EP0297386A2 - Hydrocyclone - Google Patents

Hydrocyclone Download PDF

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Publication number
EP0297386A2
EP0297386A2 EP88109818A EP88109818A EP0297386A2 EP 0297386 A2 EP0297386 A2 EP 0297386A2 EP 88109818 A EP88109818 A EP 88109818A EP 88109818 A EP88109818 A EP 88109818A EP 0297386 A2 EP0297386 A2 EP 0297386A2
Authority
EP
European Patent Office
Prior art keywords
hydrocyclone
drum
rotor
inlet opening
area
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.)
Ceased
Application number
EP88109818A
Other languages
German (de)
French (fr)
Other versions
EP0297386A3 (en
Inventor
Raimund Rienecker
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0297386A2 publication Critical patent/EP0297386A2/en
Publication of EP0297386A3 publication Critical patent/EP0297386A3/en
Ceased legal-status Critical Current

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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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
    • D21D5/24—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in cyclones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • 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
    • B04C7/00—Apparatus not provided for in group B04C1/00, B04C3/00, or B04C5/00; Multiple arrangements not provided for in one of the groups B04C1/00, B04C3/00, or B04C5/00; Combinations of apparatus covered by two or more of the groups B04C1/00, B04C3/00, or B04C5/00
    • 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
    • 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
    • B04C2009/007—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with internal rotors, e.g. impeller, ventilator, fan, blower, pump

Definitions

  • the invention relates to a hydrocyclone according to the preamble of claim 1.
  • a hydrocyclone is known from AT-PS 328 851.
  • the rotor is used to guide the good material to be discharged into the good material space through the discharge channel formed in it. It has conveyor blades on its outer circumference which support the eddy flow, the tangential inlet being provided in this area. In general, this is at the top of the cyclone, which is preferably arranged vertically.
  • the heavy-duty drain opens naturally in the lower area. Heavy dirt is supposed to be separated by these hydrocyclones.
  • the working range of such cyclones is approximately in the middle consistency range between 1.5 and 4%.
  • the fabric Due to the high material density, the separation of heavy substances is relatively poor.
  • the fabric has good properties as a carrier medium and also transports relatively large, heavy parts into the area of accepted fabrics. Furthermore, direct short-circuit formation is possible if the rotor is designed to be relatively flat, so that the main flow runs directly from the inlet to the accept tube.
  • the object of the invention is to considerably improve the separation effect with regard to the heavy parts of such a cyclone.
  • the inlet is designated by 11.
  • the rotor 6, which is arranged in this entry area and is drum-like, is driven by a shaft 14.
  • the housing of the hydrocyclone 1 is essentially cylindrical, which then tapers - generally downwards - towards the outlet end for the heavy parts.
  • the Gutstoffabzugrohr 4 protrudes from this conical loading reaches upwards and extends a bit into the rotor drum 6 so that its inlet opening 7 is covered a bit by the rotor drum.
  • the overlap can be approximately between 10 and 20% of the inner diameter or 5 to 15% of the total length of the rotor drum 6.
  • the inner diameter of the rotor drum 6 will be approximately between 55 and 70% of the inner diameter of the cylindrical part of the hydrocyclone 1.
  • vanes or conveying elements 9 which extend essentially parallel to the generatrices of the rotor drum 6, are also attached to the outside of the rotor drum and possibly additionally to the inside, labeled 10.
  • the rotor drum in the region of the inlet 11 is closed at the end and openings 15 in the drum wall prevent substances from accumulating here.
  • the rotor drum still has supporting ribs 20 in the region of its end which is closed at the end.
  • the outlet openings 15 of the rotor drum are located behind them - seen in the axial direction.

Abstract

Der Hydrozyklon weist in seinem Eintrittsbereich eine zentrale Rotortrommel 6 auf, die mit ihrem den Schwerteilauslaß zugewandten, offenen Ende das sich am konischen Teil hin zum zylindrischen Teil erstreckende Gutstoffrohr 4 ein Stück überdeckt. Dadurch können die in den Fasersuspensionen enthaltenen Schwerteile besonders gut vom Gutstoffanteil der Fasersuspension abgeschieden werden, wobei die Konsistenzen zwischen 1,5 und 4% betragen.The hydrocyclone has in its inlet area a central rotor drum 6, which with its open end facing the heavy part outlet covers a part of the accept tube 4 which extends on the conical part towards the cylindrical part. As a result, the heavy parts contained in the fiber suspensions can be separated off particularly well from the proportion of acceptables in the fiber suspension, the consistencies being between 1.5 and 4%.

Description

Die Erfindung betrifft einen Hydrozyklon entsprechend dem Ober­begriff des Patentanspruchs 1. Ein solcher Zyklon ist bekannt aus der AT-PS 328 851. Bei diesem Hydrozyklon dient der Rotor dazu, durch den in ihm gebildeten Abzugskanal den abzuführenden Gutstoff in den Gutstoffraum zu leiten. Er weist an seinem Außenumfang Förderschaufeln auf, die die Wirbelströmung unter­stützen, wobei der tangentiale Einlaß in diesem Bereich vorge­sehen ist. Im allgemeinen liegt dieser oben in Zyklon, wobei dieser vorzugsweise senkrecht angeordnet wird. Der Schwer­schmutzabzug öffnet sich dementsprechend natürlicherweise im unteren Bereich. Durch diese Hydrozyklone soll verstärkt Schwer­schmutz abgeschieden werden. Der Arbeitsbereich solcher Zyklone liegt etwa im mittleren Konsistenzbereich zwischen 1,5 und 4%.The invention relates to a hydrocyclone according to the preamble of claim 1. Such a cyclone is known from AT-PS 328 851. In this hydrocyclone, the rotor is used to guide the good material to be discharged into the good material space through the discharge channel formed in it. It has conveyor blades on its outer circumference which support the eddy flow, the tangential inlet being provided in this area. In general, this is at the top of the cyclone, which is preferably arranged vertically. The heavy-duty drain opens naturally in the lower area. Heavy dirt is supposed to be separated by these hydrocyclones. The working range of such cyclones is approximately in the middle consistency range between 1.5 and 4%.

Wegen der hohen Stoffdichte ist die Abscheidung der Schwerstoffe relativ schlecht. Der Stoff hat gute Eigenschaften als Träger­medium und transportiert auch relativ große, schwere Teile in den Gutstoffbereich mit. Ferner ist eine direkte Kurzschlußbil­dung möglich, wenn der Rotor relativ flach ausgebildet ist, so daß der Hauptstrom direkt vom Zulauf zum Gutstoffrohr verläuft.Due to the high material density, the separation of heavy substances is relatively poor. The fabric has good properties as a carrier medium and also transports relatively large, heavy parts into the area of accepted fabrics. Furthermore, direct short-circuit formation is possible if the rotor is designed to be relatively flat, so that the main flow runs directly from the inlet to the accept tube.

Bei dem eingangs geschilderten Zyklon ist eine Umkehrströmung vom Einlaß zum Gutstoffrohr vorhanden, jedoch kann dadurch die Kurzschlußströmung nicht ausgeschlossen werden.In the case of the cyclone described at the outset, there is a reverse flow from the inlet to the accept tube, but the short-circuit flow cannot be ruled out as a result.

Die Aufgabe der Erfindung ist es, die Abscheidewirkung hinsicht­lich der Schwerteile eines solchen Zyklons erheblich zu verbes­sern.The object of the invention is to considerably improve the separation effect with regard to the heavy parts of such a cyclone.

Diese Aufgabe wird bei einem Hydrozyklon der eingangs genannten Art durch die Merkmale des kennzeichnenden Teils des Patentan­spruchs 1 gelöst.This object is achieved in a hydrocyclone of the type mentioned by the features of the characterizing part of patent claim 1.

Die Kurzschlußströmung ist hier weitgehend unterbunden, da die Schwerteile die scharfe Umlenkung nicht mitmachen können.The short-circuit flow is largely prevented here, since the heavy parts cannot take part in the sharp deflection.

Nachfolgend wird die Erfindung anhand der in den Figuren der Zeichnung dargestellten Ausführungsbeispiele erläutert; dabei stellt

  • Fig. 1. einen prinzipmäßigen Querschnitt durch einen er­findungsgemäßen Hydrozyklon, und
  • Fig. 2 und Fig. 3 jeweils prinzipiell einen entsprechenden Ausschnitt des Eintrittsbereichs von anderen Varianten des Hydrozyklons bzw. des Rotors dar.
The invention is explained below on the basis of the exemplary embodiments illustrated in the figures of the drawing; poses
  • 1 shows a basic cross section through a hydrocyclone according to the invention, and
  • FIGS. 2 and 3 each represent in principle a corresponding section of the inlet area of other variants of the hydrocyclone or of the rotor.

Bei dam dargestellten Hydxrozyklon 1 ist der Zulauf mit 11 be­zeichnet. Der in diesem Eintrittsbereich angeordnete, trommel­artig ausgebildete Rotor 6 wird von einer Welle 14 angetrieben. In diesem Bereich ist das Gehäuse des Hydrozyklons 1 im wesent­lichen zylindrisch, das sich danach - im allgemeinen nach unten hin - konisch zum Austrittsende für die Schwerteile hin ver­jüngt. Das Gutstoffabzugsrohr 4 ragt von diesem konischen Be­ reich nach oben und erstreckt sich ein Stück in die Rotortrommel 6 hinein, so daß seine Eintrittsöffnung 7 ein Stück von der Ro­tortrommel überdeckt ist. Die Überdeckung kann etwa zwischen 10 und 20 % des Innendurchmessers bzw. 5 bis 15 % der Gesamtlänge der Rotortrommel 6 betragen. Der Innendurchmesser der Rotortrom­mel 6 wird etwa zwischen 55 und 70 % des Innendurchmessers des zylindrischen Teils des Hydrozyklons 1 betragen.In the hydrocyclone 1 shown there, the inlet is designated by 11. The rotor 6, which is arranged in this entry area and is drum-like, is driven by a shaft 14. In this area, the housing of the hydrocyclone 1 is essentially cylindrical, which then tapers - generally downwards - towards the outlet end for the heavy parts. The Gutstoffabzugrohr 4 protrudes from this conical loading reaches upwards and extends a bit into the rotor drum 6 so that its inlet opening 7 is covered a bit by the rotor drum. The overlap can be approximately between 10 and 20% of the inner diameter or 5 to 15% of the total length of the rotor drum 6. The inner diameter of the rotor drum 6 will be approximately between 55 and 70% of the inner diameter of the cylindrical part of the hydrocyclone 1.

Im Übergangsbereich zwischen Rotortrommel und Eintrittsöffnung 7 des Gutstoffrohres 4 sind die Strömungsquerschnitte durch ring­förmige Verdickungen 12 und 13 von Gutstoffrohr 4 und Rotortrom­mel 6 verengt. Dadurch wird die Strömungsgeschwindigkeit ent­sprechend erhöht, so daß eine noch bessere Abscheidung der Schwerteile erzielt werden kann. Zwecks Verbesserung der Rotota­tionsströmung sind noch sich im wesentlichen parallel zur Erzeu­genden der Rotortrommel 6 erstreckende Flügel oder Förderelemen­te 9 außen an der Rotortrommel und eventuell noch zusätzlich innen, mit 10 gekennzeichnet, angebracht. Im Falle von Fig. 1 ist die Rotortrommel im Bereich des Zulaufes 11 stirnseitig ge­schlossen und Öffnungen 15 in der Trommelwand verhindern, daß sich hier Stoffe ansammeln. Ein Ansammeln zwischen der stirnsei­tigen Endwand der Rotortrommel und der Endwand des zylindrischen Teils des Hydrozyklons wird durch Förderelemente 17 verhindert, die als radiale Rippen ausgebildet sein können. Ferner kann man durch ein Zuleitungsrohr 19 für Spritzwasser die Ansammlung von Stoffen in diesem Bereich ebenfalls verhindern.In the transition area between the rotor drum and the inlet opening 7 of the material tube 4, the flow cross sections are narrowed by annular thickenings 12 and 13 of the material tube 4 and the rotor drum 6. This increases the flow velocity accordingly, so that even better separation of the heavy parts can be achieved. In order to improve the rotary flow, vanes or conveying elements 9, which extend essentially parallel to the generatrices of the rotor drum 6, are also attached to the outside of the rotor drum and possibly additionally to the inside, labeled 10. In the case of FIG. 1, the rotor drum in the region of the inlet 11 is closed at the end and openings 15 in the drum wall prevent substances from accumulating here. Accumulation between the front end wall of the rotor drum and the end wall of the cylindrical part of the hydrocyclone is prevented by conveyor elements 17, which can be designed as radial ribs. Furthermore, the accumulation of substances in this area can also be prevented by a feed pipe 19 for spray water.

Gemäß Fig. 2 weist die Rotortrommel im Bereich ihres stirnseitig geschlossenen Endes noch Tragrippen 20 auf. Die Auslaßöffnungen 15 der Rotortrommel befinden sich - in axialer Richtung gese­hen erst dahinter.According to FIG. 2, the rotor drum still has supporting ribs 20 in the region of its end which is closed at the end. The outlet openings 15 of the rotor drum are located behind them - seen in the axial direction.

Im Falle der Ausführungsform nach Fig. 3 sind ebensolche Trag­rippen 20′ vorgesehen, wobei der Rotor an beiden Stirnseiten offen ist und noch mittels der radialen Förderrippen 17′ an der Welle 14′ gehalten ist.In the case of the embodiment according to FIG. 3, such supporting ribs 20 'are provided, the rotor being open on both ends and still being held on the shaft 14' by means of the radial conveying ribs 17 '.

Claims (6)

1. Hydrozyklon mit einem sich im Bereich des am einen Ende be­findlichen Schwerschmutzauslasses durch konisch verjüngenden Teil und mit einem an seinem anderen Ende angeordneten Ro­tor, sowie einem zentralen Gutstoffabzugsrohr, dessen Ein­trittsöffnung sich im Rotorbereich befindet, dadurch gekenn­zeichnet, daß das Gutstoffabzugsrohr (4) sich im wesent­lichen zum Abzugsende des Zyklons für die Schwerteile hin erstreckt, wobei seine Eintrittsöffnung entgegensetzt ge­richtet ist, und der Rotor (5) im wesentlichen trommelartig ausgebildet ist, dessen am Eintrittsende des zentralen Gut­stoffabzugsrohrs (4) befindliches Ende stirnseitig offen ist und der das Eintrittsende (die Eintrittsöffnung 7) des Gut­stoffabzugsrohres (4) überdeckt.1. Hydrocyclone with a conical tapering part in the area of the heavy dirt outlet at one end and with a rotor arranged at its other end, and a central accept tube, the inlet opening of which is located in the rotor area, characterized in that the accept tube (4) extends essentially towards the withdrawal end of the cyclone for the heavy parts, its inlet opening being directed in the opposite direction, and the rotor (5) is essentially drum-shaped, the end of which is located at the inlet end of the central accept tube (4) is open on the front side and the inlet end ( covers the inlet opening 7) of the accept tube (4). 2. Hydrozyklon nach Anspruch 1, dadurch gekennzeichnet, daß der Rotor (5) an seinem Trommelumfang im wesentlichen sich parallel zur Erzeugenden der Trommel erstreckende Flügel oder Förderrippen oder - schaufeln (9) aufweist.2. Hydrocyclone according to claim 1, characterized in that the rotor (5) has on its drum circumference substantially parallel to the generatrix of the drum, wings or conveying ribs or blades (9). 3. Hydrozyklon nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Trommel (6) auch an ihrer inneren Wandung sich im wesentlichen parallel zur Trommelerzeugenden erstreckende Flügel oder - schaufeln (1) aufweist.3. Hydrocyclone according to claim 1 or 2, characterized in that the drum (6) also on its inner wall which extends substantially parallel to the drum-generating wing or blades (1). 4. Hydrozyklon nach einem der Ansprüche 1 bis 3, dadurch ge­kennzeichnet, daß das der Eintrittsöffnung des Hydrozyklons benachbarte Ende dere Rotortrommel (6) geschlossen ist.4. Hydrocyclone according to one of claims 1 to 3, characterized in that the inlet opening of the hydrocyclone adjacent end of the rotor drum (6) is closed. 5. Hydrozyklon nach einem der Ansprüche 1 bis 3, dadurch ge­kennzeichnet, daß das der Eintrittsöffnung des Hydrozyklons benachbarte Ende der Rotortrommel (6) gegen den im Hydrozyk­lon dort von der Rotortrommel (6) abgetrennten Außenraum (12) des Hydrozyklons abgestaut ist.5. Hydrocyclone according to one of claims 1 to 3, characterized in that the inlet opening of the hydrocyclone adjacent end of the rotor drum (6) against the there in the hydrocyclone from the rotor drum (6) separated outer space (12) of the hydrocyclone is blocked. 6. Hydrozyklon nach einem der Ansprüche 1 bis 5, dadurch ge­kennzeichnet, daß die Strömungsquerschnitte an dem Schwer­schmutzabzug zugeordneten, offenen Ende der Rotortrommel (6) sowohl gegen die Wandung des Hydrozyklons als auch gegen das Gutstoffabzugsrohr durch ringförmige Bauteile oder ringför­mige Verdickungen (12, 13) in diesem Bereich verengt sind.6. Hydrocyclone according to one of claims 1 to 5, characterized in that the flow cross-sections associated with the heavy dirt discharge, open end of the rotor drum (6) both against the wall of the hydrocyclone and against the accept tube through annular components or annular thickenings (12, 13th ) are narrowed in this area.
EP19880109818 1987-06-29 1988-06-21 Hydrocyclone Ceased EP0297386A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873721401 DE3721401A1 (en) 1987-06-29 1987-06-29 HYDROCYCLONE
DE3721401 1987-06-29

Publications (2)

Publication Number Publication Date
EP0297386A2 true EP0297386A2 (en) 1989-01-04
EP0297386A3 EP0297386A3 (en) 1990-10-10

Family

ID=6330494

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880109818 Ceased EP0297386A3 (en) 1987-06-29 1988-06-21 Hydrocyclone

Country Status (5)

Country Link
US (1) US4863605A (en)
EP (1) EP0297386A3 (en)
JP (1) JPS6434457A (en)
KR (1) KR890000156A (en)
DE (1) DE3721401A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021037876A1 (en) * 2019-08-28 2021-03-04 Khd Humboldt Wedag Gmbh Cyclone with rotating rod basket

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US5284250A (en) * 1991-09-13 1994-02-08 Stepenhoff Gary F Particle separation apparatus
US5263651A (en) * 1992-04-01 1993-11-23 Beloit Technologies, Inc. Safety device for chip conditioning device
US5427880A (en) * 1993-02-01 1995-06-27 Ricoh Company, Ltd. Electrophotographic Photoconductor
DE4326605A1 (en) * 1993-08-07 1995-02-09 Hosokawa Alpine Ag Method and device for separating a fine-grained solid into two grain fractions
DE29506015U1 (en) * 1995-04-07 1995-06-14 Hosokawa Alpine Ag Classification wheel for centrifugal wind classifiers
DE19811090A1 (en) 1998-03-13 1999-09-16 Georg Klas Cyclone separator for effluent household gray water
JP6240818B2 (en) * 2012-09-19 2017-11-29 弘雄 林 Air filter device, air intake device, and dust collecting device
CN113262561B (en) * 2021-07-05 2023-03-10 沈阳铝镁设计研究院有限公司 Fine seed slurry concentration device and method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021037876A1 (en) * 2019-08-28 2021-03-04 Khd Humboldt Wedag Gmbh Cyclone with rotating rod basket
CN114286724A (en) * 2019-08-28 2022-04-05 Khd洪保德韦达克有限公司 Cyclone separator with rotating rod-shaped cage

Also Published As

Publication number Publication date
DE3721401C2 (en) 1989-11-16
KR890000156A (en) 1989-03-13
DE3721401A1 (en) 1989-01-12
EP0297386A3 (en) 1990-10-10
JPS6434457A (en) 1989-02-03
US4863605A (en) 1989-09-05

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