WO1999054046A1 - Segment de disque raffineur - Google Patents

Segment de disque raffineur Download PDF

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Publication number
WO1999054046A1
WO1999054046A1 PCT/FI1999/000308 FI9900308W WO9954046A1 WO 1999054046 A1 WO1999054046 A1 WO 1999054046A1 FI 9900308 W FI9900308 W FI 9900308W WO 9954046 A1 WO9954046 A1 WO 9954046A1
Authority
WO
WIPO (PCT)
Prior art keywords
teeth
segment
ring
refiner
refiner disk
Prior art date
Application number
PCT/FI1999/000308
Other languages
English (en)
Inventor
Kai Vikman
Original Assignee
Metsä-Serla Oyj
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 Metsä-Serla Oyj filed Critical Metsä-Serla Oyj
Priority to AU34233/99A priority Critical patent/AU3423399A/en
Publication of WO1999054046A1 publication Critical patent/WO1999054046A1/fr

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/11—Details
    • B02C7/12—Shape or construction of discs

Definitions

  • the present invention relates to a refiner disk segment according to the preamble of claim 1 for making mechani- cal fiber mass used in the manufacture of paper or board.
  • the manufacture of mechanical pulp and mass by grinding requires substantial amounts of energy. Energy is consumed as mechanical drive power of the refiner and as process steam. The refiner is rotated by electrical power, and frequently also the required steam is generated by electricity, which means high specific energy consumption of electricity. During grinding, a major fraction of energy is converted into steam.
  • the high specific energy consumption is basically caused by three reasons: 1) the entire process operates at an inferior efficiency, whereby energy is converted into heat; 2) due to the low efficiency of the process, the released heat must be conducted away, whereby cooling is carried out using steam introduced into the refiner after being generated with electrical energy, so naturally energy must be consumed in steam generation; and 3) steam is also used for transporting the fiber mass in the refiner.
  • the pressure and temperature in the refiner disk gaps reach high values with pressures exceeding 7 bar (0.7 Mpa) , which requires both the refiner and the process to be dimensioned to take the load of high forces.
  • Refiner pressure and temperature also affect the fiber quality and physiological properties, and with increasing pressure and temperature, also the fiber brightness decreases and the content of nonsolubles (COD) increases. Also the fiber distribution becomes difficult to manage. The dwell time of fibers in the refiner is long, which is an indication of inferior efficiency.
  • a refiner employed in the manufacture of mechanical mass comprises two opposed refiner disks.
  • the cutting surfaces of the refiner disks are composed of replaceable segments in which the grinding/refining teeth form grooves and ridges.
  • One disk of the refiner has an opening in the center of its support shaft via which the material (typically chips) to be ground is passed into the refiner.
  • the clearance between the refiner disks is largest at the center of the disks and narrows toward the perimeter thus effecting a gradually higher degree of material defibering.
  • the grooves and ridges of the refiner disk teeth can be aligned radially or inclined at an oblique angle with the disk radius. Downstream smooth inclination of the grooves, that is, at a backward angle with the direction of disk rotation will reduce the energy consumption, while inclination of the grooves toward the direction of rotation increases the rotational load of the refiner disks.
  • refiner disks with radial grooves prepare a long-fiber mass suitable for use in high-strength paper grades.
  • Refiner disks with obliquely running grooves respectively prepare a short-fiber mass of finer distribution for high-quality paper grades of good printability.
  • the effect of refiner disk groove orientation may not necessarily be essential to the fiber composition of mechanical mass, but rather, other factors will determine the type of mass obtained from the refiner.
  • Specific energy consumption is very high in a refiner with radial refiner disk grooves.
  • a refiner with obliquely inclined refiner disk grooves has a smaller specific energy consumption and the disk grooves cause a centrifugal pump effect capable of transporting fibers radially outward in the gap between the refiner disks. Then, the amount of steam used for transporting the fibers can be reduced and also the overall energy consumption is lower. Due to the pumping effect, the dwell time of fiber mass is shorter and a brighter mass is obtained due to the shorter dwell time, lower grinding pressure and lower temperature.
  • US Pat. No. 5,362,003 discloses a refiner segment having the segment radially divided in at least two refining zones, whereby the angle of the refining grooves with the disk radius is in each radial zone made different from that of the adjacent zone.
  • a relatively large angle with the disk radius is used, while in the outer zone an almost radial angle is used.
  • the inner refining zones are imparted a centrifugal pump property which gives a reduced specific energy consumption.
  • the goal of the invention is achieved by forming the grooves and ridges of the refiner disk segment from curved continuous arc portions inclined forward in relation to the direction of rotation of the refiner disk.
  • the segment is divided into at least two zones.
  • refiner disk segment according to the invention is characterized by what is stated in the 4
  • the invention offers significant benefits.
  • the most important advantage of the invention is a substantial reduction of specific energy consumption. According to tests performed, up to 15 % specific energy reduction is possible in a first-stage refiner; and if the invention is applied to all the refining stages, the savings attainable will increase correspondingly. Additionally, in refiners using a two-stage, turbine-like construction of the refiner disk segment, the radial acceleration component of finer mass can be increased, whereby a further reduction of specific energy consumption will be attained. The dwell time of the fiber mass in the refiner will be shortened due to the higher radial acceleration, whereby also the amount of steam required for finer mass transport is reduced, and simultaneously, the loss of fiber mass brightness is smaller and the amount of nonsolubles is lowered.
  • Teeth with the shape of continuous, smoothly-curved arcs provide a substantially higher centrifugal pumping force over that available by means of obliquely inclined straight teeth.
  • Figure 1 shows an embodiment of the invention in a top view
  • Figure 2 shows in a cross-sectional view of the embodiment illustrated in Fig. 1.
  • a refiner disk segment representing a circumferential segment part of a refiner disk surface.
  • the full ring of the refining disk surface is assembled from a set of these segments.
  • a single segment is delineated by an outer edge 11 forming the outer circumference, an inner edge 12 forming the inner circumference and radially straight ends 13 joining the ends of said portions of segment inner/outer circumference.
  • the segments are mounted in place by means of bolts screwed into threaded holes.
  • the refiner disk segment shown in Figs. 1 and 2 is formed by two ring portions 1, 2, of which the inner ring portion is a large-toothed grinding ring 1 and the outer is a small-toothed ring acting as the refining ring 2 proper.
  • the radial width of the grinding ring 1 is narrower than that of the refining ring 2, thus making the dwell time of the fibrous material being ground therefrom in the region of the grinding ring 1 shorter than in the region of the refining ring 2.
  • the teeth 3 of the grinding ring are relatively large and arranged from separate teeth into kind of a saw in order to obtain more efficient grinding of chips.
  • Each tooth 3 is contoured into a continuous smoothly-curved arc so that the inner side of the concave arcuate tooth is toward the direction of rotation of the refiner disk.
  • the radial alignment of the arcuate tooth in relation to the radius 4 of the grinding ring is such that the arcuate shape of the tooth converges toward the radius 7 in the radial direction.
  • the angle of the tangent of the tooth arc becomes smaller in the radial direction.
  • the inner ring 1 is followed by an intermediary ring 6 serving to guide the ground material to the outer ring 2.
  • the curved shape orientation of the teeth is changed to be convex in relation to the direction of rotation of the refiner disk and the tangent of the tooth shape with the radius 7 approaches a right angle toward the perimeter of the outer ring.
  • the tangential angle of the teeth of the refining ring 2 in relation to the disk radius 7 increases with the radial distance from the refiner disk center.
  • the tangent of the tooth 4 is already almost square with the radius.
  • This arrangement gives the fiber mass leaving the refining ring a high radial velocity inasmuch the curved teeth 4 by virtue of their shape eject and propel radially outward the fiber mass contained in the space between the opposed refining rings.
  • This shaping of the refining ring tooth results in a reduced specific energy consumption because of backward-inclined orientation of the teeth 4 in relation to the direction of rotation of the refiner disk and because of the higher radial transport velocity of the fiber mass resulting in a shorter dwell time and reduced steam consumption for fiber mass transport. Owing to the same reasons, also the energy required for preparing a given amount of fiber mass is reduced.
  • the outer ring in the described embodiment is formed by two rings of teeth of differently arcuate shapes, it may as well comprise only a single interleaved ring of teeth having a suitably dimensioned curvature and radial change of teeth curvature.
  • Both the thickness and lateral height of the teeth in the first and second rings are varied along the disk radius.
  • the clearance between the refiner disks changes.
  • the clearance between the teeth of the opposed refiner disks may be 5 mm at the inner peri - eter of the grinding ring and taper to about 1 - 2 mm at the outer perimeter of the ring.
  • the segment and the base surface thereof on which the teeth are mounted must be conical as shown in Fig. 2.
  • the purpose of the tapering clearance and radially decreasing height of the teeth 3, 4 is to provide a gradually finer defibering of the processed material toward the outer perimeter of the refiner disk.
  • the groove 5 between the teeth 4 of the grinding ring 2 becomes narrower and shallower radially outward, while the width of the groove 8 between the teeth of the refining ring 1 stays constant radially outward with a simultaneously decreasing depth of the groove.
  • grinding ring 1 which is the tooth surface facing the direction of rotation of the refiner disk, may be slanted laterally, and the teeth 3 may have notches that divide the tooth rings into periods.
  • Such a slanted surface and notched arrangement of the teeth help eject the material away from the intertooth spaces via the gap 8 formed between the teeth 3, whereby the material is subjected to regrinding.
  • the material flow in the radial direction takes place in a similar manner as in a multistage turbine.
  • the exiting flow hits, after being guided by the teeth 3 via the intermediary ring 6 , the reaction vanes formed by the teeth 4 of the second ring 2 , whereby the inertial energy of the flow imparts a thrust on the teeth of the second ring 2 in the direction of rotation of the refiner disk, thus reducing the need of installed drive power for rotating the refiner.
  • a similar effect can be attained by using a number of concentric refiner disk segments in which the flow is controlled in a corresponding fashion.
  • the present invention may have alternate embodiments.
  • the curved shape of the teeth of ring segments and the curvature thereof that determines the shape of the intertooth grooves may be varied.
  • the teeth of the outer ring may be oriented smoothly in the direction of disk rotation so as to impart the exiting material a maximally high radial velocity while 9
  • the teeth of the outer ring are formed with a gapless continuously curved shape, because any discontinuities in the tooth shape may interrupt the smooth material flow and cause unnecessary turbulence in the flow.
  • the shape of the curved tooth is made variable so that, e.g., the tooth on one ring are formed by gaplessly end-to-end connected curved arc portions.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un segment de disque raffineur servant dans la production de papier ou de carton. Ce segment comporte une partie de segment périphérique d'une surface de disque raffineur, cette partie de segment étant délimitée par un bord extérieur (11) formant son pourtour extérieur, un bord intérieur (12) formant son pourtour intérieur, et des extrémités radialement droites (13) joignant les extrémités desdites parties du pourtour intérieur/extérieur du segment. La surface du segment de disque raffineur comporte des dents (3, 4) montées sur celle-ci et séparées par des sillons (5, 8), au moins un anneau (2) étant formé par ces dents (3, 4) de façon à raffiner la matière à traiter. Les dents (4) d'au moins un anneau (2) sont formées par au moins une partie arc en forme d'arc continu, dirigée en avant dans le sens de rotation du disque, de façon à donner à la matière sortante une vitesse radiale élevée en direction du pourtour (11) du segment.
PCT/FI1999/000308 1998-04-16 1999-04-14 Segment de disque raffineur WO1999054046A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU34233/99A AU3423399A (en) 1998-04-16 1999-04-14 Refiner disk segment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI980848 1998-04-16
FI980848A FI108052B (fi) 1998-04-16 1998-04-16 Jauhinsegmentti

Publications (1)

Publication Number Publication Date
WO1999054046A1 true WO1999054046A1 (fr) 1999-10-28

Family

ID=8551526

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1999/000308 WO1999054046A1 (fr) 1998-04-16 1999-04-14 Segment de disque raffineur

Country Status (3)

Country Link
AU (1) AU3423399A (fr)
FI (1) FI108052B (fr)
WO (1) WO1999054046A1 (fr)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001037998A2 (fr) * 1999-11-23 2001-05-31 Durametal Corporation Plaques de raffineur dotees d'une admission d'injecteur
EP1158088A2 (fr) * 2000-05-26 2001-11-28 Voith Paper Patent GmbH Procédé et dispositif pour le traitement de suspensions fibreuses
EP1239074A1 (fr) * 2001-03-08 2002-09-11 Voith Paper Patent GmbH Procede pour la preparation de papier satine
WO2003066962A1 (fr) * 2002-02-02 2003-08-14 Voith Paper Patent Gmbh Procede pour la preparation de fibres contenues dans une suspension fibreuse
US7191967B2 (en) 2003-06-18 2007-03-20 Metso Paper, Inc. Refiner
EP1806450A1 (fr) * 2006-01-09 2007-07-11 Andritz Inc. Disques pour raffineur à ailettes ayant des angles d' avancement variables et procédé de raffinage
EP1806451A1 (fr) * 2006-01-09 2007-07-11 Andritz Inc. Disque pour raffineur muni d' ailettes en forme de V et procédé de raffinage
US7322539B2 (en) 2002-07-02 2008-01-29 Metso Paper, Inc. Refining surface for a refiner for defibering material containing lignocellulose
WO2009136846A1 (fr) * 2008-05-06 2009-11-12 Metso Paper, Inc. Segment de raffinage pour le traitement de pâte avec un agencement de déflecteurs fixés aux surfaces de lames
US7913942B2 (en) 2006-01-30 2011-03-29 Metso Paper, Inc. Refiner
WO2011107339A1 (fr) * 2010-03-01 2011-09-09 Voith Patent Gmbh Procédé de broyage de fibres de cellulose dans une suspension aqueuse et garnitures de broyage pour sa mise en œuvre
EP2668330A1 (fr) * 2011-01-27 2013-12-04 Metso Paper, Inc. Raffineur et élément lame
EP2243879A3 (fr) * 2009-04-23 2014-02-19 Andritz, Inc. Plaque de dépastilleur et procédés correspondants
EP2971339A4 (fr) * 2013-03-12 2016-08-10 Valmet Oy Disque central de raffineur de pâte
CN109397120A (zh) * 2018-10-30 2019-03-01 陕西科技大学 一种等距弧形齿磨盘设计方法
WO2019136069A1 (fr) * 2018-01-02 2019-07-11 International Paper Company Appareil et procédé pour le traitement de fibres ligneuses
EP3550072A1 (fr) * 2018-04-03 2019-10-09 Andritz Inc. Plaques de dispersion avec engrènement de dents et section d'affinage externe
US10794003B2 (en) 2018-01-02 2020-10-06 International Paper Company Apparatus and method for processing wood fibers
CN111974499A (zh) * 2020-06-10 2020-11-24 南通华严磨片有限公司 一种双功能磨片
WO2020263296A1 (fr) * 2019-06-28 2020-12-30 International Paper Company Appareil et procédé pour le traitement de fibres de bois
US11001968B2 (en) 2018-01-02 2021-05-11 International Paper Company Apparatus and method for processing wood fibers
US11421382B2 (en) 2018-01-02 2022-08-23 International Paper Company Apparatus and method for processing wood fibers
KR20220143861A (ko) * 2021-04-16 2022-10-25 안드리츠 인코포레이티드 유동-변경 리파이너 세그먼트

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103911897B (zh) * 2014-04-01 2015-12-16 宁波市圣盾机械制造有限公司 一种造纸磨浆机用磨片

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997023291A1 (fr) * 1995-12-21 1997-07-03 Sunds Defibrator Industries Ab Element de raffinage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997023291A1 (fr) * 1995-12-21 1997-07-03 Sunds Defibrator Industries Ab Element de raffinage

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001037998A3 (fr) * 1999-11-23 2002-01-03 Durametal Corp Plaques de raffineur dotees d'une admission d'injecteur
WO2001037998A2 (fr) * 1999-11-23 2001-05-31 Durametal Corporation Plaques de raffineur dotees d'une admission d'injecteur
EP1158088A2 (fr) * 2000-05-26 2001-11-28 Voith Paper Patent GmbH Procédé et dispositif pour le traitement de suspensions fibreuses
EP1158088A3 (fr) * 2000-05-26 2003-01-22 Voith Paper Patent GmbH Procédé et dispositif pour le traitement de suspensions fibreuses
EP1239074A1 (fr) * 2001-03-08 2002-09-11 Voith Paper Patent GmbH Procede pour la preparation de papier satine
WO2003066962A1 (fr) * 2002-02-02 2003-08-14 Voith Paper Patent Gmbh Procede pour la preparation de fibres contenues dans une suspension fibreuse
US7322539B2 (en) 2002-07-02 2008-01-29 Metso Paper, Inc. Refining surface for a refiner for defibering material containing lignocellulose
US7191967B2 (en) 2003-06-18 2007-03-20 Metso Paper, Inc. Refiner
EP1806451A1 (fr) * 2006-01-09 2007-07-11 Andritz Inc. Disque pour raffineur muni d' ailettes en forme de V et procédé de raffinage
JP2007182660A (ja) * 2006-01-09 2007-07-19 Andritz Inc リファイナープレート、ディスパージャープレートおよびリファイニング方法
EP2476804A1 (fr) * 2006-01-09 2012-07-18 Andritz Inc. Plaques à disperger dentaire dotées de dents en forme de V
US7478773B2 (en) 2006-01-09 2009-01-20 Andritz Inc. Tooth refiner plates having V-shaped teeth and refining method
EP1806450A1 (fr) * 2006-01-09 2007-07-11 Andritz Inc. Disques pour raffineur à ailettes ayant des angles d' avancement variables et procédé de raffinage
CN101922125B (zh) * 2006-01-09 2012-07-04 安德里兹有限公司 具有v形齿的齿形精磨机板
US7913942B2 (en) 2006-01-30 2011-03-29 Metso Paper, Inc. Refiner
WO2009136846A1 (fr) * 2008-05-06 2009-11-12 Metso Paper, Inc. Segment de raffinage pour le traitement de pâte avec un agencement de déflecteurs fixés aux surfaces de lames
US8197643B2 (en) 2008-05-06 2012-06-12 Metso Paper Inc Refining segment for pulp processing with a deflector arrangement attached at the bars surfaces
EP2243879A3 (fr) * 2009-04-23 2014-02-19 Andritz, Inc. Plaque de dépastilleur et procédés correspondants
RU2527795C2 (ru) * 2009-04-23 2014-09-10 Андритц Инк. Пластина дефлокулятора и соответствующие способы
WO2011107339A1 (fr) * 2010-03-01 2011-09-09 Voith Patent Gmbh Procédé de broyage de fibres de cellulose dans une suspension aqueuse et garnitures de broyage pour sa mise en œuvre
EP2668330A1 (fr) * 2011-01-27 2013-12-04 Metso Paper, Inc. Raffineur et élément lame
EP2668330A4 (fr) * 2011-01-27 2014-01-01 Metso Paper Inc Raffineur et élément lame
EP2971339A4 (fr) * 2013-03-12 2016-08-10 Valmet Oy Disque central de raffineur de pâte
US9943852B2 (en) 2013-03-12 2018-04-17 Valmet Ab Center plate in a pulp refiner
US11001968B2 (en) 2018-01-02 2021-05-11 International Paper Company Apparatus and method for processing wood fibers
US11421382B2 (en) 2018-01-02 2022-08-23 International Paper Company Apparatus and method for processing wood fibers
US11982054B2 (en) 2018-01-02 2024-05-14 International Paper Company Apparatus and method for processing wood fibers
US11905658B2 (en) 2018-01-02 2024-02-20 International Paper Company Apparatus and method for processing wood fibers
WO2019136069A1 (fr) * 2018-01-02 2019-07-11 International Paper Company Appareil et procédé pour le traitement de fibres ligneuses
CN111630225A (zh) * 2018-01-02 2020-09-04 国际纸业公司 加工木材纤维的设备和方法
US10794003B2 (en) 2018-01-02 2020-10-06 International Paper Company Apparatus and method for processing wood fibers
US11643778B2 (en) 2018-04-03 2023-05-09 Andritz Inc. Disperser plates with intermeshing teeth and outer refining section
US11174592B2 (en) 2018-04-03 2021-11-16 Andritz Inc. Disperser plates with intermeshing teeth and outer refining section
CN110344277A (zh) * 2018-04-03 2019-10-18 安德里茨公司 带有交错的齿和外侧磨浆区的热分散机磨盘
EP3550072A1 (fr) * 2018-04-03 2019-10-09 Andritz Inc. Plaques de dispersion avec engrènement de dents et section d'affinage externe
CN109397120A (zh) * 2018-10-30 2019-03-01 陕西科技大学 一种等距弧形齿磨盘设计方法
CN109397120B (zh) * 2018-10-30 2020-07-28 陕西科技大学 一种等距弧形齿磨盘设计方法
WO2020263296A1 (fr) * 2019-06-28 2020-12-30 International Paper Company Appareil et procédé pour le traitement de fibres de bois
CN111974499A (zh) * 2020-06-10 2020-11-24 南通华严磨片有限公司 一种双功能磨片
KR20220143861A (ko) * 2021-04-16 2022-10-25 안드리츠 인코포레이티드 유동-변경 리파이너 세그먼트
KR102549155B1 (ko) 2021-04-16 2023-06-30 안드리츠 인코포레이티드 유동-변경 리파이너 세그먼트

Also Published As

Publication number Publication date
FI980848A (fi) 1999-10-17
FI980848A0 (fi) 1998-04-16
FI108052B (fi) 2001-11-15
AU3423399A (en) 1999-11-08

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