WO1995009268A1 - Method and apparatus for dewatering of a fibre suspension - Google Patents
Method and apparatus for dewatering of a fibre suspension Download PDFInfo
- Publication number
- WO1995009268A1 WO1995009268A1 PCT/SE1994/000899 SE9400899W WO9509268A1 WO 1995009268 A1 WO1995009268 A1 WO 1995009268A1 SE 9400899 W SE9400899 W SE 9400899W WO 9509268 A1 WO9509268 A1 WO 9509268A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fractionator
- dewatering apparatus
- outlet
- dewatering
- accept
- 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
- D21D1/40—Washing the fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
Definitions
- the present invention concers a method and an apparatus for the conversion of a fibre suspension and particularly for increasing the output of a dewatering apparatus especially for recycled fibre pulp.
- an alternative method is proposed, wherein the reject from a dewatering apparatus is treated in a fractionator, where fractioning takes place in liquid, and wherein the fractions from the fractionator are selectively introduced into the accept- flow from the dewatering apparatus.
- this can be accomplished in that a fractionator, wherein fractioning takes place in liquid, is connected to a reject outlet of a dewatering apparatus, and that fraction outlets of the fractionator lead to an accept outlet of the dewatering apparatus.
- 1 designates any dewatering apparatus, herein shown as a so-called thin film washer of the kind described in Swedish Patent Application No. 9303192-0, filed September 30, 1994 and entitled "Apparatus for washing of fibre suspension” .
- Diluted recycled fibre pulp (about 1%) is introduced therein through an inlet 2.
- Water is pressed out of the pulp through a perforated drum 3, and the dewatered pulp (about 8%) is removed from the drum by means of a roller 4 and a scraper 5 and is discharged through an outlet conduit 6.
- the pressed out water which contains long fibres, fines as well as fillers, is discharged from a container 7 through an outlet 8.
- a fractionator 10 fractioning in liquid i.e., an apparatus utilizing the fluid flow phenomenon resulting in that larger particles in a flowing liquid are displaced forwardly in the direction of flow, whereas smaller particles are displaced relatively seen backwards in the direction of flow.
- a flowing plug of, for instance, a suspension there is formed in a flowing plug of, for instance, a suspension, a fractioning in a diminishing particle size from the front and backwards in the plug.
- the fractionator shown is of the kind described in Swedish Patent Application No. 9303193-8, filed September 30, 1994 and entitled "Fractionator".
- Such a fractionator is provided with a rotatable cylindrical drum 11, within which are provided a plurality of cylinders 12, 13, 14, 15 and 16 concentric to the drum.
- Every second such cylinder is tightly connected in its one end to one end wall of the drum, while flow can take place between the other end of the cylinder and the opposite end wall of the drum.
- the outlets 18, 19 and 20 are connected to outlet conduits 21, 22, 23, respectively, which in turn and in a non-shown manner are connected to the outlet conduit 6 of the dewatering apparatus.
- the outlet conduits lead to non-shown tanks for the different fractions, wherefrom the fractions may be selectively introduced into the outlet conduit 6 of the dewatering apparatus in order to re-introduce into the concentrated pulp flow present in the outlet conduit 6 selected amounts of selected fractions from the fractionator.
- the fraction or fractions to be introduced into the outlet conduit 6, as well as the amounts thereof, are determined by sensing the quality of the pulp at the inlet 2 of the dewatering apparatus and/or its outlet 6.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Treatment Of Fiber Materials (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7510256A JPH09505641A (en) | 1993-09-30 | 1994-09-29 | Method and apparatus for dehydrating fiber suspension |
EP94929079A EP0721526B1 (en) | 1993-09-30 | 1994-09-29 | Method and apparatus for dewatering of a fibre suspension |
AU78264/94A AU7826494A (en) | 1993-09-30 | 1994-09-29 | Method and apparatus for dewatering of a fibre suspension |
DE69415035T DE69415035T2 (en) | 1993-09-30 | 1994-09-29 | METHOD AND DEVICE FOR DRAINING A FIBER FIBER SUSPENSION |
NO19961129A NO316278B1 (en) | 1993-09-30 | 1996-03-20 | Method and apparatus for increasing the yield of a dewatering device for a fiber suspension |
FI961452A FI111276B (en) | 1993-09-30 | 1996-03-29 | Method and apparatus for removing water from a fiber suspension |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9303194-6 | 1993-09-30 | ||
SE9303194A SE501772C2 (en) | 1993-09-30 | 1993-09-30 | Method and apparatus for increasing the yield upon dewatering of a fiber suspension |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995009268A1 true WO1995009268A1 (en) | 1995-04-06 |
Family
ID=20391269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1994/000899 WO1995009268A1 (en) | 1993-09-30 | 1994-09-29 | Method and apparatus for dewatering of a fibre suspension |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0721526B1 (en) |
JP (1) | JPH09505641A (en) |
AT (1) | ATE173952T1 (en) |
AU (1) | AU7826494A (en) |
CA (1) | CA2172285A1 (en) |
DE (1) | DE69415035T2 (en) |
ES (1) | ES2124430T3 (en) |
FI (1) | FI111276B (en) |
NO (1) | NO316278B1 (en) |
SE (1) | SE501772C2 (en) |
WO (1) | WO1995009268A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997032079A1 (en) * | 1996-02-28 | 1997-09-04 | Alfa Laval Ab | Improved recovery of fine fibers from suspensions containing fibers and contaminants |
EP0826819A2 (en) * | 1996-08-30 | 1998-03-04 | Voith Sulzer Stoffaufbereitung GmbH | Apparatus for dewatering a fibre suspension |
WO2000066832A1 (en) * | 1999-05-03 | 2000-11-09 | Metso Paper Inc. | Method and apparatus for recovering fibres from white water of paper mill |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2666598A1 (en) * | 1990-09-10 | 1992-03-13 | Escher Wyss Gmbh | Process for the separation, especially for sorting or fractionating a suspension of paper pulp |
-
1993
- 1993-09-30 SE SE9303194A patent/SE501772C2/en not_active IP Right Cessation
-
1994
- 1994-09-29 AT AT94929079T patent/ATE173952T1/en not_active IP Right Cessation
- 1994-09-29 EP EP94929079A patent/EP0721526B1/en not_active Expired - Lifetime
- 1994-09-29 CA CA002172285A patent/CA2172285A1/en not_active Abandoned
- 1994-09-29 JP JP7510256A patent/JPH09505641A/en active Pending
- 1994-09-29 ES ES94929079T patent/ES2124430T3/en not_active Expired - Lifetime
- 1994-09-29 AU AU78264/94A patent/AU7826494A/en not_active Abandoned
- 1994-09-29 DE DE69415035T patent/DE69415035T2/en not_active Expired - Fee Related
- 1994-09-29 WO PCT/SE1994/000899 patent/WO1995009268A1/en active IP Right Grant
-
1996
- 1996-03-20 NO NO19961129A patent/NO316278B1/en unknown
- 1996-03-29 FI FI961452A patent/FI111276B/en active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2666598A1 (en) * | 1990-09-10 | 1992-03-13 | Escher Wyss Gmbh | Process for the separation, especially for sorting or fractionating a suspension of paper pulp |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997032079A1 (en) * | 1996-02-28 | 1997-09-04 | Alfa Laval Ab | Improved recovery of fine fibers from suspensions containing fibers and contaminants |
EP0826819A2 (en) * | 1996-08-30 | 1998-03-04 | Voith Sulzer Stoffaufbereitung GmbH | Apparatus for dewatering a fibre suspension |
EP0826819A3 (en) * | 1996-08-30 | 1999-02-24 | Voith Sulzer Stoffaufbereitung GmbH | Apparatus for dewatering a fibre suspension |
WO2000066832A1 (en) * | 1999-05-03 | 2000-11-09 | Metso Paper Inc. | Method and apparatus for recovering fibres from white water of paper mill |
US6551458B2 (en) | 1999-05-03 | 2003-04-22 | Metso Paper, Inc. | Method and apparatus for recovering fibers from white water of paper mill |
Also Published As
Publication number | Publication date |
---|---|
FI961452A0 (en) | 1996-03-29 |
FI111276B (en) | 2003-06-30 |
EP0721526B1 (en) | 1998-12-02 |
SE9303194L (en) | 1995-03-31 |
DE69415035D1 (en) | 1999-01-14 |
NO316278B1 (en) | 2004-01-05 |
NO961129L (en) | 1996-03-20 |
ES2124430T3 (en) | 1999-02-01 |
NO961129D0 (en) | 1996-03-20 |
DE69415035T2 (en) | 1999-05-06 |
FI961452A (en) | 1996-03-29 |
SE9303194D0 (en) | 1993-09-30 |
EP0721526A1 (en) | 1996-07-17 |
AU7826494A (en) | 1995-04-18 |
SE501772C2 (en) | 1995-05-15 |
JPH09505641A (en) | 1997-06-03 |
ATE173952T1 (en) | 1998-12-15 |
CA2172285A1 (en) | 1995-04-06 |
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