EP0472554B2 - Inverted filter centrifuge - Google Patents

Inverted filter centrifuge Download PDF

Info

Publication number
EP0472554B2
EP0472554B2 EP90906988A EP90906988A EP0472554B2 EP 0472554 B2 EP0472554 B2 EP 0472554B2 EP 90906988 A EP90906988 A EP 90906988A EP 90906988 A EP90906988 A EP 90906988A EP 0472554 B2 EP0472554 B2 EP 0472554B2
Authority
EP
European Patent Office
Prior art keywords
drum
cover
feed opening
closure element
feed
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
Application number
EP90906988A
Other languages
German (de)
French (fr)
Other versions
EP0472554A1 (en
EP0472554B1 (en
Inventor
Hans Gerteis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heinkel Industriezentrifugen GmbH and Co
Original Assignee
Heinkel Industriezentrifugen GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6380933&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0472554(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Heinkel Industriezentrifugen GmbH and Co filed Critical Heinkel Industriezentrifugen GmbH and Co
Priority to AT90906988T priority Critical patent/ATE95446T1/en
Publication of EP0472554A1 publication Critical patent/EP0472554A1/en
Application granted granted Critical
Publication of EP0472554B1 publication Critical patent/EP0472554B1/en
Publication of EP0472554B2 publication Critical patent/EP0472554B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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 housing and has radial filter passages, with a cover which closes the free end face thereof, the drum and cover being axially displaceable relative to one another, with a filling opening provided on the cover for suspension to be filtered and with a the filler tube penetrating the filler opening, the filler opening of the cover being closable by a closure element which rotates together with the drum.
  • the locking element at the filling opening of the lid is merely a splash guard which prevents liquid from splashing out of the drum.
  • inverting filter centrifuges it is sometimes advantageous to supply the drum with a pressurized gas (for example superheated steam) in order to increase the hydraulic pressure in the centrifugal field of the drum or to blow the filter cake through for the purpose of drying it or to subject it to steam washing Alternatively, it may also be desirable to pressurize the drum.
  • a pressurized gas for example superheated steam
  • the filling tube is designed to be retractable from the filling opening of the lid and, when the filling tube is retracted, the filling opening can be closed in a pressure-tight manner by the closure element arranged on the lid and avoiding a frictional connection, or in that a movable closure element is provided which during of the centrifuging process from the inside of the drum is pressure-tight and can be placed over the filling opening of the lid and the end of the filling tube, avoiding a frictional connection.
  • the invertible filter centrifuge shown in FIG. 1 comprises a housing 1, which is only indicated schematically and which tightly encloses the entire machine, in which a hollow shaft 3 is rotatably mounted in bearings 4 on a stationary machine frame 2.
  • the right-hand end (not shown) of the hollow shaft 3 projecting beyond the bearing 4 is connected to a drive motor (also not shown) via which the hollow shaft 3 can be set in rapid rotation.
  • a shaft 5 is arranged in a rotationally fixed but displaceable manner.
  • the shaft 5 rotates together with the hollow shaft 3, but is axially displaceable in it.
  • a pot-shaped centrifugal drum 7 is flanged with its base 8 on the left end of the hollow shaft 3 in FIG. 1, projecting beyond the bearing 4.
  • 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.
  • 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, displaceable shaft 5 which freely penetrates the bottom 8.
  • a centrifugal chamber cover 19 is rigidly fastened via stud bolts 18, leaving a space free, which tightly closes the centrifugal chamber of the drum 7 by resting on its opening edge and together with the bottom part 17 by axially pushing the shaft 5 out of the hollow shaft 3 free of Drum 7 can be lifted off.
  • the drum 7 can also be axially displaceable relative to the 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 supply a suspension to be broken down into its solid and liquid components into the centrifugal space of the drum 7.
  • the free end of the filling tube 21 is introduced into the interior of the drum through a central filling opening 22 of the cover 19 and, after the drum has been filled, is drawn back into the position shown in FIG.
  • the filling opening 22 is formed by a pinch valve 25, which is known per se and is formed by a hose 23 lockable. Via a line 26 penetrating the shaft 5, the stud 18 and the cover 19, the interior of the hose 23 can be filled with a hydraulic or pneumatic pressure medium, as a result of which the pinch valve 25 is closed in a pressure-tight manner. This state is shown in Fig. 2.
  • the filling tube 21 in the position shown in FIG. 1 can penetrate into a bore 27 of the shaft 5 through the now opened pinch valve 25 in a space-saving manner.
  • the pinch valve 25 is designed so that there is practically no friction between the hose 23 and the filling tube 21 in its open state.
  • the pinch valve 25 described can also be replaced by a valve of a different type, for example a ball valve or a slide valve, as long as it is ensured that such a sealing element, which rotates together with the drum 7, closes the drum tightly at the filling opening 22 and, when open, prevents the filling tube 21 from penetrating allowed without friction.
  • a valve of a different type for example a ball valve or a slide valve
  • the inverting filter centrifuge initially assumes the position shown in FIG. 1.
  • the displaceable shaft 5 is retracted into the hollow shaft 3, as a result of which the bottom piece 17 connected to the shaft 5 lies in the vicinity of the bottom 8 of the centrifugal drum 7 and the filter cloth 15 is inserted into the drum in such a way that it lies inside it.
  • the centrifugal chamber cover 19 has placed itself tightly on the opening edge of the drum 7.
  • the suspension to be filtered is introduced through the filling tube 21 which is pushed through the open pinch valve.
  • the pinch valve 25 is closed and the drum is possibly rotated more rapidly.
  • the liquid components of the suspension pass through the openings 11 of the drum and are derived from a baffle plate 28.
  • the solid particles of the suspension are stopped by the filter cloth 15.
  • an overpressure can be generated inside the drum 7 via a line 29 formed in the shaft 5. If necessary, the formation of negative pressure in the interior of the drum is also possible via this line 29. In other cases, the change in the internal pressure in the drum 7 can also be omitted. Nevertheless, it can be important to close the fill opening 22 tightly by means of the pinch valve 25 or another closure element.
  • the inverting filter centrifuge After the dropping off of the solid particles under the influence of the centrifugal force, the inverting filter centrifuge is brought back into its operating position according to FIG. 1 by pushing back the shaft 5, the filter cloth 15 turning back in the opposite direction. In this way, operation of the centrifuge with a continuously rotating centrifugal drum 7 is possible and the pressure conditions in the drum 7 can be set as desired.
  • FIG. 3 shows a modified embodiment of an inverting filter centrifuge.
  • the shaft 5 in the embodiment according to FIG. 3 is also designed as a hollow shaft.
  • a piston rod-shaped closure element 32 is displaceable into the interior of the drum 7 in such a way that it seals the filling opening 22 from the inside of the drum.
  • a line 33 is formed in the closure element 32, with the aid of which a negative or positive pressure can be generated inside the drum 7.
  • the closure element 32 can be actuated hydraulically or pneumatically in a manner known per se. In order to produce a pressure-tight closure, the end of the closure element 32 resting on the inside of the centrifugal chamber cover 19 has a seal 34.
  • the closure element 32 is formed at its free front end as a sleeve 35, in the interior of which the end of the filling tube 21 protruding into the drum 7 can penetrate.
  • FIG. 3 The embodiment of an inverting filter centrifuge according to FIG. 3 works in the same way as previously described with reference to the embodiment according to FIG. 1.
  • the filling tube 21 does not need to be pushed back and forth in the embodiment according to FIG. 3, but can be rigidly connected to the machine frame 2 in this respect.
  • the closure element 32 is withdrawn (to the right in FIG. 3) so that the opening of the filler tube 21 is exposed.
  • the closure element 32 assumes the position shown in FIG. 3.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

An inverted filter centrifuge consists of a drum (7) arranged to rotate freely in a housing (1) and having radial filtrate outlets; a cover (19) closing one of its free frontal areas, the drum (7) and the cover (19) being mutually axially movable; a filler aperture (22) in the cover for the suspension to be filtered and a filler pipe (21) passing through the filler aperture. The filler aperture (22) in the cover (19) can be hermetically sealed by a locking component (25) rotating together with the drum which is disconnected from the filler pipe (21) in a manner to avoid friction.

Description

Die Erfindung betrifft eine Stülpfilterzentrifuge mit einer in einem Gehäuse frei tragend gelagerten, radiale Filterdurchlässe aufweisenden Trommel, mit einem deren freien Stirnseite 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 durchdringenden Füllrohr, wobei die Einfüllöffnung des Deckels durch ein zusammen mit der Trommel umlaufendes Verschlußelement verschließbar ist.The invention relates to an inverting filter centrifuge with a drum which is supported in a housing and has radial filter passages, with a cover which closes the free end face thereof, the drum and cover being axially displaceable relative to one another, with a filling opening provided on the cover for suspension to be filtered and with a the filler tube penetrating the filler opening, the filler opening of the cover being closable by a closure element which rotates together with the drum.

Bei einer bekannten Stülpfilterzentrifuge dieser Art (DE-A 34.30. 507) ist das Verschlupelement an der Einfüllöffnung des Deckels lediglich ein Spritzschutz, der das Herausspritzen von Flüssigkeit aus der Trommel verhindert.In a known inverting filter centrifuge of this type (DE-A 34.30. 507), the locking element at the filling opening of the lid is merely a splash guard which prevents liquid from splashing out of the drum.

Bei solchen Stülpfilterzentrifugen ist es manchmal vorteilhaft, die Trommel mit einem unter Überdruckstehenden Gas (beispielsweise Heißdampf zu besufschlagen, um den im Fliehkraftfeld der Trommel stehenden, hydraulischen Druck zu erhöhen oder um den Filterkuchen zum Zwecke seiner Trocknung durchzublasen oder auch um ihn einer Dampfwäsche zu unterziehen. Ferner kann es alternativ auch erwünscht sein, die Trommel unter Unterdruck zu setzen.In the case of such inverting filter centrifuges, it is sometimes advantageous to supply the drum with a pressurized gas (for example superheated steam) in order to increase the hydraulic pressure in the centrifugal field of the drum or to blow the filter cake through for the purpose of drying it or to subject it to steam washing Alternatively, it may also be desirable to pressurize the drum.

Eine derartige Druckvariation im Innenraum der Trommel ist bei einer gattungsgemäßen Stülpfilterzentrifuge nicht möglich, da dort das die Einfüllöffnung durchdringende Füllrohr nicht druckdicht abgedichtet ist.Such a pressure variation in the interior of the drum is not possible with a generic inverting filter centrifuge, since there the filling tube penetrating the filling opening is not sealed in a pressure-tight manner.

Es ist Aufgabe der Erfindung, eine gattungsgemäße Stülpfilterzentrifuge so zu verbessern, daß der von der Trommel umschlossene Schleuderraum mit Über- oder Unterdruck beaufschlagt werden kann.It is an object of the invention to improve a generic inverting filter centrifuge so that the centrifugal space enclosed by the drum can be acted upon by overpressure or underpressure.

Die Aufgabe wird erfindungsgemäß entweder dadurch gelöst, daß das Füllrohr von der Einfüllöffnung des Deckels zurückziehbar ausgebildet und bei zurückgezogenem Füllrohr die Einfüllöffnung durch das am Deckel angeordnete Verschlußelement druckdicht und unter Vermeidung eines Reibschlusses verschließbar ist oder dadurch, daß ein bewegliches Verschlußelement vorgesehen ist, das während des Schleudervorgangs von der Trommelinnenseite her druckdicht und unter Vermeidung eines Reibschlusses über die Einfüllöffnung des Deckels und das Ende des Füllrohrs aufsetzbar ist.The object is achieved either in that the filling tube is designed to be retractable from the filling opening of the lid and, when the filling tube is retracted, the filling opening can be closed in a pressure-tight manner by the closure element arranged on the lid and avoiding a frictional connection, or in that a movable closure element is provided which during of the centrifuging process from the inside of the drum is pressure-tight and can be placed over the filling opening of the lid and the end of the filling tube, avoiding a frictional connection.

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

Figur 1
eine schematische Teilschnittansicht einer Stülpfilterzentrifuge;
Figur 2
eine Ansicht in Richtung des Pfeiles A in Figur 1 und
Figur 3
eine schematische Teilschnittansicht ähnlich Figur 1 einer anderen Ausführungsform einer Stülpfilterzentrifuge.
The following description of preferred embodiments of the invention serves in conjunction with the accompanying drawings for further explanation. Show it:
Figure 1
a schematic partial sectional view of an inverting filter centrifuge;
Figure 2
a view in the direction of arrow A in Figure 1 and
Figure 3
a schematic partial sectional view similar to Figure 1 of another embodiment of an inverting filter centrifuge.

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

Im Innern der Hohlwelle 3 ist drehfest, jedoch verschiebbareine Welle 5 angeordnet. Die Welle 5 läuft gemeinsam mit der Hohlwelle 3 um, ist jedoch in dieser axial verschieblich.Inside the hollow shaft 3, a shaft 5 is arranged in a rotationally fixed but displaceable manner. The shaft 5 rotates together with the hollow shaft 3, but is axially displaceable in it.

An dem in Fig. 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 umgebenden, flanschartigen Öffnungsrand 12 ist mittels eines Halterings 13 dereine Rand 14 eines im wesentlichen schlauchförmig ausgebildeten Filtertuchs 15 dicht eingespannt. Der andere Rand 16 des Filtertuches 15 ist in entsprechender Weise dicht mit einem Bodenstück 17 verbunden, welches starr mit der verschiebbaren, den Boden 8 frei durchdringenden, verschiebbaren Welle 5 verbunden ist.A pot-shaped centrifugal drum 7 is flanged with its base 8 on the left end of the hollow shaft 3 in FIG. 1, projecting beyond the bearing 4. 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, 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, displaceable shaft 5 which freely penetrates the bottom 8.

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

An der in Fig. 1 links gelegenen Vorderseite der Stülpfilterzentrifuge istein Füllrohr 21 angeordnet, welches zum Zuführen einer in ihre Feststoff- und Flüssigkeitsbestandteile zu zerlegenden Suspension in den Schleuderraum der Trommel 7 dient.A filling tube 21 is arranged on the left side of the inverting filter centrifuge in FIG. 1, which serves to supply a suspension to be broken down into its solid and liquid components into the centrifugal space of the drum 7.

Das freie Ende des Füllrohrs 21 wird hierzu durch eine zentrale Einfüllöffnung 22 des Deckels 19 in das Trommelinnere eingeführt und nach der Befüllung der Trommel wieder in die in Fig. 1 dargestellte Position zurückgezogen.For this purpose, the free end of the filling tube 21 is introduced into the interior of the drum through a central filling opening 22 of the cover 19 and, after the drum has been filled, is drawn back into the position shown in FIG.

Die Einfüllöffnung 22 ist durch ein von einem Schlauch 23 gebildetes, an sich bekanntes Quetschventil 25 verschließbar. Über eine die Welle 5, den einen Stehbolzen 18 und den Deckel 19 durchdringende Leitung 26 kann der Innenraum des Schlauches 23 mit einem hydraulischen oder pneumatischen Druckmittel gefüllt werden, wodurch das Quetschventil 25 druckdicht geschlossen ist. Dieser Zustand ist in Fig. 2 dargestellt.The filling opening 22 is formed by a pinch valve 25, which is known per se and is formed by a hose 23 lockable. Via a line 26 penetrating the shaft 5, the stud 18 and the cover 19, the interior of the hose 23 can be filled with a hydraulic or pneumatic pressure medium, as a result of which the pinch valve 25 is closed in a pressure-tight manner. This state is shown in Fig. 2.

Beim Öffnen der Trommel 7, also beim Abheben des Deckels 19 vom Trommelrand durch Verschieben der Welle 5 kann das in der Position gemäß Fig. 1 befindliche Füllrohr 21 durch das nunmehr geöffnete Quetschventil 25 hindurch platzsparend in eine Bohrung 27 der Welle 5 eindringen. Das Quetschventil 25 ist so ausgebildet, daß in seinem Öffnungszustand praktisch keine Reibung zwischen dem Schlauch 23 und dem Füllrohr 21 vorliegt.When the drum 7 is opened, that is to say when the cover 19 is lifted off the edge of the drum by moving the shaft 5, the filling tube 21 in the position shown in FIG. 1 can penetrate into a bore 27 of the shaft 5 through the now opened pinch valve 25 in a space-saving manner. The pinch valve 25 is designed so that there is practically no friction between the hose 23 and the filling tube 21 in its open state.

Das beschriebene Quetschventil 25 kann auch durch ein Ventil anderer Art ersetztwerden, beispielsweise ein Kugelventil oderein Schieberventil, solange gewährleistet ist, daß ein solches, gemeinsam mit der Trommel 7 umlaufendes Verschlußelement die Trommel an der Einfüllöffnung 22 dicht verschließt und im Öffnungszustand ein Eindringen des Füllrohres 21 ohne Reibschluß gestattet.The pinch valve 25 described can also be replaced by a valve of a different type, for example a ball valve or a slide valve, as long as it is ensured that such a sealing element, which rotates together with the drum 7, closes the drum tightly at the filling opening 22 and, when open, prevents the filling tube 21 from penetrating allowed without friction.

Im Betrieb nimmt die Stülpfilterzentrifuge zunächst die in Fig. 1 gezeichnete Stellung ein. Die verschiebbare Welle 5 ist in die Hohlwelle 3 zurückgezogen, wodurch das mit der Welle 5 verbundene Bodenstück 17 in der Nähe des Bodens 8 der Schleudertrommel 7 liegt und das Filtertuch 15 derart in die Trommel eingestülpt ist, daß es in deren Innerem liegt. Der Schleuderraumdeckel 19 hat sich dabei dicht auf den Öffnungsrand der Trommel 7 aufgelegt. Bei rotierender Trommel 7 und geöffnetem Quetschventil 25 wird über das durch das geöffnete Quetschventil hindurchgeschobene Einfüllrohr 21 zu filtrierende Suspension eingeführt. Nach Zurückziehung des Füllrohrs 21 wird das Quetschventil 25 geschlossen und die Trommel gegebenenfalls in raschere Rotation versetzt. Die flüssigen Bestandteile der Suspension treten durch die Öffnungen 11 der Trommel hindurch und werden von einem Prallblech 28 abgeleitet. Die Feststoffteilchen der Suspension werden vom Filtertuch 15 aufgehalten.In operation, the inverting filter centrifuge initially assumes the position shown in FIG. 1. The displaceable shaft 5 is retracted into the hollow shaft 3, as a result of which the bottom piece 17 connected to the shaft 5 lies in the vicinity of the bottom 8 of the centrifugal drum 7 and the filter cloth 15 is inserted into the drum in such a way that it lies inside it. The centrifugal chamber cover 19 has placed itself tightly on the opening edge of the drum 7. With the drum 7 rotating and the pinch valve 25 open, the suspension to be filtered is introduced through the filling tube 21 which is pushed through the open pinch valve. After the filling tube 21 has been withdrawn, the pinch valve 25 is closed and the drum is possibly rotated more rapidly. The liquid components of the suspension pass through the openings 11 of the drum and are derived from a baffle plate 28. The solid particles of the suspension are stopped by the filter cloth 15.

Während dieses Vorganges kann über eine in der Welle 5 ausgebildete Leitung 29 ein Überdruck im Innern der Trommel 7 erzeugt werden. Bedarfsweise ist auch die Ausbildung von Unterdruck im Trommelinnern über diese Leitung 29 möglich. In anderen Fällen kann die Veränderung des Innendrucks in der Trommel 7 auch unterbleiben. Dennoch kann es wichtig sein, die Einfüllöffnung 22 durch das Quetschventil 25 oder ein anderes Verschlußelement dicht zu verschließen.During this process, an overpressure can be generated inside the drum 7 via a line 29 formed in the shaft 5. If necessary, the formation of negative pressure in the interior of the drum is also possible via this line 29. In other cases, the change in the internal pressure in the drum 7 can also be omitted. Nevertheless, it can be important to close the fill opening 22 tightly by means of the pinch valve 25 or another closure element.

Nach Beendigung des Filtriervorganges wird bei weiterhin rotierender Schleudertrommel 7 und nunmehr geöffnetem Quetschventil 25 (sowie gegebenenfalls abgeschalteter Druck- oder Unterdruckquelle) die Welle 5 nach links verschoben, wodurch sich das Filtertuch 15 nach außen umstülpt und die an ihm haftenden Feststoffteilchen nach auswärts in das Gehäuse 1 abgeschleudert werden. Von da aus können sich leicht abgefördert werden. In dieser Stellung der Trommel 7 dringt das Füllrohr 21 durch das jetzt geöffnete Quetschventil 25 reibungsfrei in die Bohrung 27 der Welle 5 ein.After completion of the filtering process, with the centrifugal drum 7 still rotating and the pinch valve 25 now open (as well as any pressure or vacuum source switched off), the shaft 5 is shifted to the left, as a result of which the filter cloth 15 is turned inside out and the solid particles adhering to it outward into the housing 1 are thrown out. From there it can be easily removed. In this position of the drum 7, the filling tube 21 penetrates into the bore 27 of the shaft 5 without friction through the now opened pinch valve 25.

Nach beendetem Abwurf der Feststoffteilchen unter dem Einfluß der Zentrifugalkraft wird die Stülpfilterzentrifuge durch Zurückschieben der Welle 5 wieder in ihre Betriebsstellung entsprechend Fig. 1 gebracht, wobei sich das Filtertuch 15 in entgegengesetzter Richtung zurückstülpt. Auf diese Weise ist ein Betrieb der Zentrifuge mit ständig rotierender Schleudertrommel 7 möglich und die Druckverhältnisse in der Trommel 7 können beliebig eingestellt werden.After the dropping off of the solid particles under the influence of the centrifugal force, the inverting filter centrifuge is brought back into its operating position according to FIG. 1 by pushing back the shaft 5, the filter cloth 15 turning back in the opposite direction. In this way, operation of the centrifuge with a continuously rotating centrifugal drum 7 is possible and the pressure conditions in the drum 7 can be set as desired.

Die Fig. 3 zeigt eine abgewandelte Ausführungsform einer Stülpfilterzentrifuge. In Fig. 3 sind einander entsprechende Teile mit den gleichen Bezugszeichen wie in Fig. 1 bezeichnet. Im Unterschied zu Fig. 1 ist bei der Ausführungsform nach Fig. 3 die Welle 5 ebenfalls als Hohlwelle ausgebildet. In der Innenbohrung 31 dieser Hohlwelle 5 ist ein kolbenstangenförmiges Verschlußelement 32 in das Innere der Trommel 7 hinein derart verschieblich, daß es die Einfüllöffnung 22 von der Innenseite der Trommel herdichtverschließt. Im Verschlußelement 32 ist eine Leitung 33 ausgebildet, mit deren Hilfe im Innern der Trommel 7 ein Unter- oder Überdruck erzeugt werden kann. Das Verschlußelement 32 kann hydraulisch oder pneumatisch in an sich bekannter Weise betätigt werden. Zur Herstellung eines druckdichten Verschlusses weist das an der Innenseite des Schleuderraumdeckels 19 anliegende Ende des Verschlußelements 32 eine Dichtung 34 auf.3 shows a modified embodiment of an inverting filter centrifuge. In Fig. 3 corresponding parts are designated by the same reference numerals as in Fig. 1. In contrast to FIG. 1, the shaft 5 in the embodiment according to FIG. 3 is also designed as a hollow shaft. In the inner bore 31 of this hollow shaft 5, a piston rod-shaped closure element 32 is displaceable into the interior of the drum 7 in such a way that it seals the filling opening 22 from the inside of the drum. A line 33 is formed in the closure element 32, with the aid of which a negative or positive pressure can be generated inside the drum 7. The closure element 32 can be actuated hydraulically or pneumatically in a manner known per se. In order to produce a pressure-tight closure, the end of the closure element 32 resting on the inside of the centrifugal chamber cover 19 has a seal 34.

Wie dargestellt, ist das Verschlußelement 32 an seinem freien Vorderende als Hülse 35 ausgebildet, in deren Innenraum das in die Trommel 7 hinein vorstehende Ende des Füllrohrs 21 eindringen kann.As shown, the closure element 32 is formed at its free front end as a sleeve 35, in the interior of which the end of the filling tube 21 protruding into the drum 7 can penetrate.

Die Ausführungsform einer Stülpfilterzentrifuge nach Fig. 3 arbeitet in der gleichen Weise wie zuvor anhand der Ausführungsform gemäß Fig. 1 beschrieben. Im Gegensatz zu Fig. 1 braucht bei der Ausführungsform nach Fig. 3 jedoch das Füllrohr 21 nicht hin- und herverschoben zu werden, sondern kann insoweit starr mit dem Maschinengestell 2 verbunden sein. Beim Befüllen der Trommel mit Suspension ist das Verschlußelement 32 (in Fig. 3 nach rechts) zurückgezogen, so daß die Öffnung des Einfüllrohres 21 freiliegt. Während der Druckbeaufschlagung des Trommelinneren über die Leitung 33 nimmt das Verschlußelement 32 die in Fig. 3 dargestellte Stellung ein.The embodiment of an inverting filter centrifuge according to FIG. 3 works in the same way as previously described with reference to the embodiment according to FIG. 1. In contrast to FIG. 1, the filling tube 21 does not need to be pushed back and forth in the embodiment according to FIG. 3, but can be rigidly connected to the machine frame 2 in this respect. When the drum is filled with suspension, the closure element 32 is withdrawn (to the right in FIG. 3) so that the opening of the filler tube 21 is exposed. During the pressurization of the interior of the drum via the line 33, the closure element 32 assumes the position shown in FIG. 3.

Claims (7)

  1. An inverted filter centrifuge with a drum mounted so as to be cantilevered in a housing and having radial filter discharge openings, with a cover closing the free front side thereof, the drum and cover being axially displaceable relative to one another, with a feed opening provided on the cover for suspension which is to be filtered and with a feed tube penetrating the feed opening, the feed opening of the cover being closable by a closure element rotating together with the drum, characterised in that the feed tube (21) is designed so that it can be withdrawn from the feed opening (22) of the cover (19) and with the feed tube (21) withdrawn, the feed opening may be closed pressure-tight and avoiding friction locking by the closure element (25) arranged on the cover.
  2. An inverted filter centrifuge with a drum mounted so as to be cantilevered in a housing and having radial filter discharge openings, with a cover closing the free front side thereof, the drum and cover being axially displaceable relative to one another, with a feed opening provided on the cover for suspension which is to be filtered and with a feed tube penetrating the feed opening, the feed opening of the cover being closable by a closure element rotating together with the drum, characterised in that a movable closure element (32) is provided which may be placed pressure-tight and avoiding friction locking during the centrifuging operation from the inside of the drum over the feed opening (22) of the cover (19) and over the end of the feed tube (21).
  3. An inverted filter centrifuge according to claim 1, characterised in that the drum may be connected to a pressure or negative pressure source from its side which faces away from the feed tube (21) by way of a line (29, 33).
  4. An inverted filter centrifuge according to claim 1, characterised in that a valve (25) is arranged in the feed opening (22) which, in one of its positions, forms a free passage for the filter tube (21) and, in its other position with the feed tube (21) pushed back, tightly closes the feed opening (22).
  5. An inverted filter centrifuge according to claim 4, characterised in that the valve (25) is a fluid-operated squeeze valve.
  6. An inverted filter centrifuge according to claim 2, characterised in that the drum (7) is arranged on a hollow shaft (3), and the closure element (32) is displaceably mounted in the hollow shaft (3) such that it closes the feed opening (22) tightly from the inside of the drum (7).
  7. An inverted filter centrifuge according to claim 6, characterised in that the closure element (32) is designed as a sleeve (35) into which the end of the feed tube (21) penetrates.
EP90906988A 1989-05-19 1990-05-11 Inverted filter centrifuge Expired - Lifetime EP0472554B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90906988T ATE95446T1 (en) 1989-05-19 1990-05-11 SUPPORT FILTER CENTRIFUGE.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3916266A DE3916266C1 (en) 1989-05-19 1989-05-19
DE3916266 1989-05-19
PCT/EP1990/000764 WO1990014166A1 (en) 1989-05-19 1990-05-11 Inverted filter centrifuge

Publications (3)

Publication Number Publication Date
EP0472554A1 EP0472554A1 (en) 1992-03-04
EP0472554B1 EP0472554B1 (en) 1993-10-06
EP0472554B2 true EP0472554B2 (en) 1997-12-17

Family

ID=6380933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90906988A Expired - Lifetime EP0472554B2 (en) 1989-05-19 1990-05-11 Inverted filter centrifuge

Country Status (8)

Country Link
US (1) US5169525A (en)
EP (1) EP0472554B2 (en)
JP (1) JP3174319B2 (en)
KR (1) KR0139282B1 (en)
DE (2) DE3916266C1 (en)
ES (1) ES2044583T5 (en)
RU (1) RU2038164C1 (en)
WO (1) WO1990014166A1 (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5277804A (en) * 1990-03-24 1994-01-11 Heinkel Industriezentrifugen Gmbh & Co. Sleeve filter centrifuge
ES2073038T3 (en) * 1990-09-24 1995-08-01 Heinkel Ind Zentrifugen REVERSIBLE FILTER CENTRIFUGE.
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
DE10115381A1 (en) * 2001-03-28 2002-10-24 Heinkel Ag inverting filter centrifuge
US6649059B2 (en) * 2001-07-05 2003-11-18 Lancer Partnership, Ltd. Apparatus for treating fluids
DE10311997A1 (en) * 2003-03-19 2004-10-07 Johannes Gerteis inverting filter centrifuge
US20070278146A1 (en) * 2006-05-31 2007-12-06 Cook Melvin W Centrifugal Fluid Filtration Devices, Systems and Methods
US20080061008A1 (en) * 2006-09-12 2008-03-13 Kelsey Robert L Systems and methods for treating metalworking fluids
US7651614B2 (en) * 2007-02-13 2010-01-26 Vrtx Technologies, Llc Methods for treatment of wastewater
US20080257411A1 (en) * 2007-04-18 2008-10-23 Kelsey Robert L Systems and methods for preparation of emulsions
US7651621B2 (en) * 2007-04-18 2010-01-26 Vrtx Technologies, Llc Methods for degassing one or more fluids
US20080257828A1 (en) * 2007-04-18 2008-10-23 Kelsey Robert L Systems and methods for reduction of metal contaminants in fluids
US20090152212A1 (en) * 2007-04-18 2009-06-18 Kelsey Robert L Systems and methods for treatment of groundwater
DE102008024590B4 (en) * 2008-05-21 2017-06-01 Heraeus Deutschland GmbH & Co. KG Recycling process for shaped catalyst bodies
JP5434193B2 (en) * 2009-03-30 2014-03-05 三菱化学株式会社 Method for producing toner for developing electrostatic image and centrifuge
DE102011010072B4 (en) 2011-02-01 2013-08-22 Contecma C. S. Gmbh inverting filter centrifuge
MX2020006580A (en) * 2017-12-19 2020-12-10 Xeros Ltd Filter for a treatment apparatus.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2710624C2 (en) * 1977-03-11 1985-09-19 Heinkel Industriezentrifugen GmbH + Co, 7120 Bietigheim-Bissingen Inverting filter centrifuge
DE3430507A1 (en) * 1984-08-18 1986-02-27 Heinkel Industriezentrifugen GmbH + Co, 7120 Bietigheim-Bissingen Filter centrifuge
DE3740411C2 (en) * 1987-11-28 1996-11-14 Heinkel Ind Zentrifugen Inverting filter centrifuge
US5004540A (en) * 1989-12-01 1991-04-02 Ketema Process Equipment Division Invertible filter-type centrifuge with improved bearing and seal assembly

Also Published As

Publication number Publication date
JP3174319B2 (en) 2001-06-11
WO1990014166A1 (en) 1990-11-29
DE59003028D1 (en) 1993-11-11
US5169525A (en) 1992-12-08
ES2044583T5 (en) 1998-03-01
DE3916266C1 (en) 1990-08-30
JPH04505275A (en) 1992-09-17
RU2038164C1 (en) 1995-06-27
KR0139282B1 (en) 1998-04-27
EP0472554A1 (en) 1992-03-04
KR920700775A (en) 1992-08-10
ES2044583T3 (en) 1994-01-01
EP0472554B1 (en) 1993-10-06

Similar Documents

Publication Publication Date Title
EP0472554B2 (en) Inverted filter centrifuge
EP1603679B1 (en) Inverting filter centrifuge
DE3740411C2 (en) Inverting filter centrifuge
DE19646038C2 (en) Inverting filter centrifuge
DE2260461B2 (en) Filter centrifuge
EP0551252B1 (en) Reverse filter centrifugal machine
EP0535427A2 (en) Discontinuously operating filter centrifuge
EP0584289B1 (en) Inverted filter centrifuge
DE4337618C1 (en) Inverted filter centrifuge (seal for drum space)
EP0672459B1 (en) Filter centrifuge
DE4342471C1 (en) Filter centrifuge
DE3520134C2 (en) Inverting filter centrifuge
DE4417310C1 (en) Cuff centrifuge filter assembly for liquid-solid suspensions
EP0861125B1 (en) Centrifuge with slide-in filter
DE3430507A1 (en) Filter centrifuge
DE10245013A1 (en) Filter centrifuge, used in solid/liquid separation processes, comprises housing, outer drum connected to housing, filter unit fixed in drum, and drive shaft fixed to outer drum and filter unit
EP0448736B1 (en) Reversible filter centrifuge
DE4430354A1 (en) Centrifuge for solid-liquid separation
DE3430506C3 (en) Filter centrifuge
DE102015003058B3 (en) inverting filter centrifuge
DE10216735A1 (en) Pusher bag centrifuge has a filter bag having a front end extending into an annular gap between the drum end and drum lid

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

17P Request for examination filed

Effective date: 19911030

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

17Q First examination report despatched

Effective date: 19930311

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILA

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19931006

Ref country code: DK

Effective date: 19931006

REF Corresponds to:

Ref document number: 95446

Country of ref document: AT

Date of ref document: 19931015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59003028

Country of ref document: DE

Date of ref document: 19931111

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19931020

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2044583

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19940511

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940531

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: KRAUSS-MAFFEI VERFAHRENSTECHNIK GMBH

Effective date: 19940706

NLR1 Nl: opposition has been filed with the epo

Opponent name: KRAUS-MAFFEI VERFAHRENSTECHNIK GMBH

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950201

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

27A Patent maintained in amended form

Effective date: 19971217

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

GBTA Gb: translation of amended ep patent filed (gb section 77(6)(b)/1977)
REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

Free format text: AUFRECHTERHALTUNG DES PATENTES IN GEAENDERTER FORM

REG Reference to a national code

Ref country code: ES

Ref legal event code: DC2A

Kind code of ref document: T5

Effective date: 19980123

NLR2 Nl: decision of opposition
NLR3 Nl: receipt of modified translations in the netherlands language after an opposition procedure
ET3 Fr: translation filed ** decision concerning opposition
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20040521

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20040524

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040527

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040607

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050512

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050525

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050526

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050531

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050531

BERE Be: lapsed

Owner name: *HEINKEL INDUSTRIEZENTRIFUGEN G.M.B.H. & CO.

Effective date: 20050531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051201

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20051201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060511

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060531

Year of fee payment: 17

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050512

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060511

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070131

BERE Be: lapsed

Owner name: *HEINKEL INDUSTRIEZENTRIFUGEN G.M.B.H. & CO.

Effective date: 20050531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070511