EP1015827B1 - Low-temperature air separation installation - Google Patents

Low-temperature air separation installation Download PDF

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Publication number
EP1015827B1
EP1015827B1 EP98941421A EP98941421A EP1015827B1 EP 1015827 B1 EP1015827 B1 EP 1015827B1 EP 98941421 A EP98941421 A EP 98941421A EP 98941421 A EP98941421 A EP 98941421A EP 1015827 B1 EP1015827 B1 EP 1015827B1
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EP
European Patent Office
Prior art keywords
rectification column
heat exchanger
installation according
elements
insulation chamber
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.)
Expired - Lifetime
Application number
EP98941421A
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German (de)
French (fr)
Other versions
EP1015827B2 (en
EP1015827A1 (en
Inventor
Klaus-Peter Walter
Bernd Holling
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Messer Griesheim GmbH
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Messer Griesheim GmbH
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Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
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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
    • F25J3/04763—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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
    • 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
    • F25J3/044—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a single pressure main column system only
    • 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—Nitrogen

Definitions

  • the invention relates to a plant for the low-temperature separation of air, with at least one rectification column with an air line for the supply of Separation air, with a nitrogen line to draw off a nitrogen fraction, with connected to an oxygen line for withdrawing an oxygen fraction and from is surrounded by at least one insulating jacket which delimits an insulating space, through which the lines are led to the rectification column and with which the Rectification column is connected.
  • Plants for the low-temperature separation of air essentially consist of one or more rectification columns, the function of which is that in one Heat exchanger to air cooled to approx. Minus 170 ° C into its components disassemble.
  • the decomposition can Rectification column.
  • the oxygen-rich fraction is in the bottom of the column withdrawn liquid and evaporated in the condenser.
  • At the top of the column gaseous pure nitrogen taken to obtain it as a product and a the second part is liquefied in the condenser.
  • Liquid nitrogen is fed into the column from a storage tank.
  • the storage tank is made from an external source with liquid nitrogen fed.
  • Storage tank and rectification column are arranged side by side.
  • the Liquid nitrogen storage tank is isolated by a vacuum container that encompasses the outer shell of the storage container and its between the inner and Outer container formed insulation room is evacuated.
  • the rectification column which is extremely cold during operation, is installed in a sheet metal jacket free space is filled with insulating material. International has for this the name “cold box” is naturalized.
  • the rectification column is usually connected to the sheet metal jacket via rigid elements which form a fixed bearing on the side facing the floor.
  • the elements are detachably or non-releasably attached to the rectification column and / or the sheet metal jacket.
  • the rectification column stands on the elements while the opposite end is fixed in the isolation room.
  • fixing elements and / or transport securing elements are provided adjacent to the free end of the rectification column, which support the free end of the rectification column on the insulating jacket, so that the rectification column is fixed at the free end in the operating position and can be transported horizontally.
  • the elements are rigidly connected to the insulating jacket and the rectification column.
  • a disadvantage of such a rigid fastening by means of screw or welded connections is that they allow almost no change in the dimensions of the rectification column during operation, which occur due to the large temperature difference between the transport and operating temperatures, since the materials are due to the cryogenic operating temperature of approximately -170 ° C shrink. This requires a high manufacturing and calculation effort to master the expansion of the system parts and, if necessary, a functional separation into fixing elements and transport securing elements that have to be removed after the transport.
  • the fasteners are heavy and deteriorate the heat balance of the system due to heat conduction.
  • the invention has for its object a system for Create low temperature separation of air in the without assembly / demotage of Splitting the cold box simplifies the fixation of at least the rectification column can be.
  • the invention enables a much easier attachment of the Isolation space arranged system parts, such as rectifying column and / or Heat exchanger, since these plant parts arranged in the insulation room rope-shaped bracing elements are connected to the insulating jacket, which the Keep the system parts in the isolation room in the specified position. Take over here the rope-like elements at the same time fixing and securing the transport Rectification column and / or the heat exchanger.
  • the rope-shaped elements are at one end with the Rectification column and / or the heat exchanger connected via clamps that the Rectification column and / or the heat exchanger ring-shaped on its circumference surrounded to absorb the tensile forces occurring during the bracing.
  • the Clamps are on the taking into account the usual tolerances Rectification column; if necessary, intermediate layers of PTFE between the rectification column and the clamps. They have U-shaped shapes Connecting elements on which the rope-shaped elements are attached. The Attaching and replacing the rope-shaped elements is so easy make.
  • the clamps are made of a material that is less Has thermal expansion value than the material of the rectification column and / or of the heat exchanger.
  • the material of the clamps is stainless steel
  • the material of Rectification column is aluminum.
  • the rectifier column's material shrinks at operating temperatures of approx. -170 ° C stronger than the material of the clamps, what a change in the dimensions of the rectification column, especially in the Length, allowed.
  • the rope-shaped elements act as Transport securing elements that transport the cold box in the Allow horizontal lines without the rectification column and / or the Heat exchangers are subject to significant bending stress.
  • the cold box can be fully assembled and in the manufacturer horizontal position to the operator of the system at ambient temperature transported and operated without dismantling parts of the system.
  • the rope-shaped elements When the system is in operation, the rope-shaped elements absorb the thermal expansion of insulating jacket and rectification column and / or heat exchanger due to the different temperatures of the system parts at the different Operating states (in operation / out of operation) are present.
  • each rope-shaped element consists of a rope, the ends of which are designed as eye terminals, which are fastened in terminals.
  • Each cable-shaped element can be adjusted in length using threaded rods connected to the insulating jacket and a left / right nut (nut with a left and right hand thread) in which the U-shaped terminals are screwed.
  • the bearings are made of insulating materials such as glass fiber reinforced plastic (GRP) arranged between the bearing and the inner surface of the insulating jacket as intermediate layers.
  • GRP glass fiber reinforced plastic
  • the isolation room with insulating material for. B. "Perlite", filled with a density between 40 to 80 kg / m 3 .
  • the heat exchanger is advantageously arranged in which the Decomposition air is cooled against product flows.
  • An optimized heat balance of the heat exchanger can be achieved within the insulation space by that the heat exchanger with the side into which the separation air enters and the Product flows emerge at a temperature level of approximately plus 10 ° C is inclined towards the insulating jacket and thus in the immediate vicinity of the warmer Isoliermantels is arranged during the decomposition air and the Product flow inlet is arranged near the rectification column, so that the side of the. lying at a temperature level of approx Heat exchanger at approximately the same or similar temperature level lying rectification column is inclined.
  • Temperature distribution in the at least powder-insulated insulation room is Thermal balance of the system through the insulation and the arrangement of the Plant parts and rectification column significantly optimized so that the expansion the system parts is reduced.
  • the heat exchanger is fixed below an angle by means of the rope-shaped elements described above particularly easy to achieve.
  • the System essentially consists of a liquid gas container 10, one Rectification column 15 with top condenser 16 and a heat exchanger 17. Die Image is not to scale, a rectification column 15 is in relation to Liquid gas container 10 generally much higher than that shown.
  • the LPG container 10 for the LPG 11 is made in the usual way an inner container 12 and an outer container 13, the space between them 14 is powder-vacuum insulated. Rectification column 15 with top capacitor 16 and Heat exchangers 17 are surrounded by an insulating jacket 18.
  • the insulating jacket consists of unalloyed structural steel and encloses rectification column 15 with Top condenser 16 and heat exchanger 17.
  • the from the insulating jacket 18th Isolation space 23 is surrounded with insulation, such.
  • B. Perlite The Perlite fill all cavities of the isolation space 23 and surround them Rectification column 15 with the top condenser 16, the heat exchanger 17 and all further components, such as pipes, arranged in the insulation space 23, Control fittings and the like.
  • the rectification column 15 stands on bearings 24, which act as feet formed and connected to the insulating jacket 18. Take the bearings 24 the weight of the rectification column. About its length is the Rectification column with rope-shaped elements 20, 21, 22, 25, 26 braced laterally. Rope-shaped elements can all elements, such as stainless steel ropes, chains, Tension rods and the like when used to brace the rectification column 15 are suitable.
  • the rectification column is at least on three sides (120 °) tensioned in its length by means of adjusting elements 60, 61, 66.
  • the adjusting elements 60, 61, 66 each consist of one with the insulating jacket 18 connected threaded rod 62, which in a nut 63 with left / Right-hand thread is screwed. From the other side is a U-shaped terminal 64 screwed into the nut 63 by means of a threaded rod attached to it. When the nut 63 is turned, the threaded rods move towards one another or away from each other.
  • the one stored and fastened in the terminal 64 rope-shaped element 26 is correspondingly in the direction of the insulating jacket 18th pulled or or relaxed towards the rectification column.
  • the rope-shaped elements 20, 21, 22, 25, 26 are stationary on the side facing the rectification column 15 arranged terminals 65 stored.
  • the adjustable and stationary terminals 64, 65 together with the rope ends ending in eye bolts 67, 68 Joints.
  • the stationary terminals 65 are attached to clamps 19, 51, which the Rectification column 15 embrace annularly on its circumference.
  • the clamps 19, 51 with the rectifying column 15 surrounds the rope-shaped elements 20, 21, 22, 25, 26 adjacent to the end opposite the bearing 24.
  • the bells consist of a material, for example stainless steel, which is a lesser Has thermal expansion value than the material, for example aluminum, the rectification column.
  • the heat exchanger 17 is preferably arranged in the insulation space 23, to which compressed and purified air is supplied via line 28. The cold air is blown into the lower region of the rectification column 15.
  • the rectification column 15 is preferably under a pressure of 4.5 to 12 bar operated about 6 bar. It is in the embodiment with two sections 29, 30 equipped by orderly packs or sieve trays. Above the Pack sections 29, 30 are each a liquid collector and distributor 31, 32 intended.
  • An oxygen-enriched sump liquid can be supplied via an oxygen line 33 be removed.
  • a nitrogen line 34 carries gaseous nitrogen as Product through the heat exchanger 17.
  • In the upper area of the rectification column 15 also opens a first feed line 35, directly into the upper Liquid collector 31. It serves for the supply and discharge of liquid nitrogen and connects the interior of rectification column 15 and nitrogen tank 10.
  • a top condenser 16 serves to liquefy nitrogen at the top of the Rectification column 15.
  • the passages indicated in the drawing are for Interior of the rectification column open and thus form the nitrogen passages.
  • Oxygen-enriched liquid is present in the exterior of the passages is brought up via the oxygen line 33. It evaporates in direct Heat exchange with condensing nitrogen. The evaporated fraction is over an oxygen product line 36 is removed and in the heat exchanger 17 against Decomposition air 28 warmed.
  • the heat exchanger 17 has two support brackets 37 on the insulating jacket 18 attached.
  • the support brackets are the warm end (+ 10 ° C) of the Heat exchanger 17 assigned and bear the vertical loads of this.
  • the heat exchanger 17 is arranged in the isolation room so that the Oxygen product inlet 38 is further away from the insulating jacket than that Oxygen product outlet 39. Characterized in that the heat exchanger 17 under one Angle 70 between 3 and 10 degrees, preferably at an angle of 5 degrees with its cold end (approx. - 170 ° C) inclined towards the rectification column the need for cooling is reduced since the warm end is the warmer Insulating jacket 18 and the cold end of the heat exchanger of the rectification column assigned.
  • the attachment and orientation of the cold end of the Heat exchanger 17 takes place via rope-shaped elements 40, 41, 46, 47, which as Rope bracing are formed.
  • the rope-shaped elements 40, 41, 46, 47 are corresponding to those in connection with the rope tensioning of the Rectification column described rope-shaped elements.
  • the ropes 40, 41, 46, 47 end in eyebolts 67, 68 which are adjustable in U-shaped and stationary terminals 64, 65 are stored.
  • the rope-shaped elements 46, 47 and 40, 41 cross each other at an angle 71 of 45 ° to Longitudinal axis 72 of the heat exchanger 17.
  • the rope-shaped elements 40, 41, 46, 47 are on the heat exchanger 17 by means of Clamps 50 attached.
  • valve 42 The fill level of the column sump of the rectification column is checked by means of a valve 42 controlled, which is arranged in the oxygen line 33.
  • Valve 42 is arranged within the isolation space 23 and powder-insulated.
  • control device 44 about one the control device 44 is also a powder-insulated outlet piece 43, for example, a control valve spindle, through the insulating jacket 18 to the outside guided and connected to a drive 45 so that the valve from the outside is adjustable.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Processing Of Solid Wastes (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

The invention relates to an installation for the low-temperature separation of air, comprising at least one rectifying column which is disposed in an insulating chamber (23). In order to simplify the attachment of the rectifying column (15) in the insulating chamber (23), said rectifying column (23) is stayed in the insulating chamber by means of rope shaped members (25, 26, 40, 41) in such a way that it is disposed in a predetermined position.

Description

Die Erfindung betrifft eine Anlage zur Tieftemperaturzerlegung von Luft, mit mindestens einer Rektifiziersäule, die mit einer Luftleitung zur Zufuhr von Zerlegungsluft, mit einer Stickstoffleitung zum Abzug einer Stickstofffraktion, mit einer Sauerstoffleitung zum Abzug einer Sauerstofffraktion verbunden und von mindestens einem Isoliermantel umgeben ist, der einen Isolierraum begrenzt, durch den die Leitungen zur Rektifiziersäule geführt sind und mit dem die Rektifiziersäule verbunden ist.The invention relates to a plant for the low-temperature separation of air, with at least one rectification column with an air line for the supply of Separation air, with a nitrogen line to draw off a nitrogen fraction, with connected to an oxygen line for withdrawing an oxygen fraction and from is surrounded by at least one insulating jacket which delimits an insulating space, through which the lines are led to the rectification column and with which the Rectification column is connected.

Anlagen zur Tieftemperaturzerlegung von Luft bestehen im wesentlichen aus einer oder mehreren Rektifiziersäulen deren Funktion darin besteht, die in einem Wärmetauscher auf ca. minus 170°C abgekühlte Luft in ihre Bestandteile zu zerlegen. Bei einer Anlage zur Stickstoffgewinnung kann die Zerlegung in einer Rektifiziersäule erfolgen. Die sauerstoffreiche Fraktion wird im Sumpf der Säule flüssig abgezogen und im Kondensator verdampft. Am Kopf der Säule wird gasförmiger reiner Stickstoff entnommen, um ihn als Produkt zu gewinnen und ein zweiter Teil wird im Kondensator verflüssigt. Zum Ausgleich der Kältebilanz wird flüssiger Stickstoff aus einem Speichertank in die Säule eingespeist.Plants for the low-temperature separation of air essentially consist of one or more rectification columns, the function of which is that in one Heat exchanger to air cooled to approx. Minus 170 ° C into its components disassemble. In the case of a plant for the production of nitrogen, the decomposition can Rectification column. The oxygen-rich fraction is in the bottom of the column withdrawn liquid and evaporated in the condenser. At the top of the column gaseous pure nitrogen taken to obtain it as a product and a the second part is liquefied in the condenser. To compensate for the cold balance Liquid nitrogen is fed into the column from a storage tank.

Der Speichertank wird dabei aus einer äußeren Quelle mit Flüssigstickstoff beschickt. Speichertank und Rektifiziersäule sind nebeneinander angeordnet. Der Speichertank für flüssigen Stickstoff ist durch einen Vakuumbehälter isoliert, der die äußere Hülle des Speicherbehälters umgreift und dessen zwischen Innenund Außenbehälter gebildeter Isolationsraum evakuiert ist.The storage tank is made from an external source with liquid nitrogen fed. Storage tank and rectification column are arranged side by side. The Liquid nitrogen storage tank is isolated by a vacuum container that encompasses the outer shell of the storage container and its between the inner and Outer container formed insulation room is evacuated.

Die im Betrieb tiefkalte Rektifiziersäule ist in einem Blechmantel eingebaut deren freigebliebener Raum mit Isoliermaterial ausgefüllt ist. International hat sich hierfür der Name "cold box" eingebürgert.The rectification column, which is extremely cold during operation, is installed in a sheet metal jacket free space is filled with insulating material. International has for this the name "cold box" is naturalized.

Üblicher Weise erfolgt die Verbindung der Rektifiziersäule mit dem Blechmantel über starre Elemente die ein Festlager an der zum Boden gerichteten Seite bilden. Die Elemente sind an der Rektifiziersäule und/oder dem Blechmantel lösbar oder unlösbar befestigt. Im Betrieb steht die Rektifiziersäule auf den Elementen während das gegenüberliegende Ende im Isolationsraum fixiert ist. Hierzu sind benachbart zum freien Ende der Rektifiziersäule Fixierelemente und/oder Transportsicherungselemente vorgesehen, die das freie Ende der Rektifiziersäule am Isoliermantel abstützen, damit die Rektifiziersäule am freien Ende in der Betriebsstellung fixiert ist und in der Horizontalen transportiert werden kann.
Die Elemente sind starr mit dem Isoliermantel und der Rektifiziersäule verbunden. Nachteilig ist bei einer derartigen starren Befestigung mittels Schraub- oder Schweißverbindungen, daß sie im Betrieb nahezu keine Veränderung der Abmessungen der Rektifiziersäule erlauben, die aufgrund des großen Temperaturunterschiedes zwischen Transport- und Betriebstemperatur auftreten, da die Werkstoffe aufgrund der tiefkalten Betriebstemperatur von ca -170° C schrumpfen. Dies erfordert einen hohen Fertigungs- und Berechnungsaufwand um die Ausdehnung der Anlagenteile zu beherrschen und gegebenenfalls eine Funktionstrennung in Fixierelemente und Transportsicherungselemente, die nach dem Transport entfernt werden müssen.The rectification column is usually connected to the sheet metal jacket via rigid elements which form a fixed bearing on the side facing the floor. The elements are detachably or non-releasably attached to the rectification column and / or the sheet metal jacket. In operation, the rectification column stands on the elements while the opposite end is fixed in the isolation room. For this purpose, fixing elements and / or transport securing elements are provided adjacent to the free end of the rectification column, which support the free end of the rectification column on the insulating jacket, so that the rectification column is fixed at the free end in the operating position and can be transported horizontally.
The elements are rigidly connected to the insulating jacket and the rectification column. A disadvantage of such a rigid fastening by means of screw or welded connections is that they allow almost no change in the dimensions of the rectification column during operation, which occur due to the large temperature difference between the transport and operating temperatures, since the materials are due to the cryogenic operating temperature of approximately -170 ° C shrink. This requires a high manufacturing and calculation effort to master the expansion of the system parts and, if necessary, a functional separation into fixing elements and transport securing elements that have to be removed after the transport.

Dabei weisen die Befestigungselemente ein hohes Gewicht auf und verschlechtern aufgrund von Wärmeleitung die Wärmebilanz der Anlage.The fasteners are heavy and deteriorate the heat balance of the system due to heat conduction.

Die des Weiteren aus der US-A-5 205 042 bekannten, zur elastischen Verspannung der Rektifiziersäule mit dem Isolationsmantel zweckentsprechend angeordneten, flachen Rechteckstahl-Elemente weisen ebenfalls die vorab aufgezeigten Nachteile auf.The further known from US-A-5 205 042 for elastic Bracing the rectification column with the insulation jacket appropriately arranged, flat rectangular steel elements also have the in advance identified disadvantages.

Der Erfindung liegt die Aufgabe zugrunde, eine Anlage zur Tieftemperaturzerlegung von Luft schaffen, bei der ohne Montage/Demotage von Teilen der cold box die Fixierung mindestens der Rektifiziersäule vereinfacht werden kann. The invention has for its object a system for Create low temperature separation of air in the without assembly / demotage of Splitting the cold box simplifies the fixation of at least the rectification column can be.

Diese Aufgabe wird dadurch gelöst, daß mindestens die Rektifiziersäule mittels seilförmigen Elementen so im Isolationsraum verspannt ist, daß sie in einer vorgegebenen Lage angeordnet ist.This object is achieved in that at least the rectification column by means of rope-shaped elements is so braced in the isolation room that they are in a predetermined position is arranged.

Die Erfindung ermöglicht eine wesentlich einfachere Befestigung der im Isolationsraum angeordneten Anlagenteile, wie Rektifziersäule und/oder Wärmetauscher, da diese im Isolationsraum angeordneten Anlagenteile über seilförmige Abspannelemente mit dem Isoliermantel verbunden sind, die die Anlagenteile im Isolationsraum in vorgegebener Lage halten. Dabei übernehmen die seilförmigen Elemente gleichzeitig die Fixierung und Transportsicherung der Rektifiziersäule und/oder des Wärmetauschers.The invention enables a much easier attachment of the Isolation space arranged system parts, such as rectifying column and / or Heat exchanger, since these plant parts arranged in the insulation room rope-shaped bracing elements are connected to the insulating jacket, which the Keep the system parts in the isolation room in the specified position. Take over here the rope-like elements at the same time fixing and securing the transport Rectification column and / or the heat exchanger.

Unter flexiblen seilförmigen Elementen werden Seile, Ketten, Zugstangen und dergleichen verstanden, die mindestens die Rektifiziersäule in dem Isoliermantel verspannen. Die seilförmigen Elemente sind mit ihrem einen Ende mit der Rektifiziersäule und/oder dem Wärmetauscher über Schellen verbunden, die die Rektifiziersäule und /oder den Wärmetauscher an ihrem Umfang ringförmig umgeben, um die bei der Verspannung auftretenden Zugkräfte aufzunehmen. Die Schellen liegen unter Berücksichtigung üblicher Toleranzen an der Rektifiziersäule an; gegebenenfalls können Zwischenlagen aus PTFE zwischen der Rektifiziersäule und den Schellen vorgesehen sein. Sie weisen U-förmige Verbindungselemente auf, an denen die seilförmigen Elemente befestigt sind. Die Befestigung und der Austausch der seilförmigen Elemente ist so einfach vorzunehmen. Um im Betrieb der Anlage zwischen den Schellen und der Rektifiziersäule und/oder dem Wärmetauscher eine Veränderung der Abmessungen der Rektifiziersäule und/oder des Wärmetauschers zu ermöglichen, bestehen die Schellen aus einem Werkstoff, der einen geringeren Wärmeausdehnugswert aufweist, als der Werkstoff der Rektifiziersäule und/oder des Wärmetauschers. Der Werkstoff der Schellen ist Edelstahl, der Werkstoff der Rektifiziersäule ist Aluminium. Hierbei schrumpft der Werksoff der Rektifiziersäule bei Betriebstemperaturen von ca, -170° C stärker als der Werkstoff der Schellen, was eine Veränderung der Abmessungen der Rektifiziersäule, inbesondere in der Länge, erlaubt. Bei Umgebungstemperatur wirken die seilförmigen Elemente als Transportsicherungselemente, die einen Transport der cold box in der Horizontalen erlauben, ohne daß die Rektifiziersäule und/oder der Wärmetauscher einer wesentlichen Biegebeanspruchung unterliegen. Durch die Erfindung kann die cold box beim Hersteller vollständig zusammengebaut und in horizontaler Lage zum Betreiber der Anlage bei Umgebungstemperatur transportiert und ohne Demontage von Teilen der Anlage betrieben werden.Ropes, chains, tie rods and understood the same, the at least the rectification column in the insulating jacket tense. The rope-shaped elements are at one end with the Rectification column and / or the heat exchanger connected via clamps that the Rectification column and / or the heat exchanger ring-shaped on its circumference surrounded to absorb the tensile forces occurring during the bracing. The Clamps are on the taking into account the usual tolerances Rectification column; if necessary, intermediate layers of PTFE between the rectification column and the clamps. They have U-shaped shapes Connecting elements on which the rope-shaped elements are attached. The Attaching and replacing the rope-shaped elements is so easy make. In order to operate the system between the clamps and the Rectification column and / or the heat exchanger a change of Dimensions of the rectification column and / or the heat exchanger allow, the clamps are made of a material that is less Has thermal expansion value than the material of the rectification column and / or of the heat exchanger. The material of the clamps is stainless steel, the material of Rectification column is aluminum. Here, the rectifier column's material shrinks at operating temperatures of approx. -170 ° C stronger than the material of the clamps, what a change in the dimensions of the rectification column, especially in the Length, allowed. At ambient temperature, the rope-shaped elements act as Transport securing elements that transport the cold box in the Allow horizontal lines without the rectification column and / or the Heat exchangers are subject to significant bending stress. Through the Invention, the cold box can be fully assembled and in the manufacturer horizontal position to the operator of the system at ambient temperature transported and operated without dismantling parts of the system.

Im Betrieb der Anlage nehmen die seilförmigen Elemente die Wärmeausdehnung von Isoliermantel und Rektifiziersäule und/oder Wärmetauscher auf, die aufgrund der unterschiedlichen Temperaturen der Anlagenteile bei den verschiedenen Betriebszuständen (im Betrieb/außer Betrieb) vorhanden sind.When the system is in operation, the rope-shaped elements absorb the thermal expansion of insulating jacket and rectification column and / or heat exchanger due to the different temperatures of the system parts at the different Operating states (in operation / out of operation) are present.

Durch die Seilverspannung ist neben einer einfacheren Montage zum Beispiel der Rektifiziersäule, eine Verbesserung der Wärmebilanz der Anlage erzielbar, da die seilförmigen Elemente nur eine geringe Wärmeleitung zwischen der Rektifiziersäule bzw. dem Wärmetauscher und dem Isoliermantel zulassen. Jedes seilförmige Element bestehet aus einem Seil, dessen Enden als Augenterminals ausgebildet sind, die in Terminals befestigt sind. Über mit dem isoliermantel verbundene Gewindestangen und eine Links-/Rechtsmutter (Mutter mit einem Links- und Rechtsgewinde) tragendes Verstellelement, in der die U-förmigen Terminals eingeschraubt sind, kann jedes seilförmige Element in seiner Länge verstellt werden. Andere Ausbildungen der Seilenden, zum Beispiel als Preßhülsen, Seilklammern, sowie andere Ein- oder Verstellmöglichkeiten, wie z.B. Exzenterhebel, werden durch die Erfindung mitumfasst und beschränken den Gegenstand der Erfindung nicht.
Hinzu kommt, daß durch die Verspannung der Anlagenteile im Isolationsraum das Gesamtgewicht der Anlage reduziert und der Berechnungsaufwand bezüglich der Ausdehnung der Anlagenteile verringert werden kann.In addition to a simpler assembly, for example the rectification column, the rope tensioning can improve the thermal balance of the system, since the rope-shaped elements only permit a low level of heat conduction between the rectification column or the heat exchanger and the insulating jacket. Each rope-shaped element consists of a rope, the ends of which are designed as eye terminals, which are fastened in terminals. Each cable-shaped element can be adjusted in length using threaded rods connected to the insulating jacket and a left / right nut (nut with a left and right hand thread) in which the U-shaped terminals are screwed. Other designs of the rope ends, for example as compression sleeves, rope clips, as well as other adjustment or adjustment options, such as eccentric levers, are included in the invention and do not limit the subject matter of the invention.
In addition, the bracing of the system parts in the insulation space reduces the overall weight of the system and the calculation effort with regard to the expansion of the system parts can be reduced.

Vorteilhaft werden nur die senkrecht zur Längsrichtung der Rektifiziersäule auftretenden Kräfte von Lagern aufgenommen, die an dem Isoliermantel befestigt sind. Nur die Lager lassen eine Wärmeleitung über den Isoliermantel zu. Um diese Wärmeleitung zu minimieren sind die Lager über Isolierwerkstoffe, wie glasfaserverstärktem Kunststoff(GFK)
zwischen dem Lager und der Innenfläche des Isoliermantels als Zwischenlagen angeordnet. Vorzugsweise wird der Isolationsraum mit Isolierwerkstoff, z. B. "Perlite", mit einer Dichte zwischen 40 bis 80 kg/m3, ausgefüllt.Advantageously, only the forces occurring perpendicular to the longitudinal direction of the rectification column are absorbed by bearings which are fastened to the insulating jacket. Only the bearings allow heat conduction through the insulating jacket. To minimize this heat conduction, the bearings are made of insulating materials such as glass fiber reinforced plastic (GRP)
arranged between the bearing and the inner surface of the insulating jacket as intermediate layers. Preferably, the isolation room with insulating material, for. B. "Perlite", filled with a density between 40 to 80 kg / m 3 .

im Isolationsraum ist vorteilhaft auch der Wärmetauscher angeordnet, in dem die Zerlegungsluft gegen Produktströme abgekühlt wird. Eine optimierte Wärmebilanz des Wärmetauschers läßt sich innerhalb des Isolationsraumes dadurch erzielen, daß der Wärmetauscher mit der Seite, in die die Zerlegungsluft ein- und die Produktströme austreten und die auf einem Temperatumiveau von ca. plus 10°C liegt, dem Isoliermantel zugeneigt und damit in unmittelbarer Nähe des wärmeren Isoliermantels angeordnet ist, während der Zerlegungsluftaus- und der Produktstromeintritt in der Nähe der Rektifiziersäule angeordnet ist, so daß die auf einem Temperaturniveau von ca. minus 170°C liegende Seite des Wämetauschers der auf etwa gleichem oder ähnlichem Temperaturniveau liegenden Rektifiziersäule zugeneigt ist. Durch diese die Temperaturgradienten des Wärmetauschers berücksichtigende Anordnung bezüglich der Temperaturverteilung in dem zumindest pulverisolierten Isolationsraum, ist die Wärmebilanz der Anlage durch die Isolierung und der Anordnung der Anlagenteile und Rektifiziersäule wesentlich optimiert, so daß die Ausdehnung der Anlagenteile reduziert ist. Dabei ist die Fixierung des Wärmetauschers unter einem Winkel mittels der vorstehen beschrieben seilförmigen Elemente besonders einfach zu erzielen.in the isolation room, the heat exchanger is advantageously arranged in which the Decomposition air is cooled against product flows. An optimized heat balance of the heat exchanger can be achieved within the insulation space by that the heat exchanger with the side into which the separation air enters and the Product flows emerge at a temperature level of approximately plus 10 ° C is inclined towards the insulating jacket and thus in the immediate vicinity of the warmer Isoliermantels is arranged during the decomposition air and the Product flow inlet is arranged near the rectification column, so that the side of the. lying at a temperature level of approx Heat exchanger at approximately the same or similar temperature level lying rectification column is inclined. Through this the temperature gradient of the heat exchanger taking into account the arrangement Temperature distribution in the at least powder-insulated insulation room is Thermal balance of the system through the insulation and the arrangement of the Plant parts and rectification column significantly optimized so that the expansion the system parts is reduced. The heat exchanger is fixed below an angle by means of the rope-shaped elements described above particularly easy to achieve.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is schematic in the drawing shown and is described in more detail below.

Es zeigen:

Figur 1
eine schematische Ausführungsform der erfindungsgemäßen Anlage zur Gewinnung von Stickstoff;
Figur 2
ein Ausführungsbeispiel für die Seilverspannung der Rektifiziersäule und des Wärmetauschers,
Show it:
Figure 1
a schematic embodiment of the plant for the production of nitrogen;
Figure 2
an embodiment of the rope bracing of the rectification column and the heat exchanger,

Die nur für die Erfindung wesentlichen Teile der Anlage zur Tieftemperaturzerlegung von Luft sind schematisch in Figur 1 dargestellt. Die Anlage besteht im wesentlichen aus einem Flüssiggasbehälter 10, einer Rektifiziersäule 15 mit Kopfkondensator 16 und einem Wärmetauscher 17. Die Abbildung ist nicht maßstabsgetreu, eine Rektifiziersäule 15 ist im Verhältnis zum Flüssiggasbehälter 10 in der Regel wesentlich höher als die dargestellte. Der Flüssiggasbehälter 10 für das Flüssiggas 11 besteht in der üblichen Weise aus einem Innenbehälter 12 und einem Außenbehälter 13, deren Zwischenraum 14 pulver-vakuumisoliert ist. Rektifiziersäule 15 mit Kopfkondensator 16 und Wärmetauscher 17 sind von einem Isoliermantel 18 umgeben. Der Isoliermantel besteht aus unlegiertem Baustahl und umschließt Rektifiziersäule 15 mit Kopfkondensator 16 und Wärmetauscher 17. Der von dem Isoliermantel 18 umgebene Isolationsraum 23 ist mit Isoliermittel, z. B. Perlite, ausgefüllt. Die Perlite füllen alle Hohlräume des Isolationsraumes 23 aus und umgeben die Rektifiziersäule 15 mit dem Kopfkondensator 16, den Wärmetauscher 17 und alle im Isolationsraum 23 angeordneten weiteren Bauteile, wie Rohrleitungen, Regelarmaturen und dergleichen.The parts of the system essential to the invention Low temperature decomposition of air is shown schematically in Figure 1. The System essentially consists of a liquid gas container 10, one Rectification column 15 with top condenser 16 and a heat exchanger 17. Die Image is not to scale, a rectification column 15 is in relation to Liquid gas container 10 generally much higher than that shown. The LPG container 10 for the LPG 11 is made in the usual way an inner container 12 and an outer container 13, the space between them 14 is powder-vacuum insulated. Rectification column 15 with top capacitor 16 and Heat exchangers 17 are surrounded by an insulating jacket 18. The insulating jacket consists of unalloyed structural steel and encloses rectification column 15 with Top condenser 16 and heat exchanger 17. The from the insulating jacket 18th Isolation space 23 is surrounded with insulation, such. B. Perlite. The Perlite fill all cavities of the isolation space 23 and surround them Rectification column 15 with the top condenser 16, the heat exchanger 17 and all further components, such as pipes, arranged in the insulation space 23, Control fittings and the like.

In dem Isolationsraum 23 steht die Rektifiziersäule 15 auf Lagern 24, die als Füße ausgebildet und mit dem Isoliermantel 18 verbunden sind.Die Lager 24 nehmen die Gewichtskräfte der Rektifiziersäule auf. Über ihre Längserstreckung ist die Rektifiziersäule mit seilförmigen Elementen 20, 21, 22, 25, 26 seitlich verspannt. Seilförmige Elemente können alle Elemente, wie rostfreie Edelstahlseile, Ketten, Zugstangen und dergleichen sein, wenn sie zur Verspannung der Rektifiziersäule 15 geeignet sind. Die Rektifiziersäule wird mindestens nach drei Seiten (120°) mit in ihrer Länge über Verstellelemente 60, 61, 66 einstellbaren Seilen verspannt. Die Verstellelemente 60, 61, 66 bestehen jeweils aus einer mit dem Isoliermantel 18 verbundenen Gewindestange 62, die in eine Mutter 63 mit Links-/ Rechtsgewinde geschraubt ist. Von der anderen Seite ist ein U-förmiges Terminal 64 mittels einer daran befestigten Gewindestange in die Mutter 63 geschraubt. Beim Drehen der Mutter 63 bewegen sich die Gewindestangen aufeinander zu oder voneinander weg. Das in dem Terminal 64 gelagerte und befestigte seilförmige Element 26 wird entsprechend in Richtung des Isoliermantels 18 gezogen oder oder zur Rektifiziersäule hin entspannt. Die seilförmigen Elemente 20, 21, 22, 25, 26 sind auf der zur Rektifiziersäule 15 weisende Seite in stationär angeordneten Terminals 65 gelagert. Die verstellbaren und stationären Terminals 64, 65 bilden zusammen mit den in Augenbolzen 67, 68 endenden Seilenden Gelenke. Die stationären Terminals 65 sind an Schellen 19, 51 befestigt, die die Rektifiziersäule 15 an ihrem Umfang ringförmig umfassen. Die Schellen 19, 51 mit den seilförmigen Elemente 20, 21, 22, 25, 26 umgeben die Rektifiziersäule 15 benachbart zu dem dem Lager 24 gegenüberliegenden Ende. Die Schellen bestehen aus einem Wekstoff, beispielsweise Edelstahl, der einen geringeren Wärmeausdehnungswert aufweist, als der Werkstoff, beispielsweise Aluminium, der Rektifiziersäule. Im Betrieb der Anlage zur Tieftemperaturzerlegung von Luft stellt sich aufgrund der verschiedenen Wärmeausdehnungswerte der Werkstoffe bei den tiefen Betriebstemperaturen ein Freiraum zwischen den Schellen 19, 51 und der Rektifiziersäule 15 ein, der eine Veränderung der Abmessung, insbesondere eine Veränderung der Länge der Rektifiziersäule, erlaubt.In the isolation room 23, the rectification column 15 stands on bearings 24, which act as feet formed and connected to the insulating jacket 18. Take the bearings 24 the weight of the rectification column. About its length is the Rectification column with rope-shaped elements 20, 21, 22, 25, 26 braced laterally. Rope-shaped elements can all elements, such as stainless steel ropes, chains, Tension rods and the like when used to brace the rectification column 15 are suitable. The rectification column is at least on three sides (120 °) tensioned in its length by means of adjusting elements 60, 61, 66. The adjusting elements 60, 61, 66 each consist of one with the insulating jacket 18 connected threaded rod 62, which in a nut 63 with left / Right-hand thread is screwed. From the other side is a U-shaped terminal 64 screwed into the nut 63 by means of a threaded rod attached to it. When the nut 63 is turned, the threaded rods move towards one another or away from each other. The one stored and fastened in the terminal 64 rope-shaped element 26 is correspondingly in the direction of the insulating jacket 18th pulled or or relaxed towards the rectification column. The rope-shaped elements 20, 21, 22, 25, 26 are stationary on the side facing the rectification column 15 arranged terminals 65 stored. The adjustable and stationary terminals 64, 65 together with the rope ends ending in eye bolts 67, 68 Joints. The stationary terminals 65 are attached to clamps 19, 51, which the Rectification column 15 embrace annularly on its circumference. The clamps 19, 51 with the rectifying column 15 surrounds the rope-shaped elements 20, 21, 22, 25, 26 adjacent to the end opposite the bearing 24. The bells consist of a material, for example stainless steel, which is a lesser Has thermal expansion value than the material, for example aluminum, the rectification column. In operation of the plant for the low-temperature separation of air arises due to the different thermal expansion values of the materials at low operating temperatures there is a free space between the clamps 19, 51 and rectifying column 15, which is a change in dimension, in particular, a change in the length of the rectification column allowed.

Vorzugsweise ist in dem Isolationsraum 23 der Wärmetauscher 17 angeordnet, dem über Leitung 28 verdichtete und gereinigte Luft zugeführt wird. Die kalte Luft wird in den unteren Bereich der Rektifiziersäule 15 eingeblasen.The heat exchanger 17 is preferably arranged in the insulation space 23, to which compressed and purified air is supplied via line 28. The cold air is blown into the lower region of the rectification column 15.

Die Rektifiziersäule 15 wird unter einem Druck von 4,5 bis 12 bar, vorzugsweise etwa 6 bar betrieben. Sie ist in dem Ausführungsbeispiel mit zwei Abschnitten 29, 30 von geordneten Packungen oder Siebböden ausgestattet. Oberhalb der Packungsabschnitte 29, 30 ist je ein Flüssigkeitssammler und Verteiler 31, 32 vorgesehen. The rectification column 15 is preferably under a pressure of 4.5 to 12 bar operated about 6 bar. It is in the embodiment with two sections 29, 30 equipped by orderly packs or sieve trays. Above the Pack sections 29, 30 are each a liquid collector and distributor 31, 32 intended.

Über eine Sauerstoffleitung 33 kann sauerstoffangereicherte Sumpfflüssigkeit entnommen werden. Eine Stickstoffleitung 34 führt gasförmigen Stickstoff als Produkt durch den Wärmetauscher 17 ab. Im oberen Bereich der Rektifiziersäule 15 mündet außerdem eine erste Speiseleitung 35, und zwar direkt in den oberen Flüssigkeitssammler 31. Sie dient zur Zu- und Abfuhr von Flüssigstickstoff und verbindet die Innenräume von Rektifiziersäule 15 und Stickstofftank 10.An oxygen-enriched sump liquid can be supplied via an oxygen line 33 be removed. A nitrogen line 34 carries gaseous nitrogen as Product through the heat exchanger 17. In the upper area of the rectification column 15 also opens a first feed line 35, directly into the upper Liquid collector 31. It serves for the supply and discharge of liquid nitrogen and connects the interior of rectification column 15 and nitrogen tank 10.

Ein Kopfkondensator 16 dient zur Verflüssigung von Stickstoff am Kopf der Rektifiziersäule 15. Die in der Zeichnung angedeuteten Passagen sind zum Innenraum der Rektifiziersäule hin offen und bilden somit die Stickstoffpassagen. Im Außenraum der Passagen steht sauerstoffangereicherte Flüssigkeit an, die über die Sauerstoffleitung 33 herangeführt wird. Sie verdampft in direkten Wärmetausch mit kondensierendem Stickstoff. Die verdampfte Fraktion wird über eine Sauerstoffproduktleitung 36 abgeführt und im Wärmetauscher 17 gegen Zerlegungsluft 28 angewärmt.A top condenser 16 serves to liquefy nitrogen at the top of the Rectification column 15. The passages indicated in the drawing are for Interior of the rectification column open and thus form the nitrogen passages. Oxygen-enriched liquid is present in the exterior of the passages is brought up via the oxygen line 33. It evaporates in direct Heat exchange with condensing nitrogen. The evaporated fraction is over an oxygen product line 36 is removed and in the heat exchanger 17 against Decomposition air 28 warmed.

Der Wärmetauscher 17 ist mit zwei Tragkonsolen 37 an dem Isoliermantel 18 befestigt. Die Tragkonsolen sind dem warmen Ende (+ 10°C) des Wärmetauschers 17 zugeordnet und tragen die senkrechten Lasten von diesem. Dabei ist der Wärmetauscher 17 so im Isolationsraum angeordnet, daß der Sauerstoffprodukteingang 38 vom Isoliermantel weiter entfernt ist, als der Sauerstoffproduktausgang 39. Dadurch daß der Wärmetauscher 17 unter einem Winkel 70 zwischen 3 und 10 Grad, vorzugsweise unter einem Winkel von 5 Grad mit seinem kalten Ende (ca. - 170°C) zur Rektifiziersäule hin geneigt angeordnet ist, wird der Kältebedarf reduziert, da das warme Ende dem wärmeren Isoliermantel 18 und das kalte Ende des Wärmetauschers der Rektifiziersäule zugeordnet ist. Die Befestigung und Ausrichtung des kalten Endes des Wärmetauschers 17 erfolgt über seilförmige Elemente 40, 41, 46, 47, die als Seilverspannung ausgebildet sind. Die seilförmigen Elemente 40, 41, 46, 47 sind entsprechend den im Zusammenhang mit der Seilverspannung der Rektifiziersäule beschriebenen seilförmigen Elementen ausgebildet. Die Seile 40, 41, 46, 47 enden in Augenbolzen 67, 68 die in U-förmigen verstellbaren und stationären Terminals 64, 65 gelagert sind. Die seilförmigen Elemente 46, 47 und 40, 41 verlaufen über Kreuz jeweils unter einem Winkel 71 von 45° zur Längsachse 72 des Wärmetauschers 17.The heat exchanger 17 has two support brackets 37 on the insulating jacket 18 attached. The support brackets are the warm end (+ 10 ° C) of the Heat exchanger 17 assigned and bear the vertical loads of this. The heat exchanger 17 is arranged in the isolation room so that the Oxygen product inlet 38 is further away from the insulating jacket than that Oxygen product outlet 39. Characterized in that the heat exchanger 17 under one Angle 70 between 3 and 10 degrees, preferably at an angle of 5 degrees with its cold end (approx. - 170 ° C) inclined towards the rectification column the need for cooling is reduced since the warm end is the warmer Insulating jacket 18 and the cold end of the heat exchanger of the rectification column assigned. The attachment and orientation of the cold end of the Heat exchanger 17 takes place via rope-shaped elements 40, 41, 46, 47, which as Rope bracing are formed. The rope-shaped elements 40, 41, 46, 47 are corresponding to those in connection with the rope tensioning of the Rectification column described rope-shaped elements. The ropes 40, 41, 46, 47 end in eyebolts 67, 68 which are adjustable in U-shaped and stationary terminals 64, 65 are stored. The rope-shaped elements 46, 47 and 40, 41 cross each other at an angle 71 of 45 ° to Longitudinal axis 72 of the heat exchanger 17.

Die seilförmigen Elemente 40, 41, 46, 47 sind an dem Wärmetauscher 17 mittels Schellen 50 befestigt.The rope-shaped elements 40, 41, 46, 47 are on the heat exchanger 17 by means of Clamps 50 attached.

Der Füllstand des Säulensumpfes der Rektifiziersäule wird mittels eines Ventiles 42 gesteuert, welches in der Sauerstoffleitung 33 angeordnet ist. Ventil 42 ist innerhalb des Isolationsraumes 23 angeordnet und pulver-isoliert. Über ein ebenfalls pulverisoliertes Abgangsstück 43 ist die Stelleinrichtung 44, beispielsweise eine Regelventilspindel, durch den Isoliermantel 18 nach außen geführt und mit einem Antrieb 45 so verbunden, daß das Ventil von außen einstellbar ist.The fill level of the column sump of the rectification column is checked by means of a valve 42 controlled, which is arranged in the oxygen line 33. Valve 42 is arranged within the isolation space 23 and powder-insulated. About one the control device 44 is also a powder-insulated outlet piece 43, for example, a control valve spindle, through the insulating jacket 18 to the outside guided and connected to a drive 45 so that the valve from the outside is adjustable.

Claims (13)

  1. Installation for the low-temperature fractionation of air, having at least one rectification column, which is connected to an air line for supplying fractionation air, to a nitrogen line for extracting a nitrogen fraction, and to an oxygen line for extracting an oxygen fraction, and which is surrounded by at least one insulating jacket which delimits an insulation chamber, through which the lines are guided to the rectification column and to which the rectification column is connected, characterized in that at least the rectification column (15) is held in the insulation chamber (23) by means of cable-like elements (20, 21, 22, 25, 26, 40, 41) in such a way that it is arranged in a predetermined position.
  2. Installation according to Claim 1, characterized in that the rectification column (15) has a top condenser (16) which is arranged in the insulation chamber (23) and on the outlet side is connected to a heat exchanger (17) via an oxygen product line (36) and on the inlet side is connected to the lower region of the rectification column (15) via an oxygen line (33) arranged in the insulation chamber (23).
  3. Installation according to Claim 1 or 2, characterized in that the heat exchanger (17) is arranged in the insulation chamber (23).
  4. Installation according to one of Claims 1 to 3, characterized in that the heat exchanger (17) is held in the insulation chamber (23) by means of cable-like elements (40, 41) in such a way that it is arranged in a predetermined position.
  5. Installation according to one of Claims 1 to 4, characterized in that the elements (20, 21, 22, 25, 26, 40, 41) are connected at one end to the rectification column and/or the heat exchanger via means (50, 51, 19), in particular clips, which surround the rectification column (15) and/or the heat exchanger on their circumference in the form of a ring and have connecting elements, to which the elements (25, 26; 40, 41) are secured.
  6. Installation according to one of Claims 1 to 5, characterized in that the means (50, 51, 19) consist of a material which have a lower coefficient of thermal expansion than the material of the rectification column 15) and/or of the heat exchanger.
  7. Installation according to Claim 5 or 6, characterized in that, when the installation is operating, a free space is established between the means (50, 51, 19) and the rectification column 15 and/or the heat exchanger (17), allowing the dimensions of the rectification column (15) and/or of the heat exchanger (17) to change.
  8. Installation according to one of Claims 1 to 5, characterized in that the elements (20, 21, 22, 25, 26, 40, 41) are secured, by means of their other end, to the insulating jacket (18), and bearings (24, 37) which absorb the loads of the rectification column 15) and/or of the heat exchanger (17) are provided on the insulating jacket).
  9. Installation according to one of Claims 1 to 8, characterized in that the bearing (24) of the rectification column is provided on the side which faces towards the base, and the elements (20, 21, 22, 25, 26) are provided at least adjacent to the other end of the rectification column (15).
  10. Installation according to one of Claims 1 to 9, characterized in that the length of the elements 20, 21, 22, 25, 26; 40, 41) can be adjusted by means of adjustment elements (60, 61, 66).
  11. Installation according to one of Claims 1 to 10, characterized in that the heat exchanger (17) is arranged inclined at an angle (70) in the insulation chamber (23), so that the cold end of the heat exchanger is arranged in the vicinity of the rectification column (15) and the hot end is arranged in the vicinity of the insulating jacket (18).
  12. Installation according to one of Claims 1 to 11, characterized in that the heat exchanger (17) is arranged inclined at an angle of between 1 and 45° in the insulation chamber (23).
  13. Installation according to one of Claims 1 to 12, characterized in that the insulation chamber 23) is filled with insulating material, e.g. perlite.
EP98941421A 1997-08-28 1998-08-17 Low-temperature air separation installation Expired - Lifetime EP1015827B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19737520 1997-08-28
DE19737520A DE19737520A1 (en) 1997-08-28 1997-08-28 Plant for the low-temperature separation of air
PCT/EP1998/005182 WO1999011991A1 (en) 1997-08-28 1998-08-17 Low-temperature air separation installation

Publications (3)

Publication Number Publication Date
EP1015827A1 EP1015827A1 (en) 2000-07-05
EP1015827B1 true EP1015827B1 (en) 2002-11-13
EP1015827B2 EP1015827B2 (en) 2007-07-11

Family

ID=7840453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98941421A Expired - Lifetime EP1015827B2 (en) 1997-08-28 1998-08-17 Low-temperature air separation installation

Country Status (5)

Country Link
EP (1) EP1015827B2 (en)
AT (1) ATE227829T1 (en)
CZ (1) CZ294901B6 (en)
DE (2) DE19737520A1 (en)
WO (1) WO1999011991A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2805603B1 (en) * 2000-02-25 2002-05-31 Air Liquide INSTALLATION STRUCTURE, ESPECIALLY CRYOGENIC, COMPRISING ELEMENTS OF WHICH THE DIMENSIONAL VARIATIONS DUE TO CHANGES IN TEMPERATURE ARE SYNCHRONIZED
GB2398516A (en) * 2003-02-18 2004-08-25 Air Prod & Chem Distillation column with a surrounding insulating support structure
ATE326672T1 (en) * 2003-04-30 2006-06-15 Linde Ag COLUMN SYSTEM AND METHOD FOR PRODUCING IT
DE10319755A1 (en) * 2003-04-30 2004-11-18 Linde Ag Column system and method for its production
EP2030662A1 (en) * 2007-08-09 2009-03-04 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Support device for single distillation column within the insulated enclosure
EP3743662A4 (en) * 2018-01-26 2021-08-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Air separation unit by cryogenic distillation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB833613A (en) † 1958-01-13 1960-04-27 British Oxygen Res And Dev Ltd Thermally insulated storage vessels
FR2668256B1 (en) * 1990-10-18 1992-12-11 Air Liquide METHOD FOR ADJUSTING THE VERTICALITY OF AN ELEMENT ARRANGED IN A CLOSED ENCLOSURE AND ASSEMBLY FOR THE IMPLEMENTATION OF THIS PROCESS.
DE4135302A1 (en) * 1991-10-25 1993-04-29 Linde Ag DEVICE FOR LOW TEMPERATURE DISPOSAL OF AIR
JPH09137627A (en) † 1995-11-14 1997-05-27 Ishikawajima Harima Heavy Ind Co Ltd Preventive device against sliding of double-shell flat bottom cylindrical tank

Also Published As

Publication number Publication date
EP1015827B2 (en) 2007-07-11
DE59806294D1 (en) 2002-12-19
CZ294901B6 (en) 2005-04-13
ATE227829T1 (en) 2002-11-15
CZ2000570A3 (en) 2001-12-12
WO1999011991A1 (en) 1999-03-11
DE19737520A1 (en) 1999-03-04
EP1015827A1 (en) 2000-07-05

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