EP1253237A2 - Procédé et dispositif de préparation d'additifs, notamment pour la fabrication de papier - Google Patents

Procédé et dispositif de préparation d'additifs, notamment pour la fabrication de papier Download PDF

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Publication number
EP1253237A2
EP1253237A2 EP02002735A EP02002735A EP1253237A2 EP 1253237 A2 EP1253237 A2 EP 1253237A2 EP 02002735 A EP02002735 A EP 02002735A EP 02002735 A EP02002735 A EP 02002735A EP 1253237 A2 EP1253237 A2 EP 1253237A2
Authority
EP
European Patent Office
Prior art keywords
substance
buffer
screw
fabric
soaking
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Withdrawn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
EP02002735A
Other languages
German (de)
English (en)
Other versions
EP1253237A3 (fr
Inventor
Klaus Dölle
Oliver Heise
Werner Witek
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 Patent GmbH
Original Assignee
Voith Paper Patent 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1253237A2 publication Critical patent/EP1253237A2/fr
Publication of EP1253237A3 publication Critical patent/EP1253237A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/70—Inorganic compounds forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately

Definitions

  • the invention relates to a method and a device for processing especially papermaking material.
  • Pulp for the production of paper and cardboard is used in the paper machine upstream fiber preparation so processed that the desired Paper properties such as mechanical properties, optical Properties etc. can be achieved.
  • Additives, e.g. Fillers are added.
  • Fiber Loading with an additive e.g. Filler
  • an additive e.g. Filler
  • a chemical precipitation reaction i.e. in particular through a so-called “fiber Loading TM”
  • the wetted Fiber surfaces of the fiber material at least one additive, in particular Filler, stored.
  • the fibers can, for example, with Calcium carbonate can be loaded.
  • the moist, disintegrated Fiber material calcium oxide and / or calcium hydroxide added so that at least part of it deals with the water present in the fiber material associated.
  • the fiber material treated in this way is then carbon dioxide applied.
  • the calcium hydroxide preferably in liquid Form (milk of lime) is added. This means that not necessarily that possibly in or on the fibers of the fiber suspension Accumulated water is necessary for the start and completion of the chemical reaction is.
  • the fiber suspension must also be used for this "Fiber Loading TM" process be pretreated accordingly. So far, a conventional one Processing system used, consisting of a dissolving unit, various Sorting devices and drainage machines can exist.
  • the aim of the invention is to provide an improved method and an improved To create device of the type mentioned, in which the required Effort is reduced to a minimum.
  • this object is achieved by a preparation method of, in particular, papermaking material in which the substance cleaned, the cleaned fabric soaked in a soaking screw, and the soaked substance is fed to a pulper.
  • the presses previously used for Drainage especially the previously common sieve and Screw presses, as well as the sorting devices previously used, are no longer required and cleaner.
  • the calcium hydroxide or calcium oxide can possibly be directly in the area be added to the soaking screw and / or in the area of the pulper.
  • the Reduced susceptibility to faults. The fibers are processed through a "Fiber Loading TM" process loaded with additive, the solubilizer can function as before Take over usual pressure termination device, which can be omitted.
  • the fibers contained in the fabric are preferably chemical Precipitation reaction can be loaded with an auxiliary, that can The method according to the invention in principle also only for dissolving and without the Implementation of a "Fiber Loading TM" process.
  • a soaking screw that is not pressurized is advantageous used.
  • the process in the soaking screw is preferably carried out by the process Spray with liquid, especially water, to a consistency in one Range from about 15% to about 40%, preferably in a range from about 20% to about 35%, soaked. Soaking should be as gentle as possible respectively. Appropriate spraying systems or the like are used.
  • the softened substance is advantageously in the pulper at one Consistency in a range from about 15% to about 35%, preferably in one Range from about 20% to about 35%, at least substantially complete dissolved.
  • a pulper or pulper which is a housing, is advantageously used with a fiber inlet, at least one water inlet, at least one Outlet and an inner chamber and a plurality of with the Connected housing, extending stationary into the inner chamber Dissolving elements and a shaft extending through the inner chamber comprises around which a screw is arranged in the region of the fiber inlet and the plurality of movable disengagement elements extending from it wearing.
  • solubilizer is described in US 09 440 225.
  • the solubilizer can in particular be designed as this is specified in this US 09 440 225.
  • the pulper in the area its outlet for example, preferably a throttle cone Include valve. Basically, however, is an embodiment without such Valve possible.
  • the pre-sorted and cleaned material can be in the form of a bale, for example provided and by means of a conveyor, in particular a conveyor belt or the like, via a wiring device with integrated Magnetic separator are fed to the soaking screw.
  • the substance to be dissolved can in particular be any one Trade paper raw material if the substance in question is free of impurities and has a raw material quality of pulp.
  • the substance can be used for the chemical precipitation reaction for example calcium hydroxide and / or calcium oxide can be added.
  • auxiliary material is preferably produced from precipitated calcium carbonate.
  • the calcium hydroxide or calcium oxide can, for example, in the range of Soaking screw and / or in the area of the pulper.
  • Calcium hydroxide is advantageously in liquid form with a consistency in in a range from about 1% to about 60% (mass%), preferably in one Range of about 15% to 25%, and / or calcium oxide added in solid form.
  • the soaking drum or screw can supplied water can be used with the calcium oxide To form calcium hydroxide, which is then in the subsequent "Fiber Loading TM" process converted to calcium carbonate after the addition of carbon dioxide can be.
  • the substance is processed using a pump disperger after the substance dissolver or -fluffer fed and acted upon by shear forces in order to larger Break up fiber agglomerates into smaller or even individual fibers, whereby the pump disperger or buffer preferably at the same time as a reactor for the chemical precipitation reaction is used.
  • a pump disperger or buffer is preferably used, the Reaction channel between two opposite, relative to each other rotating plates or the like is formed with structured surfaces, the substance in this reaction channel generally radially outwards is transported.
  • Such a pump disperger or buffer is in DE 10, which has not yet been published 107 448.4.
  • the pump disperger or buffer can also do the rest be carried out as specified in this DE 10 107 448.4.
  • the pulper In the area of its outlet, the pulper comprises a preferably as Throttle plug designed valve, this is the pump disperger or buffer sealed on the inlet side by this valve of the pulper. A seal by forming a plug in the area in front of the pump disperger or buffer can therefore be omitted.
  • the pump disperger or buffer is sealed on the inlet side by that the substance compacted to form a plug and that to a plug compressed material is fed to the pump disperger or buffer.
  • the valve of the material dissolver designed as a throttle cone can be omitted.
  • a separately drivable is preferably used to form the plug of material Graft screw provided.
  • the fibers are to be loaded with the filler calcium carbonate, it is an advantage if carbon dioxide in the area of the pump disperger or fluffer is initiated and the pump disperger or buffer at the same time as a reactor Implementation of the starting materials mentioned calcium oxide or calcium hydroxide and carbon dioxide in the reaction products calcium carbonate and water is used in the reaction channel, the flow rate of Fibrous suspension is preferably reduced.
  • wetted fiber surfaces can mean all wetted surfaces of the individual fibers. This also includes the case, in particular with the fibers both on their outer surface and inside (lumen) Load calcium carbonate or any other precipitation product become.
  • the fibers can e.g. load with the filler calcium carbonate be, the attachment to the wetted fiber surfaces by a
  • the so-called “Fiber Loading TM” process is carried out as it is in US-A-5 223 090 is described.
  • this "Fiber Loading TM” process e.g. the Carbon dioxide with the calcium hydroxide to water and calcium carbonate.
  • the device according to the invention for processing in particular the Papermaking material accordingly includes means for cleaning the Fabric, a soaking screw for soaking the cleaned fabric and a pulper to dissolve the soaked fabric.
  • Figure 1 shows the essential in a simplified schematic representation Method steps of an exemplary embodiment of the method for Preparation of material used in particular for papermaking.
  • step "1" the pre-sorted and cleaned material in bale form saved and provided.
  • steps “2" and “3” the cleaned substance is then conveyed using a conveyor, in particular a conveyor belt or the like, for example via a Wiring device with integrated magnetic cutter one Soaking screw supplied, by means of which the fabric is then soaked in step "4" becomes.
  • a conveyor in particular a conveyor belt or the like
  • a Wiring device with integrated magnetic cutter one Soaking screw supplied by means of which the fabric is then soaked in step "4" becomes.
  • segregation can in particular also take place and for Removal of metal parts e.g. a metal detector can be used.
  • a shredder for example.
  • the soaked substance is a pulper or pulper in step "5" fed.
  • the dissolved substance can be loaded with an auxiliary such as calcium carbonate, in particular by a so-called “Fiber Loading TM” process by a chemical precipitation reaction.
  • an auxiliary such as calcium carbonate
  • calcium hydroxide (Ca (OH) 2 ) and / or calcium oxide (CaO) is added to the substance for the corresponding chemical precipitation reaction.
  • the calcium hydroxide or calcium oxide can be used, for example, in the area of the shredder optionally used, for example, between steps “3" and "4", in the area of the soaking screw (see step “4") and / or in the area of the used in step "5" Dissolver or pulpers are added.
  • step "6" relating to the "Fiber Loading TM” process with the addition of carbon dioxide (CO 2 ) ,
  • Figure 2 shows a corresponding representation in a schematic representation Stock preparation device 10, which in particular for the preparation of the papermaking substance can be provided.
  • the device 10 comprises means (not shown) for cleaning the fabric, a soaking screw 12 for soaking the cleaned substance, one Dissolver or pulper 14 to dissolve the soaked substance and a Reactor for the chemical precipitation reaction device, which at The present exemplary embodiment is designed as a pump disperger or buffer 16 and is used in particular to carry out a "Fiber Loading TM" process.
  • the soaking screw 12 which is preferably not pressurized, comprises a Soaking drum 18 and a screw element 20 extending therein, through which the purified material introduced via an inlet 22 to an outlet 24 is funded.
  • the cleaned material of the soaking screw 12 for example, with a consistency in a range from about 15% to about 40% can be supplied.
  • the soaking screw 12 is equipped with a spray or a spray system 26 provided to the liquid introduced into the soaking drum 18 with liquid, especially water, spray and soak accordingly.
  • the shaft 28 carrying the screw element 20 is via a drive 30 drivable, in the area of which the shaft 28 is mounted in a bearing 32.
  • a appropriate storage is also provided on the other shaft end.
  • This Material dissolver 14 comprises a housing 34 with a fiber or material inlet 36, at least one water inlet 38, at least one outlet 40 and one inner chamber 42.
  • this pulverizer 14 has a plurality of connected to the housing 34, extending into the inner chamber 42 stationary opening elements 44 and one through the inner chamber extending shaft 46 around which a screw is located in the region of the fiber inlet 36 48 is arranged and the plurality of which extend away from it movable trigger elements 50 carries. These opening elements 50 thus rotate with the shaft 46, which is driven by an external drive 52.
  • the wave is stored in two bearings 54 arranged outside the housing 34.
  • the pulper 14 In the area of its outlet 40 is the pulper 14 with a valve 56 provided, which is designed as a throttle cone in the present case. About this The outlet quantity can be adjusted accordingly.
  • the substance is the pump disperger or - fluffer 16 fed and acted upon by shear forces in order to larger Break up fiber agglomerates into smaller or even individual fibers.
  • the pump disperger or buffer 16 is used at the same time as a device or reactor for a chemical precipitation reaction.
  • this pump disperger or buffer 16 can have a reaction channel 58 possess that between two opposite, relative to each other rotating plates 60 or the like are formed with structured surfaces 60 ' is.
  • this reaction channel 60 the substance is generally radially outward transported.
  • reaction channel 58 can have one Feed screw 62 may be connected upstream, at least substantially cylindrical channel or housing 64 is arranged.
  • the cylindrical channel 64 may have an inlet 66 for supplying the from the dissolver 14 coming material.
  • the pump disperger or buffer is 16 on the inlet side through the valve 40 of the pulper designed as a throttle cone 14 sealed.
  • the pump disperger or buffer 16 can be on the inlet side for example, be sealed in that the material by means of a preferably separately driven plug screw to form a Graft compacted and the material compacted to a graft Pump disperger or buffer 16 is supplied. In this case, this can be done by a throttle cone valve 40 is eliminated.
  • the pump disperger or buffer 16 can simultaneously act as a reactor for implementation of the starting materials calcium oxide or calcium hydroxide and carbon dioxide in the Reaction products calcium carbonate and water can be provided.
  • the Calcium hydroxide or calcium oxide can, for example, in the range of Soaking screw and / or in the area of the pulper 14 are added.
  • the carbon dioxide can be supplied in the area of the pump disperger or buffer 16 become.
  • the pump disperger or buffer 16 can thus be used in particular for the reactor Implementation of the starting materials calcium oxide or calcium hydroxide and Form carbon dioxide in the reaction products calcium carbonate and water. In that formed between the two plates 60 with a structured surface Reaction channel 58, the material is transported radially outwards and with Load calcium carbonate.
  • the relative speed of the two opposing plates 60 or structured surfaces is preferably adjustable, at least a plate rotates.
  • the absolute speed can also be used be adjustable. This can affect the discharge rate in particular become.
  • a swirl cross 68 can be provided, through which the Fabric loosened further and accordingly the areas of the fiber material be enlarged.
  • the pump disperger or buffer 16 can, at least essentially arranged tangentially to the plates 60 or structured surfaces Have outlet 70 for the loaded fabric.
  • the pump disperger or buffer 16 an at least substantially tangential to the plates 60 or structured surface 60 'arranged inlet 72 for diluting the own loaded substance with water and / or calcium hydroxide.
  • the pump disperger or buffer 16 can be equipped with a heater be provided, via which the reaction temperature can be influenced.
  • Exemplary material densities are shown at various points in FIG specified. So the consistency in the area of the inlet 22 of the Soaking screw 12, for example 15% to 40%, in the area of the inlet 66 the pump disperger or fluffers 16, for example 15% to 35% and in Area of the outlet 70 of the pump disperger or buffer 16, for example 3 % to 5%. In principle, however, other density values are also possible.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
EP02002735A 2001-04-27 2002-02-07 Procédé et dispositif de préparation d'additifs, notamment pour la fabrication de papier Withdrawn EP1253237A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10120636 2001-04-27
DE2001120636 DE10120636A1 (de) 2001-04-27 2001-04-27 Verfahren und Vorrichtung zur Aufbereitung von insbesondere der Papierherstellung dienendem Stoff

Publications (2)

Publication Number Publication Date
EP1253237A2 true EP1253237A2 (fr) 2002-10-30
EP1253237A3 EP1253237A3 (fr) 2003-01-22

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Application Number Title Priority Date Filing Date
EP02002735A Withdrawn EP1253237A3 (fr) 2001-04-27 2002-02-07 Procédé et dispositif de préparation d'additifs, notamment pour la fabrication de papier

Country Status (2)

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EP (1) EP1253237A3 (fr)
DE (1) DE10120636A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009056178A1 (fr) * 2007-10-30 2009-05-07 Voith Patent Gmbh Procédé de formation de carbonate de calcium dans une suspension de matière fibreuse

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE541532C2 (en) * 2018-03-12 2019-10-29 Valmet Oy Arrangement and method for transporting pulp from one process stage to a subsequent process stage

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8203580A (nl) * 1982-09-15 1984-04-02 Dollard Karton Bv Werkwijze en inrichting ter bereiding van papier of karton.
DE3708873C2 (de) * 1987-03-18 1996-04-04 Baehre & Greten Verfahren und Vorrichtung zur Herstellung eines rieselfähigen, insbesondere zur Fertigung von Platten bestimmten Gemisches aus faserigem und/oder spanförmigem Holzmaterial und Gips
AT395180B (de) * 1989-08-16 1992-10-12 Andritz Ag Maschf Verfahren zur zerkleinerung von materialien und anlage zu dessen durchfuehrung
DE4037230A1 (de) * 1990-11-23 1992-05-27 Voith Gmbh J M Verfahren und anlage zum aufbereiten von altpapier
US5223090A (en) * 1991-03-06 1993-06-29 The United States Of America As Represented By The Secretary Of Agriculture Method for fiber loading a chemical compound
US5679220A (en) * 1995-01-19 1997-10-21 International Paper Company Process for enhanced deposition and retention of particulate filler on papermaking fibers
CN1157016A (zh) * 1995-06-12 1997-08-13 安德里兹·斯普劳特-鲍尔有限公司 低停留时间、高温和高速的木屑研磨
FI100729B (fi) * 1995-06-29 1998-02-13 Metsae Serla Oy Paperinvalmistuksessa käytettävä täyteaine ja menetelmä täyteaineen va lmistamiseksi
FR2741638B1 (fr) * 1995-11-29 1998-02-20 Clextral Procede et installation de preparation en continu d'une pate de cellulose
KR20010021984A (ko) * 1997-07-18 2001-03-15 스페이스 씨. 슬레이터 충전재 물질을 포함하는 종이 제품
DE19821473A1 (de) * 1998-05-13 1999-11-25 Concordia Ind Holding Ag Verfahren zum Behandeln von Hygieneprodukten aus absorbierenden Verbundstoffen zur Wertstoffgewinnung
DE19844532A1 (de) * 1998-09-29 2000-03-30 Albert M Huber Vorrichtung zum Durchfeuchten von Faserstoffballen, aus der Papier- und Zellstoffindustrie, zur Verbesserung der Auflösefähigkeit in nachgeschalteten Apparaturen
EP1096062B1 (fr) * 1999-10-29 2004-02-11 Voith Paper Patent GmbH Procédé pour améliorer l'homogénéité et le degré de blancheur de pâtes à papier
US6355138B1 (en) * 2000-02-24 2002-03-12 Voith Sulzer Paper Technology North America, Inc. Method of chemically loading fibers in a fiber suspension
DE10033805A1 (de) * 2000-05-26 2001-11-29 Voith Paper Patent Gmbh Verfahren zur Behandlung einer Faserstoffsuspension und Fluffer zur Durchführung des Verfahrens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009056178A1 (fr) * 2007-10-30 2009-05-07 Voith Patent Gmbh Procédé de formation de carbonate de calcium dans une suspension de matière fibreuse

Also Published As

Publication number Publication date
DE10120636A1 (de) 2002-10-31
EP1253237A3 (fr) 2003-01-22

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