EP3548267B1 - Apparatus for continuously expressing liquid from a suspension - Google Patents
Apparatus for continuously expressing liquid from a suspension Download PDFInfo
- Publication number
- EP3548267B1 EP3548267B1 EP17790936.3A EP17790936A EP3548267B1 EP 3548267 B1 EP3548267 B1 EP 3548267B1 EP 17790936 A EP17790936 A EP 17790936A EP 3548267 B1 EP3548267 B1 EP 3548267B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- rotor
- sleeve
- filter cake
- 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.)
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- 239000007788 liquid Substances 0.000 title claims description 15
- 239000000725 suspension Substances 0.000 title claims description 4
- 239000012065 filter cake Substances 0.000 claims description 36
- 230000000717 retained effect Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 7
- 239000010802 sludge Substances 0.000 description 5
- 238000007791 dehumidification Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
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- 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
-
- 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
- B30B9/14—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 only one screw or worm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/32—Discharging presses
-
- 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
- B30B9/128—Vertical or inclined screw presses
-
- 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
- B30B9/26—Permeable casings or strainers
Definitions
- the invention relates to a device for continuously squeezing liquid out of a suspension, in particular a screw press, with a rotationally driven rotor which rotates in a tubular screw housing and carries a screw conveyor, the screw housing comprising a first filter jacket, the radial one, which at least partially interacts with the screw conveyor Has passages for discharging the filtered liquid and which feeds a filter cake, made of retained solids, to a discharge in the conveying direction of the conveyor screw, with the rotor, downstream of the conveyor screw, being assigned an annular first sleeve coaxially surrounding the rotor for peeling off an outer layer of filter cake from the filter cake .
- Such a device is from U.S. 1,299,524 A known, which discloses a device according to the preamble of claim 1, wherein the sleeve is arranged downstream of the filter in the conveying direction and serves to increase the dynamic pressure at the filter outlet.
- a second filter is also assigned to the rotor, which, however, cannot be cleaned during operation.
- Screw presses are used, for example, in wastewater treatment or purification in sewage treatment plants.
- a flocculant of a polymer or the like is usually added to the sludge of the sewage treatment plant in order to cause flocculation of the solids in the sludge, whereby the solid phase and the liquid phase of the sludge can be better separated.
- screw presses of this type are intended to ensure that the sewage sludge obtained has only the lowest possible liquid content. It should therefore be possible to separate the solid and liquid phases as effectively as possible.
- Such a screw press disclosed for example DE 60028187 T2 Screw presses of this type concentrate and dewater the sludge fed in by pressing and dewatering. The respective filter sizes depend on the sludge used or to be dried. However, such screw presses can also be used for other purposes, such as inorganic sludges in industry.
- This previously known filter for filtering out water from a fluid also includes, for example, a drum screen and a worm screw that rotates in the drum screen.
- the fluid is conveyed through the screen jacket in the conveying direction, with solids being held back by the screen jacket and conveyed further in the conveying direction, whereas liquid, in particular water, is pressed out through the screen jacket.
- the fluid is pressed out by compressing the retained substances in the conveying direction. After reaching a desired, specified residual moisture content in the retained solid mass, it is discharged from the screw press.
- the invention solves the problem in that a delivery channel for the remaining inner filter cake layer is provided between the sleeve and the rotor, and the rotor has a second filter in the area of the delivery channel for draining the filtered liquid through the rotor, with the first sleeve having at least one Rotor employed scraper is assigned to clean the filter cake from the second filter.
- the outer filter cake layer that is closer to the filter jacket and thus better squeezed out or freed from moisture is peeled off the filter cake with the annular first sleeve and removed from the device via the discharge.
- the inner layer of filter cake initially remains in the device, is conveyed further, driven by the pressure of the screw conveyor, and fed into the conveying channel for the remaining inner filter cake layer between the first sleeve and with pressure, where this inner filter cake layer continues via a second filter provided in this area of this conveying channel is drained.
- the liquid extracted from the filter cake is pressed through the second filter, into the interior of the rotor and subsequently discharged from the device via a corresponding discharge line.
- the inner filter cake layer is subsequently discharged from the device via the discharge.
- the second filter is also cleaned from the filter cake that has been pressed past, but in order to achieve an improved filter effect it is provided that the first sleeve is assigned at least one scraper set against the rotor for cleaning the filter cake from the second filter.
- This scraper can be attached to the first sleeve in the conveying channel and protrude radially from the sleeve towards the second filter.
- the scraper is preferably aligned parallel to the rotor axis with its scraper blade sliding on the second filter. If necessary, the cross-section of the conveying channel could narrow in the conveying direction, So be conical in order to increase the delivery pressure in the delivery direction for improved squeezing of the liquid.
- the first sleeve can be displaced parallel to the rotor axis with a drive.
- the first sleeve can have at least one cone, which ensures a clean cut between the inner and outer filter cake layers.
- the first sleeve be fitted with a second sleeve that can be displaced in the direction of the rotor axis with a drive, has a smaller inner diameter and surrounds the rotor with play Sleeve is subordinate. This sleeve narrows or widens the exit gap for the filter cake between the first and second sleeve, thereby allowing a corresponding counter-pressure setting. If the second sleeve is equipped with a cone that lifts the filter cake radially from the rotor on the inlet side, the remaining filter cake is also lifted from the second filter and fed to the discharge.
- a washing lance with cleaning nozzles directed towards the second filter be arranged inside the rotor between the second filter and the rotor axis. These washing nozzles ensure that material blocking filter openings or filter bores can be lifted from the inside with counter pressure from the filter surface and advantageously scraped off with the scraper.
- the second filter can comprise a fine sieve mounted on a filter holder, a filter cloth or a filter made of porous filter materials such as plastic or ceramic. The appropriate choice naturally depends on the fluid to be filtered.
- a device for continuously squeezing liquid out of a suspension namely a screw press 1
- the screw housing 2 comprises a first filter jacket 5 that interacts at least partially with the screw conveyor 3, which has radial passages 6 for discharging the filtered liquid and which feeds a filter cake K, made from retained solids, in the conveying direction 7 of the conveying screw 3 to a discharge 8 .
- a fluid to be filtered is introduced into the space between the conical conveyor screw 3 and the first filter jacket 5 and conveyed by the conveyor screw, which is driven in rotation about the rotor axis R, in the conveying direction 7 while the fluid is pressed out, with the retained by the first filter jacket 5 forming the filter cake Solids are conveyed in the conveying direction 7 to the discharge 8 and fluid passing through the passages 6 of the first filter jacket is discharged from the device via the outlet F.
- the conical screw conveyor 3 a cylindrical screw conveyor with a different pitch could also be used. Combinations of these are also conceivable.
- the worm can be single-threaded or (partially) multi-threaded.
- the rotor 4, downstream of the screw conveyor 3, is assigned an annular first sleeve 9 coaxially surrounding the rotor 4 for peeling off an outer filter cake layer 10 from the filter cake K, with a conveying channel 11 for the inner Filter cake layer 12 is provided and the rotor 4 has a second filter 13 for discharging the filtered liquid through the rotor 4 in the region of the conveying channel 11 .
- the first sleeve 9 has at least one scraper 14 set against the rotor 4 for cleaning the filter cake 12 from the second filter 13 .
- the first sleeve 9 is equipped with a drive 15, an indicated hydraulic drive, which can be displaced parallel to the rotor axis, and is equipped with at least one cone 16 on the starting side.
- first sleeve 9 is followed by a second sleeve 18, which can be displaced in the direction of the rotor axis R with a drive 17, also an indicated hydraulic drive, has a smaller inner diameter than the first sleeve 9 and surrounds the rotor with play , the filter cake has a cone 19 that lifts off radially from the rotor 4 .
- a washing lance 20 with cleaning nozzles 21 is arranged, which are directed towards the second filter 13.
- the second filter 13 can comprise a fine sieve mounted on a filter holder 22, a filter cloth or a filter made of porous filter materials such as plastic or ceramic. Liquid discharged by the rotor 4 is discharged from the device via a discharge 23 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
Description
Die Erfindung bezieht sich auf eine Vorrichtung zum kontinuierlichen Auspressen von Flüssigkeit aus einer Suspension, insbesondere Schneckenpresse, mit einem drehangetriebenen, in einem rohrförmigen Schneckengehäuse drehenden, eine Förderschnecke tragenden Rotor, wobei das Schneckengehäuse einen zumindest teilweise mit der Förderschnecke zusammenwirkenden ersten Filtermantel umfasst, der radiale Durchlässe zum Ableiten der filtrierten Flüssigkeit aufweist und der einen Filterkuchen, aus zurückgehaltenen Feststoffen, in Förderrichtung der Förderschnecke einem Austrag zuleitet, wobei dem Rotor, der Förderschnecke nachgeordnet, eine den Rotor koaxial umfassende, ringförmige erste Hülse zum Abschälen einer äußeren Filterkuchenschicht vom Filterkuchen zugeordnet ist.The invention relates to a device for continuously squeezing liquid out of a suspension, in particular a screw press, with a rotationally driven rotor which rotates in a tubular screw housing and carries a screw conveyor, the screw housing comprising a first filter jacket, the radial one, which at least partially interacts with the screw conveyor Has passages for discharging the filtered liquid and which feeds a filter cake, made of retained solids, to a discharge in the conveying direction of the conveyor screw, with the rotor, downstream of the conveyor screw, being assigned an annular first sleeve coaxially surrounding the rotor for peeling off an outer layer of filter cake from the filter cake .
Eine solche Vorrichtung ist aus der
Derartige Vorrichtungen, insbesondere Schneckenpressen, werden beispielsweise in der Abwasseraufbereitung bzw. -reinigung in Kläranlagen verwendet. Üblicherweise wird dem Schlamm der Kläranlage ein Flockungsmittel aus einem Polymer oder dgl. zugegeben, um ein Flocken der Feststoffe im Schlamm zu bewirken, womit die feste und die flüssige Phase des Schlammes besser getrennt werden können. Zudem soll mit derartigen Schneckenpressen gewährleistet werden, dass der gewonnene Klärschlamm nur einen möglichst geringen Flüssigkeitsanteil aufweist. Es soll also eine möglichst effektive Trennung zwischen fester und flüssiger Phase möglich sein. Eine derartige Schneckenpresse offenbart beispielsweise die
Eine weitere derartige bekannte Vorrichtung zeigt beispielsweise die
Nachteilig ist bei den vorbekannten Pressen insbesondere, dass der maximal erzielbare Entfeuchtungsgrad der zurückgehaltenen Masse, insbesondere bei grö-ßeren Schneckenpressen, durch die eingesetzte Technologie begrenzt ist, da die Mächtigkeit (dicke) des Filterkuchens die den maximal erzielbaren Entfeuchtungsgrad begrenzt.The particular disadvantage of the previously known presses is that the maximum achievable degree of dehumidification of the retained mass, especially with larger screw presses, is limited by the technology used, since the thickness (thickness) of the filter cake limits the maximum achievable degree of dehumidification.
Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs geschilderten Art zu schaffen, die, insbesondere auch bei größeren Schneckenpressen, einen verbesserten Entfeuchtungsgrad im ausgepressten Filterkuchen erreichen kann.It is the object of the invention to provide a device of the type described at the outset, which can achieve an improved degree of dehumidification in the pressed-out filter cake, particularly in the case of larger screw presses.
Die Erfindung löst die gestellte Aufgabe dadurch, dass zwischen Hülse und Rotor ein Förderkanal für die verbliebene innere Filterkuchenschicht vorgesehen ist und der Rotor im Bereich des Förderkanals ein zweites Filter zum Ableiten der filtrierten Flüssigkeit durch den Rotor aufweist, wobei der ersten Hülse wenigstens ein gegen den Rotor angestellter Schaber zum Abreinigen des Filterkuchens vom zweiten Filter zugeordnet ist.The invention solves the problem in that a delivery channel for the remaining inner filter cake layer is provided between the sleeve and the rotor, and the rotor has a second filter in the area of the delivery channel for draining the filtered liquid through the rotor, with the first sleeve having at least one Rotor employed scraper is assigned to clean the filter cake from the second filter.
Erfindungsgemäß wird also die dem Filtermantel nähere und dadurch besser ausgepresste bzw. von Feuchtigkeit befreite äußere Filterkuchenschicht mit der ringförmigen ersten Hülse vom Filterkuchen abgeschält und aus der Vorrichtung über den Austrag ausgebracht. Die innere Filterkuchenschicht verbleibt zunächst noch in der Vorrichtung, wird durch den Druck der Förderschnecke angetrieben weitergefördert und in den Förderkanal für die verbliebene innere Filterkuchenschicht zwischen erster Hülse und mit Druck eingeleitet, wo diese innere Filterkuchenschicht über einen in diesem Bereich dieses Förderkanals vorgesehenen zweiten Filter weiter entwässert wird. Dem Filterkuchen dabei entzogene Flüssigkeit wird durch das zweite Filter hindurch, in das Rotorinnere hineingepresst und aus diesem in weiterer Folge über eine entsprechende Ableitung aus der Vorrichtung abgeleitet.According to the invention, the outer filter cake layer that is closer to the filter jacket and thus better squeezed out or freed from moisture is peeled off the filter cake with the annular first sleeve and removed from the device via the discharge. The inner layer of filter cake initially remains in the device, is conveyed further, driven by the pressure of the screw conveyor, and fed into the conveying channel for the remaining inner filter cake layer between the first sleeve and with pressure, where this inner filter cake layer continues via a second filter provided in this area of this conveying channel is drained. The liquid extracted from the filter cake is pressed through the second filter, into the interior of the rotor and subsequently discharged from the device via a corresponding discharge line.
Damit lässt sich der Entfeuchtungsgrad des Filterkuchens merklich verbessern. Die auf diese Weise hinsichtlich ihrer Restfeuchte reduzierte innere Filterkuchenschicht wird in weiterer Folge wiederum über den Austrag aus der Vorrichtung abgeleitet.This allows the degree of dehumidification of the filter cake to be noticeably improved. The inner filter cake layer, reduced in this way in terms of its residual moisture, is subsequently discharged from the device via the discharge.
Der zweite Filter wird zwar auch vom vorbeigepressten Filterkuchen abgereinigt, allerdings ist es um eine verbesserte Filterwirkung zu erzielen vorgesehen, dass der ersten Hülse wenigstens ein gegen den Rotor angestellter Schaber zum Abreinigen des Filterkuchens vom zweiten Filter zugeordnet ist. Dieser Schaber kann dabei an der ersten Hülse im Förderkanal befestigt sein und von der Hülse gegen den zweiten Filter radial vorragen. Der Schaber ist dabei vorzugsweise mit seiner am zweiten Filter gleitenden Schaberklinge rotorachsparallel ausgerichtet. Gegebenenfalls könnte sich der Querschnitt des Förderkanals in Förderrichtung verengen, also konisch ausgebildet sein, um den Förderdruck in Förderrichtung zur verbesserten Auspressung der Flüssigkeit zu steigern.The second filter is also cleaned from the filter cake that has been pressed past, but in order to achieve an improved filter effect it is provided that the first sleeve is assigned at least one scraper set against the rotor for cleaning the filter cake from the second filter. This scraper can be attached to the first sleeve in the conveying channel and protrude radially from the sleeve towards the second filter. The scraper is preferably aligned parallel to the rotor axis with its scraper blade sliding on the second filter. If necessary, the cross-section of the conveying channel could narrow in the conveying direction, So be conical in order to increase the delivery pressure in the delivery direction for improved squeezing of the liquid.
Um den Gegendruck bzw. das Abschälverhalten der ringförmigen ersten Hülse bezüglich des Filterkuchens vorteilhaft einstellen zu können, ist es von Vorteil, wenn die erste Hülse mit einem Antrieb rotorachsparallel verlagerbar ist.In order to be able to advantageously set the counter-pressure or the peeling behavior of the annular first sleeve with respect to the filter cake, it is advantageous if the first sleeve can be displaced parallel to the rotor axis with a drive.
Anlaufseitig kann die erste Hülse wenigstens einen Konus aufweisen, der für einen sauberen Schnitt zwischen innerer und äußerer Filterkuchenschicht sorgt. Um zudem den Gegendruck für den im Förderkanal verbliebenen inneren Filterkuchen zwecks Einstellung des Trocknungsgrades vorteilhaft einstellen zu können, wird vorgeschlagen, dass der ersten Hülse eine mit einem Antrieb in Richtung der Rotorachse verlagerbare, vom Innendurchmesser her kleinere, und den Rotor mit Spiel umfassende, zweite Hülse nachgeordnet ist. Diese Hülse verengt oder weitet den Ausgangsspalt für den Filterkuchen zwischen erster und zweiter Hülse und erlaubt dadurch eine entsprechende Gegendruckeinstellung. Ist die zweite Hülse dabei anlaufseitig mit einem den Filterkuchen radial vom Rotor abhebenden Konus ausgestattet, so wird auch der verbliebene Filterkuchen vom zweiten Filter abgehoben und dem Austrag zugeleitet.On the approach side, the first sleeve can have at least one cone, which ensures a clean cut between the inner and outer filter cake layers. In order to be able to advantageously adjust the back pressure for the inner filter cake remaining in the conveying channel for the purpose of adjusting the degree of drying, it is proposed that the first sleeve be fitted with a second sleeve that can be displaced in the direction of the rotor axis with a drive, has a smaller inner diameter and surrounds the rotor with play Sleeve is subordinate. This sleeve narrows or widens the exit gap for the filter cake between the first and second sleeve, thereby allowing a corresponding counter-pressure setting. If the second sleeve is equipped with a cone that lifts the filter cake radially from the rotor on the inlet side, the remaining filter cake is also lifted from the second filter and fed to the discharge.
Um den zweiten Filter vorteilhaft reinigen zu können, wird vorgeschlagen, dass innerhalb des Rotors zwischen dem zweiten Filter und der Rotorachse eine Waschlanze mit Reinigungsdüsen angeordnet ist, die gegen den zweiten Filter gerichtet sind. Diese Waschdüsen sorgen dafür, dass Filteröffnungen bzw. Filterbohrungen verlegendes Material von innen mit Gegendruck von der Filteroberfläche abgehoben und vorteilhaft mit dem Schaber abgeschabt werden kann.In order to be able to advantageously clean the second filter, it is proposed that a washing lance with cleaning nozzles directed towards the second filter be arranged inside the rotor between the second filter and the rotor axis. These washing nozzles ensure that material blocking filter openings or filter bores can be lifted from the inside with counter pressure from the filter surface and advantageously scraped off with the scraper.
Das zweite Filter kann ein auf einem Siebträger aufgezogenes Feinsieb, ein Filtertuch oder ein Filter aus porösen Filterwerkstoffen, wie Kunststoff oder Keramik, umfassen. Die entsprechende Wahl hängt naturgemäß vom zu filtrierenden Fluid ab.The second filter can comprise a fine sieve mounted on a filter holder, a filter cloth or a filter made of porous filter materials such as plastic or ceramic. The appropriate choice naturally depends on the fluid to be filtered.
In der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen
- Fig. 1
- eine erfindungsgemäße Vorrichtung in teilgeschnittenem Querschnitt und
- Fig. 2
- den linken Ausschnitt der Vorrichtung aus
Fig. 1 im Bereich des zweiten Filters in vergrößertem Maßstab.
- 1
- a device according to the invention in partially cut cross section and
- 2
- the left section of the
device 1 in the area of the second filter on an enlarged scale.
Eine Vorrichtung zum kontinuierlichen Auspressen von Flüssigkeit aus einer Suspension, nämlich eine Schneckenpresse 1, umfasst einen drehangetriebenen, in einem rohrförmigen Schneckengehäuse 2 drehenden, eine Förderschnecke 3 tragenden Rotor 4. Das Schneckengehäuse 2 umfasst einen zumindest teilweise mit der Förderschnecke 3 zusammenwirkenden ersten Filtermantel 5, der radiale Durchlässe 6 zum Ableiten der filtrierten Flüssigkeit aufweist und der einen Filterkuchen K, aus zurückgehaltenen Feststoffen, in Förderrichtung 7 der Förderschnecke 3 einem Austrag 8 zuleitet.A device for continuously squeezing liquid out of a suspension, namely a
Ein zu filtrierendes Fluid wird in den Raum zwischen der konischen Förderschnecke 3 und dem ersten Filtermantel 5 eingebracht und von der, um die Rotorachse R drehangetriebenen, Förderschnecke in Förderrichtung 7 unter Auspressung des Fluides gefördert, wobei die vom ersten Filtermantel 5 zurückgehaltenen, den Filterkuchen bildenden Feststoffe in Förderrichtung 7 zum Austrag 8 hin gefördert werden und durch die Durchlässe 6 des ersten Filtermantels hindurchtretendes Fluid aus der Vorrichtung über den Ablass F abgeleitet wird. Statt der konischen Förderschnecke 3 könnte auch eine zylindrische Förderschnecke mit unterschiedlicher Steigung zum Einsatz kommen. Auch Kombinationen davon sind denkbar. Zudem kann die Schnecke eingängig oder (teilweise) mehrgängig ausgebildet sein.A fluid to be filtered is introduced into the space between the
Erfindungsgemäß ist dem Rotor 4, der Förderschnecke 3 nachgeordnet, eine den Rotor 4 koaxial umfassende, ringförmige erste Hülse 9 zum Abschälen einer äu-ßeren Filterkuchenschicht 10 vom Filterkuchen K zugeordnet, wobei zwischen der Hülse 9 und dem Rotor 4 ein Förderkanal 11 für die innere Filterkuchenschicht 12 vorgesehen ist und der Rotor 4 in dem Bereich des Förderkanals 11 ein zweites Filter 13 zum Ableiten der filtrierten Flüssigkeit durch den Rotor 4 aufweist.According to the invention, the
Die erste Hülse 9 weist wenigstens einen gegen den Rotor 4 angestellten Schaber 14 zum Abreinigen des Filterkuchens 12 vom zweiten Filter 13 auf. Dabei ist die erste Hülse 9 mit einem Antrieb 15, einem angedeuteten hydraulischen Antrieb, rotorachsenparallel verlagerbar, und anlaufseitig mit wenigstens einem Konus 16 ausgestattet.The
Zudem ist der ersten Hülse 9 eine mit einem Antrieb 17, ebenfalls einem angedeuteten hydraulischen Antrieb, in Richtung der Rotorachse R verlagerbare, vom Innendurchmesser im Vergleich zur ersten Hülse 9 her kleinere, und den Rotor mit Spiel umfassende zweite Hülse 18 nachgeordnet, die einen anlaufseitigen, den Filterkuchen radial vom Rotor 4 abhebenden Konus 19 aufweist.In addition, the
Zudem ist innerhalb des Rotors 4, zwischen dem zweiten Filter 13 und der Rotorachse R, eine Waschlanze 20 mit Reinigungsdüsen 21 angeordnet, die gegen den zweiten Filter 13 gerichtet sind. Das zweite Filter 13 kann ein auf einem Siebträger 22 aufgezogenes Feinsieb, ein Filtertuch oder ein Filter aus porösen Filterwerkstoffen, wie Kunststoff oder Keramik, umfassen. Durch den Rotor 4 abgeleitete Flüssigkeit wird über einen Austrag 23 aus der Vorrichtung ausgebracht.In addition, inside the
Claims (8)
- Apparatus for continuously pressing liquid out of a suspension, in particular a screw press (1), comprising a rotationally driven rotor (4) which rotates in a tubular screw housing (2) and supports a conveyor screw (3), wherein the screw housing (2) includes a first filter casing (5) which cooperates at least partially with the conveyor screw (3) and has radial passages (6) for diverting the filtered liquid and supplies a filter cake (K), consisting of retained solids, in the conveyance direction (7) of the conveyor screw (3) to a discharge (8), wherein the rotor (4), disposed downstream of the conveyor screw (3), is allocated an annular first sleeve (9), which coaxially encloses the rotor (4), for peeling off an outer filter cake layer (10) from the filter cake (K), wherein a conveyance channel (11) for the inner filter cake layer (12) which has remained is provided between the sleeve (9) and the rotor (4), and the rotor (4) has, in the region of the conveyance channel (11), a second filter (13) for diverting the filtered liquid through the rotor (4), characterised in that the first sleeve (9) is allocated at least one scraper (14), which is aligned with respect to the rotor (4), for cleaning the filter cake (12) from the second filter (13).
- Apparatus as claimed in claim 1, characterised in that the first sleeve (9) is displaceable in parallel with the rotor axis by means of a drive (15).
- Apparatus as claimed in claim 1 or 2, characterised in that the first sleeve (9) has at least one cone (16) on the intake side.
- Apparatus as claimed in any one of claims 1 to 3, characterised in that a second sleeve (18) which is displaceable in the direction of the rotor axis (R) by means of a drive (17), is smaller in terms of internal diameter and encloses the rotor (4) with clearance is disposed downstream of the first sleeve (9).
- Apparatus as claimed in claim 4, characterised in that on the intake side, the second sleeve (18) has a cone (19) which lifts filter cake (12) radially off the rotor (4).
- Apparatus as claimed in claims 2 to 5, characterised in that the first sleeve (9) and the second sleeve (18) are displaceable in parallel with the rotor axis by means of a common drive.
- Apparatus as claimed in any one of claims 1 to 6, characterised in that a washing lance (20) having cleaning nozzles (21) directed towards the second filter (13) is disposed inside the rotor (4) between the second filter (13) and the rotor axis (R).
- Apparatus as claimed in any one of claims 1 to 7, characterised in that the second filter (13) includes a fine screen drawn onto a screen support (22), a filter cloth or a filter consisting of porous filter materials, such as synthetic materials or ceramic.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA51087/2016A AT519379B1 (en) | 2016-11-30 | 2016-11-30 | Device for the continuous squeezing of liquid from a suspension |
| PCT/AT2017/050025 WO2018098512A1 (en) | 2016-11-30 | 2017-10-02 | Apparatus for continuously expressing liquid from a suspension |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3548267A1 EP3548267A1 (en) | 2019-10-09 |
| EP3548267C0 EP3548267C0 (en) | 2023-06-07 |
| EP3548267B1 true EP3548267B1 (en) | 2023-06-07 |
Family
ID=60185935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17790936.3A Active EP3548267B1 (en) | 2016-11-30 | 2017-10-02 | Apparatus for continuously expressing liquid from a suspension |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11298903B2 (en) |
| EP (1) | EP3548267B1 (en) |
| AT (1) | AT519379B1 (en) |
| PL (1) | PL3548267T3 (en) |
| WO (1) | WO2018098512A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065257B (en) * | 2019-04-19 | 2021-07-20 | 广西长寿奥秘科技有限公司 | Squeezing device for processing edible oil and facilitating adjustment of squeezing interlayer |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1299524A (en) * | 1918-04-18 | 1919-04-08 | Larrowe Construction Company | Pulp-press. |
| US1851191A (en) * | 1927-02-11 | 1932-03-29 | American Voith Contact Co | Pulp screw press |
| US1838996A (en) * | 1928-02-15 | 1931-12-29 | American Voith Contact Co | Screw press for dewatering and washing diluted substances |
| US2930314A (en) | 1957-04-15 | 1960-03-29 | Chisholm Ryder Co Inc | Juice extractor |
| JPH04157095A (en) | 1990-10-15 | 1992-05-29 | Ishigaki Mech Ind Co | Screw press |
| JPH0698515B2 (en) | 1990-11-29 | 1994-12-07 | 石垣機工株式会社 | Screw press operating method and device |
| JPH0763873B2 (en) | 1991-12-20 | 1995-07-12 | 富国工業株式会社 | Rotary sieve |
| 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 |
| JP2544706B2 (en) | 1994-03-25 | 1996-10-16 | 富国工業株式会社 | Continuous press |
| SE9500526D0 (en) * | 1995-02-14 | 1995-02-14 | Tetra Laval Holdings & Finance | Device for thickening pulp |
| ATE327092T1 (en) | 1999-11-09 | 2006-06-15 | Ishigaki Mech Ind | SCREW PRESS |
| FR2815288B1 (en) * | 2000-10-16 | 2003-01-24 | Euratec | SCREW PRESS |
| JP4532722B2 (en) * | 2000-11-28 | 2010-08-25 | 三菱化工機株式会社 | Screw press |
| JP3955456B2 (en) * | 2001-10-30 | 2007-08-08 | 三菱化工機株式会社 | Screw press |
| AT412857B (en) * | 2002-07-19 | 2005-08-25 | Andritz Ag Maschf | SCREW PRESSURE FOR REMOVING LIQUID FROM SOLID-LIQUID MIXTURES, ESPECIALLY FIBER-SUSPENSIONS |
| EP1586439B1 (en) | 2004-04-15 | 2016-07-27 | Andritz AG | screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions |
| US7347140B2 (en) * | 2005-01-21 | 2008-03-25 | Andritz Ag | Screw press for separation of liquid from solid-liquid mixtures especially pulp suspensions |
| US20090050580A1 (en) * | 2005-06-16 | 2009-02-26 | Tsukishima Kikai Co., Ltd. | Filtering Apparatus and Filtering Method |
| CN200973996Y (en) * | 2006-09-01 | 2007-11-14 | 李素娟 | Screw type ceramic filter |
| JP6118711B2 (en) * | 2013-10-31 | 2017-04-19 | 月島機械株式会社 | Vertical screw press filtration device |
| DE202015009140U1 (en) * | 2015-12-01 | 2016-11-03 | Voith Patent Gmbh | screw Press |
-
2016
- 2016-11-30 AT ATA51087/2016A patent/AT519379B1/en active
-
2017
- 2017-10-02 PL PL17790936.3T patent/PL3548267T3/en unknown
- 2017-10-02 WO PCT/AT2017/050025 patent/WO2018098512A1/en unknown
- 2017-10-02 US US16/464,445 patent/US11298903B2/en active Active
- 2017-10-02 EP EP17790936.3A patent/EP3548267B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3548267C0 (en) | 2023-06-07 |
| US20190375178A1 (en) | 2019-12-12 |
| US11298903B2 (en) | 2022-04-12 |
| EP3548267A1 (en) | 2019-10-09 |
| AT519379A1 (en) | 2018-06-15 |
| AT519379B1 (en) | 2020-02-15 |
| WO2018098512A1 (en) | 2018-06-07 |
| PL3548267T3 (en) | 2023-10-09 |
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