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Continuously operating centrifuge drum for the sterilization of liquids
| Details |
Inventors: Hemfort, Heinrich;
Assignee: Westfalia Separator AG (Oelde, DT)
Primary Examiner: Krizmanich; George H.
Assistant Examiner:
Attorney, Agent or Firm: Burgess, Dinklage & Sprung
Centrifuge for use in sterilization of liquids, e.g., milk, by removal of bacteria as a sludge or concentrate. A chamber (e.g., 13) for the concentrate is disposed outwardly of the drum separating chamber (e.g., 9) and communicates with the separating chamber via a narrow gap (e.g., 12). Passageways (e.g., 14) are provided for discharge of the sludge from the concentrate chamber. Thereby accumulation of sludge in the separating chamber is limited so that the possibility of infecting the purified liquid with sludge is reduced. |
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DETAILED DESCRIPTION What is claimed is: 1.
In a centrifuge suitable for purification of a liquid comprising a specifically heavier concentrate fraction and a specifically lighter liquid fraction, comprising a drum for the centrifuging which is rotably mounted, an inlet to the drum for introduction of the liquid to be centrifuged, an outlet for removal of specifically lighter liquid fraction and a separating chamber adjacent the periphery of the drum defined in part by the inner surface of the drum outer wall for formation and collection of the specifically heavier concentrate fraction, the improvement which comprises: a concentrate chamber in the drum disposed radially outwardly of the separating chamber and about the drum axis, and which is smaller than the separating chamber, a plurality of passageways communicating the concentrate chamber with the exterior of the drum for discharge of concentrate from the drum, means defining a narrow annular gap communicating the separating chamber with the concentrate chamber, the annular gap being shorter in height than the height of the concentrate chamber, so that accumulation of concentrate in the separating chamber is limited, said gap having an inlet defined by inner surface of the drum outer wall, the gap inlet being positioned at the locus of greatest separating chamber diameter, said inner surface of the drum outer wall being inclined for flow of concentrate from the separating chamber to said gap.
2.
Centrifuge of claim 1, the concentrate chamber being annular.
3.
Centrifuge of claim 1, wherein said passageways are disposed at spaced intervals about the drum, the concentrate chamber between the passageways being contoured for flow of concentrate to the discharge passageways.
4.
Centrifuge of claim 1, said passageways having outlets disposed radially inwardly of the periphery of the concentrate chamber.
5.
Centrifuge of claim 1, said passageways having outlets disposed at or outwardly of the periphery of the concentrate chamber.
6.
Centrifuge of claim 1, comprising a hydraulic piston for opening and closing said passageways
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