EP4644605B1 - Pulperrotor - Google Patents

Pulperrotor

Info

Publication number
EP4644605B1
EP4644605B1 EP25165820.9A EP25165820A EP4644605B1 EP 4644605 B1 EP4644605 B1 EP 4644605B1 EP 25165820 A EP25165820 A EP 25165820A EP 4644605 B1 EP4644605 B1 EP 4644605B1
Authority
EP
European Patent Office
Prior art keywords
pulper
pulper rotor
rotor body
insert
flange
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.)
Active
Application number
EP25165820.9A
Other languages
English (en)
French (fr)
Other versions
EP4644605A1 (de
Inventor
Jonne NÄKKI
Pekka Pekkonen
Joni PIIPONNIEMI
Illya SARVI
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.)
Valmet Technologies Oy
Original Assignee
Valmet Technologies Oy
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 Valmet Technologies Oy filed Critical Valmet Technologies Oy
Publication of EP4644605A1 publication Critical patent/EP4644605A1/de
Application granted granted Critical
Publication of EP4644605B1 publication Critical patent/EP4644605B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G11/00—Disintegrating fibre-containing articles to obtain fibres for re-use
    • D01G11/04—Opening rags to obtain fibres for re-use
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers
    • D21B1/347—Rotor assemblies

Definitions

  • the present invention relates to pulper rotors for pulpers used in connection with pulp handling for fiber web production. More especially the invention relates to a pulper rotor according to the preamble part of claim 1.
  • a typical production and treatment line comprises a forming section comprising a head box and a forming unit and a press section as well as a subsequent drying section and a reel-up.
  • the production and treatment line can further comprise other devices and sections for finishing the fiber web, for example, a size press, a calender, a coating section.
  • the production and treatment line also comprises typically at least one winder for forming customer rolls as well as a roll packaging apparatus.
  • pulpers In pulping sections connected to the fiber web production lines using recycled material, in pulpers bales of recycled material are broken and defibered to fiber pulp; in vertical or horizontal pulpers for repulping of baled pulps.
  • a vertical pulper is typically used, when homogeneous slushing results with low energy consumption are needed, while a horizontal pulper, with its low height requirement, is typically used for rebuilds where limited space is available.
  • the pulpers comprise a rotating pulper rotor with vanes to break and to defiber the baled pulp. In the pulper, i.e.
  • pulper rotor is disassembled from the pulper and taken into a repair location, as the pulper rotor with the vanes is made of a single cast piece. This is also cumbersome, as the pulper rotors are heavy machine parts, diameter of them is typically about 2 meters. Further, for each pulper typically at least two pulper rotors have been provided, one for operation during repair of the other.
  • the pumping fins and blades of the rotor using plates are separately prefabricated and then connected to the hub.
  • the fins need to be repaired and changed, which is time-consuming as it requires that the attachment welds are removed, which can take even one workday, and then the fins taken to be repaired.
  • the welds need to be removed and new fins and blades attached by welding.
  • Other examples of rotors are disclosed in EP 1036877 A1 and DE 3925098 A1 .
  • An object of the invention is to create a pulper rotor, in which the disadvantages and problems of prior art pulper rotor designs relating to changeability of profiles of the vanes of the pulper rotor are eliminated or at least minimized.
  • the pulper rotor comprises a pulper rotor body, which has a center hub and from the outer circumference of the center hub extending a plurality of wings, wherein the pulper rotor further comprises a plurality of insert vanes, each of the insert vanes is removably attached to the pulper rotor body at the respective wings thereof and the insert vanes are attached to the pulper rotor body by a formfitting attachment.
  • insert vane comprises two flanges formed in the support element: a hub flange and a wing flange and the hub flange is attached on the center hub of the pulper rotor body by a screw attachment and the wing flange s attached on the wing of the pulper rotor body by a screw attachment.
  • the pulper rotor body comprises for each insert vane at least one key and at least one groove, and each of the insert vanes comprise correspondingly at least one key slot and at least one protrusion, and the keys and the grooves of the pulper rotor body are formfitting with the key slots and the protrusions of the insert vanes.
  • the keys and the grooves of the pulper rotor body located at wings of the pulper rotor body.
  • the keys are located at outer tip ends of the wings.
  • the hub flange has screw openings and the pulper rotor body has at the center hub corresponding screw openings, through which openings of the center hub and of the hub flange screws or bolts are fastened
  • the wing flange has screw openings and the pulper rotor body has at the wings corresponding screw openings, through which openings of the wings and of the wing flange screws or bolts are fastened.
  • the screw openings of the flange/-s have an upwards opening wider cavity for heads of the screws or bolts.
  • caps are provided for closing the cavities when the screws or bolts are in place.
  • the pulper rotor vanes are made of separate insert vanes to be fastened to the pulper rotor body.
  • inserts are easy to manage and only the inserts need to be replaced after wear to have the pulper again in operational condition.
  • significant time savings are achieved.
  • the inserts can be made of more wear-resistant material than the pulper rotor body and thus, cost-savings in material costs are achieved.
  • the functional dimensioning of the insert vanes can be varied to provided different operational parameters merely by replacing the insert vanes with ones with different functional parameters. For example, the height of the vanes has an effect to the energy consumption of the pulper and thus, by optimizing the height of the vanes optimal operating conditions and energy consumption can be achieved.
  • the fastening of the insert vanes to the pulper rotor body comprises a screw mounting and a formfitting fastening between the insert vanes and the respective part of the pulper rotor body, which secures the fastening as well as the correct location of the insert vanes on the pulper rotor body. Furthermore, the formfitting fastening receives any tensional forces and thus, the screw mounting is not affected by tension loads.
  • the pulper rotor 10 has a pulper rotor body 15, which has a center hub 12 from the outer circumference of the center hub 12 extending a plurality of wings 14.
  • the center hub 12 may also comprise a center opening 11.
  • the center hub 12 is provided for attaching the pulper rotor body 15 to a drive for rotating the rotor.
  • the attachment is a screw attachment with from above attached screws to the screw openings 120.
  • the rotor body 15 with its wings 14 is formed as one unity, for example of a thick plate material.
  • the center hub 12 is elevated or not from the upper surface level of the other parts of the pulper rotor body 15.
  • the pulper rotor 10 further comprises a plurality of insert vanes 20. Each of the insert vanes 20 is removably attached to the pulper rotor body 15 at the respective wings 14 thereof. Rotating direction of the pulper rotor 10 is indicated by an arrow S, i.e. in the example the direction of the rotation is counterclockwise.
  • Each insert vane 20 has an upwards extending blade 22 on a support element 21.
  • each insert vane 20 has a blade 22 and a support element 21.
  • the blade 22 is vertical and the support element 21 is horizontal and the blade 22 extends upwards from the support element 21 in use position of the pulper.
  • the support element 21 can extend in rotation direction of the pulper rotor 10 frontwards in respect of the blade 22.
  • Each insert vane 20 comprise at least one flange 12; 23 formed on the support element 21. In the example of the figures there are two flanges 23; 24 formed in the support element 21: a hub flange 23 for attachment to the elevated center hub 12 and a wing flange 24 for attachment to the outer circumferential part of the pulper rotor body 15.
  • the hub flange 23 is attached on the center hub 12 of the pulper rotor body 15 by a screw attachment, the hub flange 23 has screw openings 26 and the pulper rotor body 15 has at the center hub 12 corresponding screw openings 16, through which openings 16, 26 of the center hub 12 and of the hub flange 23 screws or bolts are fastened.
  • the flange 24 is attached on the corresponding wing 14 of the pulper rotor body 15 by a screw attachment, the wing flange 24 has screw openings 26 and the pulper rotor body 15 has at the corresponding wing 14 corresponding screw openings 17, through which openings 17, 27 of the wings 12 and of the wing flange 24 screws or bolts are fastened.
  • the openings 26, 27 of the flanges 23, 24 have an upwards opening wider cavity 26A, 27A for heads of the screws or bolts.
  • caps for closing the cavities, when the screws or bolts are in place may be provided to prevent wear of the screw of bolt heads and fouling of the screw attachments.
  • the caps may be attached by small attachment spot welds, which are easily removed by cutting.
  • the screws or bolts are advantageously made of stainless steel. In case the pulper rotor body 15 is level only one flange is needed and the flange is correspondingly attached by a screw attachment to the pulper rotor body 15.
  • the plurality of wings 14 and the plurality of insert vanes 20 are located spaced apart extending at the outer circumferential edge of the pulper rotor body 15.
  • the insert vanes 20 extend at least over half the length of the wing 14, advantageously substantially over the length of the wing 14.
  • the pulper rotor body 15 at the wings 14 and the insert vanes 20 also a formfitting attachment is provided, as show also more detailed in figures 2A-2B .
  • the pulper rotor body 15 comprises at each wing 14 a key 19 and a groove 18.
  • the keys 19 are located at outer tip ends of the wings 14 and the keys 19 extend over less than half of the length of the wings 14.
  • the insert vanes 20 comprise correspondingly a key slot 28 and a protrusion 29, as can be seen from fig. 3B .
  • the key 19 and the groove 18 at the wing 14 are formfitting with the key slot 28 and the protrusion 29.
  • the formfitting attachment between the pulper rotor body 15 and the insert vanes 20 may also comprise in the pulper rotor body 15 more than one keys 19 and/or more grooves 18, and respectively the insert vanes 20 comprises more key slots 28 and protrusions 29.
  • the formfitting attachment also receives the forces exerted and thus, the screw attachment is prevented from these.
  • the formfitting attachment the support between the pulper rotor body 15 and the insert vanes 20 provides supporting corresponding to that achieved by welding.
  • the insert vanes 20 are advantageously made by casting, or by welding from wrought plate material, and finalizing the forms as required by chip removing machining.
  • the insert vanes 20 are advantageously of wear-resistant material, for example of martensitic or duplex stainless-steel material.
  • Advantageously other parts of the pulper rotor 10 are made of steel grade like1.4162, 1.4462, 1.4313, 1.4418 or 1.4542 according to the standard EN 10088-1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)

Claims (13)

  1. Stofflöserrotor (10) mit einem Stofflöserrotorkörper (15), der eine zentrale Nabe (12) aufweist und von dem Außenumfang der zentralen Nabe (12) sich eine Vielzahl von Flügeln (14) erstreckt, wobei der Stofflöserrotor (10) ferner eine Vielzahl von Einsatzschaufeln (20) aufweist, wobei jede der Einsatzschaufeln (20) lösbar an dem Stofflöserrotorkörper (15) an dem jeweiligen Flügel (14) desselben befestigt ist und wobei die Einsatzschaufeln (20) an dem Stofflöserrotorkörper (15) durch eine formschlüssige Befestigung befestigt sind, dadurch gekennzeichnet, dass der Stofflöserrotorkörper (15) für die formschlüssige Befestigung für jede Einsatzschaufel (20) mindestens einen Keil (19) und mindestens eine Nut (18) umfasst, und jede der Einsatzschaufeln (20) entsprechend mindestens einen Keilschlitz (28) und mindestens einen Vorsprung (29) umfasst, und dass die Keile (19) und die Nuten (18) des Stofflöserrotorkörpers (15) mit den Keilschlitzen (28) und den Vorsprüngen (29) der Einsatzschaufeln (20) formschlüssig sind.
  2. Stofflöserrotor (10) nach Anspruch 1, dadurch gekennzeichnet, dass jede Einsatzschaufel (20) ein Blatt (22) und ein Stützelement (21) aufweist und dass sich das Blatt (22) von dem Stützelement (21) nach oben erstreckt.
  3. Stofflöserrotor (10) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass jede Einsatzschaufel (20) mindestens einen Flansch (23; 24) aufweist, der am Stofflöserrotorkörper (15) durch eine Schraubbefestigung angebracht ist.
  4. Stofflöserrotor (10) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass jede Einsatzschaufel (20) zwei in dem Stützelement (21) ausgebildete Flansche (23; 24) aufweist: einen Nabenflansch (23) und einen Flügelflansch (24), und dass der Nabenflansch (23) durch eine Schraubbefestigung an der mittleren Nabe (12) des Stofflöserrotorkörpers (15) befestigt ist und dass der Flügelflansch (24) durch eine Schraubbefestigung an dem Flügel (14) des Stofflöserrotorkörpers (15) befestigt ist.
  5. Stofflöserrotor (10) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Keile (19) und die Nuten (18) des Stofflöserrotorkörpers (15) an den Flügeln (14) des Stofflöserrotorkörpers (15) angeordnet sind.
  6. Stofflöserrotor (10) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Keile (19) an den äußeren Spitzen der Flügel (14) angeordnet sind.
  7. Stofflöserrotor (10) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sich die Keile (19) über weniger als die Hälfte der Länge der Flügel (14) erstrecken.
  8. Stofflöserrotor (10) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Einsatzschaufeln (20) durch Gießen hergestellt sind.
  9. Stofflöserrotor (10) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Einsatzschaufeln (20) aus verschleißfestem Material, vorteilhaft aus martensitischem oder Duplex-Edelstahl, bestehen.
  10. Stofflöserrotor (10) nach einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, dass zur Schraubbefestigung der Flansch (23; 24) Schrauböffnungen (26; 27) und der Stofflöserrotorkörper (15) entsprechende Schrauböffnungen (16; 17) aufweist, durch die hindurch (16, 26; 17, 27) Schrauben oder Bolzen befestigt werden.
  11. Stofflöserrotor (10) nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass zur Schraubbefestigung der Nabenflansch (23) Schrauböffnungen (26) und der Stofflöserrotorkörper (15) an der mittleren Nabe (12) entsprechende Schrauböffnungen (16) aufweist, durch die Öffnungen (16, 26) der mittleren Nabe (12) und des Nabenflansches (23) Schrauben oder Bolzen befestigt sind, und der Flügelflansch (24) Schraubenöffnungen (27) aufweist und der Stofflöserrotorkörper (15) an den Flügeln (14) entsprechende Schraubenöffnungen (17) aufweist, durch die Öffnungen (17, 27) der Flügel (14) und des Flügelflansches (24) Schrauben oder Bolzen befestigt sind.
  12. Stofflöserrotor (10) nach Anspruch 11, dadurch gekennzeichnet, dass die Schraubenöffnungen (26, 27) des/des Flansches/Flansche (23, 24) einen sich nach oben öffnenden breiteren Hohlraum (26A, 27A) für die Köpfe der Schrauben oder Bolzen aufweisen.
  13. Stofflöserrotor (10) nach Anspruch 12, dadurch gekennzeichnet, dass Kappen zum Verschließen der Hohlräume (26A, 27A) vorgesehen sind, wenn die Schrauben oder Bolzen angebracht sind.
EP25165820.9A 2024-04-29 2025-03-25 Pulperrotor Active EP4644605B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20245532A FI131934B1 (en) 2024-04-29 2024-04-29 Lookup rotor

Publications (2)

Publication Number Publication Date
EP4644605A1 EP4644605A1 (de) 2025-11-05
EP4644605B1 true EP4644605B1 (de) 2026-01-21

Family

ID=95065259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP25165820.9A Active EP4644605B1 (de) 2024-04-29 2025-03-25 Pulperrotor

Country Status (3)

Country Link
EP (1) EP4644605B1 (de)
CN (1) CN120867125A (de)
FI (1) FI131934B1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885745A (en) * 1973-11-19 1975-05-27 Somat Corp Waste pulping machine with replaceable shear members
DE3925098C2 (de) * 1989-07-28 2000-12-14 Ask High Technology Tech Entwi Vorrichtung zum Zerkleinern von Material, sogenannter Turboseparator
US5451004A (en) * 1993-09-08 1995-09-19 Somat Corporation Integrated waste pulping and liquid extraction system
SE509293C2 (sv) * 1997-04-29 1999-01-11 Cellwood Machinery Ab Anordning vid massaupplösare
DE59901791D1 (de) * 1999-03-05 2002-07-25 Voith Paper Patent Gmbh Rotor mit einem Verschleiss-Schutz für einen Stoffauflöser
DE20208439U1 (de) * 2002-05-31 2003-10-09 Voith Paper Patent GmbH, 89522 Heidenheim Schraubelement sowie Verbindungsteile zum Drehen des Schraubelementes
JP5028672B2 (ja) * 2007-05-23 2012-09-19 ボイス パテント ゲーエムベーハー 古紙裁断用ロータ
CN207079415U (zh) 2017-08-15 2018-03-09 维美德技术有限公司 碎浆机转子及碎浆机

Also Published As

Publication number Publication date
FI20245532A1 (en) 2025-10-30
EP4644605A1 (de) 2025-11-05
CN120867125A (zh) 2025-10-31
FI131934B1 (en) 2026-02-25

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