EP1414582B1 - Deviation ring for a self-distributing centrifuge - Google Patents

Deviation ring for a self-distributing centrifuge Download PDF

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Publication number
EP1414582B1
EP1414582B1 EP02747462A EP02747462A EP1414582B1 EP 1414582 B1 EP1414582 B1 EP 1414582B1 EP 02747462 A EP02747462 A EP 02747462A EP 02747462 A EP02747462 A EP 02747462A EP 1414582 B1 EP1414582 B1 EP 1414582B1
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EP
European Patent Office
Prior art keywords
self
centrifuge according
discharging centrifuge
collection vessel
deflector ring
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EP02747462A
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German (de)
French (fr)
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EP1414582B2 (en
EP1414582A1 (en
Inventor
Ernst-Ulrich Himmen
Markus Longerich
Jürgen Scholz
Detlef Freyer
Ulrich Esser
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GEA Mechanical Equipment GmbH
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GEA Westfalia Separator GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor
    • B04B11/05—Base discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B04B7/04—Casings facilitating discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/12—Suspending rotary bowls ; Bearings; Packings for bearings

Definitions

  • the invention relates to equipment for the separation of liquids and solids in centrifuges, in particular Tellerseparatoren with automatic discharge.
  • the invention particularly relates to a paste deflecting ring with an annular baffle for a self-discharging centrifuge and the self-discharging centrifuge.
  • Tellerseparatoren are centrifuges, equipped with a central inlet for the suspension, located in the drum conical plates, which are used by the existing centrifugal force and the short sedimentation as a separator for fine particles.
  • the deposited particles slide along the plates into the solids collection space toward the largest diameter of the drum.
  • the clarified liquid is depressurized via an overflow weir or by means of a trained as a pump impeller so-called.
  • Gripper dissipated under pressure.
  • drums For low solids content, disc separators with a closed drum are in use, which must be cleared by hand. For higher solids contents, the drums are equipped with an emptying system which allows the entire contents of the drum to be discharged as solids and liquid as sludge.
  • the DE 198 46 535 A discloses a centrifuge with which a largely lossless solids extraction is made possible from a centrifuged material.
  • the separated from the centrifuge drums solid is collected in a bag, which is inserted into a container, the centrifuge drum protrudes into the interior of the container and into an upper opening of the bag.
  • solids can be collected lossless from the centrifuged.
  • the WO 95/21697 discloses a device for centrifugal separation, for example for the separation of sugar, which has, inter alia, a deflector.
  • the invention now uses in the Aufrahabe to create a self-discharging centrifuge for the process engineering treatment of highly concentrated pastes with a hanging drum with two or more discharge slots, which allows a gentle deflection of the ejected from the discharge slot solid into a receptacle of the centrifuge.
  • the paste discharge takes place under centrifugal acceleration in the horizontal direction on a circular circumference and could be collected in an annular container.
  • the invention relates to a device consisting of a Pasteumlenkring and a connected or detachable paste container, which is able to receive the paste from several drum emptying.
  • This ring is designed so that a deflection is associated with the lowest possible product losses.
  • the invention furthermore relates to a self-discharging centrifuge for the process-engineering treatment of highly concentrated pastes at least consisting of an optionally coolable housing, a feed line for the suspension, a discharge for the clarified liquid, a suspended drum connected to an overhead drive part with two or more discharge slots, one optionally detachable from the housing collecting container and a discharge device for the paste, characterized in that the centrifuge comprises a deflection ring according to the invention.
  • the deflection ring is formed with a jacket cooling.
  • the cooling jacket is e.g. a double wall on the outer circumference of the Umlenkringes, which can be traversed by a heat exchange medium.
  • a special deflecting ring is characterized in that the inner contour of the baffle wall is formed immediately below the impact surface, in particular over any longitudinal section of the deflecting ring, circular or parabolic.
  • the deflection is made even more gentle on the product and further reduces the shear.
  • the deflection ring is formed so that the baffle wall in the region below the Austragsschlitzes a curved inner contour, seen in geometric longitudinal section, having a radius of curvature of> 20 mm, preferably from 30 to 50 mm.
  • the latter curved wall surface can also be designed according to a curve with a variable radius over the course of travel.
  • the baffle wall of the deflection ring has an angle of attack y to the horizontal of 3 to 30 °, preferably 5 to 15 °, in the region above the opening width of the discharge slot.
  • a preferred variant of the deflection ring is characterized in that the tangent of the inner contour of the baffle surface in the region below the deflection contour of the deflection ring relative to the vertical in the geometric longitudinal section seen an angle of attack 3 to 30 °, preferably from 5 to 15 °.
  • the vertical is parallel to the axis of rotation of the drum.
  • the deflection ring has in a preferred variant at its lower end a tear-off edge, which is optionally undercut.
  • the deflecting ring is in particular connected in one piece with a collecting container or particularly preferably separably connected to the collecting container of the centrifuge.
  • the product-contacting surface of the deflecting ring is provided with a lubricious coating, in particular made of PTFE or metal alloys.
  • the deflection ring has one or more nozzles for the injection of liquid nitrogen.
  • nozzles are in particular distributed on the circumference of the deflection ring below the impact surface, which corresponds to the opening width of the Austragsschlitzes.
  • the collecting container is preferably configured cylindrically conically narrowing downwards or downwards.
  • the conical constriction of the collecting container facilitates the discharge of e.g. frozen product from the container.
  • the upper edge of the container is in particular designed so that below the preferably attached spoiler lip of the deflection ring results in a low-flow turbulence.
  • the product-contacting inner surfaces of the collecting container are also provided in a preferred embodiment with a lubricious coating, in particular of PTFE or metal alloys.
  • a bag of flexible material is particularly preferably inserted, which can be fixed in particular by means of negative pressure to the container walls.
  • Suitable materials for the bag are all film plastics, in particular polypropylene, polyethylene, polyvinyl chloride.
  • the collecting container is formed in a preferred further form of the centrifuge with a tempering device, in particular with a jacket cooling.
  • the collecting container preferably additionally has means for transport, in particular by means of conveyor devices.
  • the upper opening of the collecting container is particularly preferably designed as a partial flange.
  • the collecting container is closable, for example, with a lid and designed so that docking with other procedural devices, in particular a dissolving vessel is possible.
  • the collecting container is designed jacket cooling.
  • one or more nozzles may be mounted, through which liquid nitrogen can be introduced into the gas space in the vicinity of the rotating drum in order to suppress the heating of the discharge space by air friction.
  • the container may be made of metallic or non-metallic materials.
  • the container can be arranged detachably or non-detachably in a frame which is transported or stackable by means of industrial trucks.
  • the container can be provided with a lid or equipped with an automatic opening slide and be suitable for loading dissolving boilers.
  • the container can be equipped with a mashing or melting device, which allows the content to be conveyed as a flowable suspension in the dissolving vessel.
  • the container can also be equipped with jacket cooling, eg for use in biotechnology.
  • the discharge of a biological paste obtained in the fractionation of human blood plasma is carried out from a centrifuge drum 14 with an outer diameter of 468 mm at a drum speed of 7000 l / min and deflection of the blood plasma paste by a Pasteumlenkring 4.
  • the centrifuge 1 has a drive part 13 for driving the drum 14 with a supply line 11 for the plasma.
  • the drum 14 is suspended in a separable lower part of the centrifuge 1, which comprises the jacket housing 10, with feed lines 19 and discharges 22 for a cooling liquid and feed lines 9 for liquid nitrogen, the deflection ring 4 and the collecting container 7.
  • the receptacle has a cooling jacket 16 with leads 20 and leads 21 and welded transport tabs 18.
  • the drum 14 also has an outlet 12 for the clarified liquid.
  • Fig. 2 is the deflection ring 4 in detail again.
  • the angle ⁇ above the opening width of the discharge slot 3 is also inclined by 15 ° to the horizontal, so that the impact surface 8 itself and the overlying area in the projection form a straight line.
  • the discharged paste is deflected by a, viewed in longitudinal section, circular contour with a radius of curvature r of 45 ° in the direction of the container bottom of the collecting container 7.
  • the Pasteumlenkring 5 has at its lower end a spoiler edge. 6

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  • Centrifugal Separators (AREA)

Abstract

The invention relates to a deviation ring for paste comprising an annular rebound wall ( 2 ) for a self-distributing centrifuge ( 1 ). The invention also relates to a corresponding self-distributing centrifuge ( 1 ). In the deviation ring, the angle of incidence ? of the tangents of the rebound wall ( 2 ) of the deviation ring ( 4 ), opposite the distribution slit ( 3 ) of the centrifuge ( 1 ), in relation to the horizontal, is between 3 and 60° over the entire opening width of the distribution slit ( 3 ).

Description

Die Erfindung betrifft Ausrüstungen zur Trennung von Flüssigkeiten und Feststoffen in Zentrifugen, insbesondere Tellerseparatoren mit selbsttätigem Austrag. Die Erfindung betrifft insbesondere einen Pasten-Umlenkring mit ringförmiger Prallwand für eine selbstaustragende Zentrifuge und die selbstaustragende Zentrifuge.The invention relates to equipment for the separation of liquids and solids in centrifuges, in particular Tellerseparatoren with automatic discharge. The invention particularly relates to a paste deflecting ring with an annular baffle for a self-discharging centrifuge and the self-discharging centrifuge.

Tellerseparatoren sind Zentrifugen, ausgerüstet mit einem zentralen Zulauf für die Suspension, in der Trommel befindlichen konischen Tellern, welche durch die vorhandene Fliehkraft und die kurzen Sedimentationswege als Abscheider für feine Partikeln dienen. Die abgeschiedenen Partikeln gleiten entlang der Teller in den Feststoffsammelraum zum größten Durchmesser der Trommel hin. Die geklärte Flüssigkeit wird über ein Überlaufwehr drucklos oder mittels eines als Pumpenlaufrad ausgebildeten sogen. Greifers unter Druck abgeführt.Tellerseparatoren are centrifuges, equipped with a central inlet for the suspension, located in the drum conical plates, which are used by the existing centrifugal force and the short sedimentation as a separator for fine particles. The deposited particles slide along the plates into the solids collection space toward the largest diameter of the drum. The clarified liquid is depressurized via an overflow weir or by means of a trained as a pump impeller so-called. Gripper dissipated under pressure.

Für geringe Feststoffgehalte sind Tellerseparatoren mit geschlossener Trommel im Einsatz, welche von Hand ausgeräumt werden müssen. Für höhere Feststoffgehalte sind die Trommeln mit einem Entleersystem, ausgerüstet, welches es gestattet, den gesamten Trommelinhalt mit Feststoff und Flüssigkeit als Schlamm auszutragen.For low solids content, disc separators with a closed drum are in use, which must be cleared by hand. For higher solids contents, the drums are equipped with an emptying system which allows the entire contents of the drum to be discharged as solids and liquid as sludge.

Es sind Tellerseparatoren mit stehender oder hängender Trommel bekannt.There are Tellerseparatoren with upright or hanging drum known.

Aus der deutschen Offenlegungsschrift DE 198 46 535 A1 ist eine Zentrifuge mit hängender Trommel bekannt, bei der zum Auffangen des Feststoffes unterhalb der Trommel ein Schlauchbeutel eingesetzt ist. Der Behälter der Zentrifuge ist im Bereich der Ausschleuderzone der Trommel zylindrisch ausgeführt.From the German patent application DE 198 46 535 A1 is a centrifuge with hanging drum is known in which a tubular bag is used to collect the solid below the drum. The container of the centrifuge is cylindrical in the area of the discharge zone of the drum.

Dies hat den Nachteil, dass die ausgeschleuderten Feststoffe im Bereich der Ausschleuderzone hängen bleiben können und ein zentrales Sammeln der Feststoffe nicht möglich ist.This has the disadvantage that the ejected solids can get stuck in the discharge zone and central collection of the solids is not possible.

Bekannt ist auch, dass bei gut fließenden Feststoffpasten durch Realisierung einer äußerst kurzen Trommelöffnungszeit sog. Teilentschlammungen möglich sind, die eine höhere Feststoffkonzentration in der ausgetragenen Paste zulassen.It is also known that with well-flowing solid pastes by realization of an extremely short drum opening time so-called. Partial sludges are possible, which allow a higher solids concentration in the discharged paste.

Die DE 198 46 535 A offenbart eine Zentrifuge, mit der eine weitgehend verlustfreie Feststoffgewinnung aus einem Schleudergut ermöglicht wird. Dabei wird der von den Zentrifugentrommeln abgetrennte Feststoff in einem Beutel aufgefangen, welcher in ein Behältnis eingesetzt ist, wobei die Zentrifugentrommel in das Innere des Behältnisses sowie in eine obere Öffnung des Beutels ragt. Somit können Feststoffe verlustfrei aus dem Schleudergut aufgefangen werden.The DE 198 46 535 A discloses a centrifuge with which a largely lossless solids extraction is made possible from a centrifuged material. In this case, the separated from the centrifuge drums solid is collected in a bag, which is inserted into a container, the centrifuge drum protrudes into the interior of the container and into an upper opening of the bag. Thus, solids can be collected lossless from the centrifuged.

Die WO 95/21697 offenbart eine Vorrichtung zur zentrifugalen Auftrennung, beispielsweise für die Separierung von Zucker, welche u.a. einen Deflektor aufweist.The WO 95/21697 discloses a device for centrifugal separation, for example for the separation of sugar, which has, inter alia, a deflector.

In letzter Zeit wurde versucht, durch Abziehen des flüssigen Anteils in der Trommel vor der Entleerung eine hochkonzentrierte Paste zu erzeugen und diese durch einen größeren als bisher üblichen steuerbaren Spalt auszutragen.Recently, it has been attempted to produce a highly concentrated paste by stripping off the liquid portion in the drum prior to emptying and discharging it through a larger controllable gap than heretofore.

Die Erfindung setzt nunmehr bei der Aufhabe an, eine selbstaustragende Zentrifuge für die verfahrenstechnische Behandlung hochkonzentrierter Pasten mit einer hängenden Trommel mit zwei oder mehr Austragsschlitzen zu schaffen, welche eine schonende Umlenkung des aus dem Austragsschlitz ausgeschleuderten Feststoffes in einen Auffangbehälter der Zentrifuge ermöglicht.The invention now uses in the Aufrahabe to create a self-discharging centrifuge for the process engineering treatment of highly concentrated pastes with a hanging drum with two or more discharge slots, which allows a gentle deflection of the ejected from the discharge slot solid into a receptacle of the centrifuge.

Systembedingt geschieht der Pastenaustrag unter Zentrifugalbeschleunigung in horizontaler Richtung auf einem kreisförmigen Umfang und könnte in einem ringförmigen Behälter aufgefangen werden. Wünschenswert ist allerdings ein Sammeln der Paste in einem unter der Trommel befindlichen Behälter. Dies ist vorzugsweise bei einer Zentrifugenausführung mit hängender Trommel möglich. Die Paste muss dann von horizontaler Richtung nach unten in den Behälter umgelenkt werden.Due to the system, the paste discharge takes place under centrifugal acceleration in the horizontal direction on a circular circumference and could be collected in an annular container. However, it is desirable to collect the paste in a container located under the drum. This is preferably possible with a centrifuge version with a hanging drum. The paste must then be diverted from the horizontal direction down into the container.

Die Erfindung bezieht sich auf eine Einrichtung, bestehend aus einem Pastenumlenkring und einem damit verbundenen oder lösbaren Pastenbehälter, welcher in der Lage ist, die Paste aus mehreren Trommelentleerungen aufzunehmen. Dieser Ring ist so gestaltet, dass eine Umlenkung mit möglichst geringen Produktverlusten verbunden ist. Gegenstand der Erfindung ist zudem eine selbstaustragende Zentrifuge für die verfahrenstechnische Behandlung hochkonzentrierter Pasten wenigstens bestehend aus einem gegebenenfalls kühlbaren Gehäuse, einer Zuleitung für die Suspension, einer Ableitung für die geklärte Flüssigkeit, einer hängenden mit obenliegendem Antriebsteil verbundenen Trommel mit zwei oder mehr Austragsschlitzen, einem gegebenenfalls vom Gehäuse lösbaren Auffangbehälter und einer Austragseinrichtung für die Paste, dadurch gekennzeichnet, dass die Zentrifuge einen erfindungsgemäßen Umlenkring aufweist.The invention relates to a device consisting of a Pasteumlenkring and a connected or detachable paste container, which is able to receive the paste from several drum emptying. This ring is designed so that a deflection is associated with the lowest possible product losses. The invention furthermore relates to a self-discharging centrifuge for the process-engineering treatment of highly concentrated pastes at least consisting of an optionally coolable housing, a feed line for the suspension, a discharge for the clarified liquid, a suspended drum connected to an overhead drive part with two or more discharge slots, one optionally detachable from the housing collecting container and a discharge device for the paste, characterized in that the centrifuge comprises a deflection ring according to the invention.

Der Umlenkring ist mit einer Mantelkühlung ausgebildet. Der Kühlmantel ist z.B. eine Doppelwand auf dem äußeren Umfang des Umlenkringes, die von einem Wärmetauschermedium durchströmt werden kann.The deflection ring is formed with a jacket cooling. The cooling jacket is e.g. a double wall on the outer circumference of the Umlenkringes, which can be traversed by a heat exchange medium.

Damit wird eine schonende und insbesondere scherungsarme Umlenkung des aus dem Austragsschlitz ausgeschleuderten Feststoffes in den Auffangbehälter der Zentrifuge ermöglicht.Thus, a gentle and, in particular, low-shear deflection of the ejected from the discharge slot solid in the collection container of the centrifuge is possible.

Ein besonderer Umlenkring ist dadurch gekennzeichnet, dass die Innenkontur der Prall wand unmittelbar unterhalb der Aufprallfläche, insbesondere über einen beliebigen Längsschnitt des Umlenkrings gesehen, kreisförmig oder parabelförmig ausgebildet ist.A special deflecting ring is characterized in that the inner contour of the baffle wall is formed immediately below the impact surface, in particular over any longitudinal section of the deflecting ring, circular or parabolic.

Hiermit wird die Umlenkung noch weiter produktschonend ausgebildet und die Scherung weiter herabgesetzt.Hereby, the deflection is made even more gentle on the product and further reduces the shear.

In einer bevorzugten Form ist der Umlenkring so ausgebildet, dass die Prallwand im Bereich unterhalb des Austragsschlitzes eine gekrümmte Innenkontur, im geometrischen Längsschnitt gesehen, mit einem Krümmungsradius von > 20 mm, bevorzugt von 30 bis 50 mm hat.In a preferred form of the deflection ring is formed so that the baffle wall in the region below the Austragsschlitzes a curved inner contour, seen in geometric longitudinal section, having a radius of curvature of> 20 mm, preferably from 30 to 50 mm.

Letztere gekrümmte Wandfläche kann auch entsprechend einer Kurve mit über die Verlaufstrecke veränderlichem Radius gestaltet sein.The latter curved wall surface can also be designed according to a curve with a variable radius over the course of travel.

Die Prallwand des Umlenkringes weist in einer besonders bevorzugten Ausführung im Bereich oberhalb der Öffnungsbreite des Austragsschlitzes einen Anstellwinkel y zur Horizontalen von 3 bis 30°, bevorzugt von 5 bis 15° auf.In a particularly preferred embodiment, the baffle wall of the deflection ring has an angle of attack y to the horizontal of 3 to 30 °, preferably 5 to 15 °, in the region above the opening width of the discharge slot.

Eine bevorzugte Variante des Umlenkringes ist dadurch gekennzeichnet, dass die Tangente der Innenkontur der Prallfläche im Bereich unterhalb der Umlenkkontur des Umlenkrings gegenüber der Vertikalen im geometrischen Längsschnitt gesehen einen Anstellwinkel 3 bis 30°, bevorzugt von 5 bis 15°, aufweist. Die Vertikale ist hierbei parallel zur Rotationsachse der Trommel.A preferred variant of the deflection ring is characterized in that the tangent of the inner contour of the baffle surface in the region below the deflection contour of the deflection ring relative to the vertical in the geometric longitudinal section seen an angle of attack 3 to 30 °, preferably from 5 to 15 °. The vertical is parallel to the axis of rotation of the drum.

Damit wird eine besonders günstige Führung des ausgeschleuderten Produktes in die Richtung der Mitte des Auffangbehälters erreicht.Thus, a particularly favorable guidance of the centrifuged product is achieved in the direction of the center of the collecting container.

Der Umlenkring weist in einer bevorzugten Variante an seinem unteren Ende eine Abrisskante auf, die gegebenenfalls hinterschnitten ist.The deflection ring has in a preferred variant at its lower end a tear-off edge, which is optionally undercut.

Der Umlenkring ist insbesondere einstückig mit einem Auffangbehälter oder besonders bevorzugt trennbar mit dem Auffangbehälter der Zentrifuge verbunden.The deflecting ring is in particular connected in one piece with a collecting container or particularly preferably separably connected to the collecting container of the centrifuge.

In einer bevorzugten Ausführungsform ist die produktberührte Oberfläche des Umlenkrings mit einer gleitfähigen Beschichtung, insbesondere aus PTFE oder Metalllegierungen versehen.In a preferred embodiment, the product-contacting surface of the deflecting ring is provided with a lubricious coating, in particular made of PTFE or metal alloys.

In einer weiteren bevorzugten Variante weist der Umlenkring eine oder mehrere Düsen für das Einsprühen von Flüssig-Stickstoff auf.In a further preferred variant, the deflection ring has one or more nozzles for the injection of liquid nitrogen.

Diese Düsen sind insbesondere auf dem Umfang des Umlenkringes unterhalb der Aufprallfläche, die der Öffnungsbreite des Austragsschlitzes entspricht, verteilt angebracht.These nozzles are in particular distributed on the circumference of the deflection ring below the impact surface, which corresponds to the opening width of the Austragsschlitzes.

Der Auffangbehälter ist bevorzugt zylindrisch nach oder nach unten konisch verengend ausgestaltet.The collecting container is preferably configured cylindrically conically narrowing downwards or downwards.

Die konische Verengung des Auffangbehälters erleichtert den Austrag von z.B. gefrorenem Produkt aus dem Behälter. Die Oberkante des Behälters ist insbesondere so ausgelegt, dass unterhalb der bevorzugt angebrachten Abrisskante des Umlenkringes eine verwirbelungsarme Strömung entsteht.The conical constriction of the collecting container facilitates the discharge of e.g. frozen product from the container. The upper edge of the container is in particular designed so that below the preferably attached spoiler lip of the deflection ring results in a low-flow turbulence.

Die produktberührten Innenflächen des Auffangbehälters sind ebenfalls in einer bevorzugten Ausführung mit einer gleitfähigen Beschichtung, insbesondere aus PTFE oder Metalllegierungen versehen.The product-contacting inner surfaces of the collecting container are also provided in a preferred embodiment with a lubricious coating, in particular of PTFE or metal alloys.

In den Auffangbehälter ist besonders bevorzugt ein Beutel aus flexiblem Material eingelegt, der insbesondere mittels Unterdruck an den Behälterwänden fixierbar ist.In the collecting container, a bag of flexible material is particularly preferably inserted, which can be fixed in particular by means of negative pressure to the container walls.

Geeignete Materialien für den Beutel sind alle Folienkunststoffe, insbesondere Polypropylen, Polyethylen, Polyvinylchlorid.Suitable materials for the bag are all film plastics, in particular polypropylene, polyethylene, polyvinyl chloride.

Der Auffangbehälter ist in einer bevorzugten weiteren Form der Zentrifuge mit einer Temperiereinrichtung, insbesondere mit einer Mantelkühlung ausgebildet.The collecting container is formed in a preferred further form of the centrifuge with a tempering device, in particular with a jacket cooling.

Der Auffangbehälter weist bevorzugt zusätzlich Mittel für einen Transport, insbesondere mittels Flurförder-Einrichtungen auf.The collecting container preferably additionally has means for transport, in particular by means of conveyor devices.

Die obere Öffnung des Auffangbehälters ist besonders bevorzugt als Teilflansch ausgebildet.The upper opening of the collecting container is particularly preferably designed as a partial flange.

Dadurch ist der Auffangbehälter z.B. mit einem Deckel verschließbar und so ausgebildet, dass ein Andocken an andere verfahrenstechnische Vorrichtungen, insbesondere an einen Lösekessel möglich ist.As a result, the collecting container is closable, for example, with a lid and designed so that docking with other procedural devices, in particular a dissolving vessel is possible.

Für den Einsatz im biotechnologischen Bereich, z.B. bei der Separierung von Pasten oder Klärung von Flüssigkeiten in der Humanblut-Plasma-Fraktionierung ist der Auffangbehälter mantelkühlbar ausgeführt.For use in the biotechnological field, e.g. in the separation of pastes or clarification of liquids in the human blood plasma fractionation, the collecting container is designed jacket cooling.

Zur Verbesserung der Kühlwirkung können eine oder mehrere Düsen angebracht sein, durch welche Flüssigstickstoff in den Gasraum in der Nähe der rotierenden Trommel eingebracht werden kann, um die Erwärmung des Austragsraums durch Luftreibung zu unterdrücken.To improve the cooling effect, one or more nozzles may be mounted, through which liquid nitrogen can be introduced into the gas space in the vicinity of the rotating drum in order to suppress the heating of the discharge space by air friction.

Es sind Tellerseparatoren bekannt, die durch Cleaning-In-Place automatisch gereinigt werden können. Hierzu wird der Separator während bestimmter z.T. besonderer Betriebszustände mit verschiedenen Reinigungsflüssigkeiten gespült. Zur Unterstützung der Reinigung können spezielle CIP-Düsen angebracht werden. Beim Design der Bauteile und der Dichtungen zwischen den Bauteilen ist auf eine gute Zugänglichkeit bei der Reinigung zu achten.There are plate separators known that can be cleaned automatically by Cleaning-In-Place. For this purpose, the separator during certain z.T. special operating conditions rinsed with various cleaning fluids. To assist cleaning special CIP nozzles can be attached. When designing the components and the seals between the components, ensure good accessibility during cleaning.

Der Behälter kann aus metallischen oder nicht metallischen Werkstoffen ausgeführt sein. Der Behälter kann lösbar oder unlösbar in einem Gestell angeordnet sein, welches mittels Flurförderfahrzeugen transportiert oder stapelbar ist.The container may be made of metallic or non-metallic materials. The container can be arranged detachably or non-detachably in a frame which is transported or stackable by means of industrial trucks.

Der Behälter kann mit einem Deckel versehen oder mit einem automatischen Öffnungs-Schieber ausgerüstet und zur Beschickung von Lösekesseln geeignet sein.The container can be provided with a lid or equipped with an automatic opening slide and be suitable for loading dissolving boilers.

Der Behälter kann mit einer Anmaisch- oder Aufschmelzvorrichtung ausgerüstet werden, die es gestattet den Inhalt als fließfähige Suspension in den Lösekessel zu fördern.The container can be equipped with a mashing or melting device, which allows the content to be conveyed as a flowable suspension in the dissolving vessel.

Wie auch der Umlenkring kann auch der Behälter z.B. für den Einsatz in der BioTechnologie mantelkühlbar ausgerüstet sein.Like the deflection ring, the container can also be equipped with jacket cooling, eg for use in biotechnology.

Die Erfindung wird nachstehend anhand der Figuren beispielhaft näher erläutert. Es zeigen

Fig. 1
einen Längsschnitt durch eine modifizierte Zentrifuge 1
Fig. 2
ein vergrößertes Detail des Längsschnittes nach Fig. 1
The invention will be explained in more detail by way of example with reference to the figures. Show it
Fig. 1
a longitudinal section through a modified centrifuge. 1
Fig. 2
an enlarged detail of the longitudinal section after Fig. 1

BeispieleExamples

Der Austrag einer biologischen Paste, die bei der Fraktionierung von Humanblut-Plasma anfällt, erfolgt aus einer Zentrifugentrommel 14 mit einem Außendurchmesser von 468 mm bei einer Trommeldrehzahl von 7000 l/min und Umlenkung der Blutplasmapaste durch einen Pastenumlenkring 4. Die Zentrifuge 1 weist einen Antriebsteil 13 zum Antrieb der Trommel 14 mit einer Zuleitung 11 für das Plasma auf. Die Trommel 14 hängt in einem teilbaren Unterteil der Zentrifuge 1, der das Mantelgehäuse 10, mit Zuleitungen 19 und Ableitungen 22 für eine Kühlflüssigkeit und Einspeiseleitungen 9 für flüssigen Stickstoff, den Umlenkring 4 und den Auffangbehälter 7 umfasst. Der Auffangbehälter hat einen Kühlmantel 16 mit Zuleitungen 20 und Ableitungen 21 sowie aufgeschweißte Transportlaschen 18. Die Trommel 14 weist außerdem einen Auslass 12 für die geklärte Flüssigkeit auf. Fig. 2 gibt den Umlenkring 4 im Detail wieder. Die Prallwand 2 des Pastenumlenkrings 4 hat einen Winkel α = 15° (siehe Fig. 2) zur Horizontalen im Bereich des Austragschlitzes 3. Der Winkel γ oberhalb der Öffnungsbreite des Austragsschlitzes 3 ist ebenfalls um 15° gegen die Horizontale geneigt, so dass die Aufprallfläche 8 selbst und der darüberliegende Bereich in der Projektion eine Gerade bilden. Unterhalb der Aufprallfläche wird die ausgetragene Paste durch eine, im Längsschnitt betrachtet, kreisförmige Kontur mit einem Krümmungsradius r von 45° in Richtung Behälterboden des Auffangbehälters 7 umgelenkt. Um die ausgetragenen Feststoffe von der Behälterwand weg in Richtung Bodenmitte zu leiten, ist die anschließende Fläche 19 mit einem Winkel β = 10° gegen die Vertikale geneigt. Der Pastenumlenkring 5 hat an seinem unteren Ende eine Abrisskante 6.The discharge of a biological paste obtained in the fractionation of human blood plasma is carried out from a centrifuge drum 14 with an outer diameter of 468 mm at a drum speed of 7000 l / min and deflection of the blood plasma paste by a Pasteumlenkring 4. The centrifuge 1 has a drive part 13 for driving the drum 14 with a supply line 11 for the plasma. The drum 14 is suspended in a separable lower part of the centrifuge 1, which comprises the jacket housing 10, with feed lines 19 and discharges 22 for a cooling liquid and feed lines 9 for liquid nitrogen, the deflection ring 4 and the collecting container 7. The receptacle has a cooling jacket 16 with leads 20 and leads 21 and welded transport tabs 18. The drum 14 also has an outlet 12 for the clarified liquid. Fig. 2 is the deflection ring 4 in detail again. The baffle 2 of the Pastenumlenkrings 4 has an angle α = 15 ° (see Fig. 2 The angle γ above the opening width of the discharge slot 3 is also inclined by 15 ° to the horizontal, so that the impact surface 8 itself and the overlying area in the projection form a straight line. Below the impact surface, the discharged paste is deflected by a, viewed in longitudinal section, circular contour with a radius of curvature r of 45 ° in the direction of the container bottom of the collecting container 7. In order to direct the discharged solids away from the container wall in the direction of the center of the ground, the adjoining surface 19 is inclined at an angle β = 10 ° to the vertical. The Pasteumlenkring 5 has at its lower end a spoiler edge. 6

Mit dieser Geomertie konnte eine nahezu vollständige Pastenumlenkung erzielt werden. Z.B. wurde nach 2 Austrägen aus der Zentrifugentrommel 98,3 % der ausgetragenen Feststoffmasse in dem darunter befindlichen Auffangbehälter 7 gefunden und nur 1,7 % auf der Oberfläche des Umlenkrings. Ein weiterer Versuch mit einer anderen biologischen Paste ergab nach 6 Austrägen eine Feststoffmasse im Auffangbehälter von 99,5 % und entsprechend einem Verlust von 0,5 % auf der Oberfläche des Pastenumlenkrings.With this Geomertie an almost complete paste deflection could be achieved. For example, after 2 discharges from the centrifuge drum, 98.3% of the solid mass discharged was found in the collection container 7 located underneath, and only 1.7% on the surface of the deflection ring. Another experiment with another biological paste yielded a solid mass after 6 discharges Tray of 99.5% and corresponding to a loss of 0.5% on the surface of the paste deflecting ring.

Claims (15)

  1. Self-discharging centrifuge for the process engineering treatment of highly concentrated pastes, comprising an optionally coolable housing (10), a feed line (11) for the suspension, a discharge line (12) for the clarified liquid, a suspended drum (14), which is connected to a drive part (13) at the top and has two or more discharge slots (3), and a collection vessel (7), the centrifuge further including a paste deflector ring having an annular impact wall (2), characterized in that a setting angle α of the tangent of the impact wall (2) of the deflector ring (4) positioned opposite the discharge slots with respect to the horizontal is from 3 to 60° as seen over the entire opening width of the discharge slot (3) and that the deflector ring is provided with jacket cooling (8).
  2. Self-discharging centrifuge according to Claim 1, characterized in that the inner contour of the impact wall (2) immediately below the impact surface, in particular as seen over any desired longitudinal section through the paste deflector ring (4), is of circular or parabolic design.
  3. Self-discharging centrifuge according to Claim 2, characterized in that the impact wall (2), in the region below the discharge slot (3), has a curved inner contour, as seen in geometric longitudinal section, with a radius of curvature of >20 mm, preferably of 30 to 50 mm.
  4. Self-discharging centrifuge according to one of Claims 1 to 3, characterized in that the impact wall (2), in the region above the opening width of the discharge slot (3), has a setting angle with respect to the horizontal of 3 to 30°, preferably of 5 to 15°.
  5. Self-discharging centrifuge according to one of Claims 1 to 4, characterized in that the tangent of the inner contour of the impact surface (5), in the region below the deflecting contour of the paste deflector ring (4), has a setting angle β of up to 30°, preferably from 5 to 15°, with respect to the vertical, as seen in geometric longitudinal section.
  6. Self-discharging centrifuge according to one of Claims 1 to 5, characterized in that the paste deflector ring (4), at its lower end, has a detachment edge (6) which may be undercut.
  7. Self-discharging centrifuge according to one of Claims 1 to 6, characterized in that the paste deflector ring (4) is integral with a collection vessel or is detachably connected to the collection vessel (7) of the centrifuge (1).
  8. Self-discharging centrifuge according to one of Claims 1 to 7, characterized in that the surface of the paste deflector ring (4) which comes into contact with product is provided with a coating with sliding properties, in particular made from PTFE or metal alloys.
  9. Self-discharging centrifuge according to one of Claims 1 to 8, characterized in that the paste deflector ring (4) has one or more nozzles (9) for spraying in liquid nitrogen.
  10. Self-discharging centrifuge according to one of Claims 1 to 9, characterized in that the collection vessel (7) is designed to be cylindrical or to taper conically toward the bottom.
  11. Self-discharging centrifuge according to one of Claims 1 to 10, characterized in that the inner surfaces of the collection vessel (7) which come into contact with product are provided with a coating with sliding properties, in particular made from PTFE or metal alloys.
  12. Self-discharging centrifuge according to one of Claims 1 to 11, characterized in that a bag (17) made from flexible material is inserted into the collection vessel (7) and can be fixed to the vessel walls, in particular by means of a pressure reduction.
  13. Self-discharging centrifuge according to one of Claims 1 to 12, characterized in that the collection vessel (7) is designed with a temperature-control device (16), in particular with jacket cooling.
  14. Self-discharging centrifuge according to one of Claims 1 to 13, characterized in that the collection vessel (7) additionally has means (18) for transporting it, in particular by means of floor conveyor devices.
  15. Self-discharging centrifuge according to one of Claims 1 to 14, characterized in that the upper opening of the collection vessel (7) is formed as a partial flange.
EP02747462.6A 2001-07-19 2002-07-08 Deviation ring for a self-distributing centrifuge Expired - Lifetime EP1414582B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10135317 2001-07-19
DE10135317A DE10135317A1 (en) 2001-07-19 2001-07-19 Deflection ring for a self-discharging centrifuge
PCT/EP2002/007563 WO2003008105A1 (en) 2001-07-19 2002-07-08 Deviation ring for a self-distributing centrifuge

Publications (3)

Publication Number Publication Date
EP1414582A1 EP1414582A1 (en) 2004-05-06
EP1414582B1 true EP1414582B1 (en) 2010-03-10
EP1414582B2 EP1414582B2 (en) 2016-07-20

Family

ID=7692447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02747462.6A Expired - Lifetime EP1414582B2 (en) 2001-07-19 2002-07-08 Deviation ring for a self-distributing centrifuge

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US (1) US7204795B2 (en)
EP (1) EP1414582B2 (en)
JP (1) JP4301939B2 (en)
CN (1) CN1290622C (en)
AT (1) ATE460229T1 (en)
CA (1) CA2453975C (en)
DE (2) DE10135317A1 (en)
DK (1) DK1414582T4 (en)
HK (1) HK1069141A1 (en)
WO (1) WO2003008105A1 (en)

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US20040176233A1 (en) 2004-09-09
DE50214269D1 (en) 2010-04-22
CN1290622C (en) 2006-12-20
ATE460229T1 (en) 2010-03-15
HK1069141A1 (en) 2005-05-13
DE10135317A1 (en) 2003-01-30
JP2004534652A (en) 2004-11-18
DK1414582T4 (en) 2016-11-14
JP4301939B2 (en) 2009-07-22
US7204795B2 (en) 2007-04-17
DK1414582T3 (en) 2010-06-21
CA2453975C (en) 2010-01-26
EP1414582B2 (en) 2016-07-20
CN1533307A (en) 2004-09-29
WO2003008105A1 (en) 2003-01-30
CA2453975A1 (en) 2003-01-30
EP1414582A1 (en) 2004-05-06

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