WO2022263183A1 - Tambour centrifuge d'un séparateur à buses et séparateur à buses - Google Patents

Tambour centrifuge d'un séparateur à buses et séparateur à buses Download PDF

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Publication number
WO2022263183A1
WO2022263183A1 PCT/EP2022/064966 EP2022064966W WO2022263183A1 WO 2022263183 A1 WO2022263183 A1 WO 2022263183A1 EP 2022064966 W EP2022064966 W EP 2022064966W WO 2022263183 A1 WO2022263183 A1 WO 2022263183A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
centrifuge drum
sides
longitudinal axis
pocket
Prior art date
Application number
PCT/EP2022/064966
Other languages
German (de)
English (en)
Inventor
Thomas Kleimann
Kathrin Quiter
Original Assignee
Gea Westfalia Separator Group Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gea Westfalia Separator Group Gmbh filed Critical Gea Westfalia Separator Group Gmbh
Publication of WO2022263183A1 publication Critical patent/WO2022263183A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B04B1/12—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with continuous discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls

Definitions

  • the invention relates to a centrifuge bowl of a nozzle separator and a nozzle separator.
  • DE 671 350 C discloses a milk separator with a centrifuge drum with wedge-shaped nozzle pockets at the tips of which a discharge opening is located, in each of which a nozzle is inserted.
  • nozzle and “discharge nozzle” are used synonymously in the context of this present invention.
  • Fig. 5a-5c of this invention show nozzle pockets of a centrifuge drum GE according to the prior art in a pyramidal configuration.
  • the shape of the nozzle pockets corresponds to a known shape, which was shown, inter alia, in Figure 2b of EP 2091 657 B1 or Figure 2 of EP 2962763 A1 and has long been part of the prior art in the field of separators.
  • the shape of the nozzle pockets determines the sliding behavior of the discharged solids.
  • the invention solves these problems by providing a centrifuge drum with the features of claim 1 and by a nozzle separator with the features of claim 14.
  • a centrifuge drum according to the invention of a nozzle separator has an axis of rotation. Furthermore, the centrifuge drum has a plurality of nozzle pockets, which are distributed along a cross section of the centrifuge drum. This cross section is arranged perpendicular to the axis of rotation of the centrifuge drum. The contour (both vertically and horizontally) of a respective nozzle pocket decreases in its radial course from an inner circumference of the centrifuge drum to a discharge opening at the end of the nozzle pocket.
  • a nozzle is permanently arranged in the discharge opening. It can be a separate part related to the centrifuge bowl. The nozzle can usually be replaced, for example by screwing or plugging it into the centrifuge drum.
  • the centrifuge drum including the nozzle pockets can be made in one piece, but the nozzle pockets can also be formed by fittings that can be replaced in the drum.
  • centrifuge bowl or the entire centrifuge bowl can be made of metal, such as stainless steel, and/or plastic.
  • the design as a plastic centrifuge drum is particularly preferred for single-use applications, e.g. for pharmaceutical and/or medical applications and/or when treating products under aseptic conditions.
  • the nozzle pocket has a longitudinal axis.
  • at least one side surface defines an angle of repose, this angle of repose not being linear and in particular being designed to increase or decrease towards the longitudinal axis.
  • the angle of repose is to be understood as the angle between a side face and the longitudinal axis of the nozzle pocket.
  • several side surfaces of the nozzle pocket can be designed as curved triangular surfaces or as triangular surfaces bent along one edge.
  • the triangular surfaces and all other surfaces described below as curved or kinked therefore do not have to be continuously two-dimensional or have straight side surfaces, but can preferably have a non-Euclidean geometry.
  • the non-Euclidean geometries are specializations of absolute geometry. They differ from Euclidean geometry, which can also be formulated as a specialization of absolute geometry, in that the parallel axion does not apply to them and they can therefore be curved.
  • the recess formed by the nozzle pocket along an inner circumference of the drum wall of the centrifuge drum can have an opening in the form of a square base, in particular a square base with curved sides.
  • This base is rectangular in shape with two parallel first sides and two parallel second sides that are curved in the circumferential direction of the centrifugal drum, it being possible for the first sides and the second sides to be of different lengths. In contrast, in the case of a pyramidal arrangement, the sides of the base are essentially of equal length.
  • the four-sided delimiting side surfaces of the nozzle pockets are not of essentially the same design, but have different dimensions and/or angles of repose.
  • different angles of repose of the surfaces involved can be provided by the different side surfaces, so that the sliding behavior of the solids to be discharged is varied by means of differently designed side surfaces. In this way, the discharge behavior of solids can be influenced.
  • the base of the recess defined by the nozzle pocket can in particular be a base with sides bent towards the middle.
  • the nozzle pocket can have a mechanical interface in the discharge opening, preferably a manually detachable interface, in particular a screw or plug connection, to the nozzle, so that the nozzle is arranged on the centrifuge drum in an exchangeable manner.
  • the aforementioned quadrangular base with the curved sides can advantageously have a rotational symmetry about its longitudinal axis of more than 90°, in particular 180°.
  • the nozzle pocket can advantageously have a plurality of side surfaces, with at least one of the side surfaces being curved with a bend or kinked at a kink, preferably perpendicular to the longitudinal axis.
  • Two side surfaces are particularly preferably provided with the bend or kink and can be brought into congruence with one another by rotating them through 180° about the axis of symmetry.
  • All side surfaces of the nozzle pocket can advantageously be designed as arched or kinked triangular surfaces.
  • the surfaces can be bent toward the longitudinal axis, resulting in a convex contour for the affected surface of the nozzle pocket. In other words, the angle of repose increases gradually or abruptly as it progresses towards the tip of the nozzle pocket. Likewise, the surfaces can be bent away from the longitudinal axis, resulting in a concave contour for the affected surface of the nozzle pocket.
  • the interface to the nozzle can advantageously form a corner of the respective triangular surface.
  • a corner does not have to be tapered. You can also be constantly rounded end or end in a threaded surface.
  • the angle of repose of two opposite surfaces of the nozzle pocket increases abruptly when approaching the longitudinal axis. This increase may be due to the aforementioned kink.
  • the side surface can also approach the longitudinal axis with a gradually increasing angle of repose.
  • the base surface can have two first sides running parallel to the axis of rotation and two second sides running parallel and curved in the circumferential direction of the centrifugal drum, the first and second sides being of the same length or the first sides being longer or shorter than the two th pages.
  • a corresponding side surface in particular in the form of an aforementioned triangle surface, can be designed as an ellipsoid or paraboloid, concave or convex.
  • the side surface can also be designed as part of a polygonal half-shell, for example comprising one or more of the aforementioned triangular surfaces.
  • the nozzle pocket particularly preferably consists exclusively of curved or kinked triangular surfaces.
  • a nozzle separator according to the invention comprises a centrifugal drum according to the invention.
  • FIG. 1a-1d an annular arrangement of a first embodiment variant of nozzle pockets according to the invention
  • 2a-2d show an annular arrangement of a second embodiment variant of nozzle pockets according to the invention
  • 3a-3d an annular arrangement of a third embodiment variant of nozzle pockets according to the invention
  • 4a-4d show an annular arrangement of a fourth embodiment variant of nozzle pockets according to the invention
  • 5a-5c show an annular arrangement of a fifth embodiment variant of nozzle pockets according to the invention
  • FIG. 6 shows a schematic representation of a centrifuge drum in which the arrangement of the nozzle pockets can be realized according to the invention.
  • FIG. 6 shows a double-conical centrifuge drum of a nozzle separator designed as a centrifuge drum 100, with a drum wall 110 which is preferably designed for continuous operation, i.e. the continuous and not batch processing of a product.
  • the centrifuge drum 100 has a vertical axis of rotation D.
  • a separating plate stack 300 of conical separating plates 400 is arranged in the drum interior - also called centrifugal space 200 - a separating plate stack 300 of conical separating plates 400 is arranged.
  • the separating discs 400 are arranged on a distribution shaft 600 .
  • a feed pipe 500 is used to feed a product to be processed into distribution channels 700 and from these into the centrifugal chamber 200.
  • the product is clarified to remove solids and optionally separated into two or more liquid phases of different densities.
  • One or more outlets 900 for liquid phases which can be provided with paring disks, for example, are used to drain off the at least one liquid phase.
  • the solids are ejected outwards from the centrifuge drum 100 through circumferentially distributed, radially extending openings 800, preferably in the region of the largest radius/circumference of the centrifuge drum.
  • a discharge nozzle 1 can be inserted into the openings 800 of the drum wall 110, which can be screwed in, for example.
  • the openings 800 are in the drum wall 110 essentially radially—relative to the axis of rotation—aligned, but they can also have a tangential directional component.
  • the centerline of the bore in the nozzles may have a tangential directional component with respect to the axis of rotation of the drum.
  • Figures 1 to 5 show the outlet opening 800 with the discharge nozzle 1 at the end of a nozzle pocket 2.
  • This nozzle pocket delimits a recess 3 in the interior of the drum, with a square base area 4 with a longitudinal axis L running perpendicular thereto.
  • quadrilateral is also extended to quadrilateral forms of non-Euclidean geometry with two or four opposite convex curved sides 6-9.
  • 2-4 sides running parallel to one another can also form the square, as is shown in some embodiment variants.
  • Fig. 1 a-d shows a first arrangement of nozzle pockets 2 arranged side by side in a ring plane.
  • the nozzle pockets 2 have, starting from the respective base area 4 - limited by the sides 6-9 - a total of four triangular areas 10-13, of which, however only two triangular surfaces 10 and 12, and 11 and 13 can be brought into congruence with each other.
  • the triangular surfaces 10, 12 have a constant angle of repose a.
  • the triangular surfaces 11, 13 do not have a two-dimensional course, but rather a less steep course in the course of the triangular surfaces to the longitudinal axis L, i.e. a concave curved shape with an angle of repose ß that decreases towards the tip .
  • triangular area within the meaning of the present invention also includes a corner point which is formed by a mechanical interface 14 towards a discharge opening 16 .
  • This corner point can also be rounded. It it is not necessary within the scope of the present invention that two sides of the triangle meet at the vertex. Rather, a small spacing between the sides of the triangle at this corner point, in particular a spacing of less than 15 mm, is possible, with the spacing particularly preferably being largely bridged by the interface 14 .
  • the cross section of a respective nozzle pocket 2 decreases in its radial course from an inner circumference I of the centrifuge drum to a discharge opening 16hin.
  • the common sides 6 and 8 of the base 4 and the triangular surfaces 10 and 12 running parallel to the axis of rotation D of the centrifuge drum have a rectilinear shape running parallel to one another, while the common sides 7 and 9 of the base 4 and of the triangular surfaces 11 and 13 are curved, in particular convex, toward the center of the base 4 .
  • the triangular surfaces 10 and 12 themselves run linearly while the Dreiecksflä surfaces 11 and 13 increasingly asymptotically approach the longitudinal axis L of the nozzle pocket 2 as they progress from the base surface 4 to the discharge opening 16
  • FIG. 2a-d shows a second arrangement of nozzle pockets 2' arranged next to one another in a ring plane.
  • the nozzle pockets 2' analogous to Fig. 1a-1c, starting from the respective base area 4', have a total of four triangular areas 10'-13', of which, however, only two triangular areas 10' and 12', such as 11' and 13' in coverage can be brought to each other.
  • the sides 6' and 8' have a curved geometry, in particular directed convexly towards the center of the base area 4, while the sides 7' and 9' of the base area are essentially parallel to a discharge opening 16 'Run formed ring plane.
  • FIG. 2a-d shows a second arrangement of nozzle pockets 2' arranged next to one another in a ring plane.
  • 1a-1c starting from the respective base area 4', the nozzle pockets 2' have a total of four triangular areas 10'-13', of which, however, only two triangular areas 10' and 12' and 11' and 13' are congruent can be brought together.
  • the sides 6' and 8' running parallel to the axis of rotation of the centrifuge drum have a geometry that is asymptotic to the longitudinal axis, in particular a convex geometry, while the sides 7' and 9' of the base area are essentially parallel to an annular plane formed by the discharge opening 16'.
  • the triangular surfaces 11' and 13' themselves run linearly while the triangular surfaces 10' and 12' increasingly asymptotically approach the longitudinal axis L of the nozzle pocket 2' as they progress from the base surface 4' to the discharge opening 16'.
  • FIG. 3a-d shows a third arrangement of nozzle pockets 2′′ arranged next to one another in a ring plane.
  • the nozzle pockets 2" also have a base area of 4" and a total of four triangular areas 10"-13". Two of the triangular surfaces 10" and 12" as well as 11" and 13" can each be brought into congruence with each other.
  • the triangular surfaces 10", 12" have a kink 15", which is preferably formed parallel to the axis of rotation D. Correspondingly, this is also a kinked form of a triangular surface 10', 12'.
  • the kink 15" is particularly preferably at a height of between 35-65% of the longitudinal extent of the respective triangular area 10", 12".
  • the base area 4′′ of the nozzle pockets 2′′ or the recess delimited by them can preferably be rectangular in shape in FIGS. 3a-3c.
  • at least two triangular surfaces of the nozzle pockets have a Euclidean design.
  • the opposing triangular surfaces 10"-12" have two partial areas which are separated from one another by the kink 15" and which run linearly, but are arranged at a different angle to the longitudinal axis L.
  • the triangular areas 11" and 13 are monotonously linear.
  • the 10" and 12" triangular surfaces can be interchanged with the 11" and 13" triangular surfaces.
  • a further variant for influencing the slipping behavior of solids consists in changing the base area of the recess formed by the nozzle pocket.
  • 1a-3d each show variants with non-linearly designed, in particular non-linearly increasing, angles of repose.
  • the angles of repose of the surfaces delimiting the nozzle pockets of the present invention unlike in the case of a pyramid, do not have constant angles of repose ⁇ and/or ⁇ .
  • the friction of the solids on the boundary surfaces of the nozzle pockets depends on the inclination of these surfaces to the longitudinal axis, the surface roughness and the force with which they are pressed onto this surface.
  • the combination of acceleration angle and slope angle can be optimized by the non-linear increase in such a way that the slip behavior of the solid in the nozzle pocket is improved and ideally over the entire The course of the nozzle pocket remains the same.
  • this base area 4' has a rectangular base area, with two opposite sides 6"" and 8"" running parallel to the axis of rotation D of the centrifuge drum being at least 10% longer than the other two slightly in Circumferentially curved sides 7"" and 9"".
  • the rectangular base also allows the variation of a further degree of freedom in the structural design of a centrifuge drum. This allows the number of nozzles to be adjusted, as well as a variance in the ratio of drum diameter, drum height, and number of nozzles or angle of repose.

Landscapes

  • Centrifugal Separators (AREA)

Abstract

L'invention concerne un tambour centrifuge (100) d'un séparateur à buses, comprenant un axe de rotation (D) et une pluralité de poches de buse (2, 2', 2'', 2''') réparties de manière périphérique le long d'une section transversale perpendiculaire à l'axe de rotation (D), la section transversale de chaque poche de buse (2, 2', 2'', 2''') diminuant sur l'extension radiale de la poche de buse depuis une périphérie intérieure (I) du tambour centrifuge (100) vers une ouverture d'évacuation (16') d'une buse (1, 1'), ladite buse étant située à une extrémité de la poche de buse (2, 2', 2'', 2'''), la poche de buse (2, 2', 2'', 2''') définissant un évidement (3) ; la poche de buse (2, 2', 2''') possédant un axe de symétrie (L), et au moins une des surfaces latérales (10, 10', 10'', 11, 11', 11'', 12, 12', 12'', 13, 13', 13'') définissant un angle d'inclinaison, l'angle d'inclinaison n'étant pas linéaire, et en particulier s'élevant vers l'axe de symétrie (L) ; ou l'évidement (3) possédant, le long d'une périphérie intérieure (I) du tambour centrifuge (100), une ouverture se présentant sous la forme d'une surface de base carrée (4'''), en particulier une surface de base carrée non euclidienne, ladite surface de base (4''') étant rectangulaire avec deux premiers côtés parallèles (6''',8''') et deux deuxièmes côtés parallèles (7''', 9'''), les deux côtés étant incurvés dans la direction périphérique du tambour centrifuge, et les premiers côtés (6'',8''') étant plus longs que les deuxièmes côtés (7''',9'').
PCT/EP2022/064966 2021-06-17 2022-06-01 Tambour centrifuge d'un séparateur à buses et séparateur à buses WO2022263183A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021115753.6A DE102021115753A1 (de) 2021-06-17 2021-06-17 Zentrifugentrommel eines Düsenseparators und Düsenseparator
DE102021115753.6 2021-06-17

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WO2022263183A1 true WO2022263183A1 (fr) 2022-12-22

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WO (1) WO2022263183A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB365450A (en) * 1930-05-14 1932-01-21 Separator Ab Improvements in centrifugal bowls
DE572765C (de) * 1929-01-04 1933-03-22 James Walter Adams Trennschleuder mit Einsatztellern
DE671350C (de) 1935-05-23 1939-02-06 Harold William Fawcett Milchschleudermaschine mit Einsatztellern
EP0486260A2 (fr) * 1990-11-13 1992-05-20 Dorr-Oliver Incorporated Centrifugeuse à haut rendement de lavage
WO2002085525A1 (fr) * 2001-04-25 2002-10-31 Phase Inc. Centrifugeuse
EP2091657B1 (fr) 2006-11-14 2010-09-01 GEA Westfalia Separator GmbH Centrifugeuse, en particulier séparateur, dotée de tuyères de sortie de solide
EP2962763A1 (fr) 2014-07-04 2016-01-06 Andritz Frautech S.r.l. Tambour de séparateur de buse

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE572765C (de) * 1929-01-04 1933-03-22 James Walter Adams Trennschleuder mit Einsatztellern
GB365450A (en) * 1930-05-14 1932-01-21 Separator Ab Improvements in centrifugal bowls
DE671350C (de) 1935-05-23 1939-02-06 Harold William Fawcett Milchschleudermaschine mit Einsatztellern
EP0486260A2 (fr) * 1990-11-13 1992-05-20 Dorr-Oliver Incorporated Centrifugeuse à haut rendement de lavage
WO2002085525A1 (fr) * 2001-04-25 2002-10-31 Phase Inc. Centrifugeuse
EP2091657B1 (fr) 2006-11-14 2010-09-01 GEA Westfalia Separator GmbH Centrifugeuse, en particulier séparateur, dotée de tuyères de sortie de solide
EP2962763A1 (fr) 2014-07-04 2016-01-06 Andritz Frautech S.r.l. Tambour de séparateur de buse

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Publication number Publication date
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