EP3838577B1 - Method and device for pressing - Google Patents

Method and device for pressing Download PDF

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Publication number
EP3838577B1
EP3838577B1 EP20194239.8A EP20194239A EP3838577B1 EP 3838577 B1 EP3838577 B1 EP 3838577B1 EP 20194239 A EP20194239 A EP 20194239A EP 3838577 B1 EP3838577 B1 EP 3838577B1
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EP
European Patent Office
Prior art keywords
strainer
pressing
scraper
cage
extension
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.)
Active
Application number
EP20194239.8A
Other languages
German (de)
French (fr)
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EP3838577C0 (en
EP3838577A1 (en
Inventor
Martin Fuhrmann
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.)
Harburg Freudenberger Maschinenbau GmbH
Original Assignee
Harburg Freudenberger Maschinenbau GmbH
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Publication of EP3838577A1 publication Critical patent/EP3838577A1/en
Application granted granted Critical
Publication of EP3838577C0 publication Critical patent/EP3838577C0/en
Publication of EP3838577B1 publication Critical patent/EP3838577B1/en
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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
    • B30B9/16—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
    • 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
    • B30B9/267—Strainer bars; Spacers
    • 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
    • B30B9/26—Permeable casings or strainers

Definitions

  • the invention relates to a device for pressing comprising a strainer basket in which at least two pressing and conveying screws arranged one behind the other are rotatable on a screw shaft.
  • the invention relates to a method for pressing in which a material to be pressed is pressed by means of a pressing device.
  • the pressing chamber which is also called the strainer chamber or pressing chamber, is at least partially geometrically delimited by at least one so-called strainer rod basket.
  • the strainer rod baskets are often designed in a cylindrical or hollow cylindrical geometry and are divided into individual strainer rod fields or strainer fields for receiving and/or holding strainer rods.
  • Strainer rods or strainer rod baskets of the type mentioned above are used in the field of devices for pressing flowable or liquid substances from materials or products introduced into the device. For example, pressing of liquid substances from animal carcasses, slaughterhouse waste or oily fruits, seeds or plants.
  • the devices for pressing are designed like drums and the strainer rods extend in a longitudinal direction of the drum.
  • the substances to be processed are also transported in this longitudinal direction. In the area of a drum outlet, the residual substances are discharged from the drum interior almost free of moisture. Transport through the drum takes place using a pressure and transport screw.
  • the liquids contained in the input substances are pressed out by the pressing process between the boundary surfaces of the screw flights of the transport screw and the strainer rods.
  • the strainer rods are arranged with gap-like distances relative to one another. To ensure that the pressing process runs smoothly, the cross-sectional area of the screw flight decreases from the inlet towards the outlet.
  • the primary goal of the pressing process is to separate as completely as possible the flowable and particularly oily components and solid components from the material to be pressed. Another goal is to achieve the highest possible material volume flow. Both goals are achieved in the best possible way by designing the machine elements for applying the pressing forces with maximum performance and by designing the pressing chamber geometrically in an appropriate manner.
  • the liquid and solid components of the material to be pressed can only be separated to a certain extent, since part of the material to be pressed moves exclusively close to the screw shaft inside the pressing chamber.
  • the liquid components of this material to be pressed close to the shaft cannot escape from the pressing chamber through the external openings of the strainer basket and are discharged from the pressing chamber with the press residues that are partially separated from the liquid components.
  • An object of the invention is to provide a device for pressing of the type mentioned in the introduction, which is improved with regard to the efficiency of the separation of liquid and solid components of the material to be pressed.
  • a further object of the invention is to provide an improved method for pressing of the type mentioned in the introduction.
  • a pressing device has a pressing chamber delimited by a hollow cylindrical strainer basket, in which at least two conveyor screws can rotate one behind the other on a common screw shaft.
  • the strainer basket has openings through which liquid pressed out of the material to be pressed can be drained out of the pressing chamber.
  • the strainer basket is held in a strainer frame.
  • a pressure zone is arranged between each of the conveyor screws of the pressing device.
  • the pressure zone is free of screw threads of the conveyor screws.
  • a conical element is arranged on the screw shaft in the region of the pressure zone between the adjacent conveyor screws, wherein the diameter of the cone increases in the conveying direction.
  • the conveyor screws have a hollow cylindrical base body that sits firmly on the screw shaft.
  • the screw flight of the respective conveyor screw is limited by a spiral-shaped wall element or the screw blades.
  • the diameter of the hollow cylindrical base body of two consecutive conveyor screws is larger in the second conveyor screw arranged behind the first conveyor screw in the conveying direction than in the first conveyor screw.
  • the conical element arranged between two conveyor screws further has diameters at its ends adapted to the base body of the immediately adjacent conveyor screw.
  • the cone element is designed as a circular truncated cone.
  • a plurality of scraper bowls are arranged in the at least one pressure zone of the pressing device.
  • Each of the scraper bowls has a nose-like extension which, when the scraper bowl is assembled, protrudes from a base bar of the scraper bowl inwards out of the strainer basket into the pressing chamber.
  • the scraper bowls are evenly distributed along the circumference of the strainer basket in the pressure zone.
  • the strainer basket has a plurality of strainer rods arranged next to one another in strainer fields, which are spaced apart from one another are arranged so that a liquid pressed out of a material to be pressed can be discharged from the pressing chamber through the gaps between the strainer bars.
  • the scraper bowls are arranged in the strainer fields between the strainer bars of the strainer basket in the region of a pressure zone.
  • a strainer basket section has two strainer fields in which the strainer rods are arranged next to one another.
  • the strainer fields of a strainer basket section are limited by the clamping strips and/or scrapers that fix the strainer rods of the respective strainer field in the associated strainer basket segment.
  • at least one scraper bowl is arranged between the strainer rods of the respective strainer field for each strainer field.
  • two scraper bowls are arranged between the strainer bars of the respective strainer field.
  • three scraper bowls are arranged between the strainer bars of the respective strainer field.
  • the scraper bowls have the same length as the strainer rods used in the respective strainer field.
  • the base bar of a strainer bowl is wider than the strainer rods used in the respective strainer field.
  • the width of the scraper bowl is chosen to be large enough to counteract or prevent sideways tipping.
  • the internal pressure during pressing ensures that the scraper bowl is pressed onto its support surface in the strainer basket.
  • the scraper bowl must not be too wide, as there must still be sufficient space in the entire strainer field for strainer rods with gaps in order to ensure adequate separation of the solids and liquid(s) of the material to be pressed during pressing.
  • the shape of the base bar of a strainer bowl is adapted to the contour of the strainer basket.
  • the base bar of a scraper bowl is curved in the transverse direction so that the outside of the scraper bowl forms a segment of a cylinder surface or the base bar forms a hollow cylinder segment.
  • the scraper bowls are made of a hardened metal.
  • the extension of a scraper bowl is designed like a web.
  • the contour of the extension of the scraper bowl is adapted to the contour of the conveying device in the area of the pressure zone.
  • the height of the extension in the sense of how far the extension protrudes into the pressing chamber, is adapted to the contour of the conveying device in the longitudinal direction of the extension.
  • the longitudinal direction of the extension is aligned in the conveying direction of the conveyor screw.
  • the height of the extension decreases in the longitudinal direction.
  • the length of the extension is defined by the length of the respective pressure zone.
  • the pressure zone can vary in its length, diameter (and therefore distance from the interior of the strainer basket) and contour depending on the design of a strainer press.
  • the extensions cannot be longer than the total length of the respective pressure zone.
  • the width of the extension depends on the desired effect to be achieved in terms of material mixing or swirling when the material to be pressed hits this front surface of the extension in the direction of flow.
  • the material of the pressed material can be guided using the scraper bowls, which prevents the material from rotating in the pressing device. This ensures that the material is continuously fed into the pressing device and that the material is continuously transported in the pressing device.
  • the material of the pressed material can not only be stabilized with the help of the scraper bowls, but can also be held back. Due to the large surface area when the material hits the scraper bowl or bowls, a material jam can be created, which increases the pressing pressure of the pressing device. Despite this, the material throughput remains the same, only the power consumption of the screw motor increases with the same conveying capacity.
  • the scraper bowls arranged between the end of the screw thread of a first screw and the beginning of the screw thread of a second screw can be used to achieve improved turbulence of the material being pressed.
  • the material jam that can be created can be broken using the respective screw threads, so that the material can be forced to change position.
  • a method for pressing according to the invention is characterized in one embodiment in that the material to be pressed is conveyed into the area of a pressure zone by means of a first conveyor screw and that the material to be pressed is mixed and/or guided and/or held in the pressure zone by means of a plurality of scraper bowls and that the material to be pressed is further conveyed in the conveying direction behind the pressure zone by means of a second conveyor screw, wherein a device for pressing according to the invention is used.
  • FIG 1 shows a perspective view of a scraper bowl (10) of a device for pressing (1) according to the invention.
  • the scraper bowl (10) has a base strip (11) which is adapted to the contour of a strainer basket (2).
  • the base strip (11) of the scraper bowl (10) is curved in the transverse direction so that it is designed approximately as a hollow cylinder segment.
  • On the inside of the scraper bowl (10) there is an extension (12) approximately in the middle which protrudes from the base strip (11).
  • the extension (12) is designed like a web and the height of the extension (12) decreases continuously in one direction.
  • Figure 2 shows a perspective view of the strainer field of a strainer basket section (3) of a device for pressing (1) according to the invention.
  • the strainer field is divided into two strainer field segments, each of which is formed from a plurality of strainer rods (5) arranged next to one another. Gaps are formed between the strainer rods (5).
  • three scraper bowls (10) are arranged, which are arranged evenly spaced from one another in the respective strainer field segment.
  • the extensions (12) of the scraper bowls (10) protrude inwards from the strainer field formed by the strainer rods (5) and the base strips (11) of the scraper bowls (10) into the strainer basket section (3) formed from the strainer field segments and the strainer frame (6) not shown in this view.
  • the strainer rods (5) have an armoring (5a) on their inside to reduce wear.
  • FIG 3 is a perspective view of a section of an embodiment of a device for pressing (1) according to the invention in the area of the opened and only partially loaded strainer basket (2).
  • the strainer basket segments (4) shown are arranged in a strainer frame (6).
  • fastening means (9) for fastening clamping strips (9) (not shown) for fixing the strainer rods (5) and/or scraper bowls (10) in the respective strainer basket segment (4) are arranged in the strainer frame (6).
  • Figure 4 shows a view of a section of an embodiment of a device for pressing (1) according to the invention with an open strainer basket (2) in the area of a scraper bowl (10).
  • the strainer basket (2) there are two conveyor screws (13a, 13b) arranged one behind the other on a common screw shaft.
  • a cone element (15) is arranged between the first conveyor screw (13a) and the second conveyor screw (13b).
  • the conveyor screws (13a, 13b) each have a hollow cylindrical base body on which at least one screw blade (14) is arranged.
  • the screw flight of the respective conveyor screw (13a, 13b) is limited by the at least one screw blade (14).
  • the base body of the first conveyor screw (13a) has a smaller diameter than the base body of the second conveyor screw (13b).
  • the conical element (15) creates an approximately continuous transition from the diameter of the base body of the first conveyor screw (13a) to the diameter of the base body of the second conveyor screw (13b).
  • the screw wing (14) and thus the screw flight of the first conveyor screw (13a) ends in the conveying direction at a short distance in front of the extension (12) of the scraper bowl (10).
  • No screw wing (14) is arranged in the area of the conical element (15).
  • the screw wing (14) and thus the screw flight of the second conveyor screw (13b) begins at a distance in the conveying direction behind the end of the extension (12) of the scraper bowl (10).
  • strainer rods (5) and scraper bowls (10) of the strainer basket segment (4) are fixed in the strainer basket segment (4) by means of clamping strips (8).
  • a pressure area of the pressing device (1) is formed, in which the scraper bowls (10) are also arranged.
  • FIG. 5 a cross-section of an embodiment of a scraper bowl (10) according to the invention is shown.
  • the underside and the top side of the base strip (11) of the scraper bowl (10) are curved along circular segments.
  • the underside of the base strip (11) of the scraper bowl (10) is curved along a circular segment of a first circle with the diameter A and the top side of the base strip (11) of the scraper bowl (10) is curved along a circular segment of a second circle with the diameter B.
  • the top side of the extension (12) of the scraper bowl (10) is also curved along a circular segment curved, using the circular segment of a third circle with diameter C.
  • the previously mentioned sides are each designed like cylinder wall segments.
  • the scraper bowl (10) has a width a in the region of the upper side of the base bar (11) and a width b in the region of the upper side of the extension (12).
  • the base bar (11) of the scraper bowl (10) extends in a first lateral direction along the circular segment of the first circle in an angular range I and in the opposite second lateral direction in an angular range II.
  • the angular range I and the angular range II differ from one another. In one embodiment of the invention, one angular range is larger than the other angular range.
  • the scraper bowl (10) has an armouring (16) on the upper side of the extension (12).
  • FIG. 6 shows a section of a scraper bowl (10) according to the invention in the longitudinal direction.
  • the scraper bowl (10) has the length c.
  • On the top of the base strip (11) an armoring (16) is arranged around the extension (12).
  • the extension (12) has the length d and is arranged at the distance e from a first end of the scraper bowl (10).
  • the extension (12) has a height that decreases in the longitudinal direction of the scraper bowl (10).
  • the top of the extension (12) is arranged at an angle III to the extension of the side wall of the extension (12). At the highest point, the scraper bowl (10) has the height f.
  • the absolute dimensioning of the individual parameters of the scraper bowls (10) depends on the design of the entire strainer basket. In particular, the desired number and width of the gaps, the throughput of pressed material through the entire press, the degree of pressing of the liquid components out of the pressed material and the acceptable energy input for the pressing process all play a role.
  • the width a of the scraper bowl (10) is 30 mm to 80 mm. In a preferred embodiment, 45 mm to 65 mm.
  • the height f of the scraper bowl (10) is 30 mm to 60 mm. In a preferred embodiment, 40 mm to 50 mm.
  • the width b of the extension (12) of the scraper bowl (10) is 10 mm to 40 mm. In a preferred embodiment of the invention, 20 mm to 30 mm.
  • the length d of the extension (12) of the scraper bowl (10) is 40 mm to 80 mm. In a preferred embodiment, 50 mm to 70 mm.
  • the angle range I and the angle range II are each between 5° and 15°.
  • the angle III is adapted to the contour of the cone segment in the respective pressure range of the pressing device. In one embodiment of the invention, the angle III is 80° to 89°. In a preferred embodiment of the invention, the angle III is 84° to 88°.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Sludge (AREA)
  • Filtration Of Liquid (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Pressen aufweisend einen Seiherkorb, in dem mindestens zwei hintereinander angeordnete Press- und Förderschnecken auf einer Schneckenwelle rotierbar sind.The invention relates to a device for pressing comprising a strainer basket in which at least two pressing and conveying screws arranged one behind the other are rotatable on a screw shaft.

Darüber hinaus betrifft die Erfindung ein Verfahren zum Pressen, bei dem ein Pressgut mithilfe einer Vorrichtung zum Pressen gepresst wird.Furthermore, the invention relates to a method for pressing in which a material to be pressed is pressed by means of a pressing device.

Aus dem Stand der Technik sind verschiedene Pressvorrichtungen bekannt, um fließfähige, flüssige oder thixotrope Bestandteile aus verschiedenen Substanzen, Festkörpern, organischen oder anorganischen Materialien durch Pressvorgänge zu separieren. Insbesondere für pflanzliche Produkte haben sich zur Separation von Flüssigkeiten und vor allem ölhaltigen Bestandteilen sogenannte Seiher-Schneckenpressen bewährt, in deren Pressraum erhebliche Presskräfte und Pressdrücke auf das Pressgut bzw. auf das die ölhaltigen Bestandteile beinhaltende Komprimat einwirken.Various pressing devices are known from the state of the art for separating free-flowing, liquid or thixotropic components from various substances, solids, organic or inorganic materials by means of pressing processes. So-called strainer screw presses have proven to be particularly effective for separating liquids and, above all, oil-containing components for plant products. In the pressing chamber of these, considerable pressing forces and pressures act on the material to be pressed or on the compressed product containing the oil-containing components.

Der Pressraum, welcher auch Seiherkammer oder Presskammer genannt wird, ist wenigstens teilweise durch mindestens einen sogenannten Seiherstabkorb geometrisch begrenzt. Häufig sind die Seiherstabkörbe in zylindrischer bzw. hohlzylindrischer Geometrie ausgeführt und in einzelne Seiherstabfelder bzw. Seiherfelder zur Aufnahme und/oder Halterung von Seiherstäben unterteilt.The pressing chamber, which is also called the strainer chamber or pressing chamber, is at least partially geometrically delimited by at least one so-called strainer rod basket. The strainer rod baskets are often designed in a cylindrical or hollow cylindrical geometry and are divided into individual strainer rod fields or strainer fields for receiving and/or holding strainer rods.

Seiherstäbe bzw. Seiherstabkörbe der einleitend genannten Art werden im Bereich von Vorrichtungen zum Abpressen von fließfähigen bzw. flüssigen Stoffen aus in die Vorrichtung eingebrachten Materialien oder Produkten verwendet. Es kann beispielsweise ein Abpressen von flüssigen Stoffen aus Tierkadavern, Schlachtabfällen oder ölhaltigen Früchten, Saaten oder Pflanzen erfolgen. Die Vorrichtungen zum Abpressen sind trommelartig ausgebildet und die Seiherstäbe erstrecken sich in einer Längsrichtung der Trommel. In dieser Längsrichtung erfolgt auch ein Transport der zu verarbeitenden Substanzen. Im Bereich eines Trommelausganges werden die Restsubstanzen nahezu feuchtigkeitsfrei aus dem Trommelinnenraum ausgetragen. Ein Transport durch die Trommel hindurch erfolgt unter Verwendung einer Druck- und Transportschnecke.Strainer rods or strainer rod baskets of the type mentioned above are used in the field of devices for pressing flowable or liquid substances from materials or products introduced into the device. For example, pressing of liquid substances from animal carcasses, slaughterhouse waste or oily fruits, seeds or plants. The devices for pressing are designed like drums and the strainer rods extend in a longitudinal direction of the drum. The substances to be processed are also transported in this longitudinal direction. In the area of a drum outlet, the residual substances are discharged from the drum interior almost free of moisture. Transport through the drum takes place using a pressure and transport screw.

Während des Transportes der Substanzen durch den Seiherkorb hindurch, erfolgt durch den Pressvorgang zwischen den Begrenzungsflächen der Schneckengänge der Transportschnecke und den Seiherstäben ein Abpressen der in den Eingangssubstanzen enthaltenen Flüssigkeiten. Zur Ermöglichung eines Abfließens der ausgepressten fließfähigen Bestandteile, sind die Seiherstäbe mit spaltartigen Abständen relativ zueinander angeordnet. Zur Gewährleistung eines optimalen Verlaufes des Abpressvorganges verkleinert sich die Querschnittfläche des Schneckenganges ausgehend vom Einlass in Richtung des Auslasses.As the substances are transported through the strainer basket, the liquids contained in the input substances are pressed out by the pressing process between the boundary surfaces of the screw flights of the transport screw and the strainer rods. To enable the pressed-out, free-flowing components to flow out, the strainer rods are arranged with gap-like distances relative to one another. To ensure that the pressing process runs smoothly, the cross-sectional area of the screw flight decreases from the inlet towards the outlet.

Vorrangiges Ziel des Pressvorganges ist eine möglichst vollständige Separation von fließfähigen und insbesondere ölhaltigen Bestandteilen und festen Bestandteilen aus dem Pressgut. Weiterhin wird das Ziel eines möglichst hohen Stoffvolumenstromes angestrebt. Beide Zielsetzungen werden in möglichst optimaler Weise angestrebt dadurch, dass die Maschinenelemente zur Aufbringung der Presskräfte mit maximaler Leistung konstruiert werden und der Pressraum in geeigneter Weise geometrisch ausgelegt wird.The primary goal of the pressing process is to separate as completely as possible the flowable and particularly oily components and solid components from the material to be pressed. Another goal is to achieve the highest possible material volume flow. Both goals are achieved in the best possible way by designing the machine elements for applying the pressing forces with maximum performance and by designing the pressing chamber geometrically in an appropriate manner.

Wird das Pressgut mithilfe nur einer Förderschnecke durch einen gleichmäßig gestalteten Pressraum gefördert, ist eine Separation der flüssigen und festen Bestandteile des Pressgutes nur zu einem gewissen Grad möglich, da sich ein Teil des Pressgutes ausschließlich nahe der Schneckenwelle im Inneren des Pressraumes bewegt. Die flüssigen Bestandteile dieses wellennahen Pressgutes können dadurch nicht durch die außenliegenden Öffnungen des Seiherkorbes aus dem Pressraum entweichen und werden mit dem teilweise von den flüssigen Bestandteilen separierten Pressrückständen aus dem Pressraum abgeführt.If the material to be pressed is conveyed through a uniformly designed pressing chamber using only one conveyor screw, the liquid and solid components of the material to be pressed can only be separated to a certain extent, since part of the material to be pressed moves exclusively close to the screw shaft inside the pressing chamber. The liquid components of this material to be pressed close to the shaft cannot escape from the pressing chamber through the external openings of the strainer basket and are discharged from the pressing chamber with the press residues that are partially separated from the liquid components.

Gemäß dem Stand der Technik ist es bereits bekannt, auf einer gemeinsamen Schneckenwelle mehrere Förderschnecken hintereinander anzuordnen. Dabei wird das Pressgut in den Druckzonen genannten Bereichen zwischen den Schneckengängen hintereinanderliegender Schnecken in gewissem Maße verwirbelt, sodass an einer ersten Schnecke nah der Schneckenwelle transportiertes Pressgut nach außen in den Bereich der Öffnungen des Seiherkorbes gelangen kann.According to the state of the art, it is already known to arrange several conveyor screws one behind the other on a common screw shaft. In this case, the material to be pressed is swirled to a certain extent in the areas called pressure zones between the screw flights of screws arranged one behind the other, so that material to be pressed transported on a first screw close to the screw shaft can reach the outside into the area of the openings of the strainer basket.

Auch die Verwendung von Abstreicher genannten, im Bereich von zur Fixierung des Seiherstäbe verwendeten Klemmleisten aus dem Seiherkorb nach innen herausragenden Fortsätzen zur Verbesserung des Wirkungsgrades der Separation des Pressgutes in flüssige und feste Bestandteile ist bereits bekannt.The use of extensions called scrapers, which protrude inwards from the strainer basket in the area of the clamping strips used to fix the strainer rods, to improve the efficiency of the separation of the pressed material into liquid and solid components, is already known.

Die US 3191521 A sowie die US 2960926 A und die US 3276354 A zeigen bereits Vorrichtungen zum Pressen, die einen von einem Seiherkorb begrenzten Pressraum aufweisen und bei dem entlang einer Schneckenwelle Druckzonen vorgesehen sind. Darüber hinaus wird eine derartige Anordnung auch bereits in der DE 1502230 A1 gezeigt. Das Dokument US3191521A offenbart eine Vorrichtung zum Pressen mit den Merkmalen des Oberbegriffs des Anspruchs 1.The US 3191521 A as well as the US 2960926 A and the US 3276354 A already show devices for pressing which have a pressing chamber delimited by a strainer basket and in which pressure zones are provided along a screw shaft. In addition, such an arrangement is already used in the EN 1502230 A1 shown. The document US3191521A discloses a device for pressing with the features of the preamble of claim 1.

Weitere Vorrichtungen zum Pressen mit Transportschnecken zur Förderung des Pressgutes werden in der US 2149736 A , der DE 1502216 A1 sowie der US 829314 A beschrieben.Further devices for pressing with transport screws for conveying the pressed material are available in the US 2149736 A , the DE 1502216 A1 and the US 829314 A described.

Eine Aufgabe der Erfindung ist es, eine Vorrichtung zum Pressen der einleitend genannten Art anzugeben, die im Hinblick auf den Wirkungsgrad der Trennung von flüssigen und festen Bestandteilen des Pressgutes verbessert ist.An object of the invention is to provide a device for pressing of the type mentioned in the introduction, which is improved with regard to the efficiency of the separation of liquid and solid components of the material to be pressed.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung zum Pressen aufweisend die Merkmale des Patentanspruchs 1 gelöst.This object is achieved according to the invention by a device for pressing having the features of patent claim 1.

Eine weitere Aufgabe der Erfindung ist es, ein verbessertes Verfahren zum Pressen der einleitend genannten Art anzugeben.A further object of the invention is to provide an improved method for pressing of the type mentioned in the introduction.

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren aufweisend die Merkmale des Patentanspruchs 5 gelöst.This object is achieved according to the invention by a method having the features of patent claim 5.

Die im folgenden offenbarten Merkmale einer Vorrichtung zum Pressen sind sowohl einzeln als auch in allen ausführbaren Kombinationen Teil der Erfindung.The features of a device for pressing disclosed below are part of the invention both individually and in all possible combinations.

Eine erfindungsgemäße Vorrichtung zum Pressen weist einen von einem hohlzylindrischen Seiherkorb begrenzten Pressraum auf, in dem auf einer gemeinsamen Schneckenwelle mindestens zwei Förderschnecken hintereinander rotierbar sind.A pressing device according to the invention has a pressing chamber delimited by a hollow cylindrical strainer basket, in which at least two conveyor screws can rotate one behind the other on a common screw shaft.

Der Seiherkorb weist Öffnungen auf, durch die eine aus dem Pressgut abgepresste Flüssigkeit hindurch aus dem Pressraum heraus abführbar ist.The strainer basket has openings through which liquid pressed out of the material to be pressed can be drained out of the pressing chamber.

Der Seiherkorb ist in einer Ausführungsform der Erfindung in einem Seihergestell gehaltert.In one embodiment of the invention, the strainer basket is held in a strainer frame.

Zwischen den Förderschnecken der Vorrichtung zum Pressen ist in einer Ausführungsform der Erfindung jeweils eine Druckzone angeordnet. Die Druckzone ist frei von Schneckengängen der Förderschnecken.In one embodiment of the invention, a pressure zone is arranged between each of the conveyor screws of the pressing device. The pressure zone is free of screw threads of the conveyor screws.

In einer Ausführungsform der Erfindung ist im Bereich der Druckzone zwischen den jeweils benachbarten Förderschnecken ein Kegelelement auf der Schneckenwelle angeordnet, wobei der Durchmesser des Kegels in Förderrichtung zunimmt.In one embodiment of the invention, a conical element is arranged on the screw shaft in the region of the pressure zone between the adjacent conveyor screws, wherein the diameter of the cone increases in the conveying direction.

In einer Ausführungsform der Erfindung weisen die Förderschnecken einen hohlzylindrischen Grundkörper auf, der fest auf der Schneckenwelle sitzt. Auf der Mantelfläche des jeweiligen Hohlzylinders ist durch einen spiralförmig umlaufendes Wandungselement bzw. die Schneckenflügel der Schneckengang der jeweiligen Förderschnecke begrenzt.In one embodiment of the invention, the conveyor screws have a hollow cylindrical base body that sits firmly on the screw shaft. On the outer surface of the respective hollow cylinder, the screw flight of the respective conveyor screw is limited by a spiral-shaped wall element or the screw blades.

In einer Ausführungsform der Erfindung ist der Durchmesser des hohlzylindrischen Grundkörpers zweier aufeinanderfolgender Förderschnecken bei der in Förderrichtung hinter der ersten Förderschnecke angeordneten zweiten Förderschnecke größer als bei der ersten Förderschnecke.In one embodiment of the invention, the diameter of the hollow cylindrical base body of two consecutive conveyor screws is larger in the second conveyor screw arranged behind the first conveyor screw in the conveying direction than in the first conveyor screw.

In einer Ausführungsform Erfindung weist weiterhin das zwischen zwei Förderschnecken angeordnete Kegelelement an seinen Enden an den Grundkörper der jeweils unmittelbar angrenzenden Förderschnecke angepasste Durchmesser auf.In one embodiment of the invention, the conical element arranged between two conveyor screws further has diameters at its ends adapted to the base body of the immediately adjacent conveyor screw.

Das Kegelelement ist in einer bevorzugten Ausführungsform der Erfindung als ein Kreiskegelstumpf ausgebildet.In a preferred embodiment of the invention, the cone element is designed as a circular truncated cone.

Erfindungsgemäß sind in der mindestens einen Druckzone der Vorrichtung zum Pressen mehrere Abstreicherschalen angeordnet.According to the invention, a plurality of scraper bowls are arranged in the at least one pressure zone of the pressing device.

Jede der Abstreicherschalen weist einen nasenartig ausgebildeten Fortsatz auf, der in einem montierten Zustand einer Abstreicherschale aus einer Basisleiste der Abstreicherschale nach innen aus dem Seiherkorb heraus in den Pressraum ragt.Each of the scraper bowls has a nose-like extension which, when the scraper bowl is assembled, protrudes from a base bar of the scraper bowl inwards out of the strainer basket into the pressing chamber.

In einer Ausführungsform der Erfindung sind die Abstreicherschalen entlang des Umfanges des Seiherkorbes in der Druckzone gleichmäßig verteilt angeordnet.In one embodiment of the invention, the scraper bowls are evenly distributed along the circumference of the strainer basket in the pressure zone.

In einer Ausführungsform der Erfindung weist der Seiherkorb eine Mehrzahl von in Seiherfeldern nebeneinander angeordneten Seiherstäben auf, die mit einem gewissen Abstand zueinander angeordnet sind, sodass eine aus einem Pressgut abgepresste Flüssigkeit durch die zwischen den Seiherstäben befindlichen Spalte aus dem Pressraum heraus abführbar ist.In one embodiment of the invention, the strainer basket has a plurality of strainer rods arranged next to one another in strainer fields, which are spaced apart from one another are arranged so that a liquid pressed out of a material to be pressed can be discharged from the pressing chamber through the gaps between the strainer bars.

In einer bevorzugten Ausführungsform der Erfindung sind die Abstreicherschalen in den Seiherfeldern zwischen den Seiherstäben des Seiherkorbes im Bereich einer Druckzone angeordnet.In a preferred embodiment of the invention, the scraper bowls are arranged in the strainer fields between the strainer bars of the strainer basket in the region of a pressure zone.

Ist der Seiherkorb in zwei Seiherkorbhälften geteilt, so weist ein Seiherkorbabschnitt zwei Seiherfelder auf, in denen die Seiherstäbe nebeneinander angeordnet sind. Die Seiherfelder eines Seiherkorbabschnittes sind durch die Klemmleisten und/oder Abstreicher begrenzt, die die Seiherstäbe des jeweiligen Seiherfeldes im zugeordneten Seiherkorbsegment fixieren. Je Seiherfeld ist erfindungsgemäß mindestens eine Abstreicherschale zwischen den Seiherstäben des jeweiligen Seiherfeldes angeordnet.If the strainer basket is divided into two strainer basket halves, a strainer basket section has two strainer fields in which the strainer rods are arranged next to one another. The strainer fields of a strainer basket section are limited by the clamping strips and/or scrapers that fix the strainer rods of the respective strainer field in the associated strainer basket segment. According to the invention, at least one scraper bowl is arranged between the strainer rods of the respective strainer field for each strainer field.

In einer weiteren Ausführungsform der Erfindung sind zwei Abstreicherschalen zwischen den Seiherstäben des jeweiligen Seiherfeldes angeordnet.In a further embodiment of the invention, two scraper bowls are arranged between the strainer bars of the respective strainer field.

In einer weiteren Ausführungsform der Erfindung sind drei Abstreicherschalen zwischen den Seiherstäben des jeweiligen Seiherfeldes angeordnet.In a further embodiment of the invention, three scraper bowls are arranged between the strainer bars of the respective strainer field.

In einer Ausführungsform der Erfindung weisen die Abstreicherschalen die gleiche Länge wie die im jeweiligen Seiherfeld eingesetzten Seiherstäbe auf.In one embodiment of the invention, the scraper bowls have the same length as the strainer rods used in the respective strainer field.

In einer Ausführungsform der Erfindung ist die Basisleiste einer Abstreicherschale breiter ausgebildet, als die im jeweiligen Seiherfeld eingesetzten Seiherstäbe.In one embodiment of the invention, the base bar of a strainer bowl is wider than the strainer rods used in the respective strainer field.

Die Breite der Abstreicherschale ist in einer Ausführungsform der Erfindung so groß gewählt, dass diese einem seitlichen Kippen entgegenwirkt bzw. dieses verhindert. Zeitgleich sorgt auch der Innendruck beim Pressen dafür, dass die Abstreicherschale auf ihre Auflagefläche im Seiherkorb gedrückt wird. Die Abstreicherschale darf allerdings nicht zu breit ausgebildet sein, da in dem gesamten Seiherfeld noch ausreichend Platz für Seiherstäbe mit Spalten sein muss, um eine ausreichende Trennung der Feststoffe und Flüssigkeit(en) des Pressguts beim Pressen zu gewährleisten.In one embodiment of the invention, the width of the scraper bowl is chosen to be large enough to counteract or prevent sideways tipping. At the same time, the internal pressure during pressing ensures that the scraper bowl is pressed onto its support surface in the strainer basket. However, the scraper bowl must not be too wide, as there must still be sufficient space in the entire strainer field for strainer rods with gaps in order to ensure adequate separation of the solids and liquid(s) of the material to be pressed during pressing.

Nach der Erfindung ist die Form der Basisleiste einer Abstreicherschale an die Kontur des Seiherkorbes angepasst.According to the invention, the shape of the base bar of a strainer bowl is adapted to the contour of the strainer basket.

Nach der Erfindung ist die Basisleiste einer Abstreicherschale dazu in Querrichtung gewölbt, sodass die Außenseite der Abstreicherschale ein Segment einer Zylinderoberfläche bzw. die Basisleiste ein Hohlzylindersegment realisiert.According to the invention, the base bar of a scraper bowl is curved in the transverse direction so that the outside of the scraper bowl forms a segment of a cylinder surface or the base bar forms a hollow cylinder segment.

Die Abstreicherschalen sind in einer bevorzugten Ausführungsform der Erfindung aus einem gehärteten Metall gefertigt.In a preferred embodiment of the invention, the scraper bowls are made of a hardened metal.

In einer Ausführungsform der Erfindung ist der Fortsatz einer Abstreicherschale stegartig ausgebildet.In one embodiment of the invention, the extension of a scraper bowl is designed like a web.

In einer bevorzugten Ausführungsform der Erfindung ist die Kontur des Fortsatzes der Abstreicherschale an die Kontur der Fördereinrichtung im Bereich der Druckzone angepasst. Insbesondere ist die Höhe des Fortsatzes, in dem Sinne, wie weit der Fortsatz in den Pressraum hineinragt, in Längsrichtung des Fortsatzes an die Kontur der Fördereinrichtung angepasst. Die Längsrichtung des Fortsatzes ist dabei in Förderrichtung der Transportschnecke ausgerichtet.In a preferred embodiment of the invention, the contour of the extension of the scraper bowl is adapted to the contour of the conveying device in the area of the pressure zone. In particular, the height of the extension, in the sense of how far the extension protrudes into the pressing chamber, is adapted to the contour of the conveying device in the longitudinal direction of the extension. The longitudinal direction of the extension is aligned in the conveying direction of the conveyor screw.

Erfindungsgemäß nimmt die Höhe des Fortsatzes in Längsrichtung ab.According to the invention, the height of the extension decreases in the longitudinal direction.

Die Länge des Fortsatzes ist in einer vorteilhaften Ausführungsform der Erfindung durch die Länge der jeweiligen Druckzone definiert. Die Druckzone kann dabei je nach Ausführungsform einer Seiherpresse in ihrer Länge, ihrem Durchmesser (demnach Abstand zum Innerraum Seiherkorb) und ihrer Kontur variieren. Die Fortsätze können dabei nicht länger sein als die Gesamtlänge der jeweiligen Druckzone.In an advantageous embodiment of the invention, the length of the extension is defined by the length of the respective pressure zone. The pressure zone can vary in its length, diameter (and therefore distance from the interior of the strainer basket) and contour depending on the design of a strainer press. The extensions cannot be longer than the total length of the respective pressure zone.

Die Breite des Fortsatzes ist in einer Ausführungsform der Erfindung vom gewünschten zu erzielenden Effekt im Sinne der Materialvermischung bzw. -verwirbelung beim Auftreffen des Pressguts auf diese Stirnfläche des Fortsatzes in Fließrichtung abhängig.In one embodiment of the invention, the width of the extension depends on the desired effect to be achieved in terms of material mixing or swirling when the material to be pressed hits this front surface of the extension in the direction of flow.

Mithilfe der in der mindestens einen Druckzone angeordneten Abstreicherschalen sind mehrere Effekte erzielbar, die einen positiven Einfluss auf den Wirkungsgrad der Vorrichtung zum Pressen im Hinblick auf die Separation von flüssigen und festen Bestandteilen des Pressgutes haben.By means of the scraper bowls arranged in the at least one pressure zone, several effects can be achieved which have a positive influence on the efficiency of the pressing device with regard to the separation of liquid and solid components of the material to be pressed.

Zum einen ist das Material des Pressgutes mithilfe der Abstreicherschalen führbar, wodurch ein Mitdrehen des Materials in der Vorrichtung zum Pressen vermeidbar ist. Dadurch ist ein kontinuierlicher Materialeinzug in die Vorrichtung zum Pressen bzw. ein kontinuierlicher Transport des Materials in der Vorrichtung zum Pressen gewährleistbar.On the one hand, the material of the pressed material can be guided using the scraper bowls, which prevents the material from rotating in the pressing device. This ensures that the material is continuously fed into the pressing device and that the material is continuously transported in the pressing device.

Weiterhin ist das Material des Pressgutes mithilfe der Abstreicherschalen nicht nur stabilisierbar, sondern zusätzlich aufhaltbar. Durch die große Oberfläche beim Treffen des Materials auf die Abstreicherschale bzw. die Abstreicherschalen ist ein Materialstau erzeugbar, wodurch der Pressdruck der Vorrichtung zum Pressen verstärkbar ist. Der Materialdurchsatz bleibt trotz dessen gleich, lediglich die Leistungsaufnahme des Schneckenmotors erhöht sich bei gleicher Förderleistung.Furthermore, the material of the pressed material can not only be stabilized with the help of the scraper bowls, but can also be held back. Due to the large surface area when the material hits the scraper bowl or bowls, a material jam can be created, which increases the pressing pressure of the pressing device. Despite this, the material throughput remains the same, only the power consumption of the screw motor increases with the same conveying capacity.

Zum anderen ist mithilfe der zwischen dem Ende des Schneckengangs einer ersten Schnecke und dem Anfang des Schneckengangs einer zweiten Schnecke angeordneten Abstreicherschalen eine verbesserte Verwirbelung des Materials des Pressgutes erreichbar. Der erzeugbare Materialstau ist mithilfe der jeweiligen Schneckengänge brechbar, sodass das Material zu einer Positionsveränderung zwingbar ist.On the other hand, the scraper bowls arranged between the end of the screw thread of a first screw and the beginning of the screw thread of a second screw can be used to achieve improved turbulence of the material being pressed. The material jam that can be created can be broken using the respective screw threads, so that the material can be forced to change position.

Ein erfindungsgemäßes Verfahren zum Pressen, ist in einer Ausführungsform dadurch gekennzeichnet, dass das Pressgut mithilfe einer ersten Förderschnecke in den Bereich einer Druckzone befördert wird und dass das Pressgut in der Druckzone mithilfe einer Mehrzahl von Abstreicherschalen durchmischt und/oder geführt und/oder gehalten wird und dass das Pressgut in Förderrichtung hinter der Druckzone mithilfe einer zweiten Förderschnecke weiter gefördert wird, wobei eine erfindungsgemäße Vorrichtung zum Pressen verwendet ist.A method for pressing according to the invention is characterized in one embodiment in that the material to be pressed is conveyed into the area of a pressure zone by means of a first conveyor screw and that the material to be pressed is mixed and/or guided and/or held in the pressure zone by means of a plurality of scraper bowls and that the material to be pressed is further conveyed in the conveying direction behind the pressure zone by means of a second conveyor screw, wherein a device for pressing according to the invention is used.

In den folgenden Figuren sind beispielhafte Ausführungsformen der Erfindung schematisch dargestellt. Es zeigen:

Figur 1:
Eine perspektivische Darstellung einer Abstreicherschale einer erfindungsgemäßen Vorrichtung zum Pressen,
Figur 2:
Eine perspektivische Ansicht eines erfindungsgemäßen Seiherfeldes mit Abstreicherschalen,
Figur 3:
Eine perspektivische Ansicht eines Ausschnittes einer erfindungsgemäßen Vorrichtung zum Pressen im Bereich einer Seiherkorbhälfte,
Figur 4:
Eine Ansicht eines Ausschnittes einer erfindungsgemäßen Ausführungsform einer Vorrichtung zum Pressen mit geöffnetem Seiherkorb im Bereich einer Abstreicherschale,
Figur 5:
Einen Querschnitt einer erfindungsgemäßen Ausführungsform einer Abstreicherschale und
Figur 6:
Einen Schnitt erfindungsgemäßen Ausführungsform einer Abstreicherschale in Längsrichtung.
The following figures show exemplary embodiments of the invention schematically. They show:
Figure 1:
A perspective view of a scraper bowl of a pressing device according to the invention,
Figure 2:
A perspective view of a strainer field according to the invention with scraper bowls,
Figure 3:
A perspective view of a section of a device according to the invention for pressing in the area of a strainer basket half,
Figure 4:
A view of a section of an embodiment of a device for pressing according to the invention with an open strainer basket in the area of a scraper bowl,
Figure 5:
A cross section of an embodiment of a scraper bowl according to the invention and
Figure 6:
A longitudinal section of an embodiment of a scraper bowl according to the invention.

Figur 1 zeigt eine perspektivische Darstellung einer Abstreicherschale (10) einer erfindungsgemäßen Vorrichtung zum Pressen (1). Die Abstreicherschale (10) weist eine Basisleiste (11) auf, die an die Kontur eines Seiherkorbes (2) angepasst ist. Dazu ist die Basisleiste (11) der Abstreicherschale (10) in Querrichtung gewölbt, sodass diese etwa als ein Hohlzylindersegment ausgebildet ist. Auf der Innenseite der Abstreicherschale (10) ist etwa mittig ein Fortsatz (12) angeordnet, der aus der Basisleiste (11) heraus ragt. Der Fortsatz (12) ist stegartig ausgebildet und die Höhe des Fortsatzes (12) nimmt in einer Richtung stetig ab. Figure 1 shows a perspective view of a scraper bowl (10) of a device for pressing (1) according to the invention. The scraper bowl (10) has a base strip (11) which is adapted to the contour of a strainer basket (2). For this purpose, the base strip (11) of the scraper bowl (10) is curved in the transverse direction so that it is designed approximately as a hollow cylinder segment. On the inside of the scraper bowl (10) there is an extension (12) approximately in the middle which protrudes from the base strip (11). The extension (12) is designed like a web and the height of the extension (12) decreases continuously in one direction.

Figur 2 zeigt eine perspektivische Darstellung des Seiherfeldes eines Seiherkorbabschnittes (3) einer erfindungsgemäßen Vorrichtung zum Pressen (1). Das Seiherfeld ist in zwei Seiherfeldsegmente gegliedert, die jeweils aus einer Mehrzahl von nebeneinander angeordneten Seiherstäben (5) gebildet sind. Zwischen den Seiherstäben (5) sind jeweils Spalte ausgebildet. In jedem der Seiherfeldsegmente sind jeweils drei Abstreicherschalen (10) angeordnet, die im jeweiligen Seiherfeldsegment gleichmäßig voneinander beabstandet angeordnet sind. Die Fortsätze (12) der Abstreicherschalen (10) ragen aus dem durch die Seiherstäbe (5) und die Basisleisten (11) der Abstreicherschalen (10) gebildeten Seiherfeld nach innen in den aus den Seiherfeldsegmenten und dem in dieser Darstellung nicht gezeigten Seihergestell (6) gebildeten Seiherkorbabschnitt (3) hinein. Die Seiherstäbe (5) weisen an ihrer Innenseite eine Panzerung (5a) zur Verringerung des Verschleißes auf. Figure 2 shows a perspective view of the strainer field of a strainer basket section (3) of a device for pressing (1) according to the invention. The strainer field is divided into two strainer field segments, each of which is formed from a plurality of strainer rods (5) arranged next to one another. Gaps are formed between the strainer rods (5). In each of the strainer field segments, three scraper bowls (10) are arranged, which are arranged evenly spaced from one another in the respective strainer field segment. The extensions (12) of the scraper bowls (10) protrude inwards from the strainer field formed by the strainer rods (5) and the base strips (11) of the scraper bowls (10) into the strainer basket section (3) formed from the strainer field segments and the strainer frame (6) not shown in this view. The strainer rods (5) have an armoring (5a) on their inside to reduce wear.

In Figur 3 ist eine perspektivische Ansicht eines Ausschnittes einer erfindungsgemäßen Ausführungsform einer Vorrichtung zum Pressen (1) im Bereich des geöffneten und nur teilweise bestückten Seiherkorbes (2) dargestellt. Die dargestellten Seiherkorbsegmente (4) sind in einem Seihergestell (6) angeordnet. Neben dem auf der rechten Seite des Seihergestells (6) angeordneten Seiherkorbabschnitt (4) ist ein geteilter Seiherring (7) angeordnet, der eine Änderung des Durchmessers des Seihergestells (6) ausgleicht, sodass in Förderrichtung eine stetige Verringerung des Durchmessers des Pressraumen im Bereich des geteilten Seiherrings (7) realisiert ist. Etwa in der Mitte des Seihergestells (6) ist ein Seiherkorbsegment (4) mit drei in das Seiherfeld eingesetzten Abstreicherschalen (10) dargestellt. Neben den Seiherkorbsegmenten (4) sind im Seihergestell (6) Befestigungsmittel (9) zur Befestigung von nicht dargestellten Klemmleisten (9) zur Fixierung der Seiherstäbe (5) und/oder Abstreicherschalen (10) im jeweiligen Seiherkorbsegment (4) angeordnet.In Figure 3 is a perspective view of a section of an embodiment of a device for pressing (1) according to the invention in the area of the opened and only partially loaded strainer basket (2). The strainer basket segments (4) shown are arranged in a strainer frame (6). Next to the strainer basket section (4) arranged on the right side of the strainer frame (6) there is a split strainer ring (7) which compensates for a change in the diameter of the strainer frame (6) so that a constant reduction in the diameter of the pressing chamber in the area of the split strainer ring occurs in the conveying direction. (7) is realized. Approximately in the middle of the strainer frame (6) there is a strainer basket segment (4) with three scraper bowls (10) inserted into the strainer field. In addition to the strainer basket segments (4), fastening means (9) for fastening clamping strips (9) (not shown) for fixing the strainer rods (5) and/or scraper bowls (10) in the respective strainer basket segment (4) are arranged in the strainer frame (6).

Figur 4 zeigt eine Ansicht eines Ausschnittes einer erfindungsgemäßen Ausführungsform einer Vorrichtung zum Pressen (1) mit geöffnetem Seiherkorb (2) im Bereich einer Abstreicherschale (10). Im Seiherkorb (2) sind zwei hintereinander auf einer gemeinsamen Schneckenwelle angeordnete Förderschnecken (13a, 13b) angeordnet. Zwischen der ersten Förderschnecke (13a) und der zweiten Förderschnecke (13b) ist ein Kegelelement (15) angeordnet. Die Förderschnecken (13a, 13b) weisen jeweils einen hohlzylindrischen Grundkörper auf, auf dem jeweils mindestens ein Schneckenflügel (14) angeordnet ist. Durch den mindestens einen Schneckenflügel (14) wird der Schneckengang der jeweiligen Förderschnecke (13a, 13b) begrenzt. Der Grundkörper der ersten Förderschnecke (13a) weist einen geringeren Durchmesser auf, als der Grundkörper der zweiten Förderschnecke (13b). Das Kegelelement (15) realisiert einen etwa stetigen Übergang vom Durchmesser des Grundkörpers der ersten Förderschnecke (13a) zum Durchmesser des Grundkörpers der zweiten Förderschnecke (13b). Der Schneckenflügel (14) und damit der Schneckengang der ersten Förderschnecke (13a) endet in Förderrichtung mit einem geringen Abstand vor dem Fortsatz (12) der Abstreicherschale (10). Im Bereich des Kegelelements (15) ist kein Schneckenflügel (14) angeordnet. In einem Abstand in Förderrichtung hinter dem Ende des Fortsatzes (12) der Abstreicherschale (10) beginnt der Schneckenflügel (14) und damit der Schneckengang der zweiten Förderschnecke (13b). Figure 4 shows a view of a section of an embodiment of a device for pressing (1) according to the invention with an open strainer basket (2) in the area of a scraper bowl (10). In the strainer basket (2) there are two conveyor screws (13a, 13b) arranged one behind the other on a common screw shaft. A cone element (15) is arranged between the first conveyor screw (13a) and the second conveyor screw (13b). The conveyor screws (13a, 13b) each have a hollow cylindrical base body on which at least one screw blade (14) is arranged. The screw flight of the respective conveyor screw (13a, 13b) is limited by the at least one screw blade (14). The base body of the first conveyor screw (13a) has a smaller diameter than the base body of the second conveyor screw (13b). The conical element (15) creates an approximately continuous transition from the diameter of the base body of the first conveyor screw (13a) to the diameter of the base body of the second conveyor screw (13b). The screw wing (14) and thus the screw flight of the first conveyor screw (13a) ends in the conveying direction at a short distance in front of the extension (12) of the scraper bowl (10). No screw wing (14) is arranged in the area of the conical element (15). The screw wing (14) and thus the screw flight of the second conveyor screw (13b) begins at a distance in the conveying direction behind the end of the extension (12) of the scraper bowl (10).

Die Seiherstäbe (5) und Abstreicherschalen (10) des Seiherkorbsegments (4) sind mithilfe von Klemmleisten (8) im Seiherkorbsegment (4) fixiert.The strainer rods (5) and scraper bowls (10) of the strainer basket segment (4) are fixed in the strainer basket segment (4) by means of clamping strips (8).

Im Bereich des Kegelelementes (15) ist ein Druckbereich der Vorrichtung zum Pressen (1) ausgebildet, in dem auch die Abstreicherschalen (10) angeordnet sind.In the area of the cone element (15) a pressure area of the pressing device (1) is formed, in which the scraper bowls (10) are also arranged.

In Figur 5 ist ein Querschnitt einer erfindungsgemäßen Ausführungsform einer Abstreicherschale (10) dargestellt. Die Unterseite und die Oberseite der Basisleiste (11) der Abstreicherschale (10) sind entlang von Kreissegmenten gewölbt. Die Unterseite der Basisleiste (11) der Abstreicherschale (10) ist entlang eines Kreissegments eines ersten Kreises mit dem Durchmesser A gewölbt und die Oberseite der Basisleiste (11) der Abstreicherschale (10) ist entlang eines Kreissegments eines zweiten Kreises mit dem Durchmesser B gewölbt. Auch die Oberseite des Fortsatzes (12) der Abstreicherschale (10) ist entlang eines Kreissegmentes gewölbt, wobei hierbei das Kreissegment eines dritten Kreises mit dem Durchmesser C verwendet ist. In dreidimensionaler Betrachtung mit den entsprechenden Längen sind die zuvor genannten Seiten jeweils zylinderwandsegmentartig ausgebildet.In Figure 5 a cross-section of an embodiment of a scraper bowl (10) according to the invention is shown. The underside and the top side of the base strip (11) of the scraper bowl (10) are curved along circular segments. The underside of the base strip (11) of the scraper bowl (10) is curved along a circular segment of a first circle with the diameter A and the top side of the base strip (11) of the scraper bowl (10) is curved along a circular segment of a second circle with the diameter B. The top side of the extension (12) of the scraper bowl (10) is also curved along a circular segment curved, using the circular segment of a third circle with diameter C. In three-dimensional view with the corresponding lengths, the previously mentioned sides are each designed like cylinder wall segments.

Die Abstreicherschale (10) weist im Bereich der Oberseite der Basisleiste (11) eine Breite a und im Bereich der Oberseite des Fortsatzes (12) eine Breite b auf.The scraper bowl (10) has a width a in the region of the upper side of the base bar (11) and a width b in the region of the upper side of the extension (12).

In Relation zur Mittelachse X-X` erstreckt sich die Basisleiste (11) der Abstreicherschale (10) in einer ersten seitlichen Richtung entlang des Kreissegments des ersten Kreises in einem Winkelbereich I und in der entgegengesetzten zweiten seitlichen Richtung in einem Winkelbereich II.In relation to the central axis X-X`, the base bar (11) of the scraper bowl (10) extends in a first lateral direction along the circular segment of the first circle in an angular range I and in the opposite second lateral direction in an angular range II.

In einer Ausführungsform der Erfindung weichen der Winkelbereich I und der Winkelbereich II voneinander ab. In einer Ausführungsform der Erfindung ist ein Winkelbereich größer als der andere Winkelbereich.In one embodiment of the invention, the angular range I and the angular range II differ from one another. In one embodiment of the invention, one angular range is larger than the other angular range.

Die Abstreicherschale (10) weist an der Oberseite des Fortsatzes (12) eine Panzerung (16) auf.The scraper bowl (10) has an armouring (16) on the upper side of the extension (12).

Figur 6 zeigt einen Schnitt einer erfindungsgemäßen Abstreicherschale (10) in Längsrichtung. Die Abstreicherschale (10) weist die Länge c auf. Auf der Oberseite der Basisleiste (11) ist um den Fortsatz (12) herum eine Panzerung (16) angeordnet. Der Fortsatz (12) hat die Länge d und ist in dem Abstand e von einem ersten Ende der Abstreicherschale (10) angeordnet. Der Fortsatz (12) weist eine in Längsrichtung der Abstreicherschale (10) abnehmende Höhe auf. Die Oberseite des Fortsatzes (12) ist dabei in einem Winkel III zur Verlängerung der Seitenwand des Fortsatzes (12) angeordnet. An der höchsten Stelle hat die Abstreicherschale (10) die Höhe f. Figure 6 shows a section of a scraper bowl (10) according to the invention in the longitudinal direction. The scraper bowl (10) has the length c. On the top of the base strip (11) an armoring (16) is arranged around the extension (12). The extension (12) has the length d and is arranged at the distance e from a first end of the scraper bowl (10). The extension (12) has a height that decreases in the longitudinal direction of the scraper bowl (10). The top of the extension (12) is arranged at an angle III to the extension of the side wall of the extension (12). At the highest point, the scraper bowl (10) has the height f.

Die absolute Dimensionierung der einzelnen Parameter der Abstreicherschalen (10) hängt von der Auslegung des gesamten Seiherkorbes ab. Insbesondere fließen die gewünschte Anzahl und Breite der Spalte, der Durchsatz von Pressgut durch die gesamte Presse, der Grad der Abpressung der flüssigen Bestandteile aus dem Pressgut und der für den Pressvorgang akzeptable Energieeinsatz eine Rolle.The absolute dimensioning of the individual parameters of the scraper bowls (10) depends on the design of the entire strainer basket. In particular, the desired number and width of the gaps, the throughput of pressed material through the entire press, the degree of pressing of the liquid components out of the pressed material and the acceptable energy input for the pressing process all play a role.

Die im folgenden genannten Maße von erfindungsgemäßen Ausführungsformen erfindungsgemäßer Abstreicherschalen (10) beziehen sich nicht auf einzelne der zuvor genannten Ausführungsbeispiele, sondern auf die Gesamtheit der erfindungsgemäßen Ausführungsformen der Abstreicherschale (10).The dimensions of embodiments of scraper bowls (10) according to the invention mentioned below do not refer to individual ones of the previously mentioned embodiments, but to the entirety of the embodiments of the scraper bowl (10) according to the invention.

In einer Ausführungsform der Erfindung beträgt die Breite a der Abstreicherschale (10) 30 mm bis 80 mm. In einer bevorzugten Ausführungsform 45 mm bis 65 mm.In one embodiment of the invention, the width a of the scraper bowl (10) is 30 mm to 80 mm. In a preferred embodiment, 45 mm to 65 mm.

In einer Ausführungsform der Erfindung beträgt die Höhe f der Abstreicherschale (10) 30 mm bis 60 mm. In einer bevorzugten Ausführungsform 40 mm bis 50 mm.In one embodiment of the invention, the height f of the scraper bowl (10) is 30 mm to 60 mm. In a preferred embodiment, 40 mm to 50 mm.

In einer Ausführungsform der Erfindung beträgt die Breite b des Fortsatzes (12) der Abstreicherschale (10) 10 mm bis 40 mm. In einer bevorzugten Ausführungsform der Erfindung 20 mm bis 30 mm.In one embodiment of the invention, the width b of the extension (12) of the scraper bowl (10) is 10 mm to 40 mm. In a preferred embodiment of the invention, 20 mm to 30 mm.

In einer Ausführungsform der Erfindung beträgt die Länge d des Fortsatzes (12) der Abstreicherschale (10) 40 mm bis 80 mm. In einer bevorzugten Ausführungsform 50 mm bis 70 mm.In one embodiment of the invention, the length d of the extension (12) of the scraper bowl (10) is 40 mm to 80 mm. In a preferred embodiment, 50 mm to 70 mm.

Der Winkelbereich I und der Winkelbereich II liegen in einer Ausführungsform der Erfindung jeweils zwischen 5° und 15°.In one embodiment of the invention, the angle range I and the angle range II are each between 5° and 15°.

Der Winkel III ist an die Kontur des Kegelsegments im jeweiligen Druckbereich der Vorrichtung zum Pressen angepasst. In einer Ausführungsform der Erfindung beträgt der Winkel III 80° bis 89°. In einer bevorzugten Ausführungsform der Erfindung beträgt der Winkel III 84° bis 88°.The angle III is adapted to the contour of the cone segment in the respective pressure range of the pressing device. In one embodiment of the invention, the angle III is 80° to 89°. In a preferred embodiment of the invention, the angle III is 84° to 88°.

Claims (5)

  1. Pressing apparatus (1) having a pressing chamber, which is delimited by at least one strainer cage (2), and having at least two conveying screws (13a, 13b), which are arranged one behind the other on a common screw shaft, the strainer cage having at least one cage zone with cage bars (5), each of the conveying screws (13a, 13b) having a screw thread, wherein a respective pressure zone is arranged between the conveying screws (13a, 13b), and in which, in at least one pressure zone, at least one scraper shell (10) is arranged between the cage bars (5) of a cage zone, wherein each of the scraper shells (10) has at least one extension (12) which projects into the pressing chamber, wherein the scraper shells (10) have a base strip (11) and the extension (12), which projects from the base strip (11), characterized in that the base strip (11) of a scraper shell (10) has a contour which is adapted to the shape of the strainer cage (2), in that the base strip (11) is in the form of a hollow-cylinder segment, and in that the at least one pressure zone is free of screw threads, and in that the height of the extension (12) of at least one scraper shell (10) decreases in a longitudinal direction, and also in that the extension (12) is of nose-like form, and in that the base strip (11) is curved in a transverse direction such that the outer side of the scraper shell (10) realizes a segment of a cylinder surface or the base strip (11) realizes a hollow-cylinder segment.
  2. Pressing apparatus (1) according to Claim 1, characterized in that, in a pressure zone, at least two scraper shells (10) are arranged in the cage zone/in the cage zones of a respective strainer-cage section (4).
  3. Pressing apparatus (1) according to Claim 2, characterized in that the scraper shells (10) are arranged in a uniformly distributed manner in the respective strainer-cage section (4).
  4. Pressing apparatus (1) according to at least one of the preceding claims, characterized in that the contour of the extension (12) of at least one scraper shell (10) is adapted to the shape of the conveying device in the respective strainer-cage section (4).
  5. Pressing method in which pressing material is transported into the region of a pressure zone with the aid of a first conveying screw (13a) and, in the pressure zone, the pressing material is mixed and/or guided and/or held with the aid of a plurality of scraper shells (10), and in which the pressing material is transported onwards in the conveying direction downstream of the pressure zone with the aid of a second conveying screw (13b), characterized in that use is made of a pressing apparatus (1) according to at least one of Claims 1 to 4.
EP20194239.8A 2019-12-19 2020-09-03 Method and device for pressing Active EP3838577B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019135051.4A DE102019135051A1 (en) 2019-12-19 2019-12-19 Method and device for pressing

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EP3838577A1 EP3838577A1 (en) 2021-06-23
EP3838577C0 EP3838577C0 (en) 2024-05-08
EP3838577B1 true EP3838577B1 (en) 2024-05-08

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ID=72355825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20194239.8A Active EP3838577B1 (en) 2019-12-19 2020-09-03 Method and device for pressing

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US (1) US11820097B2 (en)
EP (1) EP3838577B1 (en)
CN (1) CN113002044A (en)
DE (1) DE102019135051A1 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US829314A (en) * 1903-07-01 1906-08-21 Valerius D Anderson Press.
US2149736A (en) * 1933-10-21 1939-03-07 Stanley Hiller Ltd Apparatus and method for expressing fluid
US2960926A (en) * 1957-10-02 1960-11-22 Mckee Dev Corp Screw press
US3191521A (en) * 1959-08-24 1965-06-29 Coproducts Corp Fluid expressing method
US3092017A (en) * 1960-08-02 1963-06-04 French Oil Mill Machinery Liquid expressing press
US3218964A (en) * 1963-01-24 1965-11-23 Bauer Bros Co Cage bar
DE1502230A1 (en) * 1963-03-29 1969-02-20 Coproducts Corp Press offer structure
US3276354A (en) * 1965-10-08 1966-10-04 French Oil Mill Machinery Apparatus for drying elastomeric materials
US3518936A (en) * 1968-09-09 1970-07-07 French Oil Mill Machinery Mechanical screw press
FR2427194A1 (en) * 1978-05-31 1979-12-28 Pb Gelatines PERFECTED PRESS
DE3026477A1 (en) * 1980-07-12 1982-02-04 Fried. Krupp Gmbh, 4300 Essen SCREW PRESS

Also Published As

Publication number Publication date
EP3838577C0 (en) 2024-05-08
EP3838577A1 (en) 2021-06-23
DE102019135051A1 (en) 2021-06-24
CN113002044A (en) 2021-06-22
US11820097B2 (en) 2023-11-21
US20210187889A1 (en) 2021-06-24

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