EP0472554A1 - Inverted filter centrifuge. - Google Patents

Inverted filter centrifuge.

Info

Publication number
EP0472554A1
EP0472554A1 EP90906988A EP90906988A EP0472554A1 EP 0472554 A1 EP0472554 A1 EP 0472554A1 EP 90906988 A EP90906988 A EP 90906988A EP 90906988 A EP90906988 A EP 90906988A EP 0472554 A1 EP0472554 A1 EP 0472554A1
Authority
EP
European Patent Office
Prior art keywords
drum
cover
filter centrifuge
filling
filling tube
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.)
Granted
Application number
EP90906988A
Other languages
German (de)
French (fr)
Other versions
EP0472554B1 (en
EP0472554B2 (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
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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
Publication of EP0472554B1 publication Critical patent/EP0472554B1/en
Application granted granted Critical
Publication of EP0472554B2 publication Critical patent/EP0472554B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 has a radial filtrate passages and is rotatably supported in a self-supporting manner in a housing, 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 filling tube penetrating the filling opening.
  • inverting filter centrifuges it is sometimes advantageous to pressurize the drum with a gas under pressure (for example superheated steam) in order to increase the hydraulic pressure which arises in the centrifugal force field of the drum or to blow through the filter cake for the purpose of drying it or also around it to undergo a steam wash. Furthermore, it may alternatively also be desirable to pressurize the drum.
  • a gas under pressure for example superheated steam
  • the filling opening of the cover can be tightly closed by a closure element which rotates together with the drum and which is uncoupled from the filling tube while avoiding frictional engagement.
  • Figure 1 is a schematic partial sectional view of an inverting filter centrifuge.
  • Fig. 2 is a view in the direction of arrow A in Fig. 1 and
  • Fig. 3 is a schematic partial sectional view similar to Fig. 1 of another embodiment of an inverting filter centrifuge.
  • 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 put into rapid circulation.
  • a shaft 5 is arranged in the interior of the hollow shaft 3 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 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.
  • 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 5, which freely penetrates the base 8.
  • a centrifugal chamber cover 19 is rigidly fastened to the base piece 17 by means of stud bolts 18, leaving a space free, which tightly closes the centrifugal space of the drum 7 by resting on its opening edge and together with the base part 17 by axially pushing the shaft 5 out of the hollow shaft 3 can be lifted from the drum 7.
  • 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 pulled back into the position shown in FIG. 1.
  • the filling opening 22 can be closed by a pinch valve 25, which is known per se and is formed by a hose 23. 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 pinch valve 25 is designed such 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 closure element, which rotates together with the drum 7, closes the drum tightly at the filling opening 22 and opens in the opened state Penetration of the fill tube 21 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 in the hollow shaft 3 is withdrawn, 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 the drum.
  • the centrifuge chamber cover 19 has placed itself tightly on the opening edge of the drum 7.
  • the suspension to be filtered is introduced through the filler tube 21 which is pushed through the opened 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 in the interior of 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 filling opening 22 tightly by means of the pinch valve 25 or another closure element.
  • the inverting filter centrifuge After the dropping 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 the shaft 5 back, 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 and the pressure conditions in the drum 7 can be set as desired.
  • FIG. 3 shows a modified embodiment of an inverted filter centrifuge.
  • Fig. 3 corresponding parts are designated by the same reference numerals as in Fig. 1.
  • the shaft 5 is also designed as a hollow shaft.
  • a piston rod-shaped closure element 32 can be pushed into the interior of the drum 7 in such a way that it closes the filling opening 22 tightly 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.
  • the end of the closure element 32 which bears against the inside of the centrifuge chamber cover 19 has a seal 34.
  • the closure element 32 is formed at its free front end as a sleeve 35, into 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, but can be rigidly connected to the machine frame 2.
  • the closure element 32 is withdrawn (to the right in FIG. 3) so that the opening of the filling tube 21 is exposed.
  • the closure element 32 assumes the position shown in FIG. 3.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

Une centrifugeuse à filtre retourné comprend un tambour (7) non soutenu, monté de manière rotative dans un logement (1), pourvu de passages radiaux de filtrat et dont une des faces frontales libres est fermée par un couvercle (19). Le tambour (7) et le couvercle (19) sont axialement mobiles l'un par rapport à l'autre. Un orifice de remplissage (22) est ménagé dans le couvercle pour la suspension à filtrer et un tuyau de remplissage (21) traverse l'orifice de remplissage. L'orifice de remplissage (22) du couvercle (19) peut être hermétiquement fermé par un élément de fermeture (25) qui tourne avec le tambour et qui est découplé du tuyau de remplissage (21) afin d'éviter son entraînement par friction.An inverted filter centrifuge comprises an unsupported drum (7) rotatably mounted in a housing (1), provided with radial filtrate passages and one of the free end faces of which is closed by a cover (19). The drum (7) and the cover (19) are axially movable relative to each other. A filling hole (22) is provided in the cover for the suspension to be filtered and a filling pipe (21) passes through the filling hole. The filling port (22) of the cover (19) can be hermetically closed by a closure member (25) which rotates with the drum and which is decoupled from the filling pipe (21) in order to avoid its friction drive.

Description

StülpfilterZentrifuge Inverting filter centrifuge
Die Erfindung betrifft eine Stülpfilterzentrifuge mit einer in einem Gehäuse freitragend drehbar gelagerten, radiale Filtrat- durchlässe aufweisenden Trommel, mit einem deren freie Stirn¬ seite verschließenden Deckel, wobei Trommel und Deckel relativ zueinander axial verschieblich sind, mit einer am Deckel vorge¬ sehenen Einfüllöffnung für zu filtrierende Suspension und mit einem die Einfüllöffnung durchdringenden Füllrohr.The invention relates to an inverting filter centrifuge with a drum which has a radial filtrate passages and is rotatably supported in a self-supporting manner in a housing, 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 filling tube penetrating the filling opening.
Eine Stülpfilterzentrifuge dieser Art, die zum Trennen von in Suspension befindlichen Feststoff- und Flüssigkeitsbestand¬ teilen eingesetzt wird, ist in der DE-PS 27 10 624 beschrieben.An inverting filter centrifuge of this type, which is used for separating solid and liquid constituents in suspension, is described in DE-PS 27 10 624.
Bei solchen Stülpfilterzentrifugen ist es manchmal vorteilhaft, die Trommel mit einem unter Überdruck stehenden Gas (beispiels¬ weise Heißdampf) zu beaufschlagen, um den im Fliehkraftfeld der Trommel entstehenden, hydraulischen Druck zu erhöhen oder um den Filterkuchen zum Zwecke seiner Trocknung durchzublasen oder auch um ihn einer Dampfwasche 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 pressurize the drum with a gas under pressure (for example superheated steam) in order to increase the hydraulic pressure which arises in the centrifugal force field of the drum or to blow through the filter cake for the purpose of drying it or also around it to undergo a steam wash. Furthermore, it may alternatively 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. Es ist Aufgabe der Erfindung, eine gattungsgemäße Stülpfilter¬ zentrifuge so zu verbessern, daß der von der Trommel umschlos¬ sene Schleuderraum mit Über- oder Unterdruck beaufschlagt wer¬ den kann.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. 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 subjected to overpressure or underpressure.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Ein¬ füllöffnung des Deckels durch ein zusammen mit der Trommel um¬ laufendes Verschlußelement dicht verschließbar ist, das unter Vermeidung eines Reibschlusses vom Füllrohr entkuppelt ist.The object is achieved according to the invention in that the filling opening of the cover can be tightly closed by a closure element which rotates together with the drum and which is uncoupled from the filling tube while avoiding frictional engagement.
Die nachstehende Beschreibung bevorzugter Ausführungsformen der Erfindung dient im Zusammenhang mit beiliegender Zeichnung der weiteren Erläuterung. Es zeigen:The following description of preferred embodiments of the invention serves in conjunction with the accompanying drawings for further explanation. Show it:
Fig. 1 eine schematische Teilschnittansicht einer Stülpfilterzentrifuge;Figure 1 is a schematic partial sectional view of an inverting filter centrifuge.
Fig. 2 eine Ansicht in Richtung des Pfeiles A in Fig. 1 undFig. 2 is a view in the direction of arrow A in Fig. 1 and
Fig. 3 eine schematische Teilschnittansicht ähnlich Fig. 1 einer anderen Ausführungsform einer Stülpfilterzentrifuge.Fig. 3 is a schematic partial sectional view similar to Fig. 1 of another embodiment of an inverting filter centrifuge.
Die in Fig. 1 dargestellte Stülpfilterzentrifuge umfaßt ein lediglich schematisch angedeutetes, die gesamte Maschine dicht umschließendes Gehäuse 1, in dem auf einem stationären Maschi¬ nengestell 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 raschen Umlauf versetzbar ist. Im Innern der Hohlwelle 3 ist drehfest, jedoch verschiebbar eine Welle 5 angeordnet. Die Welle 5 läuft gemeinsam mit der Hohlwelle 3 um, ist jedoch in dieser axial verschieblich.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 put into rapid circulation. A shaft 5 is arranged in the interior of the hollow shaft 3 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 hinausragen¬ den 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 Offnungsrand 12 ist mittels eines Halterings 13 der eine Rand 14 eines im wesentlichen schlauchförmig ausgebildeten Filtertuchs 15 dicht eingespannt. Der andere Rand 16 des Filtertuches 15 ist in ent¬ sprechender Weise dicht mit einem Bodenstück 17 verbunden, wel¬ ches starr mit der verschiebbaren, den Boden 8 frei durchdrin¬ genden, verschiebbaren Welle 5 verbunden ist.At the end of the hollow shaft 3 on the left in FIG. 1, which projects 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, 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 5, which freely penetrates the base 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 Öff¬ nungsrand dicht verschließt 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.A centrifugal chamber cover 19 is rigidly fastened to the base piece 17 by means of stud bolts 18, leaving a space free, which tightly closes the centrifugal space of the drum 7 by resting on its opening edge and together with the base part 17 by axially pushing the shaft 5 out of the hollow shaft 3 can be lifted from the drum 7. 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 Stülpfilter¬ zentrifuge ist ein Füllrohr 21 angeordnet, welches zum Zuführen einer in ihre Feststoff- und Flüssigkeitsbestandteile zu zer¬ legenden Suspension in den Schleuderraum der Trommel 7 dient. Das freie Ende des Füllrohrs 21 wird hierzu durch eine zentrale Einfüllöffnung 22 des Deckels 19 in das Trommelinnere einge¬ führt und nach der Befüllung der Trommel wieder in die in Fig. 1 dargestellte Position zurückgezogen.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. 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 pulled back into the position shown in FIG. 1.
Die Einfüllöffnung 22 ist durch ein von einem Schlauch 23 ge¬ bildetes, 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 ge¬ füllt werden, wodurch das Quetschventil 25 druckdicht geschlos¬ sen ist. Dieser Zustand ist in Fig. 2 dargestellt.The filling opening 22 can be closed by a pinch valve 25, which is known per se and is formed by a hose 23. 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 Posi¬ tion gemäß Fig. 1 befindliche Füllrohr 21 durch das nunmehr ge¬ öffnete Quetschventil 25 hindurch platzsparend in eine Bohrung 27 der Welle 5 eindringen. Das Quetschventil 25 ist so ausge¬ bildet, 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 from the edge of the drum by moving the shaft 5, the filling tube 21 in the position shown in FIG penetration. The pinch valve 25 is designed such 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 ersetzt werden, beispielsweise ein Kugelventil oder ein Schieberventil, solange gewährleistet ist, daß ein solches, gemeinsam mit der Trommel 7 umlaufendes Verschlußelement die Trommel an der Einfüllöffnung 22 dicht verschließt und im Öff¬ nungszustand 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 closure element, which rotates together with the drum 7, closes the drum tightly at the filling opening 22 and opens in the opened state Penetration of the fill tube 21 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 ver¬ bundene Bodenstück 17 in der Nähe des Bodens 8 der Schleuder¬ trommel 7 liegt und das Filtertuch 15 derart in die Trommel eingestülpt ist, daß es in deren Innerem liegt. Der Schleuder¬ raumdeckel 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 Quetschven¬ til hindurchgeschobene Einfüllrohr 21 zu filtrierende Suspen¬ sion 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 Feststoff- teilchen 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 in the hollow shaft 3 is withdrawn, 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 the drum. The centrifuge 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 filler tube 21 which is pushed through the opened 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 ausge¬ bildete Leitung 29 ein Überdruck im Innern der Trommel 7 er¬ zeugt werden. Bedarfsweise ist auch die Ausbildung von Unter¬ druck im Trommelinnern über diese Leitung 29 möglich. In ande¬ ren Fällen kann die Veränderung des Innendrucks in der Trommel 7 auch unterbleiben. Dennoch kann es wichtig sein, die Einfüll¬ öffnung 22 durch das Quetschventil 25 oder ein anderes Ver¬ schlußelement dicht zu verschließen.During this process, an overpressure can be generated in the interior of 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 filling opening 22 tightly by means of the pinch valve 25 or another closure element.
Nach Beendigung des Filtriervorganges wird bei weiterhin rotie¬ render Schleudertrommel 7 und nunmehr geöffnetem Quetschventil 25 (sowie gegebenenfalls abgeschalteter Druck- oder Unterdruck¬ quelle) 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 are thrown out into the housing 1. 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 Zu¬ rückschieben der Welle 5 wieder in ihre Betriebsstellung ent¬ sprechend Fig. 1 gebracht, wobei sich das Filtertuch 15 in ent¬ gegengesetzter Richtung zurückstülpt. Auf diese Weise ist ein Betrieb der Zentrifuge mit ständig rotierender Schleudertrommel 7 möglich und die Druckverhältnisse in der Trommel 7 können be¬ liebig eingestellt werden.After the dropping 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 the shaft 5 back, 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 and the pressure conditions in the drum 7 can be set as desired.
Die Fig. 3 zeigt eine abgewandelte Ausführungsform einer Stülp¬ filterzentrifuge. In Fig. 3 sind einander entsprechende Teile mit den gleichen Bezugszeichen wie in Fig. 1 bezeichnet. Im Un¬ terschied zu Fig. 1 ist bei der Ausführungsform nach Fig. 3 die Welle 5 ebenfalls als Hohlwelle ausgebildet. In der Innenboh¬ rung 31 dieser Hohlwelle 5 ist ein kolbenstangenförmiges Ver¬ schlußelement 32 in das Innere der Trommel 7 hinein derart ver¬ schieblich, daß es die Einfüllöffnung 22 von der Innenseite der Trommel her dicht verschließt. Im Verschlußelement 32 ist eine Leitung 33 ausgebildet, mit deren Hilfe im Innern der Trommel 7 ein Unter- oder Überdruck erzeugt werden kann. Das Verschlu߬ element 32 kann hydraulisch oder pneumatisch in an sich bekann¬ ter Weise betätigt werden. Zur Herstellung eines druckdichten Verschlusses weist das an der Innenseite des Schleuderraum¬ deckels 19 anliegende Ende des Verschlußelements 32 eine Dich¬ tung 34 auf. 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 eindrin¬ gen kann.3 shows a modified embodiment of an inverted filter centrifuge. In Fig. 3 corresponding parts are designated by the same reference numerals as in Fig. 1. In contrast to FIG. 1, in the embodiment according to FIG. 3 the shaft 5 is also designed as a hollow shaft. In the inner bore 31 of this hollow shaft 5, a piston rod-shaped closure element 32 can be pushed into the interior of the drum 7 in such a way that it closes the filling opening 22 tightly 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. To produce a pressure-tight closure, the end of the closure element 32 which bears against the inside of the centrifuge chamber cover 19 has a seal 34. As shown, the closure element 32 is formed at its free front end as a sleeve 35, into 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 ar¬ beitet in der gleichen Weise wie zuvor anhand der Ausführungs¬ form 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 Einfüll¬ rohres 21 freiliegt. Während der Druckbeaufschlagung des Trom¬ melinneren 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, in the embodiment according to FIG. 3, however, the filling tube 21 does not need to be pushed back and forth, but can be rigidly connected to the machine frame 2. 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 filling 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

P a t e n t a n s p r ü c h eP a t e n t a n s r u c h e
Stülpfilterzentrifuge mit einer in einem Gehäuse freitra¬ gend drehbar gelagerten, radiale Filtratdurchlässe aufwei¬ senden Trommel, mit einem deren freie Stirnseite ver- schliessenden Deckel, wobei Trommel und Deckel relativ zu¬ einander axial verschieblich sind, mit einer am Deckel vorgesehenen Einfüllöffnung für zu filtrierende Suspension und mit einem die Einfüllöffnung durchdringenden Füllrohr, d a d u r c h g e k e n n z e i c h n e t , daß die Einfüllöffnung (22) des Deckels (19) durch ein zu¬ sammen mit der Trommel (7) umlaufendes Verschlußelement (25, 32) dicht verschließbar ist, das unter Vermeidung eines Reibschlusses vom Füllrohr (21) entkoppelt ist.Inverting filter centrifuge with a drum which has a radial filtrate passages which are freely rotatably supported in a housing, 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 filters to be filtered Suspension and with a filling tube penetrating the filler opening, characterized in that the filler opening (22) of the cover (19) can be tightly closed by a closure element (25, 32) which rotates together with the drum (7) and which avoids frictional engagement of the Filling tube (21) is decoupled.
Stülpfilterzentrifuge nach Anspruch 1, dadurch gekenn¬ zeichnet, daß die Trommel von ihrer dem Füllrohr (21) ab¬ gekehrten Seite her über eine Leitung (29, 33) mit einer Druck- oder Unterdruckquelle verbindbar ist.Inverting filter centrifuge according to Claim 1, characterized in that the drum can be connected to a pressure or vacuum source from its side facing away from the filling tube (21) via a line (29, 33).
Stülpfilterzentrifuge nach Anspruch 1, dadurch gekenn¬ zeichnet, daß in der Einfüllöffnung (22) ein Ventil (25) angeordnet ist, das in seiner einen Stellung einen freien Durchlaß für das Füllrohr (21) bildet und in seiner ande¬ ren Stellung bei zurückgeschobenem Füllrohr (21) die Ein¬ füllöffnung (22) dicht verschließt. 4. Stülpfilterzentrifuge nach Anspruch 3, dadurch gekenn¬ zeichnet, daß das Ventil (25) ein fluidbetätigtes Quetsch¬ ventil ist.Inverting filter centrifuge according to Claim 1, characterized in that a valve (25) is arranged in the filling opening (22), which in its one position forms a free passage for the filling tube (21) and in its other position when the filling tube is pushed back (21) tightly closes the filling opening (22). 4. Inverting filter centrifuge according to claim 3, characterized gekenn¬ characterized in that the valve (25) is a fluid-operated pinch valve.
5. Stülpfilterzentrifuge nach Anspruch 1, dadurch gekenn¬ zeichnet, daß die Trommel (7) auf einer Hohlwelle (3) an¬ geordnet ist und das Verschlußelement (32) in der Hohl¬ welle (3) derart verschieblich gelagert ist, daß es die Einfüllöffnung (22) von der Innenseite der Trommel (7) her dicht verschließt.5. Inverting filter centrifuge according to claim 1, characterized gekenn¬ characterized in that the drum (7) on a hollow shaft (3) is arranged an¬ and the closure element (32) in the hollow shaft (3) is slidably mounted so that it Filling opening (22) from the inside of the drum (7) closes tightly.
6. Stülpfilterzentrifuge nach Anspruch 5, dadurch gekenn¬ zeichnet, daß das Verschlußelement (32) als Hülse (35) ausgebildet ist, in die das Ende des Füllrohrs (21) ein¬ dringt. 6. Inverting filter centrifuge according to claim 5, characterized gekenn¬ characterized in that the closure element (32) is designed as a sleeve (35) into which the end of the filling 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 true EP0472554A1 (en) 1992-03-04
EP0472554B1 EP0472554B1 (en) 1993-10-06
EP0472554B2 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)

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Also Published As

Publication number Publication date
KR0139282B1 (en) 1998-04-27
DE3916266C1 (en) 1990-08-30
ES2044583T5 (en) 1998-03-01
US5169525A (en) 1992-12-08
JPH04505275A (en) 1992-09-17
DE59003028D1 (en) 1993-11-11
WO1990014166A1 (en) 1990-11-29
KR920700775A (en) 1992-08-10
EP0472554B1 (en) 1993-10-06
RU2038164C1 (en) 1995-06-27
EP0472554B2 (en) 1997-12-17
ES2044583T3 (en) 1994-01-01
JP3174319B2 (en) 2001-06-11

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