EP2238291A1 - Pulper for pulverizing and suspending paper material - Google Patents
Pulper for pulverizing and suspending paper materialInfo
- Publication number
- EP2238291A1 EP2238291A1 EP08870961A EP08870961A EP2238291A1 EP 2238291 A1 EP2238291 A1 EP 2238291A1 EP 08870961 A EP08870961 A EP 08870961A EP 08870961 A EP08870961 A EP 08870961A EP 2238291 A1 EP2238291 A1 EP 2238291A1
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title abstract description 8
- 238000010298 pulverizing process Methods 0.000 title abstract 2
- 230000004888 barrier function Effects 0.000 claims abstract description 28
- 239000000725 suspension Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000013459 approach Methods 0.000 claims 1
- 238000004090 dissolution Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 230000002349 favourable effect Effects 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
- 239000000126 substance Substances 0.000 description 2
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 1
- 229920001131 Pulp (paper) Polymers 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
- 238000009434 installation Methods 0.000 description 1
- 238000002156 mixing Methods 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
- 230000007306 turnover Effects 0.000 description 1
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.
- Pulpers of this type are mainly used to suspend air-dry pulp or waste paper.
- the registered material is intensively mixed in large pieces, webs or pressed bales with water, which is usually a mixing and crushing rotor is 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.
- the standard type for a pulper is a vertical cylindrical tank with a concentric rotor in the floor area.
- water and the material to be dissolved is added from above and generated with the help of the rotor Trombenströmung in the suspension, ie in the central region of the fabric is sucked down from the rotor and pressed radially outward in the bottom region, resulting in a Umtriebsströmung results.
- the circumferential flow braked as this often brings only a small contribution to the resolution.
- 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.
- Figure 1 Schematically a section through a pulper according to the invention, side view;
- FIG. 1 Pulper of Figure 1, top view.
- Figure 3 a variant in side view
- FIG. 4 top view of a flow barrier
- FIG. 5 section through a flow barrier
- FIG. 6 shows another possible form of the flow barrier
- FIG. 7 pulper with double conical bottom
- FIG. 8 A flow barrier inclined in the direction of movement.
- the pulper of Fig. 1 drawn in side elevation is a typical form of the invention.
- 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 there is a substantially vertical flow barrier 8. 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.
- 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 dissolution effect of the pulper is small.
- 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 may, as shown here, pass through a screen plate 6 into a chamber 10 (e.g., an annular channel) and be discharged 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 around 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 shows the pulper of Fig. 1 in top view.
- the holes of the screen plate 6 are not shown. you recognizes that only a single flow ungsbarriere 8 is present with the dimensions already indicated.
- the pulper shown in Fig. 3 differs from that of Fig. 1 essentially in that the flow barrier 8 'is provided with a front side 4 ' , which is inclined relative 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 where 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
- 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.
- 5 shows a section through the flow barrier 8 ' on the line V in FIG. 3.
- flow barriers may also be used, e.g. with semicircular or partially elliptical cross sections, as shown by way of example in FIG.
- fig. 8 may also be an inclination of the flow barrier in the circumferential direction, preferably in the direction of rotation of the rotor 2, be advantageous, ie the upper
- An inventive pulper (of the type shown in Fig. 3) may be provided with the following dimensions, for example.
- 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 rectangular angle profile 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)
Abstract
Description
Claims
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 true EP2238291A1 (en) | 2010-10-13 |
EP2238291B1 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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103981748A (en) * | 2014-06-11 | 2014-08-13 | 浙江华川实业集团有限公司 | Efficient hydrapulper for papermaking and operating method thereof |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 EP EP08870961.3A patent/EP2238291B1/en active Active
- 2008-12-12 CN CN200880124943.8A patent/CN101910508B/en active Active
- 2008-12-12 WO PCT/EP2008/010558 patent/WO2009089878A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2009089878A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103981748A (en) * | 2014-06-11 | 2014-08-13 | 浙江华川实业集团有限公司 | Efficient hydrapulper for papermaking and operating method thereof |
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 |
Also Published As
Publication number | Publication date |
---|---|
CN101910508B (en) | 2013-04-17 |
CN101910508A (en) | 2010-12-08 |
DE202008000684U1 (en) | 2009-05-20 |
WO2009089878A1 (en) | 2009-07-23 |
EP2238291B1 (en) | 2016-07-06 |
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