EP0801593B1 - Solid-bowl centrifuge - Google Patents

Solid-bowl centrifuge Download PDF

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Publication number
EP0801593B1
EP0801593B1 EP95935450A EP95935450A EP0801593B1 EP 0801593 B1 EP0801593 B1 EP 0801593B1 EP 95935450 A EP95935450 A EP 95935450A EP 95935450 A EP95935450 A EP 95935450A EP 0801593 B1 EP0801593 B1 EP 0801593B1
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EP
European Patent Office
Prior art keywords
sealing
gas
liquid
liquid level
chamber
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Expired - Lifetime
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EP95935450A
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German (de)
French (fr)
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EP0801593A1 (en
Inventor
Willi Ostkamp
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GEA Mechanical Equipment GmbH
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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
    • 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
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/06—Arrangement of distributors or collectors in centrifuges
    • 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 relates to a solid bowl centrifuge with a centrifugal drum to separate a solid-liquid mixture, the drum interior of one Discharge chamber for the separated liquid through a weir disc rotating with the centrifugal drum whose inner diameter is the inner diameter of the liquid level in the interior of the drum.
  • Such a centrifuge is known for example from DE 37 28 901 C1.
  • the discharge device for the separated Solid is usually designed in such a way that no liquid can drain over it.
  • the severed Liquid can therefore only over the inner diameter emerge from the weir disc so that this diameter determines the liquid level in the interior of the drum.
  • the weir is separated by two weir disks arranged to each other formed the have a different inner diameter.
  • the Weir disks can be actuated hydraulically Sliders can be activated selectively by two different ones Set liquid levels in the centrifugal drum. A stepless choice of the liquid level is not possible here and the design effort is relative high.
  • the invention has for its object the centrifugal drum to train so that with little constructive Effort a stepless change in the liquid level is possible inside the drum.
  • This object is achieved in that two flat surfaces the weir disk locking washers are assigned by a penetrating the inner diameter of the weir disc Cylinder part are connected to each other in a gas-tight manner the first lock washer in the liquid level of the Drum interior and the second locking disc in the Liquid level of the discharge chamber immersed and thereby formed pressure space with a gas supply channel a gas of variable pressure is applied, whereby a continuous change of the liquid level in the interior of the drum is made possible.
  • the locking disks are arranged stationary.
  • the connection of the pressure room with the fixed gas supply duct is therefore without use a rotating seal possible.
  • the second locking disk is designed as a peeling element.
  • both flat surfaces provide ribs on the weir disc. This will make the centrifugal braking effect of the two locking disks minimized.
  • a further advantageous embodiment is characterized in that the locking disks rotate with the centrifugal drum and a liquid-filled sealing chamber is provided on the radially inward side of the cylinder part, into which a gas guiding channel opens radially inward from the liquid level, a stationary gas supply device with two radially outward-pointing sealing disks is provided, which immerse on both sides of the gas supply channel in the liquid level of the sealing chamber.
  • the friction losses are very low due to the sealing washers immersed in the liquid, since the sealing washers have a much smaller diameter than the locking washers. Since the locking disks rotate themselves, they do not cause any friction losses.
  • the sealing chamber assigned a supply channel for sealing liquid. Through the Adding barrier liquid will make the liquid level maintained in the sealing chamber.
  • the Sealing chamber assigned a drain channel. The sealing chamber this empties when the supply channel is closed. If it is not necessary to influence the liquid level friction losses can be eliminated will.
  • the feed channel is located with the discharge channel of a peeling element in connection.
  • This version is not a special device required for the supply of sealing liquid.
  • the liquid level in the interior of the drum can be opened simple way to keep it at the desired level that the gas supply channel is connected to a gas supply line is in which a pressure control device is provided is.
  • FIG. 1 in FIG. 1 denotes the centrifugal drum, whose drum interior 2 by a weir disk 3 from one Discharge chamber 4 is separated.
  • the two flat surfaces the weir plate 3 are a first locking plate 5 and one assigned second locking disc 6 by a the inner diameter the weir disk 3 penetrating cylinder part 7 gas-tightly connected to one another and arranged in a stationary manner are.
  • the first locking disk 5 is immersed in the liquid level of the drum interior 2 and the second Locking disc 6 in the liquid level of the discharge chamber 4 a.
  • the second locking disk 6 is on a peeling element 8 intended.
  • a Pressure chamber 9 is formed, the gas supply channel 10 and a gas supply line 11 with a not shown Gas pressure source is connected.
  • a pressure control device 12 is provided in the gas supply line 11, a pressure control device 12 is provided.
  • the minimum Liquid level "D” fixed and thus a preselection for the expected adjustment range. This does not close the control range for the gas pressure large.
  • the pressure chamber 9 via the gas supply line 11 and the gas supply channel 10 pressurized. This Pressure is transferred to the liquid that is in the Area of the pressure chamber 9 is located.
  • the liquid level inside the drum moves 2 as far radially inwards until a pressure equilibrium between the corresponding liquids consists.
  • the liquid level in the interior of the drum 2 can thereby correspond to the compensation pressure Liquid level "d” shifted radially inwards be, with no liquid on the discharge device can leak for the solid.
  • the gas pressure is set according to the desired liquid level and also by the pressure control device 12 Inflow fluctuations kept at this level.
  • the locking disks rotate 5 and 6 with the centrifugal drum 1. This eliminates the Fluid friction between the lock washers 5 and 6 and the liquid in the interior of the drum 2 or the discharge chamber 4.
  • a gas supply device 13 with two radially outward-facing sealing washers 14 and 15 provided on both sides of a gas guide channel 16 in the liquid level of a sealing chamber 17 immerse yourself. The gas pressure is transferred in this version from the sealing chamber 17 to the pressure chamber 9 and causes thereby a radially inward shift due to the liquid level "D" in the drum interior 2 of the effect described above.
  • the sealing chamber 17 can also be provided with an outlet channel 25 be through which the sealing chamber 17 when locked Feed channel 18 can empty. If an interference the liquid level is not required, can reduce the friction losses by emptying the sealing chamber 17 can be eliminated.

Abstract

The space (2) inside the drum of the centrifuge described is separated from the drain-off space (4) by a protective wall (3). The two flat surfaces of the wall (3) are associated with a first barrier (5) and a second barrier (6) which are hermetically joined to each other and fixed in place by a cylinder element (7) that extends through the inside diameter of the protective wall (3). The first barrier (5) descends below the level of the liquid inside the drum and the second barrier (6) below that of the liquid in the drain-off space (4). The two barriers (5 and 6) form a pressure chamber (9) acted on by pressure supplied through a gas-supply channel (10) and a gas-supply line (11), the pressure causing the level (D) of the liquid inside the drum to be moved radially inwards. Changing the gas pressure enables the liquid to be adjusted to any level between D and d.

Description

Die Erfindung bezieht sich auf eine Vollmantelzentrifuge mit einer Schleudertrommel zum Trennen eines FeststoffFlüssigkeitsgemisches, wobei der Trommelinnenraum von einer Ableitkammer für die abgetrennte Flüssigkeit durch eine mit der Schleudertrommel rotierende Wehrscheibe getrennt ist, deren Innendurchmesser den inneren Durchmesser des Flüssigkeitsspiegels im Trommelinnenraum beeinflußt.The invention relates to a solid bowl centrifuge with a centrifugal drum to separate a solid-liquid mixture, the drum interior of one Discharge chamber for the separated liquid through a weir disc rotating with the centrifugal drum whose inner diameter is the inner diameter of the liquid level in the interior of the drum.

Eine derartige Zentrifuge ist beispielsweise bekannt aus der DE 37 28 901 C1. Die Austragsvorrichtung für den abgetrennten Feststoff ist üblicherweise derart ausgebildet, daß keine Flüssigkeit darüber ablaufen kann. Die abgetrennte Flüssigkeit kann daher nur über den Innendurchmesser der Wehrscheibe austreten, so daß dieser Durchmesser den Flüssigkeitsspiegel im Trommelinnenraum bestimmt. Bei der bekannten Zentrifuge wird das Wehr durch zwei mit Abstand zueinander angeordneten Wehrscheiben gebildet, die einen unterschiedlichen Innendurchmesser besitzen. Die Wehrscheiben können durch einen hydraulisch betätigbaren Schieber wahlweise aktiviert werden, um zwei unterschiedliche Flüssigkeitsstände in der Schleudertrommel einzustellen. Eine stufenlose Wahl des Flüssigkeitsstandes ist hierbei nicht möglich und der konstruktive Aufwand ist relativ hoch. Such a centrifuge is known for example from DE 37 28 901 C1. The discharge device for the separated Solid is usually designed in such a way that no liquid can drain over it. The severed Liquid can therefore only over the inner diameter emerge from the weir disc so that this diameter determines the liquid level in the interior of the drum. At the well-known centrifuge, the weir is separated by two weir disks arranged to each other formed the have a different inner diameter. The Weir disks can be actuated hydraulically Sliders can be activated selectively by two different ones Set liquid levels in the centrifugal drum. A stepless choice of the liquid level is not possible here and the design effort is relative high.

Der Erfindung liegt die Aufgabe zugrunde, die Schleudertrommel so auszubilden, daß mit geringem konstruktiven Aufwand eine stufenlose Veränderung des Flüssigkeitsspiegels im Trommelinnenraum möglich ist.The invention has for its object the centrifugal drum to train so that with little constructive Effort a stepless change in the liquid level is possible inside the drum.

Diese Aufgabe wird dadurch gelöst, daß beiden Planflächen der Wehrscheibe Sperrscheiben zugeordnet sind, die durch einen den Innendurchmesser der Wehrscheibe durchdringenden Zylinderteil gasdicht miteinander verbunden sind, wobei die erste Sperrscheibe in den Flüssigkeitsspiegel des Trommelinnenraumes und die zweite Sperrscheibe in den Flüssigkeitsspiegel der Ableitkammer eintaucht und der dadurch gebildete Druckraum über einen Gaszufuhrkanal mit einem Gas variablem Druck beaufschlagt ist, wodurch eine stufenlose Veränderung des Flüssigkeitsspiegels im Trommelinnenraum ermöglicht wird.This object is achieved in that two flat surfaces the weir disk locking washers are assigned by a penetrating the inner diameter of the weir disc Cylinder part are connected to each other in a gas-tight manner the first lock washer in the liquid level of the Drum interior and the second locking disc in the Liquid level of the discharge chamber immersed and thereby formed pressure space with a gas supply channel a gas of variable pressure is applied, whereby a continuous change of the liquid level in the interior of the drum is made possible.

Solange im Druckraum atmosphärischer Druck herrscht, wird im Trommelinnenraum ein Flüssigkeitsspiegel aufrechterhalten, der dem Innendurchmesser der Wehrscheibe entspricht. Wird der Druckraum mit Druck beaufschlagt, so überträgt sich dieser Durck auf die Flüssigkeit zwischen den beiden Wehrscheiben. Um diesen Gasdruck zu kompensieren, bewegt sich der Flüssigkeitsspiegel im Trommelinnenraum soweit radial einwärts, bis ein Druckgleichgewicht zwischen den korrespondierenden Flüssigkeiten besteht. Der Flüssigkeitsspiegel im Trommelinnenraum kann dadurch bis auf einen dem Kompensationsdruck entsprechenden Flüssigkeitsspiegel "d" radial einwärts verschoben werden, wobei noch keine Flüssigkeit an der Austragsvorrichtung für den Feststoff austreten kann.As long as there is atmospheric pressure in the pressure chamber maintain a liquid level inside the drum, which corresponds to the inside diameter of the weir disc. If the pressure chamber is pressurized, it is transmitted this pressure on the liquid between the two Weir washers. To compensate for this gas pressure, move the liquid level in the drum interior so far radially inwards until a pressure equilibrium between the corresponding liquids. The liquid level in the interior of the drum, except for one liquid level corresponding to the compensation pressure "d" are moved radially inward, still no liquid at the discharge device for the solid can leak.

Bei einer vorteilhaften Ausgestaltung sind die Sperrscheiben ortsfest angeordnet. Die Verbindung des Druckraumes mit dem ortfesten Gaszufuhrkanal ist daher ohne Verwendung einer rotierenden Abdichtung möglich.In an advantageous embodiment, the locking disks are arranged stationary. The connection of the pressure room with the fixed gas supply duct is therefore without use a rotating seal possible.

Bei einer weiteren vorteilhaften Ausgestaltung ist die zweite Sperrscheibe als Schälorgan ausgebildet. Hierdurch ergibt sich bei Zentrifugen mit Schälscheiben eine konstruktiv einfache Lösung.In a further advantageous embodiment, the second locking disk is designed as a peeling element. Hereby In the case of centrifuges with peeling discs, there is a design simple solution.

Bei einer vorteilhaften Ausgestaltung sind beide Planflächen der Wehrscheibe mit Rippen versehen. Dadurch wird die fliehkraftmindernde Bremswirkung der beiden Sperrscheiben minimiert.In an advantageous embodiment, both flat surfaces provide ribs on the weir disc. This will make the centrifugal braking effect of the two locking disks minimized.

Eine weitere vorteilhafte Ausgestaltung ist dadurch gekennzeichnet, daß die Sperrscheiben mit der Schleudertrommel rotieren und auf der radial einwärts gelegenen Seite des Zylinderteiles eine flüssigkeitsgefüllte Dichtkammer vorgesehen ist, in die ein Gasleitkanal radial einwärts vom Flüssigkeitsspiegel mündet, wobei eine ortsfeste Gaszufuhreinrichtung mit zwei radial auswärts gerichteten Dichtscheiben vorgesehen ist, die zu beiden Seiten des Gaszufuhrkanals in den Flüssigkeitsspiegel der Dichtkammer eintauchen.
Bei dieser Ausführung sind die Reibungsverluste aufgrund der in die Flüssigkeit eintauchenden Dichtscheiben sehr gering, da die Dichtscheiben einen wesentlich kleineren Durchmesser besitzen als die Sperrscheiben. Da die Sperrscheiben selbst mitrotieren, verursachen sie keine Reibungsverluste.A further advantageous embodiment is characterized in that the locking disks rotate with the centrifugal drum and a liquid-filled sealing chamber is provided on the radially inward side of the cylinder part, into which a gas guiding channel opens radially inward from the liquid level, a stationary gas supply device with two radially outward-pointing sealing disks is provided, which immerse on both sides of the gas supply channel in the liquid level of the sealing chamber.
In this embodiment, the friction losses are very low due to the sealing washers immersed in the liquid, since the sealing washers have a much smaller diameter than the locking washers. Since the locking disks rotate themselves, they do not cause any friction losses.

Bei einer vorteilhaften Ausgestaltung sind alle den Dichtscheiben zugewandten Planflächen der Dichtkammer mit Rippen versehen. Dadurch wird die fliehkraftmindernde Bremswirkung der beiden Dichtscheiben minimiert.In an advantageous embodiment, all of the sealing washers facing flat surfaces of the sealing chamber with ribs Mistake. This reduces the centrifugal braking effect of the two sealing washers minimized.

Bei einer vorteilhaften Ausgestaltung ist der Dichtkammer ein Zufuhrkanal für Sperrflüssigkeit zugeordnet. Durch die Zugabe von Sperrflüssigkeit wird der Flüssigkeitsspiegel in der Dichtkammer aufrechterhalten.In an advantageous embodiment, the sealing chamber assigned a supply channel for sealing liquid. Through the Adding barrier liquid will make the liquid level maintained in the sealing chamber.

Bei einer weiteren vorteilhaften Ausgestaltung ist der Dichtkammer ein Ablaufkanal zugeordnet. Die Dichtkammer entleert sich dadurch bei abgesperrtem Zufuhrkanal. Falls eine Beeinflussung des Flüssigkeitsspiegels nicht erforderlich ist, können damit die Reibungsverluste eliminiert werden. In a further advantageous embodiment, the Sealing chamber assigned a drain channel. The sealing chamber this empties when the supply channel is closed. If it is not necessary to influence the liquid level friction losses can be eliminated will.

Gemäß einer vorteilhaften Ausgestaltung steht der Zufuhrkanal mit dem Ableitkanal eines Schälorganes in Verbindung. Bei dieser Ausführung ist keine spezielle Einrichtung zur Zuführung von Sperrflüssigkeit erforderlich.According to an advantageous embodiment, the feed channel is located with the discharge channel of a peeling element in connection. This version is not a special device required for the supply of sealing liquid.

Der Flüssigkeitsspiegel im Trommelinnenraum läßt sich auf einfache Weise dadurch auf dem gewünschten Niveau halten, daß der Gaszufuhrkanal mit einer Gaszufuhrleitung in Verbindung steht, in der eine Druckregeleinrichtung vorgesehen ist.The liquid level in the interior of the drum can be opened simple way to keep it at the desired level that the gas supply channel is connected to a gas supply line is in which a pressure control device is provided is.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden nachstehend näher erläutert. Es zeigt

Fig. 1
eine Schleudertrommel mit ortsfesten Sperrscheiben,
Fig. 2
eine Schleudertrommel mit rotierenden Sperrscheiben.
Embodiments of the invention are shown in the drawing and are explained in more detail below. It shows
Fig. 1
a centrifugal drum with fixed locking disks,
Fig. 2
a centrifugal drum with rotating locking disks.

Mit 1 ist in der Fig. 1 die Schleudertrommel bezeichnet, deren Trommelinnenraum 2 durch eine Wehrscheibe 3 von einer Ableitkammer 4 getrennt ist. Den beiden Planflächen der Wehrscheibe 3 sind eine erste Sperrscheibe 5 und eine zweite Sperrscheibe 6 zugeordnet, die durch einen den Innendurchmesser der Wehrscheibe 3 durchdringenden Zylinderteil 7 gasdicht miteinander verbunden und ortsfest angeordnet sind. Die erste Sperrscheibe 5 taucht in den Flüssigkeitsspiegel des Trommelinnenraumes 2 und die zweite Sperrscheibe 6 in den Flüssigkeitsspiegel der Ableitkammer 4 ein. Die zweite Sperrscheibe 6 ist an einem Schälorgan 8 vorgesehen. Durch die Sperrscheiben 5 und 6 wird ein Druckraum 9 gebildet, der über einen Gaszufuhrkanal 10 und eine Gaszufuhrleitung 11 mit einer nicht dargestellten Gasdruckquelle in Verbindung steht. In der Gaszufuhrleitung 11 ist eine Druckregeleinrichtung 12 vorgesehen.1 in FIG. 1 denotes the centrifugal drum, whose drum interior 2 by a weir disk 3 from one Discharge chamber 4 is separated. The two flat surfaces the weir plate 3 are a first locking plate 5 and one assigned second locking disc 6 by a the inner diameter the weir disk 3 penetrating cylinder part 7 gas-tightly connected to one another and arranged in a stationary manner are. The first locking disk 5 is immersed in the liquid level of the drum interior 2 and the second Locking disc 6 in the liquid level of the discharge chamber 4 a. The second locking disk 6 is on a peeling element 8 intended. Through the locking washers 5 and 6 is a Pressure chamber 9 is formed, the gas supply channel 10 and a gas supply line 11 with a not shown Gas pressure source is connected. In the gas supply line 11, a pressure control device 12 is provided.

Durch den Innendurchmesser der Wehrscheibe 3 wird der minimale Flüssigkeitsspiegel "D" fixiert und damit eine Vorauswahl für den zu erwartenden Verstellbereich getroffen. Dadurch wird der Regelbereich für den Gasdruck nicht zu groß. Um den Flüssigkeitsspiegel im Trommelinnenraum 2 zu verändern, wird der Druckraum 9 über die Gaszufuhrleitung 11 und den Gaszufuhrkanal 10 mit Druck beaufschlagt. Dieser Druck überträgt sich auf die Flüssigkeit, die sich im Bereich des Druckraumes 9 befindet. Um diesen Gasdruck zu kompensieren, bewegt sich der Flüssigkeitsspiegel im Trommelinnenraum 2 soweit radial einwärts, bis ein Druckgleichgewicht zwischen den korrespondierenden Flüssigkeiten besteht. Der Flüssigkeitsspiegel im Trommelinnenraum 2 kann dadurch bis auf einen dem Kompensationsdruck entsprechenden Flüssigkeitsspiegel "d" radial einwärts verschoben werden, wobei noch keine Flüssigkeit an der Austragsvorrichtung für den Feststoff austreten kann. Der Gasdruck wird entsprechend dem gewünschten Flüssigkeitsspiegel eingestellt und durch die Druckregeleinrichtung 12 auch bei Zulaufschwankungen auf diesem Niveau gehalten.Due to the inner diameter of the weir disc 3, the minimum Liquid level "D" fixed and thus a preselection for the expected adjustment range. This does not close the control range for the gas pressure large. To the liquid level in the interior 2 of the drum change, the pressure chamber 9 via the gas supply line 11 and the gas supply channel 10 pressurized. This Pressure is transferred to the liquid that is in the Area of the pressure chamber 9 is located. To this gas pressure too compensate, the liquid level inside the drum moves 2 as far radially inwards until a pressure equilibrium between the corresponding liquids consists. The liquid level in the interior of the drum 2 can thereby correspond to the compensation pressure Liquid level "d" shifted radially inwards be, with no liquid on the discharge device can leak for the solid. The gas pressure is set according to the desired liquid level and also by the pressure control device 12 Inflow fluctuations kept at this level.

Bei der Ausführung gemäß Fig. 2 rotieren die Sperrscheiben 5 und 6 mit der Schleudertrommel 1. Dadurch entfällt die Flüssigkeitsreibung zwischen den Sperrscheiben 5 und 6 und der Flüssigkeit im Trommelinnenraum 2 bzw. der Ableitkammer 4. Zur Übertragung des Gasdruckes aus der Gaszufuhrleitung 10 in den Druckraum 9 ist eine Gaszufuhreinrichtung 13 mit zwei radial auswärtsgerichteten Dichtscheiben 14 und 15 vorgesehen, die zu beiden Seiten eines Gasleitkanals 16 in den Flüssigkeitsspiegel einer Dichtkammer 17 eintauchen. Der Gasdruck überträgt sich bei dieser Ausführung von der Dichtkammer 17 auf die Druckkammer 9 und bewirkt dabei eine radial einwärts gerichtete Verschiebung des Flüssigkeitsspiegels "D" im Trommelinnenraum 2 aufgrund des oben beschriebenen Effektes. Da die Dichtscheiben 14 und 15 auf einem wesentlich kleineren Durchmesser vorgesehen sind als die Sperrscheiben 5 und 6, sind die Reibungsverluste wesentlich geringer als bei der Ausführung nach Fig. 1. Durch einen Zufuhrkanal 18, der mit einem Ableitkanal 19 des Schälorganes 8 verbunden sein kann, wird ständig eine geringe Menge der abgeleiteten Flüssigkeitsphase als Dichtflüssigkeit in die Dichtkammer 17 geleitet und damit deren Füllung gewährleistet. 2, the locking disks rotate 5 and 6 with the centrifugal drum 1. This eliminates the Fluid friction between the lock washers 5 and 6 and the liquid in the interior of the drum 2 or the discharge chamber 4. To transfer the gas pressure from the gas supply line 10 in the pressure chamber 9 is a gas supply device 13 with two radially outward-facing sealing washers 14 and 15 provided on both sides of a gas guide channel 16 in the liquid level of a sealing chamber 17 immerse yourself. The gas pressure is transferred in this version from the sealing chamber 17 to the pressure chamber 9 and causes thereby a radially inward shift due to the liquid level "D" in the drum interior 2 of the effect described above. Because the sealing washers 14 and 15 on a much smaller diameter are provided as the locking disks 5 and 6, are the Friction losses significantly lower than in the execution according to Fig. 1. By a supply channel 18 which with a Discharge channel 19 of the peeling element 8 can be connected, is constantly a small amount of the derived liquid phase passed as a sealing liquid into the sealing chamber 17 and thus ensures their filling.

Zur Minimierung der fliehkraftmindernden Bremswirkung sind die Planflächen der Wehrscheibe 3 mit Rippen 20 und 21 und alle den Dichtscheiben 14 und 15 zugewandten Planflächen mit Rippen 22, 23 und 24 versehen.To minimize the centrifugal braking effect the flat surfaces of the weir plate 3 with ribs 20 and 21 and all flat surfaces facing the sealing disks 14 and 15 provided with ribs 22, 23 and 24.

Die Dichtkammer 17 kann auch mit einem Ablaufkanal 25 versehen sein, durch den sich die Dichtkammer 17 bei abgesperrtem Zufuhrkanal 18 entleeren kann. Falls eine Beeinflussung des Flüssigkeitsspiegels nicht erforderlich ist, können die Reibungsverluste durch Entleeren der Dichtkammer 17 eliminiert werden.The sealing chamber 17 can also be provided with an outlet channel 25 be through which the sealing chamber 17 when locked Feed channel 18 can empty. If an interference the liquid level is not required, can reduce the friction losses by emptying the sealing chamber 17 can be eliminated.

Claims (10)

  1. Solid wall centrifuge with a centrifugal bowl (1) for the separation of a solid-liquid mixture, the bowl interior (2) being partitioned off from a discharge chamber (4) for the separated liquid by means of a ring dam (3) rotating with the centrifugal bowl (1), the inner diameter of the former influencing the inner diameter of the liquid level in the bowl interior (2), characterised in that the two plane faces of the ring dam (3) are allocated sealing discs (5, 6) which are connected to each other in a gas-tight arrangement by a cylindrical element (7) passing through the inner diameter of the ring dam (3), whereby the first sealing disc (5) is immersed in the liquid level of bowl interior (2) and the second sealing disc (6) is immersed in the liquid level of the discharge chamber (4) and the pressure chamber (9) thus formed is supplied with variable gas pressure through a gas feed channel (10), thus permitting a stepless variation of the liquid level in the bowl interior (2).
  2. Centrifuge according to claim 1, characterised in that the sealing discs (5, 6) are stationary.
  3. Centrifuge according to claim 1 or 2, characterised in that the second sealing disc (6) is designed as a paring organ (8).
  4. Centrifuge according to claim 1, characterised in that the plane faces of the ring dam (3) are provided with ribs (20, 21).
  5. Centrifuge according to claim 1, characterised in that the sealing discs (5, 6) rotate with the centrifugal bowl (1) and a liquid-filled sealing chamber (17) is situated on the radially inward side of the cylindrical element (7), into which sealing chamber (17) a gas duct (16) leads radially inwards from the liquid level, being provided with a stationary gas feeding device (13) with two sealing discs (14, 15) directed radially outwards, which are immersed in the liquid level of the sealing chamber (17) on both sides of gas duct (16).
  6. Centrifuge according to claim 5, characterised in that all plane faces of the sealing chamber (17) facing the sealing discs (14, 15) are provided with ribs (22, 23, 24).
  7. Centrifuge according to claim 5 or 6, characterised in that the sealing chamber (17) is allocated a feed channel (18) for sealing liquid.
  8. Centrifuge according to one of the claims 5 to 7, characterised in that the feed channel (18) is connected to a discharge channel (19) of the paring organ (8).
  9. Centrifuge according to one of the claims 5 to 7, characterised in that the sealing chamber (17) is allocated a discharge channel (25).
  10. Centrifuge according to one of the claims 1 to 9, characterised in that the gas feed channel (10) is connected to a gas feed line (11) in which a gas regulating device (12) is fitted.
EP95935450A 1995-01-11 1995-10-16 Solid-bowl centrifuge Expired - Lifetime EP0801593B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19500600 1995-01-11
DE19500600A DE19500600C1 (en) 1995-01-11 1995-01-11 Solid sleeve centrifuge for separating fluid or solids mixture
PCT/EP1995/004054 WO1996021510A1 (en) 1995-01-11 1995-10-16 Solid-bowl centrifuge

Publications (2)

Publication Number Publication Date
EP0801593A1 EP0801593A1 (en) 1997-10-22
EP0801593B1 true EP0801593B1 (en) 1998-08-05

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Application Number Title Priority Date Filing Date
EP95935450A Expired - Lifetime EP0801593B1 (en) 1995-01-11 1995-10-16 Solid-bowl centrifuge

Country Status (6)

Country Link
US (1) US5885202A (en)
EP (1) EP0801593B1 (en)
JP (1) JP2980690B2 (en)
DE (2) DE19500600C1 (en)
DK (1) DK0801593T3 (en)
WO (1) WO1996021510A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830653C1 (en) * 1998-07-09 1999-11-11 Westfalia Separator Ag Determination of fluid level in horizontal centrifugal decanter
EP1232794B1 (en) * 2001-02-08 2004-06-09 Westfalia Separator AG Method for separating of a multi-phase mixture and decanter centrifuge system for carrying out this method
DE10143405C2 (en) * 2001-09-05 2003-12-18 Westfalia Separator Ag Peeling disc device for draining liquid from a centrifuge drum
DE10203652B4 (en) * 2002-01-30 2006-10-19 Westfalia Separator Ag Solid bowl centrifuge with a weir
DE10220757B4 (en) * 2002-05-08 2004-06-24 Westfalia Separator Ag Centrifuge, especially separator
DE10223802B4 (en) * 2002-05-29 2005-06-09 Westfalia Separator Ag Solid bowl centrifuge
DE10336350B4 (en) * 2003-08-08 2007-10-31 Westfalia Separator Ag Solid bowl centrifuge, with paring disc
DE102005027553A1 (en) * 2005-06-14 2006-12-28 Westfalia Separator Ag Three-phase solid bowl screw centrifuge and process for controlling the separation process
CN100372614C (en) * 2005-11-24 2008-03-05 张家港华大离心机制造有限公司 Spiral unloading filtering centrifuge
EP1800754A1 (en) * 2005-12-21 2007-06-27 Jean-Denis Rochat Disposable blood centrifuge
CN101189068B (en) 2006-05-11 2011-09-28 威斯特伐利亚分离器股份公司 Three-phase separator and application and tri-phase separation method
DK200800555A (en) * 2008-04-16 2009-10-17 Alfa Laval Corp Ab Centrifugal separator
BRPI0917414A2 (en) 2008-08-15 2015-12-01 M Il L C centrifuge
DE102010012276A1 (en) * 2010-03-22 2011-09-22 Gea Westfalia Separator Gmbh Solid bowl centrifuge
DE102012102478A1 (en) * 2012-03-22 2013-09-26 Hiller Gmbh Solid bowl centrifuge
EP3085449B1 (en) * 2015-04-24 2020-06-03 Alfa Laval Corporate AB Centrifugal separator and thereto related methods
EP3156134B1 (en) 2015-10-12 2018-07-25 Alfa Laval Corporate AB Centrifugal separator with intermittent discharge of heavy phase
DE102022100511A1 (en) * 2022-01-11 2023-07-13 Gea Westfalia Separator Group Gmbh Solid bowl centrifuge and method of controlling the separation process of the solid bowl centrifuge

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179334A (en) * 1961-09-15 1965-04-20 Pennsalt Chemicals Corp Centrifuge discharge means
SE456562B (en) * 1981-10-22 1988-10-17 Westfalia Separator Ag CENTRIFUG WITH VERTICAL VRIDAXEL
DE3344432A1 (en) * 1983-12-08 1985-06-20 Flottweg Bird Mach Gmbh CENTRIFUGE TO SEPARATE A SUSPENSION WITH TWO SEPARATE LIQUID PHASES
DE3728901C1 (en) * 1987-08-29 1988-11-17 Westfalia Separator Ag Weir for adjusting the level of liquid in solid-bowl centrifuge drums of worm centrifuges
DE4014552C1 (en) * 1990-05-07 1991-07-18 Westfalia Separator Ag, 4740 Oelde, De
DE4104483A1 (en) * 1991-02-14 1992-08-20 Kloeckner Humboldt Deutz Ag METHOD FOR OPERATING A SNAIL CENTRIFUGE AND CENTRIFUGE THEREFOR
DE4126565C1 (en) * 1991-08-10 1992-11-12 Westfalia Separator Ag, 4740 Oelde, De Centrifuge drum for solids-liq. sepn.

Also Published As

Publication number Publication date
DK0801593T3 (en) 1999-05-03
DE59503096D1 (en) 1998-09-10
JPH10507684A (en) 1998-07-28
EP0801593A1 (en) 1997-10-22
US5885202A (en) 1999-03-23
DE19500600C1 (en) 1996-02-08
JP2980690B2 (en) 1999-11-22
WO1996021510A1 (en) 1996-07-18

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