EP0616853A1 - Hydrocyclone - Google Patents

Hydrocyclone Download PDF

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Publication number
EP0616853A1
EP0616853A1 EP94103498A EP94103498A EP0616853A1 EP 0616853 A1 EP0616853 A1 EP 0616853A1 EP 94103498 A EP94103498 A EP 94103498A EP 94103498 A EP94103498 A EP 94103498A EP 0616853 A1 EP0616853 A1 EP 0616853A1
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EP
European Patent Office
Prior art keywords
dip tube
hydrocyclone
hydrocyclone according
tube
blade
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
EP94103498A
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German (de)
French (fr)
Other versions
EP0616853B1 (en
Inventor
Michael Jerabek
Wolfgang Ruf
Thomas Martin
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
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JM Voith GmbH
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Filing date
Publication date
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0616853A1 publication Critical patent/EP0616853A1/en
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Publication of EP0616853B1 publication Critical patent/EP0616853B1/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B04C5/081—Shapes or dimensions
    • 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
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
    • B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
    • 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
    • B04C5/24—Multiple arrangement thereof
    • 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
    • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
    • B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
    • B04C2005/136—Baffles in the vortex finder

Definitions

  • the invention relates to a hydrocyclone according to the preamble of claim 1.
  • a hydrocyclone is known from DE-AS-1 072 024.
  • the blades of the guide device arranged in the dip tube have an arcuate leading edge.
  • the blades should be simply curved plates.
  • the arcuate design of the leading edges of the blades is currently not used.
  • other aspects have proven to be essential.
  • dip tube it is also not necessary for the dip tube to have any conical shape, but a straight dip tube is advantageous according to the invention, at least because it is easier to manufacture in terms of production technology.
  • FIG. 1 shows a first schematic sketch in axial section
  • FIG. 2 shows a similar sketch of another embodiment
  • FIG. 3 shows a detail of FIG. 1 in relation to the guide apparatus and the inlet area of the dip tube.
  • the hydrocyclone 1 is shown with a tangential inflow tube 2, the conical lower part 12, which is only indicated in broken lines here, and with a central immersion tube 3 projecting from above into the entry area of the cyclone the leading edge of the guide device 5 is arranged with the guide blades 7.
  • the distance of the guide apparatus - that is to say the leading edge of the blades 7 - from the leading edge of the dip tube 3 is at least equal to half the inner diameter of the dip tube.
  • the inner diameter of the immersion tube is 50 mm, the minimum distance is approximately 25 mm. It has been found that this enables the guide apparatus to function properly because disruptive edge currents are evaded at the inlet area of the dip tube.
  • the guide apparatus according to FIG. 2 should preferably have blades 7 sharpened in the entry region, which blades may run with their radially inner edge, for example, following a parabolic curve - based on a branch thereof. The curvature of the blades decreases from the inlet area to the outlet end of the guide apparatus, so that they finally run flat and straight, corresponding to a radial plane of the hydrocyclone drawn through them.
  • an additional gas discharge pipe 6 ' is provided centrally in and concentrically with the dip pipe 3, this time a somewhat larger distance of the guide apparatus from the inlet end of the gas pipe is chosen, which is approximately equal to the inside pipe diameter and preferably at least 170% of the inside pipe diameter is. This is approximately considered a minimum distance.
  • the leading edge of the dip tube 3 is rounded, approximately with a radius of curvature between 0.65 times and 0.9 times the wall thickness s of the dip tube 3.
  • this is also a thickening 10 , which is preferably located at least partially within the dip tube.

Abstract

A wet cyclone having a slender body with a truncated cone at an end thereof includes a heavy fraction outlet at an apex of the truncated cone and an immersion tube on the other end of the body. The immersion tube is cylindrical for withdrawal of a light non-gaseous fraction. A diffuser within the immersion tube deflects the flow within the tube for recovery of pressure head. The diffuser is disposed at a distance from the inlet end of the immersion tube of at least about half the inside diameter of the immersion tube.

Description

Die Erfindung betrifft einen Hydrozyklon entsprechend dem Oberbegriff des Patentanspruchs 1. Ein solcher Hydrozyklon ist bekannt aus DE-AS-1 072 024. Bei diesem Hydrozyklon ist vorgesehen, daß die Schaufeln des im Tauchrohr angeordneten Leitapparates eine bogenförmige Eintrittskante haben. Ferner sollen die Schaufeln einfach gekrümmte Platten sein. Erfindungsgemäß wird die bogenförmige Ausbildung der Eintrittskanten der Schaufeln gerade nicht verwendet. Für den hauptsächlich vorgesehenen Anwendungszweck bei Fasersuspensionen haben sich andere Gesichtspunkte als wesentlich herausgestellt.The invention relates to a hydrocyclone according to the preamble of claim 1. Such a hydrocyclone is known from DE-AS-1 072 024. In this hydrocyclone it is provided that the blades of the guide device arranged in the dip tube have an arcuate leading edge. Furthermore, the blades should be simply curved plates. According to the invention, the arcuate design of the leading edges of the blades is currently not used. For the main intended application in fiber suspensions, other aspects have proven to be essential.

Ferner ist es auch nicht nötig, daß das Tauchrohr eine irgendwie geartete konische Form hat, sondern ein gerades Tauchrohr ist erfindungsgemäß von Vorteil, zumindest weil es fertigungstechnisch einfacher herzustellen ist.Furthermore, it is also not necessary for the dip tube to have any conical shape, but a straight dip tube is advantageous according to the invention, at least because it is easier to manufacture in terms of production technology.

Nachfolgend wird die Erfindung der in den Figuren der Zeichnung dargestellten Ausführungsbeispiele erläutert. Dabei stellt Figur 1 eine erste schematische Skizze im Axialschnitt, Figur 2 eine ähnliche Skizze einer anderen Ausführungsform und Figur 3 eine Einzelheit von Figur 1 in Bezug auf den Leitapparat und den Eintrittsbereich des Tauchrohres dar.The invention of the exemplary embodiments illustrated in the figures of the drawing is explained below. 1 shows a first schematic sketch in axial section, FIG. 2 shows a similar sketch of another embodiment, and FIG. 3 shows a detail of FIG. 1 in relation to the guide apparatus and the inlet area of the dip tube.

In Figur 1 ist der Hydrozyklon 1 dargestellt mit tangentialem Einströmrohr 2, dem konischen Unterteil 12, das hier nur gebrochen angedeutet ist, sowie mit einem zentralen, von oben in den Eintrittsbereich des Zyklons hineinragenden Tauchrohr 3. Innerhalb des Tauchrohrs ist in einem bestimmten Abstand von dessen Eintrittskante der Leitapparat 5 mit den Leitschaufeln 7 angeordnet. Der Abstand des Leitapparats - also der Eintrittskante der Schaufeln 7 - von der Eintrittskante des Tauchrohrs 3 ist mindestens gleich dem halben Tauchrohrinnendurchmesser.In FIG. 1, the hydrocyclone 1 is shown with a tangential inflow tube 2, the conical lower part 12, which is only indicated in broken lines here, and with a central immersion tube 3 projecting from above into the entry area of the cyclone the leading edge of the guide device 5 is arranged with the guide blades 7. The distance of the guide apparatus - that is to say the leading edge of the blades 7 - from the leading edge of the dip tube 3 is at least equal to half the inner diameter of the dip tube.

Beträgt z.B. der Innendurchmesser des Tauchrohrs 50 mm, so ist der Mindestabstand mit 25 mm etwa anzusetzen. Es hat sich herausgestellt, daß auf diese Weise eine einwandfreie Wirkungsweise des Leitapparats ermöglicht wird, weil störenden Randströmungen am Eintrittsbereich des Tauchrohres ausgewichen wird. Für den vorgesehenen Zweck sollte vorzugsweise der Leitapparat entsprechend Figur 2 im Eintrittsbereich angespitzte Schaufeln 7 aufweisen, die etwa nach einer parabelförmigen Kurve - bezogen auf einen Ast derselben - mit ihrer radial inneren Kante verlaufen können. Die Krümmung der Schaufeln nimmt vom Eintrittsbereich zum Austrittsende des Leitapparats ab, so daß sie schließlich eben und gerade verlaufen, entsprechend einer durch sie gezogenen Radialebene des Hydrozyklons. Man braucht nicht sehr viele Schaufeln anzuwenden - wie es auch aus der eingangs erwähnten Schrift nach dem Stand der Technik bekannt ist - so daß etwa ein Abstand von einem Viertel des Innenumfangs des Tauchrohrs genügt. Das bedeutet natürlich, daß der Leitapparat 5 etwa vier Schaufeln 7 aufweist.For example, the inner diameter of the immersion tube is 50 mm, the minimum distance is approximately 25 mm. It has been found that this enables the guide apparatus to function properly because disruptive edge currents are evaded at the inlet area of the dip tube. For the intended purpose, the guide apparatus according to FIG. 2 should preferably have blades 7 sharpened in the entry region, which blades may run with their radially inner edge, for example, following a parabolic curve - based on a branch thereof. The curvature of the blades decreases from the inlet area to the outlet end of the guide apparatus, so that they finally run flat and straight, corresponding to a radial plane of the hydrocyclone drawn through them. You do not need to use very many blades - as is also known from the above-mentioned prior art - so that a distance of a quarter of the inner circumference of the dip tube is sufficient. Of course, this means that the guide device 5 has about four blades 7.

Im Fall von Figur 2 ist ein zusätzliches Gasabfuhrrohr 6' zentral im und konzentrisch zum Tauchrohr 3 vorgesehen, wobei diesmal ein etwas größerer Abstand des Leitapparats vom Eintrittsende des Gasrohres gewählt ist, der etwa gleich dem Tauchrohr-Innendurchmesser ist und vorzugsweise mindestens 170 % des Tauchrohrinnendurchmessers beträgt. Dies wird ungefähr als ein Mindestabstand angesehen.In the case of FIG. 2, an additional gas discharge pipe 6 'is provided centrally in and concentrically with the dip pipe 3, this time a somewhat larger distance of the guide apparatus from the inlet end of the gas pipe is chosen, which is approximately equal to the inside pipe diameter and preferably at least 170% of the inside pipe diameter is. This is approximately considered a minimum distance.

In Figur 3 ist erkennbar, daß die Eintrittskante des Tauchrohrs 3 abgerundet ausgeführt ist, und zwar etwa mit einem Abrundungsradius zwischen dem 0,65-fachen und dem 0,9-fachen der Wandstärke s des Tauchrohrs 3. Vorzugsweise ist dies auch eine Verdickung 10, die sich vorzugsweise mindestens zum Teil innerhalb des Tauchrohrs befindet. Hierdurch kann den Sekundärströmungen im Eintrittsbereich des Tauchrohrs in erheblichem Maße begegnet werden.In Figure 3 it can be seen that the leading edge of the dip tube 3 is rounded, approximately with a radius of curvature between 0.65 times and 0.9 times the wall thickness s of the dip tube 3. Preferably, this is also a thickening 10 , which is preferably located at least partially within the dip tube. As a result, the secondary flows in the inlet area of the dip tube can be countered to a considerable extent.

Insgesamt ergibt sich mit den geschilderten Maßnahmen auch eine nicht zu große Länge des Tauchrohrs wegen der Einbauten desselben, so daß zusätzliche Reibungsverluste nicht auftreten. Die genannten Mindestabstände sind in den Figuren mit lmin angegeben.Overall, the measures described also result in the immersion tube not being too large in length because of the internals thereof, so that additional friction losses do not occur. The minimum distances mentioned are indicated in the figures as 1 min .

Claims (9)

Hydrozyklon, vorzugsweise mit einem schlanken, kegelförmigen Hauptteil des Zyklonkörpers mit dem Auslaßende einer Schwerfraktion an der Kegelstumpfspitze und mit einem Tauchrohr am anderen Ende des Zyklons, das vorzugsweise zylindrisch ausgebildet ist, zur Abfuhr von einer Leichtfraktion, die im wesentlichen nicht Gas ist, sowie mit einem Leitapparat innerhalb des Tauchrohres zur Ablenkung der Strömung innerhalb desselben zwecks Rückgewinnung von Druckhöhe, dadurch gekennzeichnet, daß der Leitapparat (5) in einem Mindestabstand vom Eintrittsende des Tauchrohrs (3) von dem halben Innendurchmesser des Tauchrohrs (3) angeordnet ist.Hydrocyclone, preferably with a slim, conical main part of the cyclone body with the outlet end of a heavy fraction at the truncated cone tip and with a dip tube at the other end of the cyclone, which is preferably cylindrical, for the removal of a light fraction, which is essentially not gas, and with a guide device inside the dip tube for deflecting the flow within the same for the purpose of recovering pressure head, characterized in that the guide device (5) is arranged at a minimum distance from the inlet end of the dip tube (3) from half the inner diameter of the dip tube (3). Hydrozyklon nach Anspruch 1, mit einem zusätzlichen, konzentrisch zum Tauchrohr und innerhalb desselben angeordneten Gasabzugsrohr (6), dadurch gekennzeichnet, daß der Abstand des Leitapparats (5) von der Eintrittsöffnung des Gasrohres (6) mindestens einen, vorzugsweise mindestens das 1,7-fache des Tauchrohrinnendurchmessers beträgt.Hydrocyclone according to Claim 1, with an additional gas discharge pipe (6) arranged concentrically to the immersion pipe and within the same, characterized in that the distance of the guide apparatus (5) from the inlet opening of the gas pipe (6) is at least one, preferably at least 1.7 times the inner tube diameter. Hydrozyklon nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die radiale Erstreckung (Schaufelbreite) der Schaufeln (7) des Leitapparats (5) 15-30 % und im Fall des zusätzlichen zentralen Gasrohrs (6) zwischen 15 und 20 % des Tauchrohrinnendurchmessers beträgt.Hydrocyclone according to Claim 1 or 2, characterized in that the radial extent (blade width) of the blades (7) of the guide apparatus (5) is 15-30% and in the case of the additional central gas tube (6) between 15 and 20% of the inner diameter of the dip tube. Hydrozyklon nach einem der Ansprüche 1-3, gekennzeichnet durch eine Abrundung der Eintrittskante des Tauchrohrs (6) mit einem Radius zwischen dem 0,65-fachen und 0,9-fachen der Wandstärke des Tauchrohrs (6).Hydrocyclone according to one of Claims 1-3, characterized by a rounding of the leading edge of the dip tube (6) with a radius between 0.65 times and 0.9 times the wall thickness of the dip tube (6). Hydrozyklon nach einem der Ansprüche 1-4, gekennzeichnet durch eine umlaufende, abgerundete Verdickung (10) an der Eintrittskante des Tauchrohrs (6).Hydrocyclone according to one of claims 1-4, characterized by a circumferential, rounded thickening (10) at the leading edge of the dip tube (6). Hydrozyklon nach Anspruch 5, dadurch gekennzeichnet, daß sich die Verdickung (10) zumindest teilweise im Inneren des Tauchrohrs (6) befindet.Hydrocyclone according to claim 5, characterized in that the thickening (10) is at least partially in the interior of the dip tube (6). Hydrozyklon nach einem der Ansprüche 1-6, gekennzeichnet durch eine die Schaufelbreite am Anfang (Einströmende) der Schaufel (7) auf eine Breite von 0 herabsetzende Verschmälerung der Schaufel (7) über eine Länge derselben bis zu 20 % des Tauchrohrinnendurchmessers.Hydrocyclone according to one of Claims 1-6, characterized by a narrowing of the blade (7) which reduces the blade width at the beginning (inflow end) of the blade (7) to a width of 0 over a length thereof of up to 20% of the inner diameter of the dip tube. Hydrozyklon nach Anspruch 7, derart gekennzeichnet, daß die Verschmälerung in Form eines Astes oder eines Ausschnittes des Astes einer Parabel oder Hyperbel erfolgt.Hydrocyclone according to Claim 7, characterized in that the narrowing takes place in the form of a branch or a section of the branch of a parabola or hyperbola. Hydrozyklon nach einem der Ansprüche 1-8, dadurch gekennzeichnet, daß der Leitapparat einfach gekrümmte Schaufeln (7) zum stoßfreien Auftreffen der Strömung am Anfang (Eintrittsbereich des Leitapparats 5) mit in Richtung stromabwärts abnehmender Krümmung bzw. Neigung gegen die durch die Schaufeln gehenden Radialebenen des Zyklons vorgesehen sind, wobei die Krümmung sich verringert bis hin zu einem geraden Verlauf der Schaufel (7) an ihrem Austrittsende, und sie mit diesem Austrittsende in einer entsprechenden Radialebene des Hydrozyklons liegen.Hydrocyclone according to one of Claims 1-8, characterized in that the guide device has single-curved blades (7) for impact-free impingement of the flow at the beginning (inlet area of guide device 5) with a curvature or inclination that decreases in the direction downstream from the radial planes passing through the blades of the cyclone are provided, the curvature decreasing to a straight course of the blade (7) at its outlet end, and with this outlet end they lie in a corresponding radial plane of the hydrocyclone.
EP94103498A 1993-03-26 1994-03-08 Hydrocyclone Expired - Lifetime EP0616853B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4309920 1993-03-26
DE4309920A DE4309920A1 (en) 1993-03-26 1993-03-26 Hydro-cyclone separator with central outlet tube for lighter fraction - which has internal guide vanes at a distance from end equal to half diameter of tube.

Publications (2)

Publication Number Publication Date
EP0616853A1 true EP0616853A1 (en) 1994-09-28
EP0616853B1 EP0616853B1 (en) 1997-10-22

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EP94103498A Expired - Lifetime EP0616853B1 (en) 1993-03-26 1994-03-08 Hydrocyclone

Country Status (9)

Country Link
US (1) US5466372A (en)
EP (1) EP0616853B1 (en)
JP (1) JPH07864A (en)
KR (1) KR940021128A (en)
AT (1) ATE159434T1 (en)
BR (1) BR9400884A (en)
DE (2) DE4309920A1 (en)
FI (1) FI941416A (en)
TW (1) TW285646B (en)

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GB2354724B (en) * 1997-03-24 2001-09-05 Vision Almet Ltd Moisture separator for digester gases and landfill gases and raw natural gases
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GB2425078B (en) * 2004-08-23 2008-03-26 Samsung Kwangju Electronics Co Cyclonic separating apparatus
KR100592096B1 (en) * 2004-10-08 2006-06-22 삼성광주전자 주식회사 Cyclone dust collector
US20070235090A1 (en) * 2006-04-10 2007-10-11 David Thompson Fluid processing system
FR2908673B1 (en) * 2006-11-20 2009-11-06 Fcb Ciment Sa APPARATUS FOR SELECTING GRANULOMETRIC AND / OR DRYING MATERIAL.
DE102009016045A1 (en) 2009-04-02 2010-10-07 Linde Aktiengesellschaft Flux guiding device for immersion pipe of cyclone filter, has multiple flux guiding blades which have flat upper section that lies in longitudinal section plane of immersion pipe
AT512151B1 (en) * 2012-05-24 2013-06-15 A Tec Holding Gmbh Device for separating substances from a medium
CN102886316B (en) * 2012-09-18 2014-07-02 东北石油大学 Hydrocyclone used for three-phase medium separation
CN103752426B (en) * 2014-01-22 2016-11-09 太原理工大学 Cyclone on-line control device based on overflow pipe
US9700186B2 (en) 2014-01-30 2017-07-11 Vista Outdoor Operations Llc Portable vacuuming device for collecting and neutralizing flammable residue
EP3184178B1 (en) * 2015-12-23 2018-10-17 J. Wagner AG Powder coating equipment for coating workpieces
WO2019146100A1 (en) * 2018-01-29 2019-08-01 三菱電機株式会社 Oil separator, compressor and refrigeration cycle device
CN113182086B (en) * 2021-05-19 2023-02-07 重庆工商大学 Emulsion breaking and dewatering separation method for emulsion
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Title
AU-A-75100/74 (UNIVERSITY OF MELBOURNE) *
PATENT ABSTRACTS OF JAPAN vol. 2, no. 14 (M - 77)<7007> 30 January 1978 (1978-01-30) *
PATENT ABSTRACTS OF JAPAN vol. 2, no. 30 (M - 77)<7887> 24 February 1978 (1978-02-24) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005110608A1 (en) * 2004-05-12 2005-11-24 Dyson Technology Limited Cyclonic separating apparatus
US7637991B2 (en) 2004-05-12 2009-12-29 Dyson Technology Limited Cyclonic separating apparatus
KR101159555B1 (en) * 2004-05-12 2012-06-25 다이슨 테크놀러지 리미티드 Cyclonic separating apparatus
FR2874315A1 (en) * 2004-08-23 2006-02-24 Samsung Kwangju Electronics Co Cyclonic separating device for use in vacuum cleaner, has noise reduction ribs which are mounted in air exhaust tube in whirlpool chamber and that project on lower wall of exhaust tube
US7410535B2 (en) 2004-08-23 2008-08-12 Samsung Gwangju Electronics Co., Ltd. Cyclone separating apparatus and a vacuum cleaner having the same

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EP0616853B1 (en) 1997-10-22
BR9400884A (en) 1994-11-08
KR940021128A (en) 1994-10-17
ATE159434T1 (en) 1997-11-15
FI941416A0 (en) 1994-03-25
DE4309920A1 (en) 1993-08-26
FI941416A (en) 1994-09-27
JPH07864A (en) 1995-01-06
TW285646B (en) 1996-09-11
US5466372A (en) 1995-11-14
DE59404379D1 (en) 1997-11-27

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