EP0203295B1 - Sortierer - Google Patents

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Publication number
EP0203295B1
EP0203295B1 EP86103843A EP86103843A EP0203295B1 EP 0203295 B1 EP0203295 B1 EP 0203295B1 EP 86103843 A EP86103843 A EP 86103843A EP 86103843 A EP86103843 A EP 86103843A EP 0203295 B1 EP0203295 B1 EP 0203295B1
Authority
EP
European Patent Office
Prior art keywords
space
screen
accepts
sorter
drain
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
Application number
EP86103843A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0203295A1 (de
Inventor
Hans-Otto Henrich
Reimund Rienecker
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
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT86103843T priority Critical patent/ATE43660T1/de
Publication of EP0203295A1 publication Critical patent/EP0203295A1/de
Application granted granted Critical
Publication of EP0203295B1 publication Critical patent/EP0203295B1/de
Expired 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
    • D21D5/06—Rotary screen-drums
    • D21D5/08—Rotary screen-drums combined with a rocking movement
    • D21D5/14—Rotary screen-drums combined with a rocking movement of the tank and the screen
    • 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 according to the preamble of patent claim 1.
  • a sorter is known from GB-A 14 92 209.
  • This sorter has a damping space with a gas pressure cushion, as a result of which, in particular, the pulsations caused by the rotating sorting elements within a sieve basket the suspension, especially shortly before the headbox of a paper machine.
  • the object of the invention is now to design a sorter with a damper chamber so that the sorting effect is not impaired and that even an improved damping behavior can possibly be achieved.
  • a screen space for the accept material lying radially outside of the strainer basket is present here, to which the accept material collecting space adjoins in the axial direction above the strainer basket.
  • the accept outlet then leads away from this accept area.
  • the pulsations caused by the rotating sorting elements first have to spread out in the screen area and partially even out here.
  • the damping behavior can be further improved by means of additional throttle cross sections connected between the sieve space and the accept material space.
  • the rejects collection space or the outlet for the overflow and the material inlet are located at opposite, distant ends of the strainer basket, so that the sorting effect is maximal, as usual.
  • the sorter shown in FIG. 1 has a rotor 1, the sorting elements 2 of which run parallel to the shaft 3 of the rotor and are arranged close to a rotationally symmetrical strainer basket 4.
  • the rotor has two arms, to each of which a sorting element 2 is attached.
  • rotors with a drum-shaped structure are also particularly suitable, with different, quite numerous sections of these sorting elements 2 then being located between the casing of the drum and the strainer basket 4.
  • the sieve 4 is surrounded by a sieve space 5, in which the accepted material accumulates. The material is fed into the space inside the sieve 4, where the rotor 1 is located, via a feed space 6, which is arranged below the sieve 4. It preferably has a tangential inlet 7.
  • the non-sortable portion of the suspension i.e. the overflow
  • Lines 11, which are connected to outlet openings 12, 12 ′ of the discharge space 8 depart from this discharge space. They can be combined in a manifold 13.
  • a pipe 14 extends centrally upward from the discharge space for overflow and serves either as a vent, but at the same time can also serve to remove light impurities. Furthermore, it is necessary to draw off the entire overflow via an outlet pipe 14 with a correspondingly large diameter.
  • the accepted substance space 9 has a gas cushion 16 in its upper part, which e.g. Can be air or nitrogen, and to which a pressure control line 15 is connected.
  • the pressure of the gas cushion can be regulated via this control line 15 in accordance with the average pressure prevailing in the sorter or in accordance with the requirements of the headbox.
  • Pulsations that arise in the accept material space 5 or could propagate beyond this from the inlet 7 of the sorter are extremely effectively dampened by this pressure cushion. However, this applies both to pulsations caused by an upstream pump and by the sorting elements 2.
  • the outlet nozzle 10 on the accept material space 9 is also preferably connected tangentially. It could be moved a little further upwards in order to then also remove the discharge nozzle 11 for the overflow e.g. to be arranged on the same side as the accept material discharge nozzle 10.
  • the area ratio between the cross section of the outlet opening of the accept material discharge nozzle 10 and the ring area of the accept material space 9 is relatively small and is approximately 1:12 here. It can be assumed that values of 1: 8 or 1:10 already produce a reasonably satisfactory result.
  • constriction point 18 could also be produced by not making the diameter in the lower part of the overflow discharge space 8 relatively large in relation to the diameter of the sieve 4, as is the case here, but by making this transition point through a perforated ring plate 20 according to FIG. 2 narrowed.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Separation Of Particles Using Liquids (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Cyclones (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Centrifugal Separators (AREA)
EP86103843A 1985-05-30 1986-03-20 Sortierer Expired EP0203295B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103843T ATE43660T1 (de) 1985-05-30 1986-03-20 Sortierer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3519373 1985-05-30
DE19853519373 DE3519373A1 (de) 1985-05-30 1985-05-30 Sortiergeraet

Publications (2)

Publication Number Publication Date
EP0203295A1 EP0203295A1 (de) 1986-12-03
EP0203295B1 true EP0203295B1 (de) 1989-05-31

Family

ID=6271998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103843A Expired EP0203295B1 (de) 1985-05-30 1986-03-20 Sortierer

Country Status (8)

Country Link
US (1) US4710287A (ko)
EP (1) EP0203295B1 (ko)
KR (1) KR930009273B1 (ko)
AT (1) ATE43660T1 (ko)
BR (1) BR8602831A (ko)
CA (1) CA1279294C (ko)
DE (2) DE3519373A1 (ko)
ES (1) ES8705064A1 (ko)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3503241A1 (de) * 1985-01-31 1986-08-07 J.M. Voith Gmbh, 7920 Heidenheim Sortierer, insbesondere vertikalsichter
FI76851C (fi) * 1987-07-06 1988-12-12 Ahlstroem Oy Foerfarande och anordning foer renhaollning av sil- eller siktyta.
US5009774A (en) * 1989-10-30 1991-04-23 Beloit Corporation Pulseless screen
FI91090C (fi) * 1992-09-10 1994-05-10 Ahlstroem Oy Menetelmä ja laite massan käsittelemiseksi
US5323913A (en) * 1992-12-08 1994-06-28 Bird Escher Wyss Inc. Pressure screening apparatus with baffle
US5580446A (en) * 1994-10-20 1996-12-03 International Paper Company Screen, vortex apparatus for cleaning recycled pulp and related process
DE102006030905B3 (de) * 2006-07-04 2007-07-19 Voith Patent Gmbh Verfahren zur Abscheidung von Verunreinigungen aus einer Faserstoffsuspension

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3145165A (en) * 1961-10-23 1964-08-18 Sandison Alexander Greswolde Pulp screens
FR1600477A (ko) * 1967-12-14 1970-07-27
US3680696A (en) * 1970-03-23 1972-08-01 Bird Machine Co Screening
GB1294980A (ko) * 1970-05-11 1972-11-01
GB1348347A (en) * 1971-08-16 1974-03-13 Burkhardt H H Kurtz H M Apparatus for filtering a fibrous material suspension
CH586074A5 (ko) * 1974-12-03 1977-03-31 Escher Wyss Gmbh
US4166028A (en) * 1976-05-20 1979-08-28 The Black Clawson Company Apparatus for screening paper fiber stock
FI58955C (fi) * 1976-11-22 1981-05-11 Valmet Oy I tillrinningsroerledning i en pappersmaskins hydrauliska inloppslaoda placerbar daempningsanordning foer tryck- och stroemningsstoerningar
US4126513A (en) * 1977-06-30 1978-11-21 Beloit Corporation Air dome attenuator
US4391702A (en) * 1977-10-07 1983-07-05 Nippon Steel Corporation Method for classification of coals for coke production
US4234417A (en) * 1979-03-29 1980-11-18 Gauld Equipment Manufacturing Co. Fibrous stock screen
US4328096A (en) * 1980-03-17 1982-05-04 The Black Clawson Company Dual flow screening apparatus
JPS57153775A (en) * 1981-03-16 1982-09-22 Kikkoman Shoyu Co Ltd Classifier
DE3121855C2 (de) * 1981-06-02 1984-12-06 J.M. Voith Gmbh, 7920 Heidenheim Rotationssortierer für Faserstoffsuspensionen
DE3140549C2 (de) * 1981-10-13 1986-10-16 J.M. Voith Gmbh, 7920 Heidenheim Sortiergerät für Fasersuspensionen der Papierindustrie
US4462900A (en) * 1982-07-16 1984-07-31 Beloit Corporation Centrifugal pulp screening device and method

Also Published As

Publication number Publication date
DE3663699D1 (en) 1989-07-06
CA1279294C (en) 1991-01-22
ES8705064A1 (es) 1987-04-16
ATE43660T1 (de) 1989-06-15
EP0203295A1 (de) 1986-12-03
KR860009191A (ko) 1986-12-20
DE3519373C2 (ko) 1989-03-23
DE3519373A1 (de) 1986-12-04
KR930009273B1 (ko) 1993-09-25
ES555443A0 (es) 1987-04-16
US4710287A (en) 1987-12-01
BR8602831A (pt) 1987-02-10

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