EP2950932A1 - Solid-wall screw centrifuge having a weir edge - Google Patents

Solid-wall screw centrifuge having a weir edge

Info

Publication number
EP2950932A1
EP2950932A1 EP13801466.7A EP13801466A EP2950932A1 EP 2950932 A1 EP2950932 A1 EP 2950932A1 EP 13801466 A EP13801466 A EP 13801466A EP 2950932 A1 EP2950932 A1 EP 2950932A1
Authority
EP
European Patent Office
Prior art keywords
weir edge
solid bowl
longitudinal axis
weir
rotation
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
EP13801466.7A
Other languages
German (de)
French (fr)
Other versions
EP2950932B1 (en
Inventor
Benno Vielhuber
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.)
Flottweg SE
Original Assignee
Flottweg SE
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
Application filed by Flottweg SE filed Critical Flottweg SE
Publication of EP2950932A1 publication Critical patent/EP2950932A1/en
Application granted granted Critical
Publication of EP2950932B1 publication Critical patent/EP2950932B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/06—Fluid drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/06—Arrangement of distributors or collectors in centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B2001/2075—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl with means for recovering the energy of the outflowing liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B2001/2083—Configuration of liquid outlets

Definitions

  • the invention relates to a solid bowl screw centrifuge with a rotatable in operation about a longitudinal axis in a rotational direction centrifuge drum at the end face at least one outflow opening for discharge of clarified Good from the centrifuge drum, a discharge opening radially outwardly limiting weir edge and located on the weir edge Energy recovery device for recovering energy of the effluent, clarified goods are formed. Furthermore, the invention also relates to a structural unit which is formed by such a weir edge and such an energy recovery device and is provided for attachment to an end face of a centrifuge drum.
  • the invention has for its object to provide a Vollmantelschneckenzentrifuge whose energy recovery device is particularly effective.
  • a Vollmantelschneckenzentrifuge with a rotatable in operation about a longitudinal axis in a rotational direction centrifuge drum at the end face at least one outflow opening for the discharge of clarified Good from the centrifuge drum, a discharge opening radially outwardly limiting weir edge and a the weir edge located energy recovery device for recovering e- energy of the effluent, clarified goods are formed.
  • the weir edge is at least partially pivoted to the direction of rotation when viewed from the longitudinal axis.
  • the respective weir edge does not extend transversely to the longitudinal axis of the centrifuge, but obliquely to it.
  • the weir edge is not pivoted in such a way that it is already tangential to the outflowing material against the rotating material. redirected direction.
  • a deflection similar to a jet engine would be energetically particularly useful.
  • the weir edge according to the invention is pivoted toward the direction of rotation so that the flow of the material flowing behind the weir edge is initially also moved in the direction of rotation.
  • the material flowing behind the weir edge is even more directed towards a subsequent energy recovery device than is the case in conventional solid bowl centrifuges with a purely axial outflow of clarified material at the weir edge.
  • the solution according to the invention is based on the recognition that the energy-recovering effect of energy recovery devices of the type mentioned is based in particular on the fact that the material flows axially against the associated deflection surface and then leaves the latter in the tangential direction. This impact and deflection produces a particularly strong momentum transfer from the effluent to the centrifuge drum. If, instead, the outflowing good is deflected comparatively gently tangentially against the direction of rotation as a homogeneous stream, a large part of the momentum of the outflowing material is lost as internal liquid friction.
  • the solution according to the invention is accordingly superior to conventional solutions in terms of the amount of energy recovered.
  • Such an effect of the solution according to the invention is particularly pronounced in that the weir edge is at least partially pivoted towards the direction of rotation at an angle of between 2 ° to 45 °, preferably between 5 ° and 30 °, more preferably between 10 ° and 15 °.
  • the inventive weir edge is particularly preferably arranged in a pivoted manner with respect to the direction of rotation. In Strömungshchtung of the flowing over the weir edge good behind the weir edge is preferably formed, directed radially outward overflow surface for the outflowing Good.
  • the outflowing material is advantageously conducted at least slightly radially outward, so that its outflow speed can be increased somewhat. This also increases the impact speed of the goods at the energy recovery device, so that there a particularly efficient pulse transmission can be achieved.
  • the overflow surface of this type preferably extends along the entire weir edge and is particularly advantageously configured directly adjacent to the weir edge.
  • the overflow surface is preferably arranged with respect to the longitudinal axis radially outwardly at an angle between 10 ° and 65 °, preferably between 20 ° and 55 °, more preferably between 30 ° and 45 ° pivoted. With the overflow surface inclined in this way outwards, particularly advantageous outflow rates can be achieved for the outflowing material.
  • the energy recovery device is preferably designed with a deflecting surface which deflects the outflowing material counter to the direction of rotation.
  • the deflection surface is advantageously viewed axially in the direction of the longitudinal axis arranged immediately behind the weir edge.
  • the deflection surface is preferably arranged exclusively radially on the outside of the weir edge.
  • the deflection surface of this type is particularly small in the radial direction and thus has a low air flow resistance. Furthermore, it offers only a small attack surface for outflowing good, which is swirled at a leading outflow opening. Such an abutting material on the trailing deflection surface would contribute to a deceleration of the centrifuge drum.
  • the weir edge and its energy recovery device according to the invention are preferably designed as a unit which can be jointly adjusted on the centrifuge drum. Accordingly, the invention is also directed to a structural unit which is formed by such a weir edge according to the invention and the associated energy recovery device and is provided for attachment to a front side of a centrifuge drum.
  • FIG. 1 shows a partially sectioned side view of a centrifuge drum with
  • FIG. 3 is a partially sectioned side view of a centrifuge drum with weir plate and energy recovery device of a first embodiment of a solid bowl screw centrifuge according to the invention
  • Fig. 4 shows the view IV of FIG. 3
  • FIG. 6 is a partially sectioned side view of a centrifuge drum with weir plate and energy recovery device of a second embodiment of a solid bowl screw centrifuge according to the invention
  • Fig. 7 shows the view VII of FIG. 6 and
  • Fig. 8 shows a part of a view according to Fig. 7 of a third embodiment of a solid bowl screw centrifuge according to the invention. Detailed description of the embodiments
  • a Butler plate 20 is stationary, but adjustably mounted on the end wall 14. The weir plate 20 projects up to the outflow opening 16 so that it covers the outside at its radially outer area. In this case, the weir plate 20 at its radially inwardly directed edge to a weir edge 22.
  • the prior art weir edge 22 extends along the end wall 14 and thus transversely to the longitudinal axis 18 or at an angle of 90 ° to this.
  • the weir edge 22 retains clarified product 24 in the centrifuge drum 12, so that during operation of the solid bowl screw centrifuge 10 this clarified material 24 accumulates there at a pond depth 26 and subsequently flows off substantially continuously over the weir edge 22.
  • an energy recovery device 28 In the flow direction of the cleared material 24 behind or downstream of the weir edge 22 is located outside of the weir plate 20, an energy recovery device 28 according to the prior art.
  • This energy recovery device 28 is designed as a discharge channel 30 which has a flat bottom surface 32 that extends tangentially at the height of the weir edge 22.
  • a deflecting surface 34 As a part of the outflow channel 30, a deflecting surface 34, which according to the prior art extends in an arcuate manner in front of the region of the discharge opening 16 viewed in the longitudinal direction, extends perpendicular to the bottom surface 32.
  • the deflecting surface 34 deflects the clarified good 24, which flows axially through the discharge opening 16 radially inwards, under the weir edge 22 in an inflow direction 38, in a tangential direction to a discharge direction 40.
  • the centrifuge drum 12 rotates in a direction of rotation 36 and the clarified Good 24 is deflected by the deflection surface 34, that it counter to this direction of rotation 36th tangentially exits the energy recovery device 28.
  • the clarified material 24 "pushes off” the centrifuge drum 12, thereby transferring to it a portion of its momentum and contributing to energy recovery at the centrifuge drum 12.
  • This "repulsion" is caused by internal fluid friction in the clarified product 24 and thereby alleviated that the centrifuge drum 12 continues to rotate in the direction of rotation 36 at the same time.
  • the centrifuge drum 12 thus gives way to the repulsion partially.
  • FIG. 3 to 5 an embodiment of a Vollmantelschneckenzentrifu- ge 10 is illustrated with the centrifuge drum 12, on whose weir plate 20, a weir edge 42 is provided according to the invention.
  • This weir edge 42 is pivoted with respect to the longitudinal axis 18 in its entire extension or length as a straight line at an angle 44 of 10 ° to the direction of rotation 36.
  • the weir edge 42 thus does not extend in the transverse direction, but points outside obliquely to the direction of rotation 36.
  • a discharge channel 46 In the flow direction of the clarified material 24 behind the weir edge 42 is a discharge channel 46 according to the invention, which is initially designed with an obliquely radially outwardly inclined, flat overflow surface 48.
  • the overflow surface 48 is inclined at an angle 50 of 45 ° obliquely to the longitudinal axis 18 of the centrifuge drum 12 and extends over the entire width of the weir edge 42.
  • the overflow surface 48 is part of an energy recovery device 52 according to the invention and directs the effluent over the sloping weir edge 42 Good 24 slightly radially outward and opposite to the direction of rotation 36. This good 24 is accelerated in terms of its flow velocity. Its potential energy is thus converted to a certain extent within the energy recovery device 52 kinetic energy.
  • the outflow channel 46 of the energy recovery device 52 also includes a flat bottom surface 54, which, however, lies slightly further outward than the weir edge 42. Furthermore, an arcuate deflection surface 56 is provided.
  • the outflowing Good 24 of the overflow surface 48 slightly opposite to the direction of rotation 36 as explained above is particularly accelerated directed against this deflecting surface 56.
  • the deflection surface 56 can be designed to be particularly small and it is sufficient if it extends radially inward only up to the depth of the weir edge 42. With such a small deflection surface 56, a comparatively small flow resistance results for the energy recovery device 52 at the outside of the centrifuge drum 12 rotating at high speed.
  • FIGS. 6 and 7 show an inventively preferred embodiment of a weir edge 42 with an energy recovery device 52 according to the invention, in which the weir edge 42 is oriented at an angle 44 of 20 ° obliquely to the longitudinal axis 18.
  • FIG. 8 shows a very similar exemplary embodiment, in which the associated weir plate 20 together with the weir edge 42 and the energy recovery device 52 at an angle 58 between 5 ° and 10 °, preferably 8 °, from the tangential direction counter to the direction of rotation 36 considered inclined radially inward.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

A solid-wall screw centrifuge (10) having a centrifuge drum (12) which can in operation be rotated about a longitudinal axis in a direction of rotation, on the end face of which at least one outflow opening (16) for the outflow of clarified material from the centrifuge drum, a weir edge (42) bounding the outflow opening (16) radially on the outside and an energy recovery device (52) for the recovery of energy from the outflowing, clarified material located on the weir edge are provided is created. According to the invention, the weir edge (42) is, viewed from the longitudinal axis, arranged so as to be able to be swivelled relative to the direction of rotation (36) at least in sections, the respective weir edge extends not transversely to the longitudinal axis of the centrifuge but instead obliquely to this, in such a way that the stream of material flowing out behind the weir edge is firstly also moved in the direction of rotation.

Description

Beschreibung  description
Vollmantelschneckenzentrifuge mit einer Wehrkante Solid bowl centrifuge with a weir edge
Hintergrund der Erfindung Background of the invention
Die Erfindung betrifft eine Vollmantelschneckenzentrifuge mit einer sich im Betrieb um eine Längsachse in einer Drehrichtung drehbaren Zentrifugentrommel, an deren Stirnseite mindestens eine Abströmöffnung zum Abströmen von geklärtem Gut aus der Zentrifugentrommel, eine die Abströmöffnung nach radial außen hin begrenzende Wehrkante und eine sich an der Wehrkante befindende Energierückgewinnungseinrichtung zum Rückgewinnen von Energie des abströmenden, geklärten Gutes ausgebildet sind. Ferner betrifft die Erfindung auch eine Baueinheit, die von einer solchen Wehrkante und einer solchen Energierückgewinnungsein- richtung gebildet und zum Anbringen an einer Stirnseite einer Zentrifugentrommel vorgesehen ist. The invention relates to a solid bowl screw centrifuge with a rotatable in operation about a longitudinal axis in a rotational direction centrifuge drum at the end face at least one outflow opening for discharge of clarified Good from the centrifuge drum, a discharge opening radially outwardly limiting weir edge and located on the weir edge Energy recovery device for recovering energy of the effluent, clarified goods are formed. Furthermore, the invention also relates to a structural unit which is formed by such a weir edge and such an energy recovery device and is provided for attachment to an end face of a centrifuge drum.
Bei gattungsgemäßen Vollmantelschneckenzentrifugen ist es allgemein bekannt, an deren Zentrifugentrommel stirnseitig mehrere Abströmöffnungen vorzusehen, durch die hindurch das geklärte Gut über eine jeweils zugehörige Wehrkante abströmen kann. Die Wehrkante bildet dabei den radial inneren Rand einer zugehörigen Wehrplatte, die dabei an der Stirnseite der Zentrifugentrommel radial verstellbar angebracht ist. Damit die kinetische Energie des ausströmenden Gutes wieder zum Antreiben der Drehbewegung der Zentrifugentrommel genutzt werden kann, werden inzwischen an derartigen Wehrkanten Energierückgewinnungseinrichtungen vorgesehen. So ist es unter anderem bekannt, an der Stirnseite einer Zentrifugentrommel Ablenkeinrichtungen vorzusehen, mit denen der Gutstrom des geklärten Guts in tangentialer Richtung umgeleitet wird. Das dann nicht axial, sondern tangential entgegen der Drehrichtung der Zentrifugentrommel austretende Gut überträgt der Zentrifugentrommel einen Impuls in Drehrichtung, der die Zentrifugentrommel entsprechend in Drehrichtung antreibt. Solche Ablenkeinrichtungen sind z.B. aus WO 2012 013624 A2 bekannt. Zugrundeliegende Aufgabe In generic Vollmantelschneckenzentrifugen it is well known to provide on the centrifuge drum frontally more outlet openings, through which the clarified Good can flow out via a respectively associated weir edge. The weir edge forms the radially inner edge of an associated weir plate, which is mounted radially adjustable on the front side of the centrifuge drum. So that the kinetic energy of the outflowing good can be used again to drive the rotational movement of the centrifuge drum, are now Provided at such Wehrkanten energy recovery facilities. It is known, inter alia, to provide deflection devices on the end face of a centrifuge drum with which the product flow of the clarified material is diverted in the tangential direction. The then not axially, but tangentially against the direction of rotation of the centrifuge drum exiting Good the centrifuge drum transmits a pulse in the direction of rotation, which drives the centrifuge drum accordingly in the direction of rotation. Such deflection devices are known, for example, from WO 2012 013624 A2. Underlying task
Der Erfindung liegt die Aufgabe zugrunde, eine Vollmantelschneckenzentrifuge zu schaffen, deren Energierückgewinnungseinrichtung besonders wirksam ist. Erfindungsgemäße Lösung The invention has for its object to provide a Vollmantelschneckenzentrifuge whose energy recovery device is particularly effective. Inventive solution
Diese Aufgabe ist erfindungsgemäß mit einer Vollmantelschneckenzentrifuge mit einer sich im Betrieb um eine Längsachse in einer Drehrichtung drehbaren Zentrifugentrommel gelöst, an deren Stirnseite mindestens eine Abströmöffnung zum Abströmen von geklärtem Gut aus der Zentrifugentrommel, eine die Abströmöffnung nach radial außen hin begrenzende Wehrkante und eine sich an der Wehrkante befindende Energierückgewinnungseinrichtung zum Rückgewinnen von E- nergie des abströmenden, geklärten Gutes ausgebildet sind. Erfindungsgemäß ist dabei von der Längsachse aus betrachtet die Wehrkante zumindest abschnitts- weise zur Drehrichtung hin geschwenkt angeordnet. This object is achieved with a Vollmantelschneckenzentrifuge with a rotatable in operation about a longitudinal axis in a rotational direction centrifuge drum at the end face at least one outflow opening for the discharge of clarified Good from the centrifuge drum, a discharge opening radially outwardly limiting weir edge and a the weir edge located energy recovery device for recovering e- energy of the effluent, clarified goods are formed. According to the invention, the weir edge is at least partially pivoted to the direction of rotation when viewed from the longitudinal axis.
Bei der erfindungsgemäßen Vollmantelschneckenzentrifuge erstreckt sich die jeweilige Wehrkante nicht quer zur Längsachse der Zentrifuge, sondern schräg zu dieser. Dabei ist die Wehrkante in grundsätzlich überraschender weise nicht so geschwenkt, dass sie das abströmende Gut bereits tangential entgegen der Dreh- richtung umlenkt. Man könnte meinen, dass eine solche Umlenkung (ähnlich wie bei einem Düsenantrieb) energetisch besonders sinnvoll wäre. In the solid bowl screw centrifuge according to the invention, the respective weir edge does not extend transversely to the longitudinal axis of the centrifuge, but obliquely to it. In principle, the weir edge is not pivoted in such a way that it is already tangential to the outflowing material against the rotating material. redirected direction. One would think that such a deflection (similar to a jet engine) would be energetically particularly useful.
Stattdessen ist die erfindungsgemäße Wehrkante so zur Drehrichtung hin ge- schwenkt, dass damit auch der Strom des hinter der Wehrkante abströmenden Gutes zunächst noch in die Drehrichtung bewegt wird. Auf diese Weise wird das hinter der Wehrkante abströmende Gut erfindungsgemäß noch stärker auf eine nachfolgende Energierückgewinnungseinrichtung gerichtet, als dies bei herkömmlichen Vollmantelschneckenzentrifugen mit einer an der Wehrkante rein axialen Abströmung von geklärtem Gut der Fall ist. Instead, the weir edge according to the invention is pivoted toward the direction of rotation so that the flow of the material flowing behind the weir edge is initially also moved in the direction of rotation. In this way, according to the invention, the material flowing behind the weir edge is even more directed towards a subsequent energy recovery device than is the case in conventional solid bowl centrifuges with a purely axial outflow of clarified material at the weir edge.
Die erfindungsgemäße Lösung basiert auf der Erkenntnis, dass die energierück- gewinnende Wirkung von Energierückgewinnungseinrichtungen der genannten Art insbesondere darauf beruht, dass an diesen das Gut axial gegen die zugehörige Ablenkfläche strömt und diese dann in tangentialer Richtung verlässt. Dieses Auftreffen und Ablenken erzeugt eine besonders starke Impulsübertragung vom abströmenden Gut auf die Zentrifugentrommel. Wenn stattdessen das abströmende Gut als ein homogener Strom vergleichsweise sanft tangential entgegen der Drehrichtung abgelenkt wird, geht ein Großteil des Impulses des abströmenden Gutes als innere Flüssigkeitsreibung verloren. The solution according to the invention is based on the recognition that the energy-recovering effect of energy recovery devices of the type mentioned is based in particular on the fact that the material flows axially against the associated deflection surface and then leaves the latter in the tangential direction. This impact and deflection produces a particularly strong momentum transfer from the effluent to the centrifuge drum. If, instead, the outflowing good is deflected comparatively gently tangentially against the direction of rotation as a homogeneous stream, a large part of the momentum of the outflowing material is lost as internal liquid friction.
Die erfindungsgemäße Lösung ist entsprechend herkömmlichen Lösungen in Bezug auf die Menge an rückgewonnener Energie überlegen. Die derartige Wirkung der erfindungsgemäßen Lösung ist besonders ausgeprägt, indem die Wehrkante zumindest abschnittsweise zur Drehrichtung hin in einem Winkel von zwischen 2° bis 45°, vorzugsweise zwischen 5° und 30°, besonders bevorzugt zwischen 10° und 15°geschwenkt angeordnet ist. Ferner ist besonders bevorzugt die erfindungsgemäße Wehrkante insgesamt zur Drehrichtung hin ge- schwenkt angeordnet. In Strömungshchtung des über die Wehrkante abströmenden Gutes hinter der Wehrkante ist vorzugsweise eine, nach radial außen gerichtete Überströmungsfläche für das abströmende Gut ausgebildet ist. Mit der derartigen Überströmungsfläche wird das abströmende Gut vorteilhaft zumindest leicht nach radial außen geleitet, wodurch seine Abströmgeschwindigkeit etwas erhöht werden kann. Damit erhöht sich auch die Aufprallgeschwindigkeit des Gutes an der Energierückgewinnungseinrichtung, so dass dort eine besonders effiziente Impulsübertragung erreicht werden kann. Die derartige Überströmungsfläche erstreckt sich vorzugsweise entlang der gesamten Wehrkante und ist besonders vorteilhaft unmittelbar an die Wehrkante angrenzend gestaltet. The solution according to the invention is accordingly superior to conventional solutions in terms of the amount of energy recovered. Such an effect of the solution according to the invention is particularly pronounced in that the weir edge is at least partially pivoted towards the direction of rotation at an angle of between 2 ° to 45 °, preferably between 5 ° and 30 °, more preferably between 10 ° and 15 °. Furthermore, the inventive weir edge is particularly preferably arranged in a pivoted manner with respect to the direction of rotation. In Strömungshchtung of the flowing over the weir edge good behind the weir edge is preferably formed, directed radially outward overflow surface for the outflowing Good. With the overflow surface of this kind, the outflowing material is advantageously conducted at least slightly radially outward, so that its outflow speed can be increased somewhat. This also increases the impact speed of the goods at the energy recovery device, so that there a particularly efficient pulse transmission can be achieved. The overflow surface of this type preferably extends along the entire weir edge and is particularly advantageously configured directly adjacent to the weir edge.
Die Überströmungsfläche ist bevorzugt in Bezug auf die Längsachse nach radial außen hin in einem Winkel zwischen 10° und 65°, vorzugsweise zwischen 20° und 55°, besonders bevorzugt zwischen 30° und 45° geschwenkt angeordnet. Mit der derart nach außen geneigten Überströmungsfläche können für das abströmende Gut besonders vorteilhafte Abströmgeschwindigkeiten erzielt werden. The overflow surface is preferably arranged with respect to the longitudinal axis radially outwardly at an angle between 10 ° and 65 °, preferably between 20 ° and 55 °, more preferably between 30 ° and 45 ° pivoted. With the overflow surface inclined in this way outwards, particularly advantageous outflow rates can be achieved for the outflowing material.
Die erfindungsgemäße Energierückgewinnungseinrichtung ist entsprechend der obigen Erklärung vorzugsweise mit einer das abströmende Gut entgegen der Drehrichtung hin ablenkenden Ablenkfläche gestaltet. Dabei ist die Ablenkfläche vorteilhaft in Richtung der Längsachse betrachtet axial unmittelbar hinter der Wehrkante angeordnet. According to the above explanation, the energy recovery device according to the invention is preferably designed with a deflecting surface which deflects the outflowing material counter to the direction of rotation. In this case, the deflection surface is advantageously viewed axially in the direction of the longitudinal axis arranged immediately behind the weir edge.
Die Ablenkfläche ist in Richtung der Längsachse betrachtet vorzugsweise aus- schließlich radial außen von der Wehrkante angeordnet. Die derartige Ablenkfläche ist in radialer Richtung besonders klein und weist damit einen geringen Luftströmungswiderstand auf. Ferner bietet sie nur eine kleine Angriffsfläche für abströmendes Gut, welches an einer vorauseilenden Abströmöffnung verwirbelt wird. Derart an der nacheilenden Ablenkfläche anstoßendes Gut würde zu einer Ab- bremsung der Zentrifugentrommel beitragen. Um eine einfache Verstellung einer Teichtiefe an der erfindungsgemaßen Voll- mantelschneckenzentrifuge bei zugleich weiterhin wirksamer Energierückgewinnung zu erzielen, sind die erfindungsgemäße Wehrkante und ihre Energierückgewinnungseinrichtung vorzugsweise als eine an der Zentrifugentrommel gemein- sam verstellbare Baueinheit gestaltet. Entsprechend ist die Erfindung auch auf eine Baueinheit gerichtet, die von einer solchen erfindungsgemäßen Wehrkante und der zugehörigen Energierückgewinnungseinrichtung gebildet und zum Anbringen an einer Stirnseite einer Zentrifugentrommel vorgesehen ist. Kurzbeschreibung der Zeichnungen In the direction of the longitudinal axis, the deflection surface is preferably arranged exclusively radially on the outside of the weir edge. The deflection surface of this type is particularly small in the radial direction and thus has a low air flow resistance. Furthermore, it offers only a small attack surface for outflowing good, which is swirled at a leading outflow opening. Such an abutting material on the trailing deflection surface would contribute to a deceleration of the centrifuge drum. In order to achieve a simple adjustment of a pond depth at the full-shell screw centrifuge according to the invention, while at the same time still providing efficient energy recovery, the weir edge and its energy recovery device according to the invention are preferably designed as a unit which can be jointly adjusted on the centrifuge drum. Accordingly, the invention is also directed to a structural unit which is formed by such a weir edge according to the invention and the associated energy recovery device and is provided for attachment to a front side of a centrifuge drum. Brief description of the drawings
Nachfolgend wird ein Ausführungsbeispiel der erfindungsgemäßen Lösung anhand der beigefügten schematischen Zeichnungen näher erläutert. Es zeigt: Fig. 1 eine teilweise geschnittene Seitenansicht einer Zentrifugentrommel mitAn exemplary embodiment of the solution according to the invention will be explained in more detail below with reference to the attached schematic drawings. 1 shows a partially sectioned side view of a centrifuge drum with
Wehrplatte und Energierückgewinnungseinrichtung einer Vollmantelschne- ckenzentrifuge gemäß dem Stand der Technik, Weir plate and energy recovery device of a solid bowl screw centrifuge according to the prior art,
Fig. 2 den Schnitt II - II in Fig. 1 , 2 shows the section II - II in Fig. 1,
Fig. 3 eine teilweise geschnittene Seitenansicht einer Zentrifugentrommel mit Wehrplatte und Energierückgewinnungseinrichtung eines ersten Ausführungsbeispiels einer Vollmantelschneckenzentrifuge gemäß der Erfindung, Fig. 4 die Ansicht IV gemäß Fig. 3,  3 is a partially sectioned side view of a centrifuge drum with weir plate and energy recovery device of a first embodiment of a solid bowl screw centrifuge according to the invention, Fig. 4 shows the view IV of FIG. 3,
Fig. 5 den Schnitt V - V gemäß Fig. 4, 5 shows the section V - V of FIG. 4,
Fig. 6 eine teilweise geschnittene Seitenansicht einer Zentrifugentrommel mit Wehrplatte und Energierückgewinnungseinrichtung eines zweiten Ausführungsbeispiels einer Vollmantelschneckenzentrifuge gemäß der Erfindung, Fig. 7 die Ansicht VII gemäß Fig. 6 und  6 is a partially sectioned side view of a centrifuge drum with weir plate and energy recovery device of a second embodiment of a solid bowl screw centrifuge according to the invention, Fig. 7 shows the view VII of FIG. 6 and
Fig. 8 einen Teil einer Ansicht gemäß Fig. 7 eines dritten Ausführungsbeispiels einer Vollmantelschneckenzentrifuge gemäß der Erfindung. Detaillierte Beschreibung der Ausführungsbeispiele Fig. 8 shows a part of a view according to Fig. 7 of a third embodiment of a solid bowl screw centrifuge according to the invention. Detailed description of the embodiments
In den Fig. 1 und 2 ist von einer Vollmantelschneckenzent fuge 10 deren Zentrifu- gentrommel 12 mit ihrer Stirnwand 14 dargestellt. An der Stirnwand 14 ist eine von mehreren axial, in Richtung einer Längsachse 18 der Zentrifugentrommel 12 durch die Stirnwand 14 hindurchragenden Abströmöffnungen 16 veranschaulicht. Außenseitig vor der Abströmöffnung 16 ist an der Stirnwand 14 eine Wehrplatte 20 ortsfest, aber verstellbar angebracht. Die Wehrplatte 20 ragt bis vor die Abströmöffnung 16, so dass sie diese an ihrem radial äußeren Bereich außenseitig über- deckt. Dabei weist die Wehrplatte 20 an ihrem nach radial innen gerichteten Rand eine Wehrkante 22 auf. Die derartige Wehrkante 22 gemäß dem Stand der Technik erstreckt sich entlang der Stirnwand 14 und damit quer zur Längsachse 18 bzw. in einem Winkel von 90° zu dieser. Die Wehrkante 22 hält in der Zentrifugentrommel 12 geklärtes Gut 24 zurück, so dass sich im Betrieb der Vollmantelschne- ckenzentrifuge 10 dieses geklärte Gut 24 dort mit einer Teichtiefe 26 ansammelt und nachfolgend weitgehend kontinuierlich über die Wehrkante 22 hinweg abströmt. In Figs. 1 and 2 of a Vollmantelschneckenzent fuge 10 whose centrifuge drum 12 is shown with its end wall 14. On the end wall 14 one of a plurality of axially, in the direction of a longitudinal axis 18 of the centrifuge drum 12 through the end wall 14 protruding outflow openings 16 is illustrated. On the outside in front of the discharge opening 16, a weir plate 20 is stationary, but adjustably mounted on the end wall 14. The weir plate 20 projects up to the outflow opening 16 so that it covers the outside at its radially outer area. In this case, the weir plate 20 at its radially inwardly directed edge to a weir edge 22. The prior art weir edge 22 according to the prior art extends along the end wall 14 and thus transversely to the longitudinal axis 18 or at an angle of 90 ° to this. The weir edge 22 retains clarified product 24 in the centrifuge drum 12, so that during operation of the solid bowl screw centrifuge 10 this clarified material 24 accumulates there at a pond depth 26 and subsequently flows off substantially continuously over the weir edge 22.
In Strömungsrichtung des geklärten Gutes 24 hinter bzw. stromabwärts von der Wehrkante 22 befindet sich außen an der Wehrplatte 20 eine Energierückgewinnungseinrichtung 28 gemäß dem Stand der Technik. Diese Energierückgewinnungseinrichtung 28 ist als ein Abströmkanal 30 gestaltet, der eine sich auf der Höhe der Wehrkante 22 tangential erstreckende, ebene Bodenfläche 32 aufweist. Zu der Bodenfläche 32 erstreckt sich als Teil des Abströmkanals 30 senkrecht ei- ne Ablenkfläche 34, die sich gemäß dem Stand der Technik vor dem in Längsrichtung betrachtet offenen Bereich der Abströmöffnung 16 bogenförmig erstreckt. Die Ablenkfläche 34 lenkt das axial durch die Abströmöffnung 16 radial innen, unter der Wehrkante 22 in einer Einströmrichtung 38 heranströmende, geklärte Gut 24 in tangentialer Richtung zu einer Abströmrichtung 40 um. Dabei dreht sich die Zentrifugentrommel 12 in einer Drehrichtung 36 und das geklärte Gut 24 wird so von der Ablenkfläche 34 umgelenkt, dass es entgegen dieser Drehrichtung 36 tangential aus der Energierückgewinnungseinrichtung 28 austritt. Mit dem Austritt „stößt sich" das geklärte Gut 24 von der Zentrifugentrommel 12 ab, wodurch es auf diese einen Teil seines Impulses überträgt und zu einer Energierückgewinnung an der Zentrifugentrommel 12 beiträgt. Dieses„Abstoßen" wird durch die innere Flüssigkeitsreibung im geklärten Gut 24 und dadurch gemildert, dass sich die Zentrifugentrommel 12 zugleich in Drehrichtung 36 weiterdreht. Die Zentrifugentrommel 12 weicht dem Abstoß also teilweise aus. In the flow direction of the cleared material 24 behind or downstream of the weir edge 22 is located outside of the weir plate 20, an energy recovery device 28 according to the prior art. This energy recovery device 28 is designed as a discharge channel 30 which has a flat bottom surface 32 that extends tangentially at the height of the weir edge 22. As a part of the outflow channel 30, a deflecting surface 34, which according to the prior art extends in an arcuate manner in front of the region of the discharge opening 16 viewed in the longitudinal direction, extends perpendicular to the bottom surface 32. The deflecting surface 34 deflects the clarified good 24, which flows axially through the discharge opening 16 radially inwards, under the weir edge 22 in an inflow direction 38, in a tangential direction to a discharge direction 40. In this case, the centrifuge drum 12 rotates in a direction of rotation 36 and the clarified Good 24 is deflected by the deflection surface 34, that it counter to this direction of rotation 36th tangentially exits the energy recovery device 28. With the exit, the clarified material 24 "pushes off" the centrifuge drum 12, thereby transferring to it a portion of its momentum and contributing to energy recovery at the centrifuge drum 12. This "repulsion" is caused by internal fluid friction in the clarified product 24 and thereby alleviated that the centrifuge drum 12 continues to rotate in the direction of rotation 36 at the same time. The centrifuge drum 12 thus gives way to the repulsion partially.
In den Fig. 3 bis 5 ist ein Ausführungsbeispiel einer Vollmantelschneckenzentrifu- ge 10 mit deren Zentrifugentrommel 12 veranschaulicht, an deren Wehrplatte 20 eine Wehrkante 42 gemäß der Erfindung vorgesehen ist. Diese Wehrkante 42 ist in Bezug auf die Längsachse 18 in ihrer gesamten Erstreckung bzw. Länge als eine gerade Strecke um einen Winkel 44 von 10° hin zur Drehrichtung 36 geschwenkt. Die Wehrkante 42 erstreckt sich also nicht in Querrichtung, sondern zeigt außenseitig schräg zur Drehrichtung 36 hin. 3 to 5 an embodiment of a Vollmantelschneckenzentrifu- ge 10 is illustrated with the centrifuge drum 12, on whose weir plate 20, a weir edge 42 is provided according to the invention. This weir edge 42 is pivoted with respect to the longitudinal axis 18 in its entire extension or length as a straight line at an angle 44 of 10 ° to the direction of rotation 36. The weir edge 42 thus does not extend in the transverse direction, but points outside obliquely to the direction of rotation 36.
In Strömungsrichtung des geklärten Gutes 24 hinter der Wehrkante 42 befindet sich ein Abströmkanal 46 gemäß der Erfindung, der zunächst mit einer schräg nach radial außen geneigten, ebenen Überströmungsfläche 48 gestaltet ist. Die Überströmungsfläche 48 ist in einem Winkel 50 von 45° schräg zur Längsachse 18 der Zentrifugentrommel 12 geneigt und erstreckt sich über die gesamte Breite der Wehrkante 42. Die Überströmungsfläche 48 ist Teil einer Energierückgewinnungseinrichtung 52 gemäß der Erfindung und lenkt das über die schräge Wehrkante 42 abströmende Gut 24 geringfügig nach radial außen sowie entgegen der Drehrich- tung 36. Dabei wird dieses Gut 24 hinsichtlich seiner Strömungsgeschwindigkeit beschleunigt. Seine potentielle Energie wird damit zu einem gewissen Teil innerhalb der Energierückgewinnungseinrichtung 52 kinetische Energie gewandelt. In the flow direction of the clarified material 24 behind the weir edge 42 is a discharge channel 46 according to the invention, which is initially designed with an obliquely radially outwardly inclined, flat overflow surface 48. The overflow surface 48 is inclined at an angle 50 of 45 ° obliquely to the longitudinal axis 18 of the centrifuge drum 12 and extends over the entire width of the weir edge 42. The overflow surface 48 is part of an energy recovery device 52 according to the invention and directs the effluent over the sloping weir edge 42 Good 24 slightly radially outward and opposite to the direction of rotation 36. This good 24 is accelerated in terms of its flow velocity. Its potential energy is thus converted to a certain extent within the energy recovery device 52 kinetic energy.
Unmittelbar hinter der Überströmungsfläche 48 umfasst der Abströmkanal 46 der Energierückgewinnungseinrichtung 52 gemäß der Erfindung auch eine ebene Bodenfläche 54, die dabei aber etwas radial weiter außen liegt, als die Wehrkante 42. Ferner ist auch eine bogenförmige Ablenkfläche 56 vorgesehen. Dabei wird das abströmende Gut 24 von der Überströmungsfläche 48 geringfügig entgegen der Drehrichtung 36 wie oben erläutert besonders beschleunigt gegen diese Ablenkfläche 56 geleitet. Dadurch kann an dieser ein hoher Energieeintrag bzw. eine starke Impulsweitergabe von dem abströmenden, geklärten Gut 24 auf die Energierückgewinnungseinrichtung 52 erfolgen. Dadurch kann die Ablenkfläche 56 besonders klein gestaltet werden und es reicht aus, wenn sie sich radial nach innen nur bis auf die Tiefe der Wehrkante 42 erstreckt. Mit der derart kleinen Ablenkfläche 56 ergibt sich für die Energierückgewinnungseinrichtung 52 ein vergleichswei- se kleiner Strömungswiderstand außen an der ja mit hoher Geschwindigkeit rotierenden Zentrifugentrommel 12. Immediately behind the overflow surface 48, the outflow channel 46 of the energy recovery device 52 according to the invention also includes a flat bottom surface 54, which, however, lies slightly further outward than the weir edge 42. Furthermore, an arcuate deflection surface 56 is provided. In this case, the outflowing Good 24 of the overflow surface 48 slightly opposite to the direction of rotation 36 as explained above is particularly accelerated directed against this deflecting surface 56. As a result, a high energy input or a strong pulse transfer from the effluent, clarified good 24 to the energy recovery device 52 can take place there. As a result, the deflection surface 56 can be designed to be particularly small and it is sufficient if it extends radially inward only up to the depth of the weir edge 42. With such a small deflection surface 56, a comparatively small flow resistance results for the energy recovery device 52 at the outside of the centrifuge drum 12 rotating at high speed.
Die Fig. 6 und 7 zeigen ein erfindungsgemäß bevorzugtes Ausführungsbeispiel einer Wehrkante 42 mit einer Energierückgewinnungseinrichtung 52 gemäß der Erfindung, bei der die Wehrkante 42 in einem Winkel 44 von 20° schräg zur Längsachse 18 ausgerichtet ist. 6 and 7 show an inventively preferred embodiment of a weir edge 42 with an energy recovery device 52 according to the invention, in which the weir edge 42 is oriented at an angle 44 of 20 ° obliquely to the longitudinal axis 18.
In der Fig. 8 ist schließlich ein sehr ähnliches Ausführungsbeispiel gezeigt, bei dem die zugehörige Wehrplatte 20 mitsamt der erfindungsgemäßen Wehrkante 42 und der Energierückgewinnungseinrichtung 52 in einem Winkel 58 zwischen 5° und 10°, vorzugsweise von 8° aus der Tangentialrichtung entgegen der Drehrichtung 36 betrachtet nach radial innen geneigt ist. Finally, FIG. 8 shows a very similar exemplary embodiment, in which the associated weir plate 20 together with the weir edge 42 and the energy recovery device 52 at an angle 58 between 5 ° and 10 °, preferably 8 °, from the tangential direction counter to the direction of rotation 36 considered inclined radially inward.
Abschließend sei angemerkt, dass sämtlichen Merkmalen, die in den Anmel- dungsunterlagen und insbesondere in den abhängigen Ansprüchen genannt sind, trotz des vorgenommenen, formalen Rückbezugs auf einen oder mehrere bestimmte Ansprüche, auch einzeln oder in beliebiger Kombination eigenständiger Schutz zukommen soll. Bezugszeichenliste Finally, it should be noted that all the features mentioned in the application documents and in particular in the dependent claims should, despite the formal reference to one or more specific claims, also be granted individual protection or individual combination in any combination. LIST OF REFERENCE NUMBERS
10 Vollmantelschneckenzentrifuge 10 solid bowl centrifuge
12 Zentrifugentrommel  12 centrifuge drum
14 Stirnwand  14 front wall
16 Abströmöffnung  16 outflow opening
18 Längsachse der Zentrifugentrommel  18 longitudinal axis of the centrifuge drum
20 Wehrplatte 20 weir plate
22 Wehrkante gemäß dem Stand der Technik  22 Weir edge according to the prior art
24 geklärtes Gut  24 clarified good
26 Teichtiefe  26 pond depth
28 Energierückgewinnungseinrichtung gemäß dem Stand der Technik 30 Abströmkanal gemäß dem Stand der Technik  28 Energy recovery device according to the prior art 30 outflow channel according to the prior art
32 Bodenfläche gemäß dem Stand der Technik  32 floor surface according to the prior art
34 Ablenkfläche gemäß dem Stand der Technik  34 deflection surface according to the prior art
36 Drehrichtung  36 direction of rotation
38 Einströmrichtung des geklärten Gutes (axial)  38 inflow direction of the clarified material (axial)
40 Ausströmrichtung des geklärten Gutes (tangential) 40 discharge direction of the clarified material (tangential)
42 Wehrkante gemäß der Erfindung  42 weir edge according to the invention
44 Winkel der Schrägstellung der Wehrkante relativ zur Längsachse 44 angle of inclination of the weir edge relative to the longitudinal axis
46 Abströmkanal gemäß der Erfindung 46 outflow channel according to the invention
48 Überströmungsfläche gemäß der Erfindung  48 overflow surface according to the invention
50 Winkel der Schrägstellung der Überströmungsfläche 50 angle of inclination of the overflow surface
relativ zur Längsachse  relative to the longitudinal axis
52 Energierückgewinnungseinrichtung gemäß der Erfindung  52 energy recovery device according to the invention
54 Bodenfläche gemäß der Erfindung  54 floor surface according to the invention
56 Ablenkfläche gemäß der Erfindung  56 deflection surface according to the invention
58 Winkel der Neigung der Bodenfläche relativ zur Radialrichtung 58 angle of inclination of the ground surface relative to the radial direction

Claims

Ansprüche claims
1 . Vollmantelschneckenzentrifuge (10) mit einer sich im Betrieb um eine1 . Solid bowl centrifuge (10) with one in operation by a
Längsachse (18) in einer Drehrichtung (36) drehbaren Zentrifugentrommel (12), an deren Stirnseite mindestens eine Abströmöffnung (16) zum Abströmen von geklärtem Gut (24) aus der Zentrifugentrommel (12), eine die Abströmöffnung (16) nach radial außen hin begrenzende Wehrkante (22, 42) und eine sich an der Wehrkante (22, 42) befindende Energierückgewinnungseinrichtung (28, 52) zum Rückgewin- nen von Energie des abströmenden, geklärten Gutes (24) ausgebildet sind, bei der von der Längsachse (18) aus betrachtet die Wehrkante (42) zumindest abschnittsweise zur Drehrichtung (36) hin geschwenkt angeordnet ist. Longitudinal axis (18) in a rotational direction (36) rotatable centrifuge drum (12), at the end face at least one outflow opening (16) for discharge of clarified Good (24) from the centrifuge drum (12), one the outflow opening (16) radially outward limiting weir edge (22, 42) and an at the weir edge (22, 42) located energy recovery means (28, 52) for recovering energy of the outflowing, clarified good (24) are formed, in which from the longitudinal axis (18) seen from the weir edge (42) is arranged at least partially pivoted to the direction of rotation (36).
2. Vollmantelschneckenzentrifuge nach Anspruch 1 , 2. solid bowl centrifuge according to claim 1,
bei der die Wehrkante (42) zumindest abschnittsweise zur Drehrichtung (36) hin in einem Winkel von zwischen 2° bis 45°, vorzugsweise zwischen 5° und 30°, besonders bevorzugt zwischen 10° und 15°geschwenkt angeordnet ist. in which the weir edge (42) at least in sections to the direction of rotation (36) is arranged at an angle of between 2 ° to 45 °, preferably between 5 ° and 30 °, more preferably between 10 ° and 15 ° pivoted.
3. Vollmantelschneckenzentrifuge nach Anspruch 1 oder 2, 3. solid bowl centrifuge according to claim 1 or 2,
bei der die Wehrkante (42) insgesamt zur Drehrichtung (36) hin geschwenkt angeordnet ist. in which the weir edge (42) is arranged in total pivoted to the direction of rotation (36).
4. Vollmantelschneckenzentrifuge nach einem der Ansprüche 1 bis 3, bei der in Strömungsrichtung des über die Wehrkante (42) abströmenden Gutes (24) hinter der Wehrkante (42) eine, nach radial außen geschwenkte Überströmungsfläche (48) für das abströmende Gut (24) ausgebildet ist. 4. solid bowl screw centrifuge according to one of claims 1 to 3, wherein in the flow direction of the over the weir edge (42) effluent (24) behind the weir edge (42), a radially outwardly swung overflow surface (48) for the effluent (24) is trained.
5. Vollmantelschneckenzentrifuge nach Anspruch 4, 5. solid bowl screw centrifuge according to claim 4,
bei der sich die Überströmungsfläche (48) entlang der gesamten Wehrkante (42) erstreckt. in which the overflow surface (48) extends along the entire weir edge (42) extends.
6. Vollmantelschneckenzentrifuge nach einem der Ansprüche 4 oder 5, bei der die Überströmungsfläche (48) in Bezug auf die Längsachse (18) nach ra- dial außen hin in einem Winkel zwischen 10° und 65°, vorzugsweise zwischen 20° und 55°, besonders bevorzugt zwischen 30° und 45° geschwenkt angeordnet ist. 6. A solid bowl centrifuge according to one of claims 4 or 5, in which the overflow surface (48) with respect to the longitudinal axis (18) points radially outwardly at an angle between 10 ° and 65 °, preferably between 20 ° and 55 °, is preferably arranged pivoted between 30 ° and 45 °.
7. Vollmantelschneckenzentrifuge nach einem der Ansprüche 1 bis 6, bei der die Energierückgewinnungseinrichtung (52) mit einer das abströmende Gut (24) entgegen der Drehrichtung (36) hin ablenkenden Ablenkfläche (56) gestaltet ist. 7. solid bowl screw centrifuge according to one of claims 1 to 6, wherein the energy recovery device (52) with a the outflow Good (24) against the direction of rotation (36) towards deflecting deflection surface (56) is designed.
8. Vollmantelschneckenzentrifuge nach Anspruch 7, 8. solid bowl screw centrifuge according to claim 7,
bei der die Ablenkfläche (56) in Richtung der Längsachse (18) betrachtet axial hin- ter der Wehrkante (42) angeordnet ist. in which the deflecting surface (56), viewed in the direction of the longitudinal axis (18), is arranged axially behind the weir edge (42).
9. Vollmantelschneckenzentrifuge nach Anspruch 7 oder 8, 9. solid bowl screw centrifuge according to claim 7 or 8,
bei der die Ablenkfläche (56) in Richtung der Längsachse (18) betrachtet ausschließlich radial außen von der Wehrkante (42) angeordnet ist. in which the deflecting surface (56), viewed in the direction of the longitudinal axis (18), is arranged exclusively radially outside of the weir edge (42).
10. Vollmantelschneckenzentrifuge nach einem der Ansprüche 1 bis 9, bei der die Wehrkante (42) und die Energierückgewinnungseinrichtung (52) als eine an der Zentrifugentrommel (12) gemeinsam verstellbare Baueinheit gestaltet sind. 10. Solid bowl screw centrifuge according to one of claims 1 to 9, wherein the weir edge (42) and the energy recovery device (52) are designed as a on the centrifuge drum (12) together adjustable unit.
EP13801466.7A 2013-01-29 2013-11-08 Solid-wall screw centrifuge having a weir edge Active EP2950932B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013001436.0A DE102013001436A1 (en) 2013-01-29 2013-01-29 Solid bowl centrifuge with a weir edge
PCT/DE2013/100379 WO2014117760A1 (en) 2013-01-29 2013-11-08 Solid-wall screw centrifuge having a weir edge

Publications (2)

Publication Number Publication Date
EP2950932A1 true EP2950932A1 (en) 2015-12-09
EP2950932B1 EP2950932B1 (en) 2020-01-22

Family

ID=49724430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13801466.7A Active EP2950932B1 (en) 2013-01-29 2013-11-08 Solid-wall screw centrifuge having a weir edge

Country Status (5)

Country Link
US (1) US10105716B2 (en)
EP (1) EP2950932B1 (en)
DE (1) DE102013001436A1 (en)
DK (1) DK2950932T3 (en)
WO (1) WO2014117760A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2331264B1 (en) * 2008-08-15 2017-05-03 M-I Llc Centrifuge
DE102012106226A1 (en) * 2012-07-11 2014-01-16 Gea Mechanical Equipment Gmbh Solid bowl centrifuge with overflow weir
JP5220950B1 (en) * 2012-11-02 2013-06-26 巴工業株式会社 Centrifugal separator with separation liquid injection nozzle
DE102013001436A1 (en) * 2013-01-29 2014-07-31 Flottweg Se Solid bowl centrifuge with a weir edge
EP2789395B2 (en) * 2013-04-08 2019-11-06 Flottweg SE Solid bowl screw centrifuge with an energy recovery device
DE102014101205B4 (en) * 2014-01-31 2021-08-05 Flottweg Se Outlet device of a solid bowl screw centrifuge
DE102014104296A1 (en) * 2014-03-27 2015-10-01 Flottweg Se Outlet device of a solid bowl screw centrifuge
DE102017130904B4 (en) * 2017-12-21 2019-07-11 Flottweg Se Outlet device of a solid bowl screw centrifuge with a deflection chute

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575370A (en) * 1984-11-15 1986-03-11 Pennwalt Corporation Centrifuge employing variable height discharge weir
DE3446166A1 (en) 1984-12-18 1986-06-26 Flottweg-Werk Bird Machine GmbH, 8313 Vilsbiburg ADJUSTABLE WEARD PLATE FOR FULL-COVERED SCREW CENTRIFUGES
DE3921327A1 (en) * 1989-06-29 1991-01-03 Kloeckner Humboldt Deutz Ag WEIR FOR ADJUSTING THE LIQUID LEVEL IN FULL-COAT CENTRIFUGES
JP3543597B2 (en) * 1997-12-22 2004-07-14 株式会社クボタ Separation water discharge device in horizontal centrifuge
US20040072668A1 (en) * 2002-10-15 2004-04-15 Baker Hughes Incorporated Liquid phase discharge port incorporating chamber nozzle device for centrifuge
US7022061B2 (en) * 2002-10-15 2006-04-04 Andritz Ag Centrifuge discharge port with power recovery
EP2331264B1 (en) * 2008-08-15 2017-05-03 M-I Llc Centrifuge
DK200801846A (en) * 2008-12-30 2010-07-01 Alfa Laval Corp Ab A decanter centrifuge with a slide valve body
DK200801848A (en) * 2008-12-30 2010-07-01 Alfa Laval Corp Ab A decanter centrifuge and a decanter centrifuge discharge port memeber.
DE102010032503A1 (en) 2010-07-28 2012-02-02 Gea Mechanical Equipment Gmbh Solid bowl centrifuge with overflow weir
DK178253B1 (en) * 2010-11-12 2015-10-12 Alfa Laval Corp Ab A centrifugal separator and an outlet element for a centrifugal separator
ES2606134T3 (en) * 2011-07-29 2017-03-22 Andritz S.A.S. Centrifuge and centrifugal discharge orifice member for power reduction
DE102012106226A1 (en) * 2012-07-11 2014-01-16 Gea Mechanical Equipment Gmbh Solid bowl centrifuge with overflow weir
DE102012014563B4 (en) * 2012-07-23 2014-12-11 Flottweg Se Solid bowl screw centrifuge with an energy recovery device
DE102013001436A1 (en) * 2013-01-29 2014-07-31 Flottweg Se Solid bowl centrifuge with a weir edge
EP2789395B2 (en) * 2013-04-08 2019-11-06 Flottweg SE Solid bowl screw centrifuge with an energy recovery device
DE102014101205B4 (en) * 2014-01-31 2021-08-05 Flottweg Se Outlet device of a solid bowl screw centrifuge
DE102014104296A1 (en) * 2014-03-27 2015-10-01 Flottweg Se Outlet device of a solid bowl screw centrifuge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014117760A1 *

Also Published As

Publication number Publication date
DE102013001436A1 (en) 2014-07-31
WO2014117760A1 (en) 2014-08-07
EP2950932B1 (en) 2020-01-22
DK2950932T3 (en) 2020-04-14
US10105716B2 (en) 2018-10-23
US20150360240A1 (en) 2015-12-17

Similar Documents

Publication Publication Date Title
EP2950932B1 (en) Solid-wall screw centrifuge having a weir edge
DE102014101205B4 (en) Outlet device of a solid bowl screw centrifuge
EP2872256B1 (en) Solid-bowl screw centrifuge with overflow weir
EP2789395B2 (en) Solid bowl screw centrifuge with an energy recovery device
DE102012014563B4 (en) Solid bowl screw centrifuge with an energy recovery device
DE1301796B (en) Hydrocyclone
EP2643596B1 (en) Self-cleaning centrifugal screw pump with auxiliary flushing flow behind the impeller
EP2923769B1 (en) Outlet device of a solid bowl worm centrifuge
DE102012004544B4 (en) Drum centrifuge with an inlet accelerator
EP2551019B1 (en) Solid bowl screw centrifuge with a weir edge
EP3959380A1 (en) Apparatus for conveying and discharging bulk material or snow
DE102006011452A1 (en) Centrifuge with an inlet pipe
EP2551020A1 (en) Inlet device of a centrifuge
EP0501134B1 (en) Cleaner for stock suspensions
DE2013499A1 (en) Arrangement for a cyclone separator with an emptying chamber
DE1757368C3 (en) Solid bowl screw centrifuge
DE2026479C3 (en) Continuously working centrifuge
DE102009038743A1 (en) Centripetal pump for centrifuge, particularly for separator, is provided with disk-shaped base section and tubular shank, where base section extends to inner side of centrifuge drainage channel
DE102014108722A1 (en) screw centrifuge
DE102017130904B4 (en) Outlet device of a solid bowl screw centrifuge with a deflection chute
EP2524725A1 (en) Device for removing screenings from a liquid
DE102009007637A1 (en) Fiber suspensions sorting method for producing e.g. paper, involves attaching flow guide element to closure surfaces, where curl sections formed on closure surfaces are controlled by flow guide element
DE2609673B2 (en) Extraction tower for countercurrent leaching of sugar beet pulp
EP4371668A1 (en) Agitator mill with basket having slits
DE202017004166U1 (en) Knife ring

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: 20150812

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190924

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502013014252

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1226583

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200215

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

Effective date: 20200407

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20200122

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200614

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200422

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

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200522

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200422

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200423

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502013014252

Country of ref document: DE

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

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20201023

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

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

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

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Effective date: 20201108

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: 20201108

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20201130

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

Ref country code: CH

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

Effective date: 20201130

Ref country code: LI

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

Effective date: 20201130

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

Ref country code: IE

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

Effective date: 20201108

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: 20201108

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

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

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

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200122

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

Ref country code: BE

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

Effective date: 20201130

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230531

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

Ref country code: TR

Payment date: 20231024

Year of fee payment: 11

Ref country code: SE

Payment date: 20231123

Year of fee payment: 11

Ref country code: IT

Payment date: 20231124

Year of fee payment: 11

Ref country code: FR

Payment date: 20231123

Year of fee payment: 11

Ref country code: DK

Payment date: 20231123

Year of fee payment: 11

Ref country code: DE

Payment date: 20231129

Year of fee payment: 11

Ref country code: AT

Payment date: 20231117

Year of fee payment: 11