EP3256640A1 - Garniture de raffinage - Google Patents

Garniture de raffinage

Info

Publication number
EP3256640A1
EP3256640A1 EP15808576.1A EP15808576A EP3256640A1 EP 3256640 A1 EP3256640 A1 EP 3256640A1 EP 15808576 A EP15808576 A EP 15808576A EP 3256640 A1 EP3256640 A1 EP 3256640A1
Authority
EP
European Patent Office
Prior art keywords
grinding
mahlleisten
division
arrangement according
bars
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
EP15808576.1A
Other languages
German (de)
English (en)
Other versions
EP3256640B1 (fr
Inventor
Martin Schmid
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.)
Voith Patent GmbH
Original Assignee
Voith Patent 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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP3256640A1 publication Critical patent/EP3256640A1/fr
Application granted granted Critical
Publication of EP3256640B1 publication Critical patent/EP3256640B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • D21D1/306—Discs

Definitions

  • the invention relates to a grinding arrangement for grinding of water-suspended pulp fibers between two Mahlspalt forming and relatively rotating grinding surfaces, which are formed by Mahlleisten and intervening grooves, wherein the Mahlleisten extend at least with the essential direction component radially with respect to the axis of rotation.
  • pulp fibers i. To mill fresh pulp and / or waste paper fibers in order to achieve the desired properties, in particular in terms of strength, formation and surface in the fibrous web produced therefrom.
  • the refining surfaces used for this purpose because of the relatively rapid wear of the grinding surfaces, are formed by interchangeable grinding sets bolted to the corresponding support surface.
  • the grinding sets must be optimally adapted to the pulp to be treated, also to prevent excessive wear of the sets.
  • the object of the invention is therefore to improve the efficiency of the fiber treatment.
  • this object is achieved in that the distance of the radially inner end of all Mahlleisten at least one grinding surface of the axis of rotation by a maximum of 10%, based on the radial maximum length of the grinding bars, with each other and share some of the Mahlleisten radially outward.
  • this allows a full utilization of the grinding surface and on the other hand, the divisions of Mahlleisten generate turbulence in the suspension to be treated, which improves the entry of the fibers into the treatment gap or between the Mahlleisten.
  • additional turbulence in the suspension can be generated solely by the fact that the radially inner end of all Mahlleisten at least one grinding surface is different distances from the axis of rotation. Again, the turbulence support the collection of the suspension to be treated between the grinding bars.
  • mill strips alternate in the circumferential direction at a short distance and at a long distance from the axis of rotation.
  • the division takes place at least some Mahlleisten at least one grinding surface with a different distance from the axis of rotation. This can emanating from the divisions of Mahlleisten Inhomogeneities are extended to the largest possible radial region, which counteracts uneven wear. It is particularly advantageous if the distance of the pitch to the axis of rotation in the circumferential direction of the grinding surface continuously increases or decreases.
  • the distance between the dividing grinding bars should increase steadily radially outward in a division section following the division.
  • the opening gap between the grinding bars increases the cutting edge length, which has a correspondingly positive effect on the treatment.
  • the dividing section extends over a length between 10 and 50 mm.
  • the grinding bars In order to produce as constant as possible a cutting angle of the grinding bars, the grinding bars should extend as far as possible parallel outside the dividing sections. For this purpose, it is helpful if at least one of the divided grinding bars is curved after a division section following the division.
  • Mahlleisten To create gradual transitions in the distribution of Mahlleisten, it is advantageous if some, preferably all Mahlleisten share in two grinding bars.
  • FIG. 1 shows a schematic cross section through a grinding arrangement
  • Figure 2 a grinding plate
  • FIG. 3 shows a section according to FIG. 2 and FIG.
  • Figure 4 another grinding plate.
  • a grinding gap 1 is formed by a fixed grinding surface 2 coupled to the housing and a grinding surface 3 rotating about a rotation axis 6.
  • the rotating grinding surface 3 is here moved by a rotatably mounted in the housing shaft 7 in the direction of rotation.
  • This shaft 7 is driven by a drive also provided in the housing.
  • the fiber suspension S to be ground passes through an inlet through the center into the grinding gap 1 between the two grinding surfaces 2, 3.
  • the fiber suspension S passes through the cooperating grinding surfaces 2,3 radially outward and leaves the adjoining annular space through a drain.
  • Both grinding surfaces 2, 3 are each formed by a plurality of refining plates, as shown in FIGS. 2 and 4, which extend over in each case one circumferential segment of the corresponding refining surface 2, 3.
  • the refining plates yield a continuous grinding surface 2, 3.
  • the refining plates and thus also the grinding surfaces 2, 3 are formed, as shown in FIGS. 2 to 4, by a multiplicity of essentially radially extending grinding bars 4 and grooves 5 located therebetween.
  • Mahlleisten 4 also called knife
  • Mahlleisten 4 is generally rectangular, but there are other forms.
  • the grooves 5 extending between the milling strips 4 likewise have a rectangular cross-section and serve as flow channels for the fiber suspension S.
  • the groove depth is usually between 2 and 20 mm.
  • Essential to the invention here is that the distance between the radially inner end of all grinding bars 4 both grinding surfaces of the rotation axis 6 by a maximum of 10%, based on the radial maximum length of the grinding bars 4, with each other. Disregarded here are interruptions of Mahlleisten 4, as required in the segmentation of the grinding surface in refining plates or holes 8 for the attachment of the refining plates.
  • the distance between the graduation and the axis of rotation 6 increases continuously in small increments in the circumferential direction of the grinding surface, so that the circumferentially adjacent divisions run in a spiral.
  • the length of the dividing section 9 is between 10 and 50 mm.
  • all the grinding bars 4 can each split into two grinding bars 4.
  • FIG. 4 also shows the possibility that a grinding bar 4 divides radially one after the other several times into two grinding bars 4 in each case.
  • the grinding bars 4 run parallel outside the dividing sections 9, wherein in particular the non-dividing grinding bars 4 according to FIG. 4 can have one or more bends.
  • the width of all grinding bars 4 outside the, following a division following division sections 9 is the same size.
  • the width of the grooves 5 between the grinding bars 4 outside the, following a division following division sections 9 is the same size.
  • milling strips 4 alternate here in the circumferential direction with a short distance and with a long distance to the axis of rotation 6.

Landscapes

  • Crushing And Grinding (AREA)
  • Paper (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

L'invention concerne un dispositif de raffinage destiné à raffiner des fibres de cellulose en suspension aqueuse entre deux surfaces de raffinage (2, 3) formant un interstice de raffinage (1) et en rotation l'une par rapport à l'autre, lesquelles sont formées par des baguettes de raffinage (4) et des rainures (5) qui s'étendent entre elles. Les baguettes de raffinage (4) s'étendent dans le sens radial par rapport à l'axe de rotation (6), au moins avec la composante directionnelle principale. L'invention a pour objet d'améliorer le rendement en ce que la distance entre l'extrémité radiale intérieure de toutes les baguettes de raffinage (4) d'au moins une surface de raffinage respective et l'axe de rotation (6) présente une différence mutuelle maximale de 10 %, rapportée à la longueur maximale des baguettes de raffinage (4), et certaines des baguettes de raffinage (4) se séparent vers l'extérieur dans le sens radial.
EP15808576.1A 2015-02-10 2015-12-11 Garniture de raffinage Active EP3256640B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015202318.4A DE102015202318A1 (de) 2015-02-10 2015-02-10 Mahlgarnitur
PCT/EP2015/079376 WO2016128092A1 (fr) 2015-02-10 2015-12-11 Garniture de raffinage

Publications (2)

Publication Number Publication Date
EP3256640A1 true EP3256640A1 (fr) 2017-12-20
EP3256640B1 EP3256640B1 (fr) 2018-11-21

Family

ID=54849922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15808576.1A Active EP3256640B1 (fr) 2015-02-10 2015-12-11 Garniture de raffinage

Country Status (6)

Country Link
EP (1) EP3256640B1 (fr)
CN (1) CN107109789B (fr)
DE (2) DE102015202318A1 (fr)
ES (1) ES2710324T3 (fr)
PT (1) PT3256640T (fr)
WO (1) WO2016128092A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017120162A1 (de) * 2017-09-01 2019-03-07 Voith Patent Gmbh Konische Mahlanordnung
US11643779B2 (en) * 2019-12-13 2023-05-09 Andritz Inc. Refiner plate having grooves imparting rotational flow to feed material
CN114438810B (zh) * 2022-01-24 2023-12-29 丹东鸭绿江磨片有限公司 一种具有狭管齿型的磨片或磨盘及磨浆机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US100537A (en) * 1870-03-08 Improved mill-stone dress
US3059863A (en) * 1959-04-06 1962-10-23 Bolton John W & Sons Inc Segmental filling for refiner plugs
KR20010106423A (ko) * 1998-08-19 2001-11-29 추후 시케인을 갖춘 정제기 플레이트
DE102012214980A1 (de) * 2012-08-23 2014-02-27 Voith Patent Gmbh Kegelrefiner
CN203200584U (zh) * 2013-03-27 2013-09-18 杭州江菱造纸机械设备厂 新型节能磨浆机低压磨片
CN204224912U (zh) * 2014-09-05 2015-03-25 福伊特专利有限公司 一种造纸磨浆用的磨片

Also Published As

Publication number Publication date
ES2710324T3 (es) 2019-04-24
EP3256640B1 (fr) 2018-11-21
DE102015202318A1 (de) 2016-08-11
DE202015009379U1 (de) 2017-05-02
PT3256640T (pt) 2019-02-12
CN107109789B (zh) 2019-12-20
WO2016128092A1 (fr) 2016-08-18
CN107109789A (zh) 2017-08-29

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