EP1732697B1 - Solid-wall centrifuge comprising a weir provided with a stationary deflector plate - Google Patents

Solid-wall centrifuge comprising a weir provided with a stationary deflector plate Download PDF

Info

Publication number
EP1732697B1
EP1732697B1 EP05716484.0A EP05716484A EP1732697B1 EP 1732697 B1 EP1732697 B1 EP 1732697B1 EP 05716484 A EP05716484 A EP 05716484A EP 1732697 B1 EP1732697 B1 EP 1732697B1
Authority
EP
European Patent Office
Prior art keywords
solid
centrifuge according
bowl centrifuge
deflection disc
drum
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.)
Not-in-force
Application number
EP05716484.0A
Other languages
German (de)
French (fr)
Other versions
EP1732697B9 (en
EP1732697A1 (en
Inventor
Helmut Figgener
Markus Fleuter
Ulrich Horbach
Ludger HORSTKÖTTER
Martin Overberg
Stefan Terholsen
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
GEA Mechanical Equipment 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 GEA Mechanical Equipment GmbH filed Critical GEA Mechanical Equipment GmbH
Publication of EP1732697A1 publication Critical patent/EP1732697A1/en
Application granted granted Critical
Publication of EP1732697B1 publication Critical patent/EP1732697B1/en
Publication of EP1732697B9 publication Critical patent/EP1732697B9/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B04B2001/2083—Configuration of liquid outlets

Definitions

  • the invention relates to a solid bowl centrifuge according to the preamble of claim 1.
  • the annular gap creates a flow resistance which is greater, the smaller the axial distance between the weir and the throttle plate. As the flow resistance increases, however, a larger liquid pressure at the passage is required, which leads to an increase in the liquid level in the centrifugal drum. If the axial distance between the weir and the throttle plate is increased, falls the liquid level in the centrifugal drum to a value which is caused by the passage of the weir without such a throttle disk.
  • the DE PS 966,080 shows a Vollmantelschneckenzentrifuge, the liquid discharge from the drum is directed radially outward, where the liquid is collected in a kind of annulus with a nearly circular cross-section. Radial outward from the drum directed liquid discharges also shows the DE PS 706 968 ,
  • the DE 25 15 452 A1 also shows behind the axially directed liquid discharges a co-rotating with the drum plate, which deflects the exiting liquid almost 180 ° in the opposite axial direction.
  • the US 20 83 899 shows a centrifuge with vertical axis of rotation without throttle disc.
  • the FR 20 57 600 and the FR 20 54 722 show in each case solid bowl centrifuges with axially directed to the axis of rotation liquid discharge, where exiting liquid can splash back from a wall behind the outlets back to the drum.
  • the baffle is not a flat disc but a kind of "sleeve-like" component with an at least over part of the axial extension or the entire axial extension changing - here enlarging - inner diameter.
  • the deflection disc thus has a defined axial extension (in extension of the axis of rotation of the drum) and an inner and an outer sheath, wherein the distance of the inner shell to the axis of rotation is not constant but expands or increases.
  • an annular gap is formed between the passage and an orifice plate outside the centrifugal drum or between the passage and another component, which directs the liquid radially outward and preferably wholly or partially over its axial extent away from the expanding deflection disc is surrounded, so that the direct radial ejection of the liquid phase is prevented from this annular gap.
  • the deflection disk has an advantageous effect, because it prevents the exiting liquid from hitting the drum again.
  • the expanding baffle has an opening angle ⁇ to a perpendicular to the axis of rotation D of the drum or parallel to the drum cover extending plane which is greater than 0 ° and smaller than 90 °.
  • the expanding baffle on the inner shell at an angle 90 ° - ⁇ to the axis of rotation (D) of the drum, which is greater than 0 ° and less than 90 °.
  • the baffle preferably has such a shape and is arranged or integrated into the arrangement such that the liquid first emerges axially outwardly of the drum until it strikes a wall or disk from which it spouts substantially radially outward, wherein it impinges on the expanding baffle, which prevents the exiting liquid directly radially on wall (s) - in particular aligned parallel to the axis of rotation walls - the catching chamber, so that the noise is reduced compared to a configuration without a deflecting disc.
  • the liquid initially enters axially - i. parallel to the axis of rotation of the drum - outwardly of the drum until it hits a wall from which it is directed substantially radially outwards.
  • it meets the expanding baffle, which prevents the leaking fluid from getting back to the drum.
  • the expanding geometry of the baffle has several advantages. On the one hand, it makes it possible to significantly reduce the operating noise of the centrifuge, since the liquid is no longer injected directly from the annular gap, in particular between the throttle plate or other component and the drum lid against walls of the trap chamber but is deflected by an angle which the opening angle of the deflection disc equivalent. As a result, the liquid is no longer perpendicular to the housing walls of the catching chamber, what the noise significantly reduced. This is a great advantage in practice given the high RPM of eg 3500 RPM.
  • Another advantage is a reduction in power consumption due to the initially rapid discharge from the inner region, in particular away from the centrifugal drum surface.
  • the inner diameter of the baffle is larger than the outer diameter, on which the passage openings of the centrifugal drum are arranged.
  • the baffle connects axially directly to the passage openings, so that leakage of liquid between the drum cover and the baffle is prevented.
  • lugs or the like are provided at the passage openings - which axially overlap the deflection disk.
  • the deflection disk has an annular, conically widening shape.
  • the opening angle of the inner jacket of the deflection disk is preferably between 5 and 45 °, in particular 10 to 30 °. Especially by the latter angular range can be particularly advantageous results, in particular a particularly significant noise minimization achieve.

Landscapes

  • Centrifugal Separators (AREA)

Description

Die Erfindung betrifft eine Vollmantelzentrifuge nach dem Oberbegriff des Anspruchs 1.The invention relates to a solid bowl centrifuge according to the preamble of claim 1.

Vollmantelzentrifugen sind jeweils aus der EP 0 702 599 B1 und der US 5,593,377 bekannt. Diese beiden Schriften offenbaren eine Vollmantel-Schneckenzentrifuge mit einer Trommel, die ein Wehr aufweist, das mit einem Durchlass zum Ablassen einer in der Schleudertrommel abgetrennten Flüssigkeitsphase versehen ist, wobei dem Durchlass eine Drosselscheibe zugeordnet ist, die als nicht rotierendes Teil ausgebildet ist, deren Abstand zum Durchlass veränderlich ist, so dass eine Einstellung des Flüssigkeitsspiegels in der Schleudertrommel durch eine axiale Verstellung der Drosselscheibe möglich ist.Full-bowl centrifuges are each made of EP 0 702 599 B1 and the US 5,593,377 known. These two documents disclose a solid bowl screw centrifuge with a drum having a weir provided with a passage for discharging a liquid phase separated in the centrifugal drum, the passage being associated with a throttle disc formed as a non-rotating part whose distance is variable to the passage, so that an adjustment of the liquid level in the centrifugal drum by an axial adjustment of the throttle plate is possible.

Durch die stillstehende Drosselscheibe tritt keine nachteilige Beeinflussung der Arbeitsweise der Schleudertrommel auf, wobei insbesondere keine nachteilige Bremswirkung durch die den Ringspalt zwischen dem rotierenden Wehr und der stillstehenden Flüssigkeitsscheibe passierende Flüssigkeit gegeben ist.Due to the stationary throttle disk does not adversely affect the operation of the centrifugal drum, in particular, no adverse braking effect is given by the annular gap between the rotating weir and the stationary liquid disc passing liquid.

Der Ringspalt erzeugt einen Durchflusswiderstand der um so größer ist, je geringer der axiale Abstand zwischen dem Wehr und der Drosselscheibe ist. Mit zunehmendem Durchflusswiderstand wird aber ein größerer Flüssigkeitsdruck am Durchlass erforderlich, der zu einem Anstieg des Flüssigkeitsspiegels in der Schleudertrommel führt. Wird der axiale Abstand zwischen dem Wehr und der Drosselscheibe vergrößert, fällt der Flüssigkeitsspiegel in der Schleudertrommel bis auf einen Wert, der durch den Durchlass des Wehres ohne eine derartige Drosselscheibe bewirkt wird.The annular gap creates a flow resistance which is greater, the smaller the axial distance between the weir and the throttle plate. As the flow resistance increases, however, a larger liquid pressure at the passage is required, which leads to an increase in the liquid level in the centrifugal drum. If the axial distance between the weir and the throttle plate is increased, falls the liquid level in the centrifugal drum to a value which is caused by the passage of the weir without such a throttle disk.

Diese Lösung hat sich in der Praxis hervorragend bewährt, da sie durch die Ausgestaltung als im Betrieb nicht mit der Trommel rotierende, stillstehende Konstruktion ohne den Zwang zur Übertragung von Stellkräften auf mitrotierende Teile der Zentrifuge einfach und kostengünstig zu realisieren ist und dabei den Vorteil einer hervorragenden Möglichkeit zur Steuerung und/oder Regelung des Trenn- oder Klärvorganges in der Trommel bietet.This solution has proven excellent in practice, since it is simple and inexpensive to implement by the design as not in operation with the drum rotating, stationary construction without the need for the transfer of restoring forces on co-rotating parts of the centrifuge and the advantage of excellent Possibility to control and / or regulation of the separation or clarification process in the drum offers.

Die DE PS 966 080 zeigt eine Vollmantelschneckenzentrifuge, deren Flüssigkeitsaustrag aus der Trommel radial nach außen gerichtet ist, wo die Flüssigkeit in einer Art Ringraum mit einem nahezu kreisförmigen Querschnitt aufgefangen wird. Radial nach außen aus der Trommel gerichtete Flüssigkeitsausträge zeigt auch die DE PS 706 968 .The DE PS 966,080 shows a Vollmantelschneckenzentrifuge, the liquid discharge from the drum is directed radially outward, where the liquid is collected in a kind of annulus with a nearly circular cross-section. Radial outward from the drum directed liquid discharges also shows the DE PS 706 968 ,

Die DE 25 15 452 A1 zeigt ferner hinter den axial gerichteten Flüssigkeitsausträgen ein sich mit der Trommel mitdrehendes Blech, das die austretende Flüssigkeit quasi um 180° in die entgegengesetzte axiale Richtung umlenkt.The DE 25 15 452 A1 also shows behind the axially directed liquid discharges a co-rotating with the drum plate, which deflects the exiting liquid almost 180 ° in the opposite axial direction.

Die US 20 83 899 zeigt eine Zentrifuge mit vertikaler Drehachse ohne Drosselascheibe.The US 20 83 899 shows a centrifuge with vertical axis of rotation without throttle disc.

Die FR 20 57 600 und die FR 20 54 722 zeigen jeweils Vollmantel-Schneckenzentrifugen mit axial zur Drehachse gerichtetem Flüssigkeitsaustrag, wo austretende Flüssigkeit von einer Wandung hinter den Austritten wieder an die Trommel zurück spritzen kann.The FR 20 57 600 and the FR 20 54 722 show in each case solid bowl centrifuges with axially directed to the axis of rotation liquid discharge, where exiting liquid can splash back from a wall behind the outlets back to the drum.

Aus der gattungsgemäßen WO 01/85349 A1 ist es bekannt (Fig. 3), die axiale Verstellbarkeit einer nicht mitrotierenden Drosselscheibe, deren Funktionsprinzip dem der EP 0 702 599 B1 entspricht, hinter den Durchlassöffnungen der Trommel dadurch zu realisieren, dass die Drosselscheibe mittels eines Stelltriebes um ein Drehlager an ihrem Außenumfang klappenartig verschwenkbar ist. Mittels einer Ringnut - dort "Ringtasse" genannt, sollen die Strömungsverhältnisse am Durchlass optimiert werden. In Fig. 1 dieser Schrift ist auch eine Variante beschrieben, bei welcher eine Art zylindrischer Ring mit einer Wandung, die parallel zur Drehachse der Trommel ausgerichtet ist, im Ringspalt zwischen einer stillstehenden Gehäusewandung und dem Zentrifugendeckel angeordnet ist, wobei in diesem Ring verstellbare Lochblenden angeordnet sind, durch welche die abgeleitete Flüssigkeit direkt radial nach außen spritzt.From the generic WO 01/85349 A1 it is known ( Fig. 3 ), the axial adjustability of a non-co-rotating throttle plate, the principle of which the EP 0 702 599 B1 corresponds to realize behind the passage openings of the drum, characterized in that the throttle disc is pivotable by means of an actuating drive about a pivot bearing on its outer periphery like a flap. through an annular groove - there called "Ringtasse", the flow conditions at the passage are to be optimized. In Fig. 1 This document is also a variant described in which a kind of cylindrical ring with a wall which is aligned parallel to the axis of rotation of the drum is disposed in the annular gap between a stationary housing wall and the centrifuge lid, wherein in this ring adjustable perforated apertures are arranged, through which the discharged liquid is injected directly radially outward.

Gegenüber dem gattungsgemäßen Stand der Technik, ist es die Aufgabe der Erfindung, auf einfache Weise eine schonendere Ableitung der Flüssigkeitsphase aus dem Wehr zu realisieren.Compared to the generic prior art, it is the object of the invention to realize a gentler discharge of the liquid phase from the weir in a simple manner.

Die Erfindung löst diese Aufgabe durch den Gegenstand des Anspruches 1.The invention solves this problem by the subject matter of claim 1.

Danach ist vor dem Trommeldeckel außerhalb der Schleudertrommel - innerhalb der Fangkammer - eine im Betrieb stillstehende, d.h. nicht mit der Trommel rotierende - sich vom Trommeldeckel weg zumindest abschnittsweise aufweitende - Ablenkscheibe angeordnet, die wenigstens einen Innenmantel aufweist, wobei der Abstand des Innenmantels zur Drehachse nicht konstant ist sondern sich aufweitet bzw. vergrößert.Thereafter, in front of the drum lid outside the centrifugal drum - within the catching chamber - a resting during operation, i. not with the drum rotating - at least partially widening away from the drum cover - widening disc arranged which has at least one inner shell, wherein the distance of the inner shell to the axis of rotation is not constant but expands or increases.

Unter Aufweiten ist zu verstehen, dass es sich bei der Ablenkscheibe um keine ebene Scheibe handelt sondern um eine Art "hülsenartiges" Bauteil mit einem sich zumindest über einen Teil der axialen Erstreckung oder die gesamte axiale Erstreckung verändernden - hier vergrößernden - inneren Durchmesser. Die Ablenkscheibe hat somit eine definierte axiale Erstreckung (in Verlängerung der Drehachse der Trommel) sowie einen Innen- und einen Außenmantel, wobei der Abstand des Innenmantels zur Drehachse nicht konstant ist sondern sich aufweitet bzw. vergrößert.By widening is to be understood that the baffle is not a flat disc but a kind of "sleeve-like" component with an at least over part of the axial extension or the entire axial extension changing - here enlarging - inner diameter. The deflection disc thus has a defined axial extension (in extension of the axis of rotation of the drum) and an inner and an outer sheath, wherein the distance of the inner shell to the axis of rotation is not constant but expands or increases.

Dabei ist zwischen dem Durchlass und einer Drosselscheibe außerhalb der Schleudertrommel oder zwischen dem Durchlass und einem sonstigen Bauteil ein Ringspalt ausgebildet, der die Flüssigkeit radial nach außen leitet und der vorzugsweise ganz oder teilweise über seine axiale Erstreckung hinweg von der sich aufweitenden Ablenkscheibe umgeben ist, so dass das direkte radiale Ausspritzen der Flüssigkeitsphase aus diesem Ringspalt verhindert wird. Gerade hier wirkt sich die Ablenkscheibe vorteilhaft aus, da sie verhindert, dass die austretende Flüssigkeit wieder an die Trommel trifft.In this case, an annular gap is formed between the passage and an orifice plate outside the centrifugal drum or between the passage and another component, which directs the liquid radially outward and preferably wholly or partially over its axial extent away from the expanding deflection disc is surrounded, so that the direct radial ejection of the liquid phase is prevented from this annular gap. Especially here, the deflection disk has an advantageous effect, because it prevents the exiting liquid from hitting the drum again.

Vorzugsweise weist die sich aufweitende Ablenkscheibe einen Öffnungswinkel γ zu einer senkrecht zur Drehachse D der Trommel bzw. parallel zum Trommeldeckel verlaufenden Ebene auf, der größer als 0° und kleiner als 90° ist. Damit weist die sich aufweitende Ablenkscheibe am Innenmantel einen Winkel 90° - γ zur Drehachse (D) der Trommel auf, der größer als 0° und kleiner als 90° ist.Preferably, the expanding baffle has an opening angle γ to a perpendicular to the axis of rotation D of the drum or parallel to the drum cover extending plane which is greater than 0 ° and smaller than 90 °. Thus, the expanding baffle on the inner shell at an angle 90 ° - γ to the axis of rotation (D) of the drum, which is greater than 0 ° and less than 90 °.

Die Ablenkscheibe weist vorzugsweise eine derartige Form auf und ist derart angeordnet bzw. in die Anordnung integriert, dass die Flüssigkeit zunächst axial nach außen aus der Trommel tritt, bis sie auf eine Wand oder Scheibe auftrifft, von der sie im wesentlichen radial nach außen spritzt, wobei sie auf die sich aufweitende Ablenkscheibe auftrifft, die verhindert, dass die austretende Flüssigkeit direkt radial auf Wandung(en) - insbesondere parallel zur Drehachse ausgerichtete Wandungen - der Fangkammer trifft, so dass sich die Geräuschentwicklung gegenüber einer Anordnung ohne Ablenkscheibe verringert.The baffle preferably has such a shape and is arranged or integrated into the arrangement such that the liquid first emerges axially outwardly of the drum until it strikes a wall or disk from which it spouts substantially radially outward, wherein it impinges on the expanding baffle, which prevents the exiting liquid directly radially on wall (s) - in particular aligned parallel to the axis of rotation walls - the catching chamber, so that the noise is reduced compared to a configuration without a deflecting disc.

Die Flüssigkeit tritt zunächst axial - d.h. parallel zur Drehachse der Trommel - nach außen aus der Trommel, bis sie auf eine Wand trifft, von der sie im wesentlichen radial nach außen gelenkt wird. Hier trifft sie auf die sich aufweitende Ablenkscheibe, die verhindert, dass die austretende Flüssigkeit wieder an die Trommel gelangt.The liquid initially enters axially - i. parallel to the axis of rotation of the drum - outwardly of the drum until it hits a wall from which it is directed substantially radially outwards. Here it meets the expanding baffle, which prevents the leaking fluid from getting back to the drum.

Die sich aufweitende Geometrie der Ablenkscheibe hat mehrere Vorteile. Einerseits ermöglicht sie es, das Betriebsgeräusch der Zentrifuge deutlich zu verringern, da die Flüssigkeit nicht mehr direkt aus dem Ringspalt insbesondere zwischen der Drosselscheibe oder einem sonstigen Bauelement und dem Trommeldeckel gegen Wandungen der Fangkammer spritzt sondern um einen Winkel abgelenkt wird, der dem Öffnungswinkel der Ablenkscheibe entspricht. Hierdurch trifft die Flüssigkeit nicht mehr senkrecht auf die Gehäusewandungen der Fangkammer, was die Geräuschentwicklung deutlich verringert. Dies ist in der Praxis angesichts der bei hohen Umdrehungszahlen von z.B. 3500 U/min ein großer Vorteil.The expanding geometry of the baffle has several advantages. On the one hand, it makes it possible to significantly reduce the operating noise of the centrifuge, since the liquid is no longer injected directly from the annular gap, in particular between the throttle plate or other component and the drum lid against walls of the trap chamber but is deflected by an angle which the opening angle of the deflection disc equivalent. As a result, the liquid is no longer perpendicular to the housing walls of the catching chamber, what the noise significantly reduced. This is a great advantage in practice given the high RPM of eg 3500 RPM.

Durch das "sanftere" Auftreffen eines Flüssigkeitsstrahles auf die Wandungen der Fangkammer wird zudem bei zu Schäumung neigenden Produkten die Schaumbildung verringert.Due to the "gentler" impingement of a jet of liquid on the walls of the catching chamber foaming is also reduced in prone to foaming products.

Ein weiterer Vorteil liegt in einer Reduzierung der Leistungsaufnahme durch das zunächst rasche Ableiten aus dem inneren Bereich, insbesondere von der Schleudertrommeloberfläche weg.Another advantage is a reduction in power consumption due to the initially rapid discharge from the inner region, in particular away from the centrifugal drum surface.

Vorzugsweise ist der innere Durchmesser der Ablenkscheibe größer als der äußere Durchmesser, auf dem die Durchlassöffnungen der Schleudertrommel angeordnet sind.Preferably, the inner diameter of the baffle is larger than the outer diameter, on which the passage openings of the centrifugal drum are arranged.

Bevorzugt schließt sich die Ablenkscheibe axial unmittelbar an die Durchlassöffnungen an, damit ein Austritt von Flüssigkeit zwischen dem Trommeldeckel und der Ablenkscheibe verhindert wird. Bei einer weiteren vorteilhaften Variante sind an den Durchlassöffnungen Ansätze vorgesehen - Hülsen oder dgl. -, welche die Ablenkscheibe axial überlappen.Preferably, the baffle connects axially directly to the passage openings, so that leakage of liquid between the drum cover and the baffle is prevented. In a further advantageous variant, lugs or the like are provided at the passage openings - which axially overlap the deflection disk.

Sämtliche übrigen eingangs beschriebenen Vorteile des gattungsgemäßen Standes der Technik bleiben ansonsten erhalten.All other advantages of the generic state of the art described at the outset are otherwise retained.

Besonders weist die Ablenkscheibe dabei eine ringartige, sich kegelig aufweitende Form auf.In particular, the deflection disk has an annular, conically widening shape.

Vorzugsweise beträgt der Öffnungswinkel des Innenmantels der Ablenkscheibe zwischen 5 und 45°, insbesondere 10 bis 30°. Gerade durch den letztgenannten Winkelbereich lassen sich besonders vorteilhafte Ergebnisse, insbesondere eine besonders deutliche Geräuschminimierung, erzielen. Bezugszeichen Schleudertrommel 1 Schnecke 2 Trommeldeckel 3 Wehr 4 Durchlaßöffnung 5 Drosselscheibe 6 Innenmantel 7 Ringspalt 8, 8' Wandungen 9, 10 Fangkammer 11 Ablenkscheibe 12 Wehr 13 Ringscheibe 14 Bolzen 15, 16 Ring 17 Getriebegehäuse 18 Ansatz 19 The opening angle of the inner jacket of the deflection disk is preferably between 5 and 45 °, in particular 10 to 30 °. Especially by the latter angular range can be particularly advantageous results, in particular a particularly significant noise minimization achieve. <U> reference numerals </ u> centrifugal drum 1 slug 2 drum lid 3 weir 4 passage opening 5 throttle disc 6 inner sheath 7 annular gap 8, 8 ' walls 9, 10 trap chamber 11 deflector 12 weir 13 washer 14 bolt 15, 16 ring 17 gearbox 18 approach 19

Claims (19)

  1. Solid-bowl centrifuge, in particular a solid-bowl screw-type centrifuge, comprising
    a) a centrifugal drum (1) rotatable about a horizontal axis of rotation,
    b) which centrifugal drum has a weir for discharging a liquid from the centrifugal drum (1),
    c) which weir has a passage with at least one or more passage openings (5) in an axial end region or drum cover (3),
    characterized in that
    d) there is arranged in front of the drum cover (3) and outside of the centrifugal drum (1) a deflection disc (12) which is stationary during operation, widens at least in certain portions away from the drum cover (3) and has an inner jacket whose distance from the axis of rotation is not constant but widens or increases, wherein
    e) an annular gap (8, 8') is formed between the passage (4) and a throttle disc (6) outside of the centrifugal drum or between the passage (4) and another component and is preferably completely or partially surrounded over its axial extent by the widening deflection disc (12).
  2. Solid-bowl centrifuge according to Claim 1, characterized in that the widening deflection disc (12) has at the inner jacket (7) an opening angle γ with respect to a plane (c) extending perpendicularly to the axis of rotation (D) of the drum or parallel to the drum cover (3), which opening angle is greater than 0° and less than 90°.
  3. Solid-bowl centrifuge according to either of the preceding claims, characterized in that the deflection disc has an annular, conically widening shape.
  4. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the liquid first passes axially outwardly from the drum until it strikes a wall or disc from which it sprays substantially radially outwardly and strikes the widening deflection disc, which prevents the exiting liquid from directly radially striking the wall(s) (9) of the collection chamber, with the result that the generation of noise is reduced.
  5. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the widening deflection disc (12) has at the inner jacket (7) an angle 90°-γ to the axis of rotation (D) of the drum which is greater than 0° and less than 90°.
  6. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the inner smallest diameter of the deflection disc (12) is greater than the outer diameter on which the passage openings (5) are arranged.
  7. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the deflection disc axially directly adjoins the passage openings (5).
  8. Solid-bowl centrifuge according to one of the preceding claims, characterized in that a projection (19) which protrudes axially from the drum cover and which is overlapped axially by the deflection disc (12) is formed on the passage openings (5).
  9. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the opening angle (γ) of the deflection disc (12) is between 5 and 45°.
  10. Solid-bowl centrifuge according to Claim 9, characterized in that the opening angle (γ) of the deflection disc (12) is between 10 and 30°.
  11. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the opening angle (γ) of the deflection disc (12) is constant.
  12. Solid-bowl centrifuge according to one of the preceding Claims 1 to 10, characterized in that the opening angle (γ) of the deflection disc (12) varies over its axial extent and/or in the circumferential direction.
  13. Solid-bowl centrifuge according to Claim 11, characterized in that the opening angle (γ) of the deflection disc (12) varies continuously or abruptly, in particular increases, over the axial extent of the deflection disc (12).
  14. Solid-bowl centrifuge according to one of the preceding claims, characterized by a multi-part, in particular two-part, configuration of the deflection disc (12).
  15. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the distance between the passage (4) and the throttle disc (6) is variable.
  16. Solid-bowl centrifuge according to one of the preceding claims, characterized by a configuration as a solid-bowl screw-type centrifuge having a rotatable screw (2) arranged in the centrifugal drum (1).
  17. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the deflection disc (12) is fastened to a surrounding wall (9, 10) via bolts (15 or 16) in an axial orientation.
  18. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the deflection disc (12) is fastened to a surrounding wall (9, 10) via bolts (15 or 16) in a radial orientation.
  19. Solid-bowl centrifuge according to one of the preceding claims, characterized in that the deflection disc (12) is fastened to a surrounding wall (9, 10) via a ring (17).
EP05716484.0A 2004-04-06 2005-03-31 Solid-wall centrifuge comprising a weir provided with a stationary deflector plate Not-in-force EP1732697B9 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202004005353U DE202004005353U1 (en) 2004-04-06 2004-04-06 Solid bowl centrifuge with a weir with a throttle disc
PCT/EP2005/003399 WO2005097336A1 (en) 2004-04-06 2005-03-31 Solid-wall centrifuge comprising a weir provided with a stationary deflector plate

Publications (3)

Publication Number Publication Date
EP1732697A1 EP1732697A1 (en) 2006-12-20
EP1732697B1 true EP1732697B1 (en) 2016-05-04
EP1732697B9 EP1732697B9 (en) 2016-10-19

Family

ID=34877804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05716484.0A Not-in-force EP1732697B9 (en) 2004-04-06 2005-03-31 Solid-wall centrifuge comprising a weir provided with a stationary deflector plate

Country Status (6)

Country Link
US (1) US7753834B2 (en)
EP (1) EP1732697B9 (en)
CN (1) CN1938099B (en)
DE (1) DE202004005353U1 (en)
DK (1) DK1732697T3 (en)
WO (1) WO2005097336A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10203652B4 (en) * 2002-01-30 2006-10-19 Westfalia Separator Ag Solid bowl centrifuge with a weir
DE202004005353U1 (en) * 2004-04-06 2005-08-18 Westfalia Separator Ag Solid bowl centrifuge with a weir with a throttle disc
DK176946B1 (en) * 2007-05-09 2010-06-14 Alfa Laval Corp Ab Centrifugal separator and a liquid phase drain port element
DK200801848A (en) 2008-12-30 2010-07-01 Alfa Laval Corp Ab A decanter centrifuge and a decanter centrifuge discharge port memeber.
US9321058B2 (en) * 2010-07-01 2016-04-26 Centrisys Corp. Centrifugal liquid separation machine to efficiently flow multi-phase solids from a heavy phase discharge stream with a solids plow
DK178254B1 (en) * 2010-11-12 2015-10-12 Alfa Laval Corp Ab Centrifugal separator, abrasion resistant element and set of abrasion resistant elements for a centrifugal separator
US8956272B2 (en) * 2011-12-30 2015-02-17 Vanderbeken Ent. Ltd Method and apparatus for removal of tars or resins from a scrubber liquid using a centrifuge with a discharge chamber scraper
DE102012106226A1 (en) * 2012-07-11 2014-01-16 Gea Mechanical Equipment Gmbh Solid bowl centrifuge with overflow weir
DE102019135215A1 (en) * 2019-12-19 2021-06-24 Flottweg Se Cross disk of a centrifuge screw and solid bowl screw centrifuge

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2083899A (en) * 1932-11-30 1937-06-15 Centrifuge Company Apparatus for centrifugal separation
DE706968C (en) * 1936-06-23 1941-06-10 Gutehoffnungshuette Oberhausen Slingshot for liquids with muddy to fine-grained components
DE966080C (en) * 1941-08-14 1957-07-04 Starcosa Maschinen Und Appbau Centrifugal separator
NL157912B (en) 1941-08-14 Schering Ag
FR2054722A5 (en) * 1969-07-24 1971-05-07 Saget Pierre Centrifuge sepg two liquids and a solid
FR2057600A5 (en) * 1969-08-29 1971-05-21 Saget Pierre Centrifuge with modified solids discharge - conveyor
FR2120537A5 (en) * 1971-01-07 1972-08-18 Saget Pierre Continuous centrifugal separator - for liquids of similar density applicable with sediment present
DE2515452A1 (en) * 1975-04-09 1976-10-21 Mono Pumps Ltd Centrifuge - auger has flights to separate solid and liquid material
DE2901607C2 (en) * 1979-01-17 1981-03-12 Westfalia Separator Ag, 4740 Oelde Solid bowl screw centrifuge
SE459234B (en) * 1987-10-15 1989-06-19 Alfa Laval Marine Power Eng SEAT AND EQUIPMENT MAKES INTERIOR DISCOVERY OF A Centrifuge Rotor
CN2157195Y (en) * 1992-10-23 1994-02-23 农业部种子项目办公室 Centrifugal for removing linters of cotton seeds with diluted sulfuric acid
DE4320265C2 (en) * 1993-06-18 1995-08-03 Westfalia Separator Ag Weir for solid jacket centrifugal drums
JP3543597B2 (en) * 1997-12-22 2004-07-14 株式会社クボタ Separation water discharge device in horizontal centrifuge
JPH11197547A (en) * 1998-01-13 1999-07-27 Kubota Corp Device of discharging separated water in a horizontal type centrifugal separator
DE19948115A1 (en) * 1999-10-06 2001-04-12 Baker Hughes De Gmbh Centrifuge for separating solid-liquid mixtures
DE10021983A1 (en) 2000-05-05 2001-11-08 Baker Hughes De Gmbh Solid bowl centrifuge has an adjustable weir consisting of an annular plate connected to the centrifuge housing and fixed to cover the liquid openings of the centrifuge drum from the outside
DE202004005353U1 (en) * 2004-04-06 2005-08-18 Westfalia Separator Ag Solid bowl centrifuge with a weir with a throttle disc

Also Published As

Publication number Publication date
CN1938099A (en) 2007-03-28
DK1732697T3 (en) 2016-08-22
EP1732697B9 (en) 2016-10-19
DE202004005353U1 (en) 2005-08-18
CN1938099B (en) 2010-07-07
EP1732697A1 (en) 2006-12-20
US7753834B2 (en) 2010-07-13
US20080248940A1 (en) 2008-10-09
WO2005097336A1 (en) 2005-10-20

Similar Documents

Publication Publication Date Title
EP1732697B1 (en) Solid-wall centrifuge comprising a weir provided with a stationary deflector plate
EP1943022B1 (en) Stirrer mill
DE69712497T2 (en) SEPARATION CENTRIFUGE
EP2872256B1 (en) Solid-bowl screw centrifuge with overflow weir
WO2003064054A1 (en) Full-jacket helix centrifuge with a weir
EP0231722B1 (en) Continuously operating sugar centrifuge
EP1572371B2 (en) Centrifuge, particularly a separator, having solids discharge nozzles and wear protection
WO2005016544A1 (en) Solid bowl screw centrifuge comprising a scraping blade
EP1509329B1 (en) Solid bowl screw centrifuge comprising a peeling disk, and method for the operation thereof
EP1998896B1 (en) Fully jacketed screw centrifuge with efflux orifices for partial and residual emptying of the drum
EP1949966B1 (en) Solid wall helical centrifuge with pressure plate
WO2002040175A1 (en) Solid bowl screw centrifuge comprising a distributor
EP0692311B1 (en) Continuously operating centrifugal strainer for sugar massecuites
EP2392405A2 (en) Separator
EP2326427B1 (en) Centrifuge having a selfdischarging bowl
EP2026909B1 (en) Centrifuge, in particular separator, having a feed line for control fluid
DE2631178C3 (en) Continuously working sieve centrifuge, especially sugar centrifuge
DE371191C (en) Homogenization process
EP3628406A1 (en) Centrifuge with a washing device
DE1632266C (en) Solid bowl centrifuge
EP0766988A1 (en) Separating device for separating liquid from a gas-liquid mixture
EP3867501A1 (en) Turbocharger having improved shaft seal
DE202007004623U1 (en) Centrifuge with a paring disc as liquid outlet
DE1632266B2 (en) FULL SHELL CENTRIFUGE

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: 20060901

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE DK FR GB IT

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE DK FR GB IT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: WESTFALIA SEPARATOR GMBH

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GEA WESTFALIA SEPARATOR GMBH

17Q First examination report despatched

Effective date: 20090803

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GEA MECHANICAL EQUIPMENT GMBH

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20151124

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE DK FR GB IT

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: DE

Ref legal event code: R096

Ref document number: 502005015211

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

Effective date: 20160818

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502005015211

Country of ref document: DE

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: 20170207

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502005015211

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20170331

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

Effective date: 20170331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20171130

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

Ref country code: DE

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

Effective date: 20171003

Ref country code: FR

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

Effective date: 20170331

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: 20170331

Ref country code: IT

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

Effective date: 20170331

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

Ref country code: DK

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

Effective date: 20170331