EP1666822A1 - Apparatus for the cryogenic separation of a gaseous mixture in particular of air - Google Patents

Apparatus for the cryogenic separation of a gaseous mixture in particular of air Download PDF

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Publication number
EP1666822A1
EP1666822A1 EP20040028681 EP04028681A EP1666822A1 EP 1666822 A1 EP1666822 A1 EP 1666822A1 EP 20040028681 EP20040028681 EP 20040028681 EP 04028681 A EP04028681 A EP 04028681A EP 1666822 A1 EP1666822 A1 EP 1666822A1
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EP
European Patent Office
Prior art keywords
cooler
direct contact
low
feed mixture
heat exchanger
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
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EP20040028681
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German (de)
French (fr)
Inventor
Andreas Brox
Markus Huppenberger
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Linde AG
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Linde AG
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Priority to EP04028682 priority Critical
Priority to EP20040028681 priority patent/EP1666822A1/en
Priority to EP20040028683 priority patent/EP1666823A1/en
Publication of EP1666822A1 publication Critical patent/EP1666822A1/en
Application status is Withdrawn legal-status Critical

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04763Start-up or control of the process; Details of the apparatus used
    • F25J3/04866Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/0489Modularity and arrangement of parts of the air fractionation unit, in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04151Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04157Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04151Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04763Start-up or control of the process; Details of the apparatus used
    • F25J3/04866Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04951Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00Processes or apparatus using other separation and/or other processing means
    • F25J2205/30Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/32Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00Processes or apparatus using other separation and/or other processing means
    • F25J2205/30Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/34Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/12Particular process parameters like pressure, temperature, ratios
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/32Details on header or distribution passages of heat exchangers, e.g. of reboiler-condenser or plate heat exchangers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00Refrigeration
    • Y10S62/902Apparatus
    • Y10S62/903Heat exchange structure

Abstract

Device (A) for generating a product (B) by cryogenic resolution of a gas mixture (C), especially air. Device (A) for generating a product (B) by cryogenic resolution of a gas mixture (C), especially air, comprises: (A) a compressor (2) for (C); (B) a direct-contact cooler for precooling (C); (C) a purification unit for precooled (C); (D) a cryogenic part (7), including a main heat exchanger (8a) for cooling purified (C) to about its dew point and a distillation column (9a) for cryogenic fractionation of cooled (C); and (E) a coolant recycle line (61) to supply coolant to (3), where (61) includes an evaporative cooler (15) that cools coolant in direct heat exchange with a gas stream from (7). The new feature is that the ratio (R) of (a) the distance (d1) between (15) and (3) and (b) the distance (d2) between (15) and (8a) is at least 0.5, especially at least 1.

Description

  • Die Erfindung betrifft eine zur Erzeugung eines Produkts durch Tieftemperaturzerlegung eines Gasgemischs, insbesondere von Luft, mit einem Einsatzgasverdichter zur Verdichtung des Einsatzgemischs, mit einem Direktkontaktkühler zur Vorkühlung des Einsatzgemischs, mit einer Reinigungsvorrichtung zur Reinigung des vorgekühlten Einsatzgemischs, mit einem Tieftemperaturteil, der einen Hauptwärmetauscher zur Abkühlung des gereinigten Einsatzgemischs auf etwa Taupunktstemperatur und eine Destilliersäule zur Tieftemperaturzerlegung des abgekühlten Einsatzgemischs aufweist, und mit einem Kühlmittelkreislauf zur Lieferung von Kühlmittel für den Direktkontaktkühler, wobei der Kühlmittelkreislauf einen Verdunstungskühler zur Abkühlung von Kühlmittel im direkten Wärmeaustausch mit einem Gasstrom aus dem Tieftemperaturteil aufweist. The invention relates to a to produce a product by low-temperature fractionation of a gas mixture, in particular air, with a feed gas compressor for compression of the feed mixture with a direct contact cooler for precooling the feed mixture, with a cleaning device for cleaning the pre-cooled feed mixture, with a low temperature part of the main heat exchanger one to comprises cooling the purified feed mixture to about dew point and a distillation column for low-temperature fractionation of the cooled feed mixture, and with a coolant circuit for the supply of coolant for the direct contact cooler, wherein the coolant circuit comprises an evaporative cooler for cooling the coolant in direct heat exchange with a gas stream from the low-temperature part.
  • Vorrichtungen zur Tieftemperaturzerlegung atmosphärischer Luft oder anderer Gasgemische sind zum Beispiel aus Hausen/Linde, Tieftemperaturtechnik, 2. Auflage 1985 bekannt. Devices for low-temperature fractionation of atmospheric air or other gas mixtures are known for example from Hausen / Linde, cryogenics, 2nd edition 1985th
  • Unter "Tieftemperatur" wird hier grundsätzlich jede Temperatur verstanden, die unterhalb der Umgebungstemperatur liegt, vorzugsweise jedoch eine Temperatur von 200 K oder weniger, höchst vorzugsweise von 150 K oder weniger, beispielsweise von 100 K oder weniger. By "low temperature" means any temperature here is generally understood that lies below the ambient temperature, but preferably a temperature of 200 K or less, most preferably of 150 K or less, for example 100 K or less.
  • In einem "Direktkontaktkühler" (direct contact cooler) wird das Einsatzgemisch in direkten Wärmeaustausch mit einem Kühlmittel, zum Beispiel Wasser, gebracht und dadurch abgekühlt. In a "direct contact cooler" (direct contact cooler) the feed mixture is in direct heat exchange, brought into contact with a coolant, for example water and cooled thereby. Er dient insbesondere zum Abführen von Verdichtungswärme, die in einem in der Regel vorgeschalteten Einsatzgasverdichter entstanden ist. He serves in particular for removing heat of compression that has arisen in an upstream usually feed gas compressor.
  • Eine nachfolgende "Reinigungseinrichtung" ist in der Regel als Adsorptionsvorrichtung ausgebildet und weist insbesondere mindestens zwei umschaltbare Behälter aus, die zyklisch betrieben werden. A subsequent "cleaning device" is designed as adsorption generally and in particular has at least two switchable containers, which are operated cyclically. Sie dient der Abtrennung unerwünschter Komponenten, beispielsweise solcher, die im Tieftemperaturteil ausfrieren können. It is used to separate unwanted components, such as those which can freeze in the low temperature part.
  • Im "Tieftemperaturteil" wird das Einsatzgemisch zunächst auf etwa Taupunktstemperatur abgekühlt und anschließend in einem Destilliersäulensystem zerlegt. In the "low-temperature section" the feed mixture is first cooled to about dew point and then broken down into a distillation column system. Der Tieftemperaturteil enthält also einen oder mehrere Wärmetauscher und eine oder mehrere Destilliersäulen. Thus, the low-temperature section includes one or more heat exchangers and one or more distillation columns. Aus dem Tieftemperaturteil wird das Produkt in Gas- oder Flüssigform abgezogen. From the low-temperature section the product is withdrawn in gas or liquid form. Selbstverständlich können auch mehrere Produkte in gleichem oder unterschiedlichem Aggregatzustand sowie in gleicher oder verschiedener chemischer Zusammensetzung erzeugt werden. Of course, several products in the same or different aggregate state, and in the same or different chemical composition can be produced. Um Verluste durch einströmende Umgebungswärme zu verhindern, ist der Tieftemperaturteil üblicherweise wärmeisoliert, indem er von einer oder mehreren Coldboxen umschlossen wird. To prevent losses due to flowing ambient heat, the low-temperature section is usually thermally insulated by being surrounded by one or more cold boxes.
  • Der "Hauptwärmetauscher" dient zur Anwärmung des oder der gasförmigen Produkts/Produkte in indirektem Wärmeaustausch mit mindestens einem Einsatzgemischstrom. The "main heat exchanger" is used for heating of the gaseous or product / products in indirect heat exchange with at least one feed mixture stream.
  • Direktkontaktkühler werden häufig mit Kühlmittelkreisläufen betrieben, bei denen mindestens ein Teil des aus dem Direktkontaktkühler abgezogenen, erwärmten Kühlmittels abgekühlt und zum Direktkontaktkühler zurückgeführt wird. Direct contact cooler are often operated with coolant circuits, in which cooling at least a portion of the withdrawn from the direct contact cooler, warmed refrigerant and returned to the direct contact cooler.
  • Zur Abkühlung des Kühlmittels ist es üblich, einen oder mehrere Verdunstungskühler einzusetzen. To cool the coolant, it is common to use one or more evaporative cooler. In einem "Verdunstungskühler" wird trockenes Gas in direkten Gegenstrom mit Kühlmittel gebracht. In an "evaporative cooler" dry gas is brought into direct countercurrent with coolant. Das Kühlmittel verdunstet dabei teilweise und wird dabei abgekühlt. The refrigerant evaporates thereby partially and is cooled there. Das trockene Gas steht bei Tieftemperaturanlagen häufig als Restprodukt zur Verfügung, beispielsweise als unreiner Reststickstoff in einer Luftzerlegungsanlage. The dry gas is often referred to as residual product available, for example as impure residual nitrogen in an air separation plant in cryogenic systems.
  • Üblicherweise werden Direktkontaktkühler und Verdunstungskühler wegen ihrer funktionellen Beziehung als eine Einheit oder zumindest als unmittelbar benachbarte Einheiten angeordnet. Typically, direct contact cooler and evaporative cooler are arranged because of their functional relationship as one unit or at least immediately adjacent units.
  • Der Erfindung liegt die Aufgabe zugrunde, die Anordnung der Komponenten einer Tieftemperaturzerlegungsanlage weiter zu optimieren, um eine besonders hohe Wirtschaftlichkeit der Anlage zu erreichen. The invention has the objective to optimize the arrangement of the components of a cryogenic separation plant further to achieve a particularly high efficiency of the system.
  • Diese Aufgabe wird dadurch gelöst, dass das Verhältnis des Abstandes zwischen Verdunstungskühler und Direktkontaktkühler zu dem Abstand zwischen Verdunstungskühler und Hauptwärmetauscher mindestens 0,5 , insbesondere mindestens 1,0 beträgt. This object is achieved in that the ratio of the distance between the evaporative cooler and direct contact cooler to the distance between the evaporative cooler and main heat exchanger at least 0.5, especially at least 1.0.
  • Gemäß der Erfindung ist der Verdunstungskühler 15 vergleichsweise nahe dem Hauptwärmetauscher angeordnet. According to the invention, the evaporative cooler 15 is located relatively close to the main heat exchanger. Dies bedeutet zwar höheren Aufwand für die Kühlmittelverrohrung; While this means higher costs for the coolant piping; allerdings kann die Leitung für den Gasstrom aus dem Tieftemperaturteil besonders kurz ausgeführt werden. However, the line for the gas stream from the low-temperature section can be designed to be particularly short. Im Rahmen der Erfindung hat sich herausgestellt, dass diese Anordnung zu insgesamt vergleichsweise niedrigen Investitionskosten kosten führt. In the present invention it has been found that this arrangement results in cost to a total of comparatively low investment costs. Es wird insbesondere der Aufwand für die Rohrleitungen und den dazugehörigen Stahlbau-Kosten verringert. It is reduced in particular the cost of pipelines and related steel construction costs. Dies ist teilweise auf den sehr hohen Querschnitt (beispielsweise 1 bis 2 m) der Gasleitung zum Verdunstungskühler zurückzuführen. This is partly due to the very high cross-section (for example 1 to 2 m) of the gas line due to the evaporative cooler.
  • Die abhängigen Patentansprüche enthalten weitere vorteilhafte Ausgestaltungen der erfindungsgemäßen Vorrichtung. The dependent claims contain further advantageous embodiments of the inventive device.
  • Die Erfindung sowie weitere Einzelheiten der Erfindung werden im Folgenden anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels für eine erfindungsgemäße Vorrichtung näher erläutert, die als Tieftemperatur-Luftzerlegungsanlage ausgebildet ist. The invention and further details of the invention will be explained in more detail below reference to a schematically depicted in the drawings embodiment of an inventive device which is designed as a cryogenic air separation plant.
  • Atmosphärische Luft wird als "Einsatzgemisch" über ein Einlassfilter 1 angesaugt und über Einsatz-Rohrleitungen 51, 52, 53, 54 zu weiteren Anlagenkomponenten geführt. Atmospheric air is drawn in as a "feed mixture" via an inlet filter 1 and passed through use of pipes 51, 52, 53, 54 to the other system components. Zunächst wird die gefilterte Luft 51 in einem Hauptluftverdichter, der in dem Beispiel den "Einsatzgasverdichter" darstellt, komprimiert. First, the filtered air 51 is compressed in a main air compressor, which is in the example the "feed gas compressor". Die verdichtete Luft 52 strömt in einen Direktkontaktkühler 3 und wird dort in direktem Wärmeaustausch mit Kühlwasser, das über eine Kühlwasser-Verrohrung 61 heranströmt, abgekühlt. The compressed air 52 flows in a direct contact cooler 3, where it is cooled in direct heat exchange with cooling water, the zoom flows through a cooling water piping 61st Die abgekühlte Luft 53 wird weiter in eine Reinigungseinrichtung 4 geleitet, die ein Paar von Molekularsieb-Adsorbern 5, 6 aufweist. The cooled air 53 is passed into a cleaning device 4, which comprises a pair of molecular sieve adsorbers 5. 6 Die gereinigte Luft 54 strömt weiter zum Tieftemperaturteil 7. The purified air 54 continues to flow to the low temperature part. 7
  • Der Tieftemperaturteil kann aus einer einzigen Coldbox bestehen, in der alle kryogenen Apparate angeordnet sind, insbesondere der oder die Wärmetauscher und die Destilliersäule(n), oder auch aus einer Vielzahl separater Coldboxen. The low-temperature section may be composed of a single cold box in which all cryogenic apparatus are arranged, in particular, or the heat exchanger and the distillation column (s), or even a plurality of separate cold boxes. In dem Beispiel sind zwei separate Coldboxen vorgesehen. In the example, two separate cold boxes are provided. Eine zylinderförmige Rektifikationsbox 9 enthält die Destilliersäulen 9a, hier eine Doppelsäule mit Hochdruck- und Niederdrucksäule und einem dazwischen angeordneten Hauptkondensator. A cylindrical Rektifikationsbox 9 contains the distillation column 9a, here a double column with high pressure and low pressure column and an interposed main capacitor. Die übrigen kalten Teile, insbesondere der Hauptwärmetauscher 8a sind in einer quaderförmigen Wärmetauscher-Box 8 untergebracht. The other cold parts, in particular the main heat exchanger 8a are housed in a parallelepiped-shaped heat exchanger box. 8 Die beiden Coldboxen 8, 9 isolieren die jeweiligen kalten Apparateteile gegen Wärmeeinfall aus der Umgebung. The two cold boxes 8, 9 isolate the respective cold apparatus parts against incidence of heat from the environment. Ein Übergangsabschnitt 10 gehört ebenfalls zum Tieftemperaturteil. A transition section 10 also belongs to the low-temperature section. Er wird ebenfalls von einer Coldbox umschlossen; He is also surrounded by a cold box; alternativ werden die im Übergangsabschnitt 10 befindlichen Rohrleitungen und Armaturen mittels einer entsprechend kleineren Coldbox wärmeisoliert. alternatively, the piping and valves located in the transition section 10 are thermally insulated by means of a correspondingly smaller cold box.
  • Der Hauptwärmetauscher ist als ausschließlich rekuperativer Wärmetauscher ausgebildet, also nicht als umschaltbarer Wärmetauscher (Revex). The main heat exchanger is designed as a solely recuperative heat exchanger, so as not switchable heat exchanger (Revex). Er besteht zum Beispiel aus einem Block oder einer Mehrzahl von strömungstechnisch miteinander verbundenen Blöcken. It consists for example of a block or a plurality of fluidly interconnected blocks. Der oder die Blöcke sind vorzugsweise als Aluminium-Plattenwärmetauscher ausgebildet. The one or more blocks are preferably formed as aluminum plate heat exchanger. Mögliche weitere Wärmetauscher wie zum Beispiel ein oder mehrere Unterkühlungs-Gegenströmer können ebenfalls in der Wärmetauscher-Box untergebracht sein; Possible further heat exchanger to be as one or more subcooling countercurrent can also housed for example in the heat exchanger box; alternativ oder zusätzlich können ein oder mehrere Blöcke von Unterkühlungs-Gegenströmern in der Rektifikationsbox angeordnet sein. Alternatively or additionally, one or more blocks of supercooling in the Gegenströmern Rektifikationsbox may be disposed. Die Form der Rektifikationsbox kann vom Ausführungsbeispiel abweichen; The shape of the Rektifikationsbox can differ from the embodiment; sie kann zum Beispiel im Wesentlichen quaderförmig ausgebildet sein. they may for example be formed in a substantially cuboid.
  • Der Hauptluftverdichter 2 wird über eine erste Welle 11 von einem Antriebsmittel 12 angetrieben, das als Elektromotor, Gas- oder Dampfturbine ausgebildet ist. The main air compressor 2 is driven by a first shaft 11 by a drive means 12 which is designed as an electric motor, gas or steam turbine. Außerdem ist in dem Beispiel ein Nachverdichter 14 für einen Teil der gereinigten Luft 54 vorgesehen. In addition, in the example, a secondary compressor 14 is provided for a portion of the purified air 54th Über eine in der Zeichnung lediglich angedeutete Booster-Luft-Verrohrung 62 ist der Einlass des Nachverdichters 14 mit der Rohrleitung 54 für die gereinigte Luft verbunden. A merely indicated in the drawing booster air piping 62 of the inlet the booster 14 to the pipe 54 is connected to the purified air. Die im Nachverdichter 14 weiterverdichtete Luft wird über eine weitere, in der Zeichnung nicht dargestellte Rohrleitung in den Tieftemperaturteil 7 geleitet, insbesondere in die Wärmetauscher-Box 8. In dem Beispiel wird der Nachverdichter 14 über eine weitere Welle 13 ebenfalls von dem Antriebsmittel 12 angetrieben. The further compressed in the secondary compressor 14 air is guided via a further, not shown in the drawing pipe in the low-temperature part 7, in particular in the heat exchanger box 8. In the example of the secondary compressor 14 is also driven by a further shaft 13 of the drive means 12th Alternativ könnte der Nachverdichter unabhängig vom Hauptluftverdichter angetrieben werden, beispielsweise durch eine separate Gas- oder Dampfturbine oder durch einen separaten Elektromotor. Alternatively, the secondary compressor could be driven independently of the main air compressor, for example by a separate gas or steam turbine or by a separate electric motor.
  • Die Produkte des Tieftemperaturteils 7 werden über beispielhaft eingezeichnete Produktleitungen 105, 106 abgegeben, die hier in Sammelleitungen 107 beziehungsweise 108 münden. The products of the low temperature part 7 are discharged through an example drawn product lines 105, 106 which open here in manifolds 107 and 108th Die Sammelleitungen 107, 108 sind auf einer Rohrbrücke 109 angeordnet und können die Vorrichtung und mögliche weitere identische oder ähnliche Vorrichtungen (Stränge) zu einer mehrsträngigen Anlage verbinden beziehungsweise zu einem Tanklager und/oder zu einer Notversorgungsvorrichtung führen. The manifolds 107, 108 are arranged on a pipe rack 109, and can connect to a multi-strand installation or lead to a storage tank and / or to a Notversorgungsvorrichtung the device and possible further identical or similar devices (strands).
  • Zur Abkühlung von Wasser vor dessen Einleitung in den Direktkontaktkühler 3 dient ein Verdunstungskühler 15. Darin wird trockener Reststickstoff aus dem Tieftemperaturteil in direkten Wärme- und Stoffaustausch mit abzukühlendem Kühlwasser gebracht. an evaporative cooler is used for cooling water prior to its introduction into the direct contact cooler 3 15. Therein dry residual nitrogen from the low-temperature part in direct heat and mass transfer associated with abzukühlendem cooling water. Über die Kühlwasser-Verrohrung 61 wird kaltes Kühlwasser zum Direktkontaktkühler geleitet. About the cooling water piping 61 cold cooling water is directed to the direct contact cooler. Warmes Kühlwasser wird direkt oder indirekt zum Verdunstungskühler zurückgeführt. Warm cooling water is returned directly or indirectly to the evaporative cooler. Der feuchte Stickstoff aus dem Verdunstungskühler enfinreicht in die Atmosphäre. The wet nitrogen from the evaporative cooler enfinreicht into the atmosphere.
  • Die Vorrichtung weist außerdem eine Betriebsmittel-Verrohrung (utility piping) 63 auf, deren Lage in der Zeichnung schematisch angedeutet ist. The apparatus also includes a resource casing (utility piping) 63, the position of which is indicated schematically in the drawing. Die Betriebsmittel-Verrohrung dient zum Transport von Dampf, Gas und/oder Kühlwasser und zum Entsorgen von Kondensat, Kühlwasser etc. Sie mündet in Betriebsmittel-Sammelleitungen (nicht eingezeichnet), die auf der Rohrbrücke 109 angeordnet sein können. The resource piping is used to transport vapor, gas and / or cooling water and for disposing of condensate, cooling water, etc. It opens into resource manifolds (not shown), which may be arranged on the pipe bridge 109th Betriebsmittel- und Booster-Luft-Verrohrung 63, 62 können auf dem Boden (auf Sleepern) oder auf einer oder mehreren Rohrbrücken angeordnet sein. Resource and booster air piping 63, 62 can be arranged on the floor (on Sleepern) or on one or more pipe racks.
  • Die Grundflächen des Direktkontaktkühlers 3, der Reinigungseinrichtung 4 und des Tieftemperaturteils 7 weisen in dem Ausführungsbeispiel Kreisform, Rechteckform beziehungsweise eine komplexe Form auf. The base areas of the direct contact cooler 3, the cleaning device 4 and the low temperature part 7 have in the embodiment, circular shape, rectangular shape or a complex shape. Diese Grundflächen sind auf einer Linie, zum Beispiel auf einer Hauptorientierungsachse 101 angeordnet. These bases are arranged on a line, for example, on a main orientation axis of the one hundred and first Zusätzlich verläuft diese Linie 101 auch durch die Grundfläche des Hauptluftverdichters 2. Hierdurch ergibt sich eine besonders kurze Eirisatzgasverrohrung 52/53/54. In addition, this line is 101 by the base of the main air compressor 2. This results in a particularly short Eirisatzgasverrohrung 52/53/54. Auch die Produktleitungen 105, 106, die gegenüber dem Eintritt der Einsatzleitung 54 angeordnet sind, weisen eine besonders geringe Länge auf. Also, the product lines 105, 106 which are disposed opposite the inlet of the feed conduit 54, have a particularly small length. Sie können sogar so kurz sein, dass eine eigene Rohrbrücke nicht benötigt wird. You can even be so short that a separate pipe bridge is not needed.
  • Das Rechteck 102, das die Grundflächen von Direktkontaktkühler 3, Reinigungseinrichtung 4 und Tieftemperaturteil 7 umschließt, ist in der Ausdehnung, die in der Zeichnung vertikal verläuft, etwa um den Faktor 1,7 länger als in der dazu senkrechten Richtung (horizontal in der Zeichnung). The rectangle 102 that surrounds the base areas of direct contact cooler 3, cleaning means 4 and low-temperature section 7, is longer than in the perpendicular direction in the extension which runs vertically in the drawing, about a factor of 1.7 (horizontally in the drawing) , Für das Rechteck 103, das auch die Grundfläche des Hauptluftverdichters und der mit ihm verbundenen Apparate umschließt, gilt ein Faktor von etwa 1,8. For the rectangle 103 that surrounds the base of the main air compressor and its related equipment, a factor of about 1.8 applies. Hierdurch reichen eine kurze Rohrbrücke 109 und Sammelleitungen 107, 108 geringer Länge für die Produktabfuhr bzw. die Betriebsmittel-Zu- und Abfuhr aus; In this way, a sufficient short bridging pipe 109 and manifolds 107, 108 of short length for the product removal or the resource supply and discharge; dies ist insbesondere bei mehrsträngigen Anlagen von Vorteil. This is especially important for multi-strand systems an advantage. (Die Zeichnung ist wegen ihres schematischen Charakters auch in dieser Hinsicht nicht unbedingt maßstäblich.) (The drawing is not necessarily to scale because of their schematic character in this respect.)
  • Üblicherweise werden Direktkontaktkühler 3 und Verdunstungskühler 15 wegen ihrer funktionellen Beziehung als eine Einheit oder zumindest als unmittelbar benachbarte Einheiten angeordnet. Typically, direct contact cooler 3 and evaporative cooler 15 are placed because of their functional relationship as one unit or at least immediately adjacent units. In dem Ausführungsbeispiel ist der Verdunstungskühler 15 jedoch dem Tieftemperaturteil wesentlich näher als dem Direktkontaktkühler. In the embodiment of the evaporative cooler 15 is, however, the low-temperature part is much closer than the direct contact cooler. Der Abstand 104 zwischen dem Verdunstungskühler 15 und dem Hauptwärmetauscher 8a beträgt etwa ein Fünftel des Abstandes zwischen dem Direktkontaktkühler 3 und dem Tieftemperaturteil 7. Hierdurch muss die Reststickstoffleitung zwischen dem Hauptwärmetauscher und dem Verdunstungskühler 15, die in der Zeichnung nicht dargestellt ist, nur eine relativ kurze Strecke überwinden und kann daher besonders kostengünstig realisiert werden; The distance 104 between the evaporative cooler 15 and the main heat exchanger 8a is about a fifth of the distance between the direct contact cooler 3 and the low-temperature section 7. This has the residual nitrogen line between the main heat exchanger and the evaporative cooler 15, which is not shown in the drawing, only a relatively short overcome distance and can therefore be implemented particularly cost-effective; diese Einsparung fällt wegen des sehr großen Querschnitts der Reststickstoffleitung erheblich ins Gewicht. This saving falls because of the very large cross-section of the residual nitrogen line considerably significant. Die Kühlwasser-Verrohrung ist zwar länger, weist aber einen sehr viel geringeren Querschnitt auf und verteuert den Apparat nur unwesentlich. The cooling water piping is longer but has a much smaller cross section and more expensive the apparatus only slightly.
  • Tieftemperatur-Luftzerlegungsanlagen weisen regelmäßig eine oder mehrere Entspannungsmaschinen auf, die zur Erzeugung von Kälte durch arbeitsleistende Entspannung eines oder mehrerer Prozess-Ströme dienen und üblicherweise als Turbinen ausgebildet sind. A cryogenic air separation plants regularly have one or more expansion machines, which are used to generate refrigeration by work expansion of one or more process streams and are typically formed as turbines. Die Anlage des Ausführungsbeispiels weist vorzugsweise eine Turbine zur arbeitsleistenden Entspannung eines Teilstroms der Einsatzluft oder eines Produkt- oder Zwischenproduktstroms aus der Tieftemperaturzerlegung auf. The system of the embodiment preferably has a turbine for work expansion of a partial stream of the feed air or of a product or intermediate product stream from the cryogenic separation. Diese Turbine sitzt in einem Turbinenkasten 16, der in dem Ausführungsbeispiel am Übergangsabschnitt 10 zwischen Wärmetauscher-Box 8 und Rektifikationsbox 9 angeordnet ist. This turbine located in a turbine case 16 which is arranged in the embodiment, at the transition portion 10 between the heat exchanger box 8 and Rektifikationsbox. 9

Claims (7)

  1. Vorrichtung zur Erzeugung eines Produkts durch Tieftemperaturzerlegung eines Gasgemischs, insbesondere von Luft, mit einem Einsatzgasverdichter (2) zur Verdichtung des Einsatzgemischs, mit einem Direktkontaktkühler (3) zur Vorkühlung des Einsatzgemischs, mit einer Reinigungsvorrichtung (4) zur Reinigung des vorgekühlten Einsatzgemischs, mit einem Tieftemperaturteil (7), der einen Hauptwärmetauscher (8a) zur Abkühlung des gereinigten Einsatzgemischs auf etwa Taupunktstemperatur und eine Destilliersäule (9a) zur Tieftemperaturzerlegung des abgekühlten Einsatzgemischs aufweist, und mit einem Kühlmittelkreislauf (61) zur Lieferung von Kühlmittel für den Direktkontaktkühler, wobei der Kühlmittelkreislauf einen Verdunstungskühler (15) zur Abkühlung von Kühlmittel im direkten Wärmeaustausch mit einem Gasstrom aus dem Tieftemperaturteil aufweist, dadurch gekennzeichnet, dass das Verhältnis des Abstandes zwischen Verdunstungskühler (15) und Direktkontaktkühler (3) zu dem Abst Means for generating a product by low-temperature fractionation of a gas mixture, in particular air, with a feed gas compressor (2) for compression of the feed mixture with a direct contact cooler (3) for precooling the feed mixture, with a cleaning device (4) for cleaning the pre-cooled feed mixture with a low temperature part (7) including a main heat exchanger (8a) for cooling the purified feed mixture to about dew point and a distillation column (9a) for the low-temperature fractionation of the cooled feed mixture, and having a coolant circuit (61) for the supply of coolant for the direct contact cooler, wherein the coolant circuit having an evaporative cooler (15) for cooling the coolant in direct heat exchange with a gas stream from the low-temperature section, characterized in that the ratio of the distance between the evaporation cooler (15) and direct contact cooler (3) to the distances and (104) zwischen Verdunstungskühler (15) und Hauptwärmetauscher (8a) mindestens 0,5 , insbesondere mindestens 1,0 beträgt. and (104) between the evaporative cooler (15) and main heat exchanger (8a) of at least 0.5, especially at least 1.0.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Verhältnis des Abstandes zwischen Verdunstungskühler (15) und Direktkontaktkühler (3) zu dem Abstand (104) zwischen Verdunstungskühler (15) und Hauptwärmetauscher (8a) mindestens 2, insbesondere mindestens 4 beträgt. Device according to claim 1, characterized in that the ratio of the distance between the evaporation cooler (15) and direct contact cooler (3) is to the distance (104) between the evaporative cooler (15) and main heat exchanger (8a) of at least 2, especially at least. 4
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Abstand (104) zwischen Verdunstungskühler (15) und Hauptwärmetauscher (8a) höchstens 20 m, insbesondere höchstens 10 m beträgt. Device according to claim 1 or 2, characterized in that the distance (104) between the evaporative cooler (15) and main heat exchanger (8a) of at most 20 m, particularly at most 10 m.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Abstand zwischen Verdunstungskühler und Direktkontaktkühler (3) mindestens 10 m, insbesondere mindestens 25 m beträgt. Device according to one of claims 1 to 3, characterized in that the distance between the evaporative cooler and direct contact cooler (3) at least 10 m, in particular at least 25 m.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass dem Hauptwärmetauscher (8a) ein Direktkontaktkühler (3) zur Kühlung des Einsatzgemischs und eine Reinigungsvorrichtung (4) zu Reinigung des gekühlten Einsatzgemischs vorgeschaltet sind, wobei der Direktkontaktkühler (3), die Reinigungsvorrichtung (4) und der Tieftemperaturteil (7) auf einer Linie (101) angeordnet sind. Device are connected upstream of one of claims 1 to 4, characterized in that the main heat exchanger (8a), a direct contact cooler (3) for cooling the feed mixture and a cleaning device (4) for cleaning the cooled feed mixture, wherein the direct contact cooler (3), the cleaning device (4) and the low temperature portion (7) on a line (101) are arranged.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5, gekennzeichnet durch einen dem Direktkontaktkühler (3) vorgeschalteten Einsatzgasverdichter (2) zur Verdichtung des Einsatzgemischs, wobei der Einsatzgasverdichter (2), der Direktkontaktkühler (3), die Reinigungsvorrichtung (4) und der Tieftemperaturteil (7) auf einer Linie (101) angeordnet sind. Device according to one of claims 1 to 5, characterized by a the direct contact condenser (3) upstream feed gas compressor (2) for compression of the feed mixture, said feed gas compressor (2), the direct contact cooler (3), the cleaning device (4) and the low-temperature section (7 ) are arranged on a line (101).
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass einen dem Direktkontaktkühler (3) vorgeschalteten Einsatzgasverdichter (2) zur Verdichtung des Einsatzgemischs, wobei die Antriebswelle (11) des Einsatzgasverdichters (2) im Wesentlichen senkrecht oder im Wesentlichen parallel zu der Linie (101) verläuft, auf welcher der Direktkontaktkühler (3), die Reinigungsvorrichtung (4) und der Tieftemperaturteil (7) angeordnet sind. Device according to one of claims 1 to 6, characterized in that a the direct contact condenser (3) upstream feed gas compressor (2) for compression of the feed mixture, wherein the drive shaft (11) of the feed gas compressor (2) is substantially perpendicular or substantially parallel to the line (101) extends, on which the direct contact cooler (3), the cleaning device (4) and the low temperature portion (7) are arranged.
EP20040028681 2004-12-03 2004-12-03 Apparatus for the cryogenic separation of a gaseous mixture in particular of air Withdrawn EP1666822A1 (en)

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EP04028682 2004-12-03
EP20040028681 EP1666822A1 (en) 2004-12-03 2004-12-03 Apparatus for the cryogenic separation of a gaseous mixture in particular of air
EP20040028683 EP1666823A1 (en) 2004-12-03 2004-12-03 Apparatus for the cryogenic separation of a gaseous mixture in particular of air

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EP20040028683 EP1666823A1 (en) 2004-12-03 2004-12-03 Apparatus for the cryogenic separation of a gaseous mixture in particular of air
EP20040028681 EP1666822A1 (en) 2004-12-03 2004-12-03 Apparatus for the cryogenic separation of a gaseous mixture in particular of air
EP05024947.3A EP1672301B1 (en) 2004-12-03 2005-11-15 Apparatus for the cryogenic separation of a gaseous mixture in particular of air
PL05024947T PL1672301T3 (en) 2004-12-03 2005-11-15 Apparatus for the cryogenic separation of a gaseous mixture in particular of air
RU2005137481/06A RU2382963C2 (en) 2004-12-03 2005-12-02 Plant for cryogenic separation of mixture of gases, namely air
US11/292,282 US7516626B2 (en) 2004-12-03 2005-12-02 Apparatus for the low-temperature separation of a gas mixture, in particular air
CA 2528735 CA2528735C (en) 2004-12-03 2005-12-02 Apparatus for the low-temperature separation of a gas mixture, in particular air
CN 200510128991 CN100575838C (en) 2004-12-03 2005-12-05 Apparatus for the low-temperature separation of a gas mixture, in particular air

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EP20040028681 Withdrawn EP1666822A1 (en) 2004-12-03 2004-12-03 Apparatus for the cryogenic separation of a gaseous mixture in particular of air
EP05024947.3A Active EP1672301B1 (en) 2004-12-03 2005-11-15 Apparatus for the cryogenic separation of a gaseous mixture in particular of air

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