EP2766177B1 - Screw press - Google Patents
Screw press Download PDFInfo
- Publication number
- EP2766177B1 EP2766177B1 EP12768712.7A EP12768712A EP2766177B1 EP 2766177 B1 EP2766177 B1 EP 2766177B1 EP 12768712 A EP12768712 A EP 12768712A EP 2766177 B1 EP2766177 B1 EP 2766177B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw press
- pipe
- flight
- shaft
- tube
- 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.)
- Not-in-force
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
-
- 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
- B30B9/121—Screw constructions
-
- 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
- B30B9/122—Means preventing the material from turning with the screw or returning towards the feed hopper
-
- 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
- B30B9/16—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 operating with two or more screws or worms
- B30B9/166—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 operating with two or more screws or worms the screws being coaxially disposed in the same chamber
Definitions
- the invention relates to a screw press with a shaft and helical coil mounted thereon, according to claim 1.
- dewatering screw presses are used to separate liquids and solids suspended therein. Many of these thickening and dewatering units are used particularly in the pulp and paper industry, since in this industrial sector water / pulp mixtures or in other words, suspensions are always used. Drainage screw presses have proved to be very efficient machines, especially in the thickening of suspensions of 3.5% to 4% solids content in the feed to 25 to 35% solids content in the outlet. Such a screw press is inter alia in the AT398 090 described.
- the JP 63154297 A describes a (vertical) filter with compression screw, where in the compression area no more drainage takes place.
- the DE 299 01 683 U1 describes a screw press with cones and an axially displaceable hollow shaft.
- the aim of the invention is therefore to increase the screen area at a given length and diameter.
- a favorable development of the invention is characterized in that the fixed tube is a screen tube, wherein the fixed tube may also have grooves or surfaces which counteract the co-rotation.
- An advantageous embodiment of the invention is characterized in that the fixed tube has at least one filtrate channel, wherein the filtrate channel can be formed by a further tube between the fixed tube and the shaft journal.
- An advantageous development of the invention is characterized in that the filtrate channel is divided by means of web plates into a plurality of separate filtrate channels.
- a screw press 1 as in Fig. 1 consists of an inlet housing 2, an outlet housing 3, a worm shaft 4 with one or more helical worm gears 5 mounted on the worm shaft, which worm helixes 5 can be made both continuous and interrupted, and a housing shell 6 surrounding this worm shaft 4 arises between the housing shell 6, the worm shaft 4 and the spiral screw helix 5, a conveying gap 7 for the dewatered Suspension.
- This conveying gap 7 can change its geometry along the axis of the worm shaft 4, but this need not necessarily.
- the principle of the screw press 1 is as follows: The worm shaft 4, which is mounted within the housing shell 6 is set by a drive of any kind in a rotary motion.
- a suspension is supplied.
- the rotating shaft 4 moves this suspension through the spiral helix 5 within the Conveying gap 7 in the direction of connected to the housing shell 6 outlet housing 3.
- the housing shell 6 a dewatering screw press 1 is usually designed as a sieve.
- the conveying gap 7 formed by the shaft 4, the worm gear 5 and the housing jacket 6 changes its geometry along the shaft axis, in the direction of the outlet housing 3, in a manner which facilitates dewatering. In most cases, the available volume along the shaft axis is reduced so to force the drainage of the suspension. The liquid thus released is discharged through the housing jacket 6 designed as a sieve.
- the screw helix 5 merges into a freely projecting spiral helix 8.
- the coil 8 is not necessarily sauish matter (as shown) executed. To increase the strength of the helix, this could also be stiffened with a U-profile.
- the freely projecting helix 8 passes with a sufficient gap over a fixed tube 9 in the inlet region of the screw press 1.
- This tube 9 is firmly connected to the frame of the screw press 1 and performs no rotational movement.
- the attached to the frame of the press 1 tube 9 is preferably designed as a sieve which in the inlet region of the press 1, the screen area is increased enormously.
- the tube 9 need not be designed as a sieve tube, but may also have any grooves or a macroscopic or microscopic rough surface. Through this surface, as well as by grooves or a sieve of the co-rotation is counteracted. This causes in addition to better drainage that the solid suspension (pulp suspension) no longer adheres to the metallic surface and thereby an axial transport of solids is ensure
- the shaft 10 of the conventional worm shaft 4 is performed by the attached to the frame of the press 1 tube 9 and stored conventionally after the housing feedthrough.
- Fig. 2 shows the inlet part 2 according to the invention a screw press 1.
- the suspension enters the inlet nozzle 11 a.
- the entire inlet part is connected in the illustrated embodiment by means of flange 12 with the housing shell 6.
- the inlet part can also be designed differently.
- the inlet part 2 has a tube 9, which is firmly connected thereto, as shown here by way of example by means of screws.
- a concentric tube 13 which has a larger diameter, than the shaft journal 10 (not shown), is provided.
- Tube 9 and tube 13 thus form a filtrate channel 14.
- This filtrate channel 14 can also be divided by web plates into a plurality of separate filtrate channels.
- the filtrate collected in the tube 9 is then passed through the filtrate channel 14 in the Filtratsammelflansch 15 and in this embodiment, for example via a Filtratsammelpfanne 16 in the filtrate pan 17 (FIG. Fig. 1 ) of the screw press 1 passed.
- Fig. 3 is now a section through a worm shaft 4 shown.
- the present invention offers two advantages over conventional screw presses:
- the sieve surface in the inlet region 2 of the screw press 1 is increased by a factor of 1.5 to 1.8. This significantly increases the drainage performance of the press 1.
- the co-rotation of the pulp is reduced. Fibers show a tendency to adhere to the rotating shaft. If the fiber adheres to the worm shaft 4, the axial transport is reduced or even comes to a standstill.
- the decisive factors for this co-rotation are the friction conditions inside the press. In conventional presses as well as in the conventional part of the screw extruder 1 4 1, the pulp is prevented by the designed as a sieve housing shell 6 of the press 1 to the co-rotation.
- the worm shaft 4 itself tries to put the pulp in a rotary motion.
- the pulp adheres to the surface of the worm shaft 4 and then co-rotates at the shaft speed without experiencing substantial axial feed.
- the adhesion of the pulp to the rotating worm shaft 4 in the inlet region is prevented by the fact that only a stationary pipe 9 is installed in the inlet region 2.
- the tube 9 is preferably designed as a sieve, but may also have any grooves or a macroscopically or microscopically rough surface. These grooves or macroscopically or microscopically rough surface can also be mounted on a tube 9 designed as a sieve.
- the worm shaft 4 or actually the pin 10 rotates within this tube 9.
- Both the sieve-like housing jacket 6 and the sieve tube 9 inserted in the inlet region 2 prevent the fibrous material from rotating.
- the cantilevered Spiral 8 passes over the sieve tube 9 and transports the pulp purely axially forward. This leads to a considerable increase in the transport efficiency and thus to an increased material removal from the inlet region 2 of the press 1, whereby the inlet mass flow is increased.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Sludge (AREA)
- Paper (AREA)
- Press Drives And Press Lines (AREA)
Description
Die Erfindung betrifft eine Schneckenpresse mit einer Welle und darauf angebrachter spiralförmigen Wendel, gemäß Anspruch 1.The invention relates to a screw press with a shaft and helical coil mounted thereon, according to
Im Allgemeinen werden Entwässerungs-Schneckenpressen zum Separieren von Flüssigkeiten und darin suspendierten Feststoffen verwendet. Besonders in der Papier und Zellstoffindustrie werden viele dieser Eindick- und Entwässerungsaggregate verwendet, da in diesem Industriebereich immer mit Wasser- / Faserstoff- Gemischen oder in anderen Worten Suspensionen gearbeitet wird. Entwässerungs-Schneckenpressen haben sich besonders im Bereich der Eindickung von Suspensionen von 3,5 % bis 4 % Feststoffmassenanteil im Zulauf auf 25 bis 35 % Feststoffmassenanteil im Auslauf als sehr effiziente Maschinen erwiesen. Eine derartige Schneckenpresse ist u.a. in der
Ziel der Erfindung ist es daher die Siebfläche bei gegebener Länge und Durchmesser zu erhöhen.The aim of the invention is therefore to increase the screen area at a given length and diameter.
Dies erfolgt erfindungsgemäß dadurch, dass ein Spalt zwischen Rohr und Wendel vorgesehen ist und wobei der Wellenzapfen (10) der Schneckenpresse (1) durch die frei auskragende Wendel (8) und der Wellenzapfen (10) durch das feststehende Rohr (9) geführt ist. Dadurch kann die zur Verfügung stehende Siebfläche im Einlaufbereich der Entwässerungs-Schneckenpresse um einen Faktor in der Größenordnung von 1,5 bis 1,8 vergrößert werden. Dabei wird sowohl die Entwässerungs- als auch die Durchsatzleistung der Schneckenpresse gesteigert. Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass das Rohr feststehend ausgebildet und mit dem Rahmen der Schneckenpresse verbunden ist. Damit ist eine gute Ableitung der Flüssigkeit ohne Abdichtungsprobleme gegeben.This is done according to the invention in that a gap between the tube and coil is provided and wherein the shaft journal (10) of the screw press (1) through the freely projecting coil (8) and the shaft journal (10) through the fixed tube (9) is guided. As a result, the available screen area in the inlet area of the dewatering screw press can be increased by a factor of the order of 1.5 to 1.8. Both the drainage and the throughput of the screw press are increased. An advantageous development of the invention is characterized in that the tube is fixed and connected to the frame of the screw press. This gives a good discharge of the liquid without sealing problems.
Eine günstige Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass das feststehende Rohr ein Siebrohr ist, wobei das feststehende Rohr auch Nuten oder Oberflächen aufweisen kann, die der Co-Rotation entgegen wirken.A favorable development of the invention is characterized in that the fixed tube is a screen tube, wherein the fixed tube may also have grooves or surfaces which counteract the co-rotation.
Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass das feststehende Rohr mindestens einen Filtratkanal aufweist, wobei der Filtratkanal durch ein weiteres Rohr zwischen feststehendem Rohr und Wellenzapfen gebildet werden kann.An advantageous embodiment of the invention is characterized in that the fixed tube has at least one filtrate channel, wherein the filtrate channel can be formed by a further tube between the fixed tube and the shaft journal.
Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass der Filtratkanal mittels Stegblechen in mehrere voneinander getrennte Filtratkanäle unterteilt ist.An advantageous development of the invention is characterized in that the filtrate channel is divided by means of web plates into a plurality of separate filtrate channels.
Die Erfindung wird nun anhand der Zeichnungen beispielhaft beschrieben, wobei
-
Fig. 1 eine Darstellung der erfindungsgemäßen Schneckenpresse, -
Fig. 2 den Einlaufteil der erfindungsgemäßen Schneckenpresse und -
Fig. 3 eine Schneckenwelle gemäß der Erfindung darstellt.
-
Fig. 1 a representation of the screw press according to the invention, -
Fig. 2 the inlet part of the screw press according to the invention and -
Fig. 3 represents a worm shaft according to the invention.
Eine Schneckenpresse 1 wie in
Der Wellenzapfen 10 der konventionellen Schneckenwelle 4 wird durch das am Rahmen der Presse 1 befestigte Rohr 9 durchgeführt und nach der Gehäusedurchführung konventionell gelagert.The
In
Die vorliegende Erfindung bietet zwei Vorteile gegenüber konventionellen Schneckenpressen:
Die Siebfläche im Einlaufbereich 2 der Schneckenpresse 1 wird um den Faktor 1,5 bis 1,8 vergrößert. Dies steigert die Entwässerungsleistung der Presse 1 signifikant.The present invention offers two advantages over conventional screw presses:
The sieve surface in the
Weiters wird die Co-Rotation des Faserstoffes reduziert. Faserstoffe zeigen eine Neigung an der drehenden Welle anzuhaften. Haftet der Faserstoff an der Schneckenwelle 4 wird der axiale Transport vermindert oder kommt sogar zum Erliegen. Ausschlaggebend für diese Co-Rotation sind im großen Maße die Reibungsverhältnisse im Inneren der Presse. In konventionellen Pressen wie auch im konventionellen Teil 4,5 der Schneckenpresse 1 wird der Faserstoff vom als Sieb ausgeführten Gehäusemantel 6 der Presse 1 an der Co-Rotation gehindert. Die Schneckenwelle 4 selbst versucht den Faserstoff jedoch in eine Rotationsbewegung zu versetzen. Zusätzlich dazu haftet der Faserstoff an der Oberfläche der Schneckenwelle 4 an und co-rotiert dann mit der Wellendrehzahl ohne dabei noch einen wesentlichen axialen Vorschub zu erfahren. In der gegenwärtigen Erfindung wird das Anhaften des Faserstoffes an der rotierenden Schneckenwelle 4 im Einlaufbereich dadurch verhindert, dass im Einlaufbereich 2 nur ein stehendes Rohr 9 eingebaut ist. Das Rohr 9 ist vorzugsweise als Sieb ausgeführt, kann aber auch beliebige Nuten oder eine makroskopisch bzw. mikroskopisch raue Oberfläche aufweisen. Diese Nuten bzw. makroskopisch bzw. mikroskopisch raue Oberfläche kann auch auf einem als Sieb ausgeführten Rohr 9 angebracht sein. Die Schneckenwelle 4 oder eigentlich der Zapfen 10 dreht sich innerhalb dieses Rohres 9. Sowohl der siebartige Gehäusemantel 6, als auch das im Einlaufbereich 2 eingesetzte Siebrohr 9 hindern den Faserstoff an der Rotation. Die auskragende Wendel 8 überstreicht das Siebrohr 9 und transportiert den Faserstoff rein axial vorwärts. Dies führt zu einer erheblichen Steigerung der Transporteffizienz und somit zu einem erhöhten Materialabtransport aus dem Einlaufbereich 2 der Presse 1, wodurch der Einlaufmassenstrom erhöht wird.Furthermore, the co-rotation of the pulp is reduced. Fibers show a tendency to adhere to the rotating shaft. If the fiber adheres to the
Claims (6)
- Screw press (1) with a shaft (4) and helical conveying flight (5) mounted on it, a shaft journal (10) and a housing shell (6) surrounding the flight (5), where the flight (5) becomes a freely projecting flight (8) in the inlet area (2) of the screw press (1), where a stationary pipe (9) is provided in the inlet area (2) of the screw press (1) over which the freely projecting flight (8) sweeps, characterized in that a gap is provided between pipe (9) and flight (8), where the stationary pipe (9) is a screen pipe and where the shaft journal (10) of the screw press (1) is guided through the freely projecting flight (8) and the shaft journal (10) through the stationary pipe (9).
- Screw press according to claim 1, characterized in that the pipe (9) is stationary and connected to the frame of the screw press (1).
- Screw press according to one of claims 1 to 2, characterized in that the stationary pipe (9) has grooves or surfaces that counteract co-rotation.
- Screw press according to one of Claims 1 to 3, characterized in that the stationary pipe (9) has at least one filtrate channel (14).
- Screw press according to claim 4, characterized in that the filtrate channel (14) is formed by another pipe (13) between the stationary pipe (9) and the shaft journal (10).
- Screw press according to claim 4 or 5, characterized in that the filtrate channel (14) is divided by means of web plates into several filtrate channels that are separate from one another
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA1475/2011A AT511982B1 (en) | 2011-10-11 | 2011-10-11 | SCREW PRESS |
PCT/EP2012/003785 WO2013053418A1 (en) | 2011-10-11 | 2012-09-10 | Screw press |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2766177A1 EP2766177A1 (en) | 2014-08-20 |
EP2766177B1 true EP2766177B1 (en) | 2018-12-26 |
Family
ID=46970208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12768712.7A Not-in-force EP2766177B1 (en) | 2011-10-11 | 2012-09-10 | Screw press |
Country Status (10)
Country | Link |
---|---|
US (1) | US10005252B2 (en) |
EP (1) | EP2766177B1 (en) |
JP (1) | JP6147260B2 (en) |
CN (1) | CN103946017B (en) |
AT (1) | AT511982B1 (en) |
BR (1) | BR112014008559A2 (en) |
CA (1) | CA2851289C (en) |
CL (1) | CL2014000907A1 (en) |
RU (1) | RU2606820C2 (en) |
WO (1) | WO2013053418A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10118358B2 (en) * | 2014-12-22 | 2018-11-06 | Us Farm Systems, Inc. | Screw press for separation of liquid from bulk materials |
CN108081430A (en) * | 2017-12-14 | 2018-05-29 | 王伟 | A kind of production equipment of plant fiber or high polymer material composite wood |
CN107932961A (en) * | 2017-12-21 | 2018-04-20 | 中科国兴(北京)科技有限公司 | A kind of solid-liquid separating machine |
DE102018113135A1 (en) | 2018-06-01 | 2019-12-05 | Bernhard Giersberg | Device for sewage sludge dewatering |
CN110345720A (en) * | 2019-08-08 | 2019-10-18 | 沈阳远大科技实业有限公司 | A kind of screw extrusion dewaterer |
CN110526541A (en) * | 2019-08-26 | 2019-12-03 | 南京爱斯利尔环保设备工程有限公司 | A kind of pressafiner |
CN113002046B (en) * | 2021-03-03 | 2021-12-14 | 林美珊 | Spiral extrusion type solid-liquid separator |
CN113198240A (en) * | 2021-05-07 | 2021-08-03 | 抚州市第一中医医院(江西中医药高等专科学校附属医院) | Traditional chinese medical science cardiovascular medicine residue collection device |
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-
2011
- 2011-10-11 AT ATA1475/2011A patent/AT511982B1/en not_active IP Right Cessation
-
2012
- 2012-09-10 EP EP12768712.7A patent/EP2766177B1/en not_active Not-in-force
- 2012-09-10 JP JP2014534953A patent/JP6147260B2/en not_active Expired - Fee Related
- 2012-09-10 RU RU2014116883A patent/RU2606820C2/en active
- 2012-09-10 US US14/351,342 patent/US10005252B2/en not_active Expired - Fee Related
- 2012-09-10 BR BR112014008559A patent/BR112014008559A2/en not_active IP Right Cessation
- 2012-09-10 CA CA2851289A patent/CA2851289C/en not_active Expired - Fee Related
- 2012-09-10 CN CN201280050308.6A patent/CN103946017B/en not_active Expired - Fee Related
- 2012-09-10 WO PCT/EP2012/003785 patent/WO2013053418A1/en active Application Filing
-
2014
- 2014-04-10 CL CL2014000907A patent/CL2014000907A1/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0671491A (en) * | 1992-08-26 | 1994-03-15 | Hitachi Zosen Corp | Screw type dehydrating machine |
Also Published As
Publication number | Publication date |
---|---|
CA2851289C (en) | 2019-10-01 |
RU2606820C2 (en) | 2017-01-10 |
BR112014008559A2 (en) | 2017-04-18 |
AT511982B1 (en) | 2013-10-15 |
RU2014116883A (en) | 2015-11-20 |
US20150224730A1 (en) | 2015-08-13 |
CN103946017B (en) | 2016-08-03 |
CA2851289A1 (en) | 2013-04-18 |
CN103946017A (en) | 2014-07-23 |
JP2015502856A (en) | 2015-01-29 |
JP6147260B2 (en) | 2017-06-14 |
CL2014000907A1 (en) | 2014-06-27 |
US10005252B2 (en) | 2018-06-26 |
AT511982A1 (en) | 2013-04-15 |
EP2766177A1 (en) | 2014-08-20 |
WO2013053418A1 (en) | 2013-04-18 |
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