EP1124003A2 - 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
EP1124003A2
EP1124003A2 EP01101939A EP01101939A EP1124003A2 EP 1124003 A2 EP1124003 A2 EP 1124003A2 EP 01101939 A EP01101939 A EP 01101939A EP 01101939 A EP01101939 A EP 01101939A EP 1124003 A2 EP1124003 A2 EP 1124003A2
Authority
EP
European Patent Office
Prior art keywords
rotor
installation
cone
sorter
inlet
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
EP01101939A
Other languages
German (de)
English (en)
Other versions
EP1124003B1 (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.
  • Sorters are machines used for cleaning in the paper industry a stock suspension consisting of water, fibrous materials and Dirt particles exist. In this case, an inflow flow over a Screening device performed, the acceptance stream consisting of water and fibers flowing through the screen. A partial stream, called Reject flow, consisting of water, fibers and contaminants, is in the generally at the end opposite the feed stream deducted.
  • Such a sorter is generally rotationally symmetrical executed and consists of a housing with a tangential arranged inlet, a cylindrical screen basket, usually with holes or vertical slots and a rotating rotor. The task of the rotor is to keep the screen slots free is achieved by blades rotating just on the surface of the screen.
  • the Acceptance flows in a so-called acceptance room, which is often conical is carried out, collected and deducted radially at one point.
  • the Reject flow is generally on the opposite side of the inlet Side of the screen basket in a mostly ring-shaped reject space and subtracted from this tangentially.
  • Such a sorter is e.g. from the US 4,268,381 known.
  • the disadvantage of these sorting machines is in the fact that a relatively large reject space creates the danger of clogging occurs at low flow rates.
  • the aim of the invention is therefore to improve the To create flow conditions in the sorter to create a Reduction of the energy used with increased production and To achieve dirt separation.
  • the invention is therefore characterized in that in the inlet area A stationary installation between the pipe socket and the end of the rotor is provided, which can be rotationally symmetrical. Thereby becomes a significant improvement in flow conditions and in a further consequence is a reduction in the energy used.
  • An advantageous development of the invention is characterized in that that the installation of a cone, a truncated cone, hemisphere, spherical segment, Spherical layer, paraboloid or double-shell hyperboloid.
  • a favorable embodiment of the invention is characterized in that that when installed as a cone or truncated cone, the cone angle ⁇ is between 10 ° and 60 °.
  • a favorable further development of the invention is characterized in that that the axis of the inlet nozzle is arranged parallel to the cone jacket is. This allows the flow to be guided better and the Energy losses can be reduced further.
  • a favorable alternative embodiment of the invention is thereby characterized in that the installation is a spiral body, the Slope of the spiral can be chosen such that the Flow velocity in the inlet area over the entire Sorting basket width is constant.
  • An advantageous development of the invention is characterized in that that the installation is arranged centrally.
  • An advantageous embodiment of the invention is characterized in that that the acceptance room is double conical.
  • An advantageous development of the invention is characterized in that that the sorter is designed as a double machine.
  • a favorable further development of the invention is characterized in that that the inlet takes place axially through the rotor.
  • a favorable embodiment of the invention is characterized in that that the drive-side rotor part in height equal to or greater than that flowed in and flowed through, the drive side facing away rotor part.
  • a favorable embodiment of the invention is characterized in that that the inlet is in the middle from the side.
  • An advantageous development of the invention is characterized in that that the acceptance outlet is provided twice.
  • An advantageous embodiment of the invention is characterized in that that the sorter is arranged horizontally.
  • a favorable further development of the invention is characterized in that that for presorting a screen basket rotating with the rotor in Inflow area is provided, with rotating also in the pre-sorting area Wings can be provided.
  • a favorable further development of the invention is characterized in that that several blades are distributed over the height and / or circumference of the rotor are provided.
  • 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 sieve flow
  • Fig. 8 is a diagram of the Dirt point reduction for sieve flow represents.
  • Fig. 1 shows a sorter 1, the one through an inlet port 2 Fibrous suspension is fed for cleaning.
  • Inlet 3 In the area of Inlet 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 and as a solid body his.
  • the flank angle is ⁇ des Truncated cone between 10 ° and 60 °.
  • the fiber suspension enters the Space between rotor 4 and sieve 5 and is through the sieve promoted to acceptance room 6.
  • the housing of the acceptance room is double-conical, i.e. the housing tapers approximately from the The upper edge of the acceptance outlet 7 is conical towards the reject space, whereby the angle of the acceptance room for a constant flow rate assuming a uniform flow through the sieve is laid out.
  • the rotor 4 of the sorter 1 is for a uniform flow against the sieve, which causes a low thickening behavior above the screen height, designed. It has the shape of a parabola, so that the axial Flow velocity within the strainer basket when assumed uniform outflow through the sieve remains constant. Alternatively the shape of the rotor can also be approximated using a cone shape.
  • the reject space designed such that flow velocities greater than 2.5 m / sec with or without additional input of stirring energy by the rotor available. This practically prevents constipation.
  • Fig. 2 shows an analog arrangement of a sorter 1, here the Inlet nozzle 2 is arranged so that the suspension parallel to Shell of the truncated cone 3 is supplied. This allows the Energy loss that is otherwise present when the flow is diverted, be avoided.
  • Fig. 3 shows the execution of a top machine, as for high Production performance is carried out.
  • the rotor is e.g. as Double parabolic rotor 4, 4 'or double cone rotor.
  • the Reject deduction 8, 8 'and the screen basket 5, 5' is in duplicate intended.
  • the acceptance room 6, 6 ' is double-conical, i.e. again that the housing is approx. from the upper edge of the Acceptance outlets 7, 7 'tapered towards the reject space.
  • the stock suspension is here again supplied via the supply nozzle 2 and in the embodiment shown axially guided by the rotor.
  • the drive-side rotor part 4 in height L1 equal to or greater than the inflow and through flow, the drive side facing rotor part 4 'with the height L2.
  • the suspension occurs in the middle Area through openings 9 from the flowed through rotor part 4 'and is distributed here in both directions. It occurs like a simple one Sorter through the sieve basket 5, 5 'into the acceptance room 6, 6', the is also double conical here.
  • the reject flows both up and down and is here in a reject space 8, 8 ' removed from the machine.
  • the Inlet also take place centrally from one side.
  • the accept outlet can either twice, i.e. above (7 ') or below (7) or simply in the middle to be appropriate.
  • the sorting machine can also be in a lying position be carried out.
  • Fig. 4 shows a variant of the invention, a vertical installation standing, around 270 ° rotating sheet 3 'is provided.
  • This Sheet 3 ' uses its spiral shape to direct the flow of material from the inlet 2 coming evenly into the strainer basket 5.
  • this type of installation 3 ' shown in supervision. It can be seen that the sheet 3 'at Point 16 begins and then spirals around the center (the axis) runs up to point 17.
  • the space 15 (shown hatched) between Sheet 3 'and the outer wall of the sorter can remain free.
  • Essential is that the flow cross-section decreases continuously and thus a largely uniform flow rate is given is adapted to the inflow of the suspension into the screen basket 5 is.
  • FIG. 5 shows the 3-D representation of a further variant of the invention.
  • the Installation 3 is attached to the lid, the surface spiraling in Direction of the strainer runs.
  • the fiber suspension is from Inlet 2 forth on the surface facing the screen basket directly into the Screen basket steered, here also the outflow is taken into account 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 one Pre-sorting.
  • the sorter 1 via the inlet nozzle 2 Fibrous suspension fed.
  • a Heavy part separation is in the upper area of the A sorting area 10 is provided in the sorter 1, into which the suspension passes through a sieve 11. This allows specifically heavy parts and large-scale impurities that come from dirty or high soiled fibers result, 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 the pre-sorting area 10 both in the feed stream (as shown) or in the acceptance stream, then another fine sorting in the lower area of the Sorter 1 is fed, run. If the rotor 12 is running in the feed stream, see above are the strong by the rotating cleaning blades of the rotor 12 abrasive heavy parts are held on the surface of the Open sieve 11 and damage it.
  • the specifically heavy parts are centrifuged outwards.
  • a longer service life of the screen baskets in the Pre-sorting area achieved, on the other hand, by means of the targeted barrier Pre-sorting basket sustainable storage of heavy parts in the centrifugal re-sorting area reached.
  • the separate discharge of rough and Smaller impurities lead to increased performance (throughput and increased effectiveness) compared to conventional sorting machines.
  • this variant can also be used with a Double cone rotor can be executed.
  • Fig. 7 shows the diagram of the energy requirement over the Sieve flow, here a curve for previous sorters and a Curve for the sorter according to the invention with a tapered installation is shown in the inlet area.
  • Fig. 8 is the dirt spot reduction over the sieve flow shown. It can be seen here that through a conical installation in Inlet space also the dirt point reduction can be increased significantly could, while lowering the specific energy requirement.

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)
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 true EP1124003A2 (fr) 2001-08-16
EP1124003A3 EP1124003A3 (fr) 2001-11-21
EP1124003B1 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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233364C1 (de) * 2002-07-23 2003-12-24 Voith Paper Patent Gmbh Drucksortierer zum Sieben einer Faserstoffsuspension
EP1462567A1 (fr) 2003-03-27 2004-09-29 Andritz AG Classeur pour la purification d'une suspension fibreuse
WO2013010755A1 (fr) * 2011-07-15 2013-01-24 Voith Patent Gmbh Classeur sous pression

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6915910B2 (en) * 2001-04-16 2005-07-12 J&L Fiber Services, Inc. Screen cylinder and method
JP2005171449A (ja) * 2003-12-15 2005-06-30 Aikawa Iron Works Co Ltd 製紙用スクリ−ン装置

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 Uniweld Inc. 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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233364C1 (de) * 2002-07-23 2003-12-24 Voith Paper Patent Gmbh Drucksortierer zum Sieben einer Faserstoffsuspension
EP1462567A1 (fr) 2003-03-27 2004-09-29 Andritz AG Classeur pour la purification d'une suspension fibreuse
WO2013010755A1 (fr) * 2011-07-15 2013-01-24 Voith Patent Gmbh Classeur sous pression
CN103687991A (zh) * 2011-07-15 2014-03-26 沃依特专利有限责任公司 压力筛浆机
CN103687991B (zh) * 2011-07-15 2016-08-17 沃依特专利有限责任公司 压力筛浆机

Also Published As

Publication number Publication date
AT408772B (de) 2002-03-25
CN1180159C (zh) 2004-12-15
CN1314515A (zh) 2001-09-26
BR0100354A (pt) 2001-10-02
DE50106153D1 (de) 2005-06-16
ATA1702000A (de) 2001-07-15
US20010022284A1 (en) 2001-09-20
ATE295446T1 (de) 2005-05-15
US6631809B2 (en) 2003-10-14
EP1124003B1 (fr) 2005-05-11
EP1124003A3 (fr) 2001-11-21
CA2333800A1 (fr) 2001-08-03
MXPA01001294A (es) 2005-08-16
ES2242662T3 (es) 2005-11-16

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