DE702246C - Device for breaking down a gas mixture with low boiling points - Google Patents

Device for breaking down a gas mixture with low boiling points

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Publication number
DE702246C
DE702246C DE1936F0081920 DEF0081920D DE702246C DE 702246 C DE702246 C DE 702246C DE 1936F0081920 DE1936F0081920 DE 1936F0081920 DE F0081920 D DEF0081920 D DE F0081920D DE 702246 C DE702246 C DE 702246C
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Prior art keywords
ethane
mixture
ethylene
column
additional
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DE1936F0081920
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German (de)
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Dr-Ing Victor Fischer
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VICTOR FISCHER DR ING
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VICTOR FISCHER DR ING
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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
    • F25J3/0228—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 characterised by the separated product stream
    • F25J3/0238—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 characterised by the separated product stream separation of CnHm with 2 carbon atoms or more
    • 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
    • F25J3/0204—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 characterised by the feed stream
    • F25J3/0219—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
    • 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
    • F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04363—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/044—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
    • F25J3/04872—Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.
    • F25J3/04884—Arrangement of reboiler-condensers
    • 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
    • F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column
    • 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
    • F25J2210/12—Refinery or petrochemical off-gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/62—Ethane or ethylene
    • 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
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/02—Internal refrigeration with liquid vaporising loop
    • 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
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/88—Quasi-closed internal refrigeration or heat pump cycle, if not otherwise provided

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Vorrichtung zum Zerlegen eines Gasgemisches mit tiefliegenden Siedepunkten Die möglichst vollständige Trennung von Gasgemischen mit tiefliegenden Siedepunkten in ihre Bestandteile ist in einem Einsäulenapparat nicht ohne weiteres möglich. Es wird daher z. B. die Trennung der Luft in Sauerstoff und Stickstoff in einem Zweisäulenapparat zweistufig durchgeführt.Device for breaking down a gas mixture with low boiling points The most complete possible separation of gas mixtures with low boiling points its constituent parts are not readily possible in a single-column apparatus. It is therefore z. B. the separation of air into oxygen and nitrogen in one Two-column apparatus carried out in two stages.

Zum Zerlegen der Luft oder eines Athan-Äthylen-Gemisches in Sauerstoff und Stickstoff bzw. Äthan und Äthylen von hoher Reinheit in einem Einsäulenapparat war es bekannt, den tiefersiedenden Bestandteil (Stickstoff bzw. Äthylen) als Hilfsstoff zur zusätzlichen Beheizung des Bades von dem höhersiedenden Bestandteil (Sauerstoff bzw. Äthan) zu benutzen.For breaking down air or an athan-ethylene mixture into oxygen and nitrogen or ethane and ethylene of high purity in a single column apparatus it was known to use the lower-boiling component (nitrogen or ethylene) as an auxiliary for additional heating of the bath from the higher-boiling component (oxygen or ethane).

Bei der Vorrichtung nach der Erfindung wird der Einsäulenapparat durch einen Kondensator .ergänzt. Dadurch wird die Verwendung des höhersiedenden Bestandteiles als Hilfsstoff ermöglicht. Als Beispiel diene ein Äthan-Äthylen-Gemisch. Da für eine möglichst vollständige Trennung der Bestandteile die Beheizung und Kühlung der Trennsäule lediglich durch das zu zerlegende Gemisch nicht genügt, wird eine dessen Zusammensetzung angepaßte Menge zusätzlichen Äthans zur zusätzlichen Heizung und Kühlung der Trennsäule benutzt. Das hierbei als Waschflüssigkeit in einem Kondensator niedergeschlagene Äthylen entsteht durch Verdampfung des gewonnenen und des zusätzlichen Äthans, wodurch eine Kraftersparnis gegenüber der Verwendung zusätzlichen Äthylens zur Heizung des Äthanbades erreicht wird, da dann nur das zusätzliche Äthylen als Waschflüssigkeit zur Verfügung steht. Es wird nämlich weniger zusätzliches Äthan gebraucht als zusätzliches Äthylen. Der Kraftverbrauch ist also für die Verdichtung des zusätzlichen Äthans geringer als zur Verdichtung des zusätzlichen Äthylens. Besteht z. B. das. Gemisch aus gleichen Teilen Äthan und Äthylen, so - wird auf i kg des zu zerlegenden Gemisches ungefähr 1,4 kg zusätzliches :@tliylen gebraucht. Hingegen nur 0,7 kg zusätzliches Äthan. Die geringere Verdichtungsarbeit für den zusätzlichen Hilfsstoff bedingt in letzterem Falle gegenüber dem ersteren eine Ersparnis von ungefähr 2o °`o an der gesamten für die Zerlegung benötigten Verdichtungsarbeit.In the device according to the invention, the single-column apparatus is complemented by a capacitor. This enables the higher-boiling component to be used as an auxiliary material. Take an ethane-ethylene mixture as an example. Since the heating and cooling of the separation column simply by the mixture to be separated is not sufficient for the most complete separation of the constituents possible, an amount of additional ethane adapted to its composition is used for additional heating and cooling of the separation column. The ethylene precipitated as washing liquid in a condenser is created by evaporation of the extracted and the additional ethane, which saves energy compared to using additional ethylene to heat the ethane bath, since only the additional ethylene is then available as washing liquid. This is because less additional ethane is needed than additional ethylene. The power consumption is therefore lower for the compression of the additional ethane than for the compression of the additional ethylene. Is there e.g. B. the. Mixture of equal parts of ethane and ethylene, so - about 1.4 kg of additional: @tliylen is needed for 1 kg of the mixture to be broken down. In contrast, only 0.7 kg of additional ethane. The lower compression work for the additional auxiliary means in the latter case compared to the former a saving of about 20 ° `o in the total compression work required for the decomposition.

In M ü 11 e r - P o u i 11 e t s »Lelirbuch'der Physik;< ist ein Verfahren bekanntgemacht, bei dem Heizung und Kühlung der Trennsäule nur durch den Kreislauf eines Hilfsstoffes erfolgt, während das zu zerlegende Gasgemisch, hier die Luft, der Trennsäule zugeführt wird, ohne daß es zur Heizung und Kühlung benutzt wird. Demgegenüber hat die Vorrichtung nach der Erfindung den Vorteil, daß bei ihr die Waschflüssigkeit durch Verdampfung des gewonnenen und des zirkulierenden Höhensiedenden entsteht. Da bei dem in M ü 11 e r - P o u i 11 e t s >:Lehrbuch der Physik« beschriebenen Verfahren nur der Hilfsstoff zur Bildung der Waschflüssigkeit zur Verfügung steht, wird der Kraftverbrauch ebenso wie beim Verfahren zur Verdichtung des Hilfsstoffes größer als bei der Vorrichtung nach der Erfindung.In M ü 11 e r - P o u i 11 e t s "Lelirbuch'der Physik;" is a Process made known in which heating and cooling of the separation column only by the An auxiliary material is circulated while the gas mixture to be broken down is here the air that is fed to the separation column without being used for heating and cooling will. In contrast, the device according to the invention has the advantage that with her the washing liquid by evaporation of the recovered and circulating high boilers arises. As with the one described in M ü 11 e r - P o u i 11 e t s>: Textbook of Physics « Process only the auxiliary substance for the formation of the washing liquid is available, is the power consumption as well as in the process of compressing the auxiliary material larger than in the device according to the invention.

Es war auch bekannt, den tiefersiedenden Bestandteil (Stickstoff) arbeit- und kälteleistend zu entspannen, um eine -zusätzliche Flüssigkeit (Sauerstoff) zu gewinnen, die dem Kondensator einer Einsäulenkolonne als Kühlflüssigkeit aufgegeben wird. Dieses Verfahren hat den Nachteil, daß nur der tiefersiedende Bestandteil rein gewonnen wird, da der Vermehrung der vom Kondensator in die Trennsäule strömenden Waschflüssigkeit keine Vermehrung der vom Boden der Trennsäule aufsteigenden Dämpfe gegenübersteht.It was also known to be the lower boiling component (nitrogen) to relax while doing work and cold in order to get an additional liquid (oxygen) to win, which gave up the condenser of a single column column as a cooling liquid will. This process has the disadvantage that only the lower-boiling component is obtained purely because of the increase in the amount flowing from the condenser into the separation column Washing liquid does not increase the vapors rising from the bottom of the separation column facing.

Bei der Vorrichtung nach der Erfindung wird in einer Einsäulenkolonne mit Kondensator der zugesetzte höhersiedende Bestandteil nicht nur als Kühlmittel, sondern auch als Heizmittel dem zu zerlegenden Gemisch zugeführt. Dies hat gegenüber dem Verfahren nach der französischen Patentschrift 367 85.1 den Vorteil, daß beide Bestandteile des Gemisches rein gewonnen werden, da der vermehrten Kühlflüssigkeit eine vermehrte Dampfbildung gegenübersteht. Ferner kann bei der Vorrichtung nach der Erfindung der tiefersiedende Bestandteil wie bei dem obigen Verfahren arbeit- und kälteleistend entspannt werden und z. B. zur Vorkühltnmg des zu zerlegenden Gemisches dienen, wodurch der Betriebsdruck für die Trennsäule vermindert wird.In the device according to the invention, in a single column column with a condenser, the added higher-boiling component not only as a coolant, but also supplied to the mixture to be broken down as a heating medium. This has opposite the method according to the French patent 367 85.1 the advantage that both Components of the mixture are obtained in pure form because of the increased cooling liquid is faced with an increased formation of steam. Furthermore, in the device according to of the invention, the lower-boiling component works as in the above process and be relaxed while cold and z. B. for the pre-cooling of the to be dismantled Serve mixture, whereby the operating pressure for the separation column is reduced.

Nach einem weiteren bekannten Verfahren wird dem zu zerlegenden Gemisch der höher-'siedende Bestandteil, z. B. Sauerstoff, bei der Luftzerlegung zugesetzt. Bei der Vorrichtung nach der Erfindung handelt es sich jedoch nicht um eine Anreicherung des zu zerlegenden Gemisches mit dem höhersiedenden Bestandteil. Diese Anreicherung hat den Nachteil, daß die zu zerlegende Menge des Gemisches durch den Hilfsstoff vermehrt und dadurch die Zerlegung entsprechend erschwert wird sowie daß dann der Hilfsstoff mit dem Gemisch auf dessen Enddruck verdichtet wird, der höher ist als der Enddruck des Höhersiedenden, wenn dieses einen Kreislauf vollführt.According to another known method, the mixture to be broken down the higher-boiling component, e.g. B. Oxygen, added in the air separation. However, the device according to the invention is not an enrichment of the mixture to be broken down with the higher-boiling component. This enrichment has the disadvantage that the amount of the mixture to be broken down by the excipient increased and thus the decomposition is made more difficult, and then the Auxiliary substance is compressed with the mixture to the final pressure of which is higher than the final pressure of the higher boiling point when it completes a cycle.

Die Abbildung zeigt ein Ausführungsbeispiel der neuen Vorrichtung für den Fall der Trennung eines Äthan-Äthylen-Gemisches. Das auf 8 at verdichtete und zu zerlegende Äthan-Äthylen-Gemisch tritt bei a in den Gegenstromkühler G ein, durchströmt diesen und kommt bei b in das Bad B von flüssigem Äthan am Boden der Trennsäule T. Hier verflüssigt sich das Äthan-Äthylen-Gemisch, während gleichzeitig eine entsprechende Menge Äthan aus dem Bade B verdampft und durch die Siebböden der Trennsäule T hochsteigt. Das verflüssigte Gemisch wird in c entspannt und rieselt über die Böden der Trennsäule T, den vom Bade B aufsteigenden Dämpfen entgegen, nach abwärts. Dabei wird das erstere immer äthanreicher, die letzteren werden immer äthylenreicher. Bei d wird dem Trennapparat zusätzliches, auf 3,5 at verdichtetes Äthan zugeführt. Dieses durchströmt den Gegenstromkühler G und tritt bei e in das Bad B ein, in dem es sich verflüssigt und dessen Verdampfung es verstärkt. Das verflüssigte Äthan wird bei f über dem Kondensator I( auf i at entspannt und bei h das dem Äthanbad bei g entnom= mene gewonnene Athan. Der Druck in der Trennsäule ist 3 at, so daß die Siedetemperatur des Äthylens höher wird als die des auf i at entspannten Äthans. Ein Teil der vom Kopf der Trennsäule T aufsteigenden Äthylendämpfe kondensiert sich in den vom kälteren flüssigen Äthan umspülten Rohren des Kondensators I(, um als Waschflüssigkeit über die Böden von T nach abwärts zu rieseln, während der dampfförmig gebliebene Teil als gewonnenes Äthylen den Kunden; Bator bei k verläßt. Dieses durchzieht den Gegenstromkühler G und tritt bei L aus ihm aus. Das über dem Kondensator verdampfende Äthan geht bei ra in den Gegenstromkühler 0 und verläßt ihn bei o. Aus dem abziehenden Gas wird bei p das zusätzliche Äthan von einem Kompressor abgesaugt, verdichtet und dem Trennapparat wieder zugeführt. Das bei L entnommene Äthylen kann vor Eintritt in den Gegenstromkühler G oder nach Verlassen desselben in einer'Expansionsmaschim entspannt werden.The figure shows an embodiment of the new device for the case of the separation of an ethane-ethylene mixture. The ethane-ethylene mixture, compressed to 8 at and to be broken down, enters the countercurrent cooler G at a, flows through it and at b comes into the bath B of liquid ethane at the bottom of the separation column T. Here the ethane-ethylene mixture liquefies , while at the same time a corresponding amount of ethane evaporates from the bath B and rises through the sieve trays of the separation column T. The liquefied mixture is relaxed in c and trickles downwards over the bottoms of the separation column T, counter to the vapors rising from bath B. The former becomes more and more rich in ethane, the latter becomes more and more rich in ethylene. At d, additional ethane, compressed to 3.5 at, is fed to the separator. This flows through the countercurrent cooler G and enters bath B at e, in which it liquefies and the evaporation of which it intensifies. The liquefied ethane is relaxed at f above the condenser I (to i at and at h the athane extracted from the ethane bath at g = mene. The pressure in the separating column is 3 at, so that the boiling temperature of the ethylene is higher than that of the at Part of the ethylene vapors rising from the top of the separating column T condenses in the pipes of the condenser I, which are surrounded by the colder liquid ethane, to trickle downwards as washing liquid over the bottoms of T, while the part remaining in vapor form as recovered Ethylene leaves the customer; Bator leaves the customer at k. This passes through the countercurrent cooler G and emerges from it at L. The ethane evaporating above the condenser goes into the countercurrent cooler 0 at ra and leaves it at o. The withdrawing gas becomes the additional one at p Ethane is sucked off by a compressor, compressed and fed back to the separating apparatus. The ethylene removed at L can be used before entering the countercurrent cooler G or after leaving be relaxed in an expansion machine.

Claims (1)

PATENTANSPRUCH Vorrichtung zum Zerlegen eines Gasgemisches mit tiefliegendem Siedepunkt in einer einstufigen Trennsäule unter Verwendung eines einen Kreislauf vollführenden Hilfsstoffes, der den Verdampfer der Trennsäule 'beheizt und nach erfolgter Entspannung den Kondensator der Trennsäule kühlt, dadurch gekennzeichnet, daß der Verdampfer durch das zu zerlegende Gasgemisch und durch im Kreislauf geführtes Höhersiedendes beheizt und der Kondensator durch das Höhersiedende des Kreislaufes und aus dem unteren Teil der Trennsäule abgezogenes Höhersiedendes gekühlt wird.PATENT CLAIM An apparatus for decomposing a gaseous mixture with low-boiling in a single-stage separation column using a cycling full leading auxiliary, which heats the evaporator of the separating column 'and after relaxation cools the condenser of the separation column, characterized in that the evaporator through the material to be separated gas mixture, and is heated by the higher boiling point conducted in the circuit and the condenser is cooled by the higher boiling point of the circuit and the higher boiling point drawn off from the lower part of the separation column.
DE1936F0081920 1936-10-23 1936-10-23 Device for breaking down a gas mixture with low boiling points Expired DE702246C (en)

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