EP0882514B1 - Dispositif de séparation - Google Patents

Dispositif de séparation Download PDF

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Publication number
EP0882514B1
EP0882514B1 EP98108738A EP98108738A EP0882514B1 EP 0882514 B1 EP0882514 B1 EP 0882514B1 EP 98108738 A EP98108738 A EP 98108738A EP 98108738 A EP98108738 A EP 98108738A EP 0882514 B1 EP0882514 B1 EP 0882514B1
Authority
EP
European Patent Office
Prior art keywords
separating chamber
suspension
inlet
outlet
fibrous material
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.)
Expired - Lifetime
Application number
EP98108738A
Other languages
German (de)
English (en)
Other versions
EP0882514A1 (fr
Inventor
James D. Livsey
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent 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 Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0882514A1 publication Critical patent/EP0882514A1/fr
Application granted granted Critical
Publication of EP0882514B1 publication Critical patent/EP0882514B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • 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
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • B04C2003/003—Shapes or dimensions of vortex chambers

Definitions

  • the invention relates to a separation device according to the preamble of Claim 1.
  • Such separation devices are usually also referred to as hydrocyclones. They are usually used to remove contaminants from liquid-solid suspensions, e.g. Remove fiber-water suspensions.
  • the suspension passes through a Inlet into the hydrocyclone, which is tangential to the inner wall of an elongated one extending deposition chamber leads.
  • the inlet pressure causes a high Entry speed, which is in a free fluid vortex with a central Heilkem is implemented within the chamber.
  • Centrifugal forces act on the Liquid and the solids and lead to a separation due to their different densities. Size and shape of the solid particles, geometry of the Hydrocyclones and the properties of the liquid also have a significant influence the effect of separation.
  • the hydrocyclone usually has at least two outlets the separation chamber with an outlet positioned to have an outflow flow the light fraction and the other allow outflow of the heavy fraction.
  • Many hydrocyclones are designed so that they are a heavy fraction from the suspension deposit.
  • Other hydrocyclones are designed to be a light fraction excrete from the suspension.
  • a hydrocyclone which is used for sorting aqueous Pulp is intended.
  • this is intended to remove parts from the suspension whose specific weight is less than that of water.
  • This known hydrocyclone has about halfway up an annular sedimentation chamber, which has a larger one Diameter than the remaining parts of the hydrocyclion, thereby eliminating them from heavy parts to possible. But it also acts as a barrier and increases it Flow resistance.
  • the invention has for its object a hydrocyclone with improved effect to create compared to the conventional hydrocyclones that are currently in the Are use.
  • Another object of the invention is in the processing of fiber-water suspensions a reduction in fiber losses in the reject.
  • Another goal of present invention is to provide higher throughput for a given To achieve pressure loss between the inlet and outlet of the hydrocyclone.
  • the hydrocyclone according to the invention is designed so that it separates contaminants, which are specifically lighter than the fiber-water suspension for paper production.
  • contaminants usually include many plastic parts, waxes and glue, which get into the pulp stream through the use of waste paper.
  • the hydrocyclone has a tubular housing that is elongated from the inlet end extends to the outlet end.
  • An inlet at the inlet end carries a stream of Fiber-water suspension tangentially into the housing, causing a vortex flow arises, which extends over the length of the suspension chamber to the outlet end extends.
  • the vortex flow separates the relatively light fraction from the relatively heavy faction.
  • the heavy fraction emerges from the separation chamber through the "Gutstoff” outlet and the light fraction through the "Rejekt” outlet.
  • Gutstoff- and rejek outlet are attached to the end of the separation chamber that the tangential inlet of the fiber-water suspension is opposite.
  • the separation chamber can be divided into one Inlet part, which extends from the tangential inlet to a central region, and that is along the longitudinal axis of the separation chamber and an outlet part which on the The middle section begins and extends to the end of the outlet.
  • the diameter of the Inlet part gradually increases from the inlet to the middle area, during the Diameter of the outlet part gradually from the middle area to the end of the outlet decreases.
  • the tubular housing defined by two truncated cones, the ends with the largest diameter are connected, the change in diameter in the separation chamber being linear.
  • the tubular housing is in cohesive sections divided, in which the diameter change of Separation chamber is not linear.
  • the device comprises a tubular housing 12 with a circular cross section, which the separation chamber 14th Are defined.
  • the separation chamber extends in the longitudinal direction from the inlet end 14a to Expiring 14 b.
  • An inlet 16 is tangential to the inlet end 14a of the separation chamber attached and connected to this.
  • a reject outlet 18 and an accept outlet 20 are arranged concentrically at the outlet end 14b of the separation chamber.
  • the Acceptance outlet 20 leads to an acceptance nozzle 22, the axis of which is either parallel or can be perpendicular to the longitudinal axis A of the separation chamber 14.
  • the reject outlet 18 leads to a reject nozzle 24, which is similar to the longitudinal axis A. can be arranged.
  • the housing 12 has an inlet part 12a, which from the inlet end 14a of the separation chamber to the central region 26 and an outlet part 12b which extends from the central region to the Leaving end 14b of the separation chamber leads.
  • the diameter of the separation chamber 14 in Inlet part 12a gradually increases from inlet end 14a to central region 26.
  • the diameter of the separation chamber in the outlet part 12b gradually increases Middle region 26 to the outlet end 14 b.
  • Inlet and outlet part 12a and 12b are formed by truncated cones, which with their larger diameter are connected to each other in the central area and at where the diameter changes linearly.
  • the fibrous suspension passes tangentially into the separation chamber at the inlet end 14a the inlet 16, a free vortex flow forming in the separation chamber.
  • the fibrous suspension moves in the longitudinal direction to the outlet end 14b, whereby it first passes the inlet part 12a and then the outlet part 12b.
  • the light fraction of the Fibrous suspension is the separation chamber through the reject outlet 18 and thus leave connected reject nozzle 24.
  • the design of the housing and the separation chamber described above has one Improved effectiveness compared to conventional hydrocyclones, where the separation chamber has either cylindrical inlet parts or separation chambers Diameters that are constantly smaller at the outlet end.
  • a special feature of the present invention is the possibility of loss to reduce useful paper fibers in the reject outlet.
  • a higher one Throughput at a given pressure difference between the inlet and the accept outlet be made possible.
  • Fig. 2 is a section similar to Fig. 1, which shows another embodiment of the subject matter of the invention shows in the inlet part 112 a and outlet part 112 b of the Housing 112 are curved to a gradual non-linear change in the To produce diameter of the separation chamber 14.
  • Fig. 3 shows another embodiment of the invention, in the inlet and Outlet part 212 a and 212 b have different curve shapes, but again not there are linear changes in the diameter of the separation chamber 14.
  • FIGS. 1 to 3 are different Have design, they have a common feature, namely that the The diameter of the separation chamber in the central area is larger compared to that Diameters at the inlet or outlet end.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cyclones (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Claims (5)

  1. Dispositif de séparation d'une fraction légère d'une suspension de matière fibreuse et d'une fraction lourde de la suspension de matière fibreuse, lequel dispositif comporte un corps (12) de forme tubulaire et de section transversale circulaire, qui forme une chambre de séparation (14), laquelle s'étend dans la direction longitudinale depuis l'extrémité d'entrée (14a) jusqu'à l'extrémité de sortie (14b), le corps (12) comportant une entrée (16) à ladite extrémité d'entrée (14a) pour l'introduction tangentielle du flux de la suspension de matière fibreuse dans ledit corps (12), afin de produire un écoulement tourbillonnant le long de la longueur de la chambre de séparation (14), en direction de l'extrémité de sortie (14b), l'écoulement tourbillonnant provoquant un effet de séparation qui sépare la fraction relativement plus légère d'une fraction relativement plus lourde, le corps (12) présentant au moins deux sorties à l'extrémité de sortie (14b) dont une sortie est disposée de manière qu'à travers celle-ci puisse sortir la fraction relativement plus légère et l'autre sortie est disposée de manière qu'à travers celle-ci puisse sortir la fraction-relativement plus lourde, caractérisé en ce que le diamètre de la chambre de séparation (14) augmente progressivement depuis l'extrémité d'entrée (14a) jusqu'à une zone centrale (26) et diminue progressivement depuis la zone centrale (26) jusqu'à l'extrémité de sortie (14b).
  2. Dispositif selon la revendication 1, caractérisé en ce que les variations du diamètre sont linéaires.
  3. Dispositif selon la revendication 1, caractérisé en ce que les variations du diamètre de la chambre de séparation (14) sont non-linéaires.
  4. Dispositif selon la revendication 1, caractérisé en ce que le corps est défini par deux troncs de cône creux qui sont reliés entre eux dans la zone centrale (26).
  5. Hydrocyclone pour la séparation légère d'une suspension de matière fibreuse et d'une fraction lourde de cette suspension, qui comprend les éléments suivants :
    une chambre de séparation (14),
    une entrée (16) à l'extrémité d'entrée (14a) de la chambre de séparation (14) pour introduire ladite suspension de matière fibreuse dans la chambre de séparation (14) et au moins deux sorties qui sont disposées à l'extrémité de sortie (14b) de la chambre de séparation (14), opposée à l'extrémité d'entrée (14a), pour extraire les fractions séparées de la suspension de matière fibreuse, caractérisé en ce que le diamètre de la chambre de séparation (14) augmente progressivement depuis l'extrémité d'entrée (14a) vers une zone centrale (26) de la chambre de séparation (14) et diminue ensuite progressivement depuis la zone centrale (26) de la chambre de séparation (14) vers l'extrémité de sortie (14b).
EP98108738A 1997-06-04 1998-05-14 Dispositif de séparation Expired - Lifetime EP0882514B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US868628 1997-06-04
US08/868,628 US5899342A (en) 1997-06-04 1997-06-04 Hydrocyclone separator

Publications (2)

Publication Number Publication Date
EP0882514A1 EP0882514A1 (fr) 1998-12-09
EP0882514B1 true EP0882514B1 (fr) 2002-01-30

Family

ID=25352043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98108738A Expired - Lifetime EP0882514B1 (fr) 1997-06-04 1998-05-14 Dispositif de séparation

Country Status (4)

Country Link
US (1) US5899342A (fr)
EP (1) EP0882514B1 (fr)
CA (1) CA2235011C (fr)
DE (1) DE59802941D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU767862B2 (en) * 1999-05-10 2003-11-27 Mineral Processors (Wa) Pty Ltd Densifier
US6116429A (en) * 1999-06-23 2000-09-12 Kirsgalvis; Richard D. Filter housing extension kit
EP3238829A1 (fr) * 2016-04-25 2017-11-01 Bosch Termoteknik Isitma ve Klima Sanayi Ticaret Anonim Sirketi Séparateur cyclonique
CN106166518A (zh) * 2016-08-22 2016-11-30 江苏金点环保科技有限公司 一种动态水力旋流器

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518084A (en) * 1945-07-23 1950-08-08 Charles W Smith Apparatus for separating relatively heavy particles from liquid
US2655263A (en) * 1950-10-12 1953-10-13 Ferros Metals Res Company Ltd Ore pulp concentrator
GB1209686A (en) * 1967-09-22 1970-10-21 Papcel Celulosy Np Improvements in or relating to vortical cleaner
US3620370A (en) * 1969-06-02 1971-11-16 Rue E Swayze Ore concentrator
DE2622880C3 (de) * 1976-05-21 1981-05-14 Amberger Kaolinwerke Gmbh, 8452 Hirschau Verfahren zum fraktionierten von suspendierten Feststoffen mittels Hydrozyklonen, sowie Anordnung zur Durchführung des Verfahrens
SE406713B (sv) * 1977-07-18 1979-02-26 Celleco Ab Hydrocykloseparator med ledskena i separeringskammarens cirkulercylindriska del
US4394138A (en) * 1979-01-19 1983-07-19 Schilling John R Diverging vortex separator
JPS55114364A (en) * 1979-02-26 1980-09-03 Mitsui Eng & Shipbuild Co Ltd Axial flow type cyclon
CS206478B1 (en) * 1979-12-12 1981-06-30 Rudolf Kmeco Vertical turbulent sorter for sorting paper stock,especially for sorting foamed polystyrene granules
DE3024837C2 (de) * 1980-07-01 1985-07-04 Ishikawajima-Harima Jukogyo K.K., Tokio/Tokyo Teilchenabscheider mit vertikaler Achse
DE8521904U1 (de) * 1985-07-30 1985-12-05 Czernawski, Norbert, 6140 Bensheim Schleuderkammer, zum Ausschleudern unzerstäubter Flüssigkeitspartikel aus zentrischen Wirbeln
EP0618012B1 (fr) * 1993-04-02 1996-09-18 J.M. Voith GmbH Dispositif de flottation
DE4426159A1 (de) * 1994-07-22 1994-12-08 Voith Gmbh J M Flotationseinrichtung

Also Published As

Publication number Publication date
US5899342A (en) 1999-05-04
DE59802941D1 (de) 2002-03-14
CA2235011A1 (fr) 1998-12-04
CA2235011C (fr) 2003-10-14
EP0882514A1 (fr) 1998-12-09

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