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DE275967T1 - METHOD AND DEVICE FOR SEPARATING NODES. - Google Patents

METHOD AND DEVICE FOR SEPARATING NODES.

Info

Publication number
DE275967T1
DE275967T1 DE198888100678T DE88100678T DE275967T1 DE 275967 T1 DE275967 T1 DE 275967T1 DE 198888100678 T DE198888100678 T DE 198888100678T DE 88100678 T DE88100678 T DE 88100678T DE 275967 T1 DE275967 T1 DE 275967T1
Authority
DE
Germany
Prior art keywords
cylinder
residue
ribs
rotation
pulp
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.)
Pending
Application number
DE198888100678T
Other languages
German (de)
Inventor
Kaj Sf-48100 Kotka Henricson
Erkki Sf-53200 Lappeenranta Repo
Hannu Sf-48700 Kyminlinna Roenkoenharju
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.)
Ahlstrom Corp
Original Assignee
Ahlstrom Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8523793&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE275967(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ahlstrom Corp filed Critical Ahlstrom Corp
Publication of DE275967T1 publication Critical patent/DE275967T1/en
Pending legal-status Critical Current

Links

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Filtration Of Liquid (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Abstract

The invention relates to a method and apparatus for separating knots. In particular the method and the apparatus are meant to be used in separating knots from fibre suspensions of the wood processing industry. The knotter according to the invention uses a profiled screen cylinder (5) with which it has been found from performed tests to be most preferable to feed the pulp from the connections (2) in the direction of rotation of the screen cylinder and also to discharge the reject from the connections (4) and the accept from the connections (3) of the cylinder (5) in the direction of rotation. As a result, there is not only less wear of the screen surface, but also a significantly smaller consumption of power per pulp ton than in the apparatuses in accordance with the prior art.

Claims (10)

Anmeldenummer: 88 100 678.7 46 760 pl/st Veröffentlichungsnummer: 0 275 967 PatentansprücheApplication number: 88 100 678.7 46 760 pl/st Publication number: 0 275 967 Patent claims 1. Verfahren zum Aussondern von Knoten und anderen
Feststoffen aus einer Faser-Suspension mit Hilfe eines sich drehenden Siebzylinders, an dessen Außenfläche
die zu behandelnde Faser-Suspension zugeführt wird und von dessen Innenfläche die für gut befundene
Suspension abgeführt wird, wobei der Rückstand von der Sieb-Außenfläche abgeführt wird, dadurch
gekennzeichnet,1. Procedure for separating nodes and other
Solids from a fiber suspension using a rotating sieve cylinder, on the outer surface of which
the fibre suspension to be treated is fed in and from whose inner surface the approved
Suspension is discharged, whereby the residue is removed from the sieve outer surface, thereby
marked, - daß die Faser-Suspension tangential in Drehrichtung
des Siebzylinders zugeführt und- that the fibre suspension is tangential in the direction of rotation
of the screen cylinder and - der Rückstand tangential in Drehrichtung des
Siebzylinders abgeführt wird und- the residue tangentially in the direction of rotation of the
screen cylinder and - daß der Siebzylinder dadurch saubergehalten wird,
daß er von innen her positiven oder negativen
Druckstößen ausgesetzt wird.- that the screen cylinder is kept clean,
that he has positive or negative influences from within.
exposed to pressure surges. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet,
daß das Abführen des Rückstandes durch das Einsprühen
von Wasser in den Auslaß für den Rückstand erleichtert wird, wodurch gleichzeitig die Dickflüssigkeit des
Rückstandes verdünnt wird.2. Method according to claim 1, characterized in
that the removal of the residue by spraying
of water into the outlet for the residue, which at the same time reduces the viscosity of the
residue is diluted. • ■■* · ■ · · ·• ■■* · ■ · · · 2 8375967 2 8375967 3. Vorrichtung zum Aussondern von Knoten und anderen Feststoffen aus einer Faser-Suspension mit einem gelochten Zylinder (5), der sich in einem äußeren Gehäuse (1) dreht, einer Achse (7), einem oder mehreren Flügeln innerhalb des Zylinders (5) und mit am Gehäuse angebrachten Anschlüssen (2, 3, 4) für die Pulpe, für die durchgesiebte Pulpe und für den abgesonderten Rückstand, dadurch gekennzeichnet,3. Device for separating knots and other solids from a fiber suspension with a perforated cylinder (5) which rotates in an outer housing (1), an axle (7), one or more vanes within the cylinder (5) and with connections (2, 3, 4) attached to the housing for the pulp, for the sieved pulp and for the separated residue, characterized in that - daß die Drehrichtung des Zylinders (5) parallel zu der zuführrichtung der Pulpe durch den Sinlaßanschluß (2) ist,- that the direction of rotation of the cylinder (5) is parallel to the feed direction of the pulp through the inlet connection (2), - daß die Richtung, in der der Rückstand durch den Auslaßanschluß (4) abgeführt wird, dieselbe ist wie die Drehrichtung des Zylinders (5) und- that the direction in which the residue is discharged through the outlet connection (4) is the same as the direction of rotation of the cylinder (5) and - daß der Zylinder (5) dadurch profiliert ist, daß an seiner Außenfläche (24) Rippen (29) angebracht sii}d,- that the cylinder (5) is profiled by having ribs (29) attached to its outer surface (24), 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet/ daß die Rippen (29) im wesentlichen aus vorderflächen (25), die geneigt von der Außenfläche (24) des Zylinders (5) abstehen, und aus Endflächen (27) bestehen, die zu der Außenfläche (24) der Rippen (29) senkrecht stehen.4. Device according to claim 3, characterized in that the ribs (29) consist essentially of front surfaces (25) which protrude at an angle from the outer surface (24) of the cylinder (5) and of end surfaces (27) which are perpendicular to the outer surface (24) of the ribs (29). 5. Vorrichtung nach den Ansprüchen 3 oder 4, dadurch gekennzeichnet,5. Device according to claims 3 or 4, characterized in daß die Rippen in bezug auf die Achse (7) des Zylinders (5) geneigt sind.that the ribs are inclined with respect to the axis (7) of the cylinder (5). 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Neigungswinkel der Rippen zwischen -45° und +45° liegt.6. Device according to claim 5, characterized in that the angle of inclination of the ribs is between -45° and +45°. 7. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Öffnungen am Zylinder entweder Löcher oder Schlitze sind.7. Device according to claim 3, characterized in that the openings on the cylinder are either holes or slots. 8. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Differenz zwischen der Umfangsgeschwindigkeit des Zylinders und der Zuführgeschwindigkeit der Fasersuspension 2 bis 8 m/sec beträgt.8. Device according to claim 3, characterized in that the difference between the peripheral speed of the cylinder and the feed speed of the fiber suspension is 2 to 8 m/sec. 9. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß einer der Flügel (6), der einen positiven oder negativen Druckstoß erzeugt, +10 - 45° neben dem Anschluß 4 für den Rückstand angebracht ist.9. Device according to claim 3, characterized in that one of the vanes (6) which generates a positive or negative pressure surge is mounted +10 - 45° next to the connection 4 for the residue. 10. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß einer der Flügel (6), der einen positiven oder negativen Druckstoß erzeugt, +10 - 45° neben dem Anschluß (2) für eine Zufuhr der Pulpe angebracht ist,10. Device according to claim 3, characterized in that one of the wings (6) which generates a positive or negative pressure surge is mounted +10 - 45° next to the connection (2) for supplying the pulp,
DE198888100678T 1987-01-19 1988-01-19 METHOD AND DEVICE FOR SEPARATING NODES. Pending DE275967T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI870190A FI76139C (en) 1987-01-19 1987-01-19 Twigs separation method and apparatus

Publications (1)

Publication Number Publication Date
DE275967T1 true DE275967T1 (en) 1989-06-01

Family

ID=8523793

Family Applications (2)

Application Number Title Priority Date Filing Date
DE8888100678T Revoked DE3866116D1 (en) 1987-01-19 1988-01-19 METHOD AND DEVICE FOR SEPARATING NODES.
DE198888100678T Pending DE275967T1 (en) 1987-01-19 1988-01-19 METHOD AND DEVICE FOR SEPARATING NODES.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE8888100678T Revoked DE3866116D1 (en) 1987-01-19 1988-01-19 METHOD AND DEVICE FOR SEPARATING NODES.

Country Status (6)

Country Link
EP (1) EP0275967B1 (en)
JP (2) JPH0696834B2 (en)
AT (1) ATE69472T1 (en)
CA (1) CA1329333C (en)
DE (2) DE3866116D1 (en)
FI (1) FI76139C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4308225C1 (en) * 1993-03-16 1994-11-24 Escher Wyss Gmbh Process for sorting fiber suspension and screening device for carrying it out
SE515589C2 (en) * 1999-03-10 2001-09-03 Valmet Fibertech Ab Screening device for separating fiber suspensions, and stator for use in the screening device
US6254729B1 (en) 1999-03-22 2001-07-03 Voith Sulzer Paper Technology North America, Inc. Pulper with extraction plate assembly having removable inserts and method of manufacturing same
JP4909693B2 (en) * 2006-07-24 2012-04-04 相川鉄工株式会社 Screen device
FI20095769A (en) * 2009-07-07 2011-01-08 Andritz Oy Apparatus for handling a fiber suspension

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH182068A (en) * 1935-03-21 1936-01-31 Miag Muehlenbau & Ind Ag Classifier for fiber-containing goods, in particular for paper making materials.
SE315479B (en) * 1963-10-21 1969-09-29 Knutsilplatar Malm N Ab
US3363759A (en) * 1964-04-29 1968-01-16 Bird Machine Co Screening apparatus with rotary pulsing member
DE1905832U (en) * 1964-09-16 1964-12-03 Hermann Finckh G M B H SECURE FOR PAPER FABRIC SUSPENSIONS.
SE316363B (en) 1966-12-01 1969-10-20 Karlstad Mekaniska Ab
SE374148B (en) * 1972-08-31 1975-02-24 S E E Ahlfors
US3947314A (en) 1974-04-29 1976-03-30 The Black Clawson Company Method of treating paper fibers in a stationary screen
US4017387A (en) * 1975-08-11 1977-04-12 The Black Clawson Company Screening apparatus
SE427124B (en) 1980-01-28 1983-03-07 Celleco Ab DEVICE FOR FILING OF FIBER PASS PENSIONS
SE426958B (en) * 1980-02-25 1983-02-21 Celleco Ab SEPARATOR FOR DIVISION OF AN INCOMING MIXTURE OF CELLULOSA SUSPENSION OR SIMILAR AND GROUND HEAVY PARTICLES
DE3572928D1 (en) * 1984-12-25 1989-10-19 Mitsubishi Heavy Ind Ltd Pressure slit screen
JPS61207069A (en) * 1985-03-12 1986-09-13 Nec Corp semiconductor equipment
JPS61207689A (en) * 1985-03-12 1986-09-16 三菱重工業株式会社 Screening apparatus
JPS61207690A (en) * 1985-03-12 1986-09-16 三菱重工業株式会社 Screening apparatus

Also Published As

Publication number Publication date
CA1329333C (en) 1994-05-10
EP0275967A3 (en) 1989-02-08
FI76139C (en) 1988-09-09
DE3866116D1 (en) 1991-12-19
JPH0533280A (en) 1993-02-09
EP0275967B1 (en) 1991-11-13
JPS63249792A (en) 1988-10-17
ATE69472T1 (en) 1991-11-15
FI76139B (en) 1988-05-31
FI870190A0 (en) 1987-01-19
JPH0696834B2 (en) 1994-11-30
EP0275967A2 (en) 1988-07-27

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