WO1990002223A1 - A method of treating and a disperger for disintegrating wood pulp, especially containing waste paper - Google Patents
A method of treating and a disperger for disintegrating wood pulp, especially containing waste paper Download PDFInfo
- Publication number
- WO1990002223A1 WO1990002223A1 PCT/SE1989/000453 SE8900453W WO9002223A1 WO 1990002223 A1 WO1990002223 A1 WO 1990002223A1 SE 8900453 W SE8900453 W SE 8900453W WO 9002223 A1 WO9002223 A1 WO 9002223A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pulp
- screw
- disperser
- steam
- plug
- 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
- D21D1/004—Methods of beating or refining including disperging or deflaking
-
- 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
- D21B1/32—Defibrating by other means of waste paper
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Definitions
- the present invention relates to a method of treating wood-fibre pulp, particularly pulp which contains waste or recycled paper of the kind stated in the preamble of Claim 1.
- the invention relates to a disperger or disperser for finely-dividing wood-fibre pulp and particularly of the kind stated in the pre- amble of Claim 6.
- the pulp is processed in a plurality of treatment stages, including dewatering of the pulp in a dewatering zone by means of a screw-press, so as to
- the pulp is passed from the dewatering zone to a heating zone, in which the pulp is advanced while steam is supplied to the zone.
- the pulp is processed in this zone by jneans of a so-called pulp shredder, which converts the pulp into granules or small particles or some like form, so as to enable the pulp to be heated quickly and uniformly to the temperature desired with the aid of saturated steam.
- the average steam consumption is about 300 kg/tonne pulp.
- the heated and finely-divided pulp is then passed to a disperser, which enables the pulp material to be worked gently at high consistencies. This is made possible by the mutually opposing toothed disks of the disperser, of which one disk rotates relative to the other.
- the dispersion-gap is adjusted during operation, suitably by means of an electro-hydraulic system.
- the temperature of the pulp processed may be varied between, for instance, 80° and 120"C, depending on the nature of the pulp being processed.
- the fibres present in the pulp are liable to be destroyed or damaged when excessively high temperatures are used.
- the pulp exiting from the heating zone may have a con ⁇ sistency of up to 30%. This consistency is reduced to some extent by the pressurized steam delivered to said zone.
- Diluting or thinning water is normally added during the dispersion process, and the consistency of the pulp pumped from the disperser will consequently lie between 3.5 and 6%.
- the pulp consistency may be as high as about 10% in some cases.
- a prime object of the present invention is to provide an improved method for the treatment of wood-fibre pulp which will enable the heat-content of the steam supplied to the heating zone to be utilized in a more efficient manner, thereby to enable highly-contaminated recycled paper to be treated more effectively, and to increase the pulp consistency of the treated final product.
- a further object is to provide a treatment method which can be adapted to prevailing parameters of the treated product with the aid of simple means, and which will provide a good result when the temperature prevailing during the treatment process varies between values which lie beneath and substantially above 100'c, and which will produce a final product at pulp consistencies which have hitherto been considered unattainable.
- a further object of the present invention is to provide apparatus for treating wood-fibre pulp, particularly wood-fibre pulp that contains recycled paper, which will enable the heat-content of the steam supplied to be utilized more efficiently without incurring structural complications of an essential nature, and which will permit simple adjustments and controls to be cade in dependence on the extent to which the pulp is contami ⁇ nated and on other qualities of the pulp, and which can be readily regulated in dependence on the desired pro ⁇ perties of the final product, and particularly with respect to the consistency .of the ingoing pulp.
- one aspect of this invention consists in a method of the aforesaid kind which is characterised by the steps of passing the finely-divided pulp from the disperser to a screw press of which one end is closed, without separate departure of the steam, such as to form a prevailing, sealing plug of compacted pulp.
- the plug formed in the screw press creates an effective seal against the departure of steam from the system, therewith enabling the pulp-consistency of the treated final product to be increased.
- the inventive method enables pulp consistencies of 30% or higher to be achieved.
- the invention relates to a disperser intended for finely-dividing dewatered and heated wood-fibre pulp, and being of the afore-described kind which is characterised in that the outlet for finely-divided pulp discharges into a screw-press, by means of which the pulp is advanced without the separate departure of steam; and in that one end of the screw press is closed by means of a valve device such that the advancing pulp will be compacted and form a plug seal at said one end.
- Figure 1 illustrates the principle construction of some of the components of a processing plant for carrying out the method according to the invention.
- Figure 2 is a side view, partly cut-away, of a disperser forming part of the processing plant, and illustrating the manner in which the disperser co-acts with a screw- press or "plug-outfeed screw” in a manner to produce a pulp-plug which seals the system.
- Figure 3 is an end view of the arrangement illustrated in Figure 2.
- Figure 1 illustrates schematically some of the essential components of a plant intended for the treatment of pulp which contains recycled paper.
- the pulp is passed through a conduit 2 to a screw-type dewatering device 3, in which the pulp is dewatered from an input consistency of 2%, to an output consistency of 8%, the water pressed from the pulp being discharged through a conduit 19.
- the dewatering zone also includes a screw press 4 , which increases the pulp consistency from an input value of 6% to an output value of 30%.
- the screw is coated with hardmetal.
- the screw press is designed such that all parts of the dispersing system are readily accessible.
- the pulp is then transferred by a plug screw 5 and a vertical conveyor screw 6 to a pulp shredder 7 located in the heating zone of the treatment plant.
- Steam is introduced to different locations along the axial length of the pulp shredder, through a manifold inlet system 8.
- the pressure and temperature of the steam is varied in dependence on the extent to which the ingoing pulp is contaminated.
- the pulp shredder converts the mass-plug into a particle form, thereby enabling the pulp to be heated uniformly and quickly.
- the finely-divided pulp can, in this way, be heated effectively to the temperature desired, with the aid of saturated steam.
- the steam overpressure is controlled with the aid of appropriate valve devices.
- the heated pulp-granules are transferred from the pulp shredder 7, via a conveyor screw 9, to a disperser 10, which is illustrated in larger scale in Figure 2, with parts of the disperser cut-away.
- the disperser comprises a housing 10a provided with an inlet through which the pulp is delivered axially to a central infeed zone.
- the disperser includes a rotor 11 which is driven by an electric motor and which carries pump-vanes on the end thereof located in the vicinity of the infeed zone.
- the rotor also carries a disk 12 having a peripheral section provided with teeth 12a. These teeth are intended to co- act with teeth on a toothed ring or disk rigidly mounted on the housing, such as to finely-divide the pulp enter- ing the disperser. Dilution water is delivered to the disperser through conduits 13, 14.
- the disperser also comprises an outlet 16 which is connected to the housing by means of a flange 10b.
- the flange-connection 10b of the outlet 16 is connected to a corresponding flange-connection 20b of a screw- press or plug outfeed screw 20.
- a flap-valve 21 which is pivotally mounted on a pivot journal 22 and activated by a pneu- atic piston-cylinder device 23, 24.
- the setting of the piston-cylinder device is adjusted, by means of adjust ⁇ ing means (not shown), so that the flap valve 21 will exert a pre-determined counter-pressure against the pulp plug formed at said one end of the screw 20.
- the flap- valve will thus open when the pressure exerted by the plug exceeds said pre-determined pressure, whereby the plug will be discharged from the screw at the desired pulp consis-tency, e.g. a pulp consistency of 30% or more.
- the pulp-plug will function to seal the system, so that the heat content of the steam delivered to the system at over- pressure and relatively high temperature, e.g. a tem ⁇ perature of 110-120°C, can be utilized in the most effective manner possible.
- the pressure and temperature of the steam delivered to the system are adjusted appropriately when the pulp treated is highly contaminated.
- the counter- pressure exerted by the piston-cylinder device 23 on the flap-valve 21 is also adjusted in dependence on the extent to which the pulp is contaminated.
- the flange connections 10b, 20b located between the disperser and the screw 20 have a rectangular cross-section, wherewith the internal measurement of the disperser outlet and the screw inlet, i.e. the through-flow area of the pulp transferred from the disperser to the screw will correspond approximately to the diameter of the rotor disk 12 multiplied by the total width of the disperser in the region of the mutually co-acting toothed disks.
- a plug-outfeed screw of the aforesaid kind in direct connection with the disperser will enable the consistency of the pulp product to be raised to 30% or more, and will also enable the energy content of the steam supplied to the system to be recovered effectively, since the pulp-plug formed at said one end of the screw 20 will effectively seal the system, such that the heat content of the steam supplied will be utilized in the best possible manner.
- the configuration of the disperser outlet is significant insomuch as it is impossible to pump high-consistency pulp through a narrow conduit or a narrow space with the aid of the disperser.
- the disperser outlet has relatively large dimen ⁇ sions.
- the manner in which the outlet is arranged in other respects or how the disperser and the plug-outfeed screw are arranged in relation to one another is not essential to the invention.
- the only essential feature in this respect is that the two units together form a closed system and that the pulp-plug formed in the screw assist in preventing steam from escaping the system.
- the components located in the treatment system upstream of the disperser can vary in accordance with prevailing requirements.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Crushing And Grinding (AREA)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE68918594T DE68918594T2 (de) | 1988-08-30 | 1989-08-30 | Behandlungsverfahren und dispergiervorrichtung zum disintegrieren von holzpulpe, insbesondere von pulpe, die papierabfall enthält. |
EP19890909881 EP0431040B1 (en) | 1988-08-30 | 1989-08-30 | A method of treating and a disperger for disintegrating wood pulp, especially containing waste paper |
CA 614728 CA1331709C (en) | 1988-08-30 | 1989-09-29 | Method in the treatment of wood-fibre pulp, and a disperser for use in conjunction therewith |
DK028791A DK171513B1 (da) | 1988-08-30 | 1991-02-20 | Fremgangsmåde til behandling og disperger til findeling af træpulp, navnlig indeholdende affaldspapir |
NO910747A NO172503C (no) | 1988-08-30 | 1991-02-26 | Fremgangsmaate ved behandling av disperger for finoppdeling av trefibermasse, saerlig inneholdende returpapir |
FI911032A FI89946C (sv) | 1988-08-30 | 1991-02-28 | Sätt vid behandling och disperger för finfördelning av träfibermassa, särskilt innehållande returpapper |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8803033A SE461919B (sv) | 1988-08-30 | 1988-08-30 | Saett vid behandling av traefibermassa, saerskilt innehaallande returpapper, samt disperger foer genomfoerande av foerfarandet |
SE8803033-3 | 1988-08-30 | ||
CA 614728 CA1331709C (en) | 1988-08-30 | 1989-09-29 | Method in the treatment of wood-fibre pulp, and a disperser for use in conjunction therewith |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1990002223A1 true WO1990002223A1 (en) | 1990-03-08 |
Family
ID=25673167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1989/000453 WO1990002223A1 (en) | 1988-08-30 | 1989-08-30 | A method of treating and a disperger for disintegrating wood pulp, especially containing waste paper |
Country Status (8)
Country | Link |
---|---|
US (1) | US5176793A (sv) |
EP (1) | EP0431040B1 (sv) |
JP (1) | JP2811489B2 (sv) |
AT (1) | ATE112337T1 (sv) |
CA (1) | CA1331709C (sv) |
DE (1) | DE68918594T2 (sv) |
SE (1) | SE461919B (sv) |
WO (1) | WO1990002223A1 (sv) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1147805A1 (de) * | 2000-04-13 | 2001-10-24 | Voith Paper Patent GmbH | Verfahren zur Dispergierung eines Papierfaserstoffes sowie Anlage zur Durchführung des Verfahrens |
WO2016105270A1 (en) * | 2014-12-22 | 2016-06-30 | Valmet Ab | Arrangement and system for feeding biomass material to a treatment process |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5348620A (en) * | 1992-04-17 | 1994-09-20 | Kimberly-Clark Corporation | Method of treating papermaking fibers for making tissue |
US5501768A (en) * | 1992-04-17 | 1996-03-26 | Kimberly-Clark Corporation | Method of treating papermaking fibers for making tissue |
GB9212867D0 (en) * | 1992-06-17 | 1992-07-29 | Wiggins Teape Group Ltd | Recovery and re-use of raw materials from paper mill waste sludge |
US5520780A (en) * | 1993-11-30 | 1996-05-28 | Dxresources Corporation | Method and apparatus for de-inking newsprint using counterflow extractor |
US5679221A (en) * | 1994-08-26 | 1997-10-21 | Westvaco Corporation | Method for aluminum reduction in recycled pulp and paper |
SE503502C2 (sv) * | 1994-10-21 | 1996-06-24 | Regalco Ab | Matningsanordning för fuktigt material under högt gastryck |
US5762756A (en) * | 1994-11-21 | 1998-06-09 | The Black Clawson Company | Methods and apparatus for pulping and deinking |
US5624616A (en) * | 1995-04-20 | 1997-04-29 | Brooks; S. Hunter W. | Method for co-refining dry urban wood chips and blends of dry urban wood chips and thermoplastic resins for the production of high quality fiberboard products |
US5733412A (en) * | 1995-09-13 | 1998-03-31 | International Paper Company | Decolorizing brown fibers in recycled pulp |
SE506803C2 (sv) * | 1996-07-25 | 1998-02-16 | Cellwood Machinery Ab | Sätt och anläggning för blekning av returpappersmassa |
US6306248B1 (en) | 1997-11-20 | 2001-10-23 | The University Of Alabama In Huntsville | Method for transforming diverse pulp and paper products into a homogenous cellulosic feedstock |
DE10021319A1 (de) * | 2000-05-02 | 2001-11-08 | Voith Paper Patent Gmbh | Verfahren zur Herstellung von Bodenhilfsstoffen aus cellulosehaltigem Material |
DE10107448A1 (de) * | 2001-02-16 | 2002-08-22 | Voith Paper Patent Gmbh | Verfahren und Vorrichtung zum Beladen von in einer Faserstoffsuspension enthaltenen Fasern mit einem Füllstoff |
DE10135699A1 (de) * | 2001-07-21 | 2003-02-13 | Voith Paper Patent Gmbh | Verfahren zur Aufbereitung von Trockenausschuss |
FI112805B (sv) * | 2001-10-10 | 2004-01-15 | Megatrex Oy | Förfarande för avlägsnande av färgämnen, särskilt tryckfärg från återvinningsfibermaterial |
JP2003119679A (ja) * | 2001-10-17 | 2003-04-23 | Aikawa Iron Works Co Ltd | パルプ加熱装置 |
US6769199B2 (en) | 2001-10-30 | 2004-08-03 | Weyerhaeuser Company | Process for producing dried singulated cellulose pulp fibers using a jet drier and injected steam and the product resulting therefrom |
US7018508B2 (en) * | 2001-10-30 | 2006-03-28 | Weyerhaeuser Company | Process for producing dried singulated crosslinked cellulose pulp fibers |
US6782637B2 (en) * | 2001-10-30 | 2004-08-31 | Weyerhaeuser Company | System for making dried singulated crosslinked cellulose pulp fibers |
US6862819B2 (en) | 2001-10-30 | 2005-03-08 | Weyerhaeuser Company | System for producing dried singulated cellulose pulp fibers using a jet drier and injected steam |
US6748671B1 (en) * | 2001-10-30 | 2004-06-15 | Weyerhaeuser Company | Process to produce dried singulated cellulose pulp fibers |
US7334347B2 (en) * | 2001-10-30 | 2008-02-26 | Weyerhaeuser Company | Process for producing dried, singulated fibers using steam and heated air |
AT411604B (de) * | 2002-03-27 | 2004-03-25 | Andritz Ag Maschf | Verfahren und vorrichtung zur dispergierung eines papierfaserstoffes |
US7188792B2 (en) * | 2003-03-18 | 2007-03-13 | Gl&V Management Hungary Kft. | Refiner rotor assembly with a hub having flow-through ports |
US7396435B2 (en) * | 2003-09-29 | 2008-07-08 | Weyerhaeuser Co. | Method for conveying, mixing, and leveling dewatered pulp prior to drying |
US7291244B2 (en) * | 2003-09-29 | 2007-11-06 | Weyerhaeuser Company | Pulp flaker |
DE102005012168A1 (de) * | 2005-03-17 | 2006-09-28 | Voith Paper Patent Gmbh | Verfahren und Vorrichtung zum Beladen von in einer Faserstoffsuspension enthaltenen Fasern mit Füllstoff |
US7497392B2 (en) * | 2006-07-17 | 2009-03-03 | Alliance Technology Group, Inc. | Process and apparatus for transforming waste materials into fuel |
EP2398958B1 (en) * | 2009-01-13 | 2013-02-13 | Biogasol ApS | System and method for producing bio-products |
SE0900298A1 (sv) * | 2009-03-09 | 2010-05-11 | Lars Obitz | Anordning för matning av cellulosamaterial genom bildande av en trycktät materialplugg |
EP3055406A2 (en) | 2013-10-13 | 2016-08-17 | Cornerstone Resources, LLC | Methods and apparatus utilizing vacuum for breaking organic cell walls |
EP3754106B1 (en) * | 2019-06-20 | 2021-11-24 | Cellwood Machinery AB | Apparatus and method for dispersing or refining of organic material, such as cellulose fiber and organic waste |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI66927B (fi) * | 1980-02-27 | 1984-08-31 | Sunds Defibrator | Saett och anordning foer avskiljning av aonga |
SE435532B (sv) * | 1983-02-22 | 1984-10-01 | Sunds Defibrator | Sett och anordning for framstellning av fibermassa fran lignocellulosahaltigt material |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3057769A (en) * | 1955-05-16 | 1962-10-09 | Waldorf Paper Prod Co | Method of preparing paper of uniform appearance |
US3467574A (en) * | 1966-06-14 | 1969-09-16 | Crown Zellerbach Corp | Refiner bleaching of high yield pulps |
DE2818779A1 (de) * | 1978-03-07 | 1979-09-13 | Escher Wyss Gmbh | Verfahren zur behandlung von altpapier zur gewinnung von stofffluessigkeit fuer die herstellung von neuem papier sowie vorrichtung zur ausfuehrung des verfahrens |
SE427123C (sv) * | 1979-01-04 | 1984-10-22 | Bahco Ventilation Ab | Sett och anordning vid defibrering av flis eller liknande vegetabiliskt material |
AT375417B (de) * | 1980-11-25 | 1984-08-10 | Escher Wyss Gmbh | Dispergiervorrichtung fuer die aufbereitung von altpapierstoff |
US4851111A (en) * | 1985-08-09 | 1989-07-25 | The Black Clawson Company | Apparatus for screening paper fiber stock |
DE3728890C1 (de) * | 1987-08-29 | 1988-07-14 | Escher Wyss Gmbh | Verfahren zur Regelung der spezifischen Dispergierarbeit |
-
1988
- 1988-08-30 SE SE8803033A patent/SE461919B/sv not_active IP Right Cessation
-
1989
- 1989-08-30 WO PCT/SE1989/000453 patent/WO1990002223A1/en active IP Right Grant
- 1989-08-30 EP EP19890909881 patent/EP0431040B1/en not_active Expired - Lifetime
- 1989-08-30 JP JP50911489A patent/JP2811489B2/ja not_active Expired - Fee Related
- 1989-08-30 AT AT89909881T patent/ATE112337T1/de not_active IP Right Cessation
- 1989-08-30 US US07/651,213 patent/US5176793A/en not_active Expired - Fee Related
- 1989-08-30 DE DE68918594T patent/DE68918594T2/de not_active Expired - Fee Related
- 1989-09-29 CA CA 614728 patent/CA1331709C/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI66927B (fi) * | 1980-02-27 | 1984-08-31 | Sunds Defibrator | Saett och anordning foer avskiljning av aonga |
SE435532B (sv) * | 1983-02-22 | 1984-10-01 | Sunds Defibrator | Sett och anordning for framstellning av fibermassa fran lignocellulosahaltigt material |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1147805A1 (de) * | 2000-04-13 | 2001-10-24 | Voith Paper Patent GmbH | Verfahren zur Dispergierung eines Papierfaserstoffes sowie Anlage zur Durchführung des Verfahrens |
WO2016105270A1 (en) * | 2014-12-22 | 2016-06-30 | Valmet Ab | Arrangement and system for feeding biomass material to a treatment process |
CN107000358A (zh) * | 2014-12-22 | 2017-08-01 | 维美德公司 | 用于将生物质物料馈送至处理过程的布置和*** |
US10385506B2 (en) | 2014-12-22 | 2019-08-20 | Valmet Ab | Arrangement and system for feeding biomass material to a treatment process |
Also Published As
Publication number | Publication date |
---|---|
EP0431040A1 (en) | 1991-06-12 |
DE68918594D1 (de) | 1994-11-03 |
SE8803033L (sv) | 1990-03-01 |
SE8803033D0 (sv) | 1988-08-30 |
DE68918594T2 (de) | 1995-01-26 |
US5176793A (en) | 1993-01-05 |
JPH04500245A (ja) | 1992-01-16 |
JP2811489B2 (ja) | 1998-10-15 |
CA1331709C (en) | 1994-08-30 |
EP0431040B1 (en) | 1994-09-28 |
SE461919B (sv) | 1990-04-09 |
ATE112337T1 (de) | 1994-10-15 |
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