EP1312712A2 - Verfahren und Behälter zum Stapeln von hochkonsistentem Papierfaserstoff - Google Patents
Verfahren und Behälter zum Stapeln von hochkonsistentem Papierfaserstoff Download PDFInfo
- Publication number
- EP1312712A2 EP1312712A2 EP02022093A EP02022093A EP1312712A2 EP 1312712 A2 EP1312712 A2 EP 1312712A2 EP 02022093 A EP02022093 A EP 02022093A EP 02022093 A EP02022093 A EP 02022093A EP 1312712 A2 EP1312712 A2 EP 1312712A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- volume
- rotor
- paper pulp
- sieve
- screw
- 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.)
- Granted
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/04—Flat screens
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/28—Tanks for storing or agitating pulp
Definitions
- the invention relates to a method according to the preamble of claim 1.
- Methods of this type are used to make up already dissolved paper pulp a dryness, e.g. B. is between 20 and 40% to stack so that it over a desired dwell time remains in this state, e.g. B. the pulp too stockpile or run a chemical reaction.
- a Containers used to hold the paper pulp. It is known to many chemical reactions require a minimum dwell time, although there are cases where the dwell time must not be undercut or exceeded, i.e. within a certain bandwidth should be.
- a typical application is bleaching of highly consistent paper pulp. Basically there is a higher consistency aimed at firstly to keep the required volume as low as possible and second, to favor the effectiveness of the chemical reaction. As a rule, too a temperature set well above that of the environment.
- the paper pulp is not pumpable in the stack consistency, which makes it difficult to use. For this reason, the paper pulp is after Dilution of the chemical reaction at least to such an extent that it is pumpable. This dilution is often done outside the container because the dilution is inside the container Container can lead to operational safety problems.
- a method is known from DE 198 26 879 A1, in which the above-mentioned method is also used Dilution takes place within the stacking container.
- the known method is special effective when two different rotors in the dilution area of the container interact. However, this additional effort is not possible in all cases or appropriate. In many cases there is also no space for the second drive.
- DE-OS 35 22 395 C1 shows a storage container (tower) for waste paper. This serves the chemical treatment of dirty undissolved waste paper. The procedure aims to chemically and in the raw paper to pretreat the highly consistent condition so that it can then be Container bottom arranged opening rotor can be edited.
- the described storage container and the opening rotor on the unresolved so still raw material to be resolved and designed accordingly.
- EP 0 475 669 B1 shows a stacking container in the bottom area of which one Dilution by adding water and mixing using a propeller he follows. This procedure leads to a pumpable suspension can be produced, but this is very uneven, so that e.g. it is proposed Pumps to be placed in different places, the different material densities of the Tolerate suspension.
- the formation of the suspension is supported by that arranged in front of the rotor Screw spiral. It can simply be placed on the rotor so that it is from this is driven. In the preferred embodiment, the axial conveying effect of the Helix so directed that the suspension is perpendicular to the screen surface and leads away from this. This creates shear and frictional forces that are gentle are and yet strong enough for the intended dissolution process.
- Fig. 1 shows the lower part of a container for stacking and diluting Paper pulp.
- the container is essentially rotationally symmetrical with vertical center line and contains a first volume 1 (only partially drawn) and a second volume 2.
- the first volume 1 serves to hold the highly consistent paper pulp, which - as already mentioned - stacked in it or treated with chemicals.
- Between the two parts of the container is a frustoconical transition, whereby the flow cross-sectional area in downstream direction is reduced. This results in a large stack volume and prevents the highly consistent paper pulp from becoming uncontrollable sliding down.
- the boundary 10 between the highly consistent fiber and the im second volume 2 of diluted fibrous material is indicated by dashed lines.
- Dilution water W is applied through the side Dilution water pipes 9 and 9 'supplied.
- the existing in the second volume 2 Suspension is put into a circulation flow 3 by a rotor 4, which is only indicated here by two arrows.
- the rotor 4 belongs to one Screening device 13, which has a screen 5.
- the sieve 5 contains openings 6 that a Pass part of the paper pulp moving in the second volume 2 as suspension S. can, which is then discharged through the Gutstoffstutzen 11.
- the rotor 4 is here e.g. as Wing rotor formed in the immediate vicinity of the screen 5, i.e. at a distance between 1 and 10 mm.
- the screw spiral 7 is arranged in front of the rotor 4, i.e. on which not the sieve 5 facing side. It is attached to the rotor 4 concentrically with it, rotates so with the same rotational frequency. She is trained to be through her Rotational movement produces a flow 8 which the suspension in the direction of the axis Helix 7 and away from the sieve 5 promotes. In cooperation with that opposite flow 3, vortex flows 8 'form with the positive effects already mentioned.
- the addition of the dilution water W can e.g. through the addition tube 9 in the thickened fibrous material take place or through the addition tube 9 'in the area of Circulation flow 3 immediately before it reaches the limit 10.
- Fig. 2 shows the lower part of the container in an external view opposite the 1 is offset by 90 °. It essentially shows the outer part of the Screening device 13 and the accept nozzle 11 for the rejected suspension S. Here a removable cover 12 is also drawn, which covers a man hole, which facilitates maintenance and possible repairs in this area.
- a screen 14 is passed through partially and without screen openings 5, which drives both the rotor 4 and the screw helix 7 here.
- the axial height H corresponds to the screw helix 7 with which it protrudes beyond the rotor 4 preferably at least 30% of the outer diameter D of the rotor 4.
- the outer diameter D1 of the screw helix 7 can be selected such that it is at least 20% of the outer diameter D of the rotor 4.
- the direction of rotation goes from the movement arrow 15, which refers to a part of the screw spiral relates to the viewer of this figure.
- a flow 8 forms, which is the suspension transported away from the screen 5 in the direction of the axis of this screw spiral.
- the production of such a screw helix is known per se. You can e.g. by placing a helical surface 16 on a core 17 is welded on. But this can only be seen as an example.
- the rotor 4 can with Advantageously have a number of vanes 18 which, due to their rotation, have a Generate conveying effect from radially inside to radially outside. It is hydraulic with the Effect of a centrifugal pump comparable.
- the sieve 5 is in the form of a flat ring Disc made, therefore easy to manufacture and space-saving.
- Figs. 1 and 2 are substantially cylindrical in shape with a truncated cone inserted between them, can - as Fig. 4 shows - the second Volume 2 are formed by a horizontal cylinder, on the cylinder wall Screening device 13 is attached.
- the circulation flow 3 in Form the circumferential direction particularly favorably, which may detach the highly consistent fiber at the border 10 favors.
- the circulation flow 3 also contains a rotational component 3 ', which has essentially the same center line as the rotor 4.
- a rotational component 3 ' which has essentially the same center line as the rotor 4.
- a horizontal cylinder is used for the volume 2, rotor 4 and screw helix 7 are arranged on the end face thereof.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Stackable Containers (AREA)
- Accessories For Mixers (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
- Fig. 1
- einen Behälter zur Ausführung des erfindungsgemäßen Verfahrens, geschnitten in Seitenansicht;
- Fig. 2
- eine andere Seitenansicht des Gegenstandes der Fig. 1;
- Fig. 3
- den Bereich des Rotors etwas detaillierter;
- Fig. 4 und 5
- je eine weitere Variante mit geänderter Behälterform.
Claims (17)
- Verfahren zum Stapeln und Verdünnen von Papierfaserstoff, welcher im hochkonsistenten Zustand in einem ersten Volumen (1) während einer definierten Verweilzeit gestapelt und anschließend in ein zweites Volumen (2) gebracht wird, welches sich dem ersten stromabwärts anschließt und in dem der Papierstoff mindestens so weit verdünnt wird, bis er pumpfähig ist und als Suspension (S) durch ein Sieb (5) hindurch abgezogen wird,
wobei im zweiten Volumen (2) eine Zirkulationsströmung (3) erzeugt wird, die den am Rande des ersten Volumens (1) befindlichen hochkonsistenten Papierfaserstoff abträgt, verdünnt und dem mit einem rotierenden Rotor (4) freigehaltenen Sieb (5) zuführt,
dadurch gekennzeichnet, dass mit Hilfe einer unmittelbar vor dem Rotor (4) angeordneten Schneckenwendel (7) eine Strömung (8) erzeugt wird, die in Achsrichtung der Schneckenwendel (7) verläuft und die Suspension (S) von dem Sieb (5) wegführt. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass die Schneckenwendel (7) mit derselben Drehfrequenz bewegt wird wie der Rotor (4). - Verfahren nach Anspruch 2,
dadurch gekennzeichnet, dass die Schneckenwendel (7) mit dem Rotor (4) verbunden ist. - Verfahren nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet, dass die Schneckenwendel (7) so angeordnet wird, dass ihre Mittellinie waagerecht liegt. - Verfahren nach Anspruch 1, 2, 3 oder 4,
dadurch gekennzeichnet, dass der hochkonsistente Papierfaserstoff eine krümelige Struktur hat. - Verfahren nach Anspruch 1, 2, 3, 4 oder 5,
dadurch gekennzeichnet, dass der hochkonsistente Papierfaserstoff aufgelöstes, gereinigtes und anschließend wieder eingedicktes Altpapier ist. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass der hochkonsistente Papierfaserstoff im ersten Volumen (1) einen Feststoffgehalt von 20 bis 40 % hat. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass der Papierfaserstoff aus dem zweiten Volumen (2) mit einem Feststoffgehalt von höchstens 8 % abgezogen wird. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Zirkulationsströmung (3) durch den Rotor (4) erzeugt wird. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass der Papierfaserstoff vom ersten Volumen (1) zum zweiten Volumen (2) durch eine sich allmählich verengende Strömungsquerschnittfläche geführt wird, wobei die stromabwärtige Strömungsquerschnittfläche höchsten 80 % der stromaufwärtigen hat. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass das zweite Volumen (2) unterhalb des ersten Volumens (1) liegt. - Behälter zur Durchführung des Verfahrens nach einem der Ansprüche 3 bis 11, welcher in seinem oberen Bereich ein erstes Volumen (1) zur Aufnahme des Papierfaserstoffs im hochkonsistenten Zustand enthält und in seinem unteren Bereich ein zweites Volumen (2), in dem Mittel zur hydraulischen Umwälzung, zum Verdünnen und Ausleiten des verdünnten Papierfaserstoffes vorhanden sind sowie eine Siebvorrichtung (13), die mindestens ein Sieb (5) und mindestens einen Rotor (4) enthält und dass der verdünnte Papierfaserstoff durch das Sieb (5) hindurch abgezogen werden kann,
dadurch gekennzeichnet, dass im zweiten Volumen (2) auf dem Rotor (4) eine Schneckenwendel (7) angebracht ist, die auf Grund ihrer Geometrie bei Betriebsdrehzahl in axialer Richtung von dem Sieb (5) wegfördert - Behälter nach Anspruch 12,
dadurch gekennzeichnet, dass die Förderrichtung der Schneckenwendel (7) waagerecht ist. - Behälter nach einem der Ansprüche 12 oder 13,
dadurch gekennzeichnet, dass das Sieb (5) eine ebene, mit Öffnungen (6) versehene Platte ist. - Behälter nach einem der Ansprüche 12 bis 14,
dadurch gekennzeichnet, dass die axiale Höhe (H) der Schneckenwendel (7) über dem Rotor (4) mindestens 30 % des Außendurchmessers (D) des Rotors (4) entspricht. - Behälter nach einem der Ansprüche 12 bis 15,
dadurch gekennzeichnet, dass der Außendurchmesser (D1) der Schneckenwendel (7) mindestns 20 % des Außendurchmessers (D) des Rotors (4) entspricht. - Behälter nach einem der Ansprüche 12 bis 16,
dadurch gekennzeichnet, dass die Schneckenwendel (7) mit schraubenförmigen Flächen (16) versehen ist, die am Umfang zur achsennormalen Fläche einen Winkel zwischen 5 und 30° aufweisen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10156201A DE10156201C1 (de) | 2001-11-15 | 2001-11-15 | Verfahren und Behälter zum Stapeln von hochkonsistentem Papierfaserstoff |
DE10156201 | 2001-11-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1312712A2 true EP1312712A2 (de) | 2003-05-21 |
EP1312712A3 EP1312712A3 (de) | 2004-01-02 |
EP1312712B1 EP1312712B1 (de) | 2006-11-22 |
Family
ID=7705899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02022093A Expired - Lifetime EP1312712B1 (de) | 2001-11-15 | 2002-10-02 | Verfahren und Behälter zum Stapeln von hochkonsistentem Papierfaserstoff |
Country Status (5)
Country | Link |
---|---|
US (1) | US6986829B2 (de) |
EP (1) | EP1312712B1 (de) |
JP (1) | JP2003193390A (de) |
AT (1) | ATE346183T1 (de) |
DE (2) | DE10156201C1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006055316B3 (de) * | 2006-11-23 | 2008-01-31 | Voith Patent Gmbh | Siebapparat für eine verschmutzte Faserstoffsuspension und seine Verwendung |
FI122950B (fi) * | 2007-10-26 | 2012-09-14 | Upm Kymmene Corp | Massasäiliö ja menetelmä massan purkamiseksi massasäiliöstä |
US8869988B2 (en) * | 2008-05-08 | 2014-10-28 | M-I L.L.C. | Cooling and classifying apparatus for pelletized product processing |
WO2012048298A2 (en) | 2010-10-08 | 2012-04-12 | Caridianbct, Inc. | Methods and systems of growing and harvesting cells in a hollow fiber bioreactor system with control conditions |
US9617506B2 (en) | 2013-11-16 | 2017-04-11 | Terumo Bct, Inc. | Expanding cells in a bioreactor |
US11008547B2 (en) | 2014-03-25 | 2021-05-18 | Terumo Bct, Inc. | Passive replacement of media |
JP6830059B2 (ja) | 2014-09-26 | 2021-02-17 | テルモ ビーシーティー、インコーポレーテッド | スケジュール化された細胞フィーディング |
WO2017004592A1 (en) | 2015-07-02 | 2017-01-05 | Terumo Bct, Inc. | Cell growth with mechanical stimuli |
US11965175B2 (en) | 2016-05-25 | 2024-04-23 | Terumo Bct, Inc. | Cell expansion |
US11685883B2 (en) | 2016-06-07 | 2023-06-27 | Terumo Bct, Inc. | Methods and systems for coating a cell growth surface |
US11104874B2 (en) | 2016-06-07 | 2021-08-31 | Terumo Bct, Inc. | Coating a bioreactor |
CN117247899A (zh) | 2017-03-31 | 2023-12-19 | 泰尔茂比司特公司 | 细胞扩增 |
US11624046B2 (en) | 2017-03-31 | 2023-04-11 | Terumo Bct, Inc. | Cell expansion |
WO2019175894A1 (en) * | 2018-03-13 | 2019-09-19 | Mahindra & Mahindra Limited | Concealed air vent apparatus in vehicle and a method thereof |
USD891852S1 (en) | 2018-12-20 | 2020-08-04 | Hall Of Fame Innovations Llc | Cooking pan |
USD878860S1 (en) | 2018-12-20 | 2020-03-24 | Smoke Staxx Pans Llc | Cooking rack |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0323749A2 (de) * | 1988-01-05 | 1989-07-12 | A. Ahlstrom Corporation | Verfahren und Mittel um die Entleerung eines Fallrohrs oder dergleichen zu erleichtern und die Behandlung von Pulpe im besagten Fass |
US5407538A (en) * | 1990-07-02 | 1995-04-18 | E & M Lamort | Device for separating a mixture of paper pulp and contaminants |
EP0475669B1 (de) * | 1990-09-05 | 1995-11-29 | A. Ahlstrom Corporation | Massenturm und Vorrichtung zum dessen Ablassen |
DE19826879A1 (de) * | 1998-06-17 | 1999-12-30 | Voith Sulzer Papiertech Patent | Verfahren und Behälter zum Stapeln von hochkonsistentem Papierfaserstoff |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3293117A (en) * | 1963-03-27 | 1966-12-20 | Improved Machinery Inc | High density pulp mixing |
FR2441681A1 (fr) * | 1978-11-17 | 1980-06-13 | Lamort E & M | Perfectionnements aux procedes et appareils de desintegration de matieres cellulosiques |
CH654360A5 (de) * | 1981-12-10 | 1986-02-14 | Escher Wyss Gmbh | Verfahren zur aufloesung von altpapier im dickstoffbereich. |
DE3522395C1 (de) * | 1985-06-22 | 1986-11-20 | J.M. Voith Gmbh, 7920 Heidenheim | Verfahren und Anordnung zur Aufarbeitung von Altpapier |
FR2585385B1 (fr) * | 1985-07-26 | 1987-10-30 | Lamort E & M | Procede et appareillage de preparation et triage primaire de pate a papier |
US5538597A (en) * | 1990-09-05 | 1996-07-23 | A. Ahlstrom Corporation | Apparatus for the discharge of a mass tower |
-
2001
- 2001-11-15 DE DE10156201A patent/DE10156201C1/de not_active Expired - Fee Related
-
2002
- 2002-10-02 EP EP02022093A patent/EP1312712B1/de not_active Expired - Lifetime
- 2002-10-02 AT AT02022093T patent/ATE346183T1/de not_active IP Right Cessation
- 2002-10-02 DE DE50208763T patent/DE50208763D1/de not_active Expired - Fee Related
- 2002-11-13 US US10/292,468 patent/US6986829B2/en not_active Expired - Fee Related
- 2002-11-14 JP JP2002331146A patent/JP2003193390A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0323749A2 (de) * | 1988-01-05 | 1989-07-12 | A. Ahlstrom Corporation | Verfahren und Mittel um die Entleerung eines Fallrohrs oder dergleichen zu erleichtern und die Behandlung von Pulpe im besagten Fass |
US5407538A (en) * | 1990-07-02 | 1995-04-18 | E & M Lamort | Device for separating a mixture of paper pulp and contaminants |
EP0475669B1 (de) * | 1990-09-05 | 1995-11-29 | A. Ahlstrom Corporation | Massenturm und Vorrichtung zum dessen Ablassen |
DE19826879A1 (de) * | 1998-06-17 | 1999-12-30 | Voith Sulzer Papiertech Patent | Verfahren und Behälter zum Stapeln von hochkonsistentem Papierfaserstoff |
Also Published As
Publication number | Publication date |
---|---|
US6986829B2 (en) | 2006-01-17 |
DE10156201C1 (de) | 2002-10-17 |
EP1312712B1 (de) | 2006-11-22 |
ATE346183T1 (de) | 2006-12-15 |
DE50208763D1 (de) | 2007-01-04 |
JP2003193390A (ja) | 2003-07-09 |
EP1312712A3 (de) | 2004-01-02 |
US20030089471A1 (en) | 2003-05-15 |
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