EP0551252B1 - Reverse filter centrifugal machine - Google Patents

Reverse filter centrifugal machine Download PDF

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Publication number
EP0551252B1
EP0551252B1 EP90914387A EP90914387A EP0551252B1 EP 0551252 B1 EP0551252 B1 EP 0551252B1 EP 90914387 A EP90914387 A EP 90914387A EP 90914387 A EP90914387 A EP 90914387A EP 0551252 B1 EP0551252 B1 EP 0551252B1
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EP
European Patent Office
Prior art keywords
drum
reversible
filling
filter centrifuge
centrifuge according
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.)
Expired - Lifetime
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EP90914387A
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German (de)
French (fr)
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EP0551252A1 (en
Inventor
Hans Gerteis
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Heinkel Industriezentrifugen GmbH and Co
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Heinkel Industriezentrifugen GmbH and Co
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Publication of EP0551252A1 publication Critical patent/EP0551252A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges
    • B04B3/025—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges with a reversible filtering device

Definitions

  • the invention relates to an inverting filter centrifuge with a drum which is supported in a self-supporting, rotatable manner and has radial filtrate passages which can be pressurized with overpressure or underpressure, with a cover which closes the free end face of the drum, the drum and cover being axially displaceable relative to one another, with one on the cover provided filling opening for the suspension to be filtered and with a filling tube sealed and penetrating the filling opening.
  • a combined rotary and sliding seal is arranged between the stationary filling tube and the filling opening of the cover, which allows working in the drum with pressure or vacuum.
  • the combined rotary and sliding seal which is arranged directly in the filler opening of the lid, has the disadvantage that, due to the inevitable sliding sealing elements, there is strong abrasion in the area of the drum, which can easily lead to undesired contamination of the filtered product. Since the drum rotates at a very high number of revolutions in the filtering operation, considerable abrasion occurs which gives rise to considerable contamination.
  • the object is achieved in that the filling tube is rotatably mounted about its longitudinal axis and can be rotated together with the drum about this axis.
  • the filling pipe and drum rotate synchronously, all that is required is to provide a simple seal at the filling opening of the drum cover which is penetrated by the filling pipe, without abrasive sealing elements. In this way, abrasion which gives rise to impurities is completely avoided.
  • the inverting filter centrifuge shown schematically in FIG. 1 comprises the entire machine tightly enclosing housing 1, in which a hollow shaft 3 is rotatably mounted in bearings 4 on a stationary machine frame 2.
  • a shaft 5 is arranged axially displaceably, which is connected to the hollow shaft 3 in a rotationally fixed manner.
  • the shaft 5 thus rotates together with the hollow shaft 3, but is axially displaceable in the latter.
  • a pot-shaped centrifugal drum 7 is flanged with its bottom 8 in a self-supporting and rotationally fixed manner.
  • the drum 7 has radially extending passage openings 11 on its circular cylindrical side wall 9.
  • the drum 7 is open on its end face opposite the bottom 8.
  • On the flange-like opening edge 12 surrounding this open end face, the one edge 14 of an essentially tubular filter cloth 15 is tightly clamped by means of a retaining ring 13.
  • the other edge 16 of the filter cloth 15 is correspondingly tightly connected to a base piece 17, which is rigidly connected to the displaceable shaft 8 which penetrates freely.
  • the filter cloth 15 covers the filtrate passages formed by the passage openings 11.
  • the drum 7 can also be axially displaceable relative to the then stationary cover 19 for the same purpose.
  • a filling tube 21 is arranged on the left side of the inverting filter centrifuge in FIG. 1, which serves to feed a suspension to be broken down into its solid and liquid components into the centrifugal space of the drum 7.
  • the lid 19 of the drum 7 has a central filling opening 22, through which the free end of the filling tube 21 enters the interior of the drum, even when the lid 19 is closed.
  • the filling tube 21 is supported in a stationary bearing block 23 which is fixedly connected to the housing 1, but is located outside this housing, by means of rotary bearings 24 and is rotatable about its longitudinal axis.
  • the filling tube 21 can be set in rotation about its longitudinal axis, which is aligned with the axis of rotation of the drum 7, by means of a drive motor 25, preferably in the form of an electric motor, a belt 26 and a pulley 27 seated in a rotationally fixed manner on the filling tube 21.
  • Usual shaft seals 28 seal the outside of the filling tube 21 in the bearing block 23.
  • the bearing block 23 has an inlet opening 29 which can be connected to a pipeline and through which the suspension to be filtered can be introduced. The suspension passes directly from the filling opening 29 into the filling tube 21 and from there into the drum 7.
  • a bushing 31 which rotates together with the drum, is firmly inserted in the cover 19 of the drum 7 centrally and coaxially with the axis of rotation of the drum.
  • an annularly closed, elastic membrane 32 is arranged within a flat recess in the tube end.
  • a pneumatic or hydraulic pressure medium can be introduced via a line 33 running in the wall of the filling tube 21 between the membrane and the outer wall of the filling tube 21 located in the area of the membrane.
  • the membrane 32 turns radially outward and lies all around against the inner wall of the bush 31, so that a perfect pressure-tight seal is produced between the filling tube 21 and the cover 19 of the drum 8.
  • the line 33 opens into an annular recess 34 in the bearing block 23, into which the pressure medium mentioned for the membrane 32 can be introduced via a channel 35.
  • FIG. 1 the membrane 32 is in the upturned state shown in which it seals against the socket 31.
  • FIG. 2 shows the same state of the membrane 32 at the top.
  • the membrane In FIG. 2 below the membrane is shown in its relaxed, depressurized state, in which, due to its elasticity, it is pulled back smoothly into the above-mentioned recess at the end of the tube 21, so that between the sleeve 31 and the membrane 32 all around a distance that allows the lid 19 to move freely over the fill tube 21.
  • a further recess 36 with an outlet channel 37 is provided between the two shaft seals 28 in the bearing block 23. If necessary, suspension which has reached the shaft seal 28 on the left in FIG. 1 during the filling process can be discharged into the open via this recess 36 and this channel 37.
  • the filling pipe 21 is penetrated over its entire length by a pipeline 38 which is rigidly connected to the bearing block 23, that is to say remains stationary during the rotation of the filling pipe 21.
  • the pipeline 38 can be connected to the bearing block 23 with an overpressure or underpressure source, so that an overpressure or underpressure can be generated in the interior of the closed drum 7, against which, as already stated, that formed by the bushing 31 and the membrane 32 Seal seals.
  • the filling tube 21 can be put into circulation synchronously with the drum 7 because of its rotary bearing in the bearing block 23, there is no friction between the filling tube 21 and the drum 7 in the area of the filling opening 22.
  • the bushing 31 and the membrane 32 thus also rotate synchronously there no grinding abrasion, which could lead to contamination of the suspension in the drum 7. Abrasion could possibly occur to a small extent on the shaft seals 28, but it can be rinsed out there via the recess 36 and the channel 37 without getting into the drum 7.
  • the inverting filter centrifuge described first assumes the position shown in FIG. 1, in which a seal between the cover 19 and the filling tube 21 is produced via the membrane 32 to which pressure medium is applied.
  • the displaceable shaft 5 is retracted into the hollow shaft 3, as a result of which the shaft 5 connected bottom piece 17 is in the vicinity of the bottom of the centrifugal drum 7 and the filter cloth 15 is inserted into the drum such that it lies inside.
  • the centrifugal chamber cover 19 has placed itself tightly on the opening edge of the drum 7.
  • suspension to be filtered is introduced into the centrifugal space of the drum via the filler pipe 21.
  • the drum is rotated relatively quickly.
  • the liquid components of the suspension pass through the openings 11 of the drum 7 and are derived from a baffle plate 40.
  • the solid particles of the suspension are stopped by the filter cloth 15 in the form of the usual filter cake.
  • an overpressure or underpressure can be generated in the interior of the drum 7 via the pipeline 38, against which the seal formed by the bushing 31 and the membrane 32 seals.
  • the shaft 5 is turned to the left with the drum 7 rotating relatively slowly and after switching off the pressure or vacuum source connected to the line 38 and after opening the sealing closure formed by the bushing 31 and the membrane 32 (see FIG. 2 below) moved, whereby the filter cloth 15, as in Figure 1 shown in broken lines, turned inside out and the solid particles adhering to it are thrown outwards into the housing 1.
  • the filling tube 21 penetrates freely past the relaxed membrane 32 into the bore 39 of the shaft 5.
  • the inverting filter centrifuge is brought back into its closed operating position according to FIG. 1 by pulling back the shaft 5, the filter cloth 15 turning back in the opposite direction.
  • the centrifuge can be operated with a continuously rotating centrifugal drum 7, the pressure conditions in the drum 7 being able to be set as desired.
  • the filling tube 21 can be brought to the same speed as the drum before the sealing closure formed by the bushing 31 and the membrane 32 is closed, so that even during the closure of this closure, which leads to a rotationally fixed connection between filler tube 21 and drum 7, no undesirable abrasion can occur.
  • the drive of the filler pipe 21 shown via the motor 25 has only symbolic characters.
  • the synchronous drive of filler pipe 21 and drum 7 is realized with known electrical or mechanical means, for example using frequency-controlled motors with the same setpoint value.
  • the membrane forming an element of the sealing closure of the filling opening 22 is firmly connected to the filling tube 21.
  • a membrane to which a pressure medium can be applied could also be permanently connected to the cover 19 of the drum within the filling opening 22, so that it presses concentrically around the outer wall of the filling tube 21 when pressure medium is applied.
  • the pressure medium acting on the membrane must be supplied via the printing drum 7. This is indicated in FIG. 1 by a channel 41 shown in broken lines, which runs through the shaft 5, the base piece 17, the stud bolt 18 and the cover 19 towards the membrane.
  • the pipeline 38 serving to generate an overpressure or underpressure in the interior of the filling tube 21 can be replaced by a pipeline 42 which is formed in the shaft 5 and is also indicated by dashed lines in FIG.
  • FIG. 3 shows a bearing block 43 of a modified one Embodiment of an inverting filter centrifuge, wherein the bearing block 43 corresponds to the bearing block 23 in Figure 1. Parts that are identical to one another are identified by the same reference numerals in FIGS. 1 and 3.
  • the filling tube 44 has an end flange 45 on the rear.
  • An annular membrane seal 46 can be sealingly applied to the free end surface of the flange 45 if this membrane seal is acted upon on the rear side by a pressure medium formed in the bearing block 43 with a pressure medium.
  • the membrane seal 46 is in turn also arranged in a corresponding annular recess 48 of the bearing block 43 which is open towards the end flange 45.
  • the membrane seal 46 is in the opened state, that is to say detached from the end flange 45 of the filling tube, so that no undesired abrasion can occur between the membrane seal 46 and 44 filler tube.
  • the seals are designed as membrane seals. It is obvious that such membrane seals can also be replaced by other closure elements in the form of pneumatically or hydraulically actuated elastic pinch seals, for example also in the form of a tube.

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Abstract

PCT No. PCT/EP90/01617 Sec. 371 Date Feb. 25, 1993 Sec. 102(e) Date Feb. 25, 1993 PCT Filed Sep. 24, 1990 PCT Pub. No. WO92/04982 PCT Pub. Date Apr. 2, 1992.A reverse filter centrifugal machine has a self-contained, rotatably mounted basket (7) in a housing (1), provided with radial filtrate passages (11) and capable of receiving an overpressure or a negative pressure, as well as a lid (19) that closes the free front side of the basket. The basket and the lid are axially movable with respect to one another. A feed opening for the suspension to be filtered is arranged in the lid and a feed pipe (21) is sealingly inserted through the feed opening. The feed pipe (21) is rotatably mounted around its longitudinal axis and can be rotated together with the basket (7) around this axis.

Description

Die Erfindung betrifft eine Stülpfilterzentrifuge mit einer in einem Gehäuse freitragend drehbar gelagerten, radiale Filtratdurchlässe aufweisenden, mit Über- oder Unterdruck beaufschlagbaren Trommel, mit einem die freie Stirnseite der Trommel verschließenden Deckel, wobei Trommel und Deckel relativ zueinander axial verschieblich sind, mit einer am Deckel vorgesehenen Einfüllöffnung für zu filtrierende Suspension und mit einem die Einfüllöffnung abgedichtet durchdringenden Füllrohr.The invention relates to an inverting filter centrifuge with a drum which is supported in a self-supporting, rotatable manner and has radial filtrate passages which can be pressurized with overpressure or underpressure, with a cover which closes the free end face of the drum, the drum and cover being axially displaceable relative to one another, with one on the cover provided filling opening for the suspension to be filtered and with a filling tube sealed and penetrating the filling opening.

Bei einer bekannten Stülpfilterzentrifuge dieser Art (DE 37 40 411 A1) ist zwischen dem stationären Füilrohr und der Einfüllöffnung des Deckels eine kombinierte Dreh- und Gleitdichtung angeordnet, die es gestattet, in der Trommel mit Druck- oder Unterdruck zu arbeiten. Die kombinierte Dreh- und Gleitdichtung, die unmittelbar in der Einfüllöffnung des Deckels angeordnet ist, hat den Nachteil, daß wegen der unvermeidlichen schleifenden Dichtelemente ein starker Abrieb im Bereich der Trommel entsteht, der leicht zu unerwünschten Verunreinigungen des filtrierten Produktes führen kann. Da die Trommel im Filtrierbetrieb mit sehr hoher Umdrehungszahl umläuft, entsteht ein erheblicher Abrieb, der zu erheblichen Verunreinigungen Anlaß gibt.In a known inverting filter centrifuge of this type (DE 37 40 411 A1), a combined rotary and sliding seal is arranged between the stationary filling tube and the filling opening of the cover, which allows working in the drum with pressure or vacuum. The combined rotary and sliding seal, which is arranged directly in the filler opening of the lid, has the disadvantage that, due to the inevitable sliding sealing elements, there is strong abrasion in the area of the drum, which can easily lead to undesired contamination of the filtered product. Since the drum rotates at a very high number of revolutions in the filtering operation, considerable abrasion occurs which gives rise to considerable contamination.

Es ist Aufgabe der Erfindung, eine gattungsgemäße Stülpfilterzentrifuge so zu verbessern, daß eine Abrieb verursachende kombinierte Dreh- und Gleitdichtung im Bereich der Einfüllöffnung der Trommel entfallen kann.It is an object of the invention to improve a generic inverting filter centrifuge in such a way that a combined rotary and sliding seal causing abrasion in the region of the filling opening of the drum can be dispensed with.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Füllrohr um seine Längsachse drehbar gelagert und zusammen mit der Trommel um diese Achse in Umlauf versetzbar ist.The object is achieved in that the filling tube is rotatably mounted about its longitudinal axis and can be rotated together with the drum about this axis.

Da nach dem allgemeinen Erfindungskonzept Füllrohr und Trommel synchron umlaufen, braucht an der von dem Füllrohr durchdrungenen Einfüllöffnung des Trommeldeckels lediglich eine einfache Abdichtung ohne schleifende Dichtelemente vorgesehen zu werden. Hierdurch ist ein zu Verunreinigungen Anlaß gebender Abrieb vollkommen vermieden.Since, according to the general concept of the invention, the filling pipe and drum rotate synchronously, all that is required is to provide a simple seal at the filling opening of the drum cover which is penetrated by the filling pipe, without abrasive sealing elements. In this way, abrasion which gives rise to impurities is completely avoided.

Die nachstehende Beschreibung bevorzugter Ausführungsformen der Erfindung dient im Zusammenhanng mit beiliegender Zeichnung der weiteren Erläuterung. Es zeigen:

Figur 1
eine schematische Teilschnittansicht einer Stülpfilterzentrifuge;
Figur 2
eine vergrößerte Einzelansicht im Bereich A der Figur 1 und
Figur 3
eine schematische und vergrößerte Teilschnittansicht einer gegenüber Figur 1 abgewandelten Ausführungsform einer Stülpfilterzentrifuge.
The following description of preferred embodiments of the invention is used in conjunction with the accompanying drawing for further explanation. Show it:
Figure 1
a schematic partial sectional view of an inverting filter centrifuge;
Figure 2
an enlarged individual view in area A of Figure 1 and
Figure 3
is a schematic and enlarged partial sectional view of an embodiment of an inverting filter centrifuge modified compared to Figure 1.

Die in Figur 1 schematisch dargestellte Stülpfilterzentrifuge umfasst ein die gesamte Maschine dicht umschließendes Gehäuse 1, in dem auf einem stationären Maschinengestell 2 eine Hohlwelle 3 in Lagern 4 drehbar gelagert ist. Das ( nicht dargestellte ) in Figur 1 rechts gelegene, über ein entsprechendes Lager 4 hinausragende Ende der Hohlwelle 3 ist mit einem ( ebenfalls nicht dargestellten ) Antriebsmotor verbunden, über welchen die Hohlwelle 3 in raschen Umlauf versetzbar ist.The inverting filter centrifuge shown schematically in FIG. 1 comprises the entire machine tightly enclosing housing 1, in which a hollow shaft 3 is rotatably mounted in bearings 4 on a stationary machine frame 2. The end of the hollow shaft 3 (not shown) on the right in FIG. 1, which projects beyond a corresponding bearing 4, is connected to a drive motor (also not shown) via which the hollow shaft 3 can be set in rapid circulation.

Im Inneren der Hohlwelle 3 ist axial verschiebbar eine Welle 5 angeordnet, die mit der Hohlwelle 3 drehfest verbunden ist. Die Welle 5 läuft somit gemeinsam mit der Hohlwelle 3 um, ist in dieser jedoch axial verschieblich.In the interior of the hollow shaft 3, a shaft 5 is arranged axially displaceably, which is connected to the hollow shaft 3 in a rotationally fixed manner. The shaft 5 thus rotates together with the hollow shaft 3, but is axially displaceable in the latter.

An dem in Figur 1 links gelegenen, über das Lager 4 hinausragenden Ende der Hohlwelle 3 ist freitragend und drehfest eine topfförmige Schleudertrommel 7 mit ihrem Boden 8 angeflanscht. An ihrer kreiszylindrischen Seitenwand 9 weist die Trommel 7 radial verlaufende Durchlaßöffnungen 11 auf. An ihrer dem Boden 8 gegenüberliegenden Stirnseite ist die Trommel 7 offen. An dem diese offene Stirnseite umgebenen, flanschartigen Öffnungsrand 12 ist mittels eines Halterings 13 der eine Rand 14 eines im wesentlichen schlauchförmig ausgebildeten Filtertuch 15 dicht eingespannt. Der andere Rand 16 des Filtertuchs 15 ist in entsprechender Weise dicht mit einem Bodenstück 17 verbunden, welches starr mit der verschiebbaren den Boden 8 frei durchdringenden Welle verbunden ist. Das Filtertuch 15 überdeckt die von den Durchlaßlaßöffungen 11 gebildeten Filtratdurchlässe.At the end of the hollow shaft 3 on the left in FIG. 1, projecting beyond the bearing 4, a pot-shaped centrifugal drum 7 is flanged with its bottom 8 in a self-supporting and rotationally fixed manner. The drum 7 has radially extending passage openings 11 on its circular cylindrical side wall 9. The drum 7 is open on its end face opposite the bottom 8. On the flange-like opening edge 12 surrounding this open end face, the one edge 14 of an essentially tubular filter cloth 15 is tightly clamped by means of a retaining ring 13. The other edge 16 of the filter cloth 15 is correspondingly tightly connected to a base piece 17, which is rigidly connected to the displaceable shaft 8 which penetrates freely. The filter cloth 15 covers the filtrate passages formed by the passage openings 11.

An dem Bodenstück 17 ist über starre Stehbolzen 18 unter Freilassung eines Zwischenraumes ein Schleuderraumdeckel 19 starr befestigt, der den Schleuderraum der Trommel 7 durch Auflage an deren Öffnungsrand dicht verschließt und gemeinsam mit dem Bodenstück 17 durch axiales Herausschieben der Welle 5 aus der Hohlwelle 3 von der Trommel 7 frei abgehoben werden kann. Bei einer anderen Ausführungsform kann zu dem gleichen Zweck auch die Trommel 7 relativ zu dem dann stationären Deckel 19 axial verschieblich sein.On the bottom piece 17 is via rigid stud bolts 18 below Release of an intermediate space rigidly fastens a centrifugal chamber cover 19, which tightly closes the centrifugal chamber of the drum 7 by resting on the opening edge thereof and can be lifted freely from the drum 7 together with the base piece 17 by axially pushing the shaft 5 out of the hollow shaft 3. In another embodiment, the drum 7 can also be axially displaceable relative to the then stationary cover 19 for the same purpose.

An der in Figur 1 links gelegenen Vorderseite der Stülpfilterzentrifuge ist ein Füllrohr 21 angeordnet, welches zum Zuführen einer in ihre Feststoff- und Flüssigkeitsbestandteil zu zerlegenden Suspension in den Schleuderraum der Trommel 7 dient. Hierzu weist der Deckel 19 der Trommel 7 eine zentrale Einfüllöffnung 22 auf, durch welche hindurch das freie Ende des Füllrohrs 21 in das Trommelinnere eintritt, und zwar auch dann, wenn der Deckel 19 geschlossen ist.A filling tube 21 is arranged on the left side of the inverting filter centrifuge in FIG. 1, which serves to feed a suspension to be broken down into its solid and liquid components into the centrifugal space of the drum 7. For this purpose, the lid 19 of the drum 7 has a central filling opening 22, through which the free end of the filling tube 21 enters the interior of the drum, even when the lid 19 is closed.

Wie in Figur 1 links dargestellt, ist das Füllrohr 21 in einem stationären, fest mit dem Gehäuse 1 verbundenen, jedoch außerhalb dieses Gehäuses gelegenen Lagerblock 23 mit Hilfe von Drehlagern 24 freitragend und um seine Längsachse drehbar gelagert. Über einen vorzugsweise als Elektromotor ausgebildeten Antriebsmotor 25, einen Riemen 26 und eine drehfest auf dem Füllrohr 21 sitzende Riemenscheibe 27 kann das Füllrohr 21 um seine Längsachse, die mit der Drehachse der Trommel 7 ausgefluchtet ist, in Rotation versetzt werden.As shown in FIG. 1 on the left, the filling tube 21 is supported in a stationary bearing block 23 which is fixedly connected to the housing 1, but is located outside this housing, by means of rotary bearings 24 and is rotatable about its longitudinal axis. The filling tube 21 can be set in rotation about its longitudinal axis, which is aligned with the axis of rotation of the drum 7, by means of a drive motor 25, preferably in the form of an electric motor, a belt 26 and a pulley 27 seated in a rotationally fixed manner on the filling tube 21.

Übliche Wellendichtungen 28 dichten die Außenseite des Füllrohrs 21 im Lagerblock 23 ab. Der Lagerblock 23 weist eine mit einer Rohrleitung verbindbare Einlaßöffnung 29 auf, über welche zu filtrierende Suspension eingeleitet werden kann. Aus der Einfüllöffnung 29 gelangt die Suspension unmittelbar in das Füllrohr 21 und von da in die Trommel 7.Usual shaft seals 28 seal the outside of the filling tube 21 in the bearing block 23. The bearing block 23 has an inlet opening 29 which can be connected to a pipeline and through which the suspension to be filtered can be introduced. The suspension passes directly from the filling opening 29 into the filling tube 21 and from there into the drum 7.

Wie am besten aus der vergrößerten Darstellung der Figur 2 ersichtlich, ist in den Deckel 19 der Trommel 7 zentral und koaxial zur Drehachse der Trommel eine Buchse 31 fest eingesetzt, die zusammen mit der Trommel umläuft. In der Nähe des freien Endes des Einfüllrohres 21 ist innerhalb einer flachen Aussparung des Rohrendes eine ringförmig geschlossene, elastische Membran 32 angeordnet. Über eine in der Wand des Füllrohres 21 verlaufende Leitung 33 kann zwischen die Membran und die im Bereich der Membran gelegene Außenwand des Füllrohres 21 ein pneumatisches oder hydraulisches Druckmedium eingeführt werden. Unter dem Druck des Mediums stülpt sich die Membran 32 radial nach außen und legt sich ringsum an die Innenwand der Buchse 31 an, so daß zwischen Füllrohr 21 und Deckel 19 der Trommel 8 eine vollkommene druckfeste Abdichtung entsteht. Wie aus Figur 1 ersichtlich, mündet die Leitung 33 in eine ringförmige Ausnehmung 34 des Lagerblocks 23, in die über einen Kanal 35 das erwähnte Druckmedium für die Membran 32 eingeleitet werden kann.As can best be seen from the enlarged illustration in FIG. 2, a bushing 31, which rotates together with the drum, is firmly inserted in the cover 19 of the drum 7 centrally and coaxially with the axis of rotation of the drum. In the vicinity of the free end of the filler tube 21, an annularly closed, elastic membrane 32 is arranged within a flat recess in the tube end. A pneumatic or hydraulic pressure medium can be introduced via a line 33 running in the wall of the filling tube 21 between the membrane and the outer wall of the filling tube 21 located in the area of the membrane. Under the pressure of the medium, the membrane 32 turns radially outward and lies all around against the inner wall of the bush 31, so that a perfect pressure-tight seal is produced between the filling tube 21 and the cover 19 of the drum 8. As can be seen from FIG. 1, the line 33 opens into an annular recess 34 in the bearing block 23, into which the pressure medium mentioned for the membrane 32 can be introduced via a channel 35.

In Figur 1 ist die Membran 32 im ausgestülpten Zustand dargestellt, in welchem sie gegen die Buchse 31 abdichtet. Die Figur 2 zeigt oben den gleichen Zustand der Membran 32. In Figur 2 unten ist die Membran in ihrem entspannten drucklosen Zustand gezeigt, in welchem sie aufgrund ihrer Elastizität glatt in die erwähnte Aussparung am Ende des Rohres 21 zurückgezogen ist, so daß zwischen der Hülse 31 und der Membran 32 ringsum ein Abstand verbleibt, der es gestattet, den Deckel 19 frei über das Füllrohr 21 zu verschieben.In Figure 1, the membrane 32 is in the upturned state shown in which it seals against the socket 31. FIG. 2 shows the same state of the membrane 32 at the top. In FIG. 2 below the membrane is shown in its relaxed, depressurized state, in which, due to its elasticity, it is pulled back smoothly into the above-mentioned recess at the end of the tube 21, so that between the sleeve 31 and the membrane 32 all around a distance that allows the lid 19 to move freely over the fill tube 21.

Wie aus Figur 1 hervorgeht, ist zwischen den beiden Wellendichtungen 28 im Lagerblock 23 eine weitere Aussparung 36 mit Auslaßkanal 37 vorgesehen. Über diese Aussparung 36 und diesen Kanal 37 kann notfalls Suspension, welche während des Einfüllvorgangs in geringer Menge hinter die in Figur 1 links gelegene Wellendichtung 28 gelangt ist, ins Freie abgeführt werden.As can be seen from FIG. 1, a further recess 36 with an outlet channel 37 is provided between the two shaft seals 28 in the bearing block 23. If necessary, suspension which has reached the shaft seal 28 on the left in FIG. 1 during the filling process can be discharged into the open via this recess 36 and this channel 37.

Das Füllrohr 21 ist, wie dargestellt, über seine ganze Länge hinweg von einer Rohrleitung 38 durchdrungen, welche starr mit dem Lagerblock 23 verbunden ist, also während der Rotation des Füllrohres 21 stationär verharrt. Die Rohrleitung 38 kann am Lagerblock 23 mit einer Über- oder Unterdruckquelle verbunden werden, so daß im Inneren der geschlossenen Trommel 7 ein Über- oder Unterdruck erzeugt werden kann, gegen den, wie bereits ausgeführt, die von der Buchse 31 und der Membran 32 gebildete Dichtung abdichtet.As shown, the filling pipe 21 is penetrated over its entire length by a pipeline 38 which is rigidly connected to the bearing block 23, that is to say remains stationary during the rotation of the filling pipe 21. The pipeline 38 can be connected to the bearing block 23 with an overpressure or underpressure source, so that an overpressure or underpressure can be generated in the interior of the closed drum 7, against which, as already stated, that formed by the bushing 31 and the membrane 32 Seal seals.

Da das Füllrohr 21 wegen seiner Drehlagerung im Lagerblock 23 zusammen mit der Trommel 7 synchron in Umlauf versetzbar ist, entsteht im Bereich der Einfüllöffnung 22 keine Reibung zwischen Füllrohr 21 und Trommel 7. Das somit auch die Buchse 31 und die Membran 32 synchron rotieren entsteht dort kein Schleifabrieb, welcher zu einer Verunreinigung der Suspension in der Trommel 7 führen könnte. Ein Abrieb könnte allenfalls in geringem Maße an den Wellendichtungen 28 entstehen, er kann dort jedoch über die Ausnehmung 36 und den Kanal 37 ausgespült werden, ohne in die Trommel 7 zu gelangen.Since the filling tube 21 can be put into circulation synchronously with the drum 7 because of its rotary bearing in the bearing block 23, there is no friction between the filling tube 21 and the drum 7 in the area of the filling opening 22. The bushing 31 and the membrane 32 thus also rotate synchronously there no grinding abrasion, which could lead to contamination of the suspension in the drum 7. Abrasion could possibly occur to a small extent on the shaft seals 28, but it can be rinsed out there via the recess 36 and the channel 37 without getting into the drum 7.

Wenn die Trommel 7 geöffnet und dabei der Deckel 19 von der Trommel abgehoben und in die in Figur 1 strichpunktiert dargestellte Stellung überführt wird, wird, wie bereits erwähnt, die Membran 32 in ihre in Figur 2 unten dargestellte entspannte Position verbracht, so daß der Deckel 19 frei und ohne Reibung über das Füllrohr 19 verschoben werden kann. Das freie Ende des axial unverschieblichen Füllrohres 21 tritt dabei in eine Bohrung 39 der Welle 5 ein. ( Die Bohrung 39 ist in Figur 1 aus Platzgründen axial verkürzt dargestellt ).When the drum 7 is opened and the cover 19 is lifted off the drum and transferred to the position shown in broken lines in FIG. 1, the membrane 32 is, as already mentioned, brought into its relaxed position shown in FIG. 2 below, so that the cover 19 can be moved freely and without friction over the filling tube 19. The free end of the axially immovable filling tube 21 enters a bore 39 in the shaft 5. (The bore 39 is shown axially shortened in Figure 1 for reasons of space).

Im Betrieb nimmt die beschriebene Stülpfilterzentrifuge zunächst die in Figur 1 gezeichnete Stellung ein, in welcher über die mit Druckmedium beaufschlagte Membran 32 eine Dichtung zwischen Deckel 19 und Füllrohr 21 hergestellt ist. Die verschiebbare Welle 5 ist in die Hohlwelle 3 zurückgezogen, wodurch das mit der Welle 5 verbundene Bodenstück 17 in der Nähe des Bodens der Schleudertrommel 7 liegt und das Filtertuch 15 derart in die Trommel eingestülpt ist, das es in deren Innerem liegt. Der Schleuderraumdeckel 19 hat sich dabei dicht auf den Öffnungsrand der Trommel 7 aufgelegt. Bei verhältnismäßig langsam rotierender Trommel 7 wird über das Einfüllrohr 21 zu filtrierende Suspension in den Schleuderraum der Trommel eingeführt. Nach Beendigung des Einfüllvorganges wird die Trommel in relativ rasche Rotation versetzt. Die flüssigen Bestandteile der Suspension treten durch die Öffnungen 11 der Trommel 7 hindurch und werden von einem Prallblech 40 abgeleitet. Die Feststoffteilchen der Suspension werden vom Filtertuch 15 in Form des üblichen Filterkuchens aufgehalten.In operation, the inverting filter centrifuge described first assumes the position shown in FIG. 1, in which a seal between the cover 19 and the filling tube 21 is produced via the membrane 32 to which pressure medium is applied. The displaceable shaft 5 is retracted into the hollow shaft 3, as a result of which the shaft 5 connected bottom piece 17 is in the vicinity of the bottom of the centrifugal drum 7 and the filter cloth 15 is inserted into the drum such that it lies inside. The centrifugal chamber cover 19 has placed itself tightly on the opening edge of the drum 7. When the drum 7 rotates relatively slowly, suspension to be filtered is introduced into the centrifugal space of the drum via the filler pipe 21. After the filling process has been completed, the drum is rotated relatively quickly. The liquid components of the suspension pass through the openings 11 of the drum 7 and are derived from a baffle plate 40. The solid particles of the suspension are stopped by the filter cloth 15 in the form of the usual filter cake.

Während des bei rascher Trommelrotation erfolgenden Filtriervorganges kann über die Rohrleitung 38 ein Über- oder Unterdruck im Inneren der Trommel 7 erzeugt werden, gegen welchen die von der Buchse 31 und der Membran 32 gebildete Dichtung abdichtet.During the filtering process taking place with rapid drum rotation, an overpressure or underpressure can be generated in the interior of the drum 7 via the pipeline 38, against which the seal formed by the bushing 31 and the membrane 32 seals.

Nach Beendigung des Filtriervorganges wird bei relativ langsam rotierender Trommel 7 und nach Abschaltung der mit der Leitung 38 verbundenen Druck- oder Unterdruckquelle sowie nach Öffnung des von der Buchse 31 und der Membran 32 gebildeten Abdichtverschlusses ( vgl. Figur 2 unten) die Welle 5 nach links verschoben, wodurch sich das Filtertuch 15, wie in Figur 1 strichpunktiert dargestellt, nach außen umstülpt und die an ihm haftenden Feststoffteilchen nach auswärts in das Gehäuse 1 abgeschleudert werden. In dieser geöffneten Stellung der Trommel 7 dringt das Füllrohr 21 frei an der entspannten Membran 32 vorbei in die Bohrung 39 der Welle 5 ein.At the end of the filtering process, the shaft 5 is turned to the left with the drum 7 rotating relatively slowly and after switching off the pressure or vacuum source connected to the line 38 and after opening the sealing closure formed by the bushing 31 and the membrane 32 (see FIG. 2 below) moved, whereby the filter cloth 15, as in Figure 1 shown in broken lines, turned inside out and the solid particles adhering to it are thrown outwards into the housing 1. In this open position of the drum 7, the filling tube 21 penetrates freely past the relaxed membrane 32 into the bore 39 of the shaft 5.

Nach beendetem Abwurf der Feststoffteilchen wird die Stülpfilterzentrifuge durch Zurückziehen der Welle 5 wieder in ihre geschlossene Betriebsstellung entsprechend Figur 1 verbracht, wobei sich das Filtertuch 15 in entgegengesetzter Richtung zurückstülpt. Auf diese Weise ist ein Betrieb der Zentrifuge mit ständig rotierender Schleudertrommel 7 möglich, wobei die Druckverhältnisse in der Trommel 7 beliebig eingestellt werden können. Dabei sind im Bereich der Einfüllöffnung 22 des Deckels 19 keine schleifenden Teile vorhanden, die einen Abrieb und damit Verunreinigungen der Suspension im Schleuderraum der Trommel 7 erzeugen könnten.After the dropping of the solid particles has ended, the inverting filter centrifuge is brought back into its closed operating position according to FIG. 1 by pulling back the shaft 5, the filter cloth 15 turning back in the opposite direction. In this way, the centrifuge can be operated with a continuously rotating centrifugal drum 7, the pressure conditions in the drum 7 being able to be set as desired. There are no abrasive parts in the area of the fill opening 22 of the lid 19 which could cause abrasion and thus contamination of the suspension in the centrifugal space of the drum 7.

Mit Hilfe des Motors 25, des Riemens 26 und der Riemenscheibe 27 kann das Füllrohr 21 vor dem Schließen des von der Buchse 31 und der Membran 32 gebildete Abdichtverschlusses auf die gleiche Umdrehungszahl wie die Trommel gebracht werden, so daß auch während des Schließens dieses Verschlusses, der zu einer drehfesten Verbindung zwischen Einfüllrohr 21 und Trommel 7 führt, kein unerwünschter Abrieb entstehen kann.With the aid of the motor 25, the belt 26 and the pulley 27, the filling tube 21 can be brought to the same speed as the drum before the sealing closure formed by the bushing 31 and the membrane 32 is closed, so that even during the closure of this closure, which leads to a rotationally fixed connection between filler tube 21 and drum 7, no undesirable abrasion can occur.

Der dargestellte Antrieb des Einfüllrohres 21 über den Motor 25 hat lediglich Symbolcharacter. In der Praxis wird der synchrone Antrieb von Einfüllrohr 21 und Trommel 7 mit an sich bekannten elektrischen oder mechanischen Mitteln realisiert, beispielsweise unter Verwendung frequenzgeregelter Motoren mit gleicher Sollwertvorgabe.The drive of the filler pipe 21 shown via the motor 25 has only symbolic characters. In practice, the synchronous drive of filler pipe 21 and drum 7 is realized with known electrical or mechanical means, for example using frequency-controlled motors with the same setpoint value.

Bei der dargestellten und beschriebenen Ausführungsform ist die ein Element des Abdichtverschlusses der Einfüllöffnung 22 bildende Membran fest mit dem Füllrohr 21 verbunden. Alternativ könnte eine mit einem Druckmedium beaufschlagbare Membran auch innerhalb der Einfüllöffnung 22 verlaufend fest mit dem Deckel 19 der Trommel verbunden sein, so daß sie sich bei Beaufschlagung mit Druckmedium konzentrisch ringsum an die Außenwand des Einfüllrohres 21 anlegt. In diesem Falle muß die Zuführung des die Membran beaufschlagenden Druckmediums über die Drucktrommel 7 erfolgen. Dies ist in Figur 1 durch einen gestrichelt dargestellten Kanal 41 angedeutet, welcher durch die Welle 5, das Bodenstück 17, den Stehbolzen 18 und den Deckel 19 zur Membran hin verläuft.In the illustrated and described embodiment, the membrane forming an element of the sealing closure of the filling opening 22 is firmly connected to the filling tube 21. Alternatively, a membrane to which a pressure medium can be applied could also be permanently connected to the cover 19 of the drum within the filling opening 22, so that it presses concentrically around the outer wall of the filling tube 21 when pressure medium is applied. In this case, the pressure medium acting on the membrane must be supplied via the printing drum 7. This is indicated in FIG. 1 by a channel 41 shown in broken lines, which runs through the shaft 5, the base piece 17, the stud bolt 18 and the cover 19 towards the membrane.

Die der Erzeugung eines Über- oder Unterdrucks dienende Rohrleitung 38 im Inneren des Füllrohres 21 kann durch eine Rohrleitung 42 ersetzt werden, welche in der Welle 5 ausgebildet und in Figur 1 ebenfalls gestrichelt angedeutet ist.The pipeline 38 serving to generate an overpressure or underpressure in the interior of the filling tube 21 can be replaced by a pipeline 42 which is formed in the shaft 5 and is also indicated by dashed lines in FIG.

Die Figur 3 zeigt einen Lagerblock 43 einer abgewandtelten Ausführungform einer Stülpfilterzentrifuge, wobei der Lagerblock 43 dem Lagerblock 23 in Figur 1 entspricht. Einander gleiche Teile sind in Figur 1 und 3 mit den gleichen Bezugszeichen bezeichnet.FIG. 3 shows a bearing block 43 of a modified one Embodiment of an inverting filter centrifuge, wherein the bearing block 43 corresponds to the bearing block 23 in Figure 1. Parts that are identical to one another are identified by the same reference numerals in FIGS. 1 and 3.

Wie in Figur 3 dargestellt, weist das Füllrohr 44 rückseitig einen Stirnflansch 45 auf. An die freie Endfläche des Flansches 45 kann eine ringförmige Membrandichtung 46 abdichtend angelegt werden werden, wenn diese Membrandichtung rückseitig über eine im Lagerblock 43 ausgebildete Leitung 47 mit einem Druckmedium beaufschlagt wird. Die Membrandichtung 46 ist ihrerseits ebenfalls in einer entsprechenden, zum Stirnflansch 45 hin offenen, ringförmigen Aussparung 48 des Lagerblocks 43 angeordnet.As shown in FIG. 3, the filling tube 44 has an end flange 45 on the rear. An annular membrane seal 46 can be sealingly applied to the free end surface of the flange 45 if this membrane seal is acted upon on the rear side by a pressure medium formed in the bearing block 43 with a pressure medium. The membrane seal 46 is in turn also arranged in a corresponding annular recess 48 of the bearing block 43 which is open towards the end flange 45.

Es hat sich gezeigt, daß ein ständig zusammen mit der Trommel 7 um seine Längsachse rotierendes Füllrohr 44 unzweckmäßig sein kann, wenn sich bei besonders empfindlichen Suspensionen deren Feststoffteilchen bereits während des Einfüllens der Suspension in die Trommel 7 an der Wand des umlaufenden Füllrohres 44 absetzen können. In solchen Fällen ist es günstig, das Füllrohr 44 während des Füllvorganges still zu setzen, was bei weiter rotierender Trommel 7 ohne weiteres möglich ist, wenn die von der Buchse 31 und der Membran 32 gebildete Dichtung in der zuvor beschriebenen Weise geöffnet wird. Bei stehendem Füllrohr 44 kann jedoch die elastische Membrandichtung 46 ohne weiteres in Anlage an den Stirnflansch 45 gebracht werden. Auf diese Weise ist zuverlässig verhindert, daß eingefüllte Suspension in den Bereich der wellendichtung 28 gelangt. Wenn während des Filtriervorganges die von der Buchse 31 und der Membran 32 gebildete Abdichtung geschlossen ist und das Füllrohr 44 gemeinsam mit der Trommel 7 umläuft, befindet sich die Membrandichtung 46 im geöffneten, also vom Stirnflansch 45 des Füllrohres abgelöstem Zustand, so daß kein unerwünschter Abrieb zwischen Membrandichtung 46 und Füllrohr 44 auftreten kann.It has been shown that a constantly rotating together with the drum 7 about its longitudinal axis filling tube 44 may be unsuitable if, in the case of particularly sensitive suspensions, their solid particles can already settle on the wall of the rotating filling tube 44 during the filling of the suspension into the drum 7 . In such cases, it is expedient to shut down the filling pipe 44 during the filling process, which is readily possible if the drum 7 continues to rotate if the seal formed by the bushing 31 and the membrane 32 is opened in the manner described above. When the filler tube 44 is stationary, however, the elastic membrane seal 46 can be brought into abutment against the end flange 45. In this way it is reliably prevented filled suspension reaches the area of the shaft seal 28. If, during the filtering process, the seal formed by the bushing 31 and the membrane 32 is closed and the filling tube 44 rotates together with the drum 7, the membrane seal 46 is in the opened state, that is to say detached from the end flange 45 of the filling tube, so that no undesired abrasion can occur between the membrane seal 46 and 44 filler tube.

Bei den beschriebenen Ausführungsformen von Stülpfilterzentrifugen sind die Abdichtungen ( Buchse 31, Membran 32; Dichtung 46 ) als Membrandichtungen ausgebildet. Es ist offensichtlich, daß solche Membrandichtungen auch durch andere Verschlußelemente in Form pneumatisch oder hydraulisch betätigbarer elastischer Quetschdichtungen, beispielsweise auch in Schlauchform ersetzt werden können.In the described embodiments of inverting filter centrifuges, the seals (socket 31, membrane 32; seal 46) are designed as membrane seals. It is obvious that such membrane seals can also be replaced by other closure elements in the form of pneumatically or hydraulically actuated elastic pinch seals, for example also in the form of a tube.

Claims (10)

  1. A reversible-filter centrifuge having a drum (7) which is pivoted in a self-supporting manner in a housing (1), comprises radial filtrate openings (11) and can be impinged with over-pressure or under-pressure, having a lid (19) closing the free end side of the drum, with the drum and lid being axially displaceable in relation to one another, having a filling aperture (22) provided on the lid for suspension to be filtered and having a filling pipe (21) penetrating the filling aperture in sealed manner,
    characterised in that the filling pipe (21) is pivoted around its longitudinal axis and together with the drum (7) can be brought to rotate around this axis.
  2. A reversible-filter centrifuge according to Claim 1,
    characterised in that the filling pipe (21) can be rotationally driven by a drive mechanism (25, 26, 27) roughly synchronously to the drum (7).
  3. A reversible-filter centrifuge according to Claim 1,
    characterised in that to achieve the seal between filling aperture (22) and filling pipe (21) a closure component (32) is provided which can be controlled to and fro as desired between an open and closed position.
  4. A reversible-filter centrifuge according to Claim 3,
    characterised in that the closure component (32) is connected to the filling pipe (21).
  5. A reversible-filter centrifuge according to Claim 3,
    characterised in that the closure component is a pneumatically or hydraulically operated elastic squeezing seal.
  6. A reversible-filter centrifuge according to Claim 5,
    characterised in that the squeezing seal is constructed as an annular membrane (32).
  7. A reversible-filter centrifuge according to Claim 1,
    characterised in that the filling pipe (31) is pivoted in a bearing block (23) disposed spaced from the filling aperture (22) outside the drum (7).
  8. A reversible-filter centrifuge according to Claim 7,
    characterised in that an outlet duct (37) for leaking suspension is provided in the bearing block (23).
  9. A reversible-filter centrifuge according to Claim 7,
    characterised in that a sealing component (46), which can be controlled to and * as desired between an open and a closed position, and which, when the filling pipe (44) does not rotate, seals its from the bearing block (43), is disposed between filling pipe (44) and bearing block (43).
  10. A reversible-filter centrifuge according to Claim 9,
    characterised in that an elastic membrane seal (46) is provided as the controllable sealing component between the end side (45) of the filling pipe (44) remote from the filling aperture and the bearing block (43).
EP90914387A 1990-09-24 1990-09-24 Reverse filter centrifugal machine Expired - Lifetime EP0551252B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1990/001617 WO1992004982A1 (en) 1990-09-24 1990-09-24 Reverse filter centrifugal machine

Publications (2)

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EP0551252A1 EP0551252A1 (en) 1993-07-21
EP0551252B1 true EP0551252B1 (en) 1995-06-07

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EP90914387A Expired - Lifetime EP0551252B1 (en) 1990-09-24 1990-09-24 Reverse filter centrifugal machine

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US (1) US5304306A (en)
EP (1) EP0551252B1 (en)
JP (1) JP3174320B2 (en)
KR (1) KR0150415B1 (en)
CN (1) CN1036839C (en)
AT (1) ATE123425T1 (en)
DE (1) DE59009219D1 (en)
DK (1) DK0551252T3 (en)
ES (1) ES2073038T3 (en)
RU (1) RU2096093C1 (en)
WO (1) WO1992004982A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004082843A1 (en) * 2003-03-19 2004-09-30 Johannes Gerteis Inverting filter centrifuge
EP2481483A2 (en) 2011-02-01 2012-08-01 CONTECMA C.S. GmbH Inverting filter centrifuge

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2092136T3 (en) * 1991-05-04 1996-11-16 Heinkel Ind Zentrifugen INVESTMENT FILTER CENTRIFUGAL MACHINE.
DE4230261A1 (en) * 1991-10-01 1993-04-08 Krauss Maffei Ag DISCONTINUOUS FILTER CENTRIFUGE
DE4337618C1 (en) * 1993-11-04 1995-02-16 Krauss Maffei Ag Inverted filter centrifuge (seal for drum space)
DE4342471C1 (en) * 1993-12-13 1995-05-04 Krauss Maffei Ag Filter centrifuge
DE19525567A1 (en) * 1995-07-13 1997-01-16 Krauss Maffei Ag Inverting filter centrifuge
DE19705788C1 (en) * 1997-02-14 1998-07-30 Guenther Hultsch Centrifugal filter with washing pressurisation and drying systems for batch operation, with filter bag and cake ejection
DE19732006C1 (en) * 1997-07-25 1998-11-19 Heinkel Ind Zentrifugen Drum centrifuge with continuous weight measurement indicating filling and degree of de-watering
DE10115381A1 (en) * 2001-03-28 2002-10-24 Heinkel Ag inverting filter centrifuge
CN102357433A (en) * 2011-09-08 2012-02-22 安徽普源分离机械制造有限公司 Horizontal type full-automatic ball-pulling centrifugal machine
CN105664562A (en) * 2016-02-01 2016-06-15 苏州拓维工程装备有限公司 Rotary-drum-type filter press
MX2020006580A (en) * 2017-12-19 2020-12-10 Xeros Ltd Filter for a treatment apparatus.
CN111686944A (en) * 2020-06-24 2020-09-22 台州职业技术学院 FWZ type bag-turning type centrifugal machine, control method and application

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1205461B (en) * 1962-06-30 1965-11-18 Krauss Maffei Ag Pusher centrifuge
DE3740411C2 (en) * 1987-11-28 1996-11-14 Heinkel Ind Zentrifugen Inverting filter centrifuge
DE3916266C1 (en) * 1989-05-19 1990-08-30 Heinkel Industriezentrifugen Gmbh + Co, 7120 Bietigheim-Bissingen, De
US5004540A (en) * 1989-12-01 1991-04-02 Ketema Process Equipment Division Invertible filter-type centrifuge with improved bearing and seal assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004082843A1 (en) * 2003-03-19 2004-09-30 Johannes Gerteis Inverting filter centrifuge
CN100408194C (en) * 2003-03-19 2008-08-06 约翰内斯·格泰斯 Inverting filter centrifuge
EP2481483A2 (en) 2011-02-01 2012-08-01 CONTECMA C.S. GmbH Inverting filter centrifuge
DE102011010072A1 (en) 2011-02-01 2012-08-02 Contecma C. S. Gmbh inverting filter centrifuge
DE102011010072B4 (en) * 2011-02-01 2013-08-22 Contecma C. S. Gmbh inverting filter centrifuge
EP2481483A3 (en) * 2011-02-01 2015-04-15 CONTECMA C.S. GmbH Inverting filter centrifuge

Also Published As

Publication number Publication date
KR930702077A (en) 1993-09-08
DK0551252T3 (en) 1995-08-21
DE59009219D1 (en) 1995-07-13
US5304306A (en) 1994-04-19
CN1036839C (en) 1997-12-31
JPH06502339A (en) 1994-03-17
ATE123425T1 (en) 1995-06-15
KR0150415B1 (en) 1998-10-15
WO1992004982A1 (en) 1992-04-02
ES2073038T3 (en) 1995-08-01
CN1060232A (en) 1992-04-15
EP0551252A1 (en) 1993-07-21
RU2096093C1 (en) 1997-11-20
JP3174320B2 (en) 2001-06-11

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