EP0156935B1 - Tambour centrifuge pour centrifugeuse travaillant en continu - Google Patents

Tambour centrifuge pour centrifugeuse travaillant en continu Download PDF

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Publication number
EP0156935B1
EP0156935B1 EP19840103644 EP84103644A EP0156935B1 EP 0156935 B1 EP0156935 B1 EP 0156935B1 EP 19840103644 EP19840103644 EP 19840103644 EP 84103644 A EP84103644 A EP 84103644A EP 0156935 B1 EP0156935 B1 EP 0156935B1
Authority
EP
European Patent Office
Prior art keywords
drum
drain
centrifugal
casing
centrifuge
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
Application number
EP19840103644
Other languages
German (de)
English (en)
Other versions
EP0156935A1 (fr
Inventor
Volkmar Dipl. Ing. Hentschel
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
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 BMA Braunschweigische Maschinenbauanstalt AG filed Critical BMA Braunschweigische Maschinenbauanstalt AG
Priority to DE8484103644T priority Critical patent/DE3473416D1/de
Priority to EP19840103644 priority patent/EP0156935B1/fr
Publication of EP0156935A1 publication Critical patent/EP0156935A1/fr
Application granted granted Critical
Publication of EP0156935B1 publication Critical patent/EP0156935B1/fr
Expired legal-status Critical Current

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Classifications

    • 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 centrifugal drum for continuously operating sugar centrifuges, which has a truncated cone-shaped drum shell made from chipless sheet metal, which is separated to form drain slots for the liquid phase of the centrifugal material in at least two shell parts which are successively spaced in the drum axis direction and are separated by the outside of the shell arranged, welded to the jacket parts connecting elements are connected.
  • the drum jackets were perforated in continuously operating sugar centrifuges, so that at least the so-called green drain, i.e. H. the liquid phase contained in the filling compound, which forms a portion of about 50%, should pass out of the centrifugal drum as quickly as possible after passing through the separating sieve supported on the inside of the centrifugal drum on a coarse backing fabric.
  • the holes also followed one another axially in circumferential rows for reasons of strength, and were arranged from row to row on gaps, it was not possible to cover the holes, not least because of the drum diameter, which was increasing in the direction of the drum axis. Rather, the mutual hole spacing increased from row to row in the axial direction.
  • the drain found sufficiently wide flow paths on the inside of the drum jacket to move upwards past the holes.
  • An increase in the hole diameter would have been questionable in terms of strength, particularly in the case of drum sleeves formed without cutting from sheet metal. It is also questionable whether it would have been possible to safely discharge the process.
  • the sugar in the continuously operating centrifuges is covered by spraying on steam and / or water as soon as the green drain is separated.
  • the cover water that is thrown off during the ceiling, the white drain has a considerably higher purity than the green drain.
  • high-flow green waste gets into the white drain, its purity is significantly impaired.
  • the reuse of the white process within the respective cooking processes is then only possible within cooking stages of lower purity or after cleaning stages.
  • drums which are formed from metal sheet without cutting grooves of such a depth and width, which would ensure that the drain does not move upward, cannot be incorporated simply because of the small wall thickness.
  • the non-cutting drums are also not so precisely round that lathes would be able to work in evenly deep and wide grooves.
  • drain rings are far more than ten times as thick or wide as the drum casing, drilling the drain holes is tedious and very time-consuming.
  • DE-A-26 14 922 teaches to assemble a conical centrifugal drum for continuously operating centrifuges from a series of rings that are getting larger and larger in diameter from ring to ring, by connecting round rods between a bottom ring and a large upper ring, which are directed towards the cone-producing Cone run to be welded.
  • the rings are placed on the inside and are to be attached with the round rods. Even if the stitching is done by welding, a stable centrifugal drum cannot be created in this way.
  • centrifuges for example for dewatering plastic granules, with a centrifugal drum extended to the discharge end, the jacket of which is formed by a plurality of rings (baffle rings) arranged at a distance from one another.
  • Such centrifuges consist of several, possibly one cut out conical sheet, baffle rings, between which drain slots are left in the axial direction, but there is a step-like diameter widening between two baffle rings, which is necessary to achieve the baffle effect, so the centrifugal drum is not frustoconical.
  • a separating sieve which is essential for the processing of sugar filling masses, cannot be placed in such a graduated centrifuge; it would break despite the step compensation by underlay fabric due to the enormous centrifugal force on the steps.
  • the invention has for its object to provide a centrifugal drum for continuously operating sugar centrifuges for the formation of drain slots from at least two jacket parts so that the advantages of the non-cutting shaping of sheet metal are retained.
  • the centrifugal drum of the type mentioned is characterized according to the invention in that the connecting elements are formed as tabs deformed in accordance with the curvature of the drum shell and extending in the direction of the cone-producing ends of the drum shell, distributed at equal mutual distances over the drum circumference and with the end edges of the shell parts are additionally welded on the inside.
  • the production of the Schieuder drum designed according to the invention is simple.
  • the drum jacket is joined or welded to the drum base and an upper ring on a welding device.
  • a circumferential strip of the jacket, which corresponds to the drainage slot, is then punched out on the welding device.
  • the tabs are immediately welded on from the outside; after removal from the welding device, the tabs are also welded on the inside to the edges of the jacket parts, which are caused by the piercing.
  • the tabs only need to be cut from sheet metal and slightly deformed according to the curvature of the drum shell before they are welded on. No post-processing is required.
  • the centrifugal drum designed according to the invention is surprisingly advantageous, in particular compared to the version according to DE-A-2749285.
  • the drain groove can be of any width to ensure safe drainage of the drain. In the area of the tabs, the drain groove still has at least the depth that corresponds to the thickness of the drum casing. In addition, there are large free spaces that guarantee a generous, reliable drainage of the process.
  • centrifugal drum designed according to the invention is characterized in that the tabs have a drain hole on their center.
  • the additional drain hole in the lugs represents an additional backup of this function even in extreme operating situations; For example, if the liquid content of a filling compound is large and therefore large discharge quantities have to flow out gushing in a certain zone of the centrifugal drum.
  • the figure shows a half of a centrifugal drum designed according to the invention in a sectional view, with the cutting plane running in the axial plane.
  • the figure shows a centrifugal drum 1 which is intended for continuously operating sugar centrifuges.
  • the centrifugal drum 1 has a drum jacket 2 formed from metal sheet without cutting, which is welded together in a conventional and therefore not shown manner.
  • a drum base 3 is also welded to the lower end and a discharge flange 4 to the upper edge, and the welded connections are not shown in the figure.
  • a dashed line symbolizes the screen covering 5 which is customary on the inside of the conical centrifugal drum 1 and which is composed of a coarse-meshed backing fabric and a separating screen lying thereon.
  • two wide drain slots 6 a strip corresponding to the width of the respective drain slot 6 is cut out of the jacket 2 of the centrifugal drum 1 after welding on the welding device.
  • the tabs are distributed at regular intervals over the respective circumference and run along the cone generatrix of the drum shell 2. As soon as the centrifugal drum 1 forms a unitary whole again by welding the tabs 10, it is removed from the welding device. Now the inner sides of the tabs 10 are accessible and can be welded internally to the edges of the jacket parts 7, 8, 9, which each delimit a drain slot 6.
  • Tabs 10 are provided with an additional drain hole 11 on its center for the safe discharge of extremely large drain quantities.
  • Tabs 10 and jacket 2 consist of corrosion-resistant and tough, alloyed steels of suitable strength.

Landscapes

  • Centrifugal Separators (AREA)

Claims (2)

1. Bol centrifuge pour centrifugeuses fonctionnant en continu, en particulier pour centrifugeuses sucrières, comportant une enveloppe en panier tronconique réalisée à partir de tôle métallique par formage sans enlèvement de copeaux, laquelle, pour des rainures d'écoulement pour la phase liquide du résidu sec obtenu, est divisée en au moins deux parties d'enveloppe se succédant à un certain intervalle dans la direction de l'axe du tambour, qui sont reliées ensemble par des éléments de liaison placés extérieurement sur l'enveloppe, soudés aux parties de l'enveloppe, caractérisé en ce que les éléments de liaison sont réalisés sous la forme d'entretoises ou de plaques plates (10), dirigées dans la direction de la génératrice du cône de l'enveloppe du bol (2), sont répartis à des intervalles mutuels égaux sur la périphérie du bol et sont soudés en plus intérieurement aux arêtes d'extrémité des parties (7, 8, 9) de l'enveloppe.
2. Bol centrifugé selon la revendication 1, caractérisé en ce que les entretoises (10) comportent un trou d'écoulement (11) en leur milieu.
EP19840103644 1984-04-03 1984-04-03 Tambour centrifuge pour centrifugeuse travaillant en continu Expired EP0156935B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8484103644T DE3473416D1 (en) 1984-04-03 1984-04-03 A centrifuge drum for a continuously operating centrifuge
EP19840103644 EP0156935B1 (fr) 1984-04-03 1984-04-03 Tambour centrifuge pour centrifugeuse travaillant en continu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19840103644 EP0156935B1 (fr) 1984-04-03 1984-04-03 Tambour centrifuge pour centrifugeuse travaillant en continu

Publications (2)

Publication Number Publication Date
EP0156935A1 EP0156935A1 (fr) 1985-10-09
EP0156935B1 true EP0156935B1 (fr) 1988-08-17

Family

ID=8191859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840103644 Expired EP0156935B1 (fr) 1984-04-03 1984-04-03 Tambour centrifuge pour centrifugeuse travaillant en continu

Country Status (2)

Country Link
EP (1) EP0156935B1 (fr)
DE (1) DE3473416D1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1158906B (de) * 1962-07-25 1963-12-05 Krauss Maffei Ag Zentrifuge zum Entwaessern von feinstkoernige Feststoffe enthaltenden Schleuderguetern
DE1959011C3 (de) * 1969-11-25 1979-06-28 Krauss-Maffei Ag, 8000 Muenchen Zentrifuge zum Trennen der festen von den flüssigen Bestandteilen von Gemengen
DE2614922A1 (de) * 1976-04-07 1977-10-27 Willi Fritsch Filterkorb fuer kontinuierlich arbeitende zentrifugen
AT359435B (de) * 1977-09-06 1980-11-10 Hutter & Schrantz Ag Siebkorb
DE2749285A1 (de) * 1977-11-03 1979-05-10 Salzgitter Maschinen Ag Kontinuierlich arbeitende zentrifuge

Also Published As

Publication number Publication date
DE3473416D1 (en) 1988-09-22
EP0156935A1 (fr) 1985-10-09

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