EP1294488B1 - Cyclone separator with central built-in element - Google Patents

Cyclone separator with central built-in element Download PDF

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Publication number
EP1294488B1
EP1294488B1 EP01936435A EP01936435A EP1294488B1 EP 1294488 B1 EP1294488 B1 EP 1294488B1 EP 01936435 A EP01936435 A EP 01936435A EP 01936435 A EP01936435 A EP 01936435A EP 1294488 B1 EP1294488 B1 EP 1294488B1
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EP
European Patent Office
Prior art keywords
built
conical
central
housing
cyclone separator
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EP01936435A
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German (de)
French (fr)
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EP1294488A1 (en
Inventor
Peter Hoffmann
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Hosokawa Alpine AG
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Hosokawa Micron GmbH
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    • 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
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks

Definitions

  • the invention also relates to a method for influencing the particle size distribution of powders using a cyclone separator of this type.
  • the prior art also includes the content of the specifications FR-25 80 195 A, EP-468 426 A and FR-11 23 112 A. They disclose classifier, each having a housing, a sifting wheel disposed therein and internals therein. The internals limit gap areas, in each of which a visual effect takes place.
  • the present invention has for its object to provide a cyclone separator of the known type with improved Klassierseigenschaften, thereby expanding its scope.
  • a controlled flow guidance is achieved which, compared with the prior art, provides improved classification results. It is essential that the lower, cone-shaped installation forms a defined gap with the housing. This gap is decisive for the improved classification properties of the cyclone separator according to the invention. By adjusting the gap size, it is possible to influence the grain distribution of the powders to be processed.
  • the housing of the cyclone separator 1 is denoted by 2, its upper portion by 3, its central, conically downwardly tapering portion by 4 and its lower portion by 5.
  • the upper section 3 is a separator 6. Only the classifier wheel is shown schematically.
  • the upper portion is laterally equipped with a carrier gas / product inlet 7 (preferably tangentially arranged) and with a carrier gas / fines discharge 8 (centrally located).
  • the axis of the system is designated 9.
  • the middle section 4 there are two centrally arranged, rotationally symmetrical internals. On the one hand, it is an upwardly and downwardly open, (at least in the region of its lower portion) downwardly tapered mounting 10, whose upper diameter is greater than the diameter of the prepareerrades 6. It can extend into the upper, preferably cylindrical portion 3 of the housing 2 hineineruiten and ends immediately below the prepareerrades 6. Below the installation 10 is the second installation 11, which is at a distance below the lower opening the mounting 10 is arranged and has the shape of a downwardly widening cone sheath.
  • This conical installation 11 is mounted height adjustable on the installation 10.
  • a mounted on the mounting 10 strut 12 is provided, on which a support 13 of the cone 11 in the height adjustable, for example via a thread, is supported.
  • the lower housing section 5 is equipped with a coarse material outlet not shown in detail (indicated by the arrow 14).
  • a coarse material outlet not shown in detail (indicated by the arrow 14).
  • pipe connections 15 are provided for the supply of secondary gases, preferably secondary air. These can open radially into the lower housing section 5 (FIGS. 1, 4 and 5).
  • Tangentially opening pipe connections 15 are shown in FIGS. 2 and 3.
  • the solutions according to these figures differ in the direction of rotation of the vortices generated by the incoming secondary air streams (arrows 16, 17).
  • the product / carrier gas flow enters tangentially in the height of the separator wheel 6 in the upper portion 3 of the housing 2. Very fine particles follow the carrier gas through classifier wheel 6 and leave the housing 2 through the carrier gas / fines discharge. The remaining portion of the registered product / carrier gas stream flows in the annular space between the housing 10 and the outer housing 2 in spiral tracks down.
  • the installation 10 has the well-known purpose of separating the carrier gas / particle streams directed upwards in the peripheral region and upwards in the central region.
  • the lower installation 11 forms a defined gap 18 with the outer housing 2. In the region of this gap, a further screening of the downwardly directed carrier gas / particle flows takes place. This sighting is especially effective By means of secondary air, supplied via the pipe connections 15 at the lower housing section 5, a countercurrent is generated in the region of the gap 18. It may be advantageous to supply the secondary air tangentially, either in the same direction or in opposite directions with or for the supply of the carrier gas / particle flow. The separated in the gap 18 fine material is passed through the interior of the installation 10 again to the separator 6. The product that passes through the gap 18 is discharged as coarse material.
  • the conical installation 11 has, on the one hand, the task of preventing a renewed rise of the product located in the lower region of the housing 2 due to flow turbulences.
  • the size of the gap 18 influences the fines content of the fines. Characterized in that the size of the gap 18 is adjustable, and the fine fraction can be varied at the fines.
  • the installation 10 has over its entire height a conical, downwardly tapering shape.
  • the plane of its upper opening lies directly below the reformerrades 6.
  • the plane of its lower opening is in the range of the average height of the conical portion 4 of the outer housing. 2
  • FIGs 4 and 5 show further designs of the installation 10. It has similar to the housing 2 different sections.
  • a lower conical portion 10a and an upper cylindrical portion 10 b are provided.
  • the transition from cylindrical to conical is about the same height as the outer housing 2 (transition from section 3 to section 4).
  • a conically downwardly widening section 10c first adjoins the upper opening of the installation 10. This portion may transition, as shown in Figure 5, into the cylindrical portion 10b or directly into the conical downwardly tapering portion 10a.
  • the cyclone separator according to the invention not only has improved classification properties; In addition, it makes it possible to specifically influence the size of the fine fraction of a fine-grained powder.
  • the fine fraction ⁇ 10 ⁇ can be varied within relatively large ranges. Simply by changing the secondary air volume flow or the peripheral speed of the classifier wheel, the fine fraction can already be set in a range which lies between a first (smaller) value and a second value increased by up to 70%.
  • this particle size distribution can be influenced by changing the size of the gap 18.
  • the size of the gap 18 was about 10 mm (with a diameter of the lower edge of the cone 11 of about 130 cm). By changing the height of the cone 11, the gap 18 is adjustable over a wide range.

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  • Polarising Elements (AREA)

Abstract

A cyclone separator ( 1 ) has a vertically extending housing ( 2 ) with an upper housing segment ( 3 ). A separator ( 6 ) with a separator wheel is located in the upper housing segment along with a carrier gas/product inlet ( 7 ), and a carrier gas/fines discharge ( 8 ). A lower housing segment ( 5 ) is equipped with a coarse grain discharge ( 14 ). In order to increase the operating range of the cyclone separator, the lower opening of the central built-in element ( 10 ) is located at the level of the conical middle housing segment ( 4 ) and that below the lower opening is disposed a conical built-in element ( 11 ), which has the shape of a cone expanding in downward direction.

Description

Die Erfindung bezieht sich auf einen Zyklonsichter mit den Merkmalen des Oberbegriffs des Patentanspruchs 1. Außerdem betrifft die Erfindung ein Verfahren zur Beeinflussung der Kornverteilung von Pulvern unter Verwendung eines Zyklonsichters dieser Art.The invention also relates to a method for influencing the particle size distribution of powders using a cyclone separator of this type.

Bei der Herstellung, Behandlung und/oder Verarbeitung von Pulvern mit einer Korngröße im µ-Bereich, beispielsweise auf dem Gebiet der Herstellung von Beschichtungspulvern, werden an die Kornverteilungen immer höhere Anforderungen gestellt. Relevant ist nicht mehr nur die Einhaltung einer bestimmten oberen Partikelgröße; auch die Einhaltung einer bestimmten Partikelgrößenverteilung wird gefordert, und zwar je nach Anwendung unterschiedlich, in der Regel in Bezug auf den Feinanteil.In the production, treatment and / or processing of powders having a particle size in the μ-range, for example in the field of the production of coating powders, the grain distributions are becoming increasingly demanding. Relevant is no longer just compliance with a certain upper particle size; compliance with a specific particle size distribution is also required, depending on the application, usually with regard to the fines content.

Aus der DE 196 08 142 A1 ist ein Zyklonsichter der hier betroffenen Art bekannt. Bei Versuchen mit diesem Zyklonsichter, Einfluß auf die Kornverteilung von Pulvern zu nehmen, ergab sich, dass er den geänderten Anforderungen in Bezug auf den Feinanteil im Grobgut nicht immer gerecht wird.From DE 196 08 142 A1 a cyclone separator of the type concerned is known. In experiments with this cyclone straightener to influence the particle size distribution of powders, it was found that it does not always meet the changed requirements regarding the fines content of coarse material.

Zum Stand der Technik gehört außerdem noch der Inhalt der Schriften FR-25 80 195 A, EP-468 426 A und FR-11 23 112 A. Sie offenbaren Sichter mit jeweils einem Gehäuse, einem darin angeordneten Sichterrad sowie darin befindlichen Einbauten. Die Einbauten begrenzen Spaltbereiche, in denen jeweils eine Sichtwirkung stattfindet.The prior art also includes the content of the specifications FR-25 80 195 A, EP-468 426 A and FR-11 23 112 A. They disclose classifier, each having a housing, a sifting wheel disposed therein and internals therein. The internals limit gap areas, in each of which a visual effect takes place.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Zyklonsichter der vorbekannten Art mit verbesserten Klassierungseigenschaften zu schaffen, um dadurch seinen Arbeitsbereich zu erweitern.The present invention has for its object to provide a cyclone separator of the known type with improved Klassierseigenschaften, thereby expanding its scope.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale der Patentansprüche erreicht.According to the invention this object is achieved by the characterizing features of the claims.

Durch die Einbauten im erfindungsgemäßen Zyklonsichter wird eine kontrollierte Strömungsführung erreicht, die im Vergleich zum Stand der Technik verbesserte Klassierungsergebnisse liefert. Wesentlich ist dabei, dass der untere, kegelförmige Einbau mit dem Gehäuse einen definierten Spalt bildet. Dieser Spalt ist entscheidend für die verbesserten Klassierungseigenschaften des erfindungsgemäßen Zyklonsichters. Durch Einstellung der Spaltgröße kann Einfluß auf die Kornverteilung der zu verarbeitenden Pulver genommen werden.By means of the internals in the cyclone separator according to the invention, a controlled flow guidance is achieved which, compared with the prior art, provides improved classification results. It is essential that the lower, cone-shaped installation forms a defined gap with the housing. This gap is decisive for the improved classification properties of the cyclone separator according to the invention. By adjusting the gap size, it is possible to influence the grain distribution of the powders to be processed.

Weitere Vorteile und Einzelheiten der Erfindung sollen anhand von in den Figuren 1 bis 5 schematisch dargestellten Ausführungsbeispielen für Zyklonsichter nach der Erfindung erläutert werden.Further advantages and details of the invention will be explained with reference to embodiments of cyclone lights according to the invention shown schematically in Figures 1 to 5.

In allen Figuren ist das Gehäuse des Zyklonsichters 1 mit 2, sein oberer Abschnitt mit 3, sein mittlerer, sich konisch nach unten verjüngender Abschnitt mit 4 und sein unterer Abschnitt mit 5 bezeichnet. Im oberen Abschnitt 3 befindet sich ein Sichter 6. Nur das Sichterrad ist schematisch dargestellt. Außerdem ist der obere Abschnitt seitlich mit einem Trägergas-/Produkt-Einlass 7 (vorzugsweise tangential angeordnet) und mit einem Trägergas-/Feingutaustrag 8 (zentral angeordnet) ausgerüstet. Die Achse des Systems ist mit 9 bezeichnet.In all the figures, the housing of the cyclone separator 1 is denoted by 2, its upper portion by 3, its central, conically downwardly tapering portion by 4 and its lower portion by 5. In the upper section 3 is a separator 6. Only the classifier wheel is shown schematically. In addition, the upper portion is laterally equipped with a carrier gas / product inlet 7 (preferably tangentially arranged) and with a carrier gas / fines discharge 8 (centrally located). The axis of the system is designated 9.

Etwa in Höhe des mittleren Abschnittes 4 befinden sich zwei zentral angeordnete, rotationssymmetrische Einbauten. Zum einen handelt es sich um einen oben und unten offenen, sich (zumindest im Bereich seines unteren Abschnittes) nach unten verjüngenden Einbaus 10, dessen oberer Durchmesser größer ist als der Durchmesser des Sichterrades 6. Er kann sich bis in den oberen, vorzugsweise zylindrischen Abschnitt 3 des Gehäuses 2 hineinerstrecken und unmittelbar unterhalb des Sichterrades 6 enden. Unterhalb des Einbaus 10 befindet sich der zweite Einbau 11, der mit Abstand unterhalb der unteren Öffnung des Einbaus 10 angeordnet ist und die Form eines sich nach unten erweiternden Kegelmantels hat. Dieser kegelförmige Einbau 11 ist am Einbau 10 höhenverstellbar befestigt. Dazu ist eine am Einbau 10 befestigte Strebe 12 vorgesehen, an der ein Träger 13 des Kegels 11 in der Höhe einstellbar, z.B. über ein Gewinde, gehaltert ist.Approximately at the level of the middle section 4 there are two centrally arranged, rotationally symmetrical internals. On the one hand, it is an upwardly and downwardly open, (at least in the region of its lower portion) downwardly tapered mounting 10, whose upper diameter is greater than the diameter of the Sichterrades 6. It can extend into the upper, preferably cylindrical portion 3 of the housing 2 hineinerstrecken and ends immediately below the Sichterrades 6. Below the installation 10 is the second installation 11, which is at a distance below the lower opening the mounting 10 is arranged and has the shape of a downwardly widening cone sheath. This conical installation 11 is mounted height adjustable on the installation 10. For this purpose, a mounted on the mounting 10 strut 12 is provided, on which a support 13 of the cone 11 in the height adjustable, for example via a thread, is supported.

Der untere Gehäuseabschnitt 5 ist mit einem im einzelnen nicht dargestellten Grobgut-Auslass (angedeutet durch den Pfeil 14) ausgerüstet. Außerdem sind ein oder mehrere (zwei sind dargestellt) Rohranschlüsse 15 für die Zufuhr von Sekundärgasen, vorzugsweise Sekundärluft, vorgesehen. Diese können radial in den unteren Gehäuseabschnitt 5 münden (Figuren 1, 4 und 5).The lower housing section 5 is equipped with a coarse material outlet not shown in detail (indicated by the arrow 14). In addition, one or more (two are shown) pipe connections 15 are provided for the supply of secondary gases, preferably secondary air. These can open radially into the lower housing section 5 (FIGS. 1, 4 and 5).

Tangential mündende Rohranschlüsse 15 sind in den Figuren 2 und 3 dargestellt. Die Lösungen nach diesen Figuren unterscheiden sich in der Drehrichtung der Wirbel, die von den eintretenden Sekundärluftströmen erzeugt werden (Pfeile 16, 17).Tangentially opening pipe connections 15 are shown in FIGS. 2 and 3. The solutions according to these figures differ in the direction of rotation of the vortices generated by the incoming secondary air streams (arrows 16, 17).

Während des Betriebs des Zyklonsichters 1 nach der Erfindung tritt der Produkt-/Trägergasstrom tangential in Höhe des Sichterrades 6 in den oberen Abschnitt 3 des Gehäuses 2 ein. Sehr feine Partikel folgen dem Trägergas durch das Sichterrad 6 und verlassen das Gehäuse 2 durch den Trägergas-/FeingutAustrag. Der verbliebene Anteil des eingetragenen Produkt-/Trägergasstromes strömt in dem Ringraum zwischen dem Einbau 10 und dem Außengehäuse 2 in spiralförmigen Bahnen nach unten. Der Einbau 10 hat den an sich bekannten Zweck, die im peripheren Bereich abwärts und im zentralen Bereich aufwärts gerichteten Trägergas-/Partikelströme voneinander zu trennen.During operation of the cyclone sight 1 according to the invention, the product / carrier gas flow enters tangentially in the height of the separator wheel 6 in the upper portion 3 of the housing 2. Very fine particles follow the carrier gas through classifier wheel 6 and leave the housing 2 through the carrier gas / fines discharge. The remaining portion of the registered product / carrier gas stream flows in the annular space between the housing 10 and the outer housing 2 in spiral tracks down. The installation 10 has the well-known purpose of separating the carrier gas / particle streams directed upwards in the peripheral region and upwards in the central region.

Der untere Einbau 11 bildet mit dem Außengehäuse 2 einen definierten Spalt 18. Im Bereich dieses Spaltes findet eine weitere Sichtung der abwärts gerichteten Trägergas-/Partikelströme statt. Diese Sichtung ist besonders wirksam, beil mit Hilfe von Sekundärluft, zugeführt über die Rohranschlüsse 15 am unteren Gehäuseabschnitt 5, im Bereich des Spaltes 18 ein Gegenstrom erzeugt wird. Dabei kann es vorteilhaft sein, auch die Sekundärluft tangential zuzuführen, und zwar entweder gleichsinnig oder gegensinnig mit der bzw. zur Zufuhr des Trägergas-/Partikelstroms. Das im Spalt 18 abgetrennte Feingut wird durch das Innere des Einbaus 10 erneut zum Sichter 6 geführt. Das Produkt, das den Spalt 18 passiert, wird als Grobgut ausgetragen.The lower installation 11 forms a defined gap 18 with the outer housing 2. In the region of this gap, a further screening of the downwardly directed carrier gas / particle flows takes place. This sighting is especially effective By means of secondary air, supplied via the pipe connections 15 at the lower housing section 5, a countercurrent is generated in the region of the gap 18. It may be advantageous to supply the secondary air tangentially, either in the same direction or in opposite directions with or for the supply of the carrier gas / particle flow. The separated in the gap 18 fine material is passed through the interior of the installation 10 again to the separator 6. The product that passes through the gap 18 is discharged as coarse material.

Der kegelförmige Einbau 11 hat zum einen die Aufgabe, ein erneutes Aufsteigen des sich im unteren Bereich des Gehäuses 2 befindlichen Produktes aufgrund von Strömungsturbulenzen zu verhindern. Neben der Drehzahl des Sichters 6 und die zugeführte Sekundärluftmenge beeinflusst die Größe des Spaltes 18 den Feinanteil am Feingut. Dadurch, dass die Größe des Spaltes 18 einstellbar ist, kann auch der Feinanteil am Feingut variiert werden.The conical installation 11 has, on the one hand, the task of preventing a renewed rise of the product located in the lower region of the housing 2 due to flow turbulences. In addition to the speed of the separator 6 and the amount of secondary air supplied, the size of the gap 18 influences the fines content of the fines. Characterized in that the size of the gap 18 is adjustable, and the fine fraction can be varied at the fines.

In Figur 1 hat der Einbau 10 über seine gesamte Höhe eine konische, sich nach unten verjüngende Form. Die Ebene seiner oberen Öffnung liegt unmittelbar unterhalb des Sichterrades 6. Die Ebene seiner unteren Öffnung liegt im Bereich der mittleren Höhe des konischen Abschnittes 4 des äußeren Gehäuses 2.In Figure 1, the installation 10 has over its entire height a conical, downwardly tapering shape. The plane of its upper opening lies directly below the Sichterrades 6. The plane of its lower opening is in the range of the average height of the conical portion 4 of the outer housing. 2

Die Figuren 4 und 5 zeigen weitere Gestaltungen des Einbaus 10. Er weist ähnlich dem Gehäuse 2 unterschiedliche Abschnitte auf.Figures 4 and 5 show further designs of the installation 10. It has similar to the housing 2 different sections.

Bei der Ausführung nach Figur 4 sind ein unterer konischer Abschnitt 10a und ein oberer zylindrischer Abschnitt 10 b vorgesehen. Der Übergang von zylindrisch zu konisch liegt etwa in der gleichen Höhe wie beim äußeren Gehäuse 2 (Übergang von Abschnitt 3 zu Abschnitt 4).In the embodiment of Figure 4, a lower conical portion 10a and an upper cylindrical portion 10 b are provided. The transition from cylindrical to conical is about the same height as the outer housing 2 (transition from section 3 to section 4).

Bei der Ausführung nach Figur 5 schließt sich an die obere Öffnung des Einbaus 10 zunächst ein sich konisch nach unten erweiternder Abschnitt 10c an. Dieser Abschnitt kann übergehen - wie in Figur 5 dargestellt - in den zylindrischen Abschnitt 10b oder direkt in den konisch sich nach unten verjüngenden Abschnitt 10a.In the embodiment according to FIG. 5, a conically downwardly widening section 10c first adjoins the upper opening of the installation 10. This portion may transition, as shown in Figure 5, into the cylindrical portion 10b or directly into the conical downwardly tapering portion 10a.

Wie bereits erwähnt, hat der Zyklonsichter nach der Erfindung nicht nur verbesserte Klassierungseigenschaften; er erlaubt es darüber hinaus, gezielt Einfluss auf die Größe des Feinanteiles eines feinkörnigen Pulvers zu nehmen. Versuche haben ergeben, dass der Feinanteil <10 µ innerhalb relativ großer Bereiche variierbar ist. Allein durch Veränderung des Sekundärluftvolumenstromes oder der Umfangsgeschwindigkeit des Sichterrades lässt sich der Feinanteil bereits in einem Bereich einstellen, der zwischen einem ersten (kleineren) Wert und einem zweiten um bis zu 70% vergrößerten Wert liegt. Auf diese Partikelgrößenverteilung kann weiterhin durch Veränderung der Größe des Spaltes 18 Einfluss genommen werden.As already mentioned, the cyclone separator according to the invention not only has improved classification properties; In addition, it makes it possible to specifically influence the size of the fine fraction of a fine-grained powder. Experiments have shown that the fine fraction <10 μ can be varied within relatively large ranges. Simply by changing the secondary air volume flow or the peripheral speed of the classifier wheel, the fine fraction can already be set in a range which lies between a first (smaller) value and a second value increased by up to 70%. In addition, this particle size distribution can be influenced by changing the size of the gap 18.

Bei den Versuchen bezüglich der Einflüsse von Drehzahl und Sekundärluftmenge betrug die Größe des Spaltes 18 etwa 10 mm (bei einem Durchmesser des unteren Randes des Kegels 11 von etwa 130 cm). Durch Veränderung der Höhe des Kegels 11 ist der Spalt 18 in einem weiten Bereich einstellbar.In the experiments on the influences of speed and secondary air quantity, the size of the gap 18 was about 10 mm (with a diameter of the lower edge of the cone 11 of about 130 cm). By changing the height of the cone 11, the gap 18 is adjustable over a wide range.

Claims (10)

  1. Cyclone separator (1) having a vertically arranged housing (2) with an upper housing segment (3) containing the separator (6) with a separator wheel and said housing segment being equipped with a carrier-gas/product inlet (7) as well as a carrier-gas/fine-particle outlet (8) and said housing having a central conical segment (4) the diameter of which gets continuously smaller downward to its base and said conical segment containing a built-in element (10) reaching up into the upper housing segment (3), preferably, as far up as the lower edges of the separator wheel vanes, said insert causing a cyclone-typical separation of the carrier-gas particle streams into one, in the peripheral region, flowing downward and into another, in the central region, flowing upward, and said housing, furthermore, being equipped with a lower housing segment (5) containing a rough-particle outlet (14) and at least one pipe connection (15) for the input of secondary air, whereby said cyclone separator is characterized by:
    the lower opening of the central built-in element (10) being on a level with the top of the central conical housing segment (4) whereby an additional built-in conical element (11) being enlarged toward its base is attached at such a distance below the lower edge of said opening of the central built-in element (10) that a flow-reversal separation occurs at the lower edge of the central built-in element (10) and that a gap (18) is created between said additional built-in conical element (11) and the housing (2), said gap being the place in the peripheral region where the downward flow of the carrier-gas/particle stream meets the secondary air stream being supplied through the pipe connection (15), thereby causing a counter-current separation.
  2. Cyclone separator in accordance with claim 1 characterized by:
    the central built-in element (10), likewise, having a conical shape the diameter of which, at the level of the conical housing segment (4), gets continuously smaller downward to its base.
  3. Cyclone separator in accordance with claim 2 characterized by:
    the conicity of insert (10) and housing segment (4) being approximately the same.
  4. Cyclone separator in accordance with claims 1, 2 or 3 characterized by:
    the outer edge of the built-in conical element (11) being located within the lower region of the conical housing segment (4).
  5. Cyclone separator in accordance with any one of the preceding claims characterized by:
    the vertical position of the lower built-in conical element (11) being adjustable.
  6. Cyclone separator in accordance with any one of the preceding claims 1 through 5 characterized by:
    the central built-in element (10) having a cylindrical shape within the region of the upper housing segment (3).
  7. Cyclone separator in accordance with any one of the preceding claims 1 through 5 characterized by:
    the upper opening of the central built-in element (10) being attached to a conical segment (10c) the diameter of which widens downward to its base.
  8. Cyclone separator in accordance with any one of the preceding claims characterized by:
    the lower housing segment (5) being equipped with one or more pipe connections (15) for the radially or tangentially directed provision of air.
  9. Cyclone separator in accordance with claim 8 characterized by:
    the carrier-gas/product inlet (7) and at least one pipe connection (15) being mounted tangentially in such fashion that the created gas-flow eddies are opposite in their direction of rotation.
  10. Procedures for the operation of a cyclone separator (1) having a vertically arranged housing (2) with an upper housing segment (3) containing the separator (6) with a separator wheel and said housing segment being equipped with a carrier-gas/product inlet (7) as well as a carrier-gas/fine-particle outlet (8), said housing having a central conical segment (4) the diameter of which gets continuously smaller downward to its base, and said conical segment containing a built-in element (10) reaching up into the upper housing segment (3), preferably, as far up as the lower edges of the separator wheel vanes, said insert causing a cyclone-typical separation of the carrier-gas particle streams into one, in the peripheral region, flowing downward and into another, in the central region, flowing upward, and said housing, furthermore, being equipped with a lower housing segment (5) containing a rough-particle outlet (14) and at least one pipe connection (15) for the input of secondary air, whereby said cyclone separator has the additional characteristic of the lower opening of the central built-in element (10) being on a level with the top of the central conical housing segment (4) whereby an additional built-in conical element (11) being enlarged toward its base is attached at such a distance below the lower edge of said opening of the central built-in element (10) that a flow-reversal separation occurs at the lower edge of the central built-in element (10), and a gap (18) being created between said additional built-in conical element (11) and the housing (2), said gap being the place in the peripheral region where the downward flow of the carrier-gas/particle stream meets the secondary air stream being supplied through the pipe connection (15), thereby causing a counter-current separation, whereby said procedure is characterized by:
    the possibility for influencing the ratio of fine particles in the particle distribution by varying the
    rotary speed of the separator (6), the amount of the secondary air provided and/or the vertical position of the conical built-in element (11).
EP01936435A 2000-06-23 2001-06-06 Cyclone separator with central built-in element Expired - Lifetime EP1294488B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10030705 2000-06-23
DE10030705A DE10030705A1 (en) 2000-06-23 2000-06-23 Cyclone sifter with central installation
PCT/EP2001/006411 WO2001097976A1 (en) 2000-06-23 2001-06-06 Cyclone separator with central built-in element

Publications (2)

Publication Number Publication Date
EP1294488A1 EP1294488A1 (en) 2003-03-26
EP1294488B1 true EP1294488B1 (en) 2006-04-19

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ID=7646603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01936435A Expired - Lifetime EP1294488B1 (en) 2000-06-23 2001-06-06 Cyclone separator with central built-in element

Country Status (6)

Country Link
US (1) US6957740B2 (en)
EP (1) EP1294488B1 (en)
AT (1) ATE323555T1 (en)
DE (2) DE10030705A1 (en)
ES (1) ES2264688T3 (en)
WO (1) WO2001097976A1 (en)

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Also Published As

Publication number Publication date
US6957740B2 (en) 2005-10-25
EP1294488A1 (en) 2003-03-26
DE50109555D1 (en) 2006-05-24
ATE323555T1 (en) 2006-05-15
WO2001097976A1 (en) 2001-12-27
ES2264688T3 (en) 2007-01-16
DE10030705A1 (en) 2002-01-03
US20040108256A1 (en) 2004-06-10

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