EP1462566B1 - Procédé et dispositif pour le broyage des fibres - Google Patents

Procédé et dispositif pour le broyage des fibres Download PDF

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Publication number
EP1462566B1
EP1462566B1 EP04006320A EP04006320A EP1462566B1 EP 1462566 B1 EP1462566 B1 EP 1462566B1 EP 04006320 A EP04006320 A EP 04006320A EP 04006320 A EP04006320 A EP 04006320A EP 1462566 B1 EP1462566 B1 EP 1462566B1
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EP
European Patent Office
Prior art keywords
beating
rolls
pulp
grooves
roll
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 - Fee Related
Application number
EP04006320A
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German (de)
English (en)
Other versions
EP1462566A3 (fr
EP1462566A2 (fr
Inventor
Helmuth Dipl.-Ing. Dr. Gabl
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.)
Andritz AG
Original Assignee
Andritz AG
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Filing date
Publication date
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Publication of EP1462566A2 publication Critical patent/EP1462566A2/fr
Publication of EP1462566A3 publication Critical patent/EP1462566A3/fr
Application granted granted Critical
Publication of EP1462566B1 publication Critical patent/EP1462566B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • 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
    • D21D1/02—Methods of beating; Beaters of the Hollander type
    • D21D1/18—Beaters with two or more beater rolls

Definitions

  • the invention relates to a method for grinding fibrous materials between two milling surfaces and to an apparatus for carrying out the method.
  • the best possible strength use of all types of fibrous materials (wood pulp, annual plants, animal, etc.) allows a more cost-effective production of papers, leather, etc.
  • the fibers must be treated by means of a so-called grinding, so that the binding properties of the fibers by appropriate measures come to fruition.
  • This process has traditionally been carried out in so-called "Dutch", large cylindrical, discontinuous machines. Due to lack of throughput and high specific energy consumption, these machines have been replaced by continuous refiner. Refiners are currently being made in the design of the (double) disc, cone or cylinder.
  • the surface roughening and crushing of the fiber material requires these high differential speeds with simultaneous pressing of the pulp. Most of the energy is lost in frictional heat. According to the literature, only about 3 to 10% of the energy used for fiber treatment.
  • the DE 443 537 describes a Holées-Mahlgeschirr for pulp, while the grinding roller and the rotatable base with intermeshing grinding elements in the form of ribs, blocks, pins, spikes o. The like. Provided and comminuted the ground between your flanks.
  • the DE 10 06 250 and the FR 773 591 also disclose grinding devices for the treatment of paper pulp, while the pulp is fed in the form of a paper pulp suspension of the refining.
  • the invention is further characterized in that the speed difference of the Mahlober vom in the range of - 5 m / s and +12 m / s, advantageously the differential speed is almost zero. This can achieve a high economic advantage by reducing the idle power by up to about 90%.
  • the low differential speed also allows a targeted introduction of compressive forces on the single fiber or the fiber composite whereby a Quetschmahlung is achieved.
  • squeeze grinding were already exploited with the use of the first grinding mills, they could never be integrated industrially in continuous process stages.
  • two or more grinding operations are carried out in succession. The advantage of a serial Circuit is seen in increased use of existing fiber strength potential.
  • a favorable embodiment of the invention is characterized in that the pulp is evenly distributed over the grinding zone.
  • the large surface created coupled with a large uniformity of the fiber distribution both in web transverse and longitudinal and Z direction leads to a high fiber hit probability with the advantage of uniform fiber treatment using the strength potential of as many individual fibers, ie the total strength level can be used to a large extent.
  • the pulp is fed directly from a thickening machine of the grinding machine.
  • the technical and economic benefits are similar to those already mentioned.
  • investment is reduced, making the process easier to design.
  • the invention also relates to a device for carrying out the method, wherein rolls are provided as grinding bodies. It is characterized in that the material supply takes place by means of a separate web guide until just before the grinding zone.
  • the advantage is in a continuous operation, which can be dispensed with pre-aggregates. Another advantage is a reduction in investment costs and space requirements.
  • a particularly advantageous embodiment of the invention is characterized in that the rollers are driven at the same speed / have the same speed.
  • the advantage lies in a very low effort for frictional force with intensive introduction of adjustable pressing forces. The low frictional force caused by the almost non-existent relative speed reduces the energy requirements for rail transport and Quetschmahlung to almost zero.
  • roller pairs are provided with a wide grinding gap, wherein the roller (s) for generating the wide Mahlspaltes may have a shoe support or a beam support. Due to the wide grinding gap design, the forces on the one hand gentler intervention while extending the residence time.
  • a favorable embodiment of the invention is characterized in that the rollers have spikes. The sting increase the "clothing surface" and allow for better penetration and treatment of the fiber material.
  • An advantageous development of the invention is characterized in that the rolls have grooves or grooves, wherein the grooves or grooves can extend in the circumferential direction or at an angle to the roll axis.
  • the increase in the roll surface by means of grooves, grooves, etc. has the advantage that the number of individual fibers achieved and thus treated is increased.
  • An advantageous embodiment of the invention is characterized in that the grooves or grooves interlock. If meshing becomes possible due to the shape design - positive locking - there is no differential speed. The entire energy consumption is reduced or converted into a kind of pressing grinding. This leads to a maximum use of raw materials in terms of development of strength with the least possible increase in drainage resistance.
  • the grooves or grooves are trapezoidal
  • the bottom of the grooves or grooves may have drainage depressions. Residual water - eg at low inlet material densities - escapes into the depressions and can be sucked out or thrown out of these depressions.
  • Residual water - eg at low inlet material densities - escapes into the depressions and can be sucked out or thrown out of these depressions.
  • This has the advantage that higher solids concentrations occur in the milling zone.
  • a necessary process stage can be omitted, or higher final dry contents can be achieved.
  • the energy requirements for a subsequent thickening stage or thermal drying can be reduced.
  • a favorable embodiment of the invention is characterized in that the rollers have a drive.
  • a follower wire, rubber or the like is a follower wire, rubber or the like. Braid provided, wherein this encloses at least one roller or guided over deflection rollers and can be pressed against at least one roller.
  • Fig. 1 a schematic representation of the invention
  • Fig. 2 a schematic side view of a variant of the invention
  • Fig. 3 a schematic side view of another variant of the invention
  • Fig. 4 a schematic side view of a next variant of the invention
  • Fig. 5 an embodiment of the invention
  • Fig. 6 and Fig. 7 represent further variants of the invention.
  • Roller speed, nip length, roller distance, differential speed, contact pressure, surface structure and material properties determine the reaction time of the grinding force on the material to be ground.
  • extended refining or extended retention refining (ERR) can also be used for the grinding application, which can increase the exposure time / meal many times over.
  • one or more rolls can be arranged in series. These illustrated arrangements apply to both low and high consistency milling.
  • any kind of shoe or beam support can follow in series and at short intervals.
  • These rolls can use a flexible, pneumatically, hydraulically mounted substructure to improve and increase the Mahlleich choirkeit.
  • the support shoe can be guided with support bodies, which have lubrication openings such as bores, sintered metals used for the passage of the lubricant (water, air, oil, etc.) for sliding support.
  • the design of the roll surface is the design of the roll surface. This can be performed by one or two sides smooth, provided with spikes or with wave-like grooves. These grooves, grooves can run in the circumferential direction (see Fig.) Or at an angle to transverse to the roll axis direction.
  • the rollers have circumferential grooves which interlock.
  • the depths of the grooves is according to the pulp, the web thickness and the Solids content selected.
  • Advantageous are trapezoidal depressions with a groove depth of 1 to 25 mm.
  • the groove base can be provided with drainage depressions - eg additional holes for drainage similar to a suction roll principle in a press section of a paper machine.
  • the grooves can be milled, ground, etched, eroded or raised produced in the roll body.
  • a simple raised groove design which allows different geometries due to the selected wire shape, can be done by means of winding.
  • a second pressure roller, a running wire, rubber, etc. braid enclose the roll body and provide by means of additional contact pressure for a long-term contusion.
  • rollers with smaller diameters will be used for highest fiber squeezing.
  • a band consisting of a wire or rubber mesh can be pressed against the roll or extend over several rolls.
  • the roller peripheral speed - or a possibly set differential speed - depends among other things also on the roller surface.
  • Rolls which have grooves and ridges at a regular circumferential spacing such as corrugating rolls in wave production, prove to be of great advantage.
  • These grooves run parallel or at an angle of 0 ° to 45 ° to the roll axis (helical gearing): They can be interrupted in the circumferential direction, which allows short-term and easy drainage especially at low concentrations of substance. This favors the grinding.
  • the flank design of the grooves may in turn have small so-called Unterriefen. Since the grinding treatment is based on an intensive crushing, also MahlSystemgrund Siemensen are similar to a perforated roll. In the case of a perforated surface structure, an additional dewatering process takes place during the grinding process.
  • the holes can be executed as blind holes.
  • the rollers can be operated at adjustable different speeds.
  • the surfaces themselves are made of very hard material to maintain long life.
  • the grinding elements on the roll body can be mounted in segments or be single and retractable elements that are made of high-quality steels or ceramic.
  • steel alloys such as those currently used in Refinem are suitable. All materials can additionally be surface alloyed.
  • different materials for the pressure rollers can be used in combination. The use of materials with different degrees of hardness or material allows an enlargement of the grinding zone, which in turn favors the desired Quetschmahlung. In this machine concept, the idle drive power drops to approx. 3 - 5% of conventional grinding systems, the total energy requirement to achieve the same strengths below 50%. In addition, opacity and other optical properties are better preserved compared to conventional milling.
  • the capacity of these grinding plants is a function of the working width and the area-related mass of the preceding distributor.
  • the working widths of the grinding machines can be easily adapted to a specific production by changing the Stoffverteilbreite.
  • the untreated web introduced into the refining gap has in most cases a weight of 100 to 1500 g / m 2 . This applies to both LC (low consistency) and MC (middle consistency) and HC (high consistency) grinds.
  • the area-related mass can be adapted to the respective raw material.
  • the material feed to the grinding zone takes place by means of its own web guide, which extends to just before the grinding zone.
  • the aim is to obtain a uniform distribution of the ground material in the grinding zone.
  • the substance is not thickened in this case, but could be brought to a higher substance density level, but only distributed uniformly over the grinding zone.
  • the grinding is carried out directly after a thickening machine.
  • the fiber material to be treated can be fed directly from the thickening machine to the grinding machine. This is especially true for the fabric treatment with higher consistencies.
  • high-consistency milling is used in this type of milling treatment.
  • the consistency range can vary widely (advantageously 25% to 65% dry content - limited only by mechanical dewatering) and is essentially dependent on the raw material, the basis weight of the fiber web and its pretreatment.
  • Hardwood, Recycled grades require a higher consistency than softwood pulps.
  • the pulp is passed through a gap as in the case of Niederkonsistenzmahlung and squeezed in this by targeted pressing of the rolls and control of the roll speeds primarily.
  • the inner and outer surface is enlarged and bond activated.
  • Fig. 1 schematically shows a device according to the invention.
  • the grinding plant 1 here consists of a roller 2 and a roller 3, which are driven by means of motor 4 and 5 respectively.
  • the drive is performed at the same speed, so that the material to be ground, here in the form of a web 6, is subjected only to pressing but no shear forces.
  • the intended web guide is not shown.
  • Fig. 3 shows a plant analog Fig. 2 , However, there are here two grinding devices 1, 1 'with grinding rollers 2, 3 and 2', 3 'arranged one behind the other.
  • Fig. 4 shows an embodiment with a so-called central grinding roller 10, which has to absorb the forces of the other two rollers 11, 12. The advantage of such an arrangement is a compact design.
  • Fig. 5 shows a variant of the invention, in which a running wire, rubber or the like. braid 13, the roller 2 encloses. As a result, a long-term crushing of the pulp can be achieved.
  • Fig. 6 is shown a further variant of the invention, wherein a running wire, rubber or the like. Braid 13 'is provided, which is guided over deflecting rollers 14, 14'. The wrap a of the roller 2 can be from 0 ° (point contact pressure) up to about 350 °.
  • Fig. 5 shows a variant of the invention, in which a running wire, rubber or the like. braid 13, the roller 2 encloses. As a result, a long-term crushing of the pulp can be achieved.
  • Fig. 6 is shown a further variant of the invention, wherein a running wire, rubber or the like. Braid 13 'is provided, which is guided over deflecting rollers 14, 14'. The wrap a of the roller 2 can be from 0 ° (point contact pressure) up

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  • Paper (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Crushing And Grinding (AREA)

Claims (24)

  1. Procédé de raffinage pour pâtes de cellulose entre deux surfaces de raffinage, la pâte de cellulose étant amenée à la zone de raffinage sous forme d'une nappe et des forces de compression agissant sur la nappe de pâte de cellulose, caractérisé en ce que la vitesse différentielle des surfaces de raffinage se situe entre -5 m/s et +12 m/s et la nappe est guidée par un guidage séparé (8, 9) jusqu'à un lieu directement devant la zone de raffinage (7).
  2. Procédé selon la revendication 1, caractérisé en ce que la vitesse différentielle est près de zéro.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que deux ou plusieurs raffinages ont lieu l'un après l'autre.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la pâte de cellulose se trouve distribuée uniformément à travers la zone de raffinage.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la pâte de cellulose se trouve alimentée au raffineur directement à partir d'un épaississeur.
  6. Dispositif de raffinage pour pâtes de cellulose sous forme d'une nappe entre deux surfaces de raffinage, des rouleaux (2, 3, 2', 3', 10, 11, 12) étant prévus comme corps de raffinage, les rouleaux étant pressables l'un à l'autre, caractérisés en ce que l'alimentation de pâte de cellulose a lieu par un guidage de nappe séparé (8, 9) jusqu'à un lieu directement devant la zone de raffinage (7) formée par les rouleaux.
  7. Dispositif selon la revendication 6, caractérisé en ce que les rouleaux (2, 3, 2', 3') sont actionnés à la même vitesse.
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que les rouleaux (2, 3, 2', 3', 10, 11, 12) sont actionnés à la même vitesse de surface.
  9. Dispositif selon l'une des revendications 6 à 8, caractérisé en ce que les rouleaux (2, 3, 2', 3', 10, 11, 12) sont actionnés à la même vitesse de surface mais à un nombre de tours différent.
  10. Dispositif selon l'une des revendications 6 à 9, caractérisé en ce que des paires de rouleaux (2, 3, respectivement 2', 3',) à une fente de raffinage large sont pourvus.
  11. Dispositif selon la revendication 10, caractérisé en ce que le rouleau ou les rouleaux a/ont un support du type soulier afin de créer la fente large.
  12. Dispositif selon la revendication 10, caractérisé en ce que le rouleau ou les rouleaux a/ont un support du type poutre afin de créer la fente large.
  13. Dispositif selon l'une des revendications 6 à 12, caractérisé en ce que les rouleaux (2, 3, 2', 3', 10, 11, 12) ont des épines.
  14. Dispositif selon l'une des revendications 6 à 12, caractérisé en ce que les rouleaux (2, 3, 2', 3', 10, 11, 12) ont des cannelures ou des rainures.
  15. Dispositif selon la revendication 14, caractérisé en ce que les cannelures ou rainures sont disposées en direction circonférentielle.
  16. Dispositif selon la revendication 15, caractérisé en ce que les cannelures ou rainures sont disposées à un angle à l'axe du rouleau.
  17. Dispositif selon l'une des revendications 14 à 16, caractérisé en ce que les cannelures ou rainures s'engrènent.
  18. Dispositif selon l'une des revendications 14 à 17, caractérisé en ce que les cannelures ou rainures ont une forme trapézoïdale.
  19. Dispositif selon l'une des revendications 14 à 18, caractérisé en ce que les fonds des cannelures ou rainures ont des empreintes de déshydratation.
  20. Dispositif selon l'une des revendications 6 à 19, caractérisé en ce que la surface des rouleaux a une rugosité définie.
  21. Dispositif selon l'une des revendications 6 à 20, caractérisé en ce que la pâte de cellulose est alimentée vers le raffineur directement à partir d'un épaississeur.
  22. Dispositif selon l'une des revendications 6 à 21, caractérisé en ce qu'un enlacement mouvant (13, 13') en fil métallique ou caoutchouc est prévu.
  23. Dispositif selon la revendication 22, caractérisé en ce que l'enlacement mouvant (13, 13') en fil métallique ou caoutchouc cerne un rouleau (2) au moins.
  24. Dispositif selon la revendication 22, caractérisé en ce que l'enlacement mouvant (13, 13') en fil métallique ou caoutchouc est guidé au-dessus de rouleaux de déflection (14, 14') et est pressé contre un rouleau (2, 2', 2", 2"') au moins.
EP04006320A 2003-03-26 2004-03-17 Procédé et dispositif pour le broyage des fibres Expired - Fee Related EP1462566B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0047703A AT412483B (de) 2003-03-26 2003-03-26 Verfahren und vorrichtung zur mahlung von faserstoffen
AT4772003 2003-03-26

Publications (3)

Publication Number Publication Date
EP1462566A2 EP1462566A2 (fr) 2004-09-29
EP1462566A3 EP1462566A3 (fr) 2004-10-13
EP1462566B1 true EP1462566B1 (fr) 2011-01-12

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EP04006320A Expired - Fee Related EP1462566B1 (fr) 2003-03-26 2004-03-17 Procédé et dispositif pour le broyage des fibres

Country Status (8)

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US (1) US20040251338A1 (fr)
EP (1) EP1462566B1 (fr)
CN (1) CN100591844C (fr)
AT (1) AT412483B (fr)
BR (1) BRPI0400779A (fr)
CA (1) CA2460252C (fr)
DE (1) DE502004012102D1 (fr)
NO (1) NO331561B1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2278065A1 (fr) 2009-07-24 2011-01-26 Stichting Dienst Landbouwkundig Onderzoek Raffineur de pâte et procédé de traitement de matériau de pâte fibreuse
CN114007750B (zh) * 2019-01-05 2024-03-19 康瑞Ip私人有限公司 用于粉碎的设备、系统和方法
CN111841738B (zh) * 2020-07-27 2022-07-08 内蒙古九鹏建设有限公司 建筑垃圾处理装置
CN113546741B (zh) * 2021-07-20 2022-09-16 北京养心堂化妆品有限公司 一种用于化妆品的植物精油提取设备
CN113713904B (zh) * 2021-09-03 2022-10-04 湖南尔旭智造科技有限公司 一种用于水性涂料加工的干粉砂浆研磨装置
CN114192227A (zh) * 2021-12-03 2022-03-18 湖南博邦农林科技股份有限公司 一种茶油深加工的临界萃取工艺方法及其设备

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Publication number Priority date Publication date Assignee Title
DE443537C (de) 1924-01-25 1927-04-30 Ulrich Kirchner Hollaender-Mahlgeschirr fuer Papierstoff
FR773591A (fr) 1933-06-09 1934-11-21 Neyret Beylier Atel Procédé pour le broyage, le raffinage et l'hydratation des fibres
US2509147A (en) * 1946-02-15 1950-05-23 Perkins & Son Inc B F Apparatus for and method of conditioning textile fibers
US2890493A (en) * 1953-11-25 1959-06-16 Fibrofelt Corp Method and means for defibering materials
DE1006250C2 (de) 1954-06-16 1957-09-19 Ernst Unger Mahlvorrichtung zur Aufbereitung von Papierfaserstoffen
US3310244A (en) * 1965-03-18 1967-03-21 Abington Textile Mach Works Load cell for crushing rolls
US3454970A (en) * 1965-09-22 1969-07-15 Lionel M Sutherland Apparatus and process for washing a pulp web
DE3132210A1 (de) * 1981-08-14 1983-03-03 Draiswerke Gmbh, 6800 Mannheim "walzwerk zum zerkleinern von fluessigen stoffen"
FI73472C (fi) * 1984-04-03 1991-01-01 Kevytrakenne Oy Karda.
US4826555A (en) * 1986-02-28 1989-05-02 Miply Equipment, Inc. Method and apparatus for compressing a self-supported web
US4953795A (en) * 1988-10-24 1990-09-04 Beloit Corporation Wood chip cracking apparatus
JPH0779968B2 (ja) * 1992-04-17 1995-08-30 巴工業株式会社 植物繊維質原料の微粉末化方法及びその方法に使用する加圧ロール装置
FI942616A (fi) * 1994-06-03 1995-12-04 Valmet Corp Paperirainan esipuristin
US5475903A (en) * 1994-09-19 1995-12-19 American Nonwovens Corporation Composite nonwoven fabric and method
DE19631638A1 (de) * 1996-08-05 1998-02-12 Voith Sulzer Papiermasch Gmbh Pressenanordnung
DE19652545B4 (de) * 1996-12-17 2006-03-23 Voith Sulzer Papiermaschinen Gmbh Preßwalze zum Behandeln bahnförmigen Gutes
AT404946B (de) * 1997-07-01 1999-03-25 Andritz Patentverwaltung Vorrichtung zur entwässerung von feststoff-flüssigkeitssuspensionen, insbesondere faserstoffsuspensionen
FI20010721A (fi) * 2001-04-06 2002-10-07 Metso Paper Inc Puristintelan hihna ja puristinkonsepti

Also Published As

Publication number Publication date
EP1462566A3 (fr) 2004-10-13
CN1534135A (zh) 2004-10-06
AT412483B (de) 2005-03-25
CA2460252A1 (fr) 2004-09-26
CA2460252C (fr) 2012-01-03
NO20041083L (no) 2004-09-27
BRPI0400779A (pt) 2005-01-11
ATA4772003A (de) 2004-08-15
DE502004012102D1 (de) 2011-02-24
NO331561B1 (no) 2012-01-23
CN100591844C (zh) 2010-02-24
EP1462566A2 (fr) 2004-09-29
US20040251338A1 (en) 2004-12-16

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