EP1124003B1 - Classeur pour la purification d'une suspension fibreuse - Google Patents

Classeur pour la purification d'une suspension fibreuse Download PDF

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Publication number
EP1124003B1
EP1124003B1 EP01101939A EP01101939A EP1124003B1 EP 1124003 B1 EP1124003 B1 EP 1124003B1 EP 01101939 A EP01101939 A EP 01101939A EP 01101939 A EP01101939 A EP 01101939A EP 1124003 B1 EP1124003 B1 EP 1124003B1
Authority
EP
European Patent Office
Prior art keywords
rotor
screen
area
baffle
infeed
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
EP01101939A
Other languages
German (de)
English (en)
Other versions
EP1124003A2 (fr
EP1124003A3 (fr
Inventor
Helmuth Dipl.-Ing. Dr. Gabl
Axel Dipl.-Ing. Pichler
Alexander Dipl.-Ing. Gscheider
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.)
Andritz AG
Original Assignee
Andritz AG
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 Andritz AG filed Critical Andritz AG
Priority to AT01101939T priority Critical patent/ATE295446T1/de
Publication of EP1124003A2 publication Critical patent/EP1124003A2/fr
Publication of EP1124003A3 publication Critical patent/EP1124003A3/fr
Application granted granted Critical
Publication of EP1124003B1 publication Critical patent/EP1124003B1/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
    • D21D5/02—Straining or screening the pulp
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils

Definitions

  • the invention relates to a sorter for cleaning a Fibrous suspension.
  • Graders are machines used in the paper industry for cleaning a pulp suspension consisting of water, fiber and Dirt particles exists.
  • a feed stream over a Led sieve device wherein the accept current, consisting of water and fibers through which the sieve passes.
  • a partial flow, called Reject current, consisting of water, fibers and contaminants, is in the general at the opposite end of the feed stream deducted.
  • such a sorter designed rotationally symmetrical and consists of a housing with a tangentially arranged inlet, a cylindrical screen basket, usually with holes or vertical slots provided and a rotating rotor. The task of the rotor is to keep the Sieve slots, which by just at the Siebober constitutional rotating wings is reached.
  • the accept stream is in a so-called acceptance space, which is often conical, collected and radial in one place deducted.
  • the reject stream is generally at the inlet opposite side of the screen basket in a mostly annular Reject space out and subtracted tangentially from this.
  • Such a Sorter is e.g. from US 4,268,381.
  • the disadvantage of this Sorting machines is that by a relatively large Executed Rejektraum the risk of clogging at low Flow rates occurs. Furthermore, an uneven occurs Flow of the strainer basket and uneven Flow conditions in acceptance space, especially in the area of Acceptance, on.
  • Another sorter is known from WO 97/41296 known.
  • the aim of the invention is therefore to improve the To create flow conditions in the sorter, so that one Reduction of the energy used with increased production and To achieve dirt separation.
  • the invention is therefore characterized in that in the inlet area between pipe socket and the free end of the rotor a closed stationary installation is provided, the pulp suspension in the Space between parabolic rotor and cylindrical sieve deflects, wherein the stationary installation can be rotationally symmetrical. This will significantly improve the flow conditions and subsequently achieved a reduction in the energy used.
  • An advantageous development of the invention is characterized in that that the installation a cone, a truncated cone, hemisphere, spherical segment, Sphere layer, paraboloid or bivalve hyperboloid.
  • a favorable embodiment of the invention is characterized in that that when installed as a cone or truncated cone, the cone angle ⁇ between 10 ° and 60 °.
  • a favorable development of the invention is characterized in that that the axis of the inlet nozzle is arranged parallel to the conical surface is. This allows the flow to be better managed and the Energy losses are further reduced.
  • a favorable alternative embodiment of the invention is characterized characterized in that the installation is a spiral body, wherein the Slope of the spiral can be chosen such that the Flow velocity in the inlet area over the entire Bin width is constant.
  • a favorable development of the invention is characterized in that that distributed on the rotor several wings over height and / or circumference are provided.
  • Fig. 1 shows an embodiment of the invention
  • Fig. 2 an alternative embodiment of the invention
  • Fig. 3 shows an embodiment of a Double machine
  • Fig. 4 shows a further variant of the invention
  • Fig. 5 a 3-D representation of a variant of the invention
  • Fig. 6 shows the area for a integrated presorting
  • Fig. 7 is a diagram of the dependence of specific energy for Sieb dieströmung
  • Fig. 8 is a diagram of Dirt point reduction for Sieb prepareströmung represents.
  • Fig. 1 shows a sorter 1, through an inlet nozzle 2 a Pulp suspension is supplied for cleaning.
  • an installation 3 is provided, which is shown here as a truncated cone is.
  • the "tip" of the truncated cone points in the direction of the rotor 4.
  • the Installation 3 can be designed both as a hollow body, as well as a solid body be.
  • the flank angle is ⁇ of Truncated cone between 10 ° and 60 °.
  • the pulp suspension enters the Space between rotor 4 and sieve 5 and passes through the sieve promoted into the accept space 6.
  • the housing of the acceptance space is Double-conical executed, i. the case tapers off from the Upper edge of the accept outlet 7 conically towards the Rejektraum out, where the angle of acceptance space for a constant flow velocity assuming uniform outflow through the sieve is designed.
  • the rotor 4 of the sorter 1 is for a uniform Siebanströmung, which causes a low thickening behavior above the screen height, designed. He has the form of a parabola, so that the axial Flow rate within the screen basket at assumed uniform outflow through the sieve remains constant.
  • the shape of the rotor can also be approximated by a cone shape.
  • Fig. 2 shows an analog arrangement of a sorter 1, wherein here the Inlet nozzle 2 is arranged so that the suspension parallel to Cloak of the truncated cone 3 is supplied. This allows the Energy loss that otherwise exists in flow diversion, be avoided.
  • Fig. 3 shows the execution of a top machine, as they are for high Production services is carried out.
  • the rotor becomes e.g. when Double parabolic rotor 4, 4 'or double bevel rotor executed.
  • the Rejektabzug 8, 8 'and the strainer 5, 5' is in duplicate intended.
  • the accept space 6, 6 ' is designed doppelkonisch, i.e. turn, that the housing ca from the top of the Acceptance outlet 7, 7 'tapers conically towards the Rejektraum.
  • the pulp suspension is in turn fed via the supply nozzle 2 and in the illustrated embodiment axially guided by the rotor.
  • This type of flow is the drive-side rotor part 4 in height L1 equal to or greater than the on and flowed through, the drive side remote rotor part 4 'with the height L2.
  • the suspension occurs in the middle Area through openings 9 from the perfused rotor part 4 'and is distributed here in both directions. It occurs like a simple one Sorter through the strainer 5, 5 'through into the accept space 6, 6', the here also doppelkonisch executed.
  • the reject flows both up and down and is here in a Rejektraum 8, 8 ' removed from the machine.
  • the Feed also in the middle from one side.
  • the accept outlet can either twice, i. above (7 ') or below (7) or simply in the middle to be appropriate.
  • the sorting machine can also be in lying form be executed.
  • Fig. 4 shows a variant of the invention, wherein as installation a perpendicular standing, about 270 ° circumferential sheet 3 'is provided.
  • This Sheet 3 ' deflects the flow of material from the inlet 2 by means of its spiral shape coming evenly into the screen basket 5.
  • Fig. 4 is this type of installation 3 'shown in plan. It can be seen that the sheet 3 'at Point 16 begins and then spirally around the midpoint (the axis) goes to point 17.
  • the room 15 (shown hatched) between Sheet 3 'and outer wall of the sorter can remain free. Essential is that the flow area is continuously reduced and thus given a largely uniform flow velocity is adapted to the inflow of the suspension in the strainer 5 is.
  • Fig. 5 shows the 3-D representation of a further variant of the invention.
  • Installation 3 "is attached to the lid, with the surface spiraling in Direction of the screen basket runs.
  • the pulp suspension is from the Inlet 2 ago on the screen basket facing surface directly into the Guided strainer, whereby the outflow is taken into account here, too, that the flow rate is practically constant. Thereby Energy losses can be minimized.
  • Fig. 6 now shows the upper part of a sorter 1 with an integrated Presorting.
  • the sorter 1 via the inlet nozzle 2 the Supplied pulp suspension.
  • a Vorsortier Scheme 10 provided in the suspension passes through a sieve 11. This allows specific heavy parts and large-scale contaminations that come from polluted or high contaminated pulp, be removed well.
  • a rotor 12 runs along with the rotor 4 via a Extension 13 is connected. The heavy parts leave the pre-sorting area through a nozzle 14.
  • the rotor 12 can in Vorsortier Scheme 10 both in the feed stream (as shown) or in the accept stream, then a further fine sorting in the lower part of the Sorter 1 is fed, run. Does the rotor 12 in the feed stream, so become strong by the rotating cleaning blades of the rotor 12 Abrasive abrasive particles are held on the surface of the Turn sieves 11 open and damage them.
  • Fig. 7 shows the diagram of the energy demand over the Sieb thoroughlyströmung, here a curve for previous sorter and a Curve for the sorter according to the invention with a tapered installation is shown in the Zulaufraum.

Landscapes

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

Claims (18)

  1. Classeur pour l'épuration d'une suspension de pâte, avec un rotor parabolique, un panier de crible stationnaire, et une chambre d'acceptes disposée en dehors ainsi qu'une décharge pour détritus, où la suspension de pâte est menée à l'aire intérieure du panier de crible entre le rotor et le crible, caractérisé en ce qu'une chicane stationnaire fermée (3, 3', 3") est prévue dans la zone d'amenée entre la prise du tuyau (2) et le bout libre du rotor (4), qui détourne la suspension de pâte vers l'aire entre le rotor parabolique (4) et le crible cylindrique (5).
  2. Dispositif selon la revendication 1, caractérisé en ce que la chicane (3) est étudiée à symétrie de révolution.
  3. Dispositif selon la revendication 2, caractérisé en ce que la chicane (3) est un cône, un cône tronqué, un hémisphère, un segment sphérique, un segment sphérique à deux bases, un paraboloide, ou un hyperboloide à deux nappes.
  4. Dispositif selon la revendication 2, avec une chicane en forme de cône ou cône tronqué, caractérisé en ce que l'angle α du cône se situe entre 10° et 60°.
  5. Dispositif selon la revendication 4, caractérisé en ce que l'axe de la prise d'amenée (2) est disposé en parallèle à la chemise du cône.
  6. Dispositif selon la revendication 1, caractérisé en ce que la chicane (3', 3") est un corps en forme hélicoïdale.
  7. Dispositif selon la revendication 6, caractérisé en ce que le pas de l'hélice est tel que la vitesse d'écoulement dans la zone d'amenée est constante sur toute la largeur du panier de crible.
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que la chicane (3, 3', 3") est disposée au centre.
  9. Dispositif selon la revendication 1 à 7, caractérisé en ce que la chambre d'acceptes (6, 6') est étudiée en forme de cône double.
  10. Dispositif selon la revendication 1 à 9, caractérisé en ce que le classeur (1) est étudié en tant que machine double.
  11. Dispositif selon la revendication 10, caractérisé en ce que l'amenée a lieu axialement au travers du rotor (4).
  12. Dispositif selon la revendication 11, caractérisé en ce que la partie du rotor (4) se situant au côté d'entraínement est de hauteur égale ou plus importante par rapport à la partie du rotor (4') se situant de l'autre côté de l'entraínement où la pâte coule et par lequel elle passe.
  13. Dispositif selon la revendication 12, caractérisé en ce que l'amenée se fait latéralement, au centre.
  14. Dispositif selon l'une des revendications 10 à 13, caractérisé en ce que deux décharges (7, 7') sont prévues pour les acceptes.
  15. Dispositif selon l'une des revendications 1 à 14, caractérisé en ce que le classeur (1) est placé horizontalement
  16. Dispositif selon l'une des revendications 1 à 15, caractérisé en ce qu'un panier de crible (11) qui tourne ensemble avec le rotor (12) est prévu pour la classification préliminaire dans la zone d'amenée.
  17. Dispositif selon la revendication 16, caractérisé en ce que des ailes rotatives sont prévues dans la zone de classification préliminaire (10).
  18. Dispositif selon l'une des revendications 1 à 17, caractérisé en ce que le rotor (4, 4') a plusieurs ailes montées à des niveaux différents et/ou distribuées sur la circonférence.
EP01101939A 2000-02-03 2001-01-29 Classeur pour la purification d'une suspension fibreuse Expired - Lifetime EP1124003B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT01101939T ATE295446T1 (de) 2000-02-03 2001-01-29 Sortierer zur reinigung einer faserstoffsuspension

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1702000 2000-02-03
AT0017000A AT408772B (de) 2000-02-03 2000-02-03 Sortierer zur reinigung einer faserstoffsuspension

Publications (3)

Publication Number Publication Date
EP1124003A2 EP1124003A2 (fr) 2001-08-16
EP1124003A3 EP1124003A3 (fr) 2001-11-21
EP1124003B1 true EP1124003B1 (fr) 2005-05-11

Family

ID=3655604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01101939A Expired - Lifetime EP1124003B1 (fr) 2000-02-03 2001-01-29 Classeur pour la purification d'une suspension fibreuse

Country Status (9)

Country Link
US (1) US6631809B2 (fr)
EP (1) EP1124003B1 (fr)
CN (1) CN1180159C (fr)
AT (2) AT408772B (fr)
BR (1) BR0100354A (fr)
CA (1) CA2333800A1 (fr)
DE (1) DE50106153D1 (fr)
ES (1) ES2242662T3 (fr)
MX (1) MXPA01001294A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2444486C (fr) * 2001-04-16 2013-04-02 J & L Fiber Services, Inc. Epurateur a pate a papier et son procede
DE10233364C1 (de) * 2002-07-23 2003-12-24 Voith Paper Patent Gmbh Drucksortierer zum Sieben einer Faserstoffsuspension
AT413390B (de) 2003-03-27 2006-02-15 Andritz Ag Maschf Sortierer zur reinigung einer fasersuspension
JP2005171449A (ja) * 2003-12-15 2005-06-30 Aikawa Iron Works Co Ltd 製紙用スクリ−ン装置
DE102011079230A1 (de) * 2011-07-15 2013-01-17 Voith Patent Gmbh Drucksortierer

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053391A (en) * 1959-08-17 1962-09-11 Bird Machine Co Apparatus for screening
SU606635A1 (ru) * 1976-02-11 1978-05-15 Государственный проектно-конструкторский институт "Гипромашуглеобогащение" Грохот
US4268381A (en) * 1979-05-03 1981-05-19 Uniweld Inc. Rotary pulp screening device of the vertical pressure type
CA1238604A (fr) * 1983-12-12 1988-06-28 Anthony W. Hooper Classeur a pate rotatif a pression verticale et a plusieurs tamis echelonnes le long du classeur
US5061370A (en) * 1990-03-20 1991-10-29 Quebec And Ontario Paper Company Ltd. Screening device for slurries with improved rotor and hub design
DE4135854A1 (de) * 1991-10-31 1993-05-06 J.M. Voith Gmbh, 7920 Heidenheim, De Sortierer
FI91648C (fi) * 1993-01-11 1994-07-25 Tampella Oy Valmet Sovitelma painelajittimessa epäpuhtauksien erottamiseksi siihen syötettävästä kuitumassasta
US5575395A (en) * 1994-07-15 1996-11-19 A. Ahlstrom Corporation Method and apparatus for screening fibrous suspensions
US5884774A (en) * 1996-03-11 1999-03-23 Aikawa Iron Works Co., Ltd. Papermaking screen
SE507481C2 (sv) * 1996-05-02 1998-06-15 Alfa Laval Ab Anordning för separering av föroreningar från fibermassasuspensioner
SE511786C2 (sv) * 1998-03-06 1999-11-22 Sunds Defibrator Ind Ab Silanordning med två silkammare för separering av fibersuspensioner

Also Published As

Publication number Publication date
ATA1702000A (de) 2001-07-15
CN1180159C (zh) 2004-12-15
AT408772B (de) 2002-03-25
ATE295446T1 (de) 2005-05-15
EP1124003A2 (fr) 2001-08-16
CN1314515A (zh) 2001-09-26
MXPA01001294A (es) 2005-08-16
CA2333800A1 (fr) 2001-08-03
ES2242662T3 (es) 2005-11-16
US6631809B2 (en) 2003-10-14
BR0100354A (pt) 2001-10-02
DE50106153D1 (de) 2005-06-16
EP1124003A3 (fr) 2001-11-21
US20010022284A1 (en) 2001-09-20

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