EP2553370A2 - Device for the cryogenic separation of air - Google Patents

Device for the cryogenic separation of air

Info

Publication number
EP2553370A2
EP2553370A2 EP11714930A EP11714930A EP2553370A2 EP 2553370 A2 EP2553370 A2 EP 2553370A2 EP 11714930 A EP11714930 A EP 11714930A EP 11714930 A EP11714930 A EP 11714930A EP 2553370 A2 EP2553370 A2 EP 2553370A2
Authority
EP
European Patent Office
Prior art keywords
column
mixing
mixing column
double
coldbox
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11714930A
Other languages
German (de)
French (fr)
Other versions
EP2553370B1 (en
Inventor
Stefan Lochner
Kurt Huber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE102010012920A external-priority patent/DE102010012920A1/en
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to PL11714930T priority Critical patent/PL2553370T3/en
Publication of EP2553370A2 publication Critical patent/EP2553370A2/en
Application granted granted Critical
Publication of EP2553370B1 publication Critical patent/EP2553370B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F25J3/0446—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the heat generated by mixing two different phases
    • F25J3/04466—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the heat generated by mixing two different phases for producing oxygen as a mixing column overhead gas by mixing gaseous air feed and liquid 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
    • F25J3/04763—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
    • F25J3/04872—Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.
    • 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
    • F25J3/0489—Modularity 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"
    • 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
    • F25J3/04945—Details of internal structure; insulation and housing of the cold box
    • 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
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system

Definitions

  • the invention relates to a device for the cryogenic separation of air according to the preamble of patent claim 1.
  • a coldbox is used for the thermal insulation of plant components (see, for example, Hausen / Linde, Tiefftemperaturtechnik, 1985, in particular pages 490 and 491).
  • a "cold box” is understood here as an insulating casing which has a
  • Separation columns and / or heat exchangers Separation columns and / or heat exchangers.
  • the insulating effect can be through
  • a powdery material such as perlite is preferably used.
  • the connecting elements can be made by any known technique, for example as profiles, tubes or a combination of such elements. They are preferably made of the same material as the column walls of mixing column and double column or of a similar material and are connected, for example by welding with these column walls. At the point of contact between connecting elements and column wall patches or reinforcing plates are preferably used, which consist of the same material as the column wall.
  • the connecting elements are preferably made of metal profiles, which are also formed of the same material. If the common coldbox prefabricated in the factory and
  • the connecting structure should be strong enough to absorb the forces from the horizontal transport.
  • a frame construction made of Cr-Ni steel can be additionally attached to the paving sheet, which reinforces the construction, but also causes a relatively large distance between the columns.
  • the mixing column is preferably not supported from below, but in particular is connected exclusively by the connecting elements with the double column. All information on the spatial orientation here refers to the orientation of the device during the operation of the columns.
  • a container for example a column or a heat exchanger
  • Upper edge (lower edge) of the other container is located. This may or may not be a vertical line passing through both containers. In the projection on a horizontal plane, the cross sections of the two containers may overlap, but they may also be arranged completely offset from one another. Analogously, the term "Germany'V'untrati" to understand.
  • the main heat exchanger is arranged in the common cold box, so that the device has a total of only a single coldbox.
  • the common cold box exceeds the permissible transport dimensions.
  • the main heat exchanger is arranged in a further, separate from the common coldbox coldbox.
  • the two cold boxes can be prefabricated in the workshop and then transported separately to the construction site.
  • the device may also include a subcooling countercurrent.
  • the subcooler countercurrent serves to subcool one or more liquids from one of the columns of the nitrogen-oxygen separation distillation column system or the mixing column in countercurrent to one or more cold gaseous streams, typically from the low pressure column to warm.
  • liquid streams boiling at a higher pressure column e.g.
  • the supercooling countercurrent can be arranged in a system with two cold boxes in the other coldbox.
  • the supercooling countercurrent is placed in the common coldbox below the mixing column.
  • the supercooling countercurrent is preferably arranged below the mixing column and is also with the
  • Double column in particular connected to the high pressure column.
  • the connection to the double column is realized by similar connecting elements as in the mixing column.
  • the upper end of the double column is realized by similar connecting elements as in the mixing column.
  • Mixing column arranged at least at the level of the upper end of the double column or at most one-fifth of the length of the double column below the upper end of the double column.
  • the mixing column hangs as high as possible. Under certain conditions, it may even make sense to build the box higher than necessary for the double column in order to allow the transport of the bottom liquid from the mixing column in the low-pressure column without a pump.
  • the additional steel construction costs can be outweighed by the saved pump costs. This applies in particular to a method with injection of turbine air into the mixing column, as shown, for example, in US Pat. No. 5,454,227 or US Pat. No. 5,490,391, the mixing column pressure being relatively low, in particular below that
  • the mixing column can also be arranged lower.
  • the upper ends of the mixing column and the double column are at the same geodetic height.
  • the vertical distance between the upper end of the double column and the upper end of the mixing column is preferably 0.4 m to 7.0 m.
  • the imaginary rectangle has at least one
  • the base area of the common coldbox can be optimized. It should be noted that the narrow side of the cold box corresponds to the transport height, which must not exceed a maximum value for prefabricated cold boxes; the other side of the rectangle is the result and should otherwise be as small as possible. In the case of construction site assembly is the
  • Figure 1 shows a first embodiment of the invention with an arrangement of
  • FIG. 2 shows the first exemplary embodiment in vertical cross-section
  • Figure 3 shows a second embodiment of the invention without supercooling countercurrent in the common coldbox
  • Figure 4 shows the common coldbox of the second embodiment in vertical
  • FIG. 1 Cross-sectional view.
  • a mixing column 1 and a subcooling countercurrent 2 are arranged in a common coldbox 3.
  • High-pressure column and low-pressure column of the distillation column system for nitrogen-oxygen separation are realized as a classic double column 5 and also housed in the common cold box 3.
  • Figure 2 shows the same arrangement in another view.
  • Bottom of the common cold box 3 is formed by a separate outer wall.
  • the double column 5 is supported via a frame, not shown, on the bottom 4 of the common cold box 3.
  • the mixing column 1 and the supercooling countercurrent are based on also not shown connecting elements on the double column 5 from. These connecting elements are the same or similar to the connecting elements shown in Figure 3 executed.
  • a main heat exchanger is housed in the first embodiment in a separate further coldbox (not shown in Figures 1 and 2).
  • the two dashed circles 1a and 1b in Figure 1 represent two modifications of the first embodiment, in which the mixing column is arranged offset to the supercooling countercurrent 2. However, the mixing column is also arranged above the supercooling countercurrent here (analogous to FIG. 2).
  • the mixing column 1 and the double column 5 are arranged in the common coldbox 3.
  • the subcooling countercurrent 2 is housed in another coldbox 12, together with the main heat exchanger 6.
  • the main heat exchanger 6 is formed in the embodiment by a single heat exchanger block, in particular one
  • Plate heat exchanger Alternatively, he can go through two or more horizontally
  • FIG. 4 shows the same common coldbox in a different view.
  • the space between the apparatus 1, 2, 5 and the outer wall of the common cold box 3 is filled with perlite.
  • Coldbox 3 is formed by a separate outer wall.
  • the double column 5 is supported on the bottom 4 of the common cold box 3 via a frame (frame), not shown.
  • the mixing column 1 is supported exclusively on the double column 5, specifically via at least two connecting elements which are respectively arranged in the upper and lower region of the mixing column 1.
  • the connecting elements are dimensioned accordingly, if necessary, more than two connecting elements can be used. In the illustrated
  • Embodiment two pairs of connecting elements are used, which are each arranged in the upper and lower regions of the mixing column 1.
  • the upper pair of these connecting elements 10, 11 is shown schematically in FIG.
  • the upper element is designed as a fixed point (welded or screwed on both columns), the lower but as a guide bearing to
  • This guide bearing fixes the horizontal arrangement and allows relative movement of mixing column and double column in the vertical direction.
  • the roughly dashed line 14 in Figure 3 represents a thought rectangle, which has purely geometric meaning, but which corresponds to no part of the apparatus. (The space between the dashed line 14 and the outer wall 3 of the box here marks the minimum insulation distance in which no cold component may be located.)
  • the imaginary rectangle 14 is in the horizontal, is oriented parallel to the walls of the coldbox 3 and lies also on the outer walls of the two columns 1, 5 at.
  • the mixing column 1 is preferably in a corner of this
  • Rectangles 14 arranged, that is, it is touched by the rectangle 14 in two places. ( Figure 4 does not fully illustrate this aspect for illustrative reasons.)
  • FIGS. 3 and 4 represent a modification of the first exemplary embodiment, in which the mixing column 1a is arranged differently.
  • the upper end 24 of the mixing column is located 0.4 m below the upper end 15 of the double column 5 at a total height of the double column of about 35 m.
  • the orientation of the two cold boxes to each other may be different from that shown in the drawings and depending on the spatial boundary conditions are arbitrary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The device serves for the cryogenic separation of air. It comprises a main heat exchanger (6) and a distillation column system for nitrogen-oxygen separation (5) with a double column (5), which contains a high-pressure column and a low-pressure column. The device also includes a mixing column (1) and means for introducing charge air via the main heat exchanger (6) into the high-pressure column and into the mixing column. A liquid oxygen line serves for introducing liquid oxygen from the low-pressure column into the upper region of the mixing column (1), an oxygen product line serves for extracting oxygen gas from the upper region of the mixing column (1) through the main heat exchanger (6). The mixing column (1) and the double column (5) are arranged in a common cold box (3). The mixing column (1) is attached to the double column (5) by way of connecting elements (10, 11).

Description

Beschreibung  description
Vorrichtung zur Tieftemperaturzerlegunq von Luft Apparatus for cryogenic decomposition of air
Die Erfindung betrifft eine Vorrichtung zur Tieftemperaturzerlegung von Luft gemäß dem Oberbegriff des Patentanspruchs 1. The invention relates to a device for the cryogenic separation of air according to the preamble of patent claim 1.
Luftzerlegungsverfahren mit Mischsäule sind seit den siebziger Jahren des vorigen Jahrhunderts bekannt (DE 2204376 = US 4022030). Außerdem sind solche Verfahren in US 5454227, US 5490391 , DE 19803437 A1 , DE 19951521 A1 , EP 1 139046 B1 (= US 2001052244 A1), EP 1284404 A1 (=US 6662595 B2), DE 10209421 A1 , DE 10217093 A1 , EP 1376037 B1 (=US 6776004 B2), EP 1387136 A1 und EP 1666824 A1 offenbart. Diese Schriften zeigen nur schematische Verfahrensdiagramme und enthalten keine Information über die räumliche Anordnung der Mischsäule in Bezug auf die übrigen Apparateteile. Eine Coldbox dient zur thermischen Isolierung von Anlagenteilen (siehe zum Beispiel Hausen/Linde, Tieftemperaturtechnik, 1985, insbesondere Seiten 490 und 491). Unter einer "Coldbox" wird hier eine isolierende Umhüllung verstanden, die einen Air separation processes with mixing column are known since the seventies of the last century (DE 2204376 = US 4022030). Furthermore, such processes are described in US Pat. No. 5,454,227, US Pat. No. 5,490,391, DE 19803437 A1, DE 19951521 A1, EP 1 139046 B1 (= US Pat. No. 2,001,024,244 A1), EP 1284404 A1 (= US Pat. No. 6662595 B2), DE 10209421 A1, DE 10217093 A1, EP 1376037 B1 (= US Pat. No. 6,776,004 B2), EP 1387136 A1 and EP 1666824 A1. These documents show only schematic process diagrams and contain no information about the spatial arrangement of the mixing column with respect to the other parts of the apparatus. A coldbox is used for the thermal insulation of plant components (see, for example, Hausen / Linde, Tiefftemperaturtechnik, 1985, in particular pages 490 and 491). A "cold box" is understood here as an insulating casing which has a
wärmeisolierten Innenraum vollständig mit Außenwänden umfasst; in dem Innenraum sind zu isolierenden Anlagenteile angeordnet, zum Beispiel ein oder mehrere thermally insulated interior complete with exterior walls; in the interior of equipment to be isolated parts are arranged, for example, one or more
Trennsäulen und/oder Wärmetauscher. Die isolierende Wirkung kann durch Separation columns and / or heat exchangers. The insulating effect can be through
entsprechende Ausgestaltung der Außenwände und/oder durch die Füllung des Zwischenraums zwischen Anlagenteilen und Außenwänden mit einem Isoliermaterial bewirkt werden. Bei der letzteren Variante wird vorzugsweise ein pulverförmiges Material wie zum Beispiel Perlite verwendet. corresponding configuration of the outer walls and / or be effected by the filling of the gap between system parts and outer walls with an insulating material. In the latter variant, a powdery material such as perlite is preferably used.
Aus DE 19904526 A1 ist bekannt, Hochdrucksäule, Niederdrucksäule und Mischsäule nebeneinander auf dem Boden anzuordnen. In US 6167723 wird ebenfalls empfohlen, die Mischsäule auf dem Boden aufzustellen, hier ist die Niederdrucksäule oberhalb der Mischsäule angeordnet, die Hochdrucksäule steht daneben. Auch in DE 19919587 A1 steht die Mischsäule auf dem Boden; die Doppelsäule aus Hochdrucksäule und Niederdrucksäule ist oberhalb der Mischsäule aufgebaut. From DE 19904526 A1 it is known to arrange high-pressure column, low-pressure column and mixing column next to one another on the floor. In US 6167723 it is also recommended to set up the mixing column on the ground, here the low-pressure column is arranged above the mixing column, the high-pressure column stands next to it. Also in DE 19919587 A1, the mixing column is on the ground; the double column of high-pressure column and low-pressure column is constructed above the mixing column.
BESTÄTIGUNGSKOPIE Der Erfindung liegt die Aufgabe zugrunde, eine verbesserte Anordnung der CONFIRMATION COPY The invention is based on the object, an improved arrangement of
Anlagenteile einer Mischsäule zu finden. To find plant components of a mixing column.
Diese Aufgabe wird dadurch gelöst, dass die Mischsäule über Verbindungselemente an der Doppelsäule befestigt ist. Grundsätzlich kann die Mischsäule an der This object is achieved in that the mixing column is fastened via connecting elements on the double column. Basically, the mixing column at the
Hochdrucksäule und/oder der Niederdrucksäule angeheftet sein, vorzugsweise ist sie ausschließlich mit der Niederdrucksäule verbunden.  Be attached to high pressure column and / or the low pressure column, preferably it is exclusively connected to the low pressure column.
Durch diese Befestigungsmethode ist es - im Unterschied zu der konventionellen Anordnung der Mischsäule auf dem Boden oder auf einem auf dem Boden stehenden Gestell - möglich, die geodätische Höhe, auf der die Mischsäule angeordnet ist, frei zu wählen. Hierdurch kann der Transport von Flüssigkeiten in der Anlage optimiert werden. In vielen Fällen ist es möglich, Pumpen mit kleinerer Leistung einzubauen oder sogar auf eine oder mehrere Pumpen zu verzichten. Dies gilt insbesondere bei relativ niedrigem Druck in der Mischsäule beziehungsweise im Sauerstoffgas- Produktgas aus der Mischsäule. By this method of attachment, it is - unlike the conventional arrangement of the mixing column on the ground or on a standing on the ground frame - possible to choose the geodetic height on which the mixing column is arranged freely. As a result, the transport of liquids in the system can be optimized. In many cases it is possible to install pumps with lower power or even to dispense with one or more pumps. This is especially true at relatively low pressure in the mixing column or in the oxygen gas product gas from the mixing column.
Die Verbindungselemente können mit jeder bekannten Technik ausgeführt werden, beispielsweise als Profile, Rohre oder eine Kombination derartiger Elemente. Sie bestehen vorzugsweise aus dem gleichen Material wie die Kolonnenwände von Mischsäule und Doppelsäule oder aus einem ähnlichen Material und werden beispielsweise durch Schweißen mit diesen Kolonnenwänden verbunden. An der Berührungsstelle zwischen Verbindungselementen und Kolonnenwand werden vorzugsweise Pflaster beziehungsweise Verstärkungsbleche eingesetzt, die aus dem gleichen Material wie die Kolonnenwand bestehen. Die Verbindungselemente bestehen vorzugsweise aus Metallprofilen, die ebenfalls aus dem gleichen Material gebildet sind. Falls die gemeinsame Coldbox in der Fabrik vorgefertigt und The connecting elements can be made by any known technique, for example as profiles, tubes or a combination of such elements. They are preferably made of the same material as the column walls of mixing column and double column or of a similar material and are connected, for example by welding with these column walls. At the point of contact between connecting elements and column wall patches or reinforcing plates are preferably used, which consist of the same material as the column wall. The connecting elements are preferably made of metal profiles, which are also formed of the same material. If the common coldbox prefabricated in the factory and
anschließend komplett zur Baustelle transportiert wird, muss die then transported completely to the site, the
Verbindungskonstruktion jedenfalls so stark sein, dass sie die Kräfte aus dem horizontalen Transport aufnimmt. Bei Bedarf kann am Pflasterblech zusätzlich eine Rahmenkonstruktion aus Cr-Ni-Stahl angebracht werden, welche die Konstruktion verstärkt, aber auch einen relativ großen Abstand zwischen den Kolonnen verursacht. In any case, the connecting structure should be strong enough to absorb the forces from the horizontal transport. If required, a frame construction made of Cr-Ni steel can be additionally attached to the paving sheet, which reinforces the construction, but also causes a relatively large distance between the columns.
Grundsätzlich ist dabei möglich, die Mischsäule zusätzlich von unten abzustützen, etwa auf einem unterhalb der Mischsäule angeordneten weiteren Apparateteil. Im Rahmen der Erfindung wird die Mischsäule jedoch vorzugsweise nicht von unten abgestützt, sondern insbesondere ausschließlich durch die Verbindungselemente mit der Doppelsäule verbunden. Alle Angaben zur räumlichen Orientierung beziehen sich hier auf Ausrichtung der Vorrichtung während des Betriebs der Kolonnen. In principle, it is possible to additionally support the mixing column from below, for example on a further apparatus part arranged below the mixing column. in the However, within the scope of the invention, the mixing column is preferably not supported from below, but in particular is connected exclusively by the connecting elements with the double column. All information on the spatial orientation here refers to the orientation of the device during the operation of the columns.
Ein Behälter (zum Beispiel eine Säule oder ein Wärmetauscher) befindet sich A container (for example a column or a heat exchanger) is located
"oberhalb" (beziehungsweise "unterhalb") eines anderen Behälters, wenn sich seine Unterkante (Oberkante) auf höherem (niedrigerem) geodätischen Niveau als die"above" (or "below") another container when its lower edge (upper edge) is at a higher (lower) geodesic level than the lower one
Oberkante (Unterkante) des anderen Behälters befindet. Dabei kann, muss aber nicht eine vertikale Linie existieren, die durch beide Behälter hindurchgeht. In der Projektion auf eine horizontale Ebene können sich die Querschnitte der beiden Behälter überschneiden, sie können aber auch vollständig versetzt zueinander angeordnet sein. Analog ist der Begriff "übereinander'V'untereinander" zu verstehen. Upper edge (lower edge) of the other container is located. This may or may not be a vertical line passing through both containers. In the projection on a horizontal plane, the cross sections of the two containers may overlap, but they may also be arranged completely offset from one another. Analogously, the term "übereinander'V'unteinander" to understand.
Es ist möglich, auch den Hauptwärmetauscher in der gemeinsamen Coldbox anzuordnen, sodass die Vorrichtung insgesamt nur eine einzige Coldbox aufweist. Hierbei besteht jedoch die Gefahr, dass die gemeinsame Coldbox die zulässigen Transportmaße überschreitet. In einer weiteren Ausgestaltung der Erfindung wird deshalb der Hauptwärmetauscher in einer weiteren, von der gemeinsamen Coldbox getrennten Coldbox angeordnet. Die beiden Coldboxen können in der Werkstatt vorgefertigt und anschließend getrennt voneinander zur Baustelle transportiert werden. Die Vorrichtung kann außerdem einen Unterkühlungs-Gegenströmer aufweisen. It is possible to arrange the main heat exchanger in the common cold box, so that the device has a total of only a single coldbox. However, there is a risk that the common cold box exceeds the permissible transport dimensions. In a further embodiment of the invention, therefore, the main heat exchanger is arranged in a further, separate from the common coldbox coldbox. The two cold boxes can be prefabricated in the workshop and then transported separately to the construction site. The device may also include a subcooling countercurrent.
Der Unterkühlungs-Gegenströmer dient dazu, eine oder mehrere Flüssigkeiten aus einer der Säulen des Destilliersäulen-Systems zur Stickstoff-Sauerstoff-Trennung oder der Mischsäule im Gegenstrom zu einem oder mehreren kalten gasförmigen Strömen, die in der Regel aus der Niederdrucksäule kommen, zu unterkühlen oder anzuwärmen. Insbesondere werden in einem Unterkühlungs-Gegenströmer flüssige Ströme, die mit Siedetemperatur aus einer Säule mit höheren Druck (zum Beispiel der The subcooler countercurrent serves to subcool one or more liquids from one of the columns of the nitrogen-oxygen separation distillation column system or the mixing column in countercurrent to one or more cold gaseous streams, typically from the low pressure column to warm. In particular, in a supercooling countercurrent, liquid streams boiling at a higher pressure column (e.g.
Hochdrucksäule) in eine Säule mit niedrigerem Druck (zum Beispiel die High pressure column) into a lower pressure column (for example the
Niederdrucksäule) entspannt werden, möglichst bis zu der Siedetemperatur abgekühlt, die dem niedrigeren Druckniveau entspricht. Dabei wird die Dampfmenge (Flash) bei der Entspannung vom höheren auf den niedrigeren Druck minimiert. Wenn der flüssige Sauerstoff aus der Niederdrucksäule vor der Einspeisung in die Mischsäule durch den Unterkühlungs-Gegenströmer geführt wird, wird dieser umgekehrt angewärmt, um möglichst nahe an den Siedepunkt unter dem - regelmäßig höheren - Druck der Mischsäule zu gelangen. Im Gegenzug dazu werden die kalten Ströme mit der Low pressure column) are relaxed, if possible cooled to the boiling point, which corresponds to the lower pressure level. The amount of steam (Flash) is minimized during the relaxation from the higher to the lower pressure. If the liquid Oxygen from the low pressure column is passed through the supercooling countercurrent upstream of the feed into the mixing column, this is heated in reverse order to get as close to the boiling point below the - regularly higher - pressure of the mixing column. In return, the cold streams with the
Tautemperatur aus den Säulen mit dem niedrigeren Druck angewärmt. Da dieseThawing temperature from the columns warmed to the lower pressure. This one
Ströme in den Hauptwärmetauscher gehen, wird die Prozessluft in die Hochdrucksäule ebenfalls wärmer, das heißt sie ist der Tautemperatur näher. Der Anteil der Streams go into the main heat exchanger, the process air in the high-pressure column is also warmer, that is, it is closer to the tide. The share of
vorverflüssigten Luft wird minimiert. Der Unterkühlungs-Gegenströmer kann bei einer Anlage mit zwei Coldboxen in der weiteren Coldbox angeordnet sein. Pre-liquefied air is minimized. The supercooling countercurrent can be arranged in a system with two cold boxes in the other coldbox.
Alternativ wird der Unterkühlungs-Gegenströmer in der gemeinsamen Coldbox unterhalb der Mischsäule angeordnet. Dabei wird der Unterkühlungs-Gegenströmer vorzugsweise unterhalb der Mischsäule angeordnet und ist ebenfalls mit der Alternatively, the supercooling countercurrent is placed in the common coldbox below the mixing column. In this case, the supercooling countercurrent is preferably arranged below the mixing column and is also with the
Doppelsäule, insbesondere mit der Hochdrucksäule, verbunden. Die Verbindung zur Doppelsäule wird durch ähnliche Verbindungselemente wie bei der Mischsäule realisiert. Gemäß einer weiteren Ausgestaltung der Erfindung ist das obere Ende der  Double column, in particular connected to the high pressure column. The connection to the double column is realized by similar connecting elements as in the mixing column. According to a further embodiment of the invention, the upper end of the
Mischsäule mindestens auf der Höhe des oberen Endes der Doppelsäule oder höchstens um ein Fünftel der Länge der Doppelsäule unterhalb des oberen Endes der Doppelsäule angeordnet. Vorzugsweise hängt die Mischsäule so weit oben wie möglich. Unter bestimmten Bedingungen kann es sogar sinnvoll sein, die Box höher als für die Doppelsäule notwendig zu bauen, um den Transport der Sumpfflüssigkeit aus der Mischsäule in die Niederdrucksäule ohne Pumpe zu ermöglichen. Die zusätzlichen Stahlbaukosten können dabei durch die eingesparten Pumpenkosten überwogen werden. Dies gilt insbesondere für ein Verfahren mit Einblasung von Turbinenluft in die Mischsäule, wie es beispielsweise in US 5454227 oder US 5490391 gezeigt ist, wobei der Mischsäulendruck relativ niedrig ist, insbesondere unterhalb des Mixing column arranged at least at the level of the upper end of the double column or at most one-fifth of the length of the double column below the upper end of the double column. Preferably, the mixing column hangs as high as possible. Under certain conditions, it may even make sense to build the box higher than necessary for the double column in order to allow the transport of the bottom liquid from the mixing column in the low-pressure column without a pump. The additional steel construction costs can be outweighed by the saved pump costs. This applies in particular to a method with injection of turbine air into the mixing column, as shown, for example, in US Pat. No. 5,454,227 or US Pat. No. 5,490,391, the mixing column pressure being relatively low, in particular below that
Hochdrucksäulendrucks. Bei höheren Mischsäulendrücken (hier wird die Turbinenluft meistens in die Niederdrucksäule eingeblasen wird, kann man die Mischsäule auch niedriger anordnen. Beispielsweise befinden sich die oberen Enden der Mischsäule und der Doppelsäule auf der gleichen geodätischen Höhe. Durch diese relativ hohe Position der Mischsäule kann auch bei relativ niedrigem Mischsäulendruck auf eine Pumpe zur Überleitung der Sumpfflüssigkeit der Mischsäule in die Niederdrucksäule verzichtet werden. High-pressure column pressure. At higher mixing column pressures (here the turbine air is mostly blown into the low-pressure column, the mixing column can also be arranged lower. For example, the upper ends of the mixing column and the double column are at the same geodetic height. As a result of this relatively high position of the mixing column, a pump for transferring the bottom liquid of the mixing column into the low-pressure column can be dispensed with even at a relatively low mixing column pressure.
Wenn das obere Ende der Mischsäule oberhalb oder unterhalb der des oberen Endes der Doppelsäule angeordnet ist, liegt der vertikale Abstand zwischen dem oberen Ende der Doppelsäule und dem oberen Ende der Mischsäule vorzugsweise bei 0,4 m bis 7,0 m. When the upper end of the mixing column is located above or below that of the upper end of the double column, the vertical distance between the upper end of the double column and the upper end of the mixing column is preferably 0.4 m to 7.0 m.
Besonders günstig ist eine Anordnung, bei der die Mischsäule in einer Ecke eines gedachten Rechtecks 14 angeordnet ist, das sich in der Horizontalen befindet, parallel zu den Wänden der gemeinsamen Coldbox orientiert ist und außerdem die Particularly favorable is an arrangement in which the mixing column is arranged in a corner of an imaginary rectangle 14, which is located in the horizontal, is oriented parallel to the walls of the common cold box and also the
Außenwände von Mischsäule und Doppelsäule berührt. Gegenüber den Außenwänden der gemeinsamen Coldbox weist das gedachte Rechteck mindestens einen Outer walls of mixing column and double column touched. Opposite the outer walls of the common coldbox, the imaginary rectangle has at least one
Isolierabstand von 450 mm auf. Dadurch kann die Grundfläche der gemeinsamen Coldbox optimiert werden. Dabei ist zu beachten, dass die Schmalseite der Coldbox der Transporthöhe entspricht, die bei vorgefertigten Coldboxen einen Höchstwert nicht überschreiten darf; die andere Seite des Rechtecks ergibt sich daraus und sollte ansonsten möglichst klein sein. Für den Fall der Baustellenmontage wird die  Insulating distance of 450 mm. As a result, the base area of the common coldbox can be optimized. It should be noted that the narrow side of the cold box corresponds to the transport height, which must not exceed a maximum value for prefabricated cold boxes; the other side of the rectangle is the result and should otherwise be as small as possible. In the case of construction site assembly is the
Mischsäule so angeordnet, dass das Coldboxvolumen minimiert wird.. Mixing column arranged so that the coldbox volume is minimized ..
Die Erfindung sowie weitere Einzelheiten der Erfindung werden im Folgenden anhand von in den Zeichnungen schematisch dargestellten Ausführungsbeispielen näher erläutert. Hierbei zeigen: The invention and further details of the invention are explained below with reference to embodiments schematically illustrated in the drawings. Hereby show:
Figur 1 ein erstes Ausführungsbeispiel der Erfindung mit Anordnung von Figure 1 shows a first embodiment of the invention with an arrangement of
Mischsäule und Unterkühlungs-Gegenströmer übereinander in horizontaler Querschnittsdarstellung,  Mixing column and subcooling countercurrents one above the other in horizontal cross section,
Figur 2 das erste Ausführungsbeispiel in vertikaler Querschnittsdarstellung, FIG. 2 shows the first exemplary embodiment in vertical cross-section,
Figur 3 ein zweites Ausführungsbeispiel der Erfindung ohne Unterkühlungs- Gegenströmer in der gemeinsamen Coldbox und Figure 3 shows a second embodiment of the invention without supercooling countercurrent in the common coldbox and
Figur 4 die gemeinsame Coldbox des zweiten Ausführungsbeispiels in vertikaler  Figure 4 shows the common coldbox of the second embodiment in vertical
Querschnittsdarstellung. In dem Beispiel von Figur 1 sind eine Mischsäule 1 und ein Unterkühlungs- Gegenströmer 2 in einer gemeinsamen Coldbox 3 angeordnet. Hochdrucksäule und Niederdrucksäule des Destilliersäulen-Systems zur Stickstoff-Sauerstoff-Trennung sind als klassische Doppelsäule 5 realisiert und ebenfalls in der gemeinsamen Coldbox 3 untergebracht. Figur 2 zeigt dieselbe Anordnung in anderer Ansicht. Cross-sectional view. In the example of FIG. 1, a mixing column 1 and a subcooling countercurrent 2 are arranged in a common coldbox 3. High-pressure column and low-pressure column of the distillation column system for nitrogen-oxygen separation are realized as a classic double column 5 and also housed in the common cold box 3. Figure 2 shows the same arrangement in another view.
Von der gemeinsamen Coldbox 3 sind in Figur 1 nur die seitlichen Außenwände dargestellt. Details wie Rohrleitungen, Ventile und das Innere der Apparate 1 , 2, 5, 6 sind in den Zeichnungen nicht gezeigt. Der Zwischenraum zwischen den Apparaten 1 , 2, 5, 6 und der Außenwand der gemeinsamen Coldbox 3 ist mit Perlite gefüllt. DieOf the common coldbox 3, only the lateral outer walls are shown in FIG. Details such as piping, valves and the interior of the apparatus 1, 2, 5, 6 are not shown in the drawings. The space between the apparatus 1, 2, 5, 6 and the outer wall of the common cold box 3 is filled with perlite. The
Unterseite der gemeinsamen Coldbox 3 wird durch eine separate Außenwand gebildet. Die Doppelsäule 5 ist über ein nicht dargestelltes Gestell auf dem Boden 4 der gemeinsamen Coldbox 3 abgestützt. Die Mischsäule 1 und der Unterkühlungs- Gegenströmer stützen sich über ebenfalls nicht dargestellte Verbindungselemente an der Doppelsäule 5 ab. Diese Verbindungselemente sind gleich oder ähnlich wie die in Figur 3 dargestellten Verbindungselemente ausgeführt. Bottom of the common cold box 3 is formed by a separate outer wall. The double column 5 is supported via a frame, not shown, on the bottom 4 of the common cold box 3. The mixing column 1 and the supercooling countercurrent are based on also not shown connecting elements on the double column 5 from. These connecting elements are the same or similar to the connecting elements shown in Figure 3 executed.
Ein Hauptwärmetauscher ist bei dem ersten Ausführungsbeispiel in einer separaten weiteren Coldbox untergebracht (in den Figuren 1 und 2 nicht dargestellt). A main heat exchanger is housed in the first embodiment in a separate further coldbox (not shown in Figures 1 and 2).
Die beiden gestrichelten Kreise 1a und 1b in Figur 1 stellen zwei Abwandlungen des ersten Ausführungsbeispiels dar, bei der die Mischsäule versetzt zum Unterkühlungs- Gegenströmer 2 angeordnet ist. Die Mischsäule ist jedoch auch hier oberhalb des Unterkühlungs-Gegenströmers angeordnet (analog zu Figur 2). The two dashed circles 1a and 1b in Figure 1 represent two modifications of the first embodiment, in which the mixing column is arranged offset to the supercooling countercurrent 2. However, the mixing column is also arranged above the supercooling countercurrent here (analogous to FIG. 2).
Auch in dem Beispiel von Figur 3 sind die Mischsäule 1 und die Doppelsäule 5 in der gemeinsamen Coldbox 3 angeordnet. Der Unterkühlungs-Gegenströmer 2 ist dagegen in einer weiteren Coldbox 12 untergebracht, zusammen mit dem Hauptwärmetauscher 6. Auch hier sind Details wie Rohrleitungen, Ventile und das Innere der Apparate 1 , 2, 5, 6 nicht gezeigt. Der Hauptwärmetauscher 6 wird in dem Ausführungsbeispiel durch einen einzigen Wärmetauscher-Block gebildet, insbesondere einen Also in the example of FIG. 3, the mixing column 1 and the double column 5 are arranged in the common coldbox 3. The subcooling countercurrent 2, however, is housed in another coldbox 12, together with the main heat exchanger 6. Again, details such as piping, valves and the interior of the apparatus 1, 2, 5, 6 are not shown. The main heat exchanger 6 is formed in the embodiment by a single heat exchanger block, in particular one
Plattenwärmetauscher. Alternativ kann er durch zwei oder mehr horizontal Plate heat exchanger. Alternatively, he can go through two or more horizontally
nebeneinander und/oder vertikal übereinander angeordnete Blöcke gebildet werden. Alternativ zu der Darstellung in Figur 3 kann der Unterkühlungs-Gegenströmer 2 unterhalb des Hauptwärmetauschers 6 angeordnet sein. Figur 4 zeigt dieselbe gemeinsame Coldbox in anderer Ansicht. side by side and / or vertically stacked blocks are formed. As an alternative to the representation in FIG. 3, the subcooling countercurrent 2 can be arranged below the main heat exchanger 6. FIG. 4 shows the same common coldbox in a different view.
Der Zwischenraum zwischen den Apparaten 1 , 2, 5 und der Außenwand der gemeinsamen Coldbox 3 ist mit Perlite gefüllt. Die Unterseite der gemeinsamenThe space between the apparatus 1, 2, 5 and the outer wall of the common cold box 3 is filled with perlite. The bottom of the common
Coldbox 3 wird durch eine separate Außenwand gebildet. Die Doppelsäule 5 ist über ein nicht dargestelltes Gestell (Standzarge) auf dem Boden 4 der gemeinsamen Coldbox 3 abgestützt. Die Mischsäule 1 stützt sich ausschließlich an der Doppelsäule 5 ab, und zwar über vorzugsweise über jeweils mindestens zwei Verbindungselemente die jeweils im oberen und unteren Bereich der Mischsäule 1 angeordnet sind. Die Verbindungselemente sind entsprechend dimensioniert, gegebenenfalls können auch mehr als zwei Verbindungselemente verwendet werden. In dem dargestellten Coldbox 3 is formed by a separate outer wall. The double column 5 is supported on the bottom 4 of the common cold box 3 via a frame (frame), not shown. The mixing column 1 is supported exclusively on the double column 5, specifically via at least two connecting elements which are respectively arranged in the upper and lower region of the mixing column 1. The connecting elements are dimensioned accordingly, if necessary, more than two connecting elements can be used. In the illustrated
Ausführungsbeispiel werden zwei Paare von Verbindungselementen verwendet, die jeweils im oberen und unteren Bereich der Mischsäule 1 angeordnet sind. Das obere Paar dieser Verbindungselemente 10, 11 ist in Figur 3 schematisch dargestellt. Embodiment two pairs of connecting elements are used, which are each arranged in the upper and lower regions of the mixing column 1. The upper pair of these connecting elements 10, 11 is shown schematically in FIG.
Vorzugsweise ist das obere Element als Festpunkt (an beiden Säulen geschweißt oder geschraubt) ausgeführt, das untere aber als Führungslager, um  Preferably, the upper element is designed as a fixed point (welded or screwed on both columns), the lower but as a guide bearing to
Temperaturspannungen zu kompensieren. Dieses Führungslager fixiert die horizontale Anordnung und ermöglicht ein relative Bewegung von Mischsäule und Doppelsäule in vertikaler Richtung. To compensate for temperature stresses. This guide bearing fixes the horizontal arrangement and allows relative movement of mixing column and double column in the vertical direction.
Die grob gestrichelte Linie 14 in Figur 3 stellt ein gedachtes Rechteck dar, das rein geometrische Bedeutung hat, dem aber kein Apparateteil entspricht. (Der Raum zwischen der gestrichelten Linie 14 und der Außenwand 3 der Box markiert hier den minimalen Isolierabstand in dem sich kein kaltes Bauteil befinden darf.) Das gedachte Rechteck 14 befindet sich in der Horizontalen, ist parallel zu den Wänden der Coldbox 3 orientiert und liegt außerdem an den Außenwänden der beiden Kolonnen 1 , 5 an. Im Rahmen der Erfindung ist die Mischsäule 1 vorzugsweise in einer Ecke dieses The roughly dashed line 14 in Figure 3 represents a thought rectangle, which has purely geometric meaning, but which corresponds to no part of the apparatus. (The space between the dashed line 14 and the outer wall 3 of the box here marks the minimum insulation distance in which no cold component may be located.) The imaginary rectangle 14 is in the horizontal, is oriented parallel to the walls of the coldbox 3 and lies also on the outer walls of the two columns 1, 5 at. In the context of the invention, the mixing column 1 is preferably in a corner of this
Rechtecks 14 angeordnet, das heißt sie wird an zwei Stellen von dem Rechteck 14 berührt. (Figur 4 stellt diesen Aspekt aus zeichnerischen Gründen nicht vollständig korrekt dar.) Rectangles 14 arranged, that is, it is touched by the rectangle 14 in two places. (Figure 4 does not fully illustrate this aspect for illustrative reasons.)
Die fein gestrichelten Linien in den Figuren 3 und 4 stellen eine Abwandlung des ersten Ausführungsbeispiels dar, bei der die Mischsäule 1a abweichend angeordnet ist. In dem Ausführungsbeispiel der Figuren 3 und 4 ist das obere Ende 24 der Mischsäule 0,4 m unterhalb des oberen Endes 15 der Doppelsäule 5 angeordnet bei einer Gesamthöhe der Doppelsäule von etwa 35 m. Die Orientierung der beiden Coldboxen zueinander kann abweichend von der in den Zeichnungen dargestellten sein und je nach räumlichen Randbedingungen beliebig gewählt werden. The finely dashed lines in FIGS. 3 and 4 represent a modification of the first exemplary embodiment, in which the mixing column 1a is arranged differently. In the embodiment of Figures 3 and 4, the upper end 24 of the mixing column is located 0.4 m below the upper end 15 of the double column 5 at a total height of the double column of about 35 m. The orientation of the two cold boxes to each other may be different from that shown in the drawings and depending on the spatial boundary conditions are arbitrary.

Claims

Patentansprüche claims
1. Vorrichtung zur Tieftemperaturzerlegung von Luft mit einem Hauptwärmetauscher (6), mit einem Destilliersäulen-System zur Stickstoff-Sauerstoff-Trennung (5), das eine Doppelsäule (5) aufweist, die eine Hochdrucksäule und eine A device for cryogenic separation of air with a main heat exchanger (6), with a distillation column system for nitrogen-oxygen separation (5), which has a double column (5) having a high-pressure column and a
Niederdrucksäule enthält, mit einer Mischsäule (1) und mit Mitteln zum Einleiten von Einsatzluft über den Hauptwärmetauscher (6) in die Hochdrucksäule und in die Mischsäule, mit einer Flüssigsauerstoffleitung zum Einleiten von flüssigem Sauerstoff aus der Niederdrucksäule in den oberen Bereich der Mischsäule (1) und mit einer Sauerstoffproduktleitung zum Abziehen von Sauerstoffgas aus dem oberen Bereich der Mischsäule (1) durch den Hauptwärmetauscher (6), wobei die Low pressure column containing, with a mixing column (1) and means for introducing feed air via the main heat exchanger (6) in the high pressure column and in the mixing column, with a liquid oxygen line for introducing liquid oxygen from the low pressure column in the upper region of the mixing column (1) and with an oxygen product line for drawing off oxygen gas from the upper portion of the mixing column (1) through the main heat exchanger (6), the
Mischsäule (1) und die Doppelsäule (5) in einer gemeinsamen Coldbox (3) angeordnet sind, dadurch gekennzeichnet, dass die Mischsäule (1 ) über Verbindungselemente (10, 11) an der Doppelsäule (5) befestigt ist. Mixing column (1) and the double column (5) are arranged in a common coldbox (3), characterized in that the mixing column (1) via connecting elements (10, 11) on the double column (5) is attached.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Mischsäule (1 ) nicht von unten abgestützt ist. 2. Device according to claim 1, characterized in that the mixing column (1) is not supported from below.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der 3. Apparatus according to claim 1 or 2, characterized in that the
Hauptwärmetauscher (6) in einer weiteren, von der gemeinsamen Coldbox (3) getrennten Coldbox (12) angeordnet ist.  Main heat exchanger (6) in a further, from the common coldbox (3) separated coldbox (12) is arranged.
4. Vorrichtung nach einem der Anspruch 3, gekennzeichnet durch einen 4. Device according to one of claim 3, characterized by a
Unterkühlungs-Gegenströmer (2), der in der weiteren Coldbox (12) angeordnet ist.  Subcooling countercurrent (2), which is arranged in the other coldbox (12).
5. Vorrichtung nach einem der Ansprüche 1 bis 3, gekennzeichnet durch einen 5. Device according to one of claims 1 to 3, characterized by a
Unterkühlungs-Gegenströmer (2), der in der gemeinsamen Coldbox (3) unterhalb der Mischsäule (1) angeordnet ist.  Subcooling countercurrent (2), which is arranged in the common coldbox (3) below the mixing column (1).
6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das obere Ende (24) der Mischsäule (1) mindestens auf der Höhe des oberen Endes6. Device according to one of claims 1 to 5, characterized in that the upper end (24) of the mixing column (1) at least at the height of the upper end
(15) der Doppelsäule (5) oder höchstens um ein Fünftel der Länge der (15) the double column (5) or at most one fifth of the length of the
Doppelsäule (5) unterhalb des oberen Endes der Doppelsäule (5) angeordnet ist. Double column (5) below the upper end of the double column (5) is arranged.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Mischsäule (1) in einer Ecke eines Rechtecks (14) angeordnet ist, das in der Horizontalen liegt, parallel zu den Wänden der gemeinsamen Coldbox (3) orientiert ist und die Außenwände der von Mischsäule (1) und Doppelsäule (5) berührt. 7. Device according to one of claims 1 to 6, characterized in that the mixing column (1) is arranged in a corner of a rectangle (14) which lies in the horizontal, parallel to the walls of the common coldbox (3) is oriented and the outer walls of the mixing column (1) and double column (5) touched.
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WO2011116981A3 (en) 2012-08-30
PL2553370T3 (en) 2019-11-29
EP2553370B1 (en) 2019-05-15
WO2011116981A2 (en) 2011-09-29

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