EP0221246A2 - Separator - Google Patents

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Publication number
EP0221246A2
EP0221246A2 EP86110245A EP86110245A EP0221246A2 EP 0221246 A2 EP0221246 A2 EP 0221246A2 EP 86110245 A EP86110245 A EP 86110245A EP 86110245 A EP86110245 A EP 86110245A EP 0221246 A2 EP0221246 A2 EP 0221246A2
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EP
European Patent Office
Prior art keywords
guide elements
rotor
guide
openings
sifter according
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
EP86110245A
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German (de)
French (fr)
Other versions
EP0221246B1 (en
EP0221246A3 (en
Inventor
Ludger Lohnherr
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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Publication date
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Publication of EP0221246A2 publication Critical patent/EP0221246A2/en
Publication of EP0221246A3 publication Critical patent/EP0221246A3/en
Application granted granted Critical
Publication of EP0221246B1 publication Critical patent/EP0221246B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/06—Feeding or discharging arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B07B4/025—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall the material being slingered or fled out horizontally before falling, e.g. by dispersing elements

Definitions

  • the invention relates to a classifier according to the preamble of claim 1.
  • a classifier of the type required in the preamble of claim 1 is known for example from EP-A-23 320.
  • the upper end face of the rotor is provided with an annular spreading plate, which encloses a central opening serving to extract the air stream laden with fine material.
  • the visible material is fed to this spreading plate through a number of good pipes, which are arranged on the top of the classifier housing around the central connecting piece which serves to discharge the visual air. From the edge of the spreader plate, the material is deflected radially outward in the downward direction so that it falls into the space between the stationary diffuser and the rotor.
  • a major disadvantage of this known classifier is the poor distribution of the crop by the spreading disc. If the material to be sighted is not scattered completely uniformly over the entire circumference, this affects the selectivity of the classifier.
  • the invention is therefore based on the object of forming a classifier of the type required in the preamble of claim 1 so that at a simple construction, an absolutely even distribution of the visible material is achieved over the entire circumference of the visible space.
  • the inventive design of the spreading plate achieves a completely uniform spreading of the material to be sifted into the viewing area.
  • the material flowing outwards on the spreader plate is fed through the guide elements in a completely jam-free manner and deflected via the guide elements in such a way that it is directed downward into the viewing area without any disruptive material agglomeration through the openings.
  • the arrangement of the guide elements and guide elements according to the invention ensures that the material on the spreading plate cannot build up and remain under the action of the centrifugal force, which would result in imbalances in the operation of the spreading plate and irregularities in the dropping off of the material.
  • the classifier illustrated in FIG. 1 contains a rotor 1 with a vertical axis 2, which is driven via a shaft 3 by a motor not shown in the drawing.
  • the shaft 3 is supported at its lower end in a bearing 4 which is held in the classifier housing 6 via radial struts 5.
  • the rotor 1 has on its circumference spaced-apart blades 7 which are expediently adjustable.
  • annular scattering plate 8 On the upper side of the rotor 1 there is an annular scattering plate 8 which can be rotated with the rotor, the configuration of which is explained in detail with reference to FIG.
  • Two diametrically arranged material insertion nozzles 9, 10 serve to feed the material to be sifted onto the spreading plate 8.
  • the rotor 1 is surrounded at a distance (distance dimension x) by a fixed guide device 11, which contains adjustable guide vanes 12 and serves to supply a stream of classifying air (arrows 13) which flows from the lower part of the classifier housing 6, the guide device 11 and the rotor 1 flows through and flows through a channel 14 arranged centrally above the rotor 1.
  • the guide vanes 12 of the guide apparatus 11 are mounted eccentrically (axis 15), so that the distance x between the guide vanes 12 and the circumference of the rotor 1 remains constant when the guide vane position changes.
  • a funnel 16 for discharging the coarse material (arrow 17) is provided below the rotor 1 and the guide apparatus 11.
  • the fine material (arrow 18) leaves the classifier together with the classifying air through channel 14 and is separated, for example, in a cyclone arranged outside the classifier.
  • the spreading plate 8 is provided in its peripheral region with a number of openings 19, which are arranged in a uniform circumferential division and in the embodiment according to FIG. 2 have the shape of elongated holes, the axis 20 of which includes an angle ⁇ 1 with the radial direction.
  • the openings 19 are delimited by guide elements 21 which are inclined in the direction of rotation of the spreading plate (arrow 22) by the angle ⁇ 1 already mentioned with respect to the radial direction.
  • a guide element 23 is arranged in each case, which is inclined in the opposite direction to the direction of rotation of the spreading plate 8 with respect to the radial direction by an angle ⁇ 2.
  • the guide elements 21 and the guide elements 23 are thus arranged in a zigzag shape, the openings 19 extending into the gusset of the adjacent guide and guide elements 21, 23.
  • the guide elements 21 are inclined with respect to the vertical position and cover the openings 19 at a distance.
  • the material (arrow 24) supplied to the openings 19 along the guide elements 23 is guided by the guide elements 21 deflected downwards (arrow 25) and falls through the openings 19 into the viewing space.
  • the angle ⁇ 1 which the guide elements 21 form with the radial direction, is advantageously between 34 and 54 °, preferably about 45 °.
  • the angle ⁇ 2 which the guide elements 23 form with the radial direction, is expediently between 25 and 45 °, preferably about 36 °.
  • the openings 19 are arranged on a diameter which corresponds approximately to the average diameter of the fixed diffuser 11. In this way, in contrast to the previously known designs, the material is not sprinkled into the space between the guide device 11 and the rotor 1, but rather into the guide device itself. As a result, coarse particles of good are separated off on the walls of the guide vanes 12 and fall directly down into the funnel 16 without stressing the part of the viewing space located between the guide device 11 and the rotor 1.
  • the openings 19 are designed trapezoidal, the trapezoidal base being delimited by the guide elements 21.

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  • Combined Means For Separation Of Solids (AREA)

Abstract

Die Erfindung betrifft einen Sichter, dessen Streuteller (8) Durchbrüche (19) sowie gegenüber der radialen Richtung geneigte Führungselemente (21) und Leitelemente (23) aufweist. Ein derartiger Streu­teller ermöglicht es, das Sichtgut sehr gleich­mäßig in den Sichtraum einzustreuen. The invention relates to a classifier, the scatter plate (8) of which has openings (19) and guide elements (21) and guide elements (23) inclined with respect to the radial direction. Such a spreading plate makes it possible to sprinkle the visible material very evenly into the viewing space.

Description

Die Erfindung betrifft einen Sichter entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a classifier according to the preamble of claim 1.

Ein Sichter der im Oberbegriff des Anspruches 1 vorausgesetzten Art ist beispielsweise durch die EP-A- 23 320 bekannt. Der Rotor ist hierbei an seiner oberen Stirnseite mit einem ringförmigen Streuteller versehen, der eine zum Abzug des mit Feingut beladenen Luftstromes dienende zentrale Öffnung umschließt. Diesem Streuteller wird das Sichtgut durch eine Anzahl von Gutrohren zuge­führt, die an der Oberseite des Sichtergehäuses um den zur Abführung der Sichtluft dienenden zentralen Stutzen herum angeordnet sind. Vom Rand des Streutellers wird das Gut radial nach außen ringförmiges Ablenkorgan so nach unten umgelenkt, daß es in den Raum zwischen dem ortsfesten Leit­apparat und dem Rotor fällt.A classifier of the type required in the preamble of claim 1 is known for example from EP-A-23 320. The upper end face of the rotor is provided with an annular spreading plate, which encloses a central opening serving to extract the air stream laden with fine material. The visible material is fed to this spreading plate through a number of good pipes, which are arranged on the top of the classifier housing around the central connecting piece which serves to discharge the visual air. From the edge of the spreader plate, the material is deflected radially outward in the downward direction so that it falls into the space between the stationary diffuser and the rotor.

Ein wesentlicher Nachteil dieses bekannten Sich­ters liegt in der schlechten Gutverteilung durch den Streuteller. Erfolgt die Einstreuung des Sichtgutes in den Sichtraum nicht völlig gleich­mäßig über den gesamten Umfang, so beeinträchtigt dies die Trennschärfe des Sichters.A major disadvantage of this known classifier is the poor distribution of the crop by the spreading disc. If the material to be sighted is not scattered completely uniformly over the entire circumference, this affects the selectivity of the classifier.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Sichter der im Oberbegriff des Anspruches 1 vorausgesetzten Art so auszubilden, daß bei ein­ facher konstruktiver Bauweise eine absolut gleich­mäßige Verteilung des Sichtgutes über den ganzen Umfang des Sichtraumes erreicht wird.The invention is therefore based on the object of forming a classifier of the type required in the preamble of claim 1 so that at a simple construction, an absolutely even distribution of the visible material is achieved over the entire circumference of the visible space.

Diese Aufgabe wird erfindungsgemäß durch die kenn­zeichnenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.

Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Appropriate embodiments of the invention are the subject of the dependent claims.

Bei den der Erfindung zugrundeliegenden Versuchen hat sich überraschend gezeigt, daß durch die er­findungsgemäße Gestaltung des Streutellers ein völlig gleichmäßiges Einstreuen des zu sichten­den Gutes in den Sichtraum erreicht wird. Das auf dem Streuteller nach außen fließende Gut wird durch die Leitelemente völlig staufrei den Durch­brüchen zugeführt und über die Führungselemente so umgelenkt, daß es ohne störende Materialzu­sammenballungen durch die Durchbrüche nach unten in den Sichtraum gelenkt wird. Die erfindungsge­mäße Anordnung der Leitelemente und Führungsele­mente gewährleistet dabei, daß sich das auf dem Streuteller befindliche Gut auch unter der Wirkung der Zentrifugalkraft nicht aufstauen und liegen­bleiben kann, was Unwuchten im Betrieb des Streu­tellers und Ungleichmäßigkeiten im Gutabwurf zur Folge hätte.In the experiments on which the invention is based, it has surprisingly been found that the inventive design of the spreading plate achieves a completely uniform spreading of the material to be sifted into the viewing area. The material flowing outwards on the spreader plate is fed through the guide elements in a completely jam-free manner and deflected via the guide elements in such a way that it is directed downward into the viewing area without any disruptive material agglomeration through the openings. The arrangement of the guide elements and guide elements according to the invention ensures that the material on the spreading plate cannot build up and remain under the action of the centrifugal force, which would result in imbalances in the operation of the spreading plate and irregularities in the dropping off of the material.

Die Erfindung wird im folgenden anhand eines in der Zeichnung veranschaulichten Ausführungsbei­spieles näher erläutert. In der Zeichnung zeigen

  • Fig.1 einen Vertikalschnitt durch die für die Erfindung wesentlichen Teile eines Sich­ters,
  • Fig.2 eine Aufsicht auf einen Quadranten des Streutellers,
  • Fig.3 und 4 Schnitte durch ein Führungselement bzw. ein Leitelement längs der Linien III-III bzw. IV-IV der Fig.2,
  • Fig.5 eine Teildarstellung eines Streutellers mit anders geformten Durchbrüchen.
The invention is explained below with reference to an embodiment illustrated in the drawing. Show in the drawing
  • 1 shows a vertical section through the parts of a classifier essential to the invention,
  • 2 shows a top view of a quadrant of the spreading plate,
  • 3 and 4 sections through a guide element or a guide element along the lines III-III or IV-IV of Figure 2,
  • 5 shows a partial representation of a spreading disc with differently shaped openings.

Der in Fig.1 veranschaulichte Sichter enthält einen Rotor 1 mit vertikaler Achse 2, der über eine Welle 3 von einem in der Zeichnung nicht veranschaulichten Motor angetrieben wird. Die Welle 3 ist an ihrem unteren Ende in einem Lager 4 gelagert, das über radiale Streben 5 im Sich­tergehäuse 6 gehalten ist.The classifier illustrated in FIG. 1 contains a rotor 1 with a vertical axis 2, which is driven via a shaft 3 by a motor not shown in the drawing. The shaft 3 is supported at its lower end in a bearing 4 which is held in the classifier housing 6 via radial struts 5.

Der Rotor 1 weist an seinem Umfang mit Abstand voneinander angeordnete Blätter 7 auf, die zweck­mäßig verstellbar sind.The rotor 1 has on its circumference spaced-apart blades 7 which are expediently adjustable.

An der Oberseite des Rotors 1 ist ein mit dem Rotor drehbarer, ringförmiger Streuteller 8 vorgesehen, dessen Ausgestaltung anhand von Fig.2 noch im einzelnen erläutert wird.On the upper side of the rotor 1 there is an annular scattering plate 8 which can be rotated with the rotor, the configuration of which is explained in detail with reference to FIG.

Zur Aufgabe des zu sichtenden Gutes auf den Streuteller 8 dienen zwei diametral angeordnete Guteinführstutzen 9, 10.Two diametrically arranged material insertion nozzles 9, 10 serve to feed the material to be sifted onto the spreading plate 8.

Der Rotor 1 wird mit Abstand (Abstandsmaß x) von einem feststehenden Leitapparat 11 umgeben, der einstellbare Leitschaufeln 12 enthält und zur Zuführung eines Sichtluftstromes (Pfeile 13) dient, der aus dem unteren Teil des Sichter­gehäuses 6 zuströmt, den Leitapparat 11 und den Rotor 1 durchströmt und durch einen zentral oberhalb des Rotors 1 angeordneten Kanal 14 ab­strömt.The rotor 1 is surrounded at a distance (distance dimension x) by a fixed guide device 11, which contains adjustable guide vanes 12 and serves to supply a stream of classifying air (arrows 13) which flows from the lower part of the classifier housing 6, the guide device 11 and the rotor 1 flows through and flows through a channel 14 arranged centrally above the rotor 1.

Die Leitschaufeln 12 des Leitapparates 11 sind exzentrisch gelagert (Achse 15), so daß bei einer Veränderung der Leitschaufelstellung der Ab­stand x zwischen den Leitschaufeln 12 und dem Umfang des Rotors 1 konstant bleibt.The guide vanes 12 of the guide apparatus 11 are mounted eccentrically (axis 15), so that the distance x between the guide vanes 12 and the circumference of the rotor 1 remains constant when the guide vane position changes.

Unterhalb von Rotor 1 und Leitapparat 11 ist ein Trichter 16 zur Abführung des Grobgutes (Pfeil 17) vorgesehen. Das Feingut (Pfeil 18) verläßt den Sichter zusammen mit der Sichtluft durch den Kanal 14 und wird beispielsweise in einem außerhalb des Sichters angeordneten Zyklon ab­geschieden.A funnel 16 for discharging the coarse material (arrow 17) is provided below the rotor 1 and the guide apparatus 11. The fine material (arrow 18) leaves the classifier together with the classifying air through channel 14 and is separated, for example, in a cyclone arranged outside the classifier.

Anhand der Fig.2 wird im folgenden die erfindungs­gemäße Gestaltung des Streutellers 8 näher er­läutert.The configuration of the spreading plate 8 according to the invention is explained in more detail below with reference to FIG.

Der Streuteller 8 ist in seinem Umfangsbereich mit einer Anzahl von Durchbrüchen 19 versehen, die in gleichmäßiger Umfangsteilung angeordnet sind und beim Ausführungsbeispiel gemäß Fig.2 die Form von Langlöchern aufweisen, deren Achse 20 mit der radialen Richtung einen Winkel α₁ einschließt.The spreading plate 8 is provided in its peripheral region with a number of openings 19, which are arranged in a uniform circumferential division and in the embodiment according to FIG. 2 have the shape of elongated holes, the axis 20 of which includes an angle α 1 with the radial direction.

Auf der Außenseite werden die Durchbrüche 19 durch Führungselemente 21 begrenzt, die im Drehsinn des Streutellers (Pfeil 22) um den be­reits genannten Winkel α₁ gegenüber der radialen Richtung geneigt sind.On the outside, the openings 19 are delimited by guide elements 21 which are inclined in the direction of rotation of the spreading plate (arrow 22) by the angle α 1 already mentioned with respect to the radial direction.

Zwischen dem radial äußeren Ende der einzelnen Führungselemente 21 und dem radial inneren Ende des in Drehrichtung vorangehenden Führungsele­mentes ist jeweils ein Leitelement 23 angeordnet, das entgegengesetzt zum Drehsinn des Streutellers 8 gegenüber der radialen Richtung um einen Winkel α2 geneigt ist. Die Führungselemente 21 und die Leitelemente 23 sind damit zickzackförmig angeordnet, wobei die Durchbrüche 19 bis in den Zwickel der aneinandergrenzenden Führungs- und Leitelemente 21, 23 reichen.Between the radially outer end of the individual guide elements 21 and the radially inner end of the guide element preceding in the direction of rotation, a guide element 23 is arranged in each case, which is inclined in the opposite direction to the direction of rotation of the spreading plate 8 with respect to the radial direction by an angle α2. The guide elements 21 and the guide elements 23 are thus arranged in a zigzag shape, the openings 19 extending into the gusset of the adjacent guide and guide elements 21, 23.

Wie aus Fig.3 hervorgeht, sind die Führungselemen­te 21 gegenüber der vertikalen Lage geneigt und überdecken die Durchbrüche 19 mit Abstand. Das längs der Leitelemente 23 den Durchbrüchen 19 zugeführte Gut (Pfeil 24) wird durch die Führungs­ elemente 21 nach unten umgelenkt (Pfeil 25) und fällt durch die Durchbrüche 19 in den Sichtraum.As can be seen from FIG. 3, the guide elements 21 are inclined with respect to the vertical position and cover the openings 19 at a distance. The material (arrow 24) supplied to the openings 19 along the guide elements 23 is guided by the guide elements 21 deflected downwards (arrow 25) and falls through the openings 19 into the viewing space.

Der Winkel α₁, den die Führungselemente 21 mit der radialen Richtung bilden, liegt zweckmäßig zwischen 34 und 54°, vorzugsweise bei etwa 45°.The angle α₁, which the guide elements 21 form with the radial direction, is advantageously between 34 and 54 °, preferably about 45 °.

Der Winkel α₂, den die Leitelemente 23 mit der radialen Richtung bilden, liegt zweckmäßig zwischen 25 und 45°, vorzugsweise bei etwa 36°.The angle α₂, which the guide elements 23 form with the radial direction, is expediently between 25 and 45 °, preferably about 36 °.

Die Durchbrüche 19 sind auf einem Durchmesser angeordnet, der etwa dem mittleren Durchmesser des feststehenden Leitapparates 11 entspricht. Auf diese Weise wird das Gut im Unterschied zu den bisher bekannten Ausführungen nicht in den Zwischenraum zwischen dem Leitapparat 11 und dem Rotor 1, sondern in den Leitapparat selbst ein­gestreut. Hierdurch werden grobe Gutteilchen an den Wandungen der Leitschaufeln 12 abgetrennt und fallen direkt nach unten in den Trichter 16, ohne den zwischen dem Leitapparat 11 und dem Rotor 1 befindlichen Teil des Sichtraumes zu be­lasten.The openings 19 are arranged on a diameter which corresponds approximately to the average diameter of the fixed diffuser 11. In this way, in contrast to the previously known designs, the material is not sprinkled into the space between the guide device 11 and the rotor 1, but rather into the guide device itself. As a result, coarse particles of good are separated off on the walls of the guide vanes 12 and fall directly down into the funnel 16 without stressing the part of the viewing space located between the guide device 11 and the rotor 1.

Bei dem in Fig.5 dargestellten weiteren Ausführungs­beispiel der Erfindung sind die Durchbrüche 19 trapezförmig gestaltet, wobei die Trapezbasis von den Führungselementen 21 begrenzt wird.In the further exemplary embodiment of the invention shown in FIG. 5, the openings 19 are designed trapezoidal, the trapezoidal base being delimited by the guide elements 21.

Bei der erfindungsgemäßen Gestaltung wird durch die Wahl eines genügend kleinen Winkels α₂ (kleiner als 45°) unter Berücksichtigung der Corioliskraft erreicht, daß sich das Leitelement 23 bei der Drehbewegung des Streutellers 8 ge­wissermaßen vom Gutstrom wegbewegt, so daß Gut­anbackungen am Leitelement und ein starker Ver­schleiß vermieden werden.In the design according to the invention is achieved by choosing a sufficiently small angle α₂ (less than 45 °), taking into account the Coriolis force, that the guide element 23 moves to a certain extent away from the crop flow during the rotation of the spreading disc 8, so that caking on the guide element and heavy wear be avoided.

Claims (11)

1. Sichter, enthaltend a) einen angetriebenen Rotor (1) mit vertikaler Achse (2), der an seinem Umfang mit Abstand voneinander angeordnete Blätter (7) auf­weist, b) einen an der Oberseite des Rotors (1) ange­ordneten, mit dem Rotor drehbaren ringförmi­gen Streuteller (8), c) eine Einrichtung (9, 10) zur Aufgabe von zu sichtendem Gut auf den Streuteller (8), d) einen den Rotor (1) mit Abstand umgebenden feststehenden Leitapparat (11) mit einstell­baren Leitschaufeln (12) zur Zuführung eines Sichtluftstromes, der den Leitapparat (11) und den Rotor (1) von außen nach innen durchsetzt, e) einen zentral oberhalb des Rotors (1) ange­ordneten Kanal (14) zur Abführung des mit Feingut beladenen Sichtluftstromes, f) einen unterhalb von Rotor (1) und Leitappa­rat (11) angeordneten Trichter (16) zur Ab­führung des Grobgutes, 1. Sifter containing a) a driven rotor (1) with a vertical axis (2), which has blades (7) spaced apart on its circumference, b) an annular scattering plate (8) arranged on the top of the rotor (1) and rotatable with the rotor, c) a device (9, 10) for feeding material to be sifted onto the spreading plate (8), d) a stationary guide apparatus (11) surrounding the rotor (1) at a distance with adjustable guide vanes (12) for supplying a sifting air flow which passes through the guide apparatus (11) and the rotor (1) from the outside inwards, e) a channel (14) arranged centrally above the rotor (1) for discharging the fine air loaded with fine air, f) a funnel (16) arranged below the rotor (1) and guide apparatus (11) for removing the coarse material, gekennzeichnet durch folgende Merkmale: g) der Streuteller (8) ist in seinem Umfangs­bereich mit einer Anzahl von in gleichmäßi­ger Umfangsteilung angeordneten Durch­brüchen (19) versehen, h) auf der Außenseite werden die Durchbrüche (19) durch Führungselemente (21) begrenzt, die im Drehsinn des Streutellers gegenüber der radialen Richtung geneigt sind, i) zwischen dem radial äußeren Ende der einzel­nen Führungselemente (21) und dem radial inneren Ende der in Drehrichtung vorangehen­den Führungselemente sind Leitelemente (23) angeordnet, die entgegengesetzt zum Dreh­sinn des Streutellers gegenüber der radia­len Richtung geneigt sind. characterized by the following features: g) the spreading plate (8) is provided in its peripheral region with a number of openings (19) arranged in a uniform peripheral division, h) on the outside, the openings (19) are delimited by guide elements (21) which are inclined in the direction of rotation of the spreading plate with respect to the radial direction, i) between the radially outer end of the individual guide elements (21) and the radially inner end of the guide elements preceding in the direction of rotation, guide elements (23) are arranged which are inclined in the opposite direction to the direction of rotation of the spreading plate with respect to the radial direction. 2. Sichter nach Anspruch 1, dadurch gekennzeich­net, daß der Winkel ( α₁), den die Führungs­elemente (21) mit der radialen Richtung bil­den, zwischen 34 und 54°, vorzugsweise bei 45°, liegt.2. Sifter according to claim 1, characterized in that the angle (α₁) which the guide elements (21) form with the radial direction is between 34 and 54 °, preferably 45 °. 3. Sichter nach Anspruch 1, dadurch gekennzeich­net, daß der Winkel ( α₂ ), den die Leit­elemente (23) mit der radialen Richtung bil­den, zwischen 25 und 45°, vorzugsweise bei 36°, liegt.3. Sifter according to claim 1, characterized in that the angle (α₂) which the guide elements (23) form with the radial direction is between 25 and 45 °, preferably at 36 °. 4. Sichter nach Anspruch 1, dadurch gekennzeich­net, daß die Durchbrüche (19) auf einem Durchmesser angeordnet sind, der dem mitt­leren Durchmesser des Leitapparates (11) ent­spricht.4. Sifter according to claim 1, characterized in that the openings (19) are arranged on a diameter which corresponds to the average diameter of the diffuser (11). 5. Sichter nach Anspruch 1, dadurch gekennzeich­net, daß die Führungselemente (21) gegenüber der vertikalen Lage geneigt sind und die Durch­brüche (19) mit Abstand mindestens teilweise überdecken.5. Sifter according to claim 1, characterized in that the guide elements (21) are inclined with respect to the vertical position and the openings (19) at least partially cover at a distance. 6. Sichter nach Anspruch 1, dadurch gekennzeich­net, daß die Durchbrüche (19) bis in den Zwickel zwischen den zickzackförmig aneinan­dergrenzenden Führungselementen (21) und Leitelementen (23) reichen.6. Sifter according to claim 1, characterized in that the openings (19) extend into the gusset between the zigzag adjacent guide elements (21) and guide elements (23). 7. Sichter nach Anspruch 1, dadurch gekennzeich­net, daß die Durchbrüche (19) als Langlöcher ausgebildet sind, deren Achse (20) parallel zur Achse der Führungselemente (21) verläuft.7. Sifter according to claim 1, characterized in that the openings (19) are designed as elongated holes, the axis (20) of which runs parallel to the axis of the guide elements (21). 8. Sichter nach Anspruch 1, dadurch gekennzeich­net, daß die Durchbrüche (19) trapezförmig ausgebildet sind, wobei die Trapezbasis von den Führungselementen (21) begrenzt wird.8. Sifter according to claim 1, characterized in that the openings (19) are trapezoidal, the trapezoidal base being delimited by the guide elements (21). 9. Sichter nach Anspruch 1, dadurch gekennzeich­net, daß die Einrichtung zur Aufgabe von zu sichtendem Gut auf dem Streuteller (8) mehrere, vorzugsweise zwei diametral angeordnete Gut­ zuführstellen (9, 10) enthält.9. Sifter according to claim 1, characterized in that the device for placing material to be sifted on the spreading plate (8) has several, preferably two, diametrically arranged material feed points (9, 10) contains. 10. Sichter nach Anspruch 1, dadurch gekennzeich­net, daß die einstellbaren Leitschaufeln (12) exzentrisch derart gelagert sind, daß der Ab­stand(x)zwischen den Leitschaufeln und dem Rotor (1) bei Veränderung der Leitschaufel­stellung konstant bleibt.10. Sifter according to claim 1, characterized in that the adjustable guide vanes (12) are mounted eccentrically such that the distance (x) between the guide vanes and the rotor (1) remains constant when the guide vane position changes.
EP86110245A 1985-11-07 1986-07-25 Separator Expired - Lifetime EP0221246B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3539512 1985-11-07
DE19853539512 DE3539512A1 (en) 1985-11-07 1985-11-07 SAFE

Publications (3)

Publication Number Publication Date
EP0221246A2 true EP0221246A2 (en) 1987-05-13
EP0221246A3 EP0221246A3 (en) 1988-10-05
EP0221246B1 EP0221246B1 (en) 1990-05-30

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ID=6285396

Family Applications (1)

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EP86110245A Expired - Lifetime EP0221246B1 (en) 1985-11-07 1986-07-25 Separator

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US (1) US4693811A (en)
EP (1) EP0221246B1 (en)
BR (1) BR8604755A (en)
DE (2) DE3539512A1 (en)
ES (1) ES2003470A6 (en)
ZA (1) ZA865718B (en)

Cited By (5)

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EP0374491A2 (en) * 1988-12-22 1990-06-27 Krupp Polysius Ag Sifter
EP0377826A2 (en) * 1989-01-12 1990-07-18 Krupp Polysius Ag Sifter
EP0534483A2 (en) * 1991-09-27 1993-03-31 Engma Engineers Beheer Centrifugal separator with turbine
WO1996032204A1 (en) * 1995-04-11 1996-10-17 Hosokawa Mikropul Gesellschaft Für Mahl- Und Staubtechnik Mbh Grader
EP2659988A1 (en) 2012-05-02 2013-11-06 Alstom Technology Ltd Adjustable mill classifier

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DE3865906D1 (en) * 1987-07-03 1991-12-05 Ciba Geigy Ag SPRAY DRYER FOR THE PRODUCTION OF POWDERS, AGGLOMERATES OR THE LIKE.
DE3808022A1 (en) * 1988-03-10 1989-09-21 Krupp Polysius Ag Separator
FR2658096B1 (en) * 1990-02-13 1992-06-05 Fives Cail Babcock AIR SELECTOR WITH CENTRIFUGAL ACTION.
DE4112018A1 (en) * 1990-06-08 1991-12-12 Kloeckner Humboldt Deutz Ag SAFE
DE4025247A1 (en) * 1990-08-09 1992-02-13 Nied Roland Turbine-type air sifter - has lower end plate of rotor dished so that distance between end plates increases towards centre
AT401741B (en) * 1993-08-19 1996-11-25 Thaler Horst Dipl Ing WINDSIGHTER
FR2741286B1 (en) * 1995-11-21 1998-01-23 Fcb AIR SEPARATOR WITH CENTRIFUGAL ACTION
US5927510A (en) * 1997-02-19 1999-07-27 Xerox Corporation Particle classification apparatus and processes thereof
DE102006044833B4 (en) * 2006-09-20 2010-01-21 Babcock Borsig Service Gmbh Centrifugal separator and method for sifting
US9211547B2 (en) 2013-01-24 2015-12-15 Lp Amina Llc Classifier
US9981290B2 (en) * 2013-09-09 2018-05-29 Coal Milling Projects (Pty) Limited Static classifier

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374491A2 (en) * 1988-12-22 1990-06-27 Krupp Polysius Ag Sifter
DE3843338A1 (en) * 1988-12-22 1990-06-28 Krupp Polysius Ag SAFE
EP0374491A3 (en) * 1988-12-22 1991-12-11 Krupp Polysius Ag Sifter
EP0377826A2 (en) * 1989-01-12 1990-07-18 Krupp Polysius Ag Sifter
DE3900779A1 (en) * 1989-01-12 1990-07-19 Krupp Polysius Ag SAFE
EP0377826A3 (en) * 1989-01-12 1991-07-03 Krupp Polysius Ag Sifter
EP0534483A2 (en) * 1991-09-27 1993-03-31 Engma Engineers Beheer Centrifugal separator with turbine
EP0534483A3 (en) * 1991-09-27 1994-10-26 Energietechnik Ag Gempa Haus Centrifugal separator with turbine
WO1996032204A1 (en) * 1995-04-11 1996-10-17 Hosokawa Mikropul Gesellschaft Für Mahl- Und Staubtechnik Mbh Grader
EP2659988A1 (en) 2012-05-02 2013-11-06 Alstom Technology Ltd Adjustable mill classifier

Also Published As

Publication number Publication date
BR8604755A (en) 1987-06-30
US4693811A (en) 1987-09-15
EP0221246B1 (en) 1990-05-30
DE3539512A1 (en) 1987-05-14
EP0221246A3 (en) 1988-10-05
ES2003470A6 (en) 1988-11-01
ZA865718B (en) 1987-03-25
DE3671606D1 (en) 1990-07-05

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