EP2238291B1 - Pulper for pulverizing and suspending paper material - Google Patents
Pulper for pulverizing and suspending paper material Download PDFInfo
- Publication number
- EP2238291B1 EP2238291B1 EP08870961.3A EP08870961A EP2238291B1 EP 2238291 B1 EP2238291 B1 EP 2238291B1 EP 08870961 A EP08870961 A EP 08870961A EP 2238291 B1 EP2238291 B1 EP 2238291B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- pulper
- pulper according
- flow barrier
- rotor
- 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.)
- Active
Links
- 238000010298 pulverizing process Methods 0.000 title claims 2
- 239000000463 material Substances 0.000 title description 5
- 230000004888 barrier function Effects 0.000 claims description 26
- 239000000725 suspension Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229920001131 Pulp (paper) Polymers 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Images
Classifications
-
- 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
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
Definitions
- the invention relates to a pulper for comminution and suspension of pulp according to the preamble of claim 1 and as from EP 1 731 663 A1 known.
- Pulpers of this type are mainly used to suspend air-dry pulp or waste paper.
- the registered material is intensively mixed with water in large pieces, sheets or pressed bales, for which a mixing and crushing rotor is usually used.
- a pulper consists essentially of a container for the suspension and the already mentioned rotor. In many cases, it also contains a sieve in the bottom area, through which the suspension can be pumped.
- Flow installations on the container wall are, for example, in the US2002 / 166910 A1 , of the DE 33 04 958 A1 as well as the EP-A-0 122 991 described.
- the invention is based on the object to improve the known pulper without significant overhead, possibly in the form of a conversion of an existing pulper, in particular, the collection of the material to be improved.
- the pulper should be able to dissolve faster and / or more economically.
- the cut in side view drawn pulper the Fig. 1 is a typical form of the prior art.
- the pulp S is fed into a container 1 together with water W.
- a mixture of water and pulp which is already partially crushed.
- This thus provided with coarse and fine solids suspension is displaced by the rotor 2 arranged centrally in the bottom region of the container 1 in drive.
- the rotor is driven by a motor, not shown.
- Essential for this pulper according to the invention is that on the inside of the side wall 5 of the container 1 is a substantially vertical Flow barrier 8 is located. This extends with a maximum radial projection F into the trough, which amounts to at least 6%, preferably at least 15%, of the diameter D1 of the container 1.
- the flow barrier can be formed as a rectangular angle profile which extends perpendicularly from the bottom 7 of the container 1 to above the suspension mirror 9 forming during operation.
- the front 4 of this profile is rounded.
- the suspension is thus pulled down by the rotor 2, so that approximately along the center line 3 of the rotor 2, a downward flow is formed.
- the suspension is conveyed radially outwardly at the bottom 7 of the container 1 and thereby reaches its side wall 5. Overall, this results in a circulation flow. It is advantageous if the center line 3 of the rotor 2 is vertical and aligned with the container 1. As is known, in this described dissolution process by hydraulic forces and by contact between the rotor 2 and pulp, the crushing and suspension of the pulp causes.
- Paper pulp pieces which have been sufficiently comminuted can, as shown here, pass through a sieve plate 6 into a chamber 10 (eg an annular channel) and be removed as a pulp suspension P.
- a pulper can be operated both continuously and discontinuously.
- the screen plate 6 is not essential.
- the usual consistency, ie the solids content in The suspension P is usually about 2 to 8%, preferably 4 to 7%. It is often possible by the invention, an advantageous increase in the consistency by about 1% in the resolution.
- FIG. 2 For further illustration shows the Fig. 2 the pulper of Fig. 1 in top view.
- the holes of the screen plate 6 are not shown. It can be seen that only a single flow barrier 8 with the dimensions already indicated is present.
- the in Fig. 3 The inventive pulper shown differs from that of Fig. 1 essentially in that the flow barrier 8 'is provided with a front side 4', which runs obliquely with respect to the vertical at an angle ⁇ , so that at the bottom 7 of the pulper the radial projection is smaller than in the upper region, at which the maximum radial projection F is located. This is above the level 11, with which the pulper is operated as intended.
- Another possibility is to give the bottom 7 'the shape of two concentric truncated cones 12 and 13 ( Fig. 7 ). In this case, the lower truncated cone 12 is flatter than the overlying truncated cone 13th
- a flow barrier 8 in the dimensions indicated causes a strong vertical shear component to be generated on its contour which deflects the suspension to the center of the container. This creates a very well-trained intake cone in the center of rotation of the trough, which has a very favorable effect on the collection of registered raw material. In this way, the power consumption of the drive is reduced, often can be set higher fuel density and / or even better resolution can be achieved. This effect can not be compared with that of conventional reinforcing profiles on the inner wall of a pulper whose radial extent amounts to only a few percent of the trough diameter. Their contribution to the dissolving effect of the pulper is small
- the flow barrier 8 ' is provided with a cover 9' which is inclined relative to the horizontal and which lies above the filling level 11, the inclination leading to the outflow of material.
- Fig. 5 shows a section through the flow barrier 8 'on the line V in Fig. 3 ,
- Fig. 8 can also be an inclination of the flow barrier in the circumferential direction, preferably in the direction of rotation of the rotor 2, be advantageous, so that the upper part of the flow barrier in the circumferential direction offset from the lower part (at the bottom of the pulper) is. This inclination can further improve the hydraulic properties.
- An inventive pulper (of the type, as in Fig. 3
- the rotor 2 has on its moving wings an outer diameter D2 of 1000 mm. He runs close to a flat annular sieve 6, the openings of which he keeps clear of blockages.
- the flow barrier 8 is mounted, in the form of a right angle WinKelpröfils which extends from the bottom 7 to about the upper edge of the container 1 and projects into the container.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Description
Die Erfindung betrifft einen Stofflöser zur Zerkleinerung und Suspendierung von Papierstoff gemäß dem Oberbegriff des Anspruchs 1 und wie aus
Stofflöser dieser Art werden hauptsächlich angewendet, um lufttrockenes Zellstoffmaterial oder Altpapier in Suspension zu bringen. Das eingetragene Material wird in großen Stücken, Bahnen oder gepressten Ballen mit Wasser intensiv vermischt, wozu in der Regel ein Misch-und Zerkteinerungsrotor eingesetzt wird. Ein Stofflöser besteht im Wesentlichen aus einem Behälter für die Suspension und dem schon genannten Rotor. In vielen Fällen enthält er auch ein Sieb im Bodenbereich, durch das die Suspension abgepumpt werden kann.Pulpers of this type are mainly used to suspend air-dry pulp or waste paper. The registered material is intensively mixed with water in large pieces, sheets or pressed bales, for which a mixing and crushing rotor is usually used. A pulper consists essentially of a container for the suspension and the already mentioned rotor. In many cases, it also contains a sieve in the bottom area, through which the suspension can be pumped.
Verständlicherweise werden solche Stofflöser ständig optimiert, wobei im Wesentlichen eine schnelle und kraftwirtschaftliche Auflösung angestrebt wird. Als Standardtyp für einen Stofflöser hat sich ein senkrecht stehender zylindrischer Behälter mit einem konzentrischen Rotor im Bodenbereich durchgesetzt In diesem Behälter wird Wasser und der aufzulösende Stoff von oben zugegeben und mit Hilfe des Rotors eine Trombenströmung in der Suspension erzeugt, bei der also im zentralen Bereich der Stoff vom Rotor nach unten angesaugt und im Bodenbereich radial nach außen gedrückt wird, wodurch sich eine Umtriebsströmung ergibt. Es sind auch Strömungsmaßnahmen bekannt, um diese Umfriebsströmung zu steuern. So wird z.B. durch mehrere Strömungseinbauten (Schikanen) an der Behälterwand die Umfangsströmung gebremst, da diese oft nur einen geringen Beitrag zur Auflösung bringt. Die Förderung des eigentlichen Umtriebs, d.h. der wiederholte Transport des aufzulösenden Stoffes in den Rotorbereicht bringt dagegen eine Verbesserung des Effektes. Auch wird angestrebt, den frisch eingetragenen Stoff möglichst schnell in die Suspension einzuziehen. Aus diesen Gründen ist auch schon viel Entwicklung an den Rotoren und Behältern der Stofflöser betrieben worden.Understandably, such pulpers are constantly being optimized, with the aim of achieving a fast and efficient dissolution. As a standard type for a pulper, a vertical cylindrical container with a concentric rotor in the bottom area has prevailed in this container water and the substance to be dissolved is added from above and generated by means of the rotor a Trombenströmung in the suspension, ie in the central region of the Material is sucked from the rotor down and pressed radially outward in the bottom region, resulting in a Umtriebsströmung. There are also flow measures known to control this Umfriebsströmung. Thus, for example, by several flow installations (baffles) on the vessel wall, the circumferential flow braked, as this often brings only a small contribution to the resolution. The promotion of the actual Umtriebs, ie the repeated transport of the substance to be dissolved in the Rotorbereicht, however, brings an improvement of the effect. It is also desirable to collect the freshly introduced substance as quickly as possible in the suspension. For these reasons, much development has been carried out on the rotors and containers of pulpers.
Strömungseinbauten an der Behälterwand werden beispielsweise in der
In der
Einen anderen Versuch, Stofflöser dieser Art zu verbessern, zeigt die
Zur Verbesserung des Umtriebes sind auch schon unkonvehtionelle Wege beschritten worden, wie z.B. gemäß
Der Erfindung liegt die Aufgabe zu Grunde, die bekannten Stofflöser ohne wesentlichen Mehraufwand, eventuell auch in Form eines Umbaus eines bereits existierenden Stofflösers zu verbessern, wobei insbesondere der Einzug des Materials verbessert werden soll. Der Stofflöser soll schneller und/oder wirtschaftlicher auflösen können.The invention is based on the object to improve the known pulper without significant overhead, possibly in the form of a conversion of an existing pulper, in particular, the collection of the material to be improved. The pulper should be able to dissolve faster and / or more economically.
Diese Aufgabe wird an einem im Oberbegriff des Anspruchs 1 beschriebenen Stofflöser durch die im Kennzeichen genannten Maßnahmen gelöst.This object is achieved on a pulper described in the preamble of
Es hat sich nämlich gezeigt, dass durch die besonderte Form des Behälters ein schnellerer Einzug des eingetragenen Papierstoffes und eine Verbesserung des Umtriebes möglich ist. Der gesamte Auflösevorgang läuft schneller ab, was eine bessere Maschinennutzung sowie eine Energieersparnis bewirkt. Der verbesserte Auflöseeffekt lässt sich durch die schnellere Abnahme des Stippengehaltes in der Fasersuspension feststellen. Dabei ist der geringe Aufwand für die erfindungsgemäßen Maßnahmen ein großer Vorteil. Es ist auch möglich, einen Stofflöser, der bereits am Ort seines Betriebes aufgestellt ist, nachträglich mit der Erfindung umzurüsten. Anders als z.B. bei dem aus der
Die Erfindung wird erläutert an Hand von Zeichnungen. Dabei zeigen:
- Figur 1:
- Schematisch einen Schnitt durch einen Stofflöser gemäb dem Stand der Technik,
- Figur 2:
- Stofflöser der
Fig. 1 , Ansicht von oben; - Figur 3:
- eine erfindungsgemäße Variante in Seitenansicht;
- Figur 4:
- Draufsicht auf eine Strömungsbarriere;
- Figur 5:
- Schnitt durch eine Strömungsbarriere;
- Figur 6:
- eine weitere mögliche Form der Strömungsbarriere;
- Figur 7:
- Stofflöser mit doppelkonischem Boden;
- Figur 8:
- Eine in Bewegungsrichtung geneigte Strömungsbarriere.
- FIG. 1:
- Schematically a section through a pulper gemäbäb the prior art,
- FIG. 2:
- Pulper the
Fig. 1 , View from above; - FIG. 3:
- a variant of the invention in side view;
- FIG. 4:
- Top view of a flow barrier;
- FIG. 5:
- Section through a flow barrier;
- FIG. 6:
- another possible form of flow barrier;
- FIG. 7:
- Pulper with double conical bottom;
- FIG. 8:
- A flow barrier inclined in the direction of movement.
Der geschnitten in Seitenansicht gezeichnete Stofflöser der
Die Suspension wird also vom Rotor 2 so nach unten gezogen, dass etwa längs der Mittellinie 3 des Rotors 2 eine abwärts gerichtete Strömung entsteht. In Folge der Pumpwirkung des Rotors wird die Suspension am Boden 7 des Behälters 1 radial nach außen gefördert und gelangt dadurch zu dessen Seitenwand 5. Insgesamt entsteht dadurch eine Zirkulationsströmung. Dabei ist es günstig, wenn die Mittellinie 3 des Rotors 2 senkrecht steht und mit der des Behälters 1 fluchtet. Wie an sich bekannt, wird bei diesem beschriebenen Auflösevorgang durch hydraulische Kräfte und durch Kontakt zwischen Rotor 2 und Papierstoff die Zerkleinerung und Suspendierung des Papierstoffs bewirkt. Papierstoffteile, die genügend zerkleinert sind, können - wie hier gezeigt - durch ein Siebblech 6 hindurch in eine Kammer 10 (z.B. einen Ringkanal) gelangen und als faserstoffhaltige Suspension P abgeführt werden. Ein solcher Stofflöser kann sowohl kontinuierlich als auch diskontinuierlich betrieben werden. Das Siebblech 6 ist nicht unbedingt erforderlich. Die übliche Konsistenz, also der Feststoffanteil in der Suspension P beträgt in der Regel um die 2 bis 8 %, vorzugsweise 4 bis 7%. Dabei ist durch die Erfindung oft eine vorteilhafte Anhebung der Konsistenz um ca. 1 % bei der Auflösung möglich.The suspension is thus pulled down by the
Zur weiteren Veranschaulichung zeigt die
Der in
Eine Strömungsbarriere 8 in den angegebenen Dimensionen führt dazu, dass an ihrer Kontur eine starke Vertikalschubkomponente erzeugt wird, die die Suspension zum Zentrum des Behälters umlenkt. Dadurch entsteht ein sehr gut ausgebildeter Einzugskegel im Rotationszentrum des Troges, welcher sich sehr günstig auf das Einziehen von eingetragenem Rohstoff auswirkt. Auf diese Weise reduziert sich der Energieverbrauch des Antriebs, oft kann eine höhere Betriebsstoffdichte eingestellt und/oder eine noch bessere Auflösung erreicht werden. Diese Wirkung ist nicht zu vergleichen mit der von üblichen Verstärkungsprofilen an der Innenwand eines Stofflösers, deren Radialerstreckung nur sehr wenige Prozent des Trogdurchmessers beträgt. Deren Beitrag zur Auflösewirkung des Stofftösers ist geringA
Die
Um die gewünschten hydraulischen Wirkungen zu erzielten, können auch anders gestaltete Strömuhgsbarrieren verwendet werden, z.B. mit halbrunden oder teilelliptischen Querschnitten, wie es als Beispiel die
Ein erfindungsgemäßer Stofflöser (von der Art, wie in
Claims (17)
- Pulper for pulverizing and suspending paper pulp (S), having an upwardly open container (1) in which the paper pulp (S) may be mixed with water (W), be comminuted, and suspended, such that a paper-pulp containing suspension (P) is formed, wherein the container (1) has a substantially cylindrical side wall (5), a driven rotor (2) for generating a circulation flow in the container (1) being located on the base of the container (1), and a vertical flow barrier (8, 8', 8") being inserted on the side wall (5) of the container (1), characterized in that the front side (4') of the flow barrier (8', 8") in relation to the vertical is disposed at an angle (δ) between 0 and 10°, the angle (δ) being aligned such that at least the major part of the front side (4') from the bottom to the top converges with the axis of the container (1).
- Pulper according to Claim 1,
characterized in that
only one flow barrier (8, 8', 8") having a maximum radial protrusion (F) which is at least 6%, preferably at least 15% of the diameter (D1) of the container (1) is present. - Pulper according to Claim 2,
characterized in that
the one flow barrier (8, 8', 8") is provided with a maximum radial protrusion (F) which is between 10% and 20% of the diameter (D1) of the container (1). - Pulper according to Claim 1, 2, or 3, characterized in that
the front side (4') of the flow barrier (8', 8") in relation to the vertical is disposed at an angle (δ) between 4 and 8°. - Pulper according to one of the preceding claims, characterized in that
the angle (δ) is aligned such that at least the major part of the front side from the bottom to the top diverges from the axis of the container (1). - Pulper according to one of the preceding claims, characterized in that
the height of the flow barrier (8, 8', 8") reaches beyond 80% of the filling level (11) set on the periphery of the container (1) in operation. - Pulper according to Claim 6,
characterized in that the height of the flow barrier (8, 8', 8") reaches at least up to the filling level (11) on the periphery of the container (1). - Pulper according to one of the preceding claims, characterized in that
the flow barrier (8') is composed of an angle profile, the legs of which are connected to the side wall (5). - Pulper according to Claim 8,
characterized in that
the profile has an opening angle (β) between 80° and 120°, preferably of 90°. - Pulper according to one of Claims 1 to 7, characterized in that
the flow barrier (8") is composed of a semi-round or oval profile. - Pulper according to one of the preceding claims, characterized in that
the flow barrier (8, 8', 8") at the top is closed off by an obliquely placed plate. - Pulper according to one of the preceding claims, characterized in that
the centreline (3) of the rotor (2) is vertical. - Pulper according to one of the preceding claims, characterized in that
the container (1) has a side wall (5), the centreline (3) of which is upright and is in alignment with that of the rotor (2). - Pulper according to one of the preceding claims, characterized in that
the diameter (D2) of the rotor (2) is between 20 and 40% of the diameter (D1) of the container (1). - Pulper according to one of the preceding claims, characterized in that
the ratio between the total height (H) and the diameter (D1) of the container (1) is between 0.8 and 1.2. - Pulper according to one of the preceding claims, characterized in that
the base (7), proceeding from the region of the rotor (2) to the side wall (5), rises at a base angle (α) which is between 15° and 60°, preferably is 30°. - Pulper according to one of Claims 1 to 15, characterized in that
the base (7') of the pulper, proceeding from the region of the rotor (2) to the side wall (5), is composed of at least two truncated cones, the lower truncated cone (12) being flatter than the truncated cone (13) lying thereabove.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200820000684 DE202008000684U1 (en) | 2008-01-17 | 2008-01-17 | Pulper for crushing and suspending pulp |
PCT/EP2008/010558 WO2009089878A1 (en) | 2008-01-17 | 2008-12-12 | Pulper for pulverizing and suspending paper material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2238291A1 EP2238291A1 (en) | 2010-10-13 |
EP2238291B1 true EP2238291B1 (en) | 2016-07-06 |
Family
ID=40481939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08870961.3A Active EP2238291B1 (en) | 2008-01-17 | 2008-12-12 | Pulper for pulverizing and suspending paper material |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2238291B1 (en) |
CN (1) | CN101910508B (en) |
DE (1) | DE202008000684U1 (en) |
WO (1) | WO2009089878A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103981748B (en) * | 2014-06-11 | 2016-08-24 | 浙江华川实业集团有限公司 | A kind of papermaking high-efficiency hydraulic pulper and method of work |
AT516085B1 (en) * | 2014-07-22 | 2016-08-15 | Pga Putz-Granitzer-Anlagenbau Ges M B H | Device for preparing material |
CN104372702B (en) * | 2014-12-15 | 2016-08-17 | 济南大学 | A kind of pulper of low-power consumption low noise |
CN105369662A (en) * | 2015-12-09 | 2016-03-02 | 黄蒋元 | High-concentration tapered triple-helix hydrapulper |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0122991A3 (en) * | 1982-08-12 | 1985-02-06 | The Black Clawson Company | Apparatus and method for pulping paper making stock at high consistencies |
DE3234702A1 (en) | 1982-09-18 | 1984-03-22 | Bbc Brown Boveri & Cie | Method for precharging the commutating capacitors in an invertor with interphase commutation |
DE3304958C2 (en) * | 1983-02-12 | 1986-10-23 | P.J.Wolff & Söhne GmbH Apparate- u. Maschinenbau, 5160 Düren | Device for dissolving fibrous materials in liquid |
DE3429514A1 (en) | 1984-08-10 | 1986-02-13 | J.M. Voith Gmbh, 7920 Heidenheim | Pulper |
FI72356C (en) | 1985-12-31 | 1987-05-11 | Yhtyneet Paperitehtaat Oy | Device for destruction of paper and cardboard. |
US6508422B2 (en) * | 2001-05-11 | 2003-01-21 | Voith Paper, Inc. | Pulper for a fiber stock preparation system |
FR2844532B1 (en) | 2002-09-12 | 2004-11-05 | Kadant Lamort | PAPER DESINTEGRATER |
DE102005026108A1 (en) | 2005-06-07 | 2006-12-14 | Voith Patent Gmbh | Pulper for crushing and suspending pulp |
-
2008
- 2008-01-17 DE DE200820000684 patent/DE202008000684U1/en not_active Expired - Lifetime
- 2008-12-12 CN CN200880124943.8A patent/CN101910508B/en active Active
- 2008-12-12 WO PCT/EP2008/010558 patent/WO2009089878A1/en active Application Filing
- 2008-12-12 EP EP08870961.3A patent/EP2238291B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP2238291A1 (en) | 2010-10-13 |
CN101910508B (en) | 2013-04-17 |
WO2009089878A1 (en) | 2009-07-23 |
DE202008000684U1 (en) | 2009-05-20 |
CN101910508A (en) | 2010-12-08 |
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