EP0263285B1 - Centrifugeuse à sucre travaillant en continu - Google Patents

Centrifugeuse à sucre travaillant en continu Download PDF

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Publication number
EP0263285B1
EP0263285B1 EP87112232A EP87112232A EP0263285B1 EP 0263285 B1 EP0263285 B1 EP 0263285B1 EP 87112232 A EP87112232 A EP 87112232A EP 87112232 A EP87112232 A EP 87112232A EP 0263285 B1 EP0263285 B1 EP 0263285B1
Authority
EP
European Patent Office
Prior art keywords
annulus
sugar
ring
operable
openings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87112232A
Other languages
German (de)
English (en)
Other versions
EP0263285A2 (fr
EP0263285A3 (en
Inventor
Helmut Schaper
Heinrich Kurland
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.)
BMA Braunschweigische Maschinenbauanstalt AG
Original Assignee
BMA Braunschweigische Maschinenbauanstalt AG
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Publication date
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Application filed by BMA Braunschweigische Maschinenbauanstalt AG filed Critical BMA Braunschweigische Maschinenbauanstalt AG
Publication of EP0263285A2 publication Critical patent/EP0263285A2/fr
Publication of EP0263285A3 publication Critical patent/EP0263285A3/de
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Publication of EP0263285B1 publication Critical patent/EP0263285B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor

Definitions

  • the invention relates to a continuously operating sugar centrifuge with a conically enlarged centrifugal drum and a sugar collecting housing, in which a discharge flange arranged at the far end of the centrifugal drum is surrounded by sugar collecting elements, which are designed as flat, thin, resiliently resilient metal sheets and at a variable angle of attack to the direction of flight the crystals are attached to a rotating drivable ring.
  • Sugar centrifuges of the aforementioned type are known (DE-C-31 29 392), in which a gentle braking or change of direction is achieved by the impact of the sugar crystals on the resilient metal sheets in order to avoid crystal breakage or crystal damage or at least to such an extent reduce that the sugar produced meets at least the minimum requirements for quality sugar.
  • the invention has for its object to develop a sugar centrifuge of the aforementioned type so that it can be operated either for the extraction of crystalline sugar or as a mashing centrifuge with gentle treatment of the sugar crystals and intensive mixing of the crystals with the mashing liquid before reaching the sugar collection space.
  • the sugar centrifuge mentioned at the outset is designed as indicated in the respective characterizing part of claim 1, 2 or 3.
  • the aforementioned ring lines are known for mashing centrifuges of another type (DE-A-27 55 130), but in this known embodiment the mashing liquid from the ring line is fed perpendicularly to the plane of the discharge flange of the rotating centrifuge drum.
  • the result is extremely strong atomization and fog. Since the liquid emerging from the ring line onto the ejection flange only reaches a substantially lower peripheral speed than the sugar crystals during the short contact time with the ejection flange, meet the liquid and the sugar crystals at different points on the stationary baffle surrounding the discharge flange, so that neither mixing of the sugar crystals with the supplied liquid nor gentle treatment of the sugar crystals can be achieved.
  • the gentle treatment of the sugar crystals is of particular importance for mashing centrifuges, since experience has shown that it is favorable if there is little crystal splinter in the magma that is formed during mashing and this magma is used as a crystal base or should be processed again in a second spinning process, as is very much the case is often practiced in the sugar industry to achieve uniform sugar crystals.
  • the impact energy of the sugar crystals is reduced by the resilient metal sheets, the gentle braking or deflection of the sugar crystals being achieved by adjusting the speed of the drivable ring with the metal sheets held thereon and by the angle of attack such that damage to the crystals can be achieved can be largely prevented.
  • the mashing liquid By supplying the mashing liquid to the metal sheets or to one held at a distance from the sheets and with this circumferential guide wall there is an additional reduction in the impact energy by the penetration of the crystals into the liquid film located on the metal sheets or the guide wall while the crystals strike the metal sheets or on the guide wall, at the same time an intensive mixing of the crystals with the Liquid takes place, so that very favorable mashing conditions are created.
  • the metal sheets are sprayed directly with the mashing liquid, the amount of the liquid being able to be metered in such a way that a continuous overflow of the metal sheets is ensured.
  • the liquid reaching the conical ring component is directed through the openings in the driven ring onto the individual plates and thus a particularly effective use of the liquid for mashing the sugar crystals is achieved.
  • the supply of the mash liquid to the conical ring components in the formation of the sugar centrifuge according to claims 2 or 3 can be designed particularly favorably in that the openings in the ring line are enclosed by these in cross-section and in the direction of the conical ring component pointing pipe sections. These pipe sections cause the liquid to be brought close to the conical ring components, so that as little of the liquid as possible is sprayed and thus remains ineffective.
  • the drawing shows exemplary embodiments of the invention in a schematic representation.
  • the conically shaped centrifugal drum 1 is surrounded by a liquid collecting space 2, which in turn is enclosed by a sugar collecting housing 3.
  • the centrifugal drum 1 is driven in a manner not shown, about its central longitudinal axis, so that the filler material applied in the area of the cross-sectionally narrow part of the drum is separated from the liquid phase of the process on the sieves of the centrifugal drum 1.
  • the drain enters the liquid collection chamber 2 while the sugar crystals fly over the discharge flange 4 provided at the wide end of the centrifugal drum 1 at a very high speed in the direction tangential to the discharge flange 4 onto the collecting housing 3.
  • a line 5 protrudes into the centrifugal drum 1 through a central opening 1a, which at the same time serves to supply the filling compound in a manner not shown, through which a covering liquid is applied to the filling compound migrating upwards along the centrifugal drum 1.
  • a rotatably drivable ring 7 is provided in the illustrated embodiments of the centrifuge, which extends parallel to the discharge flange 4 and which extends over the circumference uniformly distributed radial arms 8 is connected to a hub 9, which in turn is arranged rotatably with the interposition of bearings 10 on a stationary sleeve part surrounding the central opening 1a.
  • the hub 9 carries at its upper end a V-belt pulley 12 which is connected to it in a rotationally secure manner and on which a V-belt 13 engages, which in turn is placed around the drive pulley 14 of a drive motor 15 whose speed is adjustable.
  • the drive motor 15 is mounted on the stationary centrifuge housing.
  • thin, elastically resilient metal sheets 16 are held as sugar collecting elements, which protrude into the trajectory of the sugar crystals departing from the discharge flange 4.
  • the thin, elastically resilient metal sheets 16 are distributed at a uniform distance over the circumference of the rotatably drivable ring 7 and can be deflected resiliently with their downward-pointing free edges in the direction of the impinging sugar crystals.
  • the deflected lower free longitudinal edges of the metal sheets 16 are shown in dashed lines in FIG. 2 at 16a.
  • the thin, resilient metal sheets 16 are arranged so that they form an approximately right angle with the trajectory of the sugar crystals.
  • the thin, elastically resilient metal sheets can also be arranged such that their angular position with respect to the trajectory of the sugar crystals can be changed.
  • the rotatably drivable ring 7 with the thin, elastic rings held thereon can resilient metal sheets 16 are set in rotational motion at such a speed that the sugar crystals are gently braked and deflected without the risk of crystal destruction, with a resilient damping upon impact of the sugar crystals onto the metal sheets before the sugar crystals move at a significantly reduced speed in the direction of that Sugar trap housing 3 surrounding sugar trap room 3a.
  • a ring line 17 is provided below the thin, elastically resilient metal sheets 16, which has nozzle openings directed upwards, i.e. onto the thin, resilient metal sheets 16, from which one of the ring lines 17 is shown in a manner not shown Mash liquid supplied in this way is sprayed onto the metal sheets 16.
  • the spraying is carried out with only slight excess pressure, so that a liquid film forms on the resilient metal sheets 16, on which the sugar crystals flying over the ejection flange 4 strike and are additionally damped in their movement. In this way, the sugar crystals are simultaneously mashed in with the mashing liquid. This prevents the sugar crystals from adhering to the thin, elastically resilient metal sheets 16.
  • the liquid and the crystals slide off the sheets upon further mixing and are transferred into the sugar collecting chamber 3a with a substantially lower peripheral speed when leaving the discharge flange 4 of the drum 1 compared to the speed of the sugar crystals .
  • the ring line 17 is above the driven one Ring 7 arranged.
  • the ring line 17 is surrounded by an upwardly conically tapering ring component 18, which is held on the driven ring 7 in a liquid-tight and non-rotatable manner.
  • 16 through openings 19 are provided in the driven ring 7 in the region of each thin, elastically resilient sheet.
  • the ring line 17 is in turn arranged above the ring 7 which can be driven in rotation.
  • the ring line 17 and the rotatably drivable ring 7 with the thin, elastically resilient sheets 16 held thereon are enclosed by a ring component 20 which widens conically towards the drum base.
  • the ring member 20 is fixedly connected to the rotating ring 7 so that it rotates with the ring.
  • the thin, elastically resilient sheets 16 held on the rotatingly drivable ring are arranged in this embodiment in such a way that they deflect the striking sugar crystals in the direction of the conical ring component while braking. In some cases, the deflection also takes place by pivoting out the lower free edge of the metal sheets 16.
  • the outlet openings provided on the ring line 17 are directed onto the ring component 20, so that a liquid film forms thereon, on which the sugar crystals strike and additionally are dampened in their movement and in the manner already described in connection with FIGS. 1 to 3 mashed and are thrown out of its lower edge at a relatively low peripheral speed due to the rotational movement of the conical ring member 20.
  • a liquid film forms thereon, on which the sugar crystals strike and additionally are dampened in their movement and in the manner already described in connection with FIGS. 1 to 3 mashed and are thrown out of its lower edge at a relatively low peripheral speed due to the rotational movement of the conical ring member 20.
  • the ring lines 17 are equipped with small thin pipe sections 21, each pointing towards the ring components 18 and 20, which surround the respective outlet openings in the ring line 17 and the mash liquid in the direction lead to the ring components 18 and 20 mentioned.
  • the liquid emerges from the ring line only at a very low pressure.
  • the pipe sections 21 avoid atomization of the liquid, but ensure a uniform distribution on the surfaces to be wetted.

Landscapes

  • Centrifugal Separators (AREA)

Claims (4)

  1. Centrifugeuse à sucre fonctionnant en continu, comportant un panier centrifuge (1) élargi coniquement et un carter collecteur de sucre (3), dans laquelle un rebord de déversement (4) placé à l'extrémité large du panier centrifuge (4) est entouré par des éléments collecteurs de sucre qui se présentent sous la forme de tôles métalliques planes minces faisant un amortissement élastique (16) et son fixées à un anneau (7) pouvant être entraîné en rotation à un angle d'inclinaison éventuellement variable par rapport à la direction de la trajectoire des cristaux, caractérisée en ce qu'il est prévu à distance axiale de l'anneau (7) pouvant être entraîné et parallèlement à celui-ci, au-dessous des tôles métalliques (16), une conduite annulaire (17) fixe comportant des ouvertures de sortie réparties uniformément à la périphérie pour un liquide de malaxage, et en ce que les ouvertures de sortie des conduites annulaires (17) se présentent sous la forme d'ouvertures d'éjection dirigées vers les tôles métalliques (16).
  2. Centrifugeuse à sucre fonctionnant en continu, comportant un panier centrifuge (1) élargi coniquement et un carter collecteur de sucre (3), dans laquelle un rebord de déversement (4) placé à l'extrémité large du panier centrifuge (4) est entouré par des éléments collecteurs de sucre qui se présentent sous la forme de tôles métalliques planes minces faisant un amortissement élastique (16) et sont fixés à un anneau (7) pouvant être entraîné en rotation à un angle d'inclinaison éventuellement variable par rapport à la direction de la trajectoire des cristaux, caractérisée en ce qu'il est prévu à distance axiale de l'anneau (7) pouvant être entraîné en rotation et parallèlement à celui-ci, au-dessus de lui, une conduite annulaire (17) fixe comportant des ouvertures de sortie réparties uniformément à la périphérie pour un liquide de malaxage, en ce qu'il est prévu dans l'anneau (7) pouvant être entraîné au voisinage de chaque tôle (16) une ouverture de passage (19) et un composant annulaire conique (18) s'amincissant coniquement vers le haut, embrassant ces ouvertures de passage, dépassant en hauteur de l'anneau (7) pouvant être entraîné, et en ce que les ouvertures de sortie de la conduite annulaire (17) sont dirigées en direction du composant conique (18).
  3. Centrifugeuse à sucre fonctionnant en continu, comportant un panier centrifuge (1) élargi coniquement et un carter collecteur de sucre (3), dans laquelle un rebord de déversement (4) placé à l'extrémité large du panier centrifuge (4) est entouré par des éléments collecteurs de sucre qui se présentent sous la forme de tôles métalliques planes minces faisant un amortissement élastique (16) et sont fixés à un anneau (7) pouvant être entraîné en rotation à un angle d'inclinaison éventuellement variable par rapport à la direction de la trajectoire des cristaux, caractérisée en ce qu'il est prévu à distance axiale de l'anneau (7) pouvant être entraîné, parallèlement à celui-ci et au-dessus de lui, une conduite annulaire (17) comportant des ouvertures de sortie réparties uniformément à la périphérie pour un liquide de malaxage, et en ce qu'un composant conique annulaire (20) constituant une paroi de guidage, embrassant avec jeu l'anneau (7) et les tôles métalliques (16) qui y sont fixées, dont la section droite la plus grande est dirigée vers le fond du panier, est relié à l'anneau (7), et en ce que les ouvertures de la conduite annulaire (17) sont dirigées vers le composant annulaire conique (20).
  4. Centrifugeuse à sucre, selon l'un des revendications 2 ou 3, caractérisée en ce que les ouvertures de la conduite annulaire (17) sont entourées par des sections tubulaires (21) de section droite adaptée à celles-ci et dirigées vers le composant annulaire conique (18 ou 20).
EP87112232A 1986-10-04 1987-08-24 Centrifugeuse à sucre travaillant en continu Expired - Lifetime EP0263285B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3633890 1986-10-04
DE19863633890 DE3633890A1 (de) 1986-10-04 1986-10-04 Kontinuierlich arbeitende zuckerzentrifuge

Publications (3)

Publication Number Publication Date
EP0263285A2 EP0263285A2 (fr) 1988-04-13
EP0263285A3 EP0263285A3 (en) 1989-07-26
EP0263285B1 true EP0263285B1 (fr) 1992-06-03

Family

ID=6311086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112232A Expired - Lifetime EP0263285B1 (fr) 1986-10-04 1987-08-24 Centrifugeuse à sucre travaillant en continu

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US (1) US4804419A (fr)
EP (1) EP0263285B1 (fr)
DE (2) DE3633890A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4976853A (en) * 1989-02-02 1990-12-11 Lee Chung Y Control valve means for use in a filtration apparatus for treating waste product
DE3929597A1 (de) * 1989-09-06 1991-03-07 Krupp Buckau Maschinenbau Gmbh Austragvorrichtung fuer kontinuierlich arbeitende siebzentrifugen
AU667793B3 (en) * 1995-03-07 1996-04-04 Stg Holdings Pty Ltd Centrifugal separations apparatus and blending apparatus therefor
US6267899B1 (en) 1997-04-22 2001-07-31 Stg-Fcb Holdings Pty Ltd. Centrifugal separation apparatus and method of using the same

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238063A (en) * 1962-08-03 1966-03-01 American Factors Ass Ltd Continuous centrifugal apparatus and method of continuously separating granular crystals therewith
FR1379054A (fr) * 1963-10-10 1964-11-20 Fives Lille Cail Perfectionnements aux essoreuses continues à panier conique pour l'obtention d'un mélange riche en cristaux
DE2025828C3 (de) * 1970-05-27 1980-07-10 Maschinenfabrik Buckau R. Wolf Ag, 4048 Grevenbroich Kontinuierlich arbeitende Zentrifuge, insbes. Zuckerzentrifuge
FR2245415B1 (fr) * 1973-10-02 1978-09-29 Fives Cail Babcock
DE2755130A1 (de) * 1977-12-10 1979-06-13 Selwig & Lange Maschf Verfahren und vorrichtung zum einmaischen von zuckerkristallen
DE2803160C3 (de) * 1978-01-25 1982-12-09 Braunschweigische Maschinenbauanstalt, 3300 Braunschweig Kontinuierlich arbeitende Zentrifuge
DE3129392C1 (de) * 1981-07-25 1983-03-31 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Zuckerzentrifuge mit federnden Zuckerauffangblechen

Also Published As

Publication number Publication date
DE3779544D1 (de) 1992-07-09
EP0263285A2 (fr) 1988-04-13
DE3633890A1 (de) 1988-04-07
US4804419A (en) 1989-02-14
EP0263285A3 (en) 1989-07-26

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