EP0640398A2 - Centrifuge - Google Patents
Centrifuge Download PDFInfo
- Publication number
- EP0640398A2 EP0640398A2 EP94112821A EP94112821A EP0640398A2 EP 0640398 A2 EP0640398 A2 EP 0640398A2 EP 94112821 A EP94112821 A EP 94112821A EP 94112821 A EP94112821 A EP 94112821A EP 0640398 A2 EP0640398 A2 EP 0640398A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- peeling
- centrifuge
- liquid
- channel
- drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- 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
- B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
- B04B11/082—Skimmers for discharging liquid
-
- 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
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
-
- 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
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
- B04B2001/2083—Configuration of liquid outlets
Definitions
- the invention is directed to a centrifuge, in particular to a screw centrifuge, for the separation of liquid-solid mixtures, consisting of a centrifuge drum which is rotatably mounted about its longitudinal axis, with means for feeding the mixture to be separated into the centrifuge drum, with openings in the Centrifuge drum for the discharge of the separated heavy substances (solid) and with a peeling disc for the discharge of the light substances (liquid) from the centrifuge drum, wherein the peeling disc has at least one peeling channel which extends from the periphery of the peeling disc to the center of the peeling disc in one leads in the axial direction discharge channel.
- the focus is on dewatering the solid as a preliminary stage to thermal drying.
- the liquid phase flows out of the centrifuge over the weir plates of the centrifuge at high circumferential speed, during which a strong turbulence occurs with the gas (normally air) present in the centrifuge.
- each peeling channel is assigned a discharge channel, the effective cross section of which can be changed by means of a throttle body.
- the liquid volume flow discharged through the peeling channels can thus be regulated and adapted to the inlet quantities, so that it is ensured that the entry opening of the peeling channels always remain within the liquid.
- turbulence can continue to arise within the peeling channels, combined with the suction of gas (air), even with strong throttling behind the peeling disc and thus a small volume flow within the peeling channels.
- This has the advantage over the throttling behind the peeling disc, that the inlet cross-section is always adapted to the volume flow to be discharged and is not larger than necessary.
- the peeling channel is according to the invention in the direction of drum rotation, i. H. Crescent-shaped in the direction of liquid rotation and runs divergently from the inlet area on the periphery of the peeling disk to the outlet area in the center of the peeling disk. H. its cross-sectional area increases.
- the cross-sectional area ratio of the inlet area to the outlet area is advantageously less than 1, preferably less than 0.1.
- the inventive design of the peeling channel not only advantageously adapts the liquid volume flow to the quantity to be discharged with the aim that the inlet opening of the peeling channel is always immersed in the liquid and no gas (air) is sucked into the peeling channel, but rather in the liquid-containing kinetic energy is converted into potential energy in a soft course with high efficiency and liquid shocks and cavitation are largely suppressed by avoiding turbulence.
- the partial disks forming the peeling disks are advantageously arranged on tubes which are inserted into one another and which are guided axially from the outside into the centrifuge drum and can be rotated relative to one another from the outside. In this way, it is possible to change the cross-section of the peeling channel in a simple manner from the outside, even during operation of the centrifuge, by rotating the tubes, and thus to adapt the peeling channel to fluctuating operating states of the centrifuge.
- the inner tube is at the same time also the feed tube through which the mixture to be separated is fed into the centrifuge drum from the outside.
- Fig. 1 shows a screw centrifuge (10) with an elongated centrifuge drum (11) and a coaxial inside the centrifuge drum (11) rotating screw conveyor (12), with solids discharge openings (13) at the end of the conical part of the centrifuge drum (11) and with a peeling disc (14) arranged at the opposite end of the centrifuge drum (11) for discharging the liquid.
- the peeling disc (14) is formed from two individual discs (15, 16) which are arranged at a distance from one another on tubes (17, 24) which are inserted into one another, so that there is between the individual discs (15, 16) forms a gap.
- the individual disks (15, 16) have inner disks (18, 19) screwed on, which, due to their geometry (crescent-shaped contour) and arrangement on the individual disks, have a radial distance from one another and the gap formed by the individual disks (15, 16) partially fill out.
- These inner disks (18, 19) form the peeling channel (20) in connection with the individual disks (15, 16), which runs from the periphery of the peeling disk to the center of the peeling disk (14).
- the dimension of the peeling disc (20) is constant in the axial direction and corresponds to the distance between the individual discs (15, 16). In the radial direction, the dimension of the The peeling channel (20) is determined by the radial distance between the inner disks (18, 19), the crescent-shaped curvature of the two inner disks (18, 19) being designed so that the peeling channel (20) from the periphery of the peeling disk (14) to it Center wider and thus the cross section of the peeling channel (14) is constantly increasing.
- the individual disks (15, 16) forming the peeling disk (14) are placed on each of the nested tubes (17, 24) - in the exemplary embodiment shown, the single disk (15) on the tube (17) and the single disk (16) on the tube (24) - and firmly connected to them, for example by welding.
- the two nested pipes (17, 24) form a discharge channel (22) between them, which is connected to the peeling channel (20) and which functions - the discharge of the liquid - even when the pipes (17, 24) are rotated against each other maintains and is led out of the centrifuge drum (11) with the two tubes (17, 24).
- the tubes (17, 24) leading from the outside into the centrifuge drum (11) - the inner tube (17) serves as a feed tube for feeding the suspension to be separated in the direction of arrow 23 into the centrifuge drum (11) - can be rotated relative to one another from the outside and thus also the individual disks (15, 16) attached to the pipe reels (17, 24), whereby the radial distance of the inner disks (18, 19) arranged on individual disks (15, 16) and thus the cross section of the peeling channel (20) changes.
- the peeling disc (19) described in this exemplary embodiment consists of a total of four parts, the two individual discs (15, 16) on each of the inner discs (18, 19), the base area of which corresponds to approximately half of the one individual disc (15, 16) , is attached.
- Such a peeling disc (14) can be produced with simple means, in particular the shape of the peeling channel can be adapted to the requirements of the liquid to be discharged by simply replacing the inner discs (18, 19) with correspondingly differently shaped inner discs.
- the inner disks it is also possible to use more than two inner disks, the inner disks then being able to be arranged axially or radially next to one another. According to the invention, it is also possible to dispense entirely with the inner panes. In this latter case, the peeling channel contours must then be machined out of the individual disks by a metalworking process, for example by milling.
Landscapes
- Centrifugal Separators (AREA)
Abstract
Description
Die Erfindung ist auf eine Zentrifuge gerichtet, insbesondere auf eine Schneckenzentrifuge, für die Trennung von Flüssigkeits-Feststoffgemischen, bestehend aus einer Zentrifugentrommel, die um ihre Längsachse drehbar gelagert ist, mit Einrichtungen zum Zuführen des zu trennenden Gemisches in die Zentrifugentrommel, mit Öffnungen in der Zentrifugentrommel für den Austrag der abgetrennten schweren Stoffe (Feststoff) und mit einer Schälscheibe für den Austrag der leichten Stoffe (Flüssigkeit) aus der Zentrifugentrommel, wobei die Schälscheibe mindestens einen Schälkanal aufweist, der von der Peripherie der Schälscheibe ausgehend zum Zentrum der Schälscheibe zu einem in axialer Richtung verlaufenden Ableitkanal führt.The invention is directed to a centrifuge, in particular to a screw centrifuge, for the separation of liquid-solid mixtures, consisting of a centrifuge drum which is rotatably mounted about its longitudinal axis, with means for feeding the mixture to be separated into the centrifuge drum, with openings in the Centrifuge drum for the discharge of the separated heavy substances (solid) and with a peeling disc for the discharge of the light substances (liquid) from the centrifuge drum, wherein the peeling disc has at least one peeling channel which extends from the periphery of the peeling disc to the center of the peeling disc in one leads in the axial direction discharge channel.
Bei vielen Trennaufgaben in einer Zentrifuge steht die Entwässerung des Feststoffes als Vorstufe zu einer thermischen Trocknung im Vordergrund. Die flüssige Phase strömt über die Wehrplatten der Zentrifuge mit hoher Umfangsgeschwindigkeit aus der Zentrifuge, dabei tritt eine starke Verwirbelung mit dem in der Zentrifuge vorhandenem Gas (normalerweise Luft) auf.For many separation tasks in a centrifuge, the focus is on dewatering the solid as a preliminary stage to thermal drying. The liquid phase flows out of the centrifuge over the weir plates of the centrifuge at high circumferential speed, during which a strong turbulence occurs with the gas (normally air) present in the centrifuge.
Bei Trennaufgaben, die die flüssige Phase als Wertstoff haben, kann diese Verwirbelung zu starker Schaumbildung und/oder infolge des intensiven möglichen Stoffaustausches zu einer verstärkten Reaktion der Flüssigkeit mit dem Gas führen, was in der Regel unerwünscht ist. Deshalb wird bei diesen Trennaufgaben die Flüssigkeit nicht über Wehrplatten geleitet, sondern mit einer Schälscheibe aus der Zentrifuge gefördert. Die Flüssigkeit wird hierbei durch ihre hohe, der Trommeldrehzahl entsprechenden Umfangsgeschwindigkeit in die Kanäle der stillstehenden Schälscheibe und von dort über axiale Ableitkanäle aus der Zentrifuge gedrückt. Damit bei diesem Austragsvorgang kein Gas in die Kanäle der Schälscheibe gedrückt wird, was ebenfalls zu einer Schaumbildung führen wurde, ist es erforderlich, daß sich die Kanalöffnungen der Schälscheibe stets innerhalb der Flüssigkeil befindet, d. h. die Austragsmenge der Flüssigkeit ist der Menge des zugefügten Gemisches anzupassen.In separation tasks which have the liquid phase as a valuable substance, this turbulence can lead to excessive foaming and / or, as a result of the intensive possible exchange of substances, to an increased reaction of the liquid with the gas, which is generally undesirable. Therefore, in these separation tasks, the liquid is not passed over weir plates, but is conveyed out of the centrifuge with a peeling disc. Due to its high peripheral speed, which corresponds to the drum speed, the liquid is pressed into the channels of the stationary peeling disc and from there via axial discharge channels out of the centrifuge. So that no gas is pressed into the channels of the peeling disc during this discharge process, which would also lead to foam formation, it is necessary that the channel openings of the peeling disc are always within the liquid wedge, ie the discharge quantity of the liquid is to be adjusted to the quantity of the mixture added .
Aus der DE-PS 38 33 063 ist eine Schälscheibe für Schleudertrommeln bekannt, bei der jedem Schälkanal ein Ableitkanal zugeordnet ist, der mittels eines Drosselkörpers in seinem wirksamen Querschnitt verändert werden kann. Mit Hilfe dieser Drosselkörper kann somit der durch die Schälkanäle ausgetragene Flüssigkeitsvolumenstrom geregelt und den Einlaufmengen angepaßt werden, so daß sichergestellt ist, daß die Eintragsöffnung der Schälkanäle stets innerhalb der Flüssigkeit bleiben. Trotzdem können infolge der hohen Geschwindigkeit, mit der die Flüssigkeit an der Schälscheibe vorbeiströmt, innerhalb der Schälkanäle weiterhin Turbulenzen entstehen, verbunden mit einem Einsaugen von Gas (Luft), selbst bei starker Drosselung hinter der Schälscheibe und damit kleinem Volumenstrom innerhalb der Schälkanäle.From DE-PS 38 33 063 a peeling disc for centrifugal drums is known in which each peeling channel is assigned a discharge channel, the effective cross section of which can be changed by means of a throttle body. With the help of these throttle bodies, the liquid volume flow discharged through the peeling channels can thus be regulated and adapted to the inlet quantities, so that it is ensured that the entry opening of the peeling channels always remain within the liquid. Nevertheless, due to the high speed at which the liquid flows past the peeling disc, turbulence can continue to arise within the peeling channels, combined with the suction of gas (air), even with strong throttling behind the peeling disc and thus a small volume flow within the peeling channels.
Es ist Aufgabe der Erfindung, eine Zentrifuge, insbesondere eine Schneckenzentrifuge, mit einer Schälscheibe so auszubilden, daß eine Reduzierung und Minimierung der Schaumbildung beim Austrag der Flüssigkeit aus der Zentrifuge erreicht wird.It is an object of the invention to design a centrifuge, in particular a screw centrifuge, with a peeling disc in such a way that a reduction and minimization of foam formation when the liquid is discharged from the centrifuge is achieved.
Diese Aufgabe wird gelöst mit den Maßnahmen des Kennzeichnungsteils des Anspruchs 1. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved with the measures of the characterizing part of claim 1. Advantageous refinements of the invention are specified in the subclaims.
Durch die Maßnahme der Erfindung, den Schälkanal durch gegeneinander verdrehbare Einzelscheiben auszubilden, wobei durch Verdrehung der Einzelscheiben der wirksame Querschnitt des Schälkanals verändert werden kann, ist die Möglichkeit gegeben, den auszutragenden Flüssigkeitsvolumenstrom durch Veränderung der Schälkanalquerschnittsfläche zu drosseln, wobei einer kleinen Querschnittsfläche des Schälkanals im Einlaufbereich auch ein kleiner auszutragender Flüssigkeitsvolumenstrom entspricht und umgekehrt. Dies hat den Vorteil gegenüber der Drosselung hinter der Schälscheibe, daß der Einlaufquerschnitt stets dem auszutragenden Volumenstrom angepaßt ist und nicht größer ist als notwendig.The measure of the invention to form the peeling channel by means of individual disks which can be rotated relative to one another, the effective cross section of the peeling channel being able to be changed by twisting the individual disks, the possibility is provided of throttling the liquid volume flow to be discharged by changing the peeling channel cross-sectional area, with a small cross-sectional area of the peeling channel in Inlet area also corresponds to a small liquid volume flow to be discharged and vice versa. This has the advantage over the throttling behind the peeling disc, that the inlet cross-section is always adapted to the volume flow to be discharged and is not larger than necessary.
Um die mit hoher Umfangsgeschwindigkeit umlaufende Flüssigkeit (bis etwa 50 m/s) auf eine für Rohrleitungen sinnvolle Geschwindigkeit herunterzudrosseln (ca. 2 bis 4 m/s) und dabei die kinetische Energie der Flüssigkeit mit hohem Wirkungsgrad d. h. ohne hohem Druckverlust in potentielle Energie (Druck) umzuwandeln, ist der Schälkanal erfindungsgemäß in Trommeldrehrichtung, d. h. in Flüssigkeitsdrehrichtung sichelförmig gekrümmt ausgebildet und verläuft vom Einlaufbereich an der Peripherie der Schälscheibe zum Auslaufbereich im Zentrum der Schälscheibe divergent, d. h. seine Querschnittsfläche vergrößert sich. Erfindungsgemäß ist hierbei mit Vorteil das Querschnittsflächenverhältnis vom Einlaufbereich zum Auslaufbereich kleiner 1, vorzugsweise kleiner 0,1.In order to throttle down the liquid circulating at high peripheral speed (up to about 50 m / s) to a speed that is reasonable for pipelines (approx. 2 to 4 m / s) and thereby reduce the kinetic energy of the liquid with high efficiency d. H. To convert into potential energy (pressure) without high pressure loss, the peeling channel is according to the invention in the direction of drum rotation, i. H. Crescent-shaped in the direction of liquid rotation and runs divergently from the inlet area on the periphery of the peeling disk to the outlet area in the center of the peeling disk. H. its cross-sectional area increases. According to the invention, the cross-sectional area ratio of the inlet area to the outlet area is advantageously less than 1, preferably less than 0.1.
Durch die erfindungsgemäße Gestaltung des Schälkanals wird nicht nur mit Vorteil eine optimale Anpassung des Flüssigkeitsvolumenstroms an die auszutragende Menge erreicht mit dem Ziel, daß die Einlauföffnung des Schälkanals stets in der Flüssigkeit eintaucht und kein Gas (Luft) in den Schälkanal gesaugt wird, sondern die in der Flüssigkeit enthaltende kinetische Energie in einem weichen Verlauf mit hohem Wirkungsgrad in potentielle Energie umgewandelt und Flüssigkeitsstöße und Kavitation durch Vermeidung von Turbulenzen weitgehend unterdrückt.The inventive design of the peeling channel not only advantageously adapts the liquid volume flow to the quantity to be discharged with the aim that the inlet opening of the peeling channel is always immersed in the liquid and no gas (air) is sucked into the peeling channel, but rather in the liquid-containing kinetic energy is converted into potential energy in a soft course with high efficiency and liquid shocks and cavitation are largely suppressed by avoiding turbulence.
Mit Vorteil sind gemäß der Erfindung die die Schälscheiben bildenden Teilscheiben auf ineinander gesteckte Rohre angeordnet, die axial von außen in die Zentrifugentrommel hineingeführt sind und von außen gegeneinander verdrehbar sind. Auf diese Weise wird es möglich, von außen auch während des Betriebes der Zentrifuge durch Verdrehen der Rohre in einfacher Weise den Schälkanal in seinem Querschnitt zu verändern und so den Schälkanal schwankenden Betriebszuständen der Zentrifuge anzupassen.According to the invention, the partial disks forming the peeling disks are advantageously arranged on tubes which are inserted into one another and which are guided axially from the outside into the centrifuge drum and can be rotated relative to one another from the outside. In this way, it is possible to change the cross-section of the peeling channel in a simple manner from the outside, even during operation of the centrifuge, by rotating the tubes, and thus to adapt the peeling channel to fluctuating operating states of the centrifuge.
In konstruktiv einfacher Weise ist mit Vorteil gemäß der Erfindung hierbei das innere Rohr gleichzeitig auch das Aufgaberohr, durch das das zu trennende Gemisch von außen in die Zentrifugentrommel hinein aufgegeben wird.In a structurally simple manner, according to the invention, the inner tube is at the same time also the feed tube through which the mixture to be separated is fed into the centrifuge drum from the outside.
Weitere Vorteile, Einzelheiten und Merkmale der Erfindung werden anhand von schematischen Zeichnungsfiguren an einem Ausführungsbeispiel nachfolgende näher erläutert:
Es zeigen
- Fig. 1:
- einen schematischen Axialschnitt durch eine Schneckenzentrifuge mit einer erfindungsgemäßen Schälscheibe;
- Fig. 2:
- einen schematischen Axialschnitt in vergrößertem Maßstab durch eine Schälscheibe gemäß der Erfindung;
- Fig. 3:
- einen Radialschnitt entsprechend der Linie III-III der Fig. 2.
Show it
- Fig. 1:
- a schematic axial section through a screw centrifuge with a peeling disc according to the invention;
- Fig. 2:
- a schematic axial section on an enlarged scale through a peeling disc according to the invention;
- Fig. 3:
- a radial section along the line III-III of FIG. 2nd
Die Fig. 1 zeigt eine Schneckenzentrifuge (10) mit einer länglich umlaufenden Zentrifugentrommel (11) und einer koaxial innerhalb der Zentrifugentrommel (11) umlaufenden Förderschnecke (12), mit Feststoffaustragsöffnungen (13) am Ende des konischen Teils der Zentrifugentrommel (11) und mit einer am entgegengesetzten Ende der Zentrifugentrommel (11) angeordnete Schälscheibe (14) zum Austrag der Flüssigkeit.Fig. 1 shows a screw centrifuge (10) with an elongated centrifuge drum (11) and a coaxial inside the centrifuge drum (11) rotating screw conveyor (12), with solids discharge openings (13) at the end of the conical part of the centrifuge drum (11) and with a peeling disc (14) arranged at the opposite end of the centrifuge drum (11) for discharging the liquid.
Wie insbesondere die Fig. 2 zeigt, wird die Schälscheibe (14) aus zwei Einzelscheiben (15, 16) gebildet, die mit Abstand voneinander auf ineinandergesteckte Rohre (17, 24) angeordnet sind, so daß sich zwischen den Einzelscheiben (15, 16) ein Spalt ausbildet.As shown in FIG. 2 in particular, the peeling disc (14) is formed from two individual discs (15, 16) which are arranged at a distance from one another on tubes (17, 24) which are inserted into one another, so that there is between the individual discs (15, 16) forms a gap.
Innen sind an die Einzelscheiben (15, 16) Innenscheiben (18, 19) angeschraubt` die aufgrund ihrer Geometrie (sichelförmig gekrümmte Kontur) und Anordnung auf den Einzelscheiben einen radialen Abstand voneinander haben und die den aus den Einzelscheiben (15, 16) gebildeten Spalt teilweise ausfüllen.Inside, the individual disks (15, 16) have inner disks (18, 19) screwed on, which, due to their geometry (crescent-shaped contour) and arrangement on the individual disks, have a radial distance from one another and the gap formed by the individual disks (15, 16) partially fill out.
Durch diese Innenscheiben (18, 19) wird in Verbindung mit den Einzelscheiben (15, 16) der Schälkanal (20) gebildet, der von der Peripherie der Schälscheibe zum Zentrum der Schälscheibe (14) verläuft. Die Abmessung der Schälscheibe (20) ist in axialer Richtung dabei konstant und entspricht dem Abstand der Einzelscheiben (15, 16) voneinander. In radialer Richtung wird die Abmessung des Schälkanals (20) durch den radialen Abstand der Innenscheiben (18, 19) voneinander bestimmt, wobei die sichelförmige Krümmung der beiden Innenscheiben (18, 19) so ausgeführt ist, daß der Schälkanal (20) von der Peripherie der Schälscheibe (14) zu ihrem Zentrum hin breiter und somit der Querschnitt des Schälkanals (14) stetig größer wird.These inner disks (18, 19) form the peeling channel (20) in connection with the individual disks (15, 16), which runs from the periphery of the peeling disk to the center of the peeling disk (14). The dimension of the peeling disc (20) is constant in the axial direction and corresponds to the distance between the individual discs (15, 16). In the radial direction, the dimension of the The peeling channel (20) is determined by the radial distance between the inner disks (18, 19), the crescent-shaped curvature of the two inner disks (18, 19) being designed so that the peeling channel (20) from the periphery of the peeling disk (14) to it Center wider and thus the cross section of the peeling channel (14) is constantly increasing.
Die die Schälscheibe (14) bildenden Einzelscheiben (15, 16) sind auf je einem der ineinandergesteckten Rohre (17, 24) aufgesteckt - im dargestellten Ausführungsbeispiel die Einzelscheibe (15) auf das Rohr (17) und die Einzelscheibe (16) auf das Rohr (24) - und mit diesen fest verbunden, beispielsweise durch Verschweissen.The individual disks (15, 16) forming the peeling disk (14) are placed on each of the nested tubes (17, 24) - in the exemplary embodiment shown, the single disk (15) on the tube (17) and the single disk (16) on the tube (24) - and firmly connected to them, for example by welding.
Die beiden ineinandergesteckten Rohre (17, 24) bilden zwischen sich einen Ableitkanal (22) aus, der mit dem Schälkanal (20) in Verbindung steht und der seine Funktion - den Austrag der Flüssigkeit - auch bei Verdrehung der Rohre (17, 24) gegeneinander beibehält und mit den beiden Rohren (17, 24) aus der Zentrifugentrommel (11) herausgeführt wird. Die von außen in die Zentrifugentrommel (11) hineinführenden Rohre (17, 24) - das innere Rohr (17) dient als Aufgaberohr zur Zuführung der zu trennenden Suspension in Pfeilrichtung 23 in die Zentrifugentrommel (11) - sind gegeneinander von außen her verdrehbar und damit auch die auf den Rohrren (17, 24) aufgesteckten Einzelscheiben (15, 16), wodurch sich der radiale Abstand der auf Einzelscheiben (15, 16) angeordneten Innenscheiben (18, 19) und damit der Querschnitt des Schälkanals (20) verändert.The two nested pipes (17, 24) form a discharge channel (22) between them, which is connected to the peeling channel (20) and which functions - the discharge of the liquid - even when the pipes (17, 24) are rotated against each other maintains and is led out of the centrifuge drum (11) with the two tubes (17, 24). The tubes (17, 24) leading from the outside into the centrifuge drum (11) - the inner tube (17) serves as a feed tube for feeding the suspension to be separated in the direction of
Die in diesem Ausführungsbeispiel beschriebene Schälscheibe (19) besteht aus insgesamt vier Teilen, den zwei Einzelscheiben (15, 16) auf die jeweils eine der Innenscheiben (18, 19), deren Basisfläche jeweils etwa der Hälfte der einen Einzelscheibe (15, 16) entspricht, befestigt ist. Eine derartig zusammengesetzte Schälscheibe (14) läßt sich mit einfachen Mitteln herstellen, insbesondere kann durch einfaches Auswechseln der Innenscheiben (18, 19) durch entsprechend anders geformte Innenscheiben die Form des Schälkanals den Erfordernissen der auszutragenden Flüssigkeit angepaßt werden.The peeling disc (19) described in this exemplary embodiment consists of a total of four parts, the two individual discs (15, 16) on each of the inner discs (18, 19), the base area of which corresponds to approximately half of the one individual disc (15, 16) , is attached. Such a peeling disc (14) can be produced with simple means, in particular the shape of the peeling channel can be adapted to the requirements of the liquid to be discharged by simply replacing the inner discs (18, 19) with correspondingly differently shaped inner discs.
Es ist gemäß der Erfindung jedoch auch möglich, mehr als zwei Innenscheiben zu verwenden, wobei die Innenscheiben dann axial oder radial nebeneinander angeordnet sein können. Es ist gemäß der Erfindung weiterhin auch möglich, auf die Innenscheiben in Gänze zu verzichten. In diesem letzteren Fall müssen dann die Schälkanalkonturen aus den Einzelscheiben durch einen Metallbearbeitungsvorgang, beispielsweise durch Fräsen herausgearbeitet werden.According to the invention, however, it is also possible to use more than two inner disks, the inner disks then being able to be arranged axially or radially next to one another. According to the invention, it is also possible to dispense entirely with the inner panes. In this latter case, the peeling channel contours must then be machined out of the individual disks by a metalworking process, for example by milling.
Claims (7)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4328369 | 1993-08-25 | ||
| DE19934328369 DE4328369A1 (en) | 1993-08-25 | 1993-08-25 | centrifuge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0640398A2 true EP0640398A2 (en) | 1995-03-01 |
| EP0640398A3 EP0640398A3 (en) | 1995-05-31 |
Family
ID=6495844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94112821A Withdrawn EP0640398A3 (en) | 1993-08-25 | 1994-08-17 | Centrifuge. |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0640398A3 (en) |
| JP (1) | JPH07163907A (en) |
| DE (1) | DE4328369A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5800332A (en) * | 1996-07-03 | 1998-09-01 | Hensley; Gary L. | Decanting centrifuge employing elements with differing rates of rotation |
| US5971907A (en) * | 1998-05-19 | 1999-10-26 | Bp Amoco Corporation | Continuous centrifugal separator with tapered internal feed distributor |
| WO2000041813A1 (en) * | 1999-01-11 | 2000-07-20 | Westfalia Separator Ag | Centrifuge comprising two stripping discs |
| WO2003024606A1 (en) * | 2001-09-05 | 2003-03-27 | Westfalia Separator Ag | Skimmer device for discharging liquid from a centrifugal drum |
| US6986733B2 (en) * | 2001-10-02 | 2006-01-17 | Westfalia Separator Industry Gmbh | Solid bowl helical conveyor centrifuge with a pressurized housing |
| US7056273B2 (en) * | 2002-05-29 | 2006-06-06 | Westfalia Separator Ag | Solid bowl screw centrifuge comprising a peeling disk, and method for the operation thereof |
| US7255670B2 (en) * | 2004-03-04 | 2007-08-14 | Hutchison Hayes, L.P. | Three phase decanter centrifuge |
| US7510519B2 (en) * | 2003-08-08 | 2009-03-31 | Westfalia Separator Ag | Solid bowl screw centrifuge comprising a centripetal pump with a throtting device |
| US20100041535A1 (en) * | 2006-02-10 | 2010-02-18 | Westfalia Separator Ag | Solid-bowl screw centrifuge and process for its operation |
| US20140341714A1 (en) * | 2013-04-23 | 2014-11-20 | Andritz Frautech S.R.L. | Device For Drawing Off Fluid Of A Centrifugation Device |
| DE102018114843A1 (en) * | 2018-03-21 | 2019-09-26 | Gea Mechanical Equipment Gmbh | Centrifuge with a paring disc |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB494211A (en) * | 1936-12-10 | 1938-10-21 | Separator Ab | Improvements in paring or skimming devices for centrifugal separators |
| EP0068869A2 (en) * | 1981-06-30 | 1983-01-05 | Alfa-Laval Separation A/S | A centrifuge with a skimmer disc for discharging a liquid phase |
| DE3936150A1 (en) * | 1988-12-07 | 1990-06-13 | Nagema Veb K | Skimmer disc for centrifugal separator - has peripheral intersection of entry channel inner flank and evolvent-shaped external surface located at largest dia. of disc |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1942490U (en) * | 1966-03-08 | 1966-07-14 | Flottweg Motoren Werk Dr Georg | FULL CASE CENTRIFUGE WITH A SCREEN DISC. |
| DE3518885A1 (en) * | 1985-05-25 | 1986-11-27 | Bayer Ag, 5090 Leverkusen | FULL-COVERED SCREW CENTRIFUGE WITH RECHARGEING DEVICE |
| DE3833063C1 (en) * | 1988-09-29 | 1989-10-05 | Westfalia Separator Ag, 4740 Oelde, De | Skimming disc for discharging fluids from centrifuge drums |
-
1993
- 1993-08-25 DE DE19934328369 patent/DE4328369A1/en not_active Withdrawn
-
1994
- 1994-08-17 EP EP94112821A patent/EP0640398A3/en not_active Withdrawn
- 1994-08-25 JP JP22428094A patent/JPH07163907A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB494211A (en) * | 1936-12-10 | 1938-10-21 | Separator Ab | Improvements in paring or skimming devices for centrifugal separators |
| EP0068869A2 (en) * | 1981-06-30 | 1983-01-05 | Alfa-Laval Separation A/S | A centrifuge with a skimmer disc for discharging a liquid phase |
| DE3936150A1 (en) * | 1988-12-07 | 1990-06-13 | Nagema Veb K | Skimmer disc for centrifugal separator - has peripheral intersection of entry channel inner flank and evolvent-shaped external surface located at largest dia. of disc |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5800332A (en) * | 1996-07-03 | 1998-09-01 | Hensley; Gary L. | Decanting centrifuge employing elements with differing rates of rotation |
| US5971907A (en) * | 1998-05-19 | 1999-10-26 | Bp Amoco Corporation | Continuous centrifugal separator with tapered internal feed distributor |
| WO2000041813A1 (en) * | 1999-01-11 | 2000-07-20 | Westfalia Separator Ag | Centrifuge comprising two stripping discs |
| AU750491B2 (en) * | 1999-01-11 | 2002-07-18 | Westfalia Separator Ag | Centrifuge comprising two stripping discs |
| US6623417B1 (en) * | 1999-01-11 | 2003-09-23 | Westfalia Separator Ag | Centrifuge having a rotatable sleeve and a restriction point |
| WO2003024606A1 (en) * | 2001-09-05 | 2003-03-27 | Westfalia Separator Ag | Skimmer device for discharging liquid from a centrifugal drum |
| US6986733B2 (en) * | 2001-10-02 | 2006-01-17 | Westfalia Separator Industry Gmbh | Solid bowl helical conveyor centrifuge with a pressurized housing |
| US7056273B2 (en) * | 2002-05-29 | 2006-06-06 | Westfalia Separator Ag | Solid bowl screw centrifuge comprising a peeling disk, and method for the operation thereof |
| US7510519B2 (en) * | 2003-08-08 | 2009-03-31 | Westfalia Separator Ag | Solid bowl screw centrifuge comprising a centripetal pump with a throtting device |
| US7255670B2 (en) * | 2004-03-04 | 2007-08-14 | Hutchison Hayes, L.P. | Three phase decanter centrifuge |
| US20100041535A1 (en) * | 2006-02-10 | 2010-02-18 | Westfalia Separator Ag | Solid-bowl screw centrifuge and process for its operation |
| US8444541B2 (en) * | 2006-02-10 | 2013-05-21 | Gea Mechanical Equipment Gmbh | Solid-bowl centrifuge having a liquid discharge sealed such that a pond level in a separation space remains unchanged when pressurization occurs |
| US20140341714A1 (en) * | 2013-04-23 | 2014-11-20 | Andritz Frautech S.R.L. | Device For Drawing Off Fluid Of A Centrifugation Device |
| US9856879B2 (en) * | 2013-04-23 | 2018-01-02 | Andritz Frautech S.R.L. | Centrifugation device with adjustable vanes |
| DE102018114843A1 (en) * | 2018-03-21 | 2019-09-26 | Gea Mechanical Equipment Gmbh | Centrifuge with a paring disc |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4328369A1 (en) | 1995-03-02 |
| JPH07163907A (en) | 1995-06-27 |
| EP0640398A3 (en) | 1995-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1239966B1 (en) | Mill classifier | |
| DE60110441T2 (en) | CONVEYORS FOR CENTRIFUGE, CENTRIFUGE AND SEPARATION | |
| DE2220535B1 (en) | ROTARY FLOW EIRBLER FOR SEPARATING FINE-GRAIN PARTICLES | |
| EP0146852A1 (en) | Agitator mill | |
| DE3709623C2 (en) | ||
| EP2155353A1 (en) | Press screw separator | |
| EP0640398A2 (en) | Centrifuge | |
| DE60318833T2 (en) | DEAN ANIMAL CENTRIFUGE | |
| DE69320602T2 (en) | Centrifugal concentration machine | |
| EP1485205A1 (en) | Helical conveyor centrifuge | |
| EP0638365B1 (en) | Method and device for separating fine-grained solids into two grain size fractions | |
| DE9218957U1 (en) | Filter device | |
| DE3723864A1 (en) | Solid-bowl worm centrifuge | |
| DE1471630B2 (en) | Two-stage wet scrubber for cleaning gases | |
| EP0504836B1 (en) | Agitator mill | |
| DE3624086C2 (en) | ||
| DE60308015T2 (en) | DEVICE AND METHOD FOR SEPARATING A MIXTURE | |
| DE1040459B (en) | Centrifugal drum with a drum space of relatively large length | |
| DE69307835T2 (en) | Pump housing device | |
| DE69312643T2 (en) | CENTRIFUGAL SEPARATOR | |
| DE2840128A1 (en) | Eddy current separator for slurries | |
| DE2013499A1 (en) | Arrangement for a cyclone separator with an emptying chamber | |
| EP1337344A1 (en) | Solid bowl screw centrifuge comprising a distributor | |
| DE2220534C3 (en) | Rotary flow vortex for the sifting and separation of fine-grained particles | |
| DE4029252A1 (en) | METHOD AND DEVICE FOR CONTINUOUS FINE SIZING AND DISPERSING SOLIDS IN LIQUID |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE DK ES IT NL SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE DK ES IT NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19951201 |