DE102012213642A1 - Screening apparatus for wet sieving of fibrous material suspensions, used for pulper used in pulp and paper industry, has wear strip detachably attached to support bar and/or respective ring segment, to limit sides of outlet channel - Google Patents
Screening apparatus for wet sieving of fibrous material suspensions, used for pulper used in pulp and paper industry, has wear strip detachably attached to support bar and/or respective ring segment, to limit sides of outlet channel Download PDFInfo
- Publication number
- DE102012213642A1 DE102012213642A1 DE102012213642.8A DE102012213642A DE102012213642A1 DE 102012213642 A1 DE102012213642 A1 DE 102012213642A1 DE 102012213642 A DE102012213642 A DE 102012213642A DE 102012213642 A1 DE102012213642 A1 DE 102012213642A1
- Authority
- DE
- Germany
- Prior art keywords
- rotor
- sieve
- ring segments
- wear strip
- support bar
- 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- Withdrawn
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
- B05B9/085—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump
- B05B9/0855—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being motor-driven
- B05B9/0861—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being motor-driven the motor being electric
-
- 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
-
- 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
- D21D5/02—Straining or screening the pulp
- D21D5/16—Cylinders and plates for screens
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
- H04M1/6041—Portable telephones adapted for handsfree use
- H04M1/6075—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle
- H04M1/6083—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle by interfacing with the vehicle audio system
- H04M1/6091—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle by interfacing with the vehicle audio system including a wireless interface
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Paper (AREA)
Abstract
Description
Die Erfindung betrifft eine Siebvorrichtung zur Nasssiebung von Faserstoffsuspensionen mit einem, eine Vielzahl von Sieböffnungen aufweisenden Sieb und einem auf der Zulaufseite des Siebes angeordneten Rotor, wobei das Sieb aus mehreren, um den Rotor herum angeordneten Ringsegmenten zusammengesetzt ist, die sich an den in und entgegen der Rotationsrichtung liegenden Seiten auf der Ablaufseite des Siebes auf radial jeweils zwischen zwei benachbarten Ringsegmenten verlaufenden Stützleisten abstützen, wobei zwischen zwei benachbarten Ringsegmenten und der jeweiligen Stützleiste ein zum Rotor offener und radial verlaufender Abführkanal gebildet wird. The invention relates to a sieve for wet sieving pulp suspensions with a sieve having a plurality of sieve openings and a rotor arranged on the feed side of the sieve, the sieve being composed of a plurality of annular segments arranged around the rotor, which are adjacent to and in front of the rotor The sides lying on the discharge side of the screen are supported on support strips running radially between two adjacent ring segments, wherein a discharge channel open to the rotor and radially extending between two adjacent ring segments and the respective support strip is formed.
Solche Siebvorrichtungen werden mit Vorteil bei Stofflösern in Stoffaufbereitungsanlagen zur Bildung von Faserstoffsuspensionen in der Zellstoff und Papierindustrie eingesetzt. Dabei sollen faserfremde Verunreinigungen sowie noch nicht aufgelöste Faserstoffe auf Grund ihrer Größe am Sieb zurückgehalten und abgeschieden werden. Die aufgelösten Fasern können dabei zusammen mit einem Teil des Wassers die Sieböffnungen passieren. Die Charakteristik eines solchen Siebes ergibt sich im Wesentlichen aus Größe, Form und Anzahl der sich darin befindlichen Sieböffnungen.Such screening devices are advantageously used in pulpers in stock preparation plants to form pulp suspensions in the pulp and paper industry. Due to their size, non-fibrous impurities as well as undissolved fibers should be retained on the sieve and separated. The dissolved fibers can pass through the screen openings together with part of the water. The characteristic of such a sieve results essentially from the size, shape and number of sieve openings therein.
Um ein Verstopfen der Sieböffnungen zu verhindern, wird auf der Zulaufseite dicht vor dem Sieb ein Rotor zur Erzeugung von hydraulischen Druck- und Saugimpulsen angeordnet. Außerdem werden beim Überstreichen der Abführkanäle zwischen den Ringsegmenten grobe Verunreinigungen vom Rotor abgeschält und radial nach außen geführt. Dies wirkt einem Verstopfen des meist sehr geringen Spaltes zwischen Rotor und Sieb entgegen. Da insbesondere die Ringsegmente einer hohen Belastung ausgesetzt sind, müssen diese relativ oft ausgewechselt werden, was entsprechend teuer ist.In order to prevent clogging of the screen openings, a rotor for generating hydraulic pressure and suction pulses is arranged on the inlet side just before the screen. In addition, coarse impurities are peeled off the rotor and passed radially outward when sweeping the discharge channels between the ring segments. This counteracts clogging of the usually very small gap between rotor and sieve. Since in particular the ring segments are exposed to a high load, they must be replaced relatively often, which is correspondingly expensive.
Die Aufgabe der Erfindung ist es daher die Einsatzdauer der Ringsegmente bei möglichst umfassender Gewährleistung ihrer Funktion zu verlängern.The object of the invention is therefore to extend the service life of the ring segments with the widest possible guarantee of their function.
Erfindungsgemäß wurde die Aufgabe dadurch gelöst, dass sich an die entgegen der Rotationsrichtung liegende Seite eines Ringsegmentes eine radial verlaufenden Verschleißleiste anschließt, die lösbar auf der Stützleiste und/oder am jeweiligen Ringsegment befestigt ist und eine Seite des Abführkanals begrenzt. Hierbei wurde erkannt, dass die auf der entgegen der Rotationsrichtung liegende und den Abführkanal begrenzende Seite des Ringsegmentes einem sehr hohen Verschleiß ausgesetzt ist. Die hohe Belastung ergibt sich durch das Zusammenwirken zwischen dem Abführkanal den am Rotor haftenden Störstoffen und den damit verbundenen Scherkräften. Um die Einsatzdauer der Ringsegmente zu verlängern wird deren am schnellsten verschleißender Bereich nunmehr von einer Verschleißleiste gebildet, die entsprechend verschleißfester ausgebildet sein kann. Ein Austausch der Verschleißleisten ist wesentlich einfacher und billiger.According to the invention the object is achieved in that adjoins the opposite side of the rotational direction of a ring segment, a radially extending wear strip, which is releasably secured to the support bar and / or the respective ring segment and limits one side of the discharge channel. In this case, it was recognized that the side of the ring segment which lies opposite to the direction of rotation and which delimits the discharge channel is exposed to very high wear. The high load results from the interaction between the discharge channel adhering to the rotor impurities and the associated shear forces. In order to extend the service life of the ring segments whose fastest-wearing area is now formed by a wear strip, which may be formed corresponding wear-resistant. Replacing the wear strips is much easier and cheaper.
Um die Ablösung von Störstoffen vom Rotor beim Überstreichen der Abführkanäle zu verbessern, sollte die Verschleißleiste auf dem, dem Rotor und dem Abführkanal zugewandten Bereich eine radial verlaufende Scher-Kante aufweisen. Mit Vorteil sollte diese Scher-Kante recht- oder spitzwinklig ausgebildet sein.In order to improve the separation of contaminants from the rotor when sweeping the discharge channels, the wear strip on the, the rotor and the discharge channel facing region should have a radially extending shear edge. Advantageously, this shear edge should be formed rectangular or acute-angled.
Des Weiteren kann es vorteilhaft sein, wenn die Verschleißleiste einen viereckigen Querschnitt besitzt. Falls gegenüberliegende Seiten gleich oder spiegelverkehrt ausgebildet sind, so kann nach einem zu starken Verschleiß insbesondere der Scherkante die Verschleißleiste gelöst und in einem zweiten, vorzugsweise gewendeten Zustand wieder zum Einsatz gebracht werden. Dies bietet die Möglichkeit die Einsatzdauer der Verschleißleiste zu verdoppeln. Furthermore, it may be advantageous if the wear strip has a quadrangular cross-section. If opposite sides are the same or mirror-inverted, then the wear strip can be released after excessive wear, in particular the shearing edge, and returned to use in a second, preferably reversed state. This offers the possibility to double the service life of the wear strip.
Besonders geeignet ist diese Lösung, wenn die Sieböffnungen als Löcher ausgebildet sind, deren Durchmesser zwischen 4 und 10 mm, vorzugsweise zwischen 6 und 8 mm liegt und/oder der Spalt zwischen Rotor und Sieb eine Breite zwischen 0,5 und 2 mm, vorzugsweise zwischen 0,5 und 1,5 mm hat. Dies begründet sich insbesondere wegen der erhöhten Gefahr einer Verstopfung.This solution is particularly suitable when the screen openings are formed as holes whose diameter is between 4 and 10 mm, preferably between 6 and 8 mm and / or the gap between the rotor and screen width between 0.5 and 2 mm, preferably between 0.5 and 1.5 mm. This is due in particular to the increased risk of constipation.
Um die Siebvorrichtung möglichst stabil auszubilden, sollten sich auch die radial innen und außen verlaufenden Seiten der Ringsegmente auf ihrer Ablaufseite auf in Umfangsrichtung verlaufenden Stützleisten abstützen.In order to form the screening device as stable as possible, the radially inwardly and outwardly extending sides of the ring segments should also be supported on their discharge side on circumferentially extending support strips.
Nachfolgend soll die Erfindung an einem Ausführungsbeispiel eines Stofflösers zur Herstellung einer Faserstoffsuspension, wie sie zur Herstellung einer Papierbahn benötigt wird, näher erläutert werden. In der beigefügten Zeichnung zeigt:The invention will be explained in more detail on an embodiment of a pulper for producing a pulp suspension, as required for producing a paper web. In the attached drawing shows:
Das ringförmige Sieb setzt sich, wie in
Die Ringsegmente
Dabei stützen sich die Ränder der Ringsegmente
Dies führt zu einem hohen Verschleiß dieser Wand. Daher wird diese Wand des Abführkanals
Claims (7)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202012012678U DE202012012678U1 (en) | 2012-08-02 | 2012-08-02 | screening device |
DE102012213642.8A DE102012213642A1 (en) | 2012-08-02 | 2012-08-02 | Screening apparatus for wet sieving of fibrous material suspensions, used for pulper used in pulp and paper industry, has wear strip detachably attached to support bar and/or respective ring segment, to limit sides of outlet channel |
ATGM50108/2013U AT13827U1 (en) | 2012-08-02 | 2013-08-01 | screening device |
CN201320647963.1U CN203530763U (en) | 2012-08-02 | 2013-08-02 | Screening device used for fiber material suspension wet-type screening |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012213642.8A DE102012213642A1 (en) | 2012-08-02 | 2012-08-02 | Screening apparatus for wet sieving of fibrous material suspensions, used for pulper used in pulp and paper industry, has wear strip detachably attached to support bar and/or respective ring segment, to limit sides of outlet channel |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102012213642A1 true DE102012213642A1 (en) | 2014-02-06 |
Family
ID=49943996
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE202012012678U Expired - Lifetime DE202012012678U1 (en) | 2012-08-02 | 2012-08-02 | screening device |
DE102012213642.8A Withdrawn DE102012213642A1 (en) | 2012-08-02 | 2012-08-02 | Screening apparatus for wet sieving of fibrous material suspensions, used for pulper used in pulp and paper industry, has wear strip detachably attached to support bar and/or respective ring segment, to limit sides of outlet channel |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE202012012678U Expired - Lifetime DE202012012678U1 (en) | 2012-08-02 | 2012-08-02 | screening device |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN203530763U (en) |
AT (1) | AT13827U1 (en) |
DE (2) | DE202012012678U1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102023116982A1 (en) | 2022-06-30 | 2024-01-04 | Voith Patent Gmbh | Strips for a sieve, in particular for a sieve in fiber preparation, and method for assembling the same |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3001869A1 (en) * | 1980-01-19 | 1981-07-23 | J.M. Voith Gmbh, 7920 Heidenheim | Fibre suspension sorting - uses a slitted sieve with structure slit arrangement |
DE3821453A1 (en) * | 1987-07-03 | 1989-01-12 | Kamyr Ab | Screening apparatus for separating off cellulose fibres from a suspension liquid stream and for introducing the particles into another liquid stream under superatmospheric pressure |
DE19620051A1 (en) * | 1996-05-18 | 1997-11-20 | Voith Sulzer Stoffaufbereitung | Device for sorting fibrous suspension |
DE4392040C1 (en) * | 1992-05-15 | 1999-04-15 | Andritz Patentverwaltung | Device for separating liquids from fiber suspensions and use of the device |
DE10065930A1 (en) * | 2000-12-22 | 2002-07-04 | Voith Paper Patent Gmbh | Production of a sieve, for sorting a wet paper fiber suspension, has grooves at the upper surface to take narrower inserted bars, to be secured by screw fasteners through them into the lower support frame |
DE102006014234A1 (en) * | 2005-10-19 | 2007-04-26 | Voith Patent Gmbh | Screening device for wet screening of paper fiber suspension has screen plate pre-stressed to exert compressive forces on middle support ring, and tensile forces on both inner and outer support rings |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19649764C2 (en) * | 1995-12-02 | 2000-11-30 | Ask High Technology Tech Entwi | Device for shredding material, in particular waste paper |
JP2005113301A (en) * | 2003-10-07 | 2005-04-28 | Aikawa Iron Works Co Ltd | Strainer for papermaking |
-
2012
- 2012-08-02 DE DE202012012678U patent/DE202012012678U1/en not_active Expired - Lifetime
- 2012-08-02 DE DE102012213642.8A patent/DE102012213642A1/en not_active Withdrawn
-
2013
- 2013-08-01 AT ATGM50108/2013U patent/AT13827U1/en not_active IP Right Cessation
- 2013-08-02 CN CN201320647963.1U patent/CN203530763U/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3001869A1 (en) * | 1980-01-19 | 1981-07-23 | J.M. Voith Gmbh, 7920 Heidenheim | Fibre suspension sorting - uses a slitted sieve with structure slit arrangement |
DE3821453A1 (en) * | 1987-07-03 | 1989-01-12 | Kamyr Ab | Screening apparatus for separating off cellulose fibres from a suspension liquid stream and for introducing the particles into another liquid stream under superatmospheric pressure |
DE4392040C1 (en) * | 1992-05-15 | 1999-04-15 | Andritz Patentverwaltung | Device for separating liquids from fiber suspensions and use of the device |
DE19620051A1 (en) * | 1996-05-18 | 1997-11-20 | Voith Sulzer Stoffaufbereitung | Device for sorting fibrous suspension |
DE10065930A1 (en) * | 2000-12-22 | 2002-07-04 | Voith Paper Patent Gmbh | Production of a sieve, for sorting a wet paper fiber suspension, has grooves at the upper surface to take narrower inserted bars, to be secured by screw fasteners through them into the lower support frame |
DE102006014234A1 (en) * | 2005-10-19 | 2007-04-26 | Voith Patent Gmbh | Screening device for wet screening of paper fiber suspension has screen plate pre-stressed to exert compressive forces on middle support ring, and tensile forces on both inner and outer support rings |
Also Published As
Publication number | Publication date |
---|---|
CN203530763U (en) | 2014-04-09 |
AT13827U1 (en) | 2014-09-15 |
DE202012012678U1 (en) | 2013-08-22 |
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R138 | Derivation of utility model |
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Effective date: 20150303 |