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1. US20190358650 - CENTRIFUGAL SEPARATOR

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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Claims

1. A centrifugal separator for separating milk into a cream phase and a skim milk phase, the separator comprising:
a centrifuge bowl,
a disc stack of conical discs arranged inside the centrifuge bowl, the disc stack comprising:
a first set of discs,
a second set of discs,
the discs in the disk stack comprising distribution openings such that the milk passes the first set of discs before passing the second set of discs, wherein
the discs in the first set of discs being separated from each other by a first distance, and
the discs in the second set of discs being separated from each other by a second distance which is smaller than the first distance.
2. The separator according to claim 1, wherein the number of discs in the second set of discs is higher than the number of discs in the first set of discs.
3. The separator according to claim 2, wherein a ratio between the number of discs in the second set of discs to the number of discs in the first set of discs is in a range of 2 to 6.
4. The separator according to claim 2, wherein the number of discs in the first set of discs is in a range of 20 to 50 discs.
5. The separator according to claim 1, wherein a ratio between the first distance and the second distance is in a range of 1.2-2.4, or in the range of 1.25-1.60.
6. The separator according to claim 5, wherein the ratio between the first distance and the second distance is 1.33.
7. The separator according to claim 1, wherein the discs in the first set of discs are separated by 0.75 mm to 0.85 mm.
8. The separator according to claim 1, wherein the discs in the second set of discs are separated by 0.55 mm to 0.65 mm.
9. The separator according to claim 1, wherein discs in the first set of discs have an open center portion for receiving a centering element arranged in the centrifuge bowl.
10. The separator according to claim 9, wherein the discs in the second set of discs have a reduced diameter center portion coaxially aligned with the open center portion of the discs in the first set of discs.
11. A method of separating cold milk using a separator according to claim 1, comprising:
providing a flow of the milk through the first set of discs in the disc stack arranged in the separator, and thereafter
providing the flow of the milk through the second set of discs, which is stacked on top of the first set of discs.
12. The method according to claim 11, wherein the cold milk is milk which is not heated.
13. The method according to claim 12, wherein the temperature of the cold milk is below 30° C.
14. The method according to claim 12, wherein the temperature of the cold milk is below 17° C.
15. The method according to claim 12, wherein the temperature of the cold milk is below 13° C.