EP0953380B1 - Method and device for scraping the crystals from a centrifuge drum - Google Patents
Method and device for scraping the crystals from a centrifuge drum Download PDFInfo
- Publication number
- EP0953380B1 EP0953380B1 EP99102995A EP99102995A EP0953380B1 EP 0953380 B1 EP0953380 B1 EP 0953380B1 EP 99102995 A EP99102995 A EP 99102995A EP 99102995 A EP99102995 A EP 99102995A EP 0953380 B1 EP0953380 B1 EP 0953380B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- skimmer
- bowl
- swivelled
- product
- 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 - Lifetime
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Classifications
-
- 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
- B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
Definitions
- the invention relates to a method for clearing the product from the centrifuge drum of a discontinuous centrifuge and an apparatus for performing this method.
- the clearing device from a swiveling around a vertical clearing bar Ploughshare on which a peeling knife is spring-mounted rotatably.
- the paring knife which extends only over a short height section the centrifuge drum extends against the direction of rotation the centrifuge drum into the product layer, e.g. B. sugar layer pressed in until it touches the working sieve.
- the peeling knife is then moved axially from its uppermost position moved towards the bottom of the drum and is then again move axially upwards before it goes into its Rest position is pivoted out.
- DE 42 11 254 A1 discloses a method and a device for the treatment of sludge and / or waste water. Intended is a drivable, rotatably mounted in a stationary housing inner basket, which is a non-perforated cylindrical Wall and a removal device for the solid content having.
- This removal device comprises a pivot shaft, which is rotatably held in the fixed housing, arms which extend horizontally from the shaft and a scratch, attached to the arms.
- the scratch has a toothed Edge, the vertical length of which is somewhat shorter than the inner Height of the basket.
- the pivot shaft of the removal device can be switched between a hydraulic cylinder Scratch position and a waiting position can be pivoted. Latter is taken when dirty water or used water is introduced into the separator. In the scratch position the scratch is placed near the inner surface of the basket, around the solid part deposited on the inner surface of the basket scrape off or scrape off. When scraping or The inner basket is scraped off at approx. 300 rpm. turned.
- the invention has for its object the product discharge, the discharge time and the remaining product in the centrifuge bowl to optimize.
- This task is related to the method with the features of claim 1 and with respect to the device with the features of claim 7 solved.
- the peeling knife is used during the clearing process controlled radially towards the drum screen, so that the product is peeled off in layers.
- the Avoid clearing device By lifting of the peeling knife from the drum bottom will strike the Avoid clearing device when oscillating the centrifuge.
- there the axial distance achieved by lifting can be about 200 mm amount, so that the peeling knife in its rest state sufficient distance to the internals and the drum edge.
- the efficiency of the product discharge is thereby according to the invention increases that the pivoting of the peeling knife in the direction of rotation the centrifuge drum and its swiveling against this direction of rotation he follows. By swiveling against the direction of rotation The remaining product on the lower edge of the peeling knife becomes the drum spent on product discharge.
- the Swinging in of the peeling knife is stopped immediately before the peeling knife touches the drum sieve. there it is useful to achieve a complete product discharge, when swinging out after reaching the drum screen the peeling knife only after a dwell time of a few Seconds.
- the peeling knife can be controlled pneumatically via electropneumatic Valves.
- Peeling knife is flatly concave on its front.
- the cutting edge of the peeling knife with the Drum screen or drum shell an angle of 80 ° to a little less than 90 °.
- the clearing bar is designed as a tube into which a nozzle assembly or individual nozzles are integrated for a deck or wash water task. Thereby can be a complete assembly from the product room Eliminate centrifuge.
- the schematic representations show a centrifuge drum 1, the drum casing with holes 2 on its inner wall by a not shown Working strainer is covered.
- the drum base 3 has a central one Product outlet opening on by a not shown Locking hood is lockable.
- the direction of rotation of the Centrifuge drum 1 is indicated by an arrow 5.
- An eccentric protrudes perpendicularly into the centrifuge drum 1 from above fixedly arranged clearing device from which only an axially parallel clearing bar 6 and a attached peeling knife 7 are shown.
- the peeling knife 7 can be in the direction swivel onto the drum jacket 2.
- Figure 3 shows the clearing device in the lowered position, in the peeling knife, which extends over the full drum height h 7 is lowered to the drum base 3. Also show Figures 3 and 4, the peeling knife 7 in its pivoted Position in which there is a Sugar layer 9 is present.
- Figure 5 shows the peeling knife 7 in its pivoted position after the peeling process, in which the Cut 7a of the peeling knife 7 immediately before that drawn working sieve of the drum shell 2 is, however without making a metallic contact with this working sieve.
- the cutting edge or cutting edge 7a closes with the Drum screen or drum shell 3 an angle ⁇ , the can be between 80 ° and a little less than 90 °.
- Figure 5 leaves also recognize that the peeling knife seen in horizontal section 7 is formed flat concave on its front side 7b.
- the magma fed into the centrifuge drum 1 is from the centrifugal drum 1 driven at high speed, the mother syrup adhering to the crystals through the Working sieve enters and out of the holes in the drum casing 3 the centrifuge housing, not shown, expires. Subsequently the crystals with a pure liquid washed. Those remaining in the drum after the separation process Crystals form a sugar layer 9 on the working sieve is peeled off from the clearing device. The peeled off Sugar crystals are subordinated after opening the cap Transport units fed.
- Figure 1 shows the clearing device in the raised state, in the lower end of the pivoted peeling knife 7 from the drum base 3 has an axial distance a, which is about 200 mm can be.
- the peeling knife 7 becomes from this idle state already during braking of the centrifuge drum 1 from it Spin speed to the clearing speed axially in the direction of Arrow 10 lowered until the lower end of the peeling knife 7 is immediately above the drum base 3 (see Figure 3). To It will reach the lower position and the clearing speed Swinging the peeling knife 7 in the direction of arrow 8 initiated.
- Figure 4 shows that the pivoting process of the peeling knife 7 in the direction of rotation 5 of the centrifuge drum 1 takes place.
- the peeling the sugar crystals then occur simultaneously over the entire Drum height h with continuous infeed of the peeling knife 7 in the radial direction to the outside.
- the one in front of the peeling knife 7 Line 11 drawn in dashed lines indicates the product flow the crystals peeled from the sugar layer 9 by the peeling knife 7 on.
- the peeling knife 7 has its shown in FIG When the end position is reached, the peeling knife remains for a few seconds in this end position before it returns to its position shown in FIGS and 2 shown starting position is pivoted out.
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- Centrifugal Separators (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Ausräumen des Produktes aus der Zentrifugentrommel einer diskontinuierlichen Zentrifuge sowie eine Vorrichtung zur Durchführung dieses Verfahrens.The invention relates to a method for clearing the product from the centrifuge drum of a discontinuous centrifuge and an apparatus for performing this method.
Bei einer vorbekannten Ausführungsform besteht die Ausräumeinrichtung aus einem um eine lotrechte Räumstange verschwenkbaren Pflugschar, an dem ein Schälmesser federnd drehbar gelagert ist. Das Schälmesser, das sich nur über einen kurzen Höhenabschnitt der Zentrifugentrommel erstreckt, wird entgegen der Drehrichtung der Zentrifugentrommel in die Produktschicht, z. B. Zuckerschicht eingedrückt bis zur Anlage an dem Arbeitssieb. Das Schälmesser wird dann aus seiner obersten Position axial nach unten in Richtung auf den Trommelboden verschoben und wird anschließend wieder axial nach oben verfahren, bevor es in seine Ruhestellung ausgeschwenkt wird.In a previously known embodiment there is the clearing device from a swiveling around a vertical clearing bar Ploughshare on which a peeling knife is spring-mounted rotatably. The paring knife, which extends only over a short height section the centrifuge drum extends against the direction of rotation the centrifuge drum into the product layer, e.g. B. sugar layer pressed in until it touches the working sieve. The The peeling knife is then moved axially from its uppermost position moved towards the bottom of the drum and is then again move axially upwards before it goes into its Rest position is pivoted out.
Die DE 42 11 254 A1 offenbart ein Verfahren sowie eine Vorrichtung zur Behandlung von Schlamm- und/oder Abwasser. Vorgesehen ist ein antreibbarer, in einem stationären Gehäuse drehbar gelagerter innerer Korb, der eine nicht perforierte zylindrische Wand und eine Entfernungsvorrichtung für den Festkörperanteil aufweist. Diese Entfernungsvorrichtung umfaßt eine Schwenkwelle, die drehbar in dem ortsfesten Gehäuse gehalten ist, Arme, die sich horizontal von der Welle aus erstrecken und einen Kratzer, der an den Armen befestigt ist. Der Kratzer weist eine gezahnte Kante auf, deren vertikale Länge etwas kürzer ist als die innere Höhe des Korbes. Die Schwenkwelle der Entfernungsvorrichtung kann durch einen hydraulisch betätigten Zylinder zwischen einer Kratzposition und einer Warteposition verschwenkt werden. Letztere wird eingenommen, wenn Schmutzwasser oder gebrauchtes Wasser in den Separator eingebracht wird. In der Kratzposition wird der Kratzer nahe der inneren Oberfläche des Korbes angeordnet, um den an der inneren Oberfläche des Korbes abgesetzten Festkörperanteil abzukratzen oder abzustreifen. Bei dem Auskratz- oder Ausschabvorgang wird der innere Korb mit ca. 300 U/min. gedreht.DE 42 11 254 A1 discloses a method and a device for the treatment of sludge and / or waste water. Intended is a drivable, rotatably mounted in a stationary housing inner basket, which is a non-perforated cylindrical Wall and a removal device for the solid content having. This removal device comprises a pivot shaft, which is rotatably held in the fixed housing, arms which extend horizontally from the shaft and a scratch, attached to the arms. The scratch has a toothed Edge, the vertical length of which is somewhat shorter than the inner Height of the basket. The pivot shaft of the removal device can be switched between a hydraulic cylinder Scratch position and a waiting position can be pivoted. Latter is taken when dirty water or used water is introduced into the separator. In the scratch position the scratch is placed near the inner surface of the basket, around the solid part deposited on the inner surface of the basket scrape off or scrape off. When scraping or The inner basket is scraped off at approx. 300 rpm. turned.
Der Erfindung liegt die Aufgabe zugrunde, den Produktaustrag, die Austragzeit und den Verbleib von Restprodukt in der Zentrifugentrommel zu optimieren.The invention has for its object the product discharge, the discharge time and the remaining product in the centrifuge bowl to optimize.
Diese Aufgabe wird hinsichtlich des Verfahrens mit den Merkmalen
des Anspruchs 1 und hinsichtlich der Vorrichtung mit den Merkmalen
des Anspruchs 7 gelöst.This task is related to the method with the features
of
Erfindungsgemäß beginnt also nach dem Einschwenken des Schälmessers das Schälen gleichzeitig über die volle Trommelhöhe, wodurch sich gegenüber dem an erster Stelle beschriebenen Stand der Technik die Austragzeit verringert und der Produktaustrag vergleichmäßigt. Überdies wird das Schälmesser während des Ausräumvorganges radial in Richtung auf das Trommelsieb gesteuert, so daß das Produkt schichtweise abgeschält wird. Durch das Anheben des Schälmessers vom Trommelboden wird ein Anschlagen der Ausräumeinrichtung beim Pendeln der Zentrifuge vermieden. Dabei kann der durch das Abheben erzielte axiale Abstand etwa 200 mm betragen, so daß sich das Schälmesser in seinem Ruhezustand in ausreichendem Abstand zu den Einbauten und zum Trommelrand befindet. According to the invention thus begins after the peeling knife has been swung in peeling simultaneously over the full drum height, whereby compared to the status described in the first place the technology reduces the discharge time and the product discharge uniform. In addition, the peeling knife is used during the clearing process controlled radially towards the drum screen, so that the product is peeled off in layers. By lifting of the peeling knife from the drum bottom will strike the Avoid clearing device when oscillating the centrifuge. there the axial distance achieved by lifting can be about 200 mm amount, so that the peeling knife in its rest state sufficient distance to the internals and the drum edge.
Zur Verkürzung der Ausräumzeit ist es zweckmäßig, wenn das Absenken des Schälmessers bereits während des Abbremsens der Zentrifugentrommel von ihrer Schleuderdrehzahl auf die Räumdrehzahl erfolgt.To reduce the clearing time, it is useful if the lowering the peeling knife while the centrifuge drum is braking from their spin speed to the clearing speed he follows.
Die Effizienz des Produktaustrags wird erfindungsgemäß dadurch erhöht, dass das Einschwenken des Schälmessers in Drehrichtung der Zentrifugentrommel und sein Ausschwenken gegen diese Drehrichtung erfolgt. Durch das Ausschwenken gegen die Drehrichtung der Trommel wird das Restprodukt an der unteren Kante des Schälmessers zum Produktaustrag verbracht.The efficiency of the product discharge is thereby according to the invention increases that the pivoting of the peeling knife in the direction of rotation the centrifuge drum and its swiveling against this direction of rotation he follows. By swiveling against the direction of rotation The remaining product on the lower edge of the peeling knife becomes the drum spent on product discharge.
Zur Verringerung des Verschleißes des Arbeitssiebes sowie des Schälmessers kann erfindungsgemäß vorgesehen werden, dass der Einschwenkvorgang des Schälmessers gestoppt wird unmittelbar bevor das Schälmesser das Trommelsieb metallisch berührt. Dabei ist es zur Erzielung eines vollständigen Produktaustrages zweckmäßig, wenn nach dem Erreichen des Trommelsiebes das Ausschwenken des Schälmessers erst nach einer Verharrzeit von einigen Sekunden erfolgt.To reduce the wear of the working screen and the Peeling knife can be provided according to the invention that the Swinging in of the peeling knife is stopped immediately before the peeling knife touches the drum sieve. there it is useful to achieve a complete product discharge, when swinging out after reaching the drum screen the peeling knife only after a dwell time of a few Seconds.
Die Steuerung des Schälmessers kann pneumatisch über elektropneumatische Ventile erfolgen.The peeling knife can be controlled pneumatically via electropneumatic Valves.
Um einen störungsfreien Produktabtransport beim Schälvorgang zu erzielen, ist es zweckmäßig, wenn im Horizontalschnitt das Schälmesser auf seiner Vorderseite flach konkav ausgebildet ist. Um außerdem den Verschleiß an der Schneidkante des Schälmessers zu verringern und eine schonende Siebreinigung zu erzielen, ist es vorteilhaft, wenn die Schneidkante des Schälmessers mit dem Trommelsieb bzw. dem Trommelmantel einen Winkel von 80° bis etwas kleiner 90° einschließt.To ensure trouble-free product removal during the peeling process achieve, it is useful if in the horizontal section Peeling knife is flatly concave on its front. In addition to the wear on the cutting edge of the peeling knife to reduce and achieve a gentle screen cleaning is it is advantageous if the cutting edge of the peeling knife with the Drum screen or drum shell an angle of 80 ° to a little less than 90 °.
Um Produktanbackungen am Schälmesser zu vermeiden und den Produktfluß weiter zu verbessern, kann das Schälmesser erfindungsgemäß eine Antihaftbeschichtung aufweisen. To avoid product caking on the peeling knife and the product flow To further improve the peeling knife according to the invention have a non-stick coating.
In einer Weiterbildung der erfindungsgemäßen Ausgestaltung ist es bei einer Zuckerzentrifuge vorteilhaft, wenn die Räumstange als Rohr ausgebildet ist, in das ein Düsenstock oder Einzeldüsen für eine Deck- bzw. Waschwasser-Aufgabe integriert sind. Dadurch läßt sich eine vollständige Baugruppe aus dem Produktraum der Zentrifuge eliminieren.In a further development of the configuration according to the invention it is beneficial in a sugar centrifuge if the clearing bar is designed as a tube into which a nozzle assembly or individual nozzles are integrated for a deck or wash water task. Thereby can be a complete assembly from the product room Eliminate centrifuge.
Weitere Merkmale der Erfindung sind Gegenstand der Unteransprüche und werden in Verbindung mit weiteren Vorteilen der Erfindung anhand eines Ausführungsbeispieles näher erläutert.Further features of the invention are the subject of the dependent claims and are in connection with further advantages of the invention explained in more detail using an exemplary embodiment.
In der Zeichnung ist eine als Beispiel dienende Ausführungsform der Erfindung schematisch dargestellt. Es zeigen:
-
Figur 1 - in einem lotrechten Mittelschnitt die linke Hälfte der Zentrifugentrommel einer diskontinuierlichen Zuckerzentrifuge mit einer in diese von oben lotrecht hineinragenden, sich in angehobener Stellung befindlichen Ausräumeinrichtung mit ausgeschwenktem Schälmesser;
-
Figur 2 - die Darstellung gemäß
Figur 1 in Draufsicht; -
Figur 3 - in einer Darstellung gemäß
Figur 1 die Ausräumeinrichtung in abgesenkter Stellung mit eingeschwenktem Schälmesser; - Figur 4
- die Darstellung gemäß
Figur 3 in Draufsicht und -
Figur 5 - in gegenüber den
Figuren 1 bis 4 vergrößertem Maßstab in einem Horizontalschnitt das Schälmesser in eingeschwenkter Position.
- Figure 1
- in a vertical central section, the left half of the centrifuge drum of a discontinuous sugar centrifuge with a clearing device protruding vertically from above and in a raised position with the peeling knife swung out;
- Figure 2
- the representation of Figure 1 in plan view;
- Figure 3
- in a representation according to Figure 1, the clearing device in the lowered position with the peeling knife swung in;
- Figure 4
- the representation of Figure 3 in plan view and
- Figure 5
- on a larger scale than in FIGS. 1 to 4, in a horizontal section, the peeling knife in the pivoted-in position.
Die schematischen Darstellungen zeigen im Ausschnitt eine Zentrifugentrommel
1, deren mit Bohrungen versehener Trommelmantel
2 auf seiner Innenwandung durch ein nicht näher dargestelltes
Arbeitssieb abgedeckt ist. Der Trommelboden 3 weist eine zentrische
Produkt-Ausfallöffnung auf, die durch eine nicht näher dargestellte
Verschlußhaube verschließbar ist. Die Drehrichtung der
Zentrifugentrommel 1 ist durch einen Pfeil 5 gekennzeichnet.The schematic representations show a
In die Zentrifugentrommel 1 ragt von oben lotrecht eine exzentrisch
ortsfest angeordnete Ausräumeinrichtung hinein, von der
lediglich eine achsparallel angeordnete Räumstange 6 sowie ein
an dieser befestigtes Schälmesser 7 dargestellt sind. Durch
Drehung der Räumstange 6 in Richtung des eingezeichneten Pfeiles
8 (siehe Figuren 3 und 4) läßt sich das Schälmesser 7 in Richtung
auf den Trommelmantel 2 verschwenken.An eccentric protrudes perpendicularly into the
Figur 3 zeigt die Ausräumeinrichtung in abgesenkter Position, in
der das sich über die volle Trommelhöhe h erstreckende Schälmesser
7 bis auf den Trommelboden 3 abgesenkt ist. Außerdem zeigen
die Figuren 3 und 4 das Schälmesser 7 in seiner eingeschwenkten
Stellung, in der es zu Beginn des Ausräumvorganges an einer
Zuckerschicht 9 anliegt.Figure 3 shows the clearing device in the lowered position, in
the peeling knife, which extends over the full
Figur 5 zeigt das Schälmesser 7 in seiner eingeschwenkten Stellung
nach Beendigung des Abschälvorganges, bei dem sich die
Schneide 7a des Schälmessers 7 unmittelbar vor dem nicht näher
eingezeichneten Arbeitssieb des Trommelmantels 2 befindet, jedoch
ohne einen metallischen Kontakt mit diesem Arbeitssieb herzustellen.
Die Schneidkante bzw. Schneide 7a schließt mit dem
Trommelsieb bzw. dem Trommelmantel 3 einen Winkel α ein, der
zwischen 80° und etwas kleiner 90° liegen kann. Figur 5 läßt
ferner erkennen, daß im Horizontalschnitt gesehen das Schälmesser
7 auf seiner Vorderseite 7b flach konkav ausgebildet ist.Figure 5 shows the
Das in die Zentrifugentrommel 1 aufgegebene Magma wird von der
hochtourig angetriebenen Zentrifugentrommel 1 abgeschleudert,
wobei der an den Kristallen anhaftende Muttersirup durch das
Arbeitssieb tritt und aus den Bohrungen des Trommelmantels 3 in
das nicht näher dargestellte Zentrifugengehäuse abläuft. Anschließend
werden die Kristalle mit einer reinen Flüssigkeit
gewaschen. Die nach dem Trennprozeß in der Trommel verbleibenden
Kristalle bilden auf dem Arbeitssieb eine Zuckerschicht 9, die
von der Ausräumeinrichtung abschält wird. Die abgeschälten
Zuckerkristalle werden nach Öffnung der Verschlußhaube nachgeordneten
Transporteinheiten zugeführt.The magma fed into the
Figur 1 zeigt die Ausräumeinrichtung in angehobenem Zustand, in
der das untere Ende des abgeschwenkten Schälmessers 7 vom Trommelboden
3 einen axialen Abstand a aufweist, der etwa 200 mm
betragen kann. Aus diesem Ruhezustand wird das Schälmesser 7
bereits während des Abbremsens der Zentrifugentrommel 1 von ihrer
Schleuderdrehzahl auf die Räumdrehzahl axial in Richtung des
Pfeiles 10 abgesenkt, bis das untere Ende des Schälmessers 7
unmittelbar über dem Trommelboden 3 liegt (siehe Figur 3). Nach
Erreichen der unteren Position und der Räumdrehzahl wird das
Einschwenken des Schälmessers 7 in Richtung des Pfeiles 8 eingeleitet.Figure 1 shows the clearing device in the raised state, in
the lower end of the pivoted peeling
Figur 4 zeigt, daß der Einschwenkvorgang des Schälmessers 7 in
der Drehrichtung 5 der Zentrifugentrommel 1 erfolgt. Das Abschälen
der Zuckerkristalle erfolgt dann gleichzeitig über die gesamte
Trommelhöhe h unter kontinuierlicher Zustellung des Schälmessers
7 in radialer Richtung nach außen. Die vor dem Schälmesser
7 gestrichelt eingezeichnete Linie 11 deutet den Produktfluß
der vom Schälmesser 7 aus der Zuckerschicht 9 abgeschälten Kristalle
an. Hat dann das Schälmesser 7 seine in Figur 5 gezeigte
Endstellung erreicht, verharrt das Schälmesser einige Sekunden
in dieser Endstellung, bevor es wieder in seine in den Figuren 1
und 2 dargestellte Ausgangsstellung ausgeschwenkt wird. Durch
das Ausschwenken des Schälmessers 7 gegen die Drehrichtung 5 der
Zentrifugentrommel 1 wird der an der unteren Kante des Schälmessers
7 befindliche Restzucker zur zentralen Ausfallöffnung im
Trommelboden 3 verbracht. Anschließend wird dann die Räumstange
6 mit dem Schälmesser 7 wieder um das Maß a axial angehoben in
die in Figur 1 gezeigte Ruhestellung.Figure 4 shows that the pivoting process of the peeling
Claims (11)
- A method for discharging the product from the centrifuge bowl (1) of a discontinuous centrifuge, in which a skimmer (7) is swivelled into the centrifuged product layer (sugar layer 9) and here skims the product with a blade (7a) directed counter to the direction of bowl rotation (arrow 5),
wherein, after being swivelled in, the skimmer (7) is in contact with the product over virtually the entire bowl height (h), skims the product in layers from the product layer (9) rotating at discharge speed simultaneously over the entire bowl height (h) and is swivelled out again upon reaching the bowl screen, and
wherein the skimmer (7), before being swivelled in, is lowered slightly in the axial direction (10) into the centrifuge bowl (1) onto the bowl bottom (3) and, after being swivelled out, is raised again from the bowl bottom (3) by a corresponding axial distance (a). - A method according to claim 1, characterised in that the skimmer (7) is lowered during braking of the centrifuge bowl (1) from the centrifuging speed thereof to the discharge speed.
- A method according to claim 1 or claim 2, characterised in that, after reaching the bowl screen, the skimmer (7) is swivelled out only after a pause of a few seconds.
- A method according to one of the preceding claims, characterised in that swivelling in of the skimmer (7) proceeds in the direction of rotation (5) of the centrifuge bowl (1) and swivelling out thereof proceeds counter to this direction of rotation (5).
- A method according to one of the preceding claims, characterised in that the process of swivelling in the skimmer (7) is stopped immediately before the skimmer (7) comes into metallic contact with the bowl screen.
- A method according to one of the preceding claims, characterised in that the skimmer (7) is controlled pneumatically.
- A device for performing the method according to claim 1, having a skimmer (7) attached to a discharge rod (6) and swivellable thereby or therearound, which skimmer (7), in its swivelled-in position, acts on the product layer (9) with a blade (7a) acting in the opposite direction from that of bowl rotation,
wherein, when the skimmer (7) is swivelled in, the blade (7a) extends over virtually the entire bowl height (h), and
having a raising, lowering and swivelling means, by means of which the skimmer (7) located in the swivelled-out position may be lowered as far as onto the bowl bottom (3), then swivelled in towards the product layer (9), swivelled back out after completion of the skimming process and then raised again from the bowl bottom (3). - A device according to claim 7, characterised in that, in horizontal section, the skimmer (7) is of shallowly concave construction on its front side (7b).
- A device according to claim 7 or claim 8, characterised in that the cutting edge (7a) of the skimmer (7) forms an angle (α) of from 80° to somewhat less than 90° with the bowl screen or the bowl shell (3).
- A device according to one of claims 7 to 9, characterised in that the skimmer (7) comprises an nonstick coating.
- A device according to one of claims 7 to 10, characterised in that the discharge rod (6) takes the form of a tube into which there is/are incorporated a nozzle stock or individual nozzles for washwater feed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19819065 | 1998-04-29 | ||
| DE19819065A DE19819065C1 (en) | 1998-04-29 | 1998-04-29 | Semidry sugar beet fiber residue removal from centrifuge wall |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0953380A2 EP0953380A2 (en) | 1999-11-03 |
| EP0953380A3 EP0953380A3 (en) | 2000-06-07 |
| EP0953380B1 true EP0953380B1 (en) | 2002-08-21 |
Family
ID=7866108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99102995A Expired - Lifetime EP0953380B1 (en) | 1998-04-29 | 1999-02-16 | Method and device for scraping the crystals from a centrifuge drum |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6177021B1 (en) |
| EP (1) | EP0953380B1 (en) |
| DE (2) | DE19819065C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011119265A1 (en) * | 2011-11-24 | 2013-05-29 | Bma Braunschweigische Maschinenbauanstalt Ag | Discontinuous centrifuge with scraper for removing a product |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10135979B4 (en) | 2001-07-24 | 2004-02-19 | Karl Storz Gmbh & Co. Kg | Medical instrument |
| FR3011192A1 (en) * | 2013-09-30 | 2015-04-03 | Fives Cail Babcock | DISCONTINUOUS SPINNER |
| DE102017205551A1 (en) * | 2017-03-31 | 2018-10-04 | Krones Ag | Bottle treating machine and method for cleaning the pump / nozzle guard of the bottle treating machine |
| CN107094820A (en) * | 2017-05-31 | 2017-08-29 | 平湖市凯宇鲜菜有限公司 | A kind of skin of beancurd sharing device |
| CN111225728B (en) * | 2018-05-15 | 2022-04-05 | 株式会社荒井铁工所 | Shearing member and filtering device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE558786A (en) * | 1955-10-19 | |||
| IT1254625B (en) | 1991-11-19 | 1995-09-28 | DEVICE AND PROCEDURE FOR TREATMENT OF SLUDGE AND WASTE WATERS. | |
| GB9221956D0 (en) * | 1992-10-20 | 1992-12-02 | Broadbent & Sons Ltd Thomas | Particle separation and drying apparatus |
| US5443726A (en) * | 1993-10-13 | 1995-08-22 | Tm Industrial Supply, Inc. | Self-cleaning filter assembly |
| US5733238A (en) * | 1995-10-24 | 1998-03-31 | Carr Separations, Inc. | Scraping assembly having angularly offset scraper blades for removing solids from an imperforate bowl centrifuge |
| JP3313286B2 (en) * | 1996-01-17 | 2002-08-12 | 株式会社松本機械製作所 | Centrifugal filtration method and device |
-
1998
- 1998-04-29 DE DE19819065A patent/DE19819065C1/en not_active Expired - Fee Related
-
1999
- 1999-02-16 DE DE59902395T patent/DE59902395D1/en not_active Expired - Lifetime
- 1999-02-16 EP EP99102995A patent/EP0953380B1/en not_active Expired - Lifetime
- 1999-04-29 US US09/301,624 patent/US6177021B1/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011119265A1 (en) * | 2011-11-24 | 2013-05-29 | Bma Braunschweigische Maschinenbauanstalt Ag | Discontinuous centrifuge with scraper for removing a product |
| WO2013076074A1 (en) | 2011-11-24 | 2013-05-30 | Bma Braunschweigische Maschinenbauanstalt Ag | Discontinuous centrifuge comprising a scraper for scraping away a product |
| DE102011119265B4 (en) | 2011-11-24 | 2018-01-04 | Bma Braunschweigische Maschinenbauanstalt Ag | Discontinuous centrifuge with scraper for removing a product |
Also Published As
| Publication number | Publication date |
|---|---|
| US6177021B1 (en) | 2001-01-23 |
| DE19819065C1 (en) | 1999-10-14 |
| DE59902395D1 (en) | 2002-09-26 |
| EP0953380A2 (en) | 1999-11-03 |
| EP0953380A3 (en) | 2000-06-07 |
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