Abstract: Device for foaming a liquid comprising a mixing unit (30). The mixing unit (30) comprises a first element (31) having an inner surface (33), a second element (34) having an outer surface (35), a gap (36) between the inner surface (33) of the first element (31) and the outer surface (35) of the second element (34), a first opening (37) and a second opening (38) connected through the gap (36). At least one of the first element (31) or the second element (34) is rotatable about an axis of rotation (AR) with respect to the other one. The inner surface (33) and the outer surface (35) are symmetric with respect to a common axis of symmetry (AH, AW), coincident with the axis of rotation (AR), and have circular sections, perpendicularly to the axis of symmetry, having diameters which increase going in a direction along the axis of symmetry (AH, AW).

Abstract: A continuously operating centrifuge for centrifuging sugar massecuites has an upwardly flaring conical sieve basket (20) which rotates about a vertical axis (16). A product distributor (40) flares downwardly and extends into the bottom region of the sieve basket (20). The product distributor (40) is substantially coaxial with respect to the sieve basket (20), has a discharge rim and rotates about the same vertical axis (16) as the sieve basket (20). Within and in the upper region of the product distributor (40), there is provided a distributor pot (30) which serves as a feeding device for the sugar massecuites in the axial region of the centrifuge. The peripheral wall of the product distributor (40) is divided up into a plurality of ring elements (41, 42, 43) which overlap in the direction of the axis (16) and the internal diameters of which differ from each other. A bell (50) surrounds the product distributor (40) and flares conically downwardly.

Abstract: The invention is a decanter centrifuge for separating a first substance and a second substance with different densities, comprising a bowl rotating in use around a horizontal axis of rotation in a direction of rotation, said axis of rotation extending in a longitudinal direction of said bowl, a radial direction extending perpendicular to the longitudinal direction, a base plate provided at one longitudinal end of said bowl, said base plate having an internal side and an external side, an outlet opening provided in said base plate for discharge of one of said substances. A slide valve body is adapted for covering an adjustable part of the outlet opening to delimit an effective area of the outlet opening.

Abstract: A centrifugal separator includes a rotating body rotating in use around an axis. The rotating body comprises a bowl, which comprises a base at one longitudinal end of said bowl, said base defining a rear longitudinal area. An outlet passage extends through the base and an outlet housing is provided in the rear longitudinal area. The outlet housing is communicating with the outlet passage to receive liquid therefrom and the outlet housing has an outlet opening discharging in use liquid from the rotating body. The outlet opening comprises a weir edge defining in normal use a level of a surface of a liquid in the bowl. The outlet housing is rotatable around an adjustment axis and the outlet opening is placed in a side wall offset from the adjustment axis.

Abstract: A horizontal solid-bowl centrifuge with cleaning-in-place jet nozzles for cleaning the bowl in a manner complying with good manufacturing procedure is provided. The bowl is cleaned by a defined arrangement of the cleaning jet nozzles, as the bowl rotates at a speed insufficient to produce a centrifugal force equal to gravitational acceleration, where gravitational acceleration is equal to 1.0 g. The cleaning liquids are then removed after the bowl stops rotating at the lowest point of the bowl.

Abstract: A separator having a conical separator drum mounted rotatably at only one of its axial ends and having a vertical axis of rotation. The drum includes a rotary spindle for driving the separator drum. The separator includes an inflow pipe for a product to be processed and at least two liquid outlets. The first liquid outlet is for a lighter phase and the second liquid outlet is for a heavier phase. The first liquid outlet includes a stripping disk. Further included is a solids discharge port and a separation plate stack in the separator drum. The second liquid outlet is followed outside the drum by a settable throttle device having an annular disk for displacing a liquid radius of the heavier phase by a throttling in an outflow cross section for the heavier phase.

Abstract: The invention provides an apparatus for separating a multiphase mixture into discrete density phases, comprising a circular bowl rotatable about a central axis and having an opening through which the mixture is introduced into the bowl, whereby the rotation of the bowl separates the mixture to form annular columns of the discrete density phases; a delivery conduit inserted into the bowl through the opening for introducing the mixture into the bowl; and a collection assembly for removing the separated discrete density phases, comprising a collection conduit for collecting the annular columns, a waste collecting conduit, and a cleaning conduit. The collection assembly is movable as a single unit with respect to the bowl such that it can be positioned within the bowl to sequentially, selectively and individually remove the annular columns from the bowl while the bowl is rotating substantially without disturbing the remaining annular columns within the bowl.

Abstract: A solid bowl screw centrifuge including: a drum having a solids discharge at a conical end and at least one discharge opening at an end opposite the conical end, the at least one discharge opening arranged with an axial drum lid; a screw rotatable at a different speed relative to the drum; a centripetal chamber section connected behind the drum lid with the at least one discharge opening; a centripetal pump arranged to discharge a liquid phase from the solid bowl screw centrifuge; and an adjustable throttling device connected in front of the centripetal pump in the centripetal chamber section, the adjustable throttling device being assigned to the at least one discharge opening.

Abstract: A centrifugal separator of the type having migration, retention and lip zones of the interior surface of the rotating bowl has a variable diameter lip to increase the amount of target material retained in the retention zone.

Abstract: A solid bowl helical conveyor centrifuge, including a rotatable drum having a horizontally-oriented axis of rotation and a rotatable screw arranged in the rotatable drum. Also included is at least one discharge opening oriented at an angle with respect to the horizontally-oriented axis of rotation. The at least one discharge opening is configured to discharge solids from the rotatable drum. An adjusting device is assigned to the at least one discharge opening and by which adjusting device an outlet cross-section of the at least one discharge opening is changeable. The adjusting device includes a movable adjusting disk arranged in the rotatable drum as an extension of the rotatable screw, and which movable adjusting disk is non-rotatably connected with one or more of the following: a) the rotatable drum, b) the rotatable screw, and c) a screw body. At least one connecting rod is fastened to the movable adjusting disk.

Abstract: A three-phase decanting centrifuge is provided. Solids are removed from a slurry in the centrifuge in the conventional manner, as described above. The liquid separated from the slurry moves into a fluids reservoir. Centrifugal action classifies the fluids, with lighter fluids (typically oil) radially closer to the axis of rotation of the machine, while the heavier fluids are radially farther from the axis, i.e. at the bottom of the reservoir. Lighter fluids flow out a plurality of overflow tubes. Heavier fluids flow through a plurality of ports into a heavy fluids reservoir to be skimmed out by a pair of radially actuatable skimmer tubes. The skimmer tubes are preferably automatically operated based on the light transmissivity of the lighter and heavier fluids discharged from the machine.

Abstract: A screw centrifuge for the wet-mechanical separation of a mixture of solids in a carrier liquid to produce sinks and floats, including a rotor which rotates about a horizontal axis, the rotor having a cylindrical wall and two conical walls, and a conveyor screw which is mounted for rotation coaxially inside the rotor, the conveyor screw including a shaft and a pair of helical blades which are pitched in opposite directions. At least one feed opening is provided in the shaft for feeding a mixture of solids radially into a space between the shaft and the rotor, and discharge openings for respective sinks and floats are provided in the rotor at respective ends of respective conical drums. A baffle device extends radially inward from the rotor for producing a first liquid level for the sinks and a second liquid level for the floats.

Abstract: A method for adjusting an interface formed during operation between a specific light liquid phase and a specific heavier liquid phase to a wanted radial level in a centrifugal separator, in which the separation chamber is emptied of its contents and the inlet opening is brought to a radial inner position in the outlet chamber, after which a pre-determined volume of the specific heavier liquid phase is supplied to the separation chamber and the mixture of the two liquid phases is supplied to the separation chamber via the supply conduit and the inlet chamber whereby the separation chamber is filled up and an interface between the two liquid phases is formed, which is displaced radial outwardly, the displaced specific heavier liquid phase then being pressed radial inwardly in the outlet channel and further into the outlet chamber.

Abstract: The invention relates to a centrifuge comprising the following: a centrifugal drum, and at least one, preferably two, stripping disc(s) for conducting liquid out of the centrifugal drum. The at least one stripping disc comprises at least one conducting channel which opens into a conducting chamber, whereby at least one restriction point is preferably provided between the conducting channel and the conducting chamber allocated thereto. A rotatable flow restrictor is assigned to said restriction point and, according to the respective position of rotation thereof, opens a more or less large cross-section of the at least one restriction point.

Abstract: A process for regulating a centrifuge used for solid/liquid separation of sewage sludge commences by measuring the input variables of the operating point ot the centrifuge, the variables including 1) suspended matter content of the centrate; 2) the flow rate of sludge; 3) the flow rate of reagent; and 4) the value of torque of the motor of a conventional centrifuge. Operating zones are established, each of which is two dimensional relative to the input variables. Fuzzy logic rules are established, qualifying the operation of the centrifuge, the rules respectively corresponding to the zones. The rules are implemented in response to the input variable measurements, where actions on the sludge flow rate and reagent flow rate make it possible to bring the operating point into a particular zone of optimal and stable centrifuge operation.

Abstract: Centrifugation separations apparatus including centrifugation means having an inlet, a liquids discharge and a solids discharge, a deflector operatively associated with the solids discharge, wherein the solids discharge is adapted to operatively discharge solids being discharged from the centrifugation means at a trajectory and the deflector is adapted to interrupt the trajectory to decelerate and change the direction of travel of the solids, or wherein the deflector is operatively associated with the solids discharge and cooperable with solids being discharged from the solids discharge whereby buildup of solids on the deflector is substantially prevented, or wherein the solids discharge includes a lip configuration which causes the trajectories of the discharging crystals to be relatively independent of their size and/or their residual syrup/moisture content, or including support means, such as a spider like construction having one or more webs substantially parallel to the angular motion of the solids being

Abstract: A centrifuge includes a conveyor for moving cake along a cake flow path towards a cake discharge opening and further includes a baffle mounted to the conveyor and disposed along the cake flow path. The baffle is provided on an upstream side, facing substantially away from the discharge opening, with a concave profile or surface. This concave profile or surface serves to direct a portion of the cake, which is headed downstream along the cake flow path, into a recirculation or churning path directed partly back towards a pool. The recirculation or churning of the particulate material facilitates an enhanced washing thereof and improves the removal of valuable solutes or undesirable impurities from the cake.

Abstract: A rotor for collecting and centrifuging biological fluids in a range of volumes. The rotor includes an elastic impermeable diaphragm which defines at least a portion of a variable-volume processing chamber, where the fluid is centrifuged. The rotor includes a rigid mounting member, to which the diaphragm is mounted and which is held and spun by a chuck. Preferably, this rigid mounting member includes a boundary wall which together with the elastic diaphragm defines the chamber. The boundary wall may be a substantially imperforate circular wall which extends to the periphery of the processing chamber but defining one opening, preferably near the axis of rotation, permitting a conduit or conduits to pass therethrough so as to be in fluid communication with the processing chamber. The rotor may include a separate structure for controlling the flow of liquid out of the chamber into the conduit.

Abstract: A rotor for collecting and centrifuging biological fluids in a range of volumes. The rotor includes an elastic impermeable diaphragm which defines at least a portion of a variable-volume processing chamber, where the fluid is centrifuged. The rotor includes a rigid mounting member, to which the diaphragm is mounted and which is held and spun by a chuck. Preferably, this rigid mounting member includes a boundary wall which together with the elastic diaphragm defines the chamber. The boundary wall may be a substantially imperforate circular wall which extends to the periphery of the processing chamber but defining one opening, preferably near the axis of rotation, permitting a conduit or conduits to pass therethrough so as to be in fluid communication with the processing chamber. The rotor may include a separate structure for controlling the flow of liquid out of the chamber into the conduit.

Abstract: A centrifuge includes a conveyor for moving cake along a cake flow path towards a cake discharge opening and further includes a baffle mounted to the conveyor and disposed along the cake flow path. The baffle is provided on an upstream side, facing substantially away from the discharge opening, with a concave profile or surface. This concave profile or surface serves to direct a portion of the cake, which is headed downstream along the cake flow path, into a recirculation or churning path directed partly back towards a pool. The recirculation or churning of the particulate material facilitates an enhanced washing thereof and improves the removal of valuable solutes or undesirable impurities from the cake.

Abstract: The apparatus for the continuous separation of liquid and relatively fine particles from a liquid slurry includes one or more centrifuge vessels disposed about a longitudinal axis of rotation, and a driver for rotating the centrifuge vessel or vessels. A feed inlet introduces the liquid slurry into each centrifuge vessel, each of which extends at an oblique angle to the axis. A first outlet is provided adjacent to the inner end for the lighter liquid component, and a second outlet is provided adjacent to the outer end for the heavier solid particle component. The inlet of the each centrifuge vessel is preferably located between the first end and the second end, and the second outlet preferably comprises a plurality of solids removal capillary passages connected to a continuous solids removal tube, which can be connected to a source of vacuum to form a vacuum chamber for withdrawing the solids. A supernatant liquid collection chamber is also connected to the first outlet for receiving the supernatant liquid.

Abstract: A method and apparatus for separating solids from a liquid in a slurry using a centrifuge employing two simultaneous rates of rotation is disclosed. In the preferred form, the device includes an external bowl having at one end a hub with a central trough therein, plural passages from said trough through said hub extending radially outwardly to contact newly delivered slurry against the wall of the bowl, the wall comprising an elongate right cylinder construction terminating at a flange. A second portion of the bowl is tapered on the exterior and defines a rising beach portion on the interior. Inside, an elongate screw conveyor is deployed and is driven by the input velocity of an external motor rotating said bowl and said conveyor. The shaft connects to the conveyor through a differential motor which provides a scrolling speed of up to about 10 rpm. At the remote end, the conveyor tapers to cooperate with the beach portion of the bowl to scroll dry solids onto the beach and through an outlet.

Abstract: An outlet device for discharging liquid from a chamber (16) in a centrifugal rotor, that is rotatable around a rotational axis (12), comprises an outlet member (29). This outlet member is turnable around a turning axis (26) in parallel with said rotational axis (12) and is held by a spring (31) pressed radially outwardly in the chamber (16) against and partly into a liquid body rotating with the centrifugal rotor. The outlet member (29), which further forms an outlet channel (34) and an inlet opening (30) communicating therewith, is shaped such that the inlet opening (30) is situated downstream of said turning axis (26) during operation of the centrifugal rotor.

Abstract: A system for separating a fluid having heavier and lighter components. The system includes a rotor having a rigid mounting member and an elastic diaphragm attached to the mounting member, the diaphragm defining a chamber. The system also includes a chuck for holding the rigid mounting member of the rotor and for spinning the rotor around an axis. The pressure of a control fluid, preferably a control gas, disposed adjacent the rotor's diaphragm is varied in order to control the volume of the rotor. Pressurizing the control gas causes fluid to flow out of the rotor; applying a vacuum to the diaphragm draws fluid into the rotor.

Abstract: A decanter centrifuge comprises a bowl having a plurality of cake discharge openings at one end and a liquid phase discharge opening. The bowl is rotatable about a longitudinal axis, while the cake discharge openings are disposed in a plane oriented transversely relative to the longitudinal axis. The bowl has a cylindrical portion and a beach portion between the cylindrical portion and the cake discharge openings. A conveyor is disposed at least partially inside the bowl for rotation about the longitudinal axis at an angular speed different from an angular rotational speed of the bowl. The conveyor includes a helical screw disposed inside the bowl for scrolling a deposited solids cake layer along an inner surface of the bowl towards the cake discharge openings. A feed element extends into the bowl and the conveyor for delivering a feed slurry into a pool inside the bowl.

Abstract: An externally adjustable liquid interface for a centrifugal separator. A tubular liquid outlet extends into a rotatably mounted drum. The tubular liquid outlet has an exterior surface, an interior bore, and a top lip which represents an interface for liquids of differing densities. The tubular liquid outlet includes a first tubular member and a second tubular member. A first end of the second tubular member telescopically mates with a first end of the first tubular member. A second end of the second tubular member serves as the top lip of the tubular liquid outlet. A threaded coupling is provided between the first tubular member and the second tubular member. Upon rotation of the second tubular member the relative telescopic position of the second tubular member and the first tubular member is altered. A fitting disposed in the interior bore of the tubular liquid outlet is non-rotatably coupled with the second tubular member. The fitting is adapted to receive a working end of a tool.

Abstract: Centrifugal separator comprising a rotor, which forms an inlet for the liquid which is to be centrifugally treated and an outlet chamber (17) for a liquid separated in the rotor, the outlet chamber (17) surrounding the rotational axis and being so designed that liquid present in the outlet chamber during operation rotates around the rotational axis and has a radially inward facing circular free liquid surface at a certain radial level in the rotor. A stationary discharge device ( 21 ) extends in the outlet chamber (17) from the liquid body radially inward to a central outlet (25) and in the area of the free liquid surface it forms an inlet opening (23), which is directed toward the rotational direction of the liquid body and partly is located in the liquid body, the discharge device also forming a flow channel (28), which connects the inlet opening (23) to the central outlet.

Abstract: The device comprises a closed chamber (1) equipped with an inlet pipe (3) for the aerated liquid, an outlet pipe (4) for the deaerated liquid, and an air evacuation pipe (5); and a rotor having a shaft extending into the chamber. The shaft carries means (7) for centrifugation of the liquid and means (8,9,10) for intensive agitation of the centrifuged liquid.The device works according to the following process: continuously, the liquid is introduced into the closed chamber and it is vigorously centrifuged there in with the aid of mechanical means (7) and simultaneously subjected to intensive agitation with the aid of second mechanical means (8,9,10).The released air gathers freely at the center of the chamber whence it is evacuated, as the deaereated liquid is evacuated through the outlet pipe.

Abstract: A solid-bowl centrifuge with an intake pipe and a peeling disk that conveys the peeled-off material out through its hub and comprises a stationary eccentric and a rotating lid that allows the disk to rotate on a carrier positioned in a radial slot. The hub comprises two concentric components, wherein the inner component is secured to the stationary eccentric and the outer component is secured to the rotating peeling-disk lid.

Abstract: A continuous-operation centrifuge drum for concentrating suspended solids. The concentrated solids are diverted out of an outer solids space through channels into an inner chamber, whence the concentrated solids are continuously extracted. At least one vortical-outflow space is positioned between the channels and the inner chamber, with the points of which the medium enters the channels distributed around the outer demarcation of the outflow space and with the outlet from the outflow space extending from a radially outward region in the outflow space to the inner chamber. A separate vortical-outflow space is associated with each channel. Each outflow space consists of two demarcating surfaces, preferably extending in planes perpendicular to the axis of rotation of the drum, and of a surrounding wall that connects them, and extends radially to a multiple of its axial length.

Abstract: A scraper for a sugar centrifuge comprises a scraper blade mounted on an arm which is moved down into and pivoted within the centrifugal bowl, such that the edge of the scraper blade is moved against but out of contact with the bowl wall for scraping off the sugar adhering to the bowl wall. After the scraping edge, the scraper blade has an afterscraper in direct or indirect contact with the bowl wall. The afterscraper comprises in one embodiment a block whose boundary plane facing the scraping edge forms an acute angle with the tangential plane along the line of contact of the block with the bowl wall.

Abstract: A centrifuge for separation of two liquid phases of different specific gravities to be removed separately; the separation chamber has a first subset of openings communicating with a skimmer and a second subset of openings communication with a collector. In one position, a movable barrier plate covers the inner portion of the first subset and the outer portion of the second subset to direct the heavier liquid to the skimmer and the lighter liquid to the collector. Changing the barrier to a second position where the situation is reversed selectively directs the lighter liquid to the skimmer.

Abstract: In a centrifuge rotor provided with sludge channels (25) for conveying sludge radially inwards to a sludge receiving chamber (15), from which the sludge is discharged by means of a central sludge discharge means, the openings of the sludge channels (25) into the sludge receiving chamber (15) are controlled by a slide member (14) being actuated to move in one axial direction by spring means (28). To cause the slide member (14) to move in the other axial direction, a pressure chamber (18), sealed against the sludge receiving chamber (15), is arranged between the slide member (14) and the rotor, and a fluid channel (33) extends through the rotor to the pressure chamber (18), connecting the pressure chamber with a pressure source (35) located outside the rotor. A position regulator (32) is situated in a cavity of the rotor, and is arranged to operate directly on said slide member (14) for regulation of its position.

Abstract: An apparatus for separating solid matters having a rotor of a double-basket construction consisting of a centrifugal filtering basket which is secured in a basket which effects the separation relying upon the difference in specific gravity. A pipe is so arranged as to supply the liquid to be treated into the centrifugal filtering basket, and scoop pipes are arrayed near the side surfaces of the two baskets.

Abstract: A centrifugal separator having a rotary bowl for receiving feed which forms a pool within the bowl a skimmer movably mounted to fixed structure within the bowl for removing liquid from the pool to a discharge system with an outlet external to the bowl, and adjustment means operable from outside the bowl for adjustably moving the skimmer oppositely toward and away from the bowl axis to vary the pool depth. However, in accordance with the invention, the skimmer adjustment means includes skimmer mounting means movably connecting the skimmer to the fixed structure within the bowl so as to enable adjustment movements thereof by the adjustment means and so that the hydraulic thrust of the pool liquid against the skimmer is applied by the mounting means substantially entirely to the fixed structure. Preferably, the adjustment movement of the skimmer enabled by the mounting means are essentially radial only to the axis of the bowl, thus greatly reducing the amount of adjustment movement required.

Abstract: A continuously operable sugar centrifuge modified as taught herein is capable of producing quality sugar. For this purpose elastic, spring resilient sheet metal members (11) are attached to a rotatable ring with an adjustable angle of incidence so that the surface of these flexible sheet metal members encloses a selectable incidence angle with the flight path (12) of the sugar crystals, whereby the speed with which the sugar crystals impinge on the flexible sheet metal members may be controlled. Such control may be accomplished, for example, by a closed loop deceleration or braking action of the rotatable ring carrying the metal members.