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US20070068640A1 - Method for loading a fibrous stock suspension and arrangement to implement the method. - Google Patents

Method for loading a fibrous stock suspension and arrangement to implement the method. Download PDF

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Publication number
US20070068640A1
US20070068640A1 US10/577,511 US57751104A US2007068640A1 US 20070068640 A1 US20070068640 A1 US 20070068640A1 US 57751104 A US57751104 A US 57751104A US 2007068640 A1 US2007068640 A1 US 2007068640A1
Authority
US
United States
Prior art keywords
fibrous stock
stock suspension
approximately
further including
fibrous
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.)
Abandoned
Application number
US10/577,511
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English (en)
Inventor
Lothar Pfalzer
Klaus Dolle
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
Assigned to VOITH PAPER PATENT GMBH reassignment VOITH PAPER PATENT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DOELLE, KLAUS, PFALZER, LOTHAR
Publication of US20070068640A1 publication Critical patent/US20070068640A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a method for loading a fibrous stock suspension which contains cellulose fibers with calcium carbonate.
  • the current invention describes a method for the production of fiber loaded precipitated calcium carbonate (FLPCC), especially for the production of chemical pulp or utilization of chemical pulp in paper production.
  • the fiber raw material that is to be loaded may—for example—be produced from recycled paper, DIP (deinked paper), secondary fiber stock, bleached or unbleached pulp, mechanical pulp of any type, bleached or unbleached sulfate pulp, broke, linen, cotton, and/or hemp fibers (predominantly used for cigarette paper) and/or any other paper raw material that can be utilized on a paper machine.
  • GCC ground calcium carbonate
  • the filler material utilized in other production processes is replaced with the filler material produced according to the fiber loading process technology.
  • the range of application for the filler produced with the fiber loading process technology extends to the production of paper and to applications for all paper grades, including packaging papers that have a filler content of between 1 and 60% and/or a white liner having a filler content of between 1 and 60%.
  • the range of application of the current invention is not limited to utilization of these fillers in paper producing processes; the invention can be applied in any paper producing process or related process, including the production of chemical pulp. If a fibrous stock suspension is treated with the fiber loading technology during paper production, a completely new product results which offers new and improved characteristics compared to currently known products on the market.
  • the process described below allows for precipitation of the filler (calcium carbonate)—which is attached evenly distributed exclusively in and on the fiber stock, especially the paper fiber—directly during stock preparation in a paper mill.
  • a combination or an individual application of the inventive design variations described below results in that only fibrous stock which is loaded with precipitated calcium carbonate is produced, whereby the calcium carbonate is attached on or in the fibers, or embedded in them; this prevents the formation of loose precipitated calcium carbonate (PCC):
  • An additional wash cycle after the refining process and/or during the refining process and/or after the crystallization process in a crystallizer and/or prior to the headbox chest or prior to entry into the paper machine or by returning the press filtrate to a header tank or another storage arrangement on the infeed side provides that a constant calcium hydroxide content is adjusted or regulated in the infeed system of the fiber loading apparatus.
  • the calcium hydroxide can be added directly in a fiber stock pulper.
  • the press filtrate can be returned into the stock pulper system. Calcium hydroxide that is not converted into calcium carbonate or which does not attach to the fibers is again returned to the preceding processes.
  • the invention especially comprises a method according to which the fibrous stock suspension is fed into a press arrangement intended to squeeze out a filtrate. Subsequently, the filtrate is directed back, at least partially, into a supply-side arrangement for pulping of the fibrous stock suspension, specifically into a reservoir, for example a header tank.
  • the calcium hydroxide is added at least partially in the arrangement for pulping of the fiber stock.
  • a pH value of between 7 and 12, especially between 8 and 12 is maintained.
  • aqueous fibrous stock material especially aqueous paper stock having a consistency of 0.1 to 20%, preferably between 2 and 8% is used as primary raw material.
  • Calcium hydroxide in aqueous or in dry form, or calcium oxide are mixed into the aqueous paper fiber stock in a range of between 0.01 and 60% of the existing solids content.
  • a static mixer, a header tank or a pulper system are utilized for the mixing process; a pH value in the range of between 7 and 12, preferably between 9 and 12 is applied.
  • the reactivity of the calcium hydroxide is between 0.01 and 180 seconds, preferably between 0.05 and 60 seconds.
  • Dilution water is mixed in according to predetermined parameters, to thereby produce an aqueous primary raw material.
  • FL Fiber Loading
  • FL B&P papers FL kraft sack papers
  • the inventive pre-treatment of the fibrous stock suspension also creates the provision for improved drying, thereby increasing the efficiency level in the production of all paper grades. Residual moisture contents in the range of 1 to 20% are advantageous.
  • An additional advantage of the current invention is that greater brightness and/or higher optical values with around 15 or more lightness points are achieved on all grades of paper, cardboard or in various cardboard applications including the white liner on a cardboard layer.
  • the energy supply during the refining process specifically the heat volume and the resulting warming effect are controlled. Crystals in various forms can be produced, according to the control.
  • the current invention provides that a static mixer, a refiner, a disperger and/or a fluffer FLPCC reactor are utilized as a reactor, whereby the fibrous stock content, especially the paper content is between 0.01 and 15% in the instance of a static mixer; at between 2 and 40% in the instance of a refiner and a disperger, especially between 2 and 8% for LC refining and between 20 and 35% for HC-refining and between 15 and 60% in the instance of a fluffer-FLPCC-reactor.
  • the current invention also relates to a method according to which an expenditure of energy of between 0.3 and 8 kWh/t, especially between 0.5 and 4 kWh/t is used for the precipitation reaction, especially if no refining process is utilized.
  • the process temperature is preferably between ⁇ 15° C. and 120° C., especially between 20 and 90° C.
  • Preferably rhombohedral, scalenohedron and spherical crystals are formed, whereby the crystals measure between 0.05 and 5 ⁇ m, especially between 0.3 and 2.5 ⁇ m.
  • Static and/or moving, especially rotating mixing elements may be utilized for the production of a fibrous stock suspension which is loaded with calcium carbonate.
  • the process is preferably carried out in a pressure range of between 0 and 15 bar, especially between 0 and 6 bar. Also, the process is carried out at an pH value that is preferably between 6 and 10, especially between 6.5 and 9.5.
  • the reaction time is here between 0.01 and 180 seconds, especially between 0.05 seconds and 60 seconds.
  • Fibrous stock produced with the fiber loading combination process technology possesses a superior dewatering characteristic when compared with a fibrous stock produced according to conventional methods; the improvement in the dewatering capacity is between 5 to 100 ml CSF or 0.2 to 15° SR, depending upon the required freeness and filler content.
  • This fibrous stock possesses a low water retention value of 2 to 25%, depending upon the raw material that is used in production. Compared to conventional fibrous stock the water can be removed quicker from the fibrous stock suspension, and the fibrous stock dries accordingly faster. This also has a positive effect on remoistening which as a result has diminished in the paper production process, and upon the printability of the produced paper grades.
  • the current invention relates also to a device for the implementation one of the methods described previously.
  • a static mixer in which the fibrous stock suspension is washed is located prior to a dewatering screw.
  • An additional embodiment of the invention provides that fiber stock filtrate which was yielded in the dewatering screw can be returned via a pipe to a header tank or to another upstream device for the preparation of the fibrous stock suspension.
  • an additional static mixer in which the fibrous stock suspension is washed is installed prior to a crystallizer.
  • Another advantageous provision is to locate an additional washer for cleaning of the fibrous stock suspension, following the crystallizer.
  • an additional static mixer in which the fibrous stock suspension is mixed with a filtrate and/or a calcium hydroxide suspension is located prior to the crystallizer.
  • FIG. 1 a first schematic drawing—preparation of a fibrous stock suspension for application in a machine for the production of a fiber web and
  • FIG. 2 a second schematic drawing.
  • a pipe line system 1 ( FIG. 1 ) that is equipped with control valves 2 , 3 is provided for a fibrous stock suspension.
  • the control valve 2 is located in a pipe 4 through which the pipe line system 1 is connected with a static mixer 5 .
  • Dilution water and/or preferably filtrate that is interlaced with calcium hydroxide is added to the mixer 5 via a valve 6 .
  • a tank 7 or a container for storage of the fibrous stock suspension is located following the mixer 5 , viewed in direction of fiber stock flow direction. From the tank 7 the fibrous stock suspension is pumped via a pump 8 to an additional static mixer 9 .
  • Dilution water is also added to the mixer 9 via a valve 10 .
  • the inflow of a calcium hydroxide suspension is controlled through a valve 11 which is located in a line 12 .
  • a preparation unit 13 where solid calcium oxide or calcium hydroxide is added to water.
  • the preparation unit 13 is supplied via a line 14 which is equipped with a valve 15 with water.
  • the suspension that is produced in the preparation unit 13 is directed through a pump 16 into a line 12 .
  • the fibrous stock suspension to which calcium hydroxide was added flows from the mixer 9 into a line 17 through a valve 18 to a dewatering screw 19 where water is removed from the fibrous stock suspension.
  • the water can, for example be returned through a line 20 to the mixer 5 as dilution water.
  • the water that was removed in the dewatering screw 19 may also be routed to a storage tank 21 for the fibrous stock suspension, or it is returned to the mixer 9 . Due to the return flow of calcium hydroxide containing water the pH value can be increased and adjusted, in all instances in the units that are located preceding the dewatering screw 19 .
  • said suspension is brought via a line 22 from the dewatering screw 19 to an equalizing screw 23 .
  • a container 25 (crystallizer).
  • a carbon dioxide storage container 30 For the purpose of supplying carbon dioxide this is connected with a carbon dioxide storage container 30 via a line 29 which is equipped with valves 26 , 27 and a pump 28 .
  • Carbon dioxide is supplied from this container into the crystallizer 25 in order to produce the desired precipitation reaction of calcium hydroxide and carbon dioxide for the formation of calcium carbonate as a filler in the fibers of the fiber stock.
  • carbon dioxide container 30 is connected with the equalizing screw 23 via an additional line 31 which is equipped with a valve 32 and which branches off line 29 .
  • Carbon dioxide can herewith also be supplied to the equalizing screw in order to already achieve at least a partial precipitation there.
  • Line 29 is also connected via an additional valve 33 with a static mixer 34 .
  • This serves to add additional carbon dioxide to the fibrous stock suspension which is flowing from the crystallizer 25 via a line 36 which is equipped with a valve 35 .
  • the fibrous stock suspension flows from the mixer 34 into a mixing chest 37 .
  • a filtration unit 38 may be provided between the mixer 34 and the mixing chest 37 .
  • the filtrate which has been enriched with calcium carbonate is returned into the header tank 7 or into an other downstream unit for the preparation of the dilution water or the fibrous stock suspension.
  • the mixing chest 37 is equipped with a rotor 39 to thoroughly mix the fibrous stock suspension.
  • the fibrous stock suspension then flows either immediately to a head box in a paper machine, or will be subjected to additional mechanical processing, for example in a refiner feed chest.
  • Fibrous stock suspension to which calcium hydroxide has not yet been added can be supplied to the mixer 34 through a pipe line system 1 via the valve 3 and a line 40 in which said valve is installed.
  • white water or process water which has for example been recovered in the wire area or the paper machine or, as already described previously, fibrous stock suspension from the dewatering screw 19 is supplied to the tank 21 .
  • Dilution water may for example be supplied to this tank through a line 41 which is equipped with a valve 42 .
  • the dilution water which is mixed with process water flows through a line 43 , a pump 44 and a valve 45 to the crystallizer 25 .
  • a multitude of possibilities therefore arise to influence the composition of the fibrous stock suspension that is to be produced in various stages of the production process.
  • a fibrous stock suspension is transported for the purpose of being loaded with calcium carbonate in a device 48 ( FIG. 2 ) in a pipe line system that is equipped with control valves 49 , 50 .
  • the control valve 49 is located in a line 51 through which the pipe line system is connected with a static mixer 52 .
  • This mixer can be supplied via a valve 53 with dilution water.
  • an additional valve 55 which is installed in line 54 controls the supply of a suspension of calcium hydroxide.
  • a preparation unit 56 into which solid calcium oxide or calcium hydroxide is fed.
  • water is supplied into the preparation unit 56 via a line which is equipped with a valve 57 .
  • the suspension which is produced in the preparation unit 56 is brought into the line 55 via a pump 58 .
  • the line 65 is connected through an additional valve 67 with a static mixer 68 which serves to add additional carbon dioxide to the fibrous stock suspension flowing from the crystallizer 61 through a line 70 which is equipped with a valve 69 .
  • the fibrous stock suspension flows into a blend chest 71 which is equipped with a rotor 72 for blending the fibrous stock suspension. From the blend chest 71 the fibrous stock suspension flows either immediately to a headbox in a paper machine or is subjected to additional mechanical processing, for example in a refiner feed chest.
  • the blend chest 71 can additionally be supplied via the valve 50 and a line 73 with fiber stock suspension which has not been treated with calcium hydroxide.
  • a refiner 74 may be incorporated in the pipe line system, serving the refining of the fiber stock suspension by means of an additional refining process. Said refiner is supplied with fiber stock suspension via a line 75 which branches off line 59 . From the refiner 74 the fibrous stock suspension which has been refined again is brought through a line 76 into the line 70 and from there, as described above into the storage tank.
  • carbon dioxide is supplied to the refiner 74 from the carbon dioxide storage tank 66 through a line 77 branching off line 65 , and a static mixer 78 connecting line 77 with line 75 .
  • the container 74 additionally assumes the refining process, thereby creating a simple design for the machine line for fiber stock preparation.
  • the refining process serves at the same tune as an agitation process in order to deposit the calcium carbonate in the fibers through a shear process.
  • a filtration unit 79 similar to the filtration unit 38 may be located also between the mixer 68 and the blend chest 71 from where filtrate treated with calcium carbonate is returned into a header tank or into another preceding unit for preparation of the dilution water or the fibrous stock suspension.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
US10/577,511 2003-10-31 2004-09-28 Method for loading a fibrous stock suspension and arrangement to implement the method. Abandoned US20070068640A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10351292A DE10351292A1 (de) 2003-10-31 2003-10-31 Verfahren zum Beladen einer Faserstoffsuspension und Anordnung zur Durchführung des Verfahrens
DE10351292.6 2003-10-31
PCT/EP2004/052331 WO2005042841A1 (de) 2003-10-31 2004-09-28 Verfahren zum beladen einer faserstoffsuspension und anordnung zur durchführung des verfahrens

Publications (1)

Publication Number Publication Date
US20070068640A1 true US20070068640A1 (en) 2007-03-29

Family

ID=34530079

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/577,511 Abandoned US20070068640A1 (en) 2003-10-31 2004-09-28 Method for loading a fibrous stock suspension and arrangement to implement the method.

Country Status (6)

Country Link
US (1) US20070068640A1 (de)
EP (1) EP1682722A1 (de)
CN (1) CN1867732A (de)
BR (1) BRPI0416090A (de)
DE (1) DE10351292A1 (de)
WO (1) WO2005042841A1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060113051A1 (en) * 2003-01-24 2006-06-01 Voith Paper Patent Gmbh Method for creating a fibrous substance suspension used for producing a tissue web or hygiene web
US20070062652A1 (en) * 2003-12-09 2007-03-22 Voith Paper Patent Gmbh Method for charging a fibre suspension and arrangement for carrying out said method
US20070131361A1 (en) * 2003-08-05 2007-06-14 Klaus Doelle Method for charging a fiber suspension, and arrangement for carrying out said method
US20080073043A1 (en) * 2006-09-22 2008-03-27 Akzo Nobel N.V. Treatment of pulp
US20080210391A1 (en) * 2005-07-12 2008-09-04 Lothar Pfalzer Method for loading fibers contained in a pulp suspension
US20090000080A1 (en) * 2004-11-08 2009-01-01 New Jersey Institute Of Technology Solid Hollow Fiber Cooling Crystallization Systems and Methods
US20100106971A1 (en) * 2008-10-27 2010-04-29 Domagoj Premec Method and communication system for protecting an authentication connection
US20130126116A1 (en) * 2010-08-20 2013-05-23 Upm-Kymmene Corporation Method and a system for precipitation of calcium carbonate and a product comprising calcium carbonate
WO2013101655A1 (en) * 2011-12-29 2013-07-04 Hollingsworth & Vose Company Charging of filter media
US20150090284A1 (en) * 2012-06-01 2015-04-02 Delfortgroup Ag Cigarette Paper Comprising Flaky Filler
WO2021191277A1 (de) * 2020-03-24 2021-09-30 Delfortgroup Ag Umhüllungspapier für rauchartikel mit verbessertem aschebild

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI123392B (fi) * 2008-02-22 2013-03-28 Upm Kymmene Oyj Menetelmä kalsiumkarbonaatin saostamiseksi kuiturainaprosessin yhteydessä ja kuiturainakoneen lähestymisjärjestelmä

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
DE10113998A1 (de) * 2001-03-22 2002-09-26 Voith Paper Patent Gmbh Verfahren zum Beladen von in einer Faserstoffsuspension enthaltenen Fasern mit einem Hilfsstoff
US6413365B1 (en) * 2001-07-11 2002-07-02 Voith Paper Patent Gmbh Method of loading a fiber suspension with calcium carbonate

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060113051A1 (en) * 2003-01-24 2006-06-01 Voith Paper Patent Gmbh Method for creating a fibrous substance suspension used for producing a tissue web or hygiene web
US20070131361A1 (en) * 2003-08-05 2007-06-14 Klaus Doelle Method for charging a fiber suspension, and arrangement for carrying out said method
US20070062652A1 (en) * 2003-12-09 2007-03-22 Voith Paper Patent Gmbh Method for charging a fibre suspension and arrangement for carrying out said method
US7754083B2 (en) * 2004-11-08 2010-07-13 New Jersey Institute Of Technology Solid hollow fiber cooling crystallization systems and methods
US20110014110A1 (en) * 2004-11-08 2011-01-20 New Jersey Institute Of Technology Solid Hollow Fiber Cooling Crystallization Methods
US20090000080A1 (en) * 2004-11-08 2009-01-01 New Jersey Institute Of Technology Solid Hollow Fiber Cooling Crystallization Systems and Methods
US20080210391A1 (en) * 2005-07-12 2008-09-04 Lothar Pfalzer Method for loading fibers contained in a pulp suspension
US20080073043A1 (en) * 2006-09-22 2008-03-27 Akzo Nobel N.V. Treatment of pulp
US8728274B2 (en) * 2006-09-22 2014-05-20 Akzo Nobel N.V. Treatment of pulp
US20100106971A1 (en) * 2008-10-27 2010-04-29 Domagoj Premec Method and communication system for protecting an authentication connection
US20130126116A1 (en) * 2010-08-20 2013-05-23 Upm-Kymmene Corporation Method and a system for precipitation of calcium carbonate and a product comprising calcium carbonate
US9051689B2 (en) * 2010-08-20 2015-06-09 Upm-Kymmene Corporation Method for precipitating calcium carbonate
WO2013101655A1 (en) * 2011-12-29 2013-07-04 Hollingsworth & Vose Company Charging of filter media
US20150090284A1 (en) * 2012-06-01 2015-04-02 Delfortgroup Ag Cigarette Paper Comprising Flaky Filler
US9775378B2 (en) * 2012-06-01 2017-10-03 Delfortgroup Ag Cigarette paper comprising flaky filler
WO2021191277A1 (de) * 2020-03-24 2021-09-30 Delfortgroup Ag Umhüllungspapier für rauchartikel mit verbessertem aschebild

Also Published As

Publication number Publication date
EP1682722A1 (de) 2006-07-26
DE10351292A1 (de) 2006-02-02
CN1867732A (zh) 2006-11-22
BRPI0416090A (pt) 2007-01-02
WO2005042841A1 (de) 2005-05-12

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Date Code Title Description
AS Assignment

Owner name: VOITH PAPER PATENT GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PFALZER, LOTHAR;DOELLE, KLAUS;REEL/FRAME:017943/0787

Effective date: 20060503

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION