EP1345700A1 - Solid-bowl screw centrifuge - Google Patents

Solid-bowl screw centrifuge

Info

Publication number
EP1345700A1
EP1345700A1 EP01271978A EP01271978A EP1345700A1 EP 1345700 A1 EP1345700 A1 EP 1345700A1 EP 01271978 A EP01271978 A EP 01271978A EP 01271978 A EP01271978 A EP 01271978A EP 1345700 A1 EP1345700 A1 EP 1345700A1
Authority
EP
European Patent Office
Prior art keywords
drum
screw
centrifuge according
solid bowl
screw centrifuge
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
EP01271978A
Other languages
German (de)
French (fr)
Other versions
EP1345700B1 (en
Inventor
Jürgen HERMEIER
Paul BRÜNING
Ludger HORSTKÖTTER
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.)
GEA Mechanical Equipment GmbH
Original Assignee
Westfalia Separator Industry GmbH
Westfalia Separator GmbH
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 Westfalia Separator Industry GmbH, Westfalia Separator GmbH filed Critical Westfalia Separator Industry GmbH
Publication of EP1345700A1 publication Critical patent/EP1345700A1/en
Application granted granted Critical
Publication of EP1345700B1 publication Critical patent/EP1345700B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B04B2001/2066—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 additional disc stacks
    • 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 according to the preamble of claim 1.
  • US Pat. No. 5,310,399 shows plates which are arranged on the screw body, namely between several screw flights of the screw.
  • the concentrate is drained off on a larger diameter of the nozzles and the clarified phase in the center.
  • a solid space is formed outside the plate pack, which is conical on both sides
  • the outer diameter of this separator is, for example, in the SU 385 629 on a larger radius than the outer diameter of the decanter.
  • the invention has the task of attaching the plate packs to the
  • the plate pack is arranged in a cylindrical portion of the drum space with a substantially constant diameter and the plate pack is directly connected upstream of the liquid drain, whereby it rests on the drum cover and / or is arranged on it ,
  • the plate pack Since the plate pack lies directly on the drum cover or is attached to it, it no longer rotates at a differential speed to the drum casing, but rotates with it.
  • this plate insert connected to the liquid-side drum wall has no troublesome short-circuit connections between the Klaasensammelletechnisch of the plate insert and the solid space outside the plate insert.
  • the concentrate compartment of the plate insert is located on the outside of the plate package, in which the diameter of the drum casing can be carried out continuously and does not require any expansion. In this way, mixtures that are difficult to clarify can also be separated, e.g. Mix with fine suspended matter.
  • the drum cover is essentially conical, which makes it particularly easy to attach the preferably pre-assembled plate packs.
  • Ketvenez allows on the drum cover, especially since the plates of the plate pack are also preferably conical.
  • the clear phase collecting line is at a lower level
  • a plate is provided which has a disk-like inner section and a conical outer section, the maximum radial extent of the plate being less than the radial extent of the snail blade.
  • the conical section of the plate and the conical drum cover formed opposite to the conical section of the plate hereby form a double-conically tapering solid or concentrate collecting space, which is a particularly advantageous one
  • the concentrate can be drained off to the drum casing, in particular by means of a scraper on the first screw blade which penetrates the plate.
  • FIG. 1 shows a section through a solid-bowl screw centrifuge according to the invention.
  • FIG. 2 shows a section through a partial area of the solid bowl screw centrifuge according to the invention.
  • FIG. 1 shows a solid bowl screw centrifuge which, in addition to the components not to be explained further here, such as drive A and the machine frame
  • M has a centrifugal drum with a drum casing 1 and with a screw 2, the screw 2 comprising a screw body 3 and a screw blade 4 surrounding the screw body 3 several times. Between Screw flights 4 is a conveyor track for conveying / transporting a centrifugal material to be processed.
  • the screw body 3 has a slightly stepped cylindrical section 5a in the rear region and a conically tapering section 5b adjoining it.
  • the cylindrical section 5 a is axially closed by a drum cover 7 which is conical at least in the area of the drum space 6 between the screw body 3 and the drum shell 1.
  • the centrifuged material S is passed through the centrally arranged and rotating inlet pipe 12 via a distributor 20 into the drum space 6 with the screw 2 and the drum casing 1 surrounding the screw 2. Due to the action of gravity, the solid particles settle on the inner one in a very short time
  • the distributor 20 and the co-rotating inlet pipe 12 form an advantageously hygienic, largely sealed system.
  • the screw 2 rotates at a slightly lower or greater speed than the drum 1 and conveys the ejected solid to the conical section from the drum to the solid discharge.
  • the liquid flows to the cylindrical section 5a at the rear end of the drum 1 and is discharged there.
  • Snail body arranged, which has a disc-like inner section 8a and preferably a stabilizing, conical outer section 8b, the maximum radial extent of the plate 8 is less than the radial Extension of the screw blade 4.
  • At least one opening for a liquid passage is formed on the inside diameter of the disk 8, here an annular gap 21.
  • the conical plates 11 are essentially designed to correspond to the conicity of the drum cover 7.
  • a plate pack 9 is arranged, which is designed as a preassembled unit and is attached directly to the inside of the drum cover 7.
  • the plate pack has a “distributor-shaped” holder 10, which comprises an inner cylindrical section 10a and an axially adjoining conical section 10b.
  • the actual conical plates 11 are arranged between the conical section 10b and the drum cover 7, which are preferably spaced apart by means of spacers which are adapted to the respective application (molded strips, punctiform spacers, etc.).
  • Rising channels 13 are formed in the outer area of the plates 1 and also pass through the conical section 10b.
  • the plate pack 9 can be designed such that the centrifugal material to be clarified is supplied radially from the outside (not shown here).
  • the clear phase is derived through a manifold 14 on the inner diameter of the plate 11 in the wall of the cylindrical section 10b.
  • the manifold 14 is preferably at least partially on a smaller diameter than the outer wall of the screw body 3, which requires a more energy-efficient operation than arranging the manifold on a larger diameter, which is also conceivable in theory.
  • the manifold 14 is axially continued in a bore 15 of the drum cover, which opens into a radially outwardly extending outlet 16 for the clear phase.
  • the concentrate chamber is located here on the outside of the plate pact 9, the diameter of the drum casing 1 being continuous and does not include any expansion.
  • the concentrate is removed by means of the screw 2, the screw for discharging the solid from the concentrate space has a clearing attachment 17 which passes through the plate 8.
  • the diameter of the drum casing 1 is essentially constant in this area.
  • ribs 23 are also advantageously formed on the side facing away from the plates 9 to support the introduction of the centrifuged material into the plate pack.
  • the centrifugal material passing through the annular gap 21 flows at the ribs 23 into the rising channels 13 of the plate pack 9, where the clear phase to the collecting line and the solids are discharged to the outside.
  • the solids are carried along by the broach 17 and conveyed by the screw to the conical section 5b.
  • the system or the plate pack can be cleaned by a backwashing device. If necessary, the cleaning effect can be supported by emptying via a nozzle in the outlet 16 and a centrifugal valve 19.
  • the distance between the plates 11 of the plate package 9 is preferably greater than 0.5 mm and less than 3 mm; measured perpendicular to the surface of the plate.
  • the angle of inclination of the conical plates to the drum axis is preferably between 35 ° and 55 °, in particular 40 ° to 50 °.
  • the diameter of the plates 11 on the outer edge is particularly preferably approximately 50 to 75%, in particular 2/3 of the diameter of the free screw region or the drum space.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

The present invention is a solid-bowl screw centrifuge that includes a centrifugal drum. The drum has a drum casing and a screw with a screw body that is surrounded by a screw blade. The screw blade forms at least one screw spiral with a conveying path for transporting material to be centrifuged. The centrifuge also includes an inlet into the centrifugal drum, at least one solid matter discharge and at least one liquid outlet. The centrifuge includes a drum chamber that is axially closed by a drum cover having essentially a conical shape. Further included is a disk stack having at least one conical disk, and the disk stack is mounted to the drum cover directly upstream of the liquid outlet. At least a portion of the disk stack is arranged in a cylindrical section of the drum chamber that has an essentially constant diameter. A screw disk is arranged on the screw body between the drum cover and a first screw spiral.

Description

Vollmantel-Schneckenzentrifuge mit Tellereinsatz Solid bowl screw centrifuge with plate insert
, . Die Erfindung betrifft eine Vollmantel-Schneckenzentrifuge nach dem Oberbegriff des Anspruches 1.,. The invention relates to a solid bowl screw centrifuge according to the preamble of claim 1.
Aus dem Stand der Technik ist es bereits bekannt, auch bei Vollmantel- Schneckenzentrifugen Telleranordnungen vorzusehen.It is already known from the prior art to provide plate arrangements even in solid-bowl screw centrifuges.
So zeigt die US 5 310 399 Teller, welche auf dem Schneckenkörper angeordnet sind und zwar zwischen mehreren Schneckengängen der Schnecke.For example, US Pat. No. 5,310,399 shows plates which are arranged on the screw body, namely between several screw flights of the screw.
Eine ähnliche Konstruktion ist aus der DE 26 17 692 bekannt. Auch in dieser mehrstufigen Dekanteranordnung liegen die Teller jeweils auf der Schnecke.A similar construction is known from DE 26 17 692. In this multi-stage decanter arrangement, the plates are always on the screw.
Daneben gibt es auch Konstruktionen, bei denen eine Art Tellertrommel der eigentlichen Dekantertrommel nachgeschaltet wird (siehe z.B. die IT 496 031 oder die SU 385 629).There are also designs in which a kind of plate drum is connected downstream of the actual decanter drum (see e.g. IT 496 031 or SU 385 629).
Weitere bekannte Kombinationen von Vollmantel-Schneckenzentrifugen mit Tel- lereinsätzen sind aus der WO 98/45045, der FR 1 449 064, der FR 2 532 189 und der GB 998 669 bekannt.Further known combinations of solid-bowl screw centrifuges with bowl inserts are known from WO 98/45045, FR 1 449 064, FR 2 532 189 and GB 998 669.
Bei Dekantern, denen als eine Baueinheit eine Art kompletter Separator nachgeschaltet wird, erfolgt die Nachklärung des im Dekanter vorgeklärten Produktes im Grunde wie bei einer vollständig getrennten Reihenschaltung von Dekanter undIn the case of decanters, which are followed by a type of complete separator as a structural unit, the clarification of the product pre-clarified in the decanter is basically the same as with a completely separate series connection of decanter and
Separator.Separator.
Im Separator mit dem Tellerpaket wird dabei auf einem größeren Durchmesser der Düsen das Konzentrat und im Zentrum die geklärte Phase abgeleitet. Außerhalb des Tellerpakets ist ein Feststoffraum ausgebildet, der auf beiden Seiten durch konischeIn the separator with the plate pack, the concentrate is drained off on a larger diameter of the nozzles and the clarified phase in the center. A solid space is formed outside the plate pack, which is conical on both sides
Wandungen begrenzt wird. Der Außendurchmesser dieses Separators liegt z.B. in der SU 385 629 auf einem größeren Radius als der Außendurchmesser des Dekan- ters.Walls is limited. The outer diameter of this separator is, for example, in the SU 385 629 on a larger radius than the outer diameter of the decanter.
Die eingangs genannten weiteren Dekanterkonstruktionen mit integrierten Teller- paketen zeichnen sich dadurch aus, daß die Tellerpakete jeweils auf den Schnek- kenkörpem angebracht sind und somit mit einer Differenzdrehzahl zum Trommelmantel rotieren. Hieraus bedingen sich zwangsläufig störende Spalte, ferner ist keine optimale Ausnutzung des Bauraumes möglich.The other decanter designs mentioned at the outset with integrated plate packs are distinguished by the fact that the plate packs are each mounted on the screw body and thus rotate at a differential speed to the drum casing. This inevitably leads to annoying gaps, and optimal use of the installation space is also not possible.
Die Erfindung hat die Aufgabe, die aus der Befestigung der Tellerpakete auf denThe invention has the task of attaching the plate packs to the
Schneckenkörper resultierenden Probleme zu vermeiden.To avoid snail body resulting problems.
Die Erfindung löst diese Aufgabe durch den Gegenstand des Anspruches 1. Dabei ist das Tellerpaket in einem zylindrischen Abschnitt der Trommelraumes mit im wesentlichen konstanten Durchmesser angeordnet und das Tellerpaket ist direkt dem Flüssigkeitsablauf vorgeschaltet, wobei es am Trommel deckel anliegt und/oder an diesem angeordnet ist.The invention solves this problem by the subject matter of claim 1. Here, the plate pack is arranged in a cylindrical portion of the drum space with a substantially constant diameter and the plate pack is directly connected upstream of the liquid drain, whereby it rests on the drum cover and / or is arranged on it ,
Da das Tellerpaket direkt am Trommeldeckel anliegt oder an diesem befestigt ist, rotiert es nicht mehr mit einer Differenzdrehzahl zum Trommelmantel sondern dreht sich mit diesem mit.Since the plate pack lies directly on the drum cover or is attached to it, it no longer rotates at a differential speed to the drum casing, but rotates with it.
Im Gegensatz zu Tellereinsätzen auf der Schnecke treten bei diesem mit der flüs- sigkeitsseitigen Trommelwand verbundenen Tellereinsatz keine störenden Kurz- Schlußverbindungen zwischen der Kla hasensammelleitung des Tellereinsatzes und dem Feststoffraum außerhalb des Tellereinsatzes auf. Der Konzentratraum des Tellereinsatzes befindet sich außen am Tellerpaket, in welchem der Durchmesser des Trommelmantels durchgehend ausführbar ist und keiner Erweiterung bedarf. Auf diese Weise lassen sich auch schwer klärbare Gemische trennen, z.B. Gemi- sehe mit feinen Schwebstoffen.In contrast to plate inserts on the screw, this plate insert connected to the liquid-side drum wall has no troublesome short-circuit connections between the Klaasensammelleleitung of the plate insert and the solid space outside the plate insert. The concentrate compartment of the plate insert is located on the outside of the plate package, in which the diameter of the drum casing can be carried out continuously and does not require any expansion. In this way, mixtures that are difficult to clarify can also be separated, e.g. Mix with fine suspended matter.
Vorzugsweise wird der Trommeldeckel im wesentlichen konisch ausgebildet, was eine besonders einfache Befestigung der vorzugsweise vormontierten Tellerpa- keteinheit am Trommeldeckel ermöglicht, zumal die Teller des Tellerpaketes ebenfalls bevorzugt konisch ausgebildet sind.Preferably, the drum cover is essentially conical, which makes it particularly easy to attach the preferably pre-assembled plate packs. Keteinheit allows on the drum cover, especially since the plates of the plate pack are also preferably conical.
Besonders hervorzuheben ist noch, daß nach einer weiteren bevorzugten Ausfüh- rungsform der Erfindung die Klarphasensammelleitung auf einem niedrigerenIt should be particularly emphasized that, according to a further preferred embodiment of the invention, the clear phase collecting line is at a lower level
Durchmesser als die Außenwandung des Schneckenkörpers liegt.Diameter than the outer wall of the screw body.
Ebenfalls weiter hervorzuheben ist noch, daß zwischen dem vom Trommeldeckel aus betrachtet ersten Schneckengang und dem Trommeldeckel ein Teller vorgese- hen ist, welcher einen scheibenartigen inneren Abschnitt und einen konischen äußeren Abschnitt aufweist, wobei die maximal radiale Erstreckung des Tellers geringer ist als die radiale Erstreckung des Schneckenblattes. Der konische Abschnitt des Tellers sowie der entgegengesetzt zum konischen Abschnitt des Tellers ausgebildete konische Trommeldeckel bilden hiermit einen zweifach sich konisch verjün- genden Feststoff- bzw. Konzentratsammeiraum, der eine besondere vorteilhafteIt should also be further emphasized that between the first worm gear viewed from the drum cover and the drum cover, a plate is provided which has a disk-like inner section and a conical outer section, the maximum radial extent of the plate being less than the radial extent of the snail blade. The conical section of the plate and the conical drum cover formed opposite to the conical section of the plate hereby form a double-conically tapering solid or concentrate collecting space, which is a particularly advantageous one
Ableitung des Konzentrates zum Trommelmantel hin ermöglicht, insbesondere mittels eines Räumers am ersten Schneckenblatt, welches den Teller durchsetzt.The concentrate can be drained off to the drum casing, in particular by means of a scraper on the first screw blade which penetrates the plate.
Weitere vorteilhafte Ausführungen sind den übrigen Unteransprüchen zu entneh- men.Further advantageous designs can be found in the remaining subclaims.
Nachfolgend werden Ausführungsbeispiele anhand der Zeichnung näher beschrieben. Es zeigt:Exemplary embodiments are described in more detail below with reference to the drawing. It shows:
Fig. 1 einen Schnitt durch eine erfmdungsgemäße Vollmantel- Schneckenzentrifüge; und1 shows a section through a solid-bowl screw centrifuge according to the invention; and
Fig. 2 einen Schnitt durch einen Teilbereich der erfindungsgemäßen Voll- mantel-Schneckenzentrifüge.2 shows a section through a partial area of the solid bowl screw centrifuge according to the invention.
Fig. 1 zeigt eine Vollmantel-Schneckenzentrifuge, welche neben den hier nicht weiter zu erläuternden Bestandteilen wie dem Antrieb A und dem Maschinengestell1 shows a solid bowl screw centrifuge which, in addition to the components not to be explained further here, such as drive A and the machine frame
M eine Schleudertrommel mit einem Trommelmantel 1 und mit einer Schnecke 2 aufweist, wobei die Schnecke 2 einen Schneckenkörper 3 sowie ein den Schnek- kenkörper 3 mehrfach umgebendes Schneckenblatt 4 umfaßt. Zwischen den Schneckengängen 4 ist eine Förderbahn zum Fördern/Transport eines zu verarbeitenden Schleudergutes ausgebildet.M has a centrifugal drum with a drum casing 1 and with a screw 2, the screw 2 comprising a screw body 3 and a screw blade 4 surrounding the screw body 3 several times. Between Screw flights 4 is a conveyor track for conveying / transporting a centrifugal material to be processed.
Der Schneckenkörper 3 weist einen im hinteren Bereich leicht gestuften, zylindri- sehen Abschnitt 5a und einen sich darin anschließenden konisch verjüngenden Abschnitt 5b auf. Der zylindrische Abschnitt 5 a wird axial von einem sich zumindest im Bereich des Trommelraumes 6 zwischen dem Schneckenkörper 3 und dem Trommelmantel 1 konisch ausgebildeten Trommeldeckel 7 verschlossen.The screw body 3 has a slightly stepped cylindrical section 5a in the rear region and a conically tapering section 5b adjoining it. The cylindrical section 5 a is axially closed by a drum cover 7 which is conical at least in the area of the drum space 6 between the screw body 3 and the drum shell 1.
Die Funktion dieser Vollmantel- Schneckenzentrifuge ist wie folgt.The function of this solid bowl screw centrifuge is as follows.
Das Schleudergut S wird durch das zentral angeordnete sowie mitrotierende Einlaufrohr 12 über einen Verteiler 20 in den Trommelraum 6 mit der Schnecke 2 und dem die Schnecke 2 umgebenden Trommelmantel 1 geleitet. Durch Einwirkung der Schwerkraft setzen sich die Feststoffteilchen in kürzester Zeit an der innerenThe centrifuged material S is passed through the centrally arranged and rotating inlet pipe 12 via a distributor 20 into the drum space 6 with the screw 2 and the drum casing 1 surrounding the screw 2. Due to the action of gravity, the solid particles settle on the inner one in a very short time
Wandung des rotierenden Trommelmantels 1 ab. Der Verteiler 20 und das mitrotierende Einlaufrohr 12 bilden ein vorteilhaft hygienisches, weitgehend dichtes System.Wall of the rotating drum shell 1. The distributor 20 and the co-rotating inlet pipe 12 form an advantageously hygienic, largely sealed system.
Die Schnecke 2 rotiert mit einer etwas kleineren oder größeren Geschwindigkeit als die Trommel 1 und fördert den ausgeschleuderten Feststoff zum konischen Abschnitt hin aus der Trommel zum Feststof faustrag.The screw 2 rotates at a slightly lower or greater speed than the drum 1 and conveys the ejected solid to the conical section from the drum to the solid discharge.
Die Flüssigkeit strömt dagegen zum zylindrischen Abschnitt 5a am hinteren Ende der Trommel 1 und wird dort abgeleitet.In contrast, the liquid flows to the cylindrical section 5a at the rear end of the drum 1 and is discharged there.
Dabei ist in Fig. 1 folgende Konstruktion dem Flüssigkeitsablauf vorgeschaltet.The following construction is connected upstream of the liquid drain in FIG. 1.
Zwischen dem vom Trommeldeckel 7 aus betrachtet ersten Schneckengang x und dem Trommeldeckel 7 ist als Abschluß der Schnecke eine Art Scheibe 8 auf demBetween the first screw flight x viewed from the drum cover 7 and the drum cover 7 there is a kind of disk 8 on the end of the screw
Schneckenkörper angeordnet, welcher einen scheibenartigen inneren Abschnitt 8a und vorzugsweise einen stabilisierenden, konischen äußeren Abschnitt 8b aufweist, wobei die maximale radiale Erstreckung des Tellers 8 geringer ist als die radiale Erstreckung des Schneckenblattes 4. Am Innendurchmesser der Scheibe 8 ist wenigstens eine Öffnung für einen Flüssigkeitsdurchtritt ausgebildet, hier ein Ringspalt 21. Vorzugsweise sind die konischen Teller 11 im wesentlichen der Konizität des Trommeldeckels 7 entsprechend ausgebildet.Snail body arranged, which has a disc-like inner section 8a and preferably a stabilizing, conical outer section 8b, the maximum radial extent of the plate 8 is less than the radial Extension of the screw blade 4. At least one opening for a liquid passage is formed on the inside diameter of the disk 8, here an annular gap 21. Preferably, the conical plates 11 are essentially designed to correspond to the conicity of the drum cover 7.
Zwischen dem Teller 8 und dem Trommeldeckel 7 ist wiederum ein Tellerpaket 9 angeordnet, welches als vormontierbare Einheit ausgebildet und direkt an der Innenseite des Trommeldeckels 7 befestigt ist. Das Tellerpaket weist eine „verteilerartig geformte" Halterung 10 auf, welche einen inneren zylindrischen Abschnitt 10a und einen sich daran axial anschließenden konischen Abschnitt 10b umfaßt.Between the plate 8 and the drum cover 7, in turn, a plate pack 9 is arranged, which is designed as a preassembled unit and is attached directly to the inside of the drum cover 7. The plate pack has a “distributor-shaped” holder 10, which comprises an inner cylindrical section 10a and an axially adjoining conical section 10b.
Zwischen dem konischen Abschnitt 10b und dem Trommeldeckel 7 sind die eigentlichen konischen Teller 11 angeordnet, welche vorzugsweise mittels Abstandshaltern beabstandet sind, die dem jeweiligen Einsatzzweck angepaßt werden (angeformte Leisten, punktförmige Abstandshalter usw.).The actual conical plates 11 are arranged between the conical section 10b and the drum cover 7, which are preferably spaced apart by means of spacers which are adapted to the respective application (molded strips, punctiform spacers, etc.).
Im äußeren Bereich der Teller 1 sind Steigekanäle 13 ausgebildet, welche auch den konischen Abschnitt 10b durchsetzen. Alternativ kann das Tellerpaket 9 derart ausgebildet sein, daß die Zufuhr des zu klärenden Schleudergutes radial von außen erfolgt (hier nicht dargestellt).Rising channels 13 are formed in the outer area of the plates 1 and also pass through the conical section 10b. Alternatively, the plate pack 9 can be designed such that the centrifugal material to be clarified is supplied radially from the outside (not shown here).
Die Ableitung der Klarphase erfolgt durch eine Sammelleitung 14 am inneren Durchmesser der Teller 11 in der Wandung des zylindrischen Abschnittes 10b.The clear phase is derived through a manifold 14 on the inner diameter of the plate 11 in the wall of the cylindrical section 10b.
Die Sammelleitung 14 liegt vorzugsweise zumindest teilweise auf einem kleineren Durchmesser als die Außenwandung des Schneckenkörpers 3, was eine energiespa- rendere Betriebsweise bedingt als ein Anordnen der Sammelleitung auf einem größeren Durchmesser, die aber theoretisch auch denkbar ist. Die Sammelleitung 14 findet eine axiale Fortsetzung in einer Bohrung 15 des Trommeldeckels, welche in einem sich radial nach außen erstreckenden Ablauf 16 für die Klarphase mündet.The manifold 14 is preferably at least partially on a smaller diameter than the outer wall of the screw body 3, which requires a more energy-efficient operation than arranging the manifold on a larger diameter, which is also conceivable in theory. The manifold 14 is axially continued in a bore 15 of the drum cover, which opens into a radially outwardly extending outlet 16 for the clear phase.
Der Konzentratraum befindet sich hier außen am Tellerpakt 9, wobei der Durchmesser des Trommelmantels 1 durchgehend ausgeführt ist und keine Erweiterung umfaßt. Die Konzentratabfuhr erfolgt mittels der Schnecke 2, wobei die Schnecke zum Austrag des Feststoffes aus dem Konzentratraum einen Räumansatz 17 aufweist, welcher den Teller 8 durchtritt. Der Durchmesser des Trommelmantels 1 ist diesem Bereich im wesentlichen konstant ausgebildet.The concentrate chamber is located here on the outside of the plate pact 9, the diameter of the drum casing 1 being continuous and does not include any expansion. The concentrate is removed by means of the screw 2, the screw for discharging the solid from the concentrate space has a clearing attachment 17 which passes through the plate 8. The diameter of the drum casing 1 is essentially constant in this area.
Zur Einstellung des Spiegeldurchmessers in der Trommel können bekannte System wie z.B. das Varipondsystem der Anmelderin eingesetzt werden (Regulierscheibe 22, die axial vor Ablauf schiebbar ist DE 43 20 265). Auch andere Einstellmöglichkeiten des Spiegels wie eine dem Tellerpaket nachgeschaltete Schälscheibe sind vorstellbar.Known systems such as e.g. the Varipond system of the applicant can be used (regulating disk 22, which can be pushed axially before the end DE 43 20 265). Other options for adjusting the mirror, such as a peeling disc arranged downstream of the plate package, are also conceivable.
An der Halterung 10 und/oder am Trommeldeckel 7 sind femer in vorteilhafter Weise an der von den Tellern 9 abgewandten Seite die Einleitung des Schleudergutes in das Tellerpaket unterstützende Rippen 23 ausgebildet.On the holder 10 and / or on the drum cover 7, ribs 23 are also advantageously formed on the side facing away from the plates 9 to support the introduction of the centrifuged material into the plate pack.
Die Funktion dieser Anordnung ist wie folgt.The function of this arrangement is as follows.
Das den Ringspalt 21 durchtretende Schleudergut strömt an den Rippen 23 in die Steigekanäle 13 des Tellerpaketes 9, wo die Klarphase zur Sammelleitung und die Feststoffe nach außen abgeleitet werden. Die Feststoffe werden von dem Räuman- satz 17 mitgenommen und von der Schnecke zum konischen Abschnitt 5b gefördert.The centrifugal material passing through the annular gap 21 flows at the ribs 23 into the rising channels 13 of the plate pack 9, where the clear phase to the collecting line and the solids are discharged to the outside. The solids are carried along by the broach 17 and conveyed by the screw to the conical section 5b.
Durch eine Rückspülvorrichtung kann das System bzw. das Tellerpaket gereinigt werden. Bei Bedarf kann der Reinigungseffekt durch Entleerung über eine Düse im Ablauf 16 und ein Fliehkraftventil 19 unterstützt werden.The system or the plate pack can be cleaned by a backwashing device. If necessary, the cleaning effect can be supported by emptying via a nozzle in the outlet 16 and a centrifugal valve 19.
Bevorzugt ist der Abstand der Teller 11 des Tellerpaketes 9 größer als 0,5 mm und kleiner als 3 mm; gemessen senkrecht zur Oberfläche der Teller. Der Neigungswinkel der konischen Teller zur Trommellachse liegt vorzugsweise zwischen 35° und 55°, insbesondere bei 40° bis 50°. Besonders bevorzugt beträgt der Durchmesser der Teller 11 am äußeren Rand ca. 50 bis 75%, insbesondere 2/3 des Durchmessers des freien Schneckenbereiches oder des Trommelraumes. The distance between the plates 11 of the plate package 9 is preferably greater than 0.5 mm and less than 3 mm; measured perpendicular to the surface of the plate. The angle of inclination of the conical plates to the drum axis is preferably between 35 ° and 55 °, in particular 40 ° to 50 °. The diameter of the plates 11 on the outer edge is particularly preferably approximately 50 to 75%, in particular 2/3 of the diameter of the free screw region or the drum space.
Bezugszeichenreference numeral
Trommelmantel 1Drum casing 1
Schnecke 2Snail 2
Schneckenkörper 3Snail body 3
Schneckenblatt 4 zylindrischer Abschnitt 5a konischer Abschnitt 5bSnail blade 4 cylindrical section 5a conical section 5b
Trommelraum 6Drum space 6
Trommeldeckel 7Drum cover 7
Scheibe 8 innerer Abschnitt 8a konischer Abschnitt 8bDisc 8 inner section 8a conical section 8b
Tellerpaket 9Plate pack 9
Halterung 10 zylindrischer Abschnitt 10a konischer Abschnitt 10b konischen Teller 11Bracket 10 cylindrical section 10a conical section 10b conical plate 11
Einlaufrohr 12Inlet pipe 12
Steigekanäle 13Rise channels 13
Sammelleitung 14Manifold 14
Bohrung 15Hole 15
Ablauf 16Process 16
Räumansatz 17Clearance approach 17
Fliehkraftventil 19Centrifugal valve 19
Verteiler 20Distributor 20
Ringspalt 21Annular gap 21
Regulierscheibe 22Regulating disc 22
Rippen 23 Antrieb ARibs 23 Drive A
Maschinengestell M Machine frame M

Claims

Patentansprüche claims
1. Vollmantel-Schneckenzentrifuge, die folgendes aufweist: eine Schleudertrommel mit einem Trommelmantel (1) und einer Schnecke (2) mit einem Schneckenkörper (3), welcher von einem Schneckenblatt (4) umgeben ist, das mehrere Schneckengänge ausbildet, wobei zwischen den Schneckengängen eine Förderbahn zum Transport eines zu verarbeitenden Schleudergutes ausgebildet ist, einen Zulauf (12) für das Schleudergut in die Schleudertrommel, mindestens einen Feststoffaustrag und mindestens einen Flüssigkeitsablauf (16), wobei in der Schleudertrommel ein Tellerpaket (9) mit Tellern (11) an- geordnet ist, wobei der Trommelraum (6) axial von einem Trommeldeckel (7) verschlossen ist, dadurch gekennzeichnet, daß das Tellerpaket (11) in einem zylindrischen Abschnitt der Trommelrau- mes mit im wesentlichen konstanten Durchmesser angeordnet ist und das Tellerpaket (11) direkt dem Flüssigkeitsablauf (16) vorgeschaltet ist, wobei es am Trommeldeckel (7) anliegt und/oder an diesem angeordnet ist.1. Solid bowl screw centrifuge, which has the following: a centrifugal drum with a drum shell (1) and a screw (2) with a screw body (3), which is surrounded by a screw blade (4), which forms a plurality of screw flights, with between the screw flights a conveyor track is designed for transporting a centrifuged material to be processed, an inlet (12) for the centrifuged material into the centrifugal drum, at least one solids discharge and at least one liquid outlet (16), a plate pack (9) with plates (11) being arranged in the centrifugal drum is arranged, the drum space (6) being axially closed by a drum cover (7), characterized in that the plate pack (11) is arranged in a cylindrical section of the drum space with a substantially constant diameter and the plate pack (11) directly is connected upstream of the liquid drain (16), it abuts and / or is arranged on the drum cover (7).
2. Vollmantel-Schneckenzentrifuge nach Anspmch 1, dadurch gekennzeichnet, daß der Trommeldeckel (7) im wesentlichen konisch ausgebildet ist2. Solid bowl screw centrifuge according to Anspmch 1, characterized in that the drum cover (7) is substantially conical
3. Vollmantel-Schneckenzentrifuge nach Anspmch 1, dadurch gekennzeichnet, daß die konischen Teller (11) im wesentlichen der Konizität des Trommel- deckeis (7) entsprechend ausgebildet sind.3. Solid bowl screw centrifuge according to Anspmch 1, characterized in that the conical plates (11) are essentially designed according to the conicity of the drum cover (7).
4. Vollmantel-Schneckenzentrifuge nach Anspmch 1, 2 oder 3, dadurch gekennzeichnet, daß das Tellerpaket eine Sammelleitung (14) für die geklärte Flüssigkeitsphase aufweist, welche vorzugsweise zumindest teilweise oder ganz auf einem kleineren Durchmesser in der Schleudertrommel liegt als die Außenwandung des Schneckenkörpers (3).4. Solid bowl screw centrifuge according to Anspmch 1, 2 or 3, characterized in that the plate pack has a collecting line (14) for the clarified Has liquid phase, which is preferably at least partially or entirely on a smaller diameter in the centrifugal drum than the outer wall of the screw body (3).
5. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß zwischen dem vom Trommeldeckel (7) aus betrachtet ersten Schneckengang (x) und dem Trommeldeckel (7) als Abschluß der Schnecke eine Scheibe (8) vorgesehen ist, welche vorzugsweise einen scheibenartigen inneren Abschnitt (8 a) und einen konischen äußeren Abschnitt (8b) aufweist, wobei die maximale radiale Erstreckung der Scheibe (8) geringer ist als die radiale Erstreckung des Schneckenblattes (4).5. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that between the first from the drum cover (7) viewed from the first screw flight (x) and the drum cover (7) as a conclusion of the screw, a disc (8) is provided, which is preferably a disc-like inner portion (8 a) and a conical outer portion (8b), wherein the maximum radial extent of the disc (8) is less than the radial extent of the screw blade (4).
6. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß am Innendurchmesser der Scheibe (8) wenig- stens eine Öffnung (21), vorzugsweise ein Ringspalt, für einen Flüssigkeitsdurchtritt ausgebildet ist.6. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that on the inner diameter of the disc (8) at least one opening (21), preferably an annular gap, is formed for a liquid passage.
7. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß zwischen der Scheibe (8) und dem Trommel- deckel (7) das Tellerpaket (9) ausgebildet ist.7. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that between the disc (8) and the drum cover (7), the plate pack (9) is formed.
8. Vollmantel-Schneckenzentriflige nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Tellerpaket (9) eine Haltemng (10) aufweist, welche einen inneren zylindrischen Abschnitt (10a) und einen sich daran axial anschließenden konischen Abschnitt (10b) umfaßt, wobei zwischen dem konischen Abschnitt (10b) und dem Trommeldeckel (7) die konischen Teller (11) angeordnet sind.8. solid-shell screw centrifuge according to any one of the preceding claims, characterized in that the plate package (9) has a Haltemng (10) which comprises an inner cylindrical portion (10a) and an axially adjoining conical portion (10b), wherein between the conical section (10b) and the drum cover (7) the conical plates (11) are arranged.
9. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Tellerpaket (9) derart ausgebildet ist, daß die Zufuhr des zu klärenden Schleudergutes radial von außen erfolgt. 9. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that the plate package (9) is designed such that the supply of the centrifugal material to be clarified takes place radially from the outside.
10. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die im äußeren Bereich der Teller (11) Steigekanäle (13) ausgebildet sind, welche vorzugsweise auch den konischen Abschnitt (10b) der Haltemng (10) durchsetzen.10. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that in the outer region of the plate (11) riser channels (13) are formed, which preferably also pass through the conical section (10b) of the Haltemng (10).
11. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß mindestens der zwei Sammelleitungen im zylindrischen Abschnitt der Haltemng (10) ausgebildet sind.11. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that at least the two manifolds are formed in the cylindrical portion of the Haltemng (10).
12. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Sammelleitung (14) in den Ablauf (16) mündet, vorzugsweise über einer Bohrung (15) des Trommeldeckels (7).12. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that the collecting line (14) opens into the outlet (16), preferably via a bore (15) of the drum cover (7).
13. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Schnecke (2) zum Austrag des Feststoffes aus dem Konzentratraum einen Räumansatz (17) aufweist.13. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that the screw (2) has a clearing attachment (17) for discharging the solid from the concentrate space.
14. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Zulaufrohr (12) derart ausgebildet ist, daß es mit der Schnecke (2) mitrotiert.14. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that the inlet pipe (12) is designed such that it rotates with the screw (2).
15. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß an die Halterang (10) an der von den Tellern (11) abgewandten Seite oder an den Trommeldeckel (7) Rippen (23) zur Einleitung des Schleudergutes in das Tellerpaket (9) angesetzt sind.15. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that on the holding ring (10) on the side facing away from the plates (11) or on the drum cover (7) ribs (23) for introducing the centrifugal material into the plate pack ( 9) are scheduled.
16. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Abstand der Teller (11) des Tellerpaketes (9) zwischen 0,5 und 3 mm liegt, gemessen senkrecht zur Oberfläche der Teller.16. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that the distance between the plates (11) of the plate pack (9) is between 0.5 and 3 mm, measured perpendicular to the surface of the plates.
17. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Neigungswinkel der konischen Teller (11) zur Trommellachse zwischen 35° und 55°, insbesondere bei 40° bis 50°, liegt.17. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that the angle of inclination of the conical plate (11) to the drum axis between 35 ° and 55 °, in particular at 40 ° to 50 °.
18. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die radiale maximale Erstreckung der Teller18. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that the radial maximum extension of the plate
(11) zwischen 50 und 75% des freien Schneckenbereiches oder des Trommelraumes (6) beträgt.(11) is between 50 and 75% of the free screw area or the drum space (6).
19. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die radiale maximale Erstreckung der Teller19. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that the radial maximum extension of the plate
(11) bei 2/3 des freien Schneckenbereiches oder des Trommelraumes (6) liegt.(11) is 2/3 of the free screw area or the drum space (6).
20. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß zur Reinigung eine Rückspülvorrichtung und oder ein Fliehkraftventil (19) und/oder eine Düse (19) vorgesehen ist.20. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that a backwashing device and or a centrifugal valve (19) and / or a nozzle (19) is provided for cleaning.
21. Vollmantel-Schneckenzentrifuge nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß zur Regulierung des Flüssigkeitsspiegels eine Regulierscheibe (22) axial vor den Ablauf schiebbar ist. 21. Solid bowl screw centrifuge according to one of the preceding claims, characterized in that for regulating the liquid level, a regulating disc (22) can be pushed axially in front of the outlet.
EP01271978A 2000-12-27 2001-10-23 Solid-bowl screw centrifuge Expired - Lifetime EP1345700B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10065060 2000-12-27
DE10065060A DE10065060B4 (en) 2000-12-27 2000-12-27 Solid bowl screw centrifuge with plate insert
PCT/EP2001/012196 WO2002051550A1 (en) 2000-12-27 2001-10-23 Solid-bowl screw centrifuge

Publications (2)

Publication Number Publication Date
EP1345700A1 true EP1345700A1 (en) 2003-09-24
EP1345700B1 EP1345700B1 (en) 2005-02-16

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EP01271978A Expired - Lifetime EP1345700B1 (en) 2000-12-27 2001-10-23 Solid-bowl screw centrifuge

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US (1) US7083565B2 (en)
EP (1) EP1345700B1 (en)
JP (1) JP3990982B2 (en)
AT (1) ATE289221T1 (en)
AU (1) AU2002221724B2 (en)
BR (1) BR0116542B1 (en)
CA (1) CA2437502C (en)
DE (2) DE10065060B4 (en)
DK (1) DK1345700T3 (en)
PL (1) PL197427B1 (en)
WO (1) WO2002051550A1 (en)

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Also Published As

Publication number Publication date
US20060142137A1 (en) 2006-06-29
CA2437502A1 (en) 2002-07-04
CA2437502C (en) 2009-06-02
EP1345700B1 (en) 2005-02-16
DK1345700T3 (en) 2005-05-30
PL362216A1 (en) 2004-10-18
PL197427B1 (en) 2008-03-31
DE50105394D1 (en) 2005-03-24
DE10065060A1 (en) 2002-07-11
JP2004516139A (en) 2004-06-03
BR0116542B1 (en) 2009-12-01
US7083565B2 (en) 2006-08-01
JP3990982B2 (en) 2007-10-17
ATE289221T1 (en) 2005-03-15
WO2002051550A1 (en) 2002-07-04
DE10065060B4 (en) 2004-07-08
AU2002221724B2 (en) 2006-05-18
BR0116542A (en) 2003-10-07

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