EP1609904A1 - Pulpeur secondaire pour la préparation de pâte - Google Patents

Pulpeur secondaire pour la préparation de pâte Download PDF

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Publication number
EP1609904A1
EP1609904A1 EP05009274A EP05009274A EP1609904A1 EP 1609904 A1 EP1609904 A1 EP 1609904A1 EP 05009274 A EP05009274 A EP 05009274A EP 05009274 A EP05009274 A EP 05009274A EP 1609904 A1 EP1609904 A1 EP 1609904A1
Authority
EP
European Patent Office
Prior art keywords
rotor
sekundärstofflöser
rotor blades
sieve
screen
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Withdrawn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
EP05009274A
Other languages
German (de)
English (en)
Inventor
Wolfgang Mueller
Roland Reinhold
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 EP1609904A1 publication Critical patent/EP1609904A1/fr
Withdrawn legal-status Critical Current

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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 Sekundärstofflöser according to the preamble of claim 1.
  • the pulper results in a suspension that is pumpable or diluted to pumpability and which contains a relatively high proportion of impurities. It is therefore in many cases in one Secondary pulper of the type considered here further processed.
  • a secondary solubilizer will also referred to as a fiberizer.
  • the separating effect of the sieve causes the suspension within the Sekundärstofflösers enriched with impurities.
  • the contaminant-enriched content of the Sekundärstofösösers on a downstream sorting device e.g. a sieve drum or a Balancer, emptied.
  • the Sekundärstofflöser has essentially the task of coming from the pulper Further dissolve paper fiber suspension, so further shred the softened pieces of paper and to excrete at least some of the coarse impurities.
  • the secondary pulper is operated in the closed system, i. that he has no free surface for supplying the paper pulp to be dissolved.
  • the acting as a resolving rotor unfolds its effect together with the sieve, on the surface of which it is moved close by and that in certain cases can also be provided with attached strips.
  • This value usually lies the specific work transferred in the range of more than 10 kWh / to, often also over 20 kWh / to, this value, of course, depends on the nature of the stock to be processed and the therein dependent impurities is dependent.
  • the invention is based on the object to improve the known Sekundärstofflöser so that They can get along without disadvantages with a lower energy consumption.
  • the secondary pulper according to the invention with a flat energy-saving rotor equipped.
  • the features described in claim 1 cause the rotor to keep the strainer optimally free and at the same time achieve the desired resolving power Has effect.
  • Known rotors cause a considerable turnover in the housing of the Secondary pulper. This is advantageous if an increase in pressure is desired. on the other hand but this increases the energy consumption, can lead to higher wear and the formation of Spinning lead. This energy consuming circulation of the pulp suspension is the low secondary agent according to the invention.
  • a comparative experiment with a known rotor has shown that the specific work, based on the amount of solids at the accepts opening, with the subject invention about halves.
  • the known rotor used had at the outer edge of the six rotor blades about the same maximum thickness as the new rotor, but this decreased on the radial path inside up to 2.5 times, measured at a radial distance from the outer edge, the a quarter of the rotor outer diameter corresponded.
  • FIGS. 1 and 2 show in two views the rotor 4 designed according to the invention and the wire 5, with which the rotor 4 cooperates.
  • the plan view of Fig. 2 shows one with three Rotor blades 3 provided rotor 4 and the underlying sieve 5.
  • the sieve 5 is provided with a Variety of screen openings 10 provided, but which are shown only in FIG. 1.
  • In the radial Exterior 19 of the rotor blade 3 is measured perpendicular to the wire 5 thickness A of Rotor blade 3 relatively low. In the case shown here, it is about 4% of the Outside diameter D of the rotor 4.
  • the radial outer region 19 extends (with the small thickness A) over a relatively large part of the rotor blade, ie from the outer edge of the rotor.
  • the radial length L of this outer region 19 is then slightly smaller than half Outer diameter D of the rotor 4. In other cases, the radial length L may be even smaller but not smaller than a quarter of the outer diameter D of the rotor 4.
  • the thickness A of the rotor blade 3, as viewed in the circumferential direction of the rotor 4, may be profiled, e.g. to produce a desired hydraulic effect.
  • the thickness A in tightly tolerate radial direction, e.g. provide a maximum tolerance of 10% or they to keep constant.
  • the rotor 4 may be constructed so that the rotor blades 3 are mounted on a central part 2.
  • the front edge 9 of the rotor blades 3 is substantially rectilinear and closes tangentially to the middle part 2.
  • the straight front edge 9 has the suspension less than a curved edge and promotes the dissolution of the pulp, especially at low thickness A of the Rotor blades 3.
  • the leading edges 9 of the rotor blades 3 may be provided with wear protection edges 15, e.g. With welded hard metal strips, be provided.
  • the rotor 4 can be particularly economical produce when middle part 2 and rotor blades 3 are cut out of a plate. In this case In the central area would be a hub 17 for receiving the drive shaft 11 (Fig. 3) to be fastened.
  • these structural details are to be understood as a typical example only.
  • On the Sieve 5 processing strips 16 are attached (shown in Fig. 2 only two), by the resolution and Siebratien be improved.
  • the secondary pulper shown in Fig. 3 has for the pulp suspension S a central inlet 6 in the housing 14.
  • the rotor 4 keeps the sieve 5 of blockages and dissolves the added Pulp suspension S continues on.
  • the part of the suspension that has passed through the sieve 5 leaves the housing 14 through the Acceptance opening 7, while the rejected by the Rejektabiser. 8 is discharged.
  • the Sekundärstofflöser is equipped with a rotor 4, as he e.g. is shown in Fig. 1 and Fig. 2.
  • the invention can also be on a Sekundärstofflöser be realized whose sieve 5 'has the shape of a truncated cone, as shown in FIGS. 4 shows.
  • the rotor of this shape is adapted by the rotor blades 3 ' have the same or at least a similar cone angle ⁇ .
  • This special form of Secondary solubilizers may be more expensive to manufacture due to the conical shape of the sieve but heavy parts can be easily thrown off the area of the screen 5 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
EP05009274A 2004-06-25 2005-04-28 Pulpeur secondaire pour la préparation de pâte Withdrawn EP1609904A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200420010009 DE202004010009U1 (de) 2004-06-25 2004-06-25 Sekundärstofflöser für die Papierstoffaufbereitung
DE202004010009U 2004-06-25

Publications (1)

Publication Number Publication Date
EP1609904A1 true EP1609904A1 (fr) 2005-12-28

Family

ID=33039631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05009274A Withdrawn EP1609904A1 (fr) 2004-06-25 2005-04-28 Pulpeur secondaire pour la préparation de pâte

Country Status (2)

Country Link
EP (1) EP1609904A1 (fr)
DE (1) DE202004010009U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017052391A1 (fr) * 2015-09-23 2017-03-30 Pe Beskidy Społka Z O.O. Społka Komandytowa Procédé de fractionnement de stock de vieux papiers au cours du défibrage et traitement séparé des fractions
WO2019206530A1 (fr) * 2018-04-23 2019-10-31 Voith Patent Gmbh Désintégrateur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873410A (en) * 1973-08-27 1975-03-25 Black Clawson Co Method and apparatus for recovering paper fibers from waste paper containing materials
US3945576A (en) * 1973-09-11 1976-03-23 Escher Wyss Gmbh Stock pulper
US5407538A (en) * 1990-07-02 1995-04-18 E & M Lamort Device for separating a mixture of paper pulp and contaminants
US6010012A (en) * 1997-11-03 2000-01-04 Beloit Technologies, Inc. Fluidizing detrashing impeller
EP1059381A1 (fr) * 1999-06-09 2000-12-13 Voith Sulzer Papiertechnik Patent GmbH Rotor pour un pulpeur et un élément protecteur contre l' usure d'un tel rotor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873410A (en) * 1973-08-27 1975-03-25 Black Clawson Co Method and apparatus for recovering paper fibers from waste paper containing materials
US3945576A (en) * 1973-09-11 1976-03-23 Escher Wyss Gmbh Stock pulper
US5407538A (en) * 1990-07-02 1995-04-18 E & M Lamort Device for separating a mixture of paper pulp and contaminants
US6010012A (en) * 1997-11-03 2000-01-04 Beloit Technologies, Inc. Fluidizing detrashing impeller
EP1059381A1 (fr) * 1999-06-09 2000-12-13 Voith Sulzer Papiertechnik Patent GmbH Rotor pour un pulpeur et un élément protecteur contre l' usure d'un tel rotor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017052391A1 (fr) * 2015-09-23 2017-03-30 Pe Beskidy Społka Z O.O. Społka Komandytowa Procédé de fractionnement de stock de vieux papiers au cours du défibrage et traitement séparé des fractions
WO2019206530A1 (fr) * 2018-04-23 2019-10-31 Voith Patent Gmbh Désintégrateur
CN112004967A (zh) * 2018-04-23 2020-11-27 福伊特专利有限公司 碎浆机
CN112004967B (zh) * 2018-04-23 2022-12-09 福伊特专利有限公司 碎浆机
US12012694B2 (en) 2018-04-23 2024-06-18 Voith Patent Gmbh Pulper for circulating a fibrous stock suspension

Also Published As

Publication number Publication date
DE202004010009U1 (de) 2004-09-23

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