EP0275848A1 - Means for dispersing paper, cardboard and pulp - Google Patents

Means for dispersing paper, cardboard and pulp Download PDF

Info

Publication number
EP0275848A1
EP0275848A1 EP87850355A EP87850355A EP0275848A1 EP 0275848 A1 EP0275848 A1 EP 0275848A1 EP 87850355 A EP87850355 A EP 87850355A EP 87850355 A EP87850355 A EP 87850355A EP 0275848 A1 EP0275848 A1 EP 0275848A1
Authority
EP
European Patent Office
Prior art keywords
pulp
basin
rotor
dispersing
rotors
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.)
Withdrawn
Application number
EP87850355A
Other languages
German (de)
French (fr)
Inventor
Jyrki Paavola
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.)
Sunds Defibrator Jylha OY
Original Assignee
Sunds Defibrator Jylha OY
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 Sunds Defibrator Jylha OY filed Critical Sunds Defibrator Jylha OY
Publication of EP0275848A1 publication Critical patent/EP0275848A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • D21B1/345—Pulpers
    • D21B1/347—Rotor assemblies

Definitions

  • the present invention concerns a means for dispersing paper, cardboard and pulp, said means comprising a basin open on top into which the raw material to be dissolved is fed e.g. from a paper machine located thereabove, and wherefrom it is removed with a pump after being dispersed, and one or several dispersing units, preferably a rotating rotor/rotors, placed on a wall of the basin.
  • This kind of means (a pulper) is primarily used underneath big paper machines for dispersing paper and cardboard.
  • Fluted guide members are provided above the means which guide the paper and cardboard to be dispersed, coming from the paper machine to a basin open on top.
  • dispersing units On one wall of the basin are placed dispersing units, these being rotors.
  • the rotors are usually placed side by side at the same height from the basin bottom, and their shafts are as a rule parallel. Outside the basin, between the rotor shafts, is usually placed a removal pump for the dispersed pulp.
  • the object of the present invention is to improve the circulation of pulp, so that the entrance of pulp in to effective range of the rotors is enhanced.
  • the aim is achieved with the means of the invention which is characterized in that one or several pulp feeding members are provided in the basin the shaft thereof being coupled to the shaft of the rotor and parallel therewith.
  • An advantageous embodiment of the invention is characterized in that the member feeding pulp is a propeller.
  • Another advantageous embodiment of the invention is characterized in that the member feeding pulp is a screw.
  • a further advantageous embodiment of the invention is characterized in that the distance of the member feeding pulp from the rear surface of the rotor on the side towards the motor is less than or equal to 4000 mm.
  • Fig. 1 a means for dispersing paper, cardboard and pulp.
  • the means is most advantageously placed below a large paper machine, whereby the feeding of material to be dispersed into the basin 1 is through the open top part of the basin.
  • oblique guides 2 visible only in Fig. 1.
  • Dispersing paper, cardboard and pulp in the basin 1 takes place by means of dispersing units 3, which most advantageously are rotating rotors. In the embodiment examples presented in the present application, there are two rotors, these being located at the same height and on the same wall 6 of the basin.
  • the drive motors 4 of the rotors 3 are placed outside the basin.
  • Fig. 2 is presented a dispersing means likewise of prior art, and the mutual location of the rotors in relation to each other is shown therein.
  • the pulp circulation inside the basin 1 is not efficient enough.
  • Fig. 3 is presented the means of an embodiment of the invention, considerably simplified, for dispersing paper, cardboard and pulp.
  • the shafts of the dispersing rotors 3 coincide each with a shaft 8 of a member feeding pulp to the rotors, a propeller 7 in thr oresent instance, and parallel with it.
  • the propeller 7 may rotate either at the same speed as the rotor 3 or at a different speed.
  • the distance of the propeller 7 from the rear face of the dispersing rotor 3 on the the motor side is less than or equal to 4000 mm.
  • Arrows in Fig. 3 indicate the flow directions of pulp, and one may learn from them that pulp feeding to the rotors 3 has become more efficient than before.
  • the member feeding pulp is a screw 9 or equivalent, which in other respects is similarly mounted as the propeller 7 described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Cartons (AREA)

Abstract

A means for dispersing paper, cardboard and pulp, comprising a basin (1) open on top, into which the raw material to be dispersed is fed e.g. from a paper machine located thereabove, and wherefrom it is removed when dispersed with the aid of a pump, and one or several dispersing units (3) placed on the wall (6) of the basin (1), preferably a rotor/rotors. A problem with this kind of apparatus known in the art is that the pulp-circulation effect of the dispersing rotors is poor, whereby the material to be dispersed cannot enter the effective range of the rotors well enough. With the aid of the invention, the problem is solved in that one or several members (7) feeding pulp are provided in the basin its/their shaft (8) connecting with the shaft (5) of the rotor (3) and parallelling it.

Description

  • The present invention concerns a means for dispersing paper, cardboard and pulp, said means comprising a basin open on top into which the raw material to be dissolved is fed e.g. from a paper machine located thereabove, and wherefrom it is removed with a pump after being dispersed, and one or several dispersing units, preferably a rotating rotor/rotors, placed on a wall of the basin.
  • This kind of means (a pulper) is primarily used underneath big paper machines for dispersing paper and cardboard. Fluted guide members are provided above the means which guide the paper and cardboard to be dispersed, coming from the paper machine to a basin open on top. On one wall of the basin are placed dispersing units, these being rotors. Most often there are two rotors, each being provided with a drive motor of its own. The rotors are usually placed side by side at the same height from the basin bottom, and their shafts are as a rule parallel. Outside the basin, between the rotor shafts, is usually placed a removal pump for the dispersed pulp.
  • The greatest drawback embarrassing the apparatus known in the art is that the pump circulating effect of the rotors is poor, whereby the paper or cardboard to be dispersed does not efficiently enter the effective region of the rotors. At the same time, sizing and various fillers have developed, and the production quantities and requirements of machines have increased.
  • The object of the present invention is to improve the circulation of pulp, so that the entrance of pulp in to effective range of the rotors is enhanced. The aim is achieved with the means of the invention which is characterized in that one or several pulp feeding members are provided in the basin the shaft thereof being coupled to the shaft of the rotor and parallel therewith.
  • An advantageous embodiment of the invention is characterized in that the member feeding pulp is a propeller.
  • Another advantageous embodiment of the invention is characterized in that the member feeding pulp is a screw.
  • A further advantageous embodiment of the invention is characterized in that the distance of the member feeding pulp from the rear surface of the rotor on the side towards the motor is less than or equal to 4000 mm.
  • As one of the most remarkable advantages of the invention may be mentioned saving of energy which is based on the fact that the dispersing rotors are started only in the event of web break and that the rotor receives a filling in axial direction which corresponds to the radial output of the dispersing rotor, whereby the paper entering the means will pass efficiently with the liquid flow to the dispersing rotor.
  • In the following is presented the invention is detail by referring to the drawings attached, in which -
    • Fig. 1 presents in elevational view, and partly sectioned, a means of prior art for dispersing paper, cardboard and pulp.
    • Fig. 2 presents the means of prior art in top view and simplified.
    • Fig. 3 presents the means of an embodiment of the invention in top view and simplified.
    • Fig. 4 presents the means of another embodiment of the invention in top view and simplified.
  • In Fig. 1 is presented a means for dispersing paper, cardboard and pulp. The means is most advantageously placed below a large paper machine, whereby the feeding of material to be dispersed into the basin 1 is through the open top part of the basin. For said purpose, above the basin are provided oblique guides 2, visible only in Fig. 1. Dispersing paper, cardboard and pulp in the basin 1 takes place by means of dispersing units 3, which most advantageously are rotating rotors. In the embodiment examples presented in the present application, there are two rotors, these being located at the same height and on the same wall 6 of the basin. The drive motors 4 of the rotors 3 are placed outside the basin.
  • In Fig. 2 is presented a dispersing means likewise of prior art, and the mutual location of the rotors in relation to each other is shown therein. In apparatus or prior art, the pulp circulation inside the basin 1 is not efficient enough.
  • In Fig. 3 is presented the means of an embodiment of the invention, considerably simplified, for dispersing paper, cardboard and pulp. Therein, the shafts of the dispersing rotors 3 coincide each with a shaft 8 of a member feeding pulp to the rotors, a propeller 7 in thr oresent instance, and parallel with it. The propeller 7 may rotate either at the same speed as the rotor 3 or at a different speed. The distance of the propeller 7 from the rear face of the dispersing rotor 3 on the the motor side is less than or equal to 4000 mm. Arrows in Fig. 3 indicate the flow directions of pulp, and one may learn from them that pulp feeding to the rotors 3 has become more efficient than before. In Fig. 4, the member feeding pulp is a screw 9 or equivalent, which in other respects is similarly mounted as the propeller 7 described above.
  • It is obvious to a person skilled in the art that the invention is not confined the embodiment examples presented above, and that they may vary within the scope of the claims stated below.

Claims (6)

1. A means for dispersing paper, cardboard and pulp, comprising a basin (1) open on top, into which the raw material to be dispersed is fed e.g. from a paper machine located thereabove and wherefrom it is removed in dispersed state with the aid of a pump, and one or several dispersing units (3) placed on the wall (6) of the basin, preferably a rotating rotor/rotors, characterized in that in the basin is provided one or several pulp-feeding members (7,9), its shaft (8) being parallel with the shaft (5) of the rotor (3).
2. Means according to claim 1, characterized in that the member feeding pulp is a propeller (7).
3. Means according to claim 1, characterized in that the member feeding pulp is a screw (9).
4. Means according to any one of claims 1 to 3, characterized in that the distance of the means (7,9) feeding pulp is less than or equal to 4000 mm from the rear face of the rotor (3) on the side of the motor (4) is less than or equal to 4000 mm.
5. Means according to any one of claims 1 to 4, characterized in that the speeds of rotation of the member (7,9) feeding pulp and of the rotor (3) are equal.
6. Means according to any one of claims 1 to 4, characterized in that the speeds of rotation of the member (7,9) feeding pulp and of the rotor (3) are different.
EP87850355A 1986-12-19 1987-11-19 Means for dispersing paper, cardboard and pulp Withdrawn EP0275848A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI865208 1986-12-19
FI865208A FI77904C (en) 1986-12-19 1986-12-19 Device for destruction of paper, cardboard and pulp.

Publications (1)

Publication Number Publication Date
EP0275848A1 true EP0275848A1 (en) 1988-07-27

Family

ID=8523680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87850355A Withdrawn EP0275848A1 (en) 1986-12-19 1987-11-19 Means for dispersing paper, cardboard and pulp

Country Status (3)

Country Link
EP (1) EP0275848A1 (en)
FI (1) FI77904C (en)
NO (1) NO875310L (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191410154A (en) * 1914-04-24 1914-10-01 Samuel Milne Improvements in Pulp Mixing Chests and the like.
FR1032588A (en) * 1949-10-31 1953-07-02 Voith Gmbh J M Dough crusher
DE882182C (en) * 1950-12-10 1953-07-06 Paul Vollrath Maschinenfabrik Device for shooting up waste paper, cellulose, wood pulp and the like. like
US2796006A (en) * 1955-03-24 1957-06-18 Merle P Chaplin Fibre disintegrator and separator
US3417933A (en) * 1965-07-12 1968-12-24 Black Clawson Co Pulper
EP0124431A1 (en) * 1983-04-22 1984-11-07 E. + M. Lamort Société Anonyme dite: Pulping rotors

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191410154A (en) * 1914-04-24 1914-10-01 Samuel Milne Improvements in Pulp Mixing Chests and the like.
FR1032588A (en) * 1949-10-31 1953-07-02 Voith Gmbh J M Dough crusher
DE882182C (en) * 1950-12-10 1953-07-06 Paul Vollrath Maschinenfabrik Device for shooting up waste paper, cellulose, wood pulp and the like. like
US2796006A (en) * 1955-03-24 1957-06-18 Merle P Chaplin Fibre disintegrator and separator
US3417933A (en) * 1965-07-12 1968-12-24 Black Clawson Co Pulper
EP0124431A1 (en) * 1983-04-22 1984-11-07 E. + M. Lamort Société Anonyme dite: Pulping rotors

Also Published As

Publication number Publication date
FI865208A (en) 1988-06-20
FI77904B (en) 1989-01-31
FI865208A0 (en) 1986-12-19
NO875310D0 (en) 1987-12-18
NO875310L (en) 1988-06-20
FI77904C (en) 1989-05-10

Similar Documents

Publication Publication Date Title
US3342425A (en) Paper machinery
US3339851A (en) Paper machinery
US4535943A (en) Pulping apparatus including a rotor and helical screw flights extending upwardly from the rotor
GB2113570A (en) Improvements in or relating to pulping apparatus
GB2053731A (en) Pulping apparatus
US3085756A (en) Apparatus and method for pulping
FI72356B (en) ANORDNING FOER DESTRUKTION AV PAPPER OCH KARTONG
US5918822A (en) Channeled pulp rotor
EP0275848A1 (en) Means for dispersing paper, cardboard and pulp
JPS59216993A (en) Apparatus and method for pulping high consistency paper pulpstock material
US3387795A (en) Apparatus for the processing of fibrous and other materials including paper stocks
EP0275849B1 (en) Means for dispersing paper, cardboard and pulp
US2694344A (en) Paper machinery
US3486702A (en) Pulping apparatus
EP0117716B1 (en) Apparatus for pulping paper, and a rotor therefor
US2485368A (en) Pulper
US2696766A (en) Paper machinery
CN109338779A (en) A kind of circulation water conservancy diversion papermaking pulping device
US3417933A (en) Pulper
US2748666A (en) Method for handling high consistency paper pulp
US2055143A (en) Paper making machinery
US3420454A (en) Apparatus for defibering cellulosic material in water
CN210287935U (en) Pulping device for paper product production
FI78934C (en) ANORDNING FOER DESTRUKTION AV PAPPER, KARTONG ELLER DYLIKA.
US5051151A (en) Side extraction pulper with screw type rotor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR GB SE

17P Request for examination filed

Effective date: 19881021

EL Fr: translation of claims filed
17Q First examination report despatched

Effective date: 19900521

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19901002

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PAAVOLA, JYRKI