EP0156935A1 - Tambour centrifuge pour centrifugeuse travaillant en continu - Google Patents

Tambour centrifuge pour centrifugeuse travaillant en continu Download PDF

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Publication number
EP0156935A1
EP0156935A1 EP84103644A EP84103644A EP0156935A1 EP 0156935 A1 EP0156935 A1 EP 0156935A1 EP 84103644 A EP84103644 A EP 84103644A EP 84103644 A EP84103644 A EP 84103644A EP 0156935 A1 EP0156935 A1 EP 0156935A1
Authority
EP
European Patent Office
Prior art keywords
drum
casing
centrifugal
drain
welded
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.)
Granted
Application number
EP84103644A
Other languages
German (de)
English (en)
Other versions
EP0156935B1 (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 EP19840103644 priority Critical patent/EP0156935B1/fr
Priority to DE8484103644T priority patent/DE3473416D1/de
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 centrifuges, in particular sugar centrifuges, which has a truncated cone-shaped drum shell made from chip-free sheet metal, which is separated to form drain grooves for the liquid phase of the centrifugal material in at least two jacket parts which are separated by a distance in the drum axis direction and which are separated by connecting elements arranged on the outside of the jacket and welded to the jacket parts are connected.
  • the drum jackets were perforated in continuously operating sugar centrifuges so that at least the so-called green runoff, i.e. the liquid phase contained in the filling compound, which forms a portion of around 50%, after passing through the inside of the centrifugal drum, on a coarse backing sieve supported as quickly as possible should come out of the centrifugal drum. Since the holes also followed each other 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 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 without cutting from sheet metal, grooves of such a depth and width which would ensure that the drain does not move upward cannot be worked in because of the small wall thickness.
  • the non-cutting drums are not so 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-OS 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, in the direction of the cone-producing cone 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.
  • the object of the invention is to design a centrifugal drum for continuously operating sugar centrifuges to form drain grooves consisting of at least two jacket parts in such a way that the advantages of non-cutting shaping from sheet metal are retained.
  • the centrifugal drum of the type mentioned is characterized according to the invention in that the connecting elements are designed as flat tabs running in the direction of the cone-producing ends of the drum shell, distributed at equal mutual distances over the drum circumference and additionally welded to the inside edges of the shell parts.
  • the production of the centrifugal drums 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 corresponding to the drain groove is stuck 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 design according to DE-OS 27 49 285.
  • the drain groove can be of any width to ensure that the drain is reliably derived. 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-mesh backing fabric and a separating screen lying thereon.
  • two wide drain grooves 6 a strip corresponding to the width of the respective drain groove 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 groove 6.
  • each tab 10 is provided with an additional drainage hole 11 on its center.
  • Tabs 10 and jacket 2 consist of corrosion-resistant and tough, alloyed steels of suitable strength.

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  • Centrifugal Separators (AREA)
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
EP19840103644 EP0156935B1 (fr) 1984-04-03 1984-04-03 Tambour centrifuge pour centrifugeuse travaillant en continu
DE8484103644T DE3473416D1 (en) 1984-04-03 1984-04-03 A centrifuge drum for a continuously operating centrifuge

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 true EP0156935A1 (fr) 1985-10-09
EP0156935B1 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)

Citations (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
DE1959011A1 (de) * 1969-11-25 1971-05-27 Krauss Maffei Ag Zentrifuge zum Trennen der festen von den fluessigen Bestandteilen von Gemengen
FR2347104A1 (fr) * 1976-04-07 1977-11-04 Fritsch Willi Panier filtreur pour centrifugeuses fonctionnant en continu
DE2838349A1 (de) * 1977-09-06 1979-03-15 Hutter & Schrantz Ag Siebkorb
DE2749285A1 (de) * 1977-11-03 1979-05-10 Salzgitter Maschinen Ag Kontinuierlich arbeitende zentrifuge

Patent Citations (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
DE1959011A1 (de) * 1969-11-25 1971-05-27 Krauss Maffei Ag Zentrifuge zum Trennen der festen von den fluessigen Bestandteilen von Gemengen
FR2347104A1 (fr) * 1976-04-07 1977-11-04 Fritsch Willi Panier filtreur pour centrifugeuses fonctionnant en continu
DE2838349A1 (de) * 1977-09-06 1979-03-15 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
EP0156935B1 (fr) 1988-08-17

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