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WO2006032427A1 - Procede pour fractionner une suspension aqueuse de fibres a papier et hydrocyclone pour la mise en oeuvre dudit procede - Google Patents

Procede pour fractionner une suspension aqueuse de fibres a papier et hydrocyclone pour la mise en oeuvre dudit procede Download PDF

Info

Publication number
WO2006032427A1
WO2006032427A1 PCT/EP2005/010064 EP2005010064W WO2006032427A1 WO 2006032427 A1 WO2006032427 A1 WO 2006032427A1 EP 2005010064 W EP2005010064 W EP 2005010064W WO 2006032427 A1 WO2006032427 A1 WO 2006032427A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydrocyclone
annular space
fibers
inlet
suspension
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
PCT/EP2005/010064
Other languages
German (de)
English (en)
Inventor
Martin Kemper
Bo Norman
Jan Christer Sandberg
Jonas BERGSTRÖM
Ko Jordan
Hannes Vomhoff
Wolfgang Mannes
Torsten Paul
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 Patent GmbH
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 Patent GmbH, Voith Paper Patent GmbH filed Critical Voith Patent GmbH
Priority to JP2007532813A priority Critical patent/JP2008513625A/ja
Priority to DE502005006168T priority patent/DE502005006168D1/de
Priority to EP05790369A priority patent/EP1799903B1/fr
Publication of WO2006032427A1 publication Critical patent/WO2006032427A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B04C3/06—Construction of inlets or outlets to the vortex chamber
    • 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

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a hydrocyclone for carrying out the method according to the preamble of claim 21.
  • hydrocyclones which can generate high centrifugal forces due to their geometric design, in particular in the range of over 400 times the acceleration of gravity ("400 g"). Highly effective cleaners bring it up to 1000 g.
  • the invention is based on the object to improve the known methods so that with them an even higher separation effect is achieved.
  • the operation should also provide good results for such processes of relatively high consistency.
  • the effect of the method according to the invention is based essentially on the fact that the added paper fiber suspension must flow through an increasingly narrowing chamber in its flow path through the hydrocyclone after a few revolutions in the inlet region. It can be assumed that this loosens the cohesion of the fiber suspension, so that adjacent fibers can more easily separate from each other, which increases their mobility relative to each other. This enhances the effect of the attacking centrifugal forces, favoring fractionation.
  • the annular gap has a small radial gap width.
  • all parts of the suspension have approximately the same radial distance from the walls of the hydrocyclone. That is, the radial starting position for fractionation is virtually the same for all parts of the suspension.
  • the paper fiber suspension can be diluted in the region of the bottleneck by the addition of, for example, backwater, which increases the separating effect of the hydrocyclone for the reasons already explained.
  • the dilution liquid is advantageously so supplied that flow rate and direction at the mixing point as possible correspond to the paper fiber suspension.
  • Figure 1 shows a hydrocyclone for explaining the method according to the invention in side view, cut.
  • FIG. 1 shows in schematic form a hydrocyclone suitable for carrying out the process. This consists essentially of a cylindrical separation chamber with an inner wall 14 and has an inlet end 2 and an outlet end 3. By an inlet end 2 arranged inlet 10, the paper fiber suspension S is introduced and set in rotation (tangential inlet).
  • this hydrocyclone has an annular dilution chamber 12, which opens in the region of the constriction 8 in the interior of the hydrocyclone with an annular gap.
  • a dilution water feed 11 is connected to this dilution chamber 12.
  • a rotational flow can be generated in the dilution chamber 12, which has the same direction of rotation as the rotational flow of the paper fiber suspension, resulting in a gentle admixture.
  • the formed light fraction L is discharged at the outlet end 3 of the hydrocyclone by a light material discharge 6, which is designed here as centrally projecting into the hydrocyclone tube.
  • the heavy fraction H which accumulates on the inner wall 14 of the hydrocyclone, can be led out of the hydrocyclone by the heavy material discharge 7.
  • Such Schwerteilaustrag 7 may be arranged radially, tangentially or axially.
  • a displacement body 1 which is externally provided with surfaces which serve as boundaries for the first annular space 4 and the second annular space 5.
  • a constriction first annulus 4
  • an extension second annulus 5
  • the displacement body 1 initially (upstream) a in the flow direction expanding and downstream in Flow direction constricting conical surface.
  • the conical surface of the displacement body can be varied as required, to which Fig. 2 shows an example of a displacement body which is provided upstream with a conical surface 18 and downstream with a convex surface 19.
  • the displacement body according to FIG. 3 has a concave surface 20 in its downstream region, while that in FIG. 4 is again provided with two conical surfaces 18, 18 ' , wherein at the transition of these two surfaces there is a shoulder 17 leading to it in that, at this transition point, the diameter of the displacement body decreases suddenly in the direction of flow. This can form a particularly advantageous flow when used in the hydrocyclone in the constriction.
  • a first inventive hydrocyclone is connected to a second hydrocyclone according to the invention by using the heavy fraction H of the first hydrocyclone as feed for the second hydrocyclone.
  • the light fractions L produced in both stages can be brought together if they have a comparable quality.
  • the heavy fraction H ' obtained in the second stage then contains, to an even greater extent, the proportions desired therein.
  • such fractionation processes tend to mean that the heavy fraction H has a higher consistency than the inlet. In the circuit shown in FIG. 6, this can be very easily compensated for by supplying a correspondingly matched amount of dilution liquid W, so that the second hydrocyclone can also be operated with optimum run-in consistency.
  • the variant of the hydrocyclone according to the invention shown in Fig. 8 differs from that in Fig. 1 essentially by the differently shaped second annulus 5. This is limited to the outside by a conical wall, which is known in hydrocyclones to increase the rotational speed and increase of Can cause centrifugal forces.
  • the adjoining cylindrical part has a correspondingly smaller diameter 13. As already mentioned, but not shown here, the conical part can also be guided to the outlet end 3.
  • FIG. 9 it is also possible to carry out a further reduction of the flow cross-section downstream of the second annular space 5, for which purpose a third annular space 4 ' is then used.
  • a constriction 8 ' is followed by a fourth annular space 5 ' widening in the axial direction.
  • a dilution chamber 12 ' with dilution water connection 11 ' can also be present at the second constriction 8 ' .
  • the dimensioning can be made similar to the (first) constriction 8.
  • This embodiment possibly with other bottlenecks not shown here, is able to further enhance the effect of the invention, since the loosening and fluidization of the pulp suspension is carried out according to more frequent.
  • FIG. 10 shows, it is also possible to place the lightweight material discharge 6 'at the inlet end 2 in such a way that the light fraction L accumulated in the center of the hydrocyclone in carrying out the process is completely upwards and the heavy fraction H downwards out of the hydrocyclone can drain, "up” and “down” applies when installed vertically.
  • the design shown in FIG. 10 has an inner wall 14 ' which is initially cylindrical and then conical, the cross-section being greatly reduced towards the outlet end 3.
  • the further variations of the invention shown in Fig. 10 may be used individually or in combination also in the devices already shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cyclones (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

L'invention concerne un procédé et un dispositif servant à fractionner des suspensions aqueuses de fibres à papier (S). En particulier, des forces centrifuges sont appliquées pour permettre l'obtention de bons résultats même en présence de constituants de suspension présentant des densités sensiblement équivalentes. Selon l'invention, la suspension de fibres à papier (S) pénétrant par la zone d'entrée (10) est acheminée tout d'abord dans une première chambre annulaire (4) se rétrécissant dans le sens axial puis dans une deuxième chambre annulaire (5) s'élargissant à nouveau dans le sens axial. Il est ainsi possible d'obtenir de bons résultats de fractionnement en particulier lorsque la teneur en matière fibreuse, dans la zone d'entrée, est d'environ 0,5 à 2 % et de maintenir simultanément les flux massiques requis à un niveau relativement faible. Ce procédé peut être mis en oeuvre par exemple pour le fractionnement de cellulose fraîche ou de pâte mécanique fraîche. Il peut cependant présenter également un intérêt sur le plan économique dans certains domaines du traitement des vieux papiers.
PCT/EP2005/010064 2004-09-22 2005-09-17 Procede pour fractionner une suspension aqueuse de fibres a papier et hydrocyclone pour la mise en oeuvre dudit procede Ceased WO2006032427A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2007532813A JP2008513625A (ja) 2004-09-22 2005-09-17 水性の紙繊維懸濁液を分別するための方法ならびに該方法を実施するためのハイドロサイクロン
DE502005006168T DE502005006168D1 (de) 2004-09-22 2005-09-17 Fasersuspension sowie hydrozyklon zur durchführung des verfahrens
EP05790369A EP1799903B1 (fr) 2004-09-22 2005-09-17 Procede pour fractionner une suspension aqueuse de fibres a papier et hydrocyclone pour la mise en oeuvre dudit procede

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004045823.5 2004-09-22
DE102004045823A DE102004045823A1 (de) 2004-09-22 2004-09-22 Verfahren zum Fraktionieren einer wässrigen Papierfasersuspension sowie Hydrozyklon zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
WO2006032427A1 true WO2006032427A1 (fr) 2006-03-30

Family

ID=35355635

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/010064 Ceased WO2006032427A1 (fr) 2004-09-22 2005-09-17 Procede pour fractionner une suspension aqueuse de fibres a papier et hydrocyclone pour la mise en oeuvre dudit procede

Country Status (7)

Country Link
EP (1) EP1799903B1 (fr)
JP (1) JP2008513625A (fr)
AT (1) ATE416272T1 (fr)
DE (2) DE102004045823A1 (fr)
ES (1) ES2317303T3 (fr)
RU (1) RU2007110481A (fr)
WO (1) WO2006032427A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008010447A1 (de) * 2008-02-21 2009-08-27 Voith Patent Gmbh Verfahren zur Behandlung und Verwendung einer Faserstoffsuspension
US11511243B2 (en) 2016-11-02 2022-11-29 Minoru Tamura Method for mixing a plurality of solutions
EP4245395A1 (fr) * 2022-03-17 2023-09-20 Messer SE & Co. KGaA Dispositif et procédé d'échange continu de gaz dans un flux d'un mélange de fluides

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008009134A1 (de) * 2008-02-14 2009-08-20 Voith Patent Gmbh Verfahren zur Entfernung von Störstoffen aus einer wässrigen Faserstoffsuspension
DE102010022414A1 (de) * 2010-06-01 2011-12-01 Günther Kramb jun. Emulgiervorrichtung
DE102010017409A1 (de) * 2010-06-17 2011-12-22 Daan Waubert de Puiseau Strömungsgenerator
AT511837B1 (de) * 2012-02-10 2013-03-15 Andritz Energy & Environment Gmbh Hydrozyklon mit feinstoffabreicherung im zyklonunterlauf
JP6604601B2 (ja) * 2014-06-05 2019-11-13 永進テクノ株式会社 サイクロン式分離装置
SI3503995T1 (sl) * 2016-08-24 2021-04-30 Hydro Intelligence Water Gmbh Naprava za energetsko optimizirano proizvajanje vrtincev fluida v reakcijski komori
DE102021004050A1 (de) * 2021-08-05 2023-02-09 Messer Se & Co. Kgaa Vorrichtung und Verfahren zum Trennen von Fluidgemischen
CN116586209B (zh) * 2023-07-11 2023-11-21 天津美腾科技股份有限公司 新型三段重介质旋流器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3248039A1 (de) * 1982-12-09 1984-06-14 Escher Wyss Gmbh, 7980 Ravensburg Wirbelsichter zum abscheiden von verunreinigungen aus stoffsuspensionen
US4696737A (en) * 1986-02-28 1987-09-29 The Bauer Bros. Co. Fiber recovery elutriating hydrocyclone
FR2703602A1 (fr) * 1993-04-06 1994-10-14 Callec Paul Procédé de séparation de produits particulaires de densités différentes en suspension dans un fluide et dispositif pour sa mise en Óoeuvre.
EP0677331A1 (fr) * 1994-04-01 1995-10-18 A. Ahlstrom Corporation Epurateur centrifuge
US5769243A (en) * 1996-07-30 1998-06-23 Thermo Black Clawson Inc. Through-flow cleaner with improved inlet section
US6284096B1 (en) * 1999-07-06 2001-09-04 Voith Sulzer Papiertechnik Patent Gmbh Process for discharging impurities from a hydrocyclone and a hydrocyclone
EP1413359A1 (fr) * 2002-10-22 2004-04-28 Voith Paper Patent GmbH Procédé et dispositif pour séparer les matières lourdes d'une suspension fibreuse

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3248039A1 (de) * 1982-12-09 1984-06-14 Escher Wyss Gmbh, 7980 Ravensburg Wirbelsichter zum abscheiden von verunreinigungen aus stoffsuspensionen
US4696737A (en) * 1986-02-28 1987-09-29 The Bauer Bros. Co. Fiber recovery elutriating hydrocyclone
FR2703602A1 (fr) * 1993-04-06 1994-10-14 Callec Paul Procédé de séparation de produits particulaires de densités différentes en suspension dans un fluide et dispositif pour sa mise en Óoeuvre.
EP0677331A1 (fr) * 1994-04-01 1995-10-18 A. Ahlstrom Corporation Epurateur centrifuge
US5769243A (en) * 1996-07-30 1998-06-23 Thermo Black Clawson Inc. Through-flow cleaner with improved inlet section
US6284096B1 (en) * 1999-07-06 2001-09-04 Voith Sulzer Papiertechnik Patent Gmbh Process for discharging impurities from a hydrocyclone and a hydrocyclone
EP1413359A1 (fr) * 2002-10-22 2004-04-28 Voith Paper Patent GmbH Procédé et dispositif pour séparer les matières lourdes d'une suspension fibreuse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008010447A1 (de) * 2008-02-21 2009-08-27 Voith Patent Gmbh Verfahren zur Behandlung und Verwendung einer Faserstoffsuspension
US11511243B2 (en) 2016-11-02 2022-11-29 Minoru Tamura Method for mixing a plurality of solutions
EP4245395A1 (fr) * 2022-03-17 2023-09-20 Messer SE & Co. KGaA Dispositif et procédé d'échange continu de gaz dans un flux d'un mélange de fluides

Also Published As

Publication number Publication date
RU2007110481A (ru) 2008-09-27
ES2317303T3 (es) 2009-04-16
DE502005006168D1 (de) 2009-01-15
JP2008513625A (ja) 2008-05-01
DE102004045823A1 (de) 2006-03-23
EP1799903B1 (fr) 2008-12-03
ATE416272T1 (de) 2008-12-15
EP1799903A1 (fr) 2007-06-27

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