EP0806518A1 - Dispositif pour le pétrissage d'une pulpe à consistance élevée - Google Patents

Dispositif pour le pétrissage d'une pulpe à consistance élevée Download PDF

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Publication number
EP0806518A1
EP0806518A1 EP97104827A EP97104827A EP0806518A1 EP 0806518 A1 EP0806518 A1 EP 0806518A1 EP 97104827 A EP97104827 A EP 97104827A EP 97104827 A EP97104827 A EP 97104827A EP 0806518 A1 EP0806518 A1 EP 0806518A1
Authority
EP
European Patent Office
Prior art keywords
teeth
kneading
kneading device
angle
fibrous material
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
EP97104827A
Other languages
German (de)
English (en)
Other versions
EP0806518B1 (fr
Inventor
Ulrich Wieland
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 Paper Fiber and Environmental Solutions GmbH and Co KG
Original Assignee
Voith Sulzer Stoffaufbereitung 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 Sulzer Stoffaufbereitung GmbH filed Critical Voith Sulzer Stoffaufbereitung GmbH
Publication of EP0806518A1 publication Critical patent/EP0806518A1/fr
Application granted granted Critical
Publication of EP0806518B1 publication Critical patent/EP0806518B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21B1/342—Mixing apparatus

Definitions

  • the invention relates to a device for kneading highly consistent fibrous material according to the preamble of claim 1.
  • a kneading device is e.g. B. known from DE-42 37 433 A1.
  • This device which is suitable for kneading waste paper, serves to process the material intensively mechanically and possibly also thermally, as a result of which the impurities contained therein can be detached from the fibers, crushed and / or brought below the visibility limit.
  • the fiber be it pulp or waste paper, can be processed in such a way that it curls. This gives it specific improvements, such as a larger volume.
  • the raw material intended for the kneading process already has a pasty or soft-crumbly shape, so it is no longer comparable to wood chips or coarser materials. Other than z.
  • the pulp in pulp refiners in such machines, the pulp is not processed in a pumpable suspension, but just as a high consistency, preferably with a dry content between 15 and 40%. In this way, considerable shear forces can be transmitted into the fiber material, whereby the stated goals can be achieved without a substantial change in the fiber length.
  • the effect of mechanical treatment is further enhanced by heat, for example by setting a fiber temperature of 90 o Celsius or even higher.
  • the material In the kneader, the material usually remains in the processing rooms for 15 seconds to several minutes and, due to the distance of more than 3 mm between the tools, is mainly processed by fiber-fiber friction. As is known, this protects the fiber and the processing tools become slow worn.
  • the basic structure of the kneader is almost always recognizable as in the example of DE-42 37 433 A1: the rotor is essentially cylindrical and the material is conveyed axially between standing and moving kneading teeth.
  • Such kneaders have long proven themselves, especially for the use of waste paper.
  • the transport of the material through the processing zone is usually secured both by tilting the processing teeth and by a suitable conveyor, which is designed, for example, as a helical screw on the kneader shaft.
  • the funding parameters are practically fixed.
  • the invention is therefore based on the object of providing a device for kneading highly consistent fibrous material which offers the possibility of changing the transport movement in the processing zone without any appreciable additional outlay.
  • the front of the teeth of such a kneading tool moves relatively towards the fiber. Since the bevel on the front causes the material to be transported to be pushed and deflected in the transport direction, the material transport is supported in the kneader. The prerequisite for this is the relative movement between the bevel and the fibrous material, which can either result from the fact that the tooth in question belongs to the moving kneading tool or from the fact that a fixed tooth is flown against by a material moving in the circumferential direction. In the device equipped according to the invention, there is now the possibility, by simply turning a tooth or a group of teeth of one or more kneading tools, to bring the surface of the tooth previously used as the back to the front.
  • the transport effect depends on the angle that the bevel makes with respect to the direction of movement of the tooth or the material on the unmoved tooth, a different transport effect can also be achieved by turning such a tooth, for example by 180 °, at different angles of the bevel.
  • the incline can even be selected so that it slows down the mass transport.
  • a throughput through the machine would still have to be forced by an upstream or downstream transport device.
  • Figure 1a shows in a developed form the view of the part of a movable kneading tool 1, which belongs to a kneader with an axial flow of material.
  • a row of teeth with a number of teeth 2.
  • Cut 2 indicates the teeth 2 'of a fixed kneading tool.
  • the teeth 2, 2 ' are chamfered on both the front and the back.
  • all teeth have an essentially identical shape, but this need not always be the case (see also FIG. 3). Because of their arrangement in the kneading device, the teeth 2 are moved in the circumferential direction (arrow 3) during operation.
  • a plane E is spanned here, shown in section.
  • the direction of transport T of the fibrous material is perpendicular to this plane E. Only the actual material transport through the kneader is considered. Of course, there is generally also a circumferential movement of the fibrous material.
  • the angles that the bevels have in relation to the transport direction T are specified with angle ⁇ 1 on the front and angle ⁇ 2 on the back - in each case in the position before the tooth is turned.
  • Fig. 1 b shows the parts of Fig. 1 a after turning the teeth 2 and 2 'by 180 o .
  • the transport effect on the front of the teeth is less because of the lower inclination.
  • these tooth surfaces can also be curved.
  • the decisive factor is their transport effect.
  • FIG. 2 shows a somewhat different attachment of the teeth 2 belonging to the device according to the invention.
  • the part of a bar 4 intended for an axial machine, which contains several teeth 2, which then belong to different rows of teeth of this kneading tool, can be seen.
  • the teeth can be turned by turning this bar 4.
  • Such a strip can belong to the rotor or stator, on which it is fastened in an essentially axially aligned manner along its length.
  • Figure 3 shows in section an axially constructed kneading device, in which the transport movement of the fibrous material also takes place axially again.
  • the representation is roughly schematic and contains, for example, only a small part of the teeth actually present.
  • the Fibrous material S is pressed into the actual processing zone upon entry by a screw conveyor 5.
  • the teeth 2, 2 'of which are arranged alternately on the rotor 6 or on the stator housing 7.
  • the teeth 2 'belonging to the stator housing 7 are shown cut. Some of them have a varied, strongly rounded shape, others are cubic but without bevels.
  • the tooth base normals N are indicated, the circumferential movement of which spans the plane E (FIGS.
  • the last stator stage in the flow direction is followed here by an adjustable throttle 8 to achieve a counter pressure.
  • the effect of the kneading device can be further improved by this measure. After passing the throttle 8, the kneaded substance S 'emerges from the stator housing 7 again.
  • Fig. 4 shows the part of a kneading tool that belongs to a radial kneader.
  • the material transport with the transport direction T thus takes place radially outwards from the inside.
  • a cylindrical surface F is spanned by the circumferential movement (arrow 3) of the tooth base normal N 'of the teeth 2.
  • the holes 9 are provided for fastening screws.
  • the tooth 2 'belonging to the stator is only indicated. Deviating from the example shown here, the shape of the teeth 2 can be quite different.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Paper (AREA)
EP97104827A 1996-05-10 1997-03-21 Dispositif pour le pétrissage d'une pulpe à consistance élevée Expired - Lifetime EP0806518B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19618886 1996-05-10
DE19618886 1996-05-10

Publications (2)

Publication Number Publication Date
EP0806518A1 true EP0806518A1 (fr) 1997-11-12
EP0806518B1 EP0806518B1 (fr) 2001-06-27

Family

ID=7793965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104827A Expired - Lifetime EP0806518B1 (fr) 1996-05-10 1997-03-21 Dispositif pour le pétrissage d'une pulpe à consistance élevée

Country Status (5)

Country Link
US (1) US5836689A (fr)
EP (1) EP0806518B1 (fr)
AT (1) ATE202603T1 (fr)
DE (1) DE59703888D1 (fr)
NO (1) NO310307B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1101858A3 (fr) * 1999-11-15 2002-10-09 Voith Paper Patent GmbH Broyeur pour installation de pulpage
EP1247454A4 (fr) * 2000-11-13 2007-01-10 Morinaga & Co Dispositif de malaxage et dispositif de formage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10024122A1 (de) * 2000-05-18 2001-11-22 Lipp Mischtechnik Gmbh Vorrichtung zur Herstellung von Kaugummi
US6767123B2 (en) * 2001-08-15 2004-07-27 Morinaga & Co., Ltd. Kneading device
CN101725065B (zh) * 2009-12-01 2011-09-07 沈阳市宏芮化学品厂 一种反刍式高浓碎浆机
SE536456C2 (sv) * 2011-12-15 2013-11-12 Metso Paper Sweden Ab Blandningsenhet innefattande åtminstone två rotorkroppar föranvändning i en blandningsanordning och en blandningsanordning
DE102021119250B3 (de) * 2021-07-26 2022-07-28 Voith Patent Gmbh Vorrichtung zum Auflösen von Faserstoff

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4237433A1 (fr) * 1992-11-06 1993-05-06 J.M. Voith Gmbh, 7920 Heidenheim, De

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE446025C (de) * 1926-08-21 1927-06-22 Eduard Sterzl Verfahren und Vorrichtung zur Zerkleinerung, Vermahlung, Auffaserung, Mischung oder Verfilzung von feuchten oder trockenen Stoffen
US1711154A (en) * 1926-12-30 1929-04-30 Turbinator Company Inc Mixing and grinding device
US1977955A (en) * 1930-04-02 1934-10-23 Lancaster Asphalt Inc Mixing and reducing apparatus
US2283008A (en) * 1940-08-01 1942-05-12 Pennsylvania Salt Mfg Co Chemical processing apparatus
US2520424A (en) * 1947-05-02 1950-08-29 Procter & Gamble Continuous hydrogenator
CH278575A (de) * 1949-11-04 1951-10-31 List Heinz Misch- und Knetmaschine.
BE561975A (fr) * 1956-11-14
BE607376A (fr) * 1960-08-22 1900-01-01
US3938783A (en) * 1970-10-30 1976-02-17 The Upjohn Company Method for continuous mixing of foam materials
GB1390190A (en) * 1971-07-01 1975-04-09 Wisz E Mixing apparatus and method
JPS59167240A (ja) * 1983-03-14 1984-09-20 Chisso Corp 有機フイラ−を配合された熱可塑性樹脂組成物の成形物の製法及びそのための装置
DE3772991D1 (de) * 1987-08-21 1991-10-17 Schumacher Walter Vorrichtung zum extrudieren, expandieren und/oder thermischen behandeln von stoffen und stoffgemischen.
US5032073A (en) * 1989-10-06 1991-07-16 Thermax Wire Corp. Thin walled high velocity propagation of foamed thermoplastic resins
DE4118091A1 (de) * 1991-06-03 1992-12-10 Theysohn Friedrich Fa Vorrichtung zum plastifizieren von kunststoff
US5450368A (en) * 1993-12-28 1995-09-12 Three Bond Co., Ltd. Two liquid type mixer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4237433A1 (fr) * 1992-11-06 1993-05-06 J.M. Voith Gmbh, 7920 Heidenheim, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1101858A3 (fr) * 1999-11-15 2002-10-09 Voith Paper Patent GmbH Broyeur pour installation de pulpage
EP1247454A4 (fr) * 2000-11-13 2007-01-10 Morinaga & Co Dispositif de malaxage et dispositif de formage

Also Published As

Publication number Publication date
DE59703888D1 (de) 2001-08-02
NO310307B1 (no) 2001-06-18
EP0806518B1 (fr) 2001-06-27
NO971738D0 (no) 1997-04-16
NO971738L (no) 1997-11-11
ATE202603T1 (de) 2001-07-15
US5836689A (en) 1998-11-17

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