WO2010028711A1 - Verfahren zur mahlung von wässrig suspendierten zellstofffasern sowie mahlgarnitur zu seiner durchführung - Google Patents
Verfahren zur mahlung von wässrig suspendierten zellstofffasern sowie mahlgarnitur zu seiner durchführung Download PDFInfo
- Publication number
- WO2010028711A1 WO2010028711A1 PCT/EP2009/004739 EP2009004739W WO2010028711A1 WO 2010028711 A1 WO2010028711 A1 WO 2010028711A1 EP 2009004739 W EP2009004739 W EP 2009004739W WO 2010028711 A1 WO2010028711 A1 WO 2010028711A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grinding
- openings
- suspension
- edges
- stator
- Prior art date
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
- D21D1/303—Double disc mills
-
- 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
- D21D1/22—Jordans
-
- 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
- D21D1/22—Jordans
- D21D1/26—Jordan bed plates
-
- 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 method according to the preamble of claim 1.
- pulp fibers i. H. Frischzellstoff- or waste paper fibers
- Milling methods of the type considered here use grinding tools, which are often provided with strips called knives and can be screwed to the rotor or stator of the grinding device usually.
- the grinding tools are usually referred to as trimmings.
- Mahlrefiner The corresponding machines are called Mahlrefiner.
- the process can typically be carried out in disc refiners and cone refiners.
- Refiner sets for grinding pulp fibers with grinding bars and grooves in between are e.g. known from DE 20 2005 007 551 U1.
- the invention is based on the object to provide a method for pulp grinding, with which it is possible, the grinding economically and particularly to perform uniformly, ie that the desired Mahltechnchten changes in all fibers are as equal as possible.
- the grooves are to be regarded as flow channels for the suspension. It can be assumed that as a result of the rotational movement of the rotor and the pulp suspension entrained by it, a strong pressure build-up takes place from the radially inner to the radially outer regions. Similar processes also occur in centrifugal pumps, of course in much stronger form. Due to this pressure difference, a back flow of the suspension takes place in the non-rotating inventively provided cavities of the stator from radially outside to radially inside. This backflow can be influenced by the choice or change of the cross sections and flow surfaces.
- Figure 2 the implementation of the method using the example of a Scheibenrefiners
- Figure 3 Example of a Mahlgarnitur invention (sector) in the direction of the back
- FIG. 4-9 Details of various designs of stator fittings
- FIG. 10 shows a sector of a usable rotor-side grinding set in plan view
- FIG. 11 shows further shapes for the openings in the stator assembly
- FIG. 12 shows the implementation of the method with a cone refiner.
- FIG. 1 shows, on the basis of a schematic sketch, the suspension flows which, when the method according to the invention is carried out, are established in a double-disc refiner having a rotor 9 and two stators 8 and 8 ' .
- the slurry S to be ground is supplied in the central region of the double-disc refiner, passes between the rotor 9 and the stators 8 and 8 ' and is guided to the outside, where it is ground.
- the rotor movement is thereby a strong pressure build-up on the way from the inlet side 5 to the discharge side 6, that is from radially inward to radially outward.
- the ground portion S " flows from the annular space 17 through a nozzle.
- a suitable for the process disc refiner is shown schematically in section.
- On a stator 8 is a Mahlgarnitur 1 and on a rotor 9, a grinding set 2 releasably secured by means of screws 12.
- the rotor-side grinding sets 1 are knife sets, which are provided with grinding strips 7.
- the suspension S to be grounded passes through the center of the stator 8 to the feed side 5 of the grinding sets 1 and 2.
- the distance between the grinding sets 1 and 2 is exaggerated. In operation, it is only fractions of a millimeter.
- the suspension S passes through the cooperating Mahlgarnituren 1 and 2, exits at the outlet side again, collects in the annular space 17 and a milled portion S " leaves the annular space 17 via a corresponding nozzle.
- a partial stream S 'of the suspension flows through one on the back 11 of the stator Mahlgarnitur 1 located cavity 14 and then through openings 15, which are located between the grinding edges 3 of the stator Mahlgarnituren 1, to the grinding edges 3 Mahlgamitur 1.
- Mahlkanten are such surfaces to be considered in cooperation with grinding edges of a counter set (in The rotor-side grinding sets 2 are provided with grinding bars 7 which form the grinding edges thereof, and no backflow of the suspension is produced on the rear side of the rotor sets Not shown are the known means by which egg ne force is generated to press the two Mahlgarnituren against each other.
- FIG. 3 shows a grinding set 1 suitable for the method in the direction of the rear side 11 (see FIG. 2).
- the carrier 10 is open at its radially outer side, in which case the support elements are shaped like a spoke and have a closed ring radially inward. In between are the cavities 14.
- the construction is further illustrated by the sectional side view in Fig. 4, where there grinding plate 12th and carrier 10 consist of different components.
- the grinding edges 3 are formed by the edges of the openings 15.
- FIG. 6 shows an example in which the grinding edges 3 'are formed by grinding strips (7) protruding from a grinding plate 12 ' provided with openings 15. This can offer advantages if very many grinding edges 3 'are desired. In addition, protruding Mahlleisten (7) may better protect against wear. It is expedient to then close the grooves lying between the milling strips radially outward.
- the grinding plate 12 "of Fig. 7 does not include the 14th to the discharge side 6 which is open towards the cavities Instead, these cavities incorporated in the stator 8 14.
- the grinding plate 12" thus represents the grinding set 1, which can be screwed to the stator 8.
- measures can be taken to maintain the flow of the partial flow S ' , in particular to avoid disturbing vortexes and stagnation points.
- additional hydraulic guide elements and guide surfaces are to be provided, which, owing to their shape, permit the most continuous and loss-free feeding of the suspension from the discharge side 6 to the grinding edges 3 or 3 ' .
- Fig. 8 and Fig. 9 several possibilities are shown in Fig. 8 and Fig. 9, which can be used individually or in combination with each other.
- the radial outside of the refining plate 12 '" is provided with a rounded projecting deflecting element 18, which, as shown in the detail view in Fig.
- the cavities 14 can be provided with guide elements 19, 20 and 21 , which are directed so that the liquid flowing in the cavities 14 is deflected to the openings 15.
- the transitions of the cavities 14 to the openings 15 may be rounded by means of guide surfaces 22, 23 and 24 so that the flow is deflected without demolition
- the illustration in Fig. 8 shows some examples, whereby the inclination (deviation with respect to the radius) of the openings 15 and their edges can not be discerned It should also be considered that a wear zone 25 and the upper areas of the grinding edges 3 is present, in which possibly the flow-maintaining measures are not meaningful.
- Fig. 10 shows the sector of a known grinding set 2, which can be used in the implementation of the method rotor side. It contains one
- Grinding bars 7 often grouped together in which they are arranged parallel to each other. This allows for a favorable production a large number of grinding bars, which are available at a selectable cutting angle to the radius.
- the shape of the openings 15 lying between the grinding edges can be slot-shaped as shown in FIG. 3, obliquely to the radius or exactly in the radial direction.
- Fig. 11 shows examples of other shapes such as round holes or polygons / quadrilaterals. Variations such as the arrangement and size of the openings 15 provide opportunities to influence the distribution of the backflowing suspension. So z. B. radially further inwardly located openings to compensate for the lower there pressure of the return flow.
- Fig. 12 schematically shows the application in a cone refiner, in which therefore the rotor 9 is frustoconical and carries on its periphery the Mahlgarnitur.
- the cooperating Mahlgarnitur located at the periphery of the rotor and is connected to the frusto-conical stator 8.
- the suspension S is guided in the axial direction between the sets of the feed side 5 to the discharge side 6. The steeper the cone is, the greater the pressure build-up it generates.
- the method may also be designed in such a way that, in addition to, in particular in combination with those described in the claims
- Mahlgarnitur 2 by different groove width and / or different
- Groove depth is changed. So then the groove width and / or groove depth increases from inside to outside or from. As a result, in particular the pressure build-up through the rotor 9 and thus also the backflow in the stator 8 can be influenced, and thus the transfer of the backflowing suspension into the grinding zone can be promoted.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801352857A CN102149870A (zh) | 2008-09-10 | 2009-07-01 | 用于打磨悬浮在水中的纸浆纤维的方法和实施该方法的磨浆套件 |
US13/008,176 US20110253327A1 (en) | 2008-09-10 | 2011-01-18 | Method for refining cellulose fibers in aqueous suspension as well as refiner filling to implement said method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008046592A DE102008046592A1 (de) | 2008-09-10 | 2008-09-10 | Verfahren zur Mahlung von wässrig suspendierten Zellstofffasern sowie Mahlgarnitur zu seiner Durchführung |
DE102008046592.5 | 2008-09-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/008,176 Continuation US20110253327A1 (en) | 2008-09-10 | 2011-01-18 | Method for refining cellulose fibers in aqueous suspension as well as refiner filling to implement said method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010028711A1 true WO2010028711A1 (de) | 2010-03-18 |
Family
ID=41351635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/004739 WO2010028711A1 (de) | 2008-09-10 | 2009-07-01 | Verfahren zur mahlung von wässrig suspendierten zellstofffasern sowie mahlgarnitur zu seiner durchführung |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110253327A1 (de) |
CN (1) | CN102149870A (de) |
DE (1) | DE102008046592A1 (de) |
WO (1) | WO2010028711A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107724152A (zh) * | 2017-10-30 | 2018-02-23 | 四川省犍为凤生纸业有限责任公司 | 一种造纸用自动化磨浆机 |
DE102018133114A1 (de) * | 2018-12-20 | 2020-06-25 | Voith Patent Gmbh | Mahlanordnung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2547830A (en) * | 1947-01-11 | 1951-04-03 | Morden Machines Company | Treating and refining machine for pulp materials |
US2741954A (en) * | 1954-01-20 | 1956-04-17 | Black Clawson Co | Refining paper pulp |
WO1988000992A1 (en) * | 1986-08-07 | 1988-02-11 | Sunds Defibrator Aktiebolag | Apparatus for treatment of fibre suspensions |
DE3700613A1 (de) * | 1986-12-11 | 1988-06-30 | Escher Wyss Gmbh | Refiner zum behandeln einer faserstoffsuspension zur papierherstellung |
DE102004039986A1 (de) * | 2004-08-18 | 2007-12-20 | Voith Patent Gmbh | Verfahren zur Mahlung von Fasern, insbesondere Papierfasern |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202005007551U1 (de) | 2005-05-12 | 2005-07-21 | Voith Paper Patent Gmbh | Schraubverbindung zur Befestigung einer zur Bearbeitung von Faserstoff geeigneten Garnitur sowie Mahlgarnitur |
-
2008
- 2008-09-10 DE DE102008046592A patent/DE102008046592A1/de not_active Withdrawn
-
2009
- 2009-07-01 WO PCT/EP2009/004739 patent/WO2010028711A1/de active Application Filing
- 2009-07-01 CN CN2009801352857A patent/CN102149870A/zh active Pending
-
2011
- 2011-01-18 US US13/008,176 patent/US20110253327A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2547830A (en) * | 1947-01-11 | 1951-04-03 | Morden Machines Company | Treating and refining machine for pulp materials |
US2741954A (en) * | 1954-01-20 | 1956-04-17 | Black Clawson Co | Refining paper pulp |
WO1988000992A1 (en) * | 1986-08-07 | 1988-02-11 | Sunds Defibrator Aktiebolag | Apparatus for treatment of fibre suspensions |
DE3700613A1 (de) * | 1986-12-11 | 1988-06-30 | Escher Wyss Gmbh | Refiner zum behandeln einer faserstoffsuspension zur papierherstellung |
DE102004039986A1 (de) * | 2004-08-18 | 2007-12-20 | Voith Patent Gmbh | Verfahren zur Mahlung von Fasern, insbesondere Papierfasern |
Also Published As
Publication number | Publication date |
---|---|
US20110253327A1 (en) | 2011-10-20 |
CN102149870A (zh) | 2011-08-10 |
DE102008046592A1 (de) | 2010-03-11 |
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