EP0031111B1 - Continuously operating centrifuge - Google Patents
Continuously operating centrifuge Download PDFInfo
- Publication number
- EP0031111B1 EP0031111B1 EP80107887A EP80107887A EP0031111B1 EP 0031111 B1 EP0031111 B1 EP 0031111B1 EP 80107887 A EP80107887 A EP 80107887A EP 80107887 A EP80107887 A EP 80107887A EP 0031111 B1 EP0031111 B1 EP 0031111B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- centrifugal
- curing
- centrifuge
- clamping ring
- 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
Links
- 239000007788 liquid Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- B04B7/18—Rotary bowls formed or coated with sieving or filtering elements
Definitions
- the invention relates to a continuously operating centrifuge for centrifuging suspensions with crystalline solids, in particular a sugar centrifuge, with a centrifugally expanding centrifugal drum at the discharge end, on the inner surface of which a sieve attached to the lower edge by means of a clamping ring rests for the centrifugation of the liquid.
- Centrifuges of this type are used to spin off sugar filling masses, salt suspensions or other mixtures with crystalline solids. So that only the crystalline materials of the Central i be retained fugensieb, these filters must be very fine perforated, which in turn makes a small screen thickness required. Such thin screens are subject to great wear and tear and must therefore be able to be replaced quickly and safely.
- the sieves are held on the lower edge of the sieve by clamping effects (DE-A-2 222 602). With large drums, in particular, adequate fastening is not possible because the tensile forces acting on the screens are greater than the clamping forces.
- the screens in large drums consist of several parts because a one-piece screen is difficult to manufacture and assemble.
- Both the centrifugal drum and the clamping cone are not always precisely machined, so that the known clamping attachment of the screen between the clamping ring and the drum jacket is very disadvantageous.
- the drum jacket is not exactly round, it is not possible to achieve uniform clamping effects over the entire circumference. As a result, it cannot be avoided that individual sieve segments fly out during operation.
- the invention has for its object to provide a simple and secure attachment of the deck screens, which is effective even with inaccurately processed centrifuge parts such as drum jacket, clamping ring and the like.
- a holding plate is connected to the lower edge of the sieve and lies in a recess of the clamping ring which is recessed on the outer surface facing the centrifugal drum.
- the sieve is not only clamped, but additionally hung in, so that the tensile forces occurring during operation are absorbed solely by the holding plate.
- a particularly simple fastening of the holding plate to the sieve is achieved by means of spot welding.
- Other similar fastenings such as soldering and the like are also possible.
- the centrifuge essentially consists of a drum jacket 1, a base 2 with a hub 3, an accelerator pot 4 and an accelerator cone 5.
- a clamping ring 6 is pressed against the drum jacket 1 by means of the screws 7, the centrifuge sieve being inserted between the drum jacket 1 and the clamping ring 6 .
- the centrifuge drive is not shown.
- the clamping ring 6 is provided on its outer surface 6a with a recess 6b into which a holding plate 9 is inserted which is fixedly connected to the centrifuge sieve 8.
- a coarser support screen 10 can also be inserted between the drum jacket 1 and the deck screen 8.
- Both sieves are designed on the upper edge of the drum so that the dry spun sugar or the like flows out over the flange 17 of a cone 11 and the spun off liquid is discharged through the support sieve 10 upwards and between the flange 17 and the flange 16 of the drum 1. Clamping pieces 18 ensure free passage of the liquid.
- the centrifuge screen consists of several segments 8a, which are individually inserted into the centrifuge.
- Each segment is provided at the lower edge 12 with a holding plate 9a.
- this edge 12 of the segment 8a is not perforated.
- the side edges 13 are also imperforate.
- segment 8a is shown with two perforations 14 and 15 running in different directions.
- the retaining plates 9 inserted loosely into the openings 6b of the clamping cone 6 ensure that the sieve 8 is securely fastened, which is securely and sufficiently locked even in the event of excessive tensile forces.
Landscapes
- Centrifugal Separators (AREA)
- Paper (AREA)
Description
Die Erfindung betrifft eine kontinuierlich arbeitende Zentrifuge zum Abschleudern von Suspensionen mit kristallinen Feststoffen, insbesondere Zuckerzentrifuge, mit einer sich zum Austragsende konisch erweiternden Schleudertrommel, auf deren Innenfläche zum Abschleudem der Flüssigkeit ein am unteren Rand mittels eines Klemmringes befestigtes Sieb aufliegt.The invention relates to a continuously operating centrifuge for centrifuging suspensions with crystalline solids, in particular a sugar centrifuge, with a centrifugally expanding centrifugal drum at the discharge end, on the inner surface of which a sieve attached to the lower edge by means of a clamping ring rests for the centrifugation of the liquid.
Derartige Zentrifugen werden zum Abschleudern von Zuckerfüllmassen, Salzsuspensionen oder anderen Gemischen mit kristallinen Feststoffen eingesetzt. Damit nur die kristallinen Stoffe von dem Zentrifugensieb zurückgehalten werden, müssen diese Siebe sehr fein perforiert sein, was wiederum eine geringe Siebdicke erforderlich macht. Derart dünne Siebe unterliegen einem großen Verschleiß und müssen folglich schnell und sicher ausgewechselt werden können. Bei den bekannten Zentrifugen werden die Siebe am unteren Siebrand durch Klemmwirkungen gehalten (DE-A-2 222 602). Insbesondere bei Großtrommeln ist damit keine ausreichende Befestigung möglich, weil die auf die Siebe wirkenden Zugkräfte größer sind als die Klemmkräfte.Centrifuges of this type are used to spin off sugar filling masses, salt suspensions or other mixtures with crystalline solids. So that only the crystalline materials of the Central i be retained fugensieb, these filters must be very fine perforated, which in turn makes a small screen thickness required. Such thin screens are subject to great wear and tear and must therefore be able to be replaced quickly and safely. In the known centrifuges, the sieves are held on the lower edge of the sieve by clamping effects (DE-A-2 222 602). With large drums, in particular, adequate fastening is not possible because the tensile forces acting on the screens are greater than the clamping forces.
Außerdem bestehen die Siebe bei Großtrommeln aus mehreren Teilen, weil sich ein einteiliges Sieb nur schwer herstellen und montieren läßt. Sowohl die Schleudertrommel als auch der Klemmkegel sind nicht immer genau bearbeitet, so daß die an sich bekannte Klemmbefestigung des Siebes zwischen Klemmring und Trommelmantel sehr nachteilig ist. Besonders dann, wenn der Trommelmantel nicht genau rund ist, lassen sich keine gleichmäßigen Klemmwirkungen über den gesamten Umfang erzielen. Demzufolge ist es nicht zu vermeiden, daß einzelne Siebsegmente während des Betriebes herausfliegen.In addition, the screens in large drums consist of several parts because a one-piece screen is difficult to manufacture and assemble. Both the centrifugal drum and the clamping cone are not always precisely machined, so that the known clamping attachment of the screen between the clamping ring and the drum jacket is very disadvantageous. Especially when the drum jacket is not exactly round, it is not possible to achieve uniform clamping effects over the entire circumference. As a result, it cannot be avoided that individual sieve segments fly out during operation.
Der Erfindung liegt die Aufgabe zugrunde, eine einfache und sichere Befestigung der Decksiebe zu schaffen, die auch bei ungenau bearbeiteten Zentrifugenteilen wie Trommelmantel, Klemmring und dergleichen wirksam ist.The invention has for its object to provide a simple and secure attachment of the deck screens, which is effective even with inaccurately processed centrifuge parts such as drum jacket, clamping ring and the like.
Diese Aufgabe wird dadurch gelöst, daß mit dem unteren Rand des Siebes ein Halteblech verbunden ist, das in einer an der äußeren, der Schleudertrommel zugekehrten Fläche eingelassenen Ausnehmung des Klemmringes einliegt.This object is achieved in that a holding plate is connected to the lower edge of the sieve and lies in a recess of the clamping ring which is recessed on the outer surface facing the centrifugal drum.
Mit dieser Maßnahme wird das Sieb nicht nur eingeklemmt, sondern zusätzlich noch eingehängt, so daß die im Betrieb auftretenden Zugkräfte allein von dem Halteblech aufgefangen werden.With this measure, the sieve is not only clamped, but additionally hung in, so that the tensile forces occurring during operation are absorbed solely by the holding plate.
Eine besonders einfache Befestigung des Haltebleches mit dem Sieb wird mittels Punktschweißungen erreicht. Auch andere gleichartige Befestigungen wie Löten und dergleichen sind möglich.A particularly simple fastening of the holding plate to the sieve is achieved by means of spot welding. Other similar fastenings such as soldering and the like are also possible.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im nachfolgenden näher beschrieben.An embodiment of the invention is shown in the drawing and is described in more detail below.
Es zeigt :
- Figur 1 einen Schnitt durch die Zentrifuge,
Figur 2 eine vergrößerte Darstellung im Bereich des Haltebleches,Figur 3 das Sieb mit dem Halteblech,- Figur 4 ein Siebsegment.
- FIG. 1 shows a section through the centrifuge,
- FIG. 2 shows an enlarged view in the area of the holding plate,
- FIG. 3 the sieve with the holding plate,
- Figure 4 shows a sieve segment.
Die Zentrifuge besteht im wesentlichen aus einem Trommelmäntel 1, einem Boden 2 mit Nabe 3, einem Beschleunigertopf 4 und einem Beschleunigerkegel 5. Ein Klemmring 6 wird mittels der Schrauben 7 gegen den Trommelmantel 1 gedrückt, dabei ist das Zentrifugensieb zwischen Trommelmantel 1 und Klemmring 6 eingelegt. Der Zentrifugenantrieb ist nicht dargestellt. Der Klemmring 6 ist an seiner äußeren Fläche 6a mit einer Ausnehmung 6b versehen, in die ein mit dem Zentrifugensieb 8 fest verbundenes Halteblech 9 eingelegt ist. Außer einem feinen Decksieb 8 kann noch ein gröberes Stützsieb 10 zwischen Trommelmantel 1 und Decksieb 8 eingelegt sein. Beide Siebe sind am oberen Trommelrand so ausgestaltet, daß der trocken geschleuderte Zucker oder dergleichen über den Flansch 17 eines Kegels 11 abströmt und die abgeschleuderte Flüssigkeit durch das Stützsieb 10 nach oben und zwischen dem Flansch 17 und dem Flansch 16 der Trommel 1 abgeführt wird. Klemmstücke 18 sorgen für einen freien Übertritt der Flüssigkeit.The centrifuge essentially consists of a drum jacket 1, a
Das Zentrifugensieb besteht aus mehreren Segmenten 8a, die einzeln in die Zentrifuge eingelegt sind.The centrifuge screen consists of
Jedes Segment ist am unteren Rand 12 mit einem Halteblech 9a versehen. Zu diesem Zweck ist dieser Rand 12 des Segmentes 8a unperforiert. Ebenso sind die Seitenränder 13 unperforiert. Im Ausführungsbeispiel ist das Segment 8a mit zwei in unterschiedlicher Richtung verlaufenden Perforationen 14 und 15 dargestellt.Each segment is provided at the
Die lose in die Öffnungen 6b der Klemmkegels 6 eingelegten Haltebleche 9 sorgen für eine einwandfreie Befestigung des Siebes 8, das auch bei überhöhten Zugkräften sicher und ausreichend arretiert ist.The
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792951556 DE2951556C2 (en) | 1979-12-21 | 1979-12-21 | Continuously working centrifuge |
DE2951556 | 1979-12-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0031111A1 EP0031111A1 (en) | 1981-07-01 |
EP0031111B1 true EP0031111B1 (en) | 1983-08-24 |
Family
ID=6089147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80107887A Expired EP0031111B1 (en) | 1979-12-21 | 1980-12-13 | Continuously operating centrifuge |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0031111B1 (en) |
DE (1) | DE2951556C2 (en) |
NL (1) | NL188565C (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3441970C1 (en) * | 1984-11-16 | 1986-02-13 | Maxs Ag, Sachseln | Metal filter foil |
DE3825640C2 (en) * | 1988-07-28 | 1997-12-18 | Aeg Hausgeraete Gmbh | Sieve basket for a juice centrifuge |
AU708438B2 (en) * | 1994-01-24 | 1999-08-05 | Tema Engineers Pty Limited | Pre-dewatering cone |
AUPM350194A0 (en) * | 1994-01-24 | 1994-02-17 | Tema Engineers Pty Ltd | Centrifuge for the dewatering of particulate material |
DE4443777A1 (en) * | 1994-12-08 | 1996-06-13 | Krauss Maffei Ag | Discontinuously operating filter centrifuge with drum and sliding base |
DE19729036B4 (en) * | 1997-07-08 | 2005-08-11 | Hein, Lehmann Trenn- und Fördertechnik GmbH | Screen plate with tensioning aid |
US6761821B2 (en) * | 2002-09-23 | 2004-07-13 | Weatherford/Lamb, Inc. | Clamping-hook ring |
DE102004057859A1 (en) * | 2004-11-30 | 2006-06-01 | Siebtechnik Gmbh | Centrifuge basket comprises an outer conical basket and sieve elements which are fixed to it using clamping members |
EP1935499A1 (en) * | 2006-12-21 | 2008-06-25 | Ferrum AG | Centrifuge drum |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1047726B (en) * | 1956-09-27 | 1958-12-24 | Guenter Nebel | Continuously working centrifuge |
DE2222602A1 (en) * | 1971-05-26 | 1972-12-07 | Stassfurt Veb Chemieanlagenbau | Continuous centrifuge - with conical drum |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1099464B (en) * | 1958-09-24 | 1961-02-09 | Braunschweigische Maschb Ansta | Conical, closed ring sieve for the spinning drum of a centrifuge |
-
1979
- 1979-12-21 DE DE19792951556 patent/DE2951556C2/en not_active Expired
-
1980
- 1980-12-13 EP EP80107887A patent/EP0031111B1/en not_active Expired
- 1980-12-19 NL NL8006940A patent/NL188565C/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1047726B (en) * | 1956-09-27 | 1958-12-24 | Guenter Nebel | Continuously working centrifuge |
DE2222602A1 (en) * | 1971-05-26 | 1972-12-07 | Stassfurt Veb Chemieanlagenbau | Continuous centrifuge - with conical drum |
Also Published As
Publication number | Publication date |
---|---|
NL8006940A (en) | 1981-07-16 |
NL188565C (en) | 1992-08-03 |
DE2951556A1 (en) | 1981-07-02 |
DE2951556C2 (en) | 1984-03-01 |
EP0031111A1 (en) | 1981-07-01 |
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