EP2512683B1 - Cyclonic separator for the separation of liquid drops from a gas flow - Google Patents

Cyclonic separator for the separation of liquid drops from a gas flow Download PDF

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Publication number
EP2512683B1
EP2512683B1 EP10790780.0A EP10790780A EP2512683B1 EP 2512683 B1 EP2512683 B1 EP 2512683B1 EP 10790780 A EP10790780 A EP 10790780A EP 2512683 B1 EP2512683 B1 EP 2512683B1
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Prior art keywords
liquid
gas stream
jacket
droplet separator
hood
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EP10790780.0A
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German (de)
French (fr)
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EP2512683A1 (en
Inventor
Jörg HALPAP
Andreas Bode
Eberhard Herrmann
Markus LINSENBÜHLER
Bernd Sachweh
Michael Pilz
Michael Mertler
Matthias Wilhelm Meier
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BASF SE
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BASF SE
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B04C5/04—Tangential inlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B04B7/12—Inserts, e.g. armouring plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B04C5/181—Bulkheads or central bodies in the discharge opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/008—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with injection or suction of gas or liquid into the cyclone

Definitions

  • the invention relates to a centrifugal droplet separator for separating liquid droplets from a feed gas stream containing them.
  • Centrifugal droplet separators also referred to as cyclones, are known in the art and are used, for example, for separating liquid droplets from gas streams containing them.
  • Centrifugal drop separators are rotationally symmetrical apparatus, usually with a vertical axis of rotation, often predominantly cylindrical apparatuses.
  • By tangentially introducing the biphasic liquid / gas mixture to be separated it is imparted a helical motion along the inner wall of the apparatus, whereby separation of the components of the mixture as a function of their density occurs under the action of the centrifugal force.
  • the heavier liquid droplets are deposited from the gas on the inner walls of the Zentrifugaltropfenabscheiders, accumulate in the lower part of the apparatus and are discharged through a discharge nozzle.
  • droplets with a mean diameter ⁇ 5 ⁇ m with a probability of 50% and droplets with a mean diameter ⁇ 12 ⁇ m with a probability of> 99% are deposited in the centrifugal droplet separator.
  • the problem may arise that deposit the liquid droplets or solid crusts on the inner walls of the apparatus, no longer run through the discharge nozzle, so that it to fowling associated with a worsening deposition and finally flooding the apparatus.
  • a discontinuous or a continuous cleaning of the apparatus described above by spraying a rinsing liquid by means of spray nozzles.
  • the cleaning success is not always guaranteed, since solids are trapped in protected areas, for example in louvers in lamella separators or in a wire mesh, and thus often can not be discharged.
  • the rinsing liquid must be dispersed in the gas stream and also be separated therefrom.
  • the FR 2 147 545 describes a Zentrifugaltropfenabscheider for cleaning a gas with tangential supply thereof in the lower, conically shaped portion of the centrifugal separator, and with supply of an auxiliary gas stream in the region of the outlet of the purified gas through tangentially arranged supply ports, wherein the auxiliary gas flow in countercurrent to the flow direction of the gas to be cleaned is supplied.
  • the centrifugal separator is supplied.
  • the gas stream to be purified and the auxiliary gas stream are guided in opposite directions of rotation, but not in the same direction of rotation as in the method of the present invention.
  • the object is achieved by a Zentrifugaltropfenabscheider for separating liquid droplets from a feed gas stream containing them, with vertical longitudinal axis and circular cross-section, with a jacket and hoods at the top and at the bottom of the shell, with tangential supply of the liquid droplets containing feed gas stream on the jacket and with a discharge nozzle for the liquid separated in the centrifugal droplet separator in the region of the lower hood and with a gas outlet nozzle for the gas stream cleaned in the centrifugal droplet separator in the region of the upper hood, which is characterized in that two, three or more inlet openings arranged symmetrically on the circumference of the upper hood a tangential supply of rinsing liquid, in the same direction as the supply of the liquid droplet-containing feed gas stream, are provided.
  • the liquid preferably runs over an edge so that complete wetting of the wall with rinsing liquid is achieved.
  • the flushing liquid according to the invention is introduced tangentially, and thus to the inner walls of the apparatus, it is directly into the areas where the liquid separates from the mixture to be separated, and does not have to be separated from the mixture. This increases the efficiency and leads to an overall lower energy consumption, since complete wetting of the wall is achieved, dry spots on the wall are avoided and thus crust formation is prevented.
  • liquids are used as the rinsing liquid, which can easily be separated again from the liquid to be separated off from the feed gas stream, and which in particular do not chemically react with it.
  • Solvents for the liquid to be separated from the feed gas stream or the same liquid which can be separated off from the feed gas stream can also be used as the rinsing liquid.
  • the rinsing liquid can be used with or without additives.
  • rinsing liquid can also be a reaction, a chemisorption or a physisorption.
  • water can be used as the rinsing liquid.
  • the inlet openings for the rinsing liquid may have a circular cross-section.
  • the inlet openings for the rinsing liquid are formed with a rectangular cross-section.
  • the lower hood tapers frusto-conically towards the discharge nozzle.
  • the steepness of the truncated cone should be chosen so that the liquid flows freely, i. at higher viscosity of the liquid a greater slope.
  • the cone is very steep.
  • the lower hood may also be flat or designed as a dished bottom.
  • apex cone which may preferably be open at the bottom for reasons of easier manufacture, and at the bottom of the lower hood, perpendicular to the floor and radially Plates arranged, which support a uniform outflow of the liquid and the flow of the réelletParkden mixture in the apparatus do not disturb as possible. In this way non-effluent thrombi are avoided.
  • the diameter of the Apexkegels is advantageously adapted to the inner diameter of the Zentrifugaltropfenabscheiders.
  • the apex cone is formed with a diameter corresponding to 0.6 to 0.8 times the inner diameter of the centrifugal droplet separator.
  • the angle in the tip of the Apexkegels is preferably between 100 and 130 °. However, it is also plate-shaped embodiments - without apex cone - possible.
  • the on the bottom of the lower hood perpendicular to the ground and radially arranged sheets act in particular as a flow breaker.
  • a downwardly open dripping apron is arranged in the region of the upper hood, around the gas outlet nozzle, at which liquid droplets are separated from the gas stream which exits via the gas outlet nozzle and drip back into the apparatus.
  • the drip apron preferably has a length corresponding to 1.2 times the length of the gas outlet nozzle projecting into the apparatus.
  • the upper hood at the periphery of which two, three or more inlet openings are provided for a tangential supply of rinsing liquid, widens frustoconically with respect to the circumference of the jacket, an edge forming at the transition between the jacket and the upper hood the rinse liquid is running.
  • the invention also provides a process for separating liquid droplets from a feed gas stream containing them into a centrifugal droplet separator having a vertical longitudinal axis and a circular cross section, with a jacket and hoods at the top and at the bottom of the jacket, with at least one tangential feed of the liquid droplet containing feed gas stream on the mantle and with a discharge nozzle for the liquid deposited in the centrifugal droplet separator in the region of the lower hood and with a central gas outlet for the gas stream purified in the centrifugal droplet separator in the region of the upper hood, which is characterized in that in the region of the upper hood, over two, three or a plurality of inlet openings arranged symmetrically on the circumference thereof, a flushing liquid being introduced tangentially in the same direction as the feed gas stream containing the liquid droplets.
  • the rinsing liquid can be supplied continuously during the entire duration of the supply of the feed gas stream to be separated.
  • the rinsing liquid is fed discontinuously, at intervals.
  • FIG. 1 shows an embodiment of a centrifugal Tropfenabscheiders invention with sheath 1 and hoods 2 at the top and at the bottom of the shell 1, and with tangential feed 3 for the feed gas stream.
  • Zentrifugaltropfenabscheider liquid is discharged through a discharge nozzle 4 in the region of the lower hood 2 and the purified gas stream via a gas outlet nozzle 7 in the region of the upper hood. 2
  • a bottom open Abtropfschürze 8 is provided in the region of the upper hood 2 in the longitudinal sectional view in FIG. 1 to recognize a tangentially arranged inlet opening 9 for a rinsing liquid.
  • FIG. 2 shows the tangentially arranged in the region of the upper hood 2, for example, three inlet openings 9 for a rinsing liquid.
  • the tangential feed 3 and the central gas outlet nozzle 7 can also be seen.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Cyclones (AREA)
  • Centrifugal Separators (AREA)

Description

Die Erfindung betrifft einen Zentrifugaltropfenabscheider zum Abscheiden von Flüssigkeitströpfchen aus einem diese enthaltenden Einsatzgasstrom.The invention relates to a centrifugal droplet separator for separating liquid droplets from a feed gas stream containing them.

Zentrifugaltropfenabscheider, auch als Zyklone bezeichnet, sind in der Verfahrenstechnik bekannt und werden beispielsweise zum Abscheiden von Flüssigkeitströpfchen aus diese enthaltenden Gasströmen eingesetzt. Zentrifugaltropfenabscheider (Zyklone) sind rotationssymmetrische Apparate, mit in der Regel vertikaler Rotationsachse, häufig überwiegend zylindrische Apparate. Indem das aufzutrennende zweiphasige, Flüssigkeits-/Gas-Gemisch tangential zugeführt wird, wird diesem eine spiralförmige Bewegung entlang der Innenwand des Apparates aufgeprägt, wobei unter Einwirkung der Zentrifugalkraft eine Auftrennung der Komponenten des Gemisches in Abhängigkeit von der Dichte derselben erfolgt. Die schwereren Flüssigkeitströpfchen werden aus dem Gas an den Innenwänden des Zentrifugaltropfenabscheiders abgeschieden, sammeln sich im unteren Bereich des Apparates und werden über einen Abführstutzen ausgetragen.Centrifugal droplet separators, also referred to as cyclones, are known in the art and are used, for example, for separating liquid droplets from gas streams containing them. Centrifugal drop separators (cyclones) are rotationally symmetrical apparatus, usually with a vertical axis of rotation, often predominantly cylindrical apparatuses. By tangentially introducing the biphasic liquid / gas mixture to be separated, it is imparted a helical motion along the inner wall of the apparatus, whereby separation of the components of the mixture as a function of their density occurs under the action of the centrifugal force. The heavier liquid droplets are deposited from the gas on the inner walls of the Zentrifugaltropfenabscheiders, accumulate in the lower part of the apparatus and are discharged through a discharge nozzle.

Bevorzugt werden im Zentrifugaltropfenabscheider Tröpfchen mit einem mittleren Durchmesser ≥ 5 µm mit einer Wahrscheinlichkeit von 50 % und Tröpfchen mit einem mittleren Durchmesser ≥ 12 µm mit einer Wahrscheinlichkeit von > 99 % abgeschieden.Preferably, droplets with a mean diameter ≥ 5 μm with a probability of 50% and droplets with a mean diameter ≥ 12 μm with a probability of> 99% are deposited in the centrifugal droplet separator.

Im Falle von viskosen und/oder klebrigen und/oder zu Verkrustungen neigenden und/oder Feststoffe enthaltenden Flüssigkeiten kann das Problem auftreten, dass sich die Flüssigkeitströpfchen oder Feststoffkrusten an den Innenwänden des Apparates ablagern, nicht mehr über den Abführstutzen ablaufen, so dass es zum Fowling verbunden mit einer sich verschlechternden Abscheidung und schließlich zum Fluten des Apparates kommt.In the case of viscous and / or sticky and / or prone to incrustations and / or solids containing liquids, the problem may arise that deposit the liquid droplets or solid crusts on the inner walls of the apparatus, no longer run through the discharge nozzle, so that it to fowling associated with a worsening deposition and finally flooding the apparatus.

Zum Abscheiden von Flüssigkeitströpfchen aus Gasströmen für niedrige Flüssigkeitsbeladungen sind auch weitere Apparate bekannt, die Flüssigkeitströpfchen mit einem mittleren Durchmesser > 5 µm aufgrund von Trägheitskräften abscheiden. Flüssigkeitströpfchen der obigen Größe können einer Umlenkung des Gasstromes nicht folgen, prallen auf ein Hindernis und werden aus dem Gasstrom (Prozessgas), zum Teil nach Koaleszenz mit anderen Tröpfchen, ausgeschleust. Apparate, bei denen die Flüssigkeitsabscheidung nach dem obigen Prinzip erfolgt, sind beispielsweise Lascheider, Dralltropfenabscheider oder Drahtgestricke (wire mesh).. In diesen Apparaten kann es jedoch durch Ablagerungen zu Krustenbildung kommen, so dass nicht über einen längeren Zeitraum konstant hohe Abscheidegrade erreicht werden können, weil die für die Abscheidung relevanten Elemente durch Belege in kürzester Zeit deaktiviert werden oder verstopfen.For the separation of liquid droplets from gas streams for low liquid loadings, other apparatuses are known which deposit liquid droplets with a mean diameter of> 5 μm due to inertial forces. Liquid droplets of the above size can not follow a deflection of the gas stream, bounce on an obstacle and are discharged from the gas stream (process gas), in part after coalescence with other droplets. Apparatus in which the liquid separation takes place according to the above principle are, for example, Lascheider, Dralltropfenab or wire mesh (wire mesh) .. In these apparatuses, however, deposits can lead to crust formation, so that over a longer period consistently high rates of separation can not be achieved because the relevant elements for the deposition by vouchers in a very short time or clog.

In der Regel erfolgt eine diskontinuierliche oder auch eine kontinuierliche Reinigung der oben beschriebenen Apparate durch Einsprühen einer Spülflüssigkeit mittels Sprühdüsen. Der Reinigungserfolg ist jedoch nicht immer gewährleistet, da sich Feststoffe in geschützten Bereichen verfangen, beispielsweise in Fangrillen bei Lamellenabscheidern oder in einem Drahtgestrick, und somit häufig nicht ausgetragen werden können. Zudem muss die Spülflüssigkeit im Gasstrom dispergiert und aus diesem auch wieder abgeschieden werden.In general, a discontinuous or a continuous cleaning of the apparatus described above by spraying a rinsing liquid by means of spray nozzles. However, the cleaning success is not always guaranteed, since solids are trapped in protected areas, for example in louvers in lamella separators or in a wire mesh, and thus often can not be discharged. In addition, the rinsing liquid must be dispersed in the gas stream and also be separated therefrom.

Die FR 2 147 545 beschreibt einen Zentrifugaltropfenabscheider zur Reinigung eines Gases, mit tangentialer Zuführung desselben im unteren, konisch ausgebildeten Bereich des Zentrifugalabscheiders, sowie mit Zuführung eines Hilfsgasstromes im Bereich des Austritts des gereinigten Gases, über tangential angeordnete Zuführöffnungen, wobei der Hilfsgasstrom im Gegenstrom zur Strömungsrichtung des zu reinigenden Gases zugeführt wird.The FR 2 147 545 describes a Zentrifugaltropfenabscheider for cleaning a gas with tangential supply thereof in the lower, conically shaped portion of the centrifugal separator, and with supply of an auxiliary gas stream in the region of the outlet of the purified gas through tangentially arranged supply ports, wherein the auxiliary gas flow in countercurrent to the flow direction of the gas to be cleaned is supplied.

Abweichend vom Verfahren der vorliegenden Erfindung wird ausschließlich ein Gasstrom, nicht jedoch eine Spülflüssigkeit, dem Zentrifugalabscheider zugeführt. Darüber hinaus werden der zu reinigende Gasstrom und der Hilfsgasstrom in entgegengesetztem Drehsinn, nicht jedoch im gleichen Drehsinn, wie im Verfahren der vorliegenden Erfindung geführt.Notwithstanding the method of the present invention, only a gas stream, but not a rinsing liquid, the centrifugal separator is supplied. In addition, the gas stream to be purified and the auxiliary gas stream are guided in opposite directions of rotation, but not in the same direction of rotation as in the method of the present invention.

Es war daher Aufgabe der Erfindung, einen Zentrifugaltropfenabscheider für die Auftrennung von Flüssigkeits-/Gas-Gemischen zur Verfügung zu stellen, der die obigen Nachteile nicht aufweist.It was therefore an object of the invention to provide a Zentrifugaltropfenabscheider for the separation of liquid / gas mixtures available, which does not have the above disadvantages.

Die Aufgabe wird gelöst durch einen Zentrifugaltropfenabscheider zum Abscheiden von Flüssigkeitströpfchen aus einem diese enthaltenden Einsatzgasstrom, mit vertikaler Längsachse und kreisförmigem Querschnitt, mit einem Mantel sowie mit Hauben am oberen und am unteren Ende des Mantels, mit tangentialer Zuführung des Flüssigkeitströpfchen enthaltenden Einsatzgasstromes am Mantel sowie mit einem Abführstutzen für die im Zentrifugaltropfenabscheider abgeschiedene Flüssigkeit im Bereich der unteren Haube und mit einem Gasaustrittsstutzen für den im Zentrifugaltropfenabscheider gereinigten Gasstrom im Bereich der oberen Haube, der dadurch gekennzeichnet ist, dass zwei, drei oder mehrere, symmetrisch am Umfang der oberen Haube angeordnete Eintrittsöffnungen für eine tangentiale Zuführung von Spülflüssigkeit, in derselben Richtung wie die Zuführung des Flüssigkeitströpfchen enthaltenden Einsatzgasstromes, vorgesehen sind.The object is achieved by a Zentrifugaltropfenabscheider for separating liquid droplets from a feed gas stream containing them, with vertical longitudinal axis and circular cross-section, with a jacket and hoods at the top and at the bottom of the shell, with tangential supply of the liquid droplets containing feed gas stream on the jacket and with a discharge nozzle for the liquid separated in the centrifugal droplet separator in the region of the lower hood and with a gas outlet nozzle for the gas stream cleaned in the centrifugal droplet separator in the region of the upper hood, which is characterized in that two, three or more inlet openings arranged symmetrically on the circumference of the upper hood a tangential supply of rinsing liquid, in the same direction as the supply of the liquid droplet-containing feed gas stream, are provided.

Bevorzugt läuft die Flüssigkeit über eine Kante, damit eine komplette Benetzung der Wand mit Spülflüssigkeit erreicht wird.The liquid preferably runs over an edge so that complete wetting of the wall with rinsing liquid is achieved.

Es wurde gefunden, dass ein weitgehend ungehinderter Ablauf auch von hochviskosen und/oder klebrigen und/oder einen oder mehrere Feststoffe enthaltenden Flüssigkeiten möglich ist, und dass es möglich ist, die Abscheidung von Flüssigkeit, insbesondere von hochviskoser und/oder klebriger Flüssigkeit, an den Innenwänden des Zentrifugaltropfenabscheiders weitgehend oder vollständig zu verhindern, indem während des Betriebs am oberen Ende desselben, in derselben Richtung wie die Zuführung des aufzutrennenden, Flüssigkeitströpfchen enthaltenden Einsatzgasstromes, eine Spül-EK09-1022PC flüssigkeit eingeleitet wird. Indem die Spülflüssigkeit erfindungsgemäß tangential, und somit an die Innenwände des Apparates eingeleitet wird, wird sie unmittelbar in die Bereiche, wo sich die Flüssigkeit aus dem aufzutrennenden Gemisch abscheidet, geleitet, und muss nicht erst aus dem Gemisch abgetrennt werden. Dies erhöht die Effizienz und führt zu einem insgesamt niedrigeren Energieverbrauch, da eine vollständige Benetzung der Wand erreicht, trockene Stellen an der Wand vermieden werden und somit eine Krustenbildung verhindert wird.It has been found that a largely unhindered process is also possible for liquids containing high viscosity and / or tackiness and / or one or more solids, and that it is possible to separate the liquid, in particular highly viscous and / or sticky liquid, from the liquid Inner walls of the Zentrifugaltropfenabscheiders largely or completely prevented by during operation at the upper end thereof, in the same direction as the supply of the liquid droplet-containing feed gas stream to be separated, a rinsing EK09-1022PC liquid is initiated. By the flushing liquid according to the invention is introduced tangentially, and thus to the inner walls of the apparatus, it is directly into the areas where the liquid separates from the mixture to be separated, and does not have to be separated from the mixture. This increases the efficiency and leads to an overall lower energy consumption, since complete wetting of the wall is achieved, dry spots on the wall are avoided and thus crust formation is prevented.

Als Spülflüssigkeit werden insbesondere Flüssigkeiten eingesetzt, die sich von der dem Einsatzgasstrom abzutrennenden Flüssigkeit leicht wieder abtrennen lassen, und die insbesondere mit dieser nicht chemisch reagieren.In particular liquids are used as the rinsing liquid, which can easily be separated again from the liquid to be separated off from the feed gas stream, and which in particular do not chemically react with it.

Als Spülflüssigkeit können auch Lösungsmittel für die vom Einsatzgasstrom abzutrennende Flüssigkeit oder die gleiche Flüssigkeit, die aus dem Einsatzgasstrom abzutrennen ist, eingesetzt werden.Solvents for the liquid to be separated from the feed gas stream or the same liquid which can be separated off from the feed gas stream can also be used as the rinsing liquid.

Die Spülflüssigkeit kann mit oder ohne Zusatzstoffe eingesetzt werden.The rinsing liquid can be used with or without additives.

Mit der Spülflüssigkeit kann auch eine Reaktion, eine Chemisorption oder auch eine Physisorption erfolgen.With the rinsing liquid can also be a reaction, a chemisorption or a physisorption.

Bevorzugt kann als Spülflüssigkeit Wasser eingesetzt werden.Preferably, water can be used as the rinsing liquid.

Die Eintrittsöffnungen für die Spülflüssigkeit können einen kreisförmigen Querschnitt aufweisen. In einer bevorzugten Ausführungsform sind die Eintrittsöffnungen für die Spülflüssigkeit mit rechteckigem Querschnitt ausgebildet.The inlet openings for the rinsing liquid may have a circular cross-section. In a preferred embodiment, the inlet openings for the rinsing liquid are formed with a rectangular cross-section.

In einer bevorzugten Ausführungsform verjüngt sich die untere Haube kegelstumpfförmig zum Abführstutzen hin. Durch diese geometrische Ausgestaltung wird das Abfließen der abgeschiedenen Flüssigkeit erleichtert.In a preferred embodiment, the lower hood tapers frusto-conically towards the discharge nozzle. By this geometric configuration, the flow of the separated liquid is facilitated.

Die Steilheit des Kegelstumpfes ist so zu wählen, dass die Flüssigkeit frei abfließt, d.h. bei höherer Viskosität der Flüssigkeit eine größere Steilheit. So wird bei hochviskosen Flüssigkeiten, beispielsweise mit der Viskosität von Honig, der Konus sehr steil ausgebildet. Für gut abfließende Stoffe mit wasserähnlicher Viskosität ist kein Konus erforderlich. Für die Abtrennung derartiger Flüssigkeiten kann die untere Haube auch eben oder als Klöpperboden ausgeführt sein.The steepness of the truncated cone should be chosen so that the liquid flows freely, i. at higher viscosity of the liquid a greater slope. Thus, in highly viscous liquids, for example, with the viscosity of honey, the cone is very steep. For well-drained substances with water-like viscosity no cone is required. For the separation of such liquids, the lower hood may also be flat or designed as a dished bottom.

In einer weiteren bevorzugten Ausführungsform ist auf dem Boden der unteren Haube ein Apexkegel, der bevorzugt - aus Gründen einer einfacheren Fertigung - unten offen sein kann, und auf dem Boden der unteren Haube, senkrecht zum Boden und radial Bleche angeordnet, die ein gleichförmiges Abfließen der Flüssigkeit unterstützen und die Strömung des aufzutrennenden Gemisches im Apparat möglichst nicht stören. Auf diese Weise werden nicht abfließende Thromben vermieden.In a further preferred embodiment, at the bottom of the lower hood is an apex cone, which may preferably be open at the bottom for reasons of easier manufacture, and at the bottom of the lower hood, perpendicular to the floor and radially Plates arranged, which support a uniform outflow of the liquid and the flow of the aufzutrennenden mixture in the apparatus do not disturb as possible. In this way non-effluent thrombi are avoided.

Der Durchmesser des Apexkegels wird vorteilhaft an den Innendurchmesser des Zentrifugaltropfenabscheiders angepasst. Bevorzugt wird der Apexkegel mit einem Durchmesser entsprechend dem 0,6 bis 0,8-fachen des Innendurchmessers des Zentrifugaltropfenabscheiders ausgebildet. Der Winkel in der Spitze des Apexkegels liegt bevorzugt zwischen 100 und 130°. Es sind allerdings auch plattenförmige Ausführungsformen - ohne Apexkegel - möglich.The diameter of the Apexkegels is advantageously adapted to the inner diameter of the Zentrifugaltropfenabscheiders. Preferably, the apex cone is formed with a diameter corresponding to 0.6 to 0.8 times the inner diameter of the centrifugal droplet separator. The angle in the tip of the Apexkegels is preferably between 100 and 130 °. However, it is also plate-shaped embodiments - without apex cone - possible.

Die auf dem Boden der unteren Haube senkrecht zum Boden und radial angeordneten Bleche fungieren insbesondere als Strömungsbrecher.The on the bottom of the lower hood perpendicular to the ground and radially arranged sheets act in particular as a flow breaker.

In einer weiteren bevorzugten Ausführungsform ist im Bereich der oberen Haube, um den Gasaustrittsstutzen herum, eine nach unten offene Abtropfschürze angeordnet, an der Flüssigkeitströpfchen aus dem Gasstrom, der über den Gasaustrittsstutzen austritt, abgeschieden werden und in den Apparat zurück abtropfen.In a further preferred embodiment, a downwardly open dripping apron is arranged in the region of the upper hood, around the gas outlet nozzle, at which liquid droplets are separated from the gas stream which exits via the gas outlet nozzle and drip back into the apparatus.

Die Abtropfschürze weist bevorzugt eine Länge entsprechend der 1,2-fachen Länge des in den Apparat hineinragenden Gasaustrittstutzens auf.The drip apron preferably has a length corresponding to 1.2 times the length of the gas outlet nozzle projecting into the apparatus.

Vorteilhaft erweitert sich die obere Haube, an deren Umfang zwei, drei oder mehrere Eintrittsöffnungen für eine tangentiale Zuführung von Spülflüssigkeit vorgesehen sind, sich gegenüber dem Umfang des Mantels kegelstumpfförmig, wobei sich am Übergang zwischen dem Mantel und der oberen Haube eine Kante ausbildet, über die die Spülflüssigkeit läuft.Advantageously, the upper hood, at the periphery of which two, three or more inlet openings are provided for a tangential supply of rinsing liquid, widens frustoconically with respect to the circumference of the jacket, an edge forming at the transition between the jacket and the upper hood the rinse liquid is running.

Gegenstand der Erfindung ist auch ein Verfahren zur Abtrennung von Flüssigkeitströpfchen aus einem diese enthaltenden Einsatzgasstrom in einen Zentrifugaltropfenabscheider mit vertikaler Längsachse und kreisförmigem Querschnitt, mit einem Mantel sowie mit Hauben am oberen und am unteren Ende des Mantels, mit mindestens einer tangentialen Zuführung des Flüssigkeitströpfchen enthaltenden Einsatzgasstromes am Mantel sowie mit einem Abführstutzen für die im Zentrifugaltropfenabscheider abgeschiedene Flüssigkeit im Bereich der unteren Haube und mit einem zentralen Gasaustrittsstutzen für den im Zentrifugaltropfenabscheider gereinigten Gasstrom im Bereich der oberen Haube, das dadurch gekennzeichnet ist, dass im Bereich der oberen Haube, über zwei, drei oder mehrere, symmetrisch am Umfang derselben angeordnete Eintrittsöffnungen tangential, in derselben Richtung wie der Flüssigkeitströpfchen enthaltende Einsatzgasstrom, eine Spülflüssigkeit eingeleitet wird.The invention also provides a process for separating liquid droplets from a feed gas stream containing them into a centrifugal droplet separator having a vertical longitudinal axis and a circular cross section, with a jacket and hoods at the top and at the bottom of the jacket, with at least one tangential feed of the liquid droplet containing feed gas stream on the mantle and with a discharge nozzle for the liquid deposited in the centrifugal droplet separator in the region of the lower hood and with a central gas outlet for the gas stream purified in the centrifugal droplet separator in the region of the upper hood, which is characterized in that in the region of the upper hood, over two, three or a plurality of inlet openings arranged symmetrically on the circumference thereof, a flushing liquid being introduced tangentially in the same direction as the feed gas stream containing the liquid droplets.

Die Spülflüssigkeit kann kontinuierlich, während der gesamten Dauer der Zuführung des aufzutrennenden Einsatzgasstromes, zugeführt werden.The rinsing liquid can be supplied continuously during the entire duration of the supply of the feed gas stream to be separated.

In einer weiteren Ausführungsform des Verfahrens wird die Spülflüssigkeit diskontinuierlich, in zeitlichen Abständen, zugeführt.In a further embodiment of the method, the rinsing liquid is fed discontinuously, at intervals.

Die Erfindung wird im Folgenden anhand einer Zeichnung näher erläutert.The invention will be explained in more detail below with reference to a drawing.

Es zeigen im Einzelnen:

Figur 1
eine schematische Darstellung eines erfindungsgemäßen Zentrifugaltropfenabscheiders im Längsschnitt und
Figur 2
einen Querschnitt durch eine Ausführungsform eines erfindungsgemäßen Zentrifugaltropfenabscheiders im Bereich der Eintrittsöffnungen für die Spülflüssigkeit.
They show in detail:
FIG. 1
a schematic representation of a Zentrifugaltropfenabscheiders invention in longitudinal section and
FIG. 2
a cross section through an embodiment of a Zentrifugaltropfenabscheiders invention in the region of the inlet openings for the rinsing liquid.

Die Längsschnittdarstellung in Figur 1 zeigt eine Ausführungsform eines erfindungsgemäßen Zentrifugaltropfenabscheiders mit Mantel 1 und Hauben 2 am oberen und am unteren Ende des Mantels 1, und mit tangentialer Zuführung 3 für den Einsatzgasstrom.The longitudinal section in FIG. 1 shows an embodiment of a centrifugal Tropfenabscheiders invention with sheath 1 and hoods 2 at the top and at the bottom of the shell 1, and with tangential feed 3 for the feed gas stream.

Die im Zentrifugaltropfenabscheider abgeschiedene Flüssigkeit wird über einen Abführstutzen 4 im Bereich der unteren Haube 2 abgeleitet und der gereinigte Gasstrom über einen Gasaustrittsstutzen 7 im Bereich der oberen Haube 2.The separated in Zentrifugaltropfenabscheider liquid is discharged through a discharge nozzle 4 in the region of the lower hood 2 and the purified gas stream via a gas outlet nozzle 7 in the region of the upper hood. 2

In der in der Figur dargestellten bevorzugten Ausführungsform ist im Bereich der unteren Haube 2 ein beispielhaft unten offener Apexkegel 5 und auf dem Boden der unteren Haube 2 senkrecht hierzu, radial ausgerichtete Bleche 6 angeordnet. Im Bereich der oberen Haube 2 ist, um den Gasaustrittsstutzen 7 herum, eine unten offene Abtropfschürze 8 vorgesehen. Im Bereich der oberen Haube 2 ist in der Längsschnittdarstellung in Figur 1 eine tangential angeordnete Eintrittsöffnung 9 für eine Spülflüssigkeit zu erkennen.In the preferred embodiment shown in the figure, in the region of the lower hood 2, an apex cone 5 open by way of example below and on the bottom of the lower hood 2 perpendicular thereto, radially aligned sheets 6 are arranged. In the region of the upper hood 2, around the gas outlet nozzle 7 around, a bottom open Abtropfschürze 8 is provided. In the area of the upper hood 2 is in the longitudinal sectional view in FIG. 1 to recognize a tangentially arranged inlet opening 9 for a rinsing liquid.

Die Querschnittsdarstellung in Figur 2 zeigt die im Bereich der oberen Haube 2 tangential angeordneten, beispielhaft drei Eintrittsöffnungen 9 für eine Spülflüssigkeit. In der Figur ist ebenfalls die tangentiale Zuführung 3 und der zentrale Gasaustrittsstutzen 7 zu erkennen.The cross-sectional view in FIG. 2 shows the tangentially arranged in the region of the upper hood 2, for example, three inlet openings 9 for a rinsing liquid. In the figure, the tangential feed 3 and the central gas outlet nozzle 7 can also be seen.

Claims (5)

  1. A process for separating liquid droplets out of a feed gas stream comprising them in a centrifugal droplet separator with a vertical longitudinal axis and circular cross section, with a jacket (1) and with hoods (2) at the upper and lower ends of the jacket (1), with tangential supply (3) of the feed gas stream comprising liquid droplets at the jacket (1) and with an outlet stub (4) for the liquid separated out in the centrifugal droplet separator in the region of the lower hood (2), and with a gas outlet stub (7) for the gas stream cleaned in the centrifugal droplet separator in the region of the upper hood (2), wherein a cleaning liquid is supplied via two, three or more inlet orifices (9) arranged tangentially and symmetrically at the periphery of the upper hood (2), in the same direction as the feed gas stream comprising liquid droplets.
  2. The process according to claim 1, wherein the cleaning liquid is supplied continuously.
  3. The process according to claim 1 or 2, wherein a centrifugal droplet separator is used, where an apex cone (5) and, at the base of the lower hood, metal sheets arranged radially and perpendicularly to the base are provided over the outlet stub (4).
  4. The process according to any of claims 1 to 3, wherein a centrifugal droplet separator is used, where, at a drip skirt open at the bottom, arranged around the gas outlet stub (7) in the region of the upper hood (2), liquid droplets are separated out of the gas stream which leaves via the gas outlet stub (7).
  5. The process according to any of claims 1 to 4, wherein a centrifugal droplet separator is used, where the upper hood, at the periphery of which two, three or more inlet orifices for a tangential supply of cleaning liquid are provided, widens in the manner of a frustocone with respect to the circumference of the jacket (1), forming, at the transition between the jacket (1) and the upper hood (2), an edge over which the cleaning liquid runs.
EP10790780.0A 2009-12-15 2010-12-13 Cyclonic separator for the separation of liquid drops from a gas flow Active EP2512683B1 (en)

Priority Applications (1)

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EP10790780.0A EP2512683B1 (en) 2009-12-15 2010-12-13 Cyclonic separator for the separation of liquid drops from a gas flow

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09179245 2009-12-15
EP10790780.0A EP2512683B1 (en) 2009-12-15 2010-12-13 Cyclonic separator for the separation of liquid drops from a gas flow
PCT/EP2010/069521 WO2011082975A1 (en) 2009-12-15 2010-12-13 Centrifugal droplet separator for separating liquid droplets from a feed gas flow containing said droplets

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EP2512683A1 EP2512683A1 (en) 2012-10-24
EP2512683B1 true EP2512683B1 (en) 2015-03-18

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US (1) US20120302420A1 (en)
EP (1) EP2512683B1 (en)
JP (1) JP5745536B2 (en)
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CN102725069B (en) 2015-11-25
KR20120101713A (en) 2012-09-14
KR101770362B1 (en) 2017-08-22
CN102725069A (en) 2012-10-10
JP2013513476A (en) 2013-04-22
US20120302420A1 (en) 2012-11-29
ES2539360T3 (en) 2015-06-30
JP5745536B2 (en) 2015-07-08
WO2011082975A1 (en) 2011-07-14
EP2512683A1 (en) 2012-10-24

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