EP0275849B1 - Means for dispersing paper, cardboard and pulp - Google Patents

Means for dispersing paper, cardboard and pulp Download PDF

Info

Publication number
EP0275849B1
EP0275849B1 EP87850356A EP87850356A EP0275849B1 EP 0275849 B1 EP0275849 B1 EP 0275849B1 EP 87850356 A EP87850356 A EP 87850356A EP 87850356 A EP87850356 A EP 87850356A EP 0275849 B1 EP0275849 B1 EP 0275849B1
Authority
EP
European Patent Office
Prior art keywords
rotors
basin
pulp
dispersing
wall
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 - Lifetime
Application number
EP87850356A
Other languages
German (de)
French (fr)
Other versions
EP0275849A1 (en
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
Priority to AT87850356T priority Critical patent/ATE74388T1/en
Publication of EP0275849A1 publication Critical patent/EP0275849A1/en
Application granted granted Critical
Publication of EP0275849B1 publication Critical patent/EP0275849B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

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 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 after being dispersed, and one or several dispersing units, placed on the wall of the basin, preferably a rotating rotor/rotors and wherein one or several devices generating pulp flow in the rotors are mounted on the wall of the basin opposite to the rotors.
  • 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.
  • US-A-2 796 006 describes a vertical pulper for dispersion and disintegration of paper and paperboard materials, comprising a tank for material to be treated and having mounted on the cover of the tank a helical vane, intended to force the material against a rotor mounted on the bottom of the tank.
  • the vane is a long massive screw extending from the tank cover to near the rotor at the bottom of the tank, which is required for the thick pulp treated in vertical pulpers.
  • the big massive screw occupies quite a lot of space in the tank and its rotation at relatively high speed creates big mass forces and requires much energy.
  • the object of the present invention is to improve the circulation of pulp, so that the entrance of pulp into the effective range of the rotors is enhanced.
  • the aim is achieved with the means of the invention which is characterized in that the means providing pulp flow is a pump producing liquid flow through a pipe mounted in said wall of the basin.
  • An advantagoeus embodiment of the invention is characterized in that the pipes provided on the wall of the basin opposite to the rotors are located on an imagined continuation of the rotor shafts.
  • 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.
  • 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, in which the pulp flow is provided by a flow-technological means.
  • liquid is pumped into the basin 1 through pipes 9 disposed in the wall 5. In this way is provided again the pulp flow indicated by the arrows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Cartons (AREA)
  • Fats And Perfumes (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (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 mechanical or flow-technological apparatus (7) providing pulp flow for the rotors is mounted on the wall (5) of the basin (1) opposite to the rotors (3).

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 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 after being dispersed, and one or several dispersing units, placed on the wall of the basin, preferably a rotating rotor/rotors and wherein one or several devices generating pulp flow in the rotors are mounted on the wall of the basin opposite to the rotors.
  • 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 pulp 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.
  • US-A-2 796 006 describes a vertical pulper for dispersion and disintegration of paper and paperboard materials, comprising a tank for material to be treated and having mounted on the cover of the tank a helical vane, intended to force the material against a rotor mounted on the bottom of the tank. The vane is a long massive screw extending from the tank cover to near the rotor at the bottom of the tank, which is required for the thick pulp treated in vertical pulpers.
    The big massive screw occupies quite a lot of space in the tank and its rotation at relatively high speed creates big mass forces and requires much energy.
  • The object of the present invention is to improve the circulation of pulp, so that the entrance of pulp into the effective range of the rotors is enhanced. The aim is achieved with the means of the invention which is characterized in that the means providing pulp flow is a pump producing liquid flow through a pipe mounted in said wall of the basin.
  • An advantagoeus embodiment of the invention is characterized in that the pipes provided on the wall of the basin opposite to the rotors are located on an imagined continuation of the rotor shafts.
  • 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 in detail by referring to the drawings attached, in which -
    • Fig. 1 presents in elevational view, and partly sectioned, a means for dispersing paper, cardboard and pulp.
    • Fig. 2 presents the means of prior art in top view and simplified.
    • Fig. 3 presents an 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 1. 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 of 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, in which the pulp flow is provided by a flow-technological means. Therein, liquid is pumped into the basin 1 through pipes 9 disposed in the wall 5. In this way is provided again the pulp flow indicated by the arrows.
  • It is obvious to a person skilled in the art that the invention is not confined to the embodiment presented above, and that it may vary within the scope of the claims stated below.

Claims (2)

  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 (1), preferably a rotating rotor/rotors, and wherein one or several devices generating pulp flow in the rotors are mounted on the wall (5) of the basin opposite to the rotors,
    characterized in
    that the means providing pulp flow is a pump producing liquid flow through a pipe (9) mounted in the said wall of the basin.
  2. Means according to claim 1,
    characterized in
    that the pipe (9) provided on the wall (5) of the basin (1) opposite to the rotors (3) are located on an imagined continuation of the rotor shafts.
EP87850356A 1986-12-19 1987-11-19 Means for dispersing paper, cardboard and pulp Expired - Lifetime EP0275849B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87850356T ATE74388T1 (en) 1986-12-19 1987-11-19 DEVICE FOR THE DISPERSION OF PAPER, BOARD AND PULP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI865207A FI77903C (en) 1986-12-19 1986-12-19 ANORDNING FOER DESTRUKTION AV PAPPER, KARTONG OCH MASSA.
FI865207 1986-12-19

Publications (2)

Publication Number Publication Date
EP0275849A1 EP0275849A1 (en) 1988-07-27
EP0275849B1 true EP0275849B1 (en) 1992-04-01

Family

ID=8523679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87850356A Expired - Lifetime EP0275849B1 (en) 1986-12-19 1987-11-19 Means for dispersing paper, cardboard and pulp

Country Status (5)

Country Link
EP (1) EP0275849B1 (en)
AT (1) ATE74388T1 (en)
DE (1) DE3778001D1 (en)
FI (1) FI77903C (en)
NO (1) NO163539C (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH284805A (en) * 1949-10-31 1952-08-15 Gmbh J M Voith Pulper.
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
CS212562B1 (en) * 1979-09-11 1982-03-26 Jiri Kratky Reserve and homogenization container for the caoline suspensions
FR2544756B1 (en) * 1983-04-22 1985-08-30 Lamort E & M IMPROVEMENTS ON DEFIBRATION TURBINES

Also Published As

Publication number Publication date
FI865207A (en) 1988-06-20
NO875309L (en) 1988-06-20
NO875309D0 (en) 1987-12-18
FI77903B (en) 1989-01-31
NO163539B (en) 1990-03-05
EP0275849A1 (en) 1988-07-27
DE3778001D1 (en) 1992-05-07
FI865207A0 (en) 1986-12-19
NO163539C (en) 1990-06-13
ATE74388T1 (en) 1992-04-15
FI77903C (en) 1989-05-10

Similar Documents

Publication Publication Date Title
US3342425A (en) Paper machinery
US3339851A (en) Paper machinery
FI67580C (en) FOERFARANDE OCH ANORDNING FOER FIBRERING SILNING OCH PUMPNING AV CELLULOSAMASSA OCH RETURPAPPER
FI72356B (en) ANORDNING FOER DESTRUKTION AV PAPPER OCH KARTONG
EP0275849B1 (en) Means for dispersing paper, cardboard and pulp
US5918822A (en) Channeled pulp rotor
EP0323749B1 (en) Method and means for facilitating the discharge of a drop leg or the like and treating pulp in said space
CN210085912U (en) Pulper for producing high-bulk grey board paper
US3387795A (en) Apparatus for the processing of fibrous and other materials including paper stocks
US2694344A (en) Paper machinery
EP0275848A1 (en) Means for dispersing paper, cardboard and pulp
CN109338779A (en) A kind of circulation water conservancy diversion papermaking pulping device
US2696766A (en) Paper machinery
US3420454A (en) Apparatus for defibering cellulosic material in water
CN210287935U (en) Pulping device for paper product production
US6451165B1 (en) Channel pulper
FI78934C (en) ANORDNING FOER DESTRUKTION AV PAPPER, KARTONG ELLER DYLIKA.
US3417933A (en) Pulper
US3295769A (en) Apparatus for beating and disintegrating fibrous materials in liquid suspension
US2617334A (en) Pulper for paper stock
US20080054108A1 (en) Method and apparatus for pulping unit
US2703533A (en) Apparatus for treating paper stock
US3534912A (en) Low speed refining of a papermaking pulp solution
US3387794A (en) Method of the automatic processing of paper stocks
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

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB SE

REF Corresponds to:

Ref document number: 74388

Country of ref document: AT

Date of ref document: 19920415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3778001

Country of ref document: DE

Date of ref document: 19920507

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19921015

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19921021

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19921027

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19921116

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930130

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19931119

Ref country code: AT

Effective date: 19931119

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19931120

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19931119

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940729

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940802

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 87850356.4

Effective date: 19940610