DE3149847A1 - Process for removing hydrocarbons and other impurities from a gas - Google Patents

Process for removing hydrocarbons and other impurities from a gas

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Publication number
DE3149847A1
DE3149847A1 DE19813149847 DE3149847A DE3149847A1 DE 3149847 A1 DE3149847 A1 DE 3149847A1 DE 19813149847 DE19813149847 DE 19813149847 DE 3149847 A DE3149847 A DE 3149847A DE 3149847 A1 DE3149847 A1 DE 3149847A1
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Prior art keywords
gas
refrigerant
impurities
cleaned
cooled
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DE19813149847
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German (de)
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Gerhard Dipl.-Ing. 8000 München Frey
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Linde GmbH
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Linde GmbH
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Priority to DE19813149847 priority Critical patent/DE3149847A1/en
Publication of DE3149847A1 publication Critical patent/DE3149847A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/10—Vacuum distillation
    • B01D3/101—Recirculation of the fluid used as fluid working medium in a vacuum creating device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
    • B01D5/0021—Vortex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0027—Condensation of vapours; Recovering volatile solvents by condensation by direct contact between vapours or gases and the cooling medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
    • B01D5/0093—Removing and treatment of non condensable gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The invention relates to a process and equipment for removing hydrocarbons and other impurities from a gas. It is known to remove impurities from a mixture by cooling the mixture in the regenerated one of heat exchangers which can be switched over, until the impurities condense or freeze out on the heat exchanger walls. To enable the removal of hydrocarbons and other impurities from gases to be carried out inexpensively and without the use of the expensive change-over devices required for this purpose, it is proposed according to the invention that the gas to be purified is cooled by spraying in a refrigerant. The impurities then freeze and/or condense. They are then separated from the gas together with the refrigerant.

Description

Verfahren zur Entfernung von Kohlenwasserstoffen Process for removing hydrocarbons

und anderen Verunreinigungen aus einem Gas Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Entfernen von Kohlenwasserstoffen und anderen Verunreinigungen aus einem Gas. and other contaminants from a gas The invention relates to a method and apparatus for removing hydrocarbons and others Impurities from a gas.

Ein derartiges Verfahren ist in der deutschen Offenlegungsschrift 23 37 055 beschrieben. Zur Rückgewinnung von Kohlenwasserstoffen, die in einem Benzin-Luft-Gemisch enthalten sind, wird das Gemisch in dem regenerierten von zwei wechselbaren Wärmetauschern je nach der gerade vorliegenden Schaltphase soweit abgekühlt, daß die Kohlenwasserstoffe an den Wärmetauscherwänden auskondensieren bzw.Such a method is in the German Offenlegungsschrift 23 37 055. For the recovery of hydrocarbons in a gasoline-air mixture are contained, the mixture is regenerated by two exchangeable heat exchangers depending on the current switching phase, cooled down to such an extent that the hydrocarbons condense on the heat exchanger walls or

ausfrieren.freeze out.

Dabei hat sich gezeigt, daß insbesondere bei dem Abtauen von festgewordenem Benzol die Wärmetauscher sehr groß und zusätzlich durch die automatischen Umschalteinrichtungen sehr teuer werden. Die Wärmetauscher sind deshalb so groB, weil mit nur sehr geringen Wärmedurchgangswerten gerechnet werden kann.It has been shown that especially when defrosting solidified Benzene the heat exchangers very large and additionally through the automatic switching devices become very expensive. The reason why the heat exchangers are so large is that they only have very small Heat transfer values can be calculated.

Der Erfindung liegt daher die Aufgabe zugrunde ein Verfahren zu entwickeln, mit dem die Entfernung von Kohlenwasserstoffen und anderen Verunreinigungen aus Gasen preiswert und ohne Einsatz teurer Umschaltvorrichtungen durchgeführt werden kann.The invention is therefore based on the object of developing a method with which the removal of hydrocarbons and other contaminants Gases can be carried out inexpensively and without the use of expensive switching devices can.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das zu reinigende Gas durch Einsprühen eines Käliemittels gekühlt wird, wobei die Verunreinigungen gefrieren und/oder kondensieren, und anschließend die Verunreinigungen zusammen mit dem Kältemittel vom Gas abgetrennt werden.This object is achieved according to the invention in that the to be cleaned Gas is cooled by spraying a cooling agent, removing the impurities freeze and / or condense, and then the impurities together separated from the gas with the refrigerant.

Das zu reinigende Gas wird demgemäß durch direkten Wärmekontakt abgekühlt, wodurch ein wesentlich besserer Wärmeübergang als bei einem indirekten Wärmetausch erreicht wird. Das Kältemittel wird in fein verteilter Form und in einer Menge in das verunreinigte Gas eingesprüht, die ausreicht, alle Verunreinigungen zu verflüssigen oder auszufrieren. Die dann in verschiedenen Aggregatszuständen vorliegenden Bestandteile des ungereinigten Gases, nämlich das Gas und die nunmehr festen bzw. flüssigen Verunreinigungen, sind leicht zu trennen. Bei genügend tiefen Temperaturen des Kältemittels liegen die Verunreinigungen und gegebenenfalls auch Wasser in Form von festen Niederschlägen in fein verteilter Form vor, die gepumpt werden können.The gas to be cleaned is accordingly cooled by direct thermal contact, which results in a much better heat transfer than with an indirect heat exchange is achieved. The refrigerant comes in finely divided form and in an amount in the contaminated gas is injected, which is sufficient to liquefy all the contaminants or freeze out. The constituents then present in different states of aggregation of the unpurified gas, namely the gas and the now solid or liquid impurities, are easy to separate. Lie at sufficiently low temperatures of the refrigerant the impurities and possibly also water in the form of solid precipitates in finely divided form that can be pumped.

Daher gestaltet sich die Entfernung dieser Verunreinigungen besonders einfach.Therefore, the removal of these impurities is special simple.

Da sich die ausfrierenden Verunreinigungen nicht an den Flächen eines Wärmetauschers absetzen, erübrigt sich ein Abtauen solcher Flächen. Zu dem kann auf den Einsatz von Wärmetauschern zum Ausfrieren von Verunreinigungen sowie die damit notwendige Umschalteinrichtung vollständig verzichtet werden. Neben den Investitionskosten erspart man sich auch die anfallenden Wartungskosten. Die Reinigung des Gases ist praktisch vollkommen, da die Temperatur und die Verteilung des Kältemittels leicht auf geeignete Werte gebracht werden kann. Die je nach den vorliegenden Betriebstemperaturen festwerdenden Kohlenwasserstoffe werden also einwandfrei abgeschieden. Liegt beispielsweise die Betriebstemperatur unter dem Gefrierpunkt von Wasser, so liegen die festwerdenden Kohlenwasserstoffe und das Wasser in Form von Eis in feinst verteilter Form vor und sind pumpbar. In einer besonders wirtschaftlichen Atso gestaltung des Erfindungsgedankens wird das Kältemittel mit Vorteil im Kreislauf geführt. Hierbei werden die Verunreinigungen aus dem Kältemittel abgetrennt und wird das gereinigte Kältemittel gekühlt und erneut in das zu reinigende Gas eingesprüht. Zwar muß das Kältemittel nach wie vor durch Abkühlung in einer Kälteanlage auf die zur-Abtrennung der Verunreinigungen erforderliche tiefe Temperatur gebracht werden, jedoch muß beim vorgeschlagenen Verfahren nur das quasi als Waschflüssigkeit dienende Kältemittel gekühlt werden. Als Kältemittel können erfindungsgemäß verschiedene Stoffe dienen: Einerseits kann als Kältemittel ein von den abzutrennenden Verunreinigungen verschiedener Stoff, z.B. Toluol zur Abtrennung von Benzol, eingesetzt werden. Andererseits ist es aber auch möglich, als Kältemittel die Verunreinigungen, insbesondere Kohlenwasserstoffe einzusetzen. In beiden Fällen werden zunächst die ausgefrorenen Verunreinigungen von den in flüssiger Form vorliegenden Verunreinigungen und dem Kältemittel abgetrennt. In der ersten Variante werden dann die in flüssiger Form im Kältemittel gelöst vorliegenden Verunreinigungen von diesem, vorteilhafterweise durch-Destillation, abgetrennt.Since the freezing out impurities are not on the surfaces of a When placing the heat exchanger down, there is no need to defrost such surfaces. To that can on the use of heat exchangers to freeze out impurities as well as the so that the necessary switching device can be completely dispensed with. In addition to the investment costs you also save the maintenance costs. The purification of the gas is practically perfect as the temperature and distribution of the refrigerant are easy can be brought to suitable values. Depending on the operating temperatures Solidifying hydrocarbons are therefore separated out properly. For example the operating temperature is below the freezing point of water, so are the solidifying Hydrocarbons and the water in the form of ice in finely divided form Form and are pumpable. In a particularly economical design of the According to the invention, the refrigerant is advantageously circulated. Here the impurities are separated from the refrigerant and the cleaned one Refrigerant cooled and sprayed again into the gas to be cleaned. It must be Refrigerant continues to be separated by cooling in a refrigeration system the required low temperature of the impurities must be brought, however in the proposed method only the refrigerant, which is used as a washing liquid, as it were be cooled. According to the invention, various substances can serve as refrigerants: On the one hand, the refrigerant can be a different one from the impurities to be separated Substance, e.g. toluene for the separation of benzene, can be used. On the other hand is But it is also possible to use the impurities, especially hydrocarbons, as the refrigerant to use. In both cases, the frozen impurities are the first separated from the impurities present in liquid form and the refrigerant. In the first variant, those are then present dissolved in liquid form in the refrigerant Impurities are separated off from this, advantageously by distillation.

Mit besonderem Vorteil ist es jedoch in der zweiten Variante lediglich erforderlich, die festen Verunreinigungen beispielsweise durch ein geeignetes Sieb abzutrennen. Da die kondensierten Verunreinigungen in dieser Variante selbst als Kältemittel dienen, ist ein weiterer Trennprozeß nicht erforderlich. Die auskondensierten Verunreinigungen (d.h.However, it is only particularly advantageous in the second variant required, the solid impurities, for example through a suitable sieve to separate. Since the condensed impurities in this variant themselves as Serve refrigerant, a further separation process is not required. The condensed Impurities (i.e.

das Kältemittel) sind lediglich abzukühlen und können anschließend unmittelbar in das zu reinigende Gas eingesprüht werden. Um die umlaufende Kältemittelmenge konstant zu halten, muß in dieser Variante lediglich der überschüs- sige Teil des Kältemittels, das sind die pro Kältemittelkreislauf aus dem Gas abgeschiedenen, verflüssigten Verunreinigungen aus dem Kältemittelkreislauf abgeführt werden.the refrigerant) only need to be cooled down and can then be sprayed directly into the gas to be cleaned. About the amount of refrigerant in circulation to keep constant, in this variant only the excess sige Part of the refrigerant, i.e. those separated from the gas per refrigerant circuit, liquefied contaminants are removed from the refrigerant circuit.

Auf diese Weise gelingt es besonders einfach, Verunreinigungen aus dem Gas, z.B. Benzin oder Lösungsmittel aus der Luft abzutrennen und rückzugewinnen In einer besonders energiesparenden Variante des Erfindungsgedankens wird das gereinigte Gas, das eine unter Umgebungstemperatur liegende Temperatur besitzt, in Wärmetausch mit dem zu reinigenden Gas gebracht, wodurch dieses vorgekühlt und die Kälteexergie des gereinigten Gases genutzt wird.In this way it is particularly easy to remove impurities separating and recovering gas, e.g. gasoline or solvents, from the air In a particularly energy-saving variant of the inventive concept, the cleaned Gas that has a temperature below ambient temperature in heat exchange brought with the gas to be cleaned, whereby this is pre-cooled and the cold exergy of the purified gas is used.

Dieser Verfahrensschritt lohnt sich insbesondere dann, wenn wenige Verunreinigungen im Gas enthalten sind. In diesem Fall ist die Absorptionswärme gegenüber der fühlbaren Wärme klein, wodurch auch die Wärmetönung im Wärmetauscher (z.B.This process step is particularly worthwhile if only a few Impurities are contained in the gas. In this case it is the heat of absorption small compared to the sensible heat, which also causes the heat in the heat exchanger (e.g.

Venturi-Wäscher) gering gehalten ist und so mit geringen Temperaturdifferenzen wirtschaftlich gefahren werden kann.Venturi scrubber) is kept low and so with low temperature differences can be driven economically.

Das erfindungsgemäße Verfahren wird bevorzugt zur Reinigung von Luft beim Verladen von Kohlenwasserstoffen eingesetzt, ist jedoch nicht nur auf die Abtrennung von Kohlenwasserstoffen beschränkt. Es kann z.B-. auch bei Schwefelkohlenstoff oder anderen Nichtkohlenwasserstoffen bei Wahl entsprechender Kältemittel und Kältemitteltemperaturen ein guter Reinigungseffekt erzielt werden. Bei Reinigung von inerten Gasen besteht bei dem System die Möglichkeit, über einen Kompressor den Druck des Gases zu erhöhen und somit das tösungsvermögen des Kältemittels wesentlich zu erhöhen.The method according to the invention is preferred for purifying air Used in the loading of hydrocarbons, however, is not limited to separation limited by hydrocarbons. It can e.g. also with carbon disulfide or other non-hydrocarbons if the appropriate refrigerants and refrigerant temperatures are selected a good cleaning effect can be achieved. When cleaning inert gases exists with the system the possibility of increasing the pressure of the gas via a compressor and thus to significantly increase the solvency of the refrigerant.

Ein weiterer Vorteil des vorgeschlagenen Verfahrens ist, daß mit verhältnismäßig geringem Aufwand (ein Venturi-Wäscher kostet nur einen Bruchteil eines indirekten Wärmetauschers) eine geschlossene Kondensation erzielt werden kann. Entsprechende Aufwendungen, wie z.B. der Bau eines Strippers bei bekannten Benzin-Rückgewinnungsanlagen, können entfallen.Another advantage of the proposed method is that with relative little effort (a venturi scrubber costs only a fraction of an indirect one Heat exchanger) a closed condensation can be achieved. Appropriate Expenses, such as building a Strippers at known gasoline recovery plants, can be omitted.

Im folgenden soll anhand einer schematischen Skizze ein Ausführungsbeispiel geschildert werden.In the following, an exemplary embodiment is intended on the basis of a schematic sketch are portrayed.

Das zu reinigende Gas, z.B. mit Benzoldämpfen beladene Luft wird über eine Zufuhrleitung 7 in einen Venturi-Wäscher 2 eingeleitet, bei dem die Energie für die Strömung und Dispergierung des ebenfalls in den Venturi-Wäscher über eine Leitung 12 eingeleiteten Kältemittels durch das Gas aufgebracht wird. In direktem Wärmetausch mit dem Kältemittel wird das zu reinigende Gas auf eine geeignet tiefe Temperatur gekühlt. Dabei friert ein Teil der Verunreinigungen (Kohlenwasserstoffe mit höherem Gefrie-rpunkt als die Kältemitteltemperatur, Wasser) aus, während ein weiterer Teil kondensiert und im Kältemittel gelöst von diesem mittransportiertwird. Nachfolgend wird das Gas zusammen mit den ausgefrorenen bzw. kondensierten Verunreinigungen und dem Kältemittel in einen Abscheider, im Ausführungsbeispiel in einen Zyklonabscheider 3 eingeleitet.The gas to be cleaned, e.g. air laden with benzene vapors, is over a supply line 7 is introduced into a venturi scrubber 2, in which the energy for the flow and dispersion of the also into the venturi scrubber via a Line 12 introduced refrigerant is applied by the gas. In direct By exchanging heat with the refrigerant, the gas to be cleaned is reduced to a suitable depth Temperature cooled. Some of the impurities (hydrocarbons with a higher freezing point than the refrigerant temperature, water) while on another part is condensed and dissolved in the refrigerant is transported along with it. Subsequently, the gas is used together with the frozen or condensed impurities and the refrigerant in a separator, in the exemplary embodiment in a cyclone separator 3 initiated.

Durch die Fliehkraftwirkung setzten sich die feste und# flüssige Phase an der Zykloninnenwand ab und bewegen sich in den Unterteil des Zyklons. Das gereinigte Gas steigt spiralig in der Achse des Zyklons empor und wird in dessen Deckel durch eine Leitung 8 abgezogen. Das gereinigte Gas besitzt eine unter Umgebungstemperatur liegende Temperatur und kann daher zur Vorkühlung des ungereinigten Gases dienen. Dazu dient ein Wärmetauscher 1,durch den gereinigtes und ungereinigtes Gas durch Schließen -von Absperrventilen 15, 16 in den Leitungen 7, 8 geleitet-werden;-Anschließend kann das gereinigte Gas z.B. an die Umgebung abgegeben werden. Die ausgefrorenen Verunreinigungen, im Ausführungsbeispiel Eis und Kohlenwasserstoffe, werden im Zyklon beispielsweise mittels eines Siebes zurückgehalten während das Kältemittel mit den gelösten Kohlenwasserstoffen aus dem Zyklon mittels einer Pumpe 6 und einer Leitung 10 abgeleitet werden. Der Zyklonabscheider kann so gestaltet sein, daß aufgrund der verschiedenen spezifischen Gewichte der Feststoffe an bestimmten Stellen nur z.B. Wasser oder Kohlenwasserstoffe abgeschieden werden.Due to the effect of centrifugal force, the solid and # liquid phase settle on the inner wall of the cyclone and move into the lower part of the cyclone. The cleaned Gas rises spirally up the axis of the cyclone and passes through its lid a line 8 withdrawn. The purified gas has a temperature below ambient lying temperature and can therefore be used to pre-cool the unpurified gas. A heat exchanger 1 is used for this, through which purified and unpurified gas passes Closing shut-off valves 15, 16 in lines 7, 8 are conducted; the cleaned gas can e.g. be released into the environment. The frozen ones Impurities, in the exemplary embodiment ice and hydrocarbons, are in the cyclone for example retained by means of a sieve during the Refrigerant with the dissolved hydrocarbons from the cyclone by means of a pump 6 and a line 10 can be derived. The cyclone separator can be designed like this be that due to the different specific gravity of the solids at certain Places only e.g. water or hydrocarbons are separated.

Im Ausführungsbeispiel werden als Kältemittel die Kohlenwasserstoffe verwendet, die als Verunreinigungen aus dem zu reinigenden Gas abgeschieden wurden. Diese kondensierten Kohlenwasserstoffe werden mittels Pumpe 6 über eine Leitung 11 zu einem Wärmetauscher 4 gepumpt, im indirekten-Wärmetausch mit dem Kältemedium einer Kälteanlage 5 auf die erforderliche Temperatur abgekühlt und anschließend über eine Leitung 12 in den Venturi-Wäscher 2 eingeleitet. In diesem Fall ist es lediglich erforderlich, die über die im Kreislauf erforderliche Menge an Kältemittel hinaus anfallenden flüssigen Verunreinigungen aus dem Kreislaufsystem zu ziehen.In the exemplary embodiment, the hydrocarbons are used as the refrigerant used, which were separated as impurities from the gas to be cleaned. These condensed hydrocarbons are pumped 6 through a line 11 is pumped to a heat exchanger 4, in indirect heat exchange with the cooling medium a refrigeration system 5 cooled to the required temperature and then introduced into the venturi scrubber 2 via a line 12. In this case it is all that is required is the amount of refrigerant required in the circuit in addition to drawing any liquid impurities from the circulatory system.

Zweckmäßigerweise erfolgt dies über eine mittels Absperrventil 14 absperrbare Leitung 13, die in Strömungsrichtung des Kältemittels nach Pumpe 6 und vor Wärmetauscher 4 von Leitung 11 abzweigt. Uber Pumpe 6 und Leitung 13 können auch die im Zyklon 3 abgeschiedenen, ausgefrorenen Verunreinigungen von Zeit zu Zeit, nach Erreichen einer besimmten Füllhöhe, abgepumpt werden. Hierzu dient ein, den Filter für die Abtrennung der ausgefrorenen Verunreinigungen von Kältemittel umgehende Leitung 17.This is expediently done via a shut-off valve 14 lockable line 13, which in the flow direction of the refrigerant after pump 6 and branches off from line 11 in front of heat exchanger 4. Via pump 6 and line 13 can also the frozen impurities separated in the cyclone 3 from time to time Time after reaching a certain filling level, can be pumped out. For this purpose a, the filter for separating frozen contaminants from refrigerant immediate line 17.

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Claims (12)

1. Verfahren zur Entfernung von Kohlenwasserstoffen und anderen Verunreinigungen aus einem Gas, dadurch gekennzeichnet, daß das zu reinigende Gas durch Einsprühen eines Kältemittels gekühlt wird, wobei die Verunreinigungen gefrieren und/oder kondensieren, und anschließend die Verunreinigungen zusammen mit dem Kältemittel vom Gas abgetrennt werden.1. Process for removing hydrocarbons and other contaminants from a gas, characterized in that the gas to be cleaned is sprayed in a refrigerant is cooled, whereby the impurities freeze and / or condense, and then the impurities are separated from the gas together with the refrigerant will. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Verunreinigungen aus dem Kältemittel abgetrennt werden und das gereinigte Kältemittel gekühlt und erneut in das zu reinigende Gas eingesprüht wird.2. The method according to claim 1, characterized in that the impurities are separated from the refrigerant and the purified refrigerant is cooled and is sprayed again into the gas to be cleaned. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß zunächst die ausgefrorenen Verunreinigungen durch Sieben von dem mit zu kondensierten Verunreinigungen beladenen Kältemittel und nachfolgend die kondensierten Verunreinigungen durch Destillieren vom Kältemittel abgetrennt werden.3. The method according to claim 2, characterized in that first the frozen impurities by sieving from the impurities to be condensed loaded refrigerant and subsequently the condensed impurities from distillation separated from the refrigerant. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die beim Abkühlen des zu reinigenden Gasstroms auskondensierten Verunreinigungen als Kältemittel dienen+ 4. The method according to claim 1, characterized in that the when the gas stream to be cleaned is cooled down, contaminants condensed out as Refrigerants serve + 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die auskondensierten Verunreinigungen von den ausgefrorenen Verunreinigungen abgetrennt, gekühlt und in das zu reinigende Gas eingesprüht werden, wobei der zur Reinigung des Gases nicht erforderliche Teil der auskondensierten Verunreinigungen vor der Kühlung aus dem Kreislauf abgezogen wird.5. The method according to claim 4, characterized in that the condensed impurities separated from the frozen impurities, cooled and sprayed into the gas to be cleaned, the cleaning of the gas not required part of the condensed impurities before Cooling is withdrawn from the circuit. 6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das zu reinigende Gas vor dem Einsprühendes Kältemittels in Wärmetausch mit gereinigtem Gas gebracht wird.6. The method according to any one of claims 1 to 5, characterized in that that the gas to be cleaned is exchanged with heat before the refrigerant is injected purified gas is brought. 7. Verfahren nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß das Kältemittel im indirekten Wärmetausch mit dem im Kreislauf geführten Kältemedium einer Kälteanlage gekühlt wird.7. The method according to any one of claims 2 to 6, characterized in that that the refrigerant is in indirect heat exchange with the circulating refrigerant a refrigeration system is cooled. 8. Vorrichtung zur Durchführung des Verfahrens mit einer Mischvorrichtung mit Zuleitungen für zu reinigendes Gas und für Kältemittel sowie einer Ableitung, dadurch gekennzeichnet, daß die Mischvorrichtung (2) ein Venturi-Wäscher ist, dessen Ableitung (9) an den Eingang eines Zyklons (3) angeschlossen ist, und. dessen Zuleitung für das Kältemittel (12) über einen Wärmetauscher (4), eine Pumpe (6) in den dem Zyklondeckel mit einer Ableitung (8) für das gereinigte Gas gegenüber-liegenden Zyklonboden mündet.8. Device for performing the method with a mixing device with supply lines for the gas to be cleaned and for refrigerant as well as a discharge line, characterized in that the mixing device (2) is a venturi scrubber, its Discharge (9) is connected to the inlet of a cyclone (3), and. its supply line for the refrigerant (12) via a heat exchanger (4), a pump (6) in the dem Cyclone lid with a discharge line (8) for the cleaned gas on the opposite side Cyclone bottom opens. 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Ableitung (8) des Zyklons (3) für das gereinigte Gas und die Zuleitung (7) für zu reinigendes Gas an jeweils einen Strömungsquerschnitt eines Wärmetauschers (1) angeschlossen sind.9. Apparatus according to claim 8, characterized in that the derivative (8) of the cyclone (3) for the cleaned gas and the feed line (7) for what is to be cleaned Gas on each one flow cross section of a heat exchanger (1) are connected. 10. Vorrichtung nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, daß der zwischen Pumpe (6) und Venturi-Wäscher (2) angeordnete Wärmetauscher (4) einen Strömungsquerschnitt für das Kältemedium einer Kälteanlage (5) besitzt.10. Device according to one of claims 8 or 9, characterized in that that the heat exchanger (4) arranged between the pump (6) and the venturi washer (2) has a flow cross-section for the cooling medium of a refrigeration system (5). 11. Vorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß von der die Pumpe (6) und den Wärmetauscher (4) verbindenden Leitung (11) eine absperrbare Leitung (13) abzweigt.11. Device according to one of claims 8 to 10, characterized in that that of the pump (6) and the heat exchanger (4) connecting line (11) one lockable line (13) branches off. 12. Anwendung des Verfahrens und der Vorrichtung adf die Reinigung von Luft beim Verladen von Kohlenwasserstoffen.12. Use of the method and device adf cleaning of air when loading hydrocarbons.
DE19813149847 1981-12-16 1981-12-16 Process for removing hydrocarbons and other impurities from a gas Withdrawn DE3149847A1 (en)

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