves withdrawing liquid rinsing stream from lower area of wash column, where cooled auxiliary air flow is essentially liquid-free during introduction into wash column |
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DE (1) | DE102008064117A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021104668A1 (en) * | 2019-11-26 | 2021-06-03 | Linde Gmbh | Process and plant for low-temperature fractionation of air |
CN114025892A (en) * | 2019-06-21 | 2022-02-08 | 艾奎诺能源公司 | Cleaning of gas compressors |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114025892A (en) * | 2019-06-21 | 2022-02-08 | 艾奎诺能源公司 | Cleaning of gas compressors |
CN114025892B (en) * | 2019-06-21 | 2023-11-17 | 艾奎诺能源公司 | Cleaning of gas compressors |
WO2021104668A1 (en) * | 2019-11-26 | 2021-06-03 | Linde Gmbh | Process and plant for low-temperature fractionation of air |
CN113924452A (en) * | 2019-11-26 | 2022-01-11 | 林德有限责任公司 | Method and apparatus for the cryogenic separation of air |
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