Patent ID: 11938489
Assignee: FLSMIDTH A/S
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 10:
11. A centrifuge (1) for separating intermixed particulate material of different specific gravity comprising:
a centrifuge bowl (10) having a base (11), a circumferential bowl wall (12) surrounding a central axis (15) and an open end substantially opposite of the base (11), said central axis (15) passing through the base (11), the circumferential bowl wall (12) having an inner and outer surface, said inner surface comprising a plurality of annular recesses (19);
a housing (30) for accommodating the centrifuge bowl (10), said housing (30) having a base (34) located in the central axis (15) and a circumferential housing wall (33) surrounding the central axis (15);
an inlet (17) configured to allow entry of a slurry into the centrifuge bowl (10), preferably arranged substantially in parallel with the central axis (15);
means for rotating the centrifuge bowl (10) about the central axis (15);
an upper portion of the housing wall (33) is connected to an upper portion of the bowl wall (46), and the base (11) of the centrifuge bowl is connected to the base (34) of the housing thereby defining an annular cavity (31) between the bowl wall (12) and the housing wall (33);
the annular cavity (31) being fluidly connected to the plurality of annular recesses (19) on the inner surface of the centrifuge bowl by a number of perforations in the bowl wall (12);
a fluid inlet fluidly connected to the annular cavity (31),
wherein an accumulated cross-sectional flow area (Aflow) at two different heights in the annular cavity (31) differs by at least a factor of 10, such that a first section of the annular cavity (52) is at least partially separated from a second section of the annular cavity (53).