DE102007024168A1 - Method and apparatus for cryogenic air separation - Google Patents
Method and apparatus for cryogenic air separation Download PDFInfo
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- DE102007024168A1 DE102007024168A1 DE102007024168A DE102007024168A DE102007024168A1 DE 102007024168 A1 DE102007024168 A1 DE 102007024168A1 DE 102007024168 A DE102007024168 A DE 102007024168A DE 102007024168 A DE102007024168 A DE 102007024168A DE 102007024168 A1 DE102007024168 A1 DE 102007024168A1
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- single column
- pure oxygen
- residual fraction
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- heat exchanger
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000000926 separation method Methods 0.000 title claims abstract description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims 1
- 239000000047 product Substances 0.000 description 22
- 238000001704 evaporation Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 102000017795 Perilipin-1 Human genes 0.000 description 1
- 108010067162 Perilipin-1 Proteins 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- QJGQUHMNIGDVPM-OUBTZVSYSA-N nitrogen-15 Chemical compound [15N] QJGQUHMNIGDVPM-OUBTZVSYSA-N 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
- F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—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
- 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
- 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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- 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
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/42—Nitrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- 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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- 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
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/02—Recycle of a stream in general, e.g. a by-pass 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
- 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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/20—Boiler-condenser with multiple exchanger cores in parallel or with multiple re-boiling or condensing streams
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- 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
Das Verfahren und die Vorrichtung dienen zur Tieftemperatur-Luftzerlegung. Einsatzluft (8) wird in einem Hauptwärmetauscher (9) abgekühlt und in eine Einzelsäule (12) zur Stickstoffgewinnung eingeleitet (11, 43). Ein Stickstoff-Produktstrom (15, 16, 17) wird aus dem oberen Bereich der Einzelsäule (12) entnommen. Eine erste Restfraktion (18, 29) wird aus dem unteren oder mittleren Bereich der Einzelsäule (12) entnommen, rückverdichtet (30) und anschließend wieder der Einzelsäule (12) zugeleitet (32). Ein sauerstoffhaltiger Strom (36) wird der Einzelsäule (12) an einer Zwischenstelle entnommen und einer Reinsauerstoffsäule (38) zugeleitet (39). Ein Reinsauerstoff-Produktstrom (41) wird in flüssigem Zustand aus dem unteren Bereich der Reinsauerstoffsäule (38) entnommen. Der Reinsauerstoff-Produktstrom (41, 56) i wird n dem Hauptwärmetauscher (9) gegen Einsatzluft (8) verdampft und angewärmt und schließlich als gasförmiges Produkt (57) gewonnen.The method and apparatus are for cryogenic air separation. Feed air (8) is cooled in a main heat exchanger (9) and introduced into a single column (12) for the production of nitrogen (11, 43). A nitrogen product stream (15, 16, 17) is withdrawn from the top of the single column (12). A first residual fraction (18, 29) is taken from the lower or middle region of the single column (12), recompressed (30) and then fed back to the single column (12) (32). An oxygen-containing stream (36) is taken from the single column (12) at an intermediate point and fed to a pure oxygen column (38) (39). A pure oxygen product stream (41) is removed in the liquid state from the lower region of the pure oxygen column (38). The pure oxygen product stream (41, 56) i is vaporized and heated in the main heat exchanger (9) against feed air (8) and finally recovered as gaseous product (57).
Description
Die Erfindung betrifft ein Verfahren zur Tieftemperatur-Luftzerlegung gemäß dem Oberbegriff des Patentanspruchs 1.The The invention relates to a process for cryogenic air separation according to the preamble of claim 1.
Derartige
Verfahren, bei denen zusätzlich zu dem Stickstoffprodukt
eines Einzelsäulenverfahrens auch reiner Sauerstoff als
Produkt gewonnen werden kann, sind aus
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art und eine entsprechende Vorrichtung anzugeben, bei denen eine relativ große Menge an Reinsauerstoffprodukt erzeugt werden kann.Of the Invention is therefore the object of a method of the initially mentioned type and to provide a corresponding device in which produces a relatively large amount of pure oxygen product can be.
Diese Aufgabe wird dadurch gelöst, dass der Reinsauerstoff-Produktstrom in dem Hauptwärmetauscher gegen Einsatzluft verdampft und angewärmt und schließlich als gasförmiges Produkt gewonnen wird.These The object is achieved by the pure oxygen product stream evaporated in the main heat exchanger against feed air and warmed up and finally as gaseous Product is won.
Diese Verfahrensweise ist grundsätzlich bei Doppelsäulenverfahren als "Innenverdichtung" bekannt. Diese wird als Alternative zur gasförmigen Produktverdichtung (Außenverdichtung) angewendet, wenn das gasförmige Produkt unter Druck gewonnen werden soll.These Procedure is basically with double column method known as "internal compaction". This becomes an alternative to gaseous product compaction (External compression) applied when the gaseous Product should be obtained under pressure.
Die Zielrichtung der Erfindung ist jedoch eine andere: Die Produktverdampfung dient hier in erster Linie der Rückgewinnung der Verflüssigungskälte, die in dem flüssig abgezogenen Reinsauerstoff-Produktstrom enthalten ist. Es hat sich nämlich herausgestellt, dass der limitierende Faktor bei der Sauerstoffproduktmenge durch die Kälteleistung der Anlage gebildet wird. Bei der Erfindung wird die Verflüssigungskälte, die bei den bekannten Verfahren mit dem Sauerstoffprodukt abgeführt wird, in dem Hauptwärmetauscher auf die Einsatzluft beziehungsweise auf einen Teilstrom der Einsatzluft übertragen und bleibt somit dem Prozess (bis auf die üblichen Austauschverluste) erhalten.The However, the object of the invention is another: product evaporation Here primarily serves the recovery of the liquefaction cold, the in the liquid withdrawn pure oxygen product stream is included. It has turned out that the limiting factor in the amount of oxygen product due to the cooling capacity the plant is formed. In the invention, the liquefaction cold, which dissipated in the known methods with the oxygen product is, in the main heat exchanger on the feed air respectively transferred to a partial flow of the feed air and thus remains the process (except for the usual exchange losses).
Der "Hauptwärmetauscher" wird vorzugsweise durch einen einzigen Wärmetauscherblock gebildet. Bei größeren Anlagen kann es sinnvoll sein, den Hauptwärmetauscher durch mehrere hinsichtlich des Temperaturverlaufs parallel geschaltete Stränge zu realisieren, die durch voneinander getrennte Bauelemente gebildet werden. Grundsätzlich ist es möglich, dass der Hauptwärmetauscher beziehungsweise jeder dieser Stränge durch zwei oder mehr seriell verbundene Blöcke gebildet wird.Of the "Main heat exchanger" is preferably a single Heat exchanger block formed. For larger ones Systems, it may be useful to the main heat exchanger through several in parallel with respect to the temperature profile To realize strands separated by separate Components are formed. Basically, it is possible that the main heat exchanger or each of these strands formed by two or more serially connected blocks becomes.
Der Begriff "Verdampfen" schließt hier eine Pseudo-Verdampfung unter überkritischem Druck ein. Der Druck, unter dem der Reinsauerstoff-Produktstrom in den Hauptwärmetauscher eingeleitet wird, kann also auch über dem kritischen Druck liegen, ebenso wie der Druck des Wärmeträgers, der gegen den Reinsauerstoff-Produktstrom (pseudo-)kondensiert wird.Of the The term "evaporation" here concludes a pseudo-evaporation under supercritical pressure. The pressure under which the Pure oxygen product stream is introduced into the main heat exchanger, So can also be above the critical pressure, as well like the pressure of the heat carrier, which is against the Pure oxygen product stream (pseudo) is condensed.
Wenn der Sauerstoff vor Ort unter einem erhöhten Druck benötigt wird, der oberhalb des Betriebsdrucks der Reinsauerstoffsäule liegt, ist es günstig, wenn der Reinsauerstoff-Produktstrom in flüssigem Zustand auf einen erhöhten Druck gebracht wird. Dadurch kann im Rahmen der Erfindung ein warmer Sauerstoffverdichter entfallen oder zumindest relativ klein ausgeführt sein.If the oxygen needed locally under increased pressure which is above the operating pressure of the pure oxygen column it is convenient if the pure oxygen product stream in the liquid state to an elevated pressure is brought. As a result, within the scope of the invention, a warm oxygen compressor omitted or at least be made relatively small.
Es ist ferner günstig, wenn die Rückverdichtung der ersten Restfraktion mittels eines Kaltverdichters vorgenommen wird. Unter "Kaltverdichter" wird hier ein Verdichter verstanden, der bei einer Eintrittstemperatur von weniger als 200 K, vorzugsweise weniger als 150 K, insbesondere zwischen 90 und 120 K betrieben wird.It is also favorable if the recompression of first residual fraction is made by means of a cold compressor. By "cold compressor" is meant here a compressor, the at an inlet temperature of less than 200 K, preferably less than 150 K, in particular between 90 and 120 K is operated.
In einer weiteren Ausgestaltung der Erfindung wird eine zweite Restfraktion aus dem unteren Bereich der Einzelsäule entnommen und in einer Entspannungsmaschine arbeitsleistend entspannt, wobei die bei der arbeitsleistenden Entspannung erzeugte mechanische Energie mindestens teilweise zur Rückverdichtung der ersten Restfraktion genutzt wird. Die Übertragung der mechanischen Energie auf den Rückverdichter erfolgt unmittelbar mechanisch, beispielsweise über eine gemeinsame Welle von Entspannungsmaschine und Rückverdichter. Insbesondere dann, wenn der Rückverdichter als Kaltverdichter ausgebildet ist, wird vorzugsweise nur ein Teil der von der Entspannungsmaschine erzeugten mechanischen Energie auf den Rückverdichter übertragen; der Rest geht an eine warme Bremseinrichtung, z. B. ein Bremsgebläse, ein Generator oder eine dissipative Bremse.In Another embodiment of the invention is a second residual fraction taken from the lower part of the single column and in a relaxation machine work performing relaxed, the Mechanical energy generated during work-relaxing relaxation at least partially for recompression of the first residual fraction is being used. The transmission of mechanical energy on the recompressor is done directly mechanically, for example via a common wave of relaxation machine and recompressor. In particular, when the recompressor as a cold compressor is formed, is preferably only a part of the relaxation machine transmitted mechanical energy transferred to the recompressor; of the Rest goes to a warm braking device, z. B. a brake fan, a generator or a dissipative brake.
In einer weiteren Ausgestaltung der Erfindung weist die Einzelsäule einen Kopfkondensator auf, in dem Dampf aus dem oberen Bereich der Einzelsäule mindestens teilweise kondensiert wird, wobei in dem Kopfkondensator die erste Restfraktion vor ihrer Rückverdichtung und/oder die zweite Restfraktion vor ihrer arbeitsleistenden Entspannung mindestens teilweise verdampft werden.In a further embodiment of the invention, the single column has a top condenser, in which steam from the upper region of the single column is at least partially condensed, wherein in the top condenser, the first residual fraction prior to their recompression and / or the second residual fraction prior to their work-performing expansion min at least partially evaporated.
Mindestens ein Teil des in dem Kopfkondensator gewonnenen Kondensats wird als Rücklauf auf die Einzelsäule aufgegeben. Falls die beiden Restfraktionen dieselbe Zusammensetzung aufweisen, können sie gemeinsam durch den Kopfkondensator geführt werden. Vorzugsweise werden sie jedoch in getrennten Passagen des Kopfkondensators, insbesondere wenn sie unterschiedliche Zusammensetzung aufweisen.At least a part of the condensate recovered in the top condenser is called Return to the single column abandoned. If the two residual fractions may have the same composition they are passed together through the top condenser. Preferably, however, they are in separate passages of the top condenser, especially if they have different composition.
Es ist günstig, wenn die zweite Restfraktion am Sumpf der Einzelsäule abgezogen wird.It is favorable if the second residual fraction at the bottom of the Single column is deducted.
Die
erste Restfraktion kann grundsätzlich gemeinsam mit der
zweiten aus der Einzelsäule abgezogen werden, zum Beispiel
am Sumpf (siehe
Außerdem betrifft die Erfindung eine Vorrichtung zur Tieftemperatur-Luftzerlegung gemäß Patentanspruch 8.Furthermore The invention relates to a device for cryogenic air separation according to claim 8.
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
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
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
- - EP 807792 B1 [0002] - EP 807792 B1 [0002]
- - EP 412793 B2 [0015] - EP 412793 B2 [0015]
Claims (10)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007024168A DE102007024168A1 (en) | 2007-05-24 | 2007-05-24 | Method and apparatus for cryogenic air separation |
EP08008679A EP1995537A3 (en) | 2007-05-24 | 2008-05-08 | Process and device for the cryogenic separation of air |
TW097118441A TW200912229A (en) | 2007-05-24 | 2008-05-20 | Process and apparatus for low-temperature air fractionation |
US12/126,114 US20080289362A1 (en) | 2007-05-24 | 2008-05-23 | Process and apparatus for low-temperature air fractionation |
KR1020080048582A KR20080103474A (en) | 2007-05-24 | 2008-05-26 | Process and apparatus for low-temperature air fractionation |
CNA2008101078671A CN101311653A (en) | 2007-05-24 | 2008-05-26 | Process and device for the cryogenic separation of air |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007024168A DE102007024168A1 (en) | 2007-05-24 | 2007-05-24 | Method and apparatus for cryogenic air separation |
Publications (1)
Publication Number | Publication Date |
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DE102007024168A1 true DE102007024168A1 (en) | 2008-11-27 |
Family
ID=39734126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102007024168A Withdrawn DE102007024168A1 (en) | 2007-05-24 | 2007-05-24 | Method and apparatus for cryogenic air separation |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080289362A1 (en) |
EP (1) | EP1995537A3 (en) |
KR (1) | KR20080103474A (en) |
CN (1) | CN101311653A (en) |
DE (1) | DE102007024168A1 (en) |
TW (1) | TW200912229A (en) |
Cited By (1)
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---|---|---|---|---|
EP2053331A1 (en) | 2007-10-25 | 2009-04-29 | Linde Aktiengesellschaft | Method and device for low-temperature air separation |
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EP2236964B1 (en) * | 2009-03-24 | 2019-11-20 | Linde AG | Method and device for low-temperature air separation |
DE102010060595A1 (en) | 2010-11-16 | 2012-05-16 | Stefan Buchner | Method for generating electricity from liquefied gases, used in e.g. power plant, involves vaporizing stored liquefied gas |
CN102322726A (en) * | 2011-06-13 | 2012-01-18 | 开封空分集团有限公司 | Air separating device and method for alternatively producing nitrogen gas and liquid nitrogen |
CN102320581A (en) * | 2011-08-30 | 2012-01-18 | 开封黄河空分集团有限公司 | A kind of nitrogen reparation technology |
EP2989400B1 (en) | 2013-04-25 | 2021-12-29 | Linde GmbH | Method for obtaining an air product in an air separating system with temporary storage, and air separating system |
CN105556228B (en) | 2013-07-09 | 2018-02-09 | 林德股份公司 | The method and apparatus for producing the method and apparatus and low temperature air separating of compressed air stream |
WO2020083525A1 (en) | 2018-10-23 | 2020-04-30 | Linde Aktiengesellschaft | Method and unit for low-temperature air separation |
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 |
CN117157498A (en) * | 2021-04-09 | 2023-12-01 | 林德有限责任公司 | Method and apparatus for cryogenic separation of air |
CN114413571A (en) * | 2022-01-24 | 2022-04-29 | 四川空分集团工程有限公司 | Low energy consumption low pressure oxygen air separation plant |
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EP0412793B2 (en) | 1989-08-11 | 2001-07-11 | The Boc Group, Inc. | Process and apparatus for producing nitrogen from air |
EP0807792B1 (en) | 1996-05-14 | 2001-12-19 | The Boc Group, Inc. | Air separation method and apparatus |
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DE19609490A1 (en) * | 1995-03-10 | 1996-09-12 | Linde Ag | Oxygen-production process with reduced energy requirement |
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DE10013075A1 (en) * | 2000-03-17 | 2001-09-20 | Linde Ag | Process for recovering gaseous nitrogen by the decomposition of air in a distillation column system comprises removing a part of the nitrogen-rich liquid from the condenser-vaporizer as a liquid product |
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2007
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-
2008
- 2008-05-08 EP EP08008679A patent/EP1995537A3/en not_active Withdrawn
- 2008-05-20 TW TW097118441A patent/TW200912229A/en unknown
- 2008-05-23 US US12/126,114 patent/US20080289362A1/en not_active Abandoned
- 2008-05-26 CN CNA2008101078671A patent/CN101311653A/en active Pending
- 2008-05-26 KR KR1020080048582A patent/KR20080103474A/en not_active Application Discontinuation
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EP0412793B2 (en) | 1989-08-11 | 2001-07-11 | The Boc Group, Inc. | Process and apparatus for producing nitrogen from air |
EP0807792B1 (en) | 1996-05-14 | 2001-12-19 | The Boc Group, Inc. | Air separation method and apparatus |
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EP2053331A1 (en) | 2007-10-25 | 2009-04-29 | Linde Aktiengesellschaft | Method and device for low-temperature air separation |
DE102007051184A1 (en) | 2007-10-25 | 2009-04-30 | Linde Aktiengesellschaft | Method and apparatus for cryogenic air separation |
Also Published As
Publication number | Publication date |
---|---|
CN101311653A (en) | 2008-11-26 |
US20080289362A1 (en) | 2008-11-27 |
KR20080103474A (en) | 2008-11-27 |
EP1995537A2 (en) | 2008-11-26 |
EP1995537A3 (en) | 2009-04-15 |
TW200912229A (en) | 2009-03-16 |
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