A separation disc for a centrifugal separator is adapted to be included in a stack of separation discs inside a centrifugal rotor for separating a fluid mixture. The separation disc has a truncated conical shape with an inner surface and an outer surface and a plurality of spacing members extending from at least one of the inner surface and the outer surface. The spot-formed spacing members are for providing interspaces between mutually adjacent separation discs in a stack of separation discs. The separation disc further includes at least one elongated rib extending from the inner surface to a height (h) that is less than the height (H) to which the plurality of spacing members extend. Further, at least one elongated rib extends from first position on the inner surface to a second position on the inner surface. The second position is at a radial distance that is larger than the radial distance of the first position, and the relation between the height of the elongated ribs (h) and the spacing members (H) are h/H>0.7.

A separator includes a preassembled drive and rotation system unit having an outer ring flange portion and a drive frame having an inner ring flange. The outer ring flange portion of the preassembled drive and rotation system unit is vertically connected to the inner ring flange of the drive frame. A rotatable drum is placed onto the preassembled drive and rotation system unit, in the drum at least one paring disk is arranged in a paring chamber, and one or more stacks each having one or more stackable intermediate elements are arranged between the inner ring flange and the outer ring flange portion in order to set an axial relative position at least between the drive frame and the drive and rotation system unit.

A method for processing a flowable product using a centrifuge includes pretreating the flowable product so that particles in the flowable product are increasingly attracted by electrically charged components, feeding the flowable product into the disc stack, generating an electric charge on the discs of the disc stack, and separating the charged particles from the flowable product within the disc stack under the influence of electrostatic attractive forces and a centrifugal field.

A method for processing a flowable product using a centrifuge includes pretreating the flowable product so that particles in the flowable product are increasingly attracted by electrically charged components, feeding the flowable product into the disc stack, generating an electric charge on the discs of the disc stack, and separating the charged particles from the flowable product within the disc stack under the influence of electrostatic attractive forces and a centrifugal field.

A separator having a vertical rotation axis includes a rotatably mounted drum having a drum interior for centrifugal processing of a liquid. The separator also includes a gas supply line for introducing gas into the liquid, which opens into the drum interior.

A separator having a vertical rotation axis includes a rotatably mounted drum having a drum interior for centrifugal processing of a liquid. The separator also includes a gas supply line for introducing gas into the liquid, which opens into the drum interior.

An apparatus for facilitating particle separation by density includes a separator having an inner surface surrounding a rotation axis and defining a particle path from an input end to an axially spaced output end. The inner surface includes a plurality of axially spaced dividers having respective inner positions, defining at least in part respective axially spaced retainers for collecting particles during rotation of the separator. The retainers each include at least one fluid inlet for fluidizing particles in the retainer during operation. The dividers include a first pair of adjacent dividers and a second pair of adjacent dividers, the first pair nearer the input end than the second pair, wherein a first divider slope of the first pair is greater than a second divider slope of the second pair and wherein each of the first and second divider slopes is zero or positive. Other systems, apparatuses and methods are disclosed.

An apparatus for facilitating particle separation by density includes a separator having an inner surface surrounding a rotation axis and defining a particle path from an input end to an axially spaced output end. The inner surface includes a plurality of axially spaced dividers having respective inner positions, defining at least in part respective axially spaced retainers for collecting particles during rotation of the separator. The retainers each include at least one fluid inlet for fluidizing particles in the retainer during operation. The dividers include a first pair of adjacent dividers and a second pair of adjacent dividers, the first pair nearer the input end than the second pair, wherein a first divider slope of the first pair is greater than a second divider slope of the second pair and wherein each of the first and second divider slopes is zero or positive. Other systems, apparatuses and methods are disclosed.

A centrifuge includes a rotatable rotor and an assembly that is stationary during operation. The rotatable rotor is rotatably mounted in or on the stationary assembly by one or more mounting devices. The rotatable rotor has a rotatable drum and a drive element for rotating the drum as well as one or more electrical loads located on or in the rotor. The centrifuge includes at least one battery is also located on or in the rotor in order to supply the at least one load or the plurality of loads with electrical power. The load can include a data memory in the rotor or on the rotor. At least one actuator is provided as the at least one load.

To improve the measurement accuracy of a particle size distribution measuring device that performs a particle size distribution measurement in a line start mode. A measurement cell used in a line start mode of a centrifugal sedimentation type particle size distribution measuring device includes: a cell main body that has an opening provided on one end and stores therein a density gradient liquid W.sub.DGS; and a cell cap that closes the opening of the cell main body and has an internal passage R provided therein for holding a sample liquid W.sub.SS. When an application of a centrifugal force is received, the sample liquid W.sub.SS is introduced from the internal passage R into the density gradient liquid W.sub.DGS.