[go: up one dir, main page]

EP1586439B1 - screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions - Google Patents

screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions Download PDF

Info

Publication number
EP1586439B1
EP1586439B1 EP04008962.5A EP04008962A EP1586439B1 EP 1586439 B1 EP1586439 B1 EP 1586439B1 EP 04008962 A EP04008962 A EP 04008962A EP 1586439 B1 EP1586439 B1 EP 1586439B1
Authority
EP
European Patent Office
Prior art keywords
counter
screw press
press according
drum
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.)
Expired - Lifetime
Application number
EP04008962.5A
Other languages
German (de)
French (fr)
Other versions
EP1586439A1 (en
Inventor
Peter Dipl.-Ing.Dr. Scheucher
Rudolf Ing. Stadlauer
Dietmar Hausjell
Rupert Ing. Brunnsteiner
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.)
Andritz AG
Original Assignee
Andritz AG
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 Andritz AG filed Critical Andritz AG
Priority to EP04008962.5A priority Critical patent/EP1586439B1/en
Publication of EP1586439A1 publication Critical patent/EP1586439A1/en
Application granted granted Critical
Publication of EP1586439B1 publication Critical patent/EP1586439B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/18—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing with means for adjusting the outlet for the solid

Definitions

  • the invention relates to a screw press for separating liquid from solid-liquid mixtures, in particular pulp suspensions, with a jacket provided with liquid passages and a worm shaft arranged in this, between which an annular gap is formed, through which the solid-liquid mixture is pressed.
  • the counter-pressure device has a counter-pressure surface whose radius decreases in the conveying direction of the solid-liquid mixture
  • the counter-pressure device is displaceable in the axial direction of the worm shaft and connected to pressure cylinders and the worm shaft is a drum and at least one auger mounted on the drum, the drum having at the discharge end of the annulus a discharge area for the at least partially liquid-free solid-liquid mixture has, whose diameter tapers in the conveying direction in the region of the counter-pressure device, the diameter of the outlet region in the region of the counter-pressure device in the conveying direction in the form of a truncated cone tapers and a thrust bearing of the worm shaft is arranged at the outlet end of the worm shaft and the jacket over a surrounding the outlet region Outlet box, which essentially has the same diameter as the jacket, connects to the transmission of axial forces with the worm shaft.
  • the counter-pressure device serves to generate at the end of the annular gap a backflow of the already largely freed from liquid solid-liquid mixture, so that the pressure in the annular gap is further increased and squeeze out even more liquid from the solid-liquid mixture.
  • the largely liquid-free solid-liquid mixture must be deflected so that it can be carried away.
  • the AT 398090 B this deflection takes place radially outward, wherein the box surrounding this outlet area is correspondingly large, but in any case substantially larger than the jacket, since in the outlet box not only the counter-pressure device, but also the space for the discharge of the largely liquid-freed solid-liquid Mixture must be created.
  • This is not only disadvantageous because of the increased space requirement, but also brings problems in terms of design with it, since the relatively large outlet box has a deteriorated stiffness, which must be compensated again by a correspondingly reinforced construction.
  • the US 4,665,816 describes a method and a device for controlling a fruit press.
  • the drum of the screw press is cylindrical up to its end.
  • the shows GB 1,127,934 a similar device, in which case additionally the displaceability of the counter-pressure device is missing, which is indispensable for adaptation to different conditions of the (fiber) material to be drained.
  • the DE 26 41 597 describes a spindle screw press with a vertical axis. Here special precautions must be taken in the area of the worm shaft end and the foundations in order to absorb the weight and the axial forces.
  • the invention is therefore based on the object to provide a screw press, in which the space requirement is reduced in the outlet area and the stiffness problem of the outlet box is improved, which subsequently reduced and the outlet box can be constructed technically less expensive.
  • the counter-pressure device has a counterpressure surface whose radius decreases as seen in the conveying direction of the solid-liquid mixture, the substantially liquid-free solid-liquid mixture is deflected radially inwards. As a result, there is no additional space outside the counter-pressure device for discharging the largely liquid-free solid-liquid mixture, whereby the outlet box can be correspondingly reduced in size.
  • the already mentioned stiffness problem of the outlet box can be improved.
  • a large outlet box resulting in the transmission of axial forces large axial displacements between the worm shaft and provided with liquid passages coat (high-pressure strainer basket) or outlet box due to bending of the vertical walls of the outlet box, which must be built very rigid. Therefore, the thrust bearing is also often given to the inlet side, whereby the force is indeed long but straight and no bending stress from vertical walls.
  • the high-pressure screen baskets usually have to bend their feet.
  • the thrust bearing of the worm shaft is disposed at the outlet end of the worm shaft and the jacket over a the Outlet area surrounding outlet box, which has substantially the same diameter as the jacket, connects to transmit axial forces with the worm shaft.
  • the outlet box may be a tube which is not substantially larger than the shell or high pressure strainer basket.
  • Fig. 1 a first embodiment of the invention
  • Fig. 2 an end view of the screw press of Fig. 1
  • Fig. 3 a second embodiment of the invention
  • Fig. 4 shows a further embodiment of the invention.
  • FIG. 1 and 2 the outlet side of a first embodiment of the invention is shown.
  • the inlet side not shown, as usual in the art and, for example, as in the AT 398090 B be shown represented.
  • the worm press according to the invention has, as far as is of importance for the understanding of the present invention, a worm shaft 1 with a drum 2 and a mounted on this single or multi-turn Schecken Maisl 3, within a sieve-like shell 4 with openings for the passage of liquid is rotatably mounted.
  • an annular gap 5 is formed, through which a solid-liquid mixture, in particular a pulp suspension, is conveyed, the liquid is pressed by the gradually narrowing annular gap 5 in the direction of the counter-pressure surface 8 of the counter-pressure device 7.
  • the liquid contained in the pulp suspension is continuously pressed out and exits through the openings in the jacket 4.
  • the largely dehydrated pulp suspension is redirected to the counter-pressure surface 8 and guided radially inwardly in the gap 14. Subsequently, the pulp suspension is discharged through a shaft 15.
  • the stub shaft 13 is as in Fig. 1 to be seen, mounted on a spherical roller bearing 16 on the frame 10 of the outlet box 9, wherein the end wall 17 of the outlet box 9 is connected via a substantially tubular wall 18 with the jacket 4. Since in the invention the material diversion takes place at the end of the annular gap 5 inwards, the wall 18 of the outlet box 9 can have approximately the same diameter as the casing 4, but in any case a smaller diameter than in the prior art with a material diversion to the outside, which is advantageous from a constructive point of view.
  • the front wall 17 and the frame 10 of the outlet box 9 can be made smaller and more compact, so that in this area, the load and mechanical deformation due to the introduction of force from the worm shaft 1 via the bearing 16 in the outlet box 9 and further into the jacket 4 can be significantly reduced.
  • Fig. 3 is a largely the Fig. 1 corresponding embodiment of the invention shown in which, however, the wall of the truncated cone 12a is broken in the outlet region, so that even in this area still squeezed liquid can be removed.
  • a sleeve 19 adjoining the truncated cone 12a is provided, the interior 20 of which is in open connection with the interior 21 of the truncated cone 12a. The liquid can then flow on the side facing away from the truncated cone 12 a side through a line 22.
  • Fig. 4 shows a further embodiment of the invention, wherein between Drum outer jacket 23 and shaft journals 13 are preferably welded to transmit power two conical annular ribs 24.
  • Radial ribs 26 are tightly welded between the conical annular surface 24 located in front of the corrugated sieve 25 and the conical annular surface 24a attached to the corrugated sieve 25, which can also be designed as a circular ring, and to which the sleeve 19 adjoins, so that cells 27 are created lift the filtrate entering through the corrugated screen 25 upwards, from where it can then reach the drainage pipe 22 between the sleeve 19 and the pin 13. Thus, a further drainage and a controlled removal of the liquid can be achieved.
  • a bolt 28 is welded to the drum outer casing 23 in the direction of rotation after the end of the screw flight 3 (or in the case of multi-start screws to the ends of the individual screw flights), which loosens the compacted cake.
  • the filter cake can thus be removed in the form of small chunks, whereby the risk of constipation is greatly reduced.
  • ribs 29 are welded axially and radially at a certain angle, whereby they promote the loosened fabric inwards and towards the outlet. The substance falls behind the annular gap through the outlet shaft 15 from the screw press.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Description

Die Erfindung betrifft eine Schneckenpresse zum Abtrennen von Flüssigkeit aus Feststoff-Flüssigkeits-Gemischen, insbesondere Faserstoffsuspensionen, mit einem mit Flüssigkeitsdurchtritten versehenen Mantel und einer in diesem angeordneten Schneckenwelle, zwischen denen ein Ringspalt gebildet wird, durch welchen das Feststoff-Flüssigkeits-Gemisch gepresst wird, und mit einer Gegendruckeinrichtung im Bereich des Austrittsendes des Ringspaltes, wobei die Gegendruckeinrichtung eine Gegendruckfläche aufweist, deren Radius sich in Förderrichtung des Feststoff-Flüssigkeits-Gemisches gesehen verringert, wobei die Gegendruckeinrichtung in Achsrichtung der Schneckenwelle verschiebbar und mit Druckzylindern verbunden ist und die Schneckenwelle eine Trommel und wenigstens eine auf der Trommel angebrachte Schneckenwendel aufweist, wobei die Trommel am Austrittsende des Ringspaltes einen Auslaufbereich für das wenigstens teilweise von Flüssigkeit befreite Feststoff-Flüssigkeits-Gemisch aufweist, dessen Durchmesser sich im Bereich der Gegendruckeinrichtung in Förderrichtung verjüngt, wobei sich der Durchmesser des Auslaufbereiches im Bereich der Gegendruckeinrichtung in Förderrichtung in Form eines Kegelstumpfes verjüngt und ein Axiallager der Schneckenwelle am auslaufseitigen Ende der Schneckenwelle angeordnet ist und den Mantel über einen den Auslaufbereich umgebenden Auslaufkasten, der im wesentliche den gleichen Durchmesser wie der Mantel aufweist, zur Übertragung von Axialkräften mit der Schneckenwelle verbindet.The invention relates to a screw press for separating liquid from solid-liquid mixtures, in particular pulp suspensions, with a jacket provided with liquid passages and a worm shaft arranged in this, between which an annular gap is formed, through which the solid-liquid mixture is pressed. and with a counter-pressure device in the region of the outlet end of the annular gap, wherein the counter-pressure device has a counter-pressure surface whose radius decreases in the conveying direction of the solid-liquid mixture, wherein the counter-pressure device is displaceable in the axial direction of the worm shaft and connected to pressure cylinders and the worm shaft is a drum and at least one auger mounted on the drum, the drum having at the discharge end of the annulus a discharge area for the at least partially liquid-free solid-liquid mixture has, whose diameter tapers in the conveying direction in the region of the counter-pressure device, the diameter of the outlet region in the region of the counter-pressure device in the conveying direction in the form of a truncated cone tapers and a thrust bearing of the worm shaft is arranged at the outlet end of the worm shaft and the jacket over a surrounding the outlet region Outlet box, which essentially has the same diameter as the jacket, connects to the transmission of axial forces with the worm shaft.

Die Gegendruckeinrichtung dient dazu, am Ende des Ringspaltes einen Rückstau des bereits weitgehend von Flüssigkeit befreiten Feststoff-Flüssigkeits-Gemisches zu erzeugen, damit der Druck im Ringspalt weiter erhöht wird und noch mehr Flüssigkeit aus dem Feststoff-Flüssigkeits-Gemisch auszupressen. Im Bereich der Gegendruckeinrichtung bzw. im Anschluss daran muss das weitgehend von Flüssigkeit befreite Feststoff-Flüssigkeits-Gemisch umgelenkt werden, damit es abgefördert werden kann.The counter-pressure device serves to generate at the end of the annular gap a backflow of the already largely freed from liquid solid-liquid mixture, so that the pressure in the annular gap is further increased and squeeze out even more liquid from the solid-liquid mixture. In the area of the counter-pressure device or subsequently, the largely liquid-free solid-liquid mixture must be deflected so that it can be carried away.

Im Stand der Technik, beispielsweise der AT 398090 B erfolgt diese Umlenkung radial nach außen, wobei der diesen Auslaufbereich umgebende Kasten entsprechend groß, jedenfalls aber wesentlich größer als der Mantel ausgeführt ist, da im Auslaufkasten nicht nur die Gegendruckeinrichtung, sondern auch der Raum für das Ableiten des weitgehend von Flüssigkeit befreiten Feststoff-Flüssigkeits-Gemisches geschaffen werden muss. Dies ist nicht nur wegen des erhöhten Raumbedarfes nachteilig, sondern bringt auch Probleme in konstruktiver Hinsicht mit sich, da der relativ große Auslaufkasten eine verschlechterte Steifigkeit aufweist, die wieder durch eine entsprechend verstärkte Konstruktion ausgeglichen werden muss. Die US 4,665,816 beschreibt ein Verfahren und eine Vorrichtung zur Regelung einer Fruchtpresse. Die Trommel der Schneckenpresse ist bis zu ihrem Ende zylindrisch aufgebaut. Weiters zeigt die GB 1,127,934 eine ähnliche Vorrichtung, wobei hier zusätzlich die Verschiebbarkeit der Gegendruckeinrichtung fehlt, die für eine Anpassung an unterschiedliche Bedingungen des zu entwässernden (Faser-) Stoffes unabdingbar ist. Die DE 26 41 597 beschreibt eine Spindelschneckenpresse mit einer vertikalen Achse. Hier sind besondere Vorkehrungen im Bereich des Schneckenwellenendes und der Fundamente zu treffen, um das Gewicht und die Axialkräfte aufzunehmen. Der Erfindung liegt daher die Aufgabe zu Grunde, eine Schneckenpresse zu schaffen, bei der der Raumbedarf im Auslaufbereich verringert und das Steifigkeitsproblem des Auslaufkastens verbessert wird, wodurch in weiterer Folge auch der Auslaufkasten verkleinert und technisch weniger aufwendig konstruiert werden kann.In the prior art, for example, the AT 398090 B this deflection takes place radially outward, wherein the box surrounding this outlet area is correspondingly large, but in any case substantially larger than the jacket, since in the outlet box not only the counter-pressure device, but also the space for the discharge of the largely liquid-freed solid-liquid Mixture must be created. This is not only disadvantageous because of the increased space requirement, but also brings problems in terms of design with it, since the relatively large outlet box has a deteriorated stiffness, which must be compensated again by a correspondingly reinforced construction. The US 4,665,816 describes a method and a device for controlling a fruit press. The drum of the screw press is cylindrical up to its end. Furthermore, the shows GB 1,127,934 a similar device, in which case additionally the displaceability of the counter-pressure device is missing, which is indispensable for adaptation to different conditions of the (fiber) material to be drained. The DE 26 41 597 describes a spindle screw press with a vertical axis. Here special precautions must be taken in the area of the worm shaft end and the foundations in order to absorb the weight and the axial forces. The invention is therefore based on the object to provide a screw press, in which the space requirement is reduced in the outlet area and the stiffness problem of the outlet box is improved, which subsequently reduced and the outlet box can be constructed technically less expensive.

Gelöst wird diese Aufgabe mit einer Schneckenpresse mit den Merkmalen des Anspruches 1.This problem is solved with a screw press with the features of claim 1.

Durch den Umstand, dass die Gegendruckeinrichtung eine Gegendruckfläche aufweist, deren Radius sich in Förderrichtung des Feststoff-Flüssigkeits-Gemisches gesehen verringert, wird das weitgehend von Flüssigkeit befreite Feststoff-Flüssigkeits-Gemisch radial nach innen umgelenkt. Dadurch besteht radial außerhalb der Gegendruckeinrichtung kein zusätzlicher Raumbedarf für das Ableiten des weitgehend von Flüssigkeit befreiten Feststoff-Flüssigkeits-Gemisches, wodurch der Auslaufkasten entsprechend verkleinert werden kann.Due to the fact that the counter-pressure device has a counterpressure surface whose radius decreases as seen in the conveying direction of the solid-liquid mixture, the substantially liquid-free solid-liquid mixture is deflected radially inwards. As a result, there is no additional space outside the counter-pressure device for discharging the largely liquid-free solid-liquid mixture, whereby the outlet box can be correspondingly reduced in size.

Durch die Erfindung kann auch das bereits angesprochene Steifigkeitsproblem des Auslaufkastens verbessert werden. Bei einem großen Auslaufkasten ergeben sich bei der Übertragung der Axialkräfte große axiale Verschiebungen zwischen der Schneckenwelle und dem mit Flüssigkeitsdurchtritten versehenen Mantel (Hochdruck-Siebkorb) bzw. Auslaufkasten infolge Biegung der senkrechten Wände des Auslaufkastens, wodurch dieser sehr steif gebaut werden muss. Deshalb wird das Axiallager auch häufig auf die Einlaufseite gegeben, wodurch der Kraftweg zwar lange aber geradlinig ist und keine Biegebeanspruchung von senkrechten Wänden erfolgt. Dies hat allerdings wieder den Nachteil, dass der Fixpunkt auf der Einlaufseite ist und bei langen Pressen der hochbelastete Auslaufkasten wegen der Wärmedehnung (bis 10 mm) mit Gleitsteinen befestigt werden muss. Bei den Hochdruck-Siebkörben müssen sich meist die Füße biegen.By the invention, the already mentioned stiffness problem of the outlet box can be improved. In a large outlet box resulting in the transmission of axial forces large axial displacements between the worm shaft and provided with liquid passages coat (high-pressure strainer basket) or outlet box due to bending of the vertical walls of the outlet box, which must be built very rigid. Therefore, the thrust bearing is also often given to the inlet side, whereby the force is indeed long but straight and no bending stress from vertical walls. However, this again has the disadvantage that the fixed point is on the inlet side and in long presses the highly loaded outlet box because of the thermal expansion (up to 10 mm) must be fixed with sliding blocks. The high-pressure screen baskets usually have to bend their feet.

Erfindungsgemäß ist daher zur Lösung des Steifigkeitsproblems vorgesehen, dass das Axiallager der Schneckenwelle am auslaufseitigen Ende der Schneckenwelle angeordnet ist und den Mantel über einen den Auslaufbereich umgebenden Auslaufkasten, der im wesentlichen den gleichen Durchmesser wie der Mantel aufweist, zur Übertragung von Axialkräften mit der Schneckenwelle verbindet.According to the invention is therefore provided to solve the stiffness problem that the thrust bearing of the worm shaft is disposed at the outlet end of the worm shaft and the jacket over a the Outlet area surrounding outlet box, which has substantially the same diameter as the jacket, connects to transmit axial forces with the worm shaft.

Bei dieser Ausführungsform der Erfindung kann der Auslaufkasten ein Rohr sein, das nicht wesentlich größer als der Mantel bzw. Hochdruck-Siebkorb ist. Dadurch ist der Kraftweg zum Axiallager auf der Auslaufseite geradlinig und kurz (ohne Biegeelemente) und die wenig belastete Einlaufseite kann sich frei dehnen.In this embodiment of the invention, the outlet box may be a tube which is not substantially larger than the shell or high pressure strainer basket. As a result, the force path to the thrust bearing on the outlet side is straight and short (without bending elements) and the slightly loaded inlet side can stretch freely.

Weitere bevorzugte Ausführungsformen der Erfindung sind Gegenstand der übrigen Unteransprüche.Further preferred embodiments of the invention are the subject of the remaining dependent claims.

Nachfolgend werden bevorzugte Ausführungsformen der Erfindung unter Bezugnahme auf die beiliegenden Zeichnungen beschrieben in welche Fig. 1 eine erste Ausführungsform der Erfindung, Fig. 2 eine Stirnansicht auf die Schneckenpresse von Fig. 1, Fig. 3 eine zweite Ausführungsform der Erfindung und Fig. 4 eine weitere Ausführungsform der Erfindung zeigt.Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings in which: Fig. 1 a first embodiment of the invention, Fig. 2 an end view of the screw press of Fig. 1 . Fig. 3 a second embodiment of the invention and Fig. 4 shows a further embodiment of the invention.

In den Fig. 1 und 2 ist die Auslaufseite einer ersten Ausführungsform der Erfindung dargestellt. Die nicht dargestellte Einlaufseite kann wie im Stand der Technik üblich und beispielsweise wie in der AT 398090 B dargestellt ausgeführt sein.In the Fig. 1 and 2 the outlet side of a first embodiment of the invention is shown. The inlet side, not shown, as usual in the art and, for example, as in the AT 398090 B be shown represented.

Die erfindungsgemäße Schneckenpresse weist, soweit dies für das Verständnis der vorliegenden Erfindung von Bedeutung ist, eine Schneckenwelle 1 mit einer Trommel 2 und einer auf dieser angebrachten ein- oder mehrgängigen Scheckenwendel 3 auf, die innerhalb eines siebartigen Mantels 4 mit Durchbrechungen für den Durchtritt von Flüssigkeit drehbar gelagert ist. Zwischen der Trommel 2 und dem Mantel 4 wird ein Ringspalt 5 gebildet, durch den ein Feststoff-Flüssigkeits-Gemisch, insbesondere eine Faserstoffsuspension, gefördert wird, der Flüssigkeit durch den sich allmählich verengenden Ringspalt 5 in Richtung auf die Gegendruckfläche 8 der Gegendruckeinrichtung 7 gepresst. Dadurch wird die in der Faserstoffsuspension enthaltene Flüssigkeit kontinuierlich ausgepresst und tritt durch die Durchbrechungen im Mantel 4 aus. Am Austrittsende 6 des Ringspaltes 5 wird die weitgehend entwässerte Faserstoffsuspension an der Gegendruckfläche 8 umgeleitet und im Spalt 14 radial nach innen geführt. Anschließend wird die Faserstoffsuspension durch einen Schacht 15 ausgetragen.The worm press according to the invention has, as far as is of importance for the understanding of the present invention, a worm shaft 1 with a drum 2 and a mounted on this single or multi-turn Scheckenwendel 3, within a sieve-like shell 4 with openings for the passage of liquid is rotatably mounted. Between the drum 2 and the shell 4, an annular gap 5 is formed, through which a solid-liquid mixture, in particular a pulp suspension, is conveyed, the liquid is pressed by the gradually narrowing annular gap 5 in the direction of the counter-pressure surface 8 of the counter-pressure device 7. As a result, the liquid contained in the pulp suspension is continuously pressed out and exits through the openings in the jacket 4. At the outlet end 6 of the annular gap 5, the largely dehydrated pulp suspension is redirected to the counter-pressure surface 8 and guided radially inwardly in the gap 14. Subsequently, the pulp suspension is discharged through a shaft 15.

Der Wellenstummel 13 ist, wie in Fig. 1 zu sehen, über ein Pendelrollenlager 16 am Rahmen 10 des Auslaufkastens 9 gelagert, wobei die Stirnwand 17 des Auslaufkastens 9 über eine im wesentlichen rohrförmige Wand 18 mit dem Mantel 4 verbunden ist. Da bei der Erfindung die Stoffumleitung am Ende des Ringspaltes 5 nach innen erfolgt, kann die Wand 18 des Auslaufkastens 9 etwa den gleichen Durchmesser wie der Mantel 4, in jedem Fall aber einen kleineren Durchmesser als beim Stand der Technik mit einer Stoffumleitung nach außen aufweisen, was aus konstruktiver Sicht vorteilhaft ist. Gleichermaßen kann auch die Stirnwand 17 bzw. der Rahmen 10 des Auslaufkastens 9 kleiner und kompakter gebaut werden, sodass auch in diesem Bereich die Belastung und mechanische Deformation infolge der Krafteinleitung von der Schneckenwelle 1 über das Lager 16 in den Auslaufkasten 9 und weiter in den Mantel 4 wesentlich verringert werden kann.The stub shaft 13 is as in Fig. 1 to be seen, mounted on a spherical roller bearing 16 on the frame 10 of the outlet box 9, wherein the end wall 17 of the outlet box 9 is connected via a substantially tubular wall 18 with the jacket 4. Since in the invention the material diversion takes place at the end of the annular gap 5 inwards, the wall 18 of the outlet box 9 can have approximately the same diameter as the casing 4, but in any case a smaller diameter than in the prior art with a material diversion to the outside, which is advantageous from a constructive point of view. Similarly, the front wall 17 and the frame 10 of the outlet box 9 can be made smaller and more compact, so that in this area, the load and mechanical deformation due to the introduction of force from the worm shaft 1 via the bearing 16 in the outlet box 9 and further into the jacket 4 can be significantly reduced.

In Fig. 3 ist eine weitgehend der Fig. 1 entsprechende Ausführungsform der Erfindung dargestellt, bei der allerdings die Wand des Kegelstumpfes 12a im Auslaufbereich durchbrochen ist, damit auch in diesem Bereich noch ausgepresste Flüssigkeit abgeführt werden kann. Zum Ableiten der ausgepressten Flüssigkeit ist eine an den Kegelstumpf 12a anschließenden Hülse 19 vorgesehen, deren Innenraum 20 mit dem Innenraum 21 des Kegelstumpfes 12a in offener Verbindung steht. Die Flüssigkeit kann dann weiter auf der dem Kegelstumpf 12a abgewandten Seite durch eine Leitung 22 abfließen.
Fig. 4 zeigt eine weitere Ausführungsform der Erfindung, wobei zwischen Trommelaußenmantel 23 und Wellenzapfen 13 zur Kraftübertragung zwei vorzugsweise kegelförmige Kreisringrippen 24 eingeschweißt sind. Zwischen der vor dem Wellensieb 25 liegenden Kegelringfläche 24 und der nach dem Wellensieb 25 angebrachten Kegelringfläche 24a, die auch als Kreisring ausgeführt sein kann, und an die sich die Hülse 19 anschließt, sind radiale Rippen 26 dicht eingeschweißt, so dass Zellen 27 entstehen, welche das durch das Wellensieb 25 eintretende Filtrat nach oben heben, von wo es dann zwischen Hülse 19 und Zapfen 13 zum Abflussrohr 22 gelangen kann. Damit kann eine weitere Entwässerung und eine kontrollierte Abfuhr der Flüssigkeit erreicht werden. Nach dem Wellensieb 25 ist am Trommelaußenmantel 23 in Drehrichtung nach dem Ende der Schneckenwendel 3 (bzw. bei mehrgängigen Schnecken nach den Enden der einzelnen Schneckenwendeln) ein Bolzen 28 aufgeschweißt, welcher den verdichteten Kuchen auflockert. Der Filterkuchen kann somit in Form von kleinen Brocken abgeführt werden, wodurch auch die Gefahr einer Verstopfung stark reduziert wird. Auf dem letzten Kegelmantel 24a sind Rippen 29 axial und radial in einem bestimmten Winkel angeschweißt, wodurch diese den aufgelockerten Stoff nach innen und zum Auslauf hin fördern. Der Stoff fällt hinter dem Ringspalt durch den Auslaufschacht 15 aus der Schneckenpresse.In Fig. 3 is a largely the Fig. 1 corresponding embodiment of the invention shown in which, however, the wall of the truncated cone 12a is broken in the outlet region, so that even in this area still squeezed liquid can be removed. For deriving the pressed-out liquid, a sleeve 19 adjoining the truncated cone 12a is provided, the interior 20 of which is in open connection with the interior 21 of the truncated cone 12a. The liquid can then flow on the side facing away from the truncated cone 12 a side through a line 22.
Fig. 4 shows a further embodiment of the invention, wherein between Drum outer jacket 23 and shaft journals 13 are preferably welded to transmit power two conical annular ribs 24. Radial ribs 26 are tightly welded between the conical annular surface 24 located in front of the corrugated sieve 25 and the conical annular surface 24a attached to the corrugated sieve 25, which can also be designed as a circular ring, and to which the sleeve 19 adjoins, so that cells 27 are created lift the filtrate entering through the corrugated screen 25 upwards, from where it can then reach the drainage pipe 22 between the sleeve 19 and the pin 13. Thus, a further drainage and a controlled removal of the liquid can be achieved. After the corrugated sieve 25, a bolt 28 is welded to the drum outer casing 23 in the direction of rotation after the end of the screw flight 3 (or in the case of multi-start screws to the ends of the individual screw flights), which loosens the compacted cake. The filter cake can thus be removed in the form of small chunks, whereby the risk of constipation is greatly reduced. On the last cone shell 24a ribs 29 are welded axially and radially at a certain angle, whereby they promote the loosened fabric inwards and towards the outlet. The substance falls behind the annular gap through the outlet shaft 15 from the screw press.

Claims (11)

  1. Screw press for removing liquid from solid-liquid mixtures, particularly pulp suspensions, with a shell (4) having liquid passages and a screw shaft (1) disposed inside between which an annular gap (5) is formed through which the solid-liquid mixture is pressed, and with a counter-pressure device (7) in the area of the outlet end (6) of the annular gap (5), where the counter-pressure device (7) has a counter-pressure surface (8) with a decreasing radius in the flow direction of the solid-liquid mixture, where the counter-pressure device (7) can be moved in the axial direction of the screw shaft (1) and is connected to pressure cylinders, and where the screw shaft (1) has a drum (2), where the drum (2) has an outlet area (12, 12a, 14) at the outlet end (6) of the annular gap (5) for the solid-liquid mixture that has been at least partly freed of liquid, the diameter of which outlet area narrows in flow direction in the area of the counter-pressure device (7), where the diameter of the outlet area (12, 12a, 14) narrows in flow direction in the shape of a truncated cone (12) in the area of the counter-pressure device (7), a gap (14) diminishing in size in radial direction, but whose cross-sectional area increases in the direction of flow, is formed between the counter-pressure surface (8) of the counter-pressure device (7) and the truncated cone (12) of the screw shaft (1), and an axial bearing (16) of the screw shaft (1) is arranged at the outlet end of the screw shaft (1), where the screw shaft (1) has a drum (2) and at least one screw flight (3) attached to the drum (2) and the axial bearing (16) connects the shell (4) to the screw shaft (1) via an outlet box (9) surrounding the outlet area and with largely the same diameter as the shell (4) in order to transfer axial forces, where the smallest diameter of the counter-pressure surface (8) is smaller than the outer diameter of the drum (2) at the outlet end (6) of the annular gap (5).
  2. Screw press according to Claim 1, characterized in that the drum (2) has a shaft screen (25) in the end section to allow liquid to pass through.
  3. Screw press according to Claim 1 or 2, characterized in that circular surfaces (24, 24a) are provided in the end section of the drum (2) between the outer shell of the drum (23) and the screw shaft (1).
  4. Screw press according to Claim 3, characterized in that the circular surfaces (24, 24a) advantageously have a conical shape and ribs (29) are mounted on the outer circular surface (24a).
  5. Screw press according to one of Claims 1 to 4, characterized in that the pressure cylinders are hydraulic cylinders.
  6. Screw press according to one of Claims 1 to 4, characterized in that the pressure cylinders are pneumatic cylinders.
  7. Screw press according to one of Claims 1 to 6, characterized in that the counter-pressure surface (8) narrows largely in a conical shape.
  8. Screw press according to one of Claims 1 to 7, characterized in that the counter-pressure device (7) has a closed counter-pressure surface (8).
  9. Screw press according to one of Claims 1 to 8, characterized in that the circular surfaces (24) are provided with ribs (26) that form cells (27) together with the circular surfaces (24, 24a).
  10. Screw press according to one of Claims 1 to 9, characterized in that a sleeve (19), which is connected advantageously to the cells (27), is disposed around the shaft end (13).
  11. Screw press according to Claim 10, characterized in that the sleeve (19) is connected to a discharge pipe (22).
EP04008962.5A 2004-04-15 2004-04-15 screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions Expired - Lifetime EP1586439B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04008962.5A EP1586439B1 (en) 2004-04-15 2004-04-15 screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04008962.5A EP1586439B1 (en) 2004-04-15 2004-04-15 screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions

Publications (2)

Publication Number Publication Date
EP1586439A1 EP1586439A1 (en) 2005-10-19
EP1586439B1 true EP1586439B1 (en) 2016-07-27

Family

ID=34924606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04008962.5A Expired - Lifetime EP1586439B1 (en) 2004-04-15 2004-04-15 screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions

Country Status (1)

Country Link
EP (1) EP1586439B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008012156A1 (en) 2008-03-01 2009-09-03 Karl-Heinz Tetzlaff Screw conveyor for feeding biomass into a pressure vessel
TWI465376B (en) * 2009-08-06 2014-12-21 Karl-Heinz Tetzlaff Conveyor screw for feeding biomass into a pressure container
DE102010029826A1 (en) 2010-06-09 2011-12-15 Voith Patent Gmbh Screw extruder for separation of liquid out of suspension, preferably slurry or fibrous material, comprises screw shaft, which is rotated in cylindrical shell and presses suspension through annular gap from inlet opening to outlet opening
AT519379B1 (en) 2016-11-30 2020-02-15 Derflinger Sen Franz Device for the continuous squeezing of liquid from a suspension
CN110405984B (en) * 2019-08-30 2024-06-07 陕西龙宾立德新材料科技有限公司 Glass fiber reinforced plastic separation device and method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT3980B (en) 1899-06-28 1901-04-25 Paul Jun Bredt
DE472285C (en) 1928-03-27 1929-02-25 Emil Neufeldt Horizontal press for schnitzel
FR735101A (en) 1932-03-22 1932-11-03 Krupp Fried Grusonwerk Ag Screw press for materials containing liquids
GB1127934A (en) 1965-10-04 1968-09-18 Mtk Ingenioers Ab Fa Improvements in or relating to de-watering devices
DE2641597A1 (en) 1976-09-16 1978-03-30 Selwig & Lange Maschf Worm press for fibrous materials - has sieve jacket with interrupted worm blades driven in opposite directions
US4665816A (en) 1986-03-24 1987-05-19 Brown International Corporation Method and apparatus for automatically controlling juice finishing machine
AT398090B (en) * 1992-05-15 1994-09-26 Andritz Patentverwaltung DEVICE FOR SEPARATING LIQUID FROM SOLIDS-LIQUID MIXTURES WITH A SOLIDS RETENTION DEVICE AND DEVICE IN THE FORM OF A SCREW PRESS

Also Published As

Publication number Publication date
EP1586439A1 (en) 2005-10-19

Similar Documents

Publication Publication Date Title
DE4392041C1 (en) Screw press
EP1992894B1 (en) Device for removing water from bulk or flowable feed material through its compaction
EP2155353B1 (en) Press screw separator
DE2616643A1 (en) METHOD AND DEVICE FOR DRAINING MOVING SUSPENSIONS
EP3829742A1 (en) Separator for wastewater treatment with movable screen body
EP2766177B1 (en) Screw press
WO2018137731A1 (en) Stirring mill
DE1252175B (en) Screw filter press for the continuous dewatering of a pulp made of wood fibers or mixtures of sewage sludge and fibers
EP1586439B1 (en) screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions
AT515482B1 (en) screw Press
DE202010001759U1 (en) screw press
AT412857B (en) SCREW PRESSURE FOR REMOVING LIQUID FROM SOLID-LIQUID MIXTURES, ESPECIALLY FIBER-SUSPENSIONS
AT518015B1 (en) Screw press and method for maintaining the same
EP0565824A1 (en) Press for dewatering substances through compression
DE69809210T2 (en) SCREEN DEVICE WITH MEANS TO LIMIT THE WASTE FLOW
DE69821656T2 (en) screening device
EP2780158B1 (en) Screw press ii
DE1003151B (en) Device for expressing liquid from liquid-containing material
DE102011086615A1 (en) Screw extruder for separating liquids from suspension, particularly sludge- or fiber suspension, has casing having radially inner filter and radially outer supporting body, which is made of multiple axially spaced ring segments
EP2315620A1 (en) Pressure worm separator having a hollow worm shaft
DE102013021037A1 (en) Preßschneckenseparator with device and method for safe comminution of Feststoffpfropfen at the outlet of the spring-operated double flaps. The support bearing of the worm shaft located behind the device is thus permanently protected against the ingress of abrasive particles.
WO2014037181A1 (en) Screw extruder
DE102011086619A1 (en) Worm extruder for separating liquids from suspension e.g. fibrous material suspension, has casing including radially inner sieve and radially outer supporting body, where axially aligned support rings are formed in supporting body
EP0408875B1 (en) Straining cylinder for screening a watery suspension
DE10315587A1 (en) Separating apparatus for separating solids from highly viscous fluids, includes sieve having separating ranges that separate solids from highly viscous fluids supplied by double barreled auger which is driven by motor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20060112

AKX Designation fees paid

Designated state(s): AT BE BG

RBV Designated contracting states (corrected)

Designated state(s): DE FI SE

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

17Q First examination report despatched

Effective date: 20080613

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160406

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FI SE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502004015262

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502004015262

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20170502

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20230420

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20230420

Year of fee payment: 20

Ref country code: FI

Payment date: 20230419

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 502004015262

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG