Abstract: The invention relates to a centrifuge provided with a blood bag system having an upper and lower outlet for separation of blood constituents, containing a rotor which can be driven in a rotative manner about a hub, wherein at least one conventional whole blood bag equipped with an upper outlet and with a lower outlet can be positioned vertically in this blood bag, while the whole blood bag can be arranged on the rotor in such a way that one outlet of the whole blood bag is bent in a radial direction, and the opposite outlet of the whole blood bag is bent in the other radial direction, so that the entire whole blood bag and the outlets thereof adopt an approximately Z- or S-shaped form in its functional position. In this case it is preferred that the upper outlet of the whole blood bag lie radially toward the interior and the lower outlet of the whole blood bag lie radially toward the exterior of the whole blood bag.

Abstract: A blood separation system is fully mechanized to collect blood from a patient, separate waste portions of the blood, wash the blood, and redirect the usable portions to a device for reinjecting the usable portions into the patient. The system provides screen displays with detailed setup instructions and instructs the operator at the appropriate times to do certain manual steps. Apparatus for sequestration of platelet rich plasma spins at a high speed sufficient to separate solid cells from the blood sample and then spins at a lower speed for a predetermined time to allow platelets to elute from the solid cells.

Abstract: Blood separation systems and methods introduce blood into an annular separation channel between a low-G wall and a high-G wall while rotating the separation channel about an axis, for separation of the blood into blood components. The annular separation channel has an annular boundary wall. The systems and methods direct a first blood component into a constricted channel along the low-G wall. The systems and methods remove the first blood component through a first path that communicates with the separation channel through an opening that adjoins the constricted channel adjacent the low-G wall. The systems and methods direct a second blood component along a surface that extends generally in an axial direction along the high-G wall toward the annular boundary wall. The systems and methods collect the second blood component through a second path that communicates with the separation channel through an opening that adjoins the surface adjacent the high-G wall axially spaced from the annular boundary wall.

Abstract: A skimmer device (100) for discharging liquid from a centrifuge drum (10) comprising a vertically arranged skimmer disk pipe (20) and a skimmer disk (30) which is arranged inside the centrifuge drum and provided with at least one inlet duct. The inlet duct extends from the periphery (31) of the skimmer disk (30) and leads into at least one shaft duct (22 which extends at least partially along the skimmer disk pipe. The inlet duct (32) and the shaft duct (22) form a discharge duct which has at least one throttle point where the cross-sectional area of the discharge reduced. The inlet duct (32) is divided by at least one duct division element (33.1, 33.2) into at least two partial inlet ducts (32.1 . . . 32.3) which are arranged on top of each other and which lead into the shaft duct (22). Each partial inlet duct (32.1 . . . 32.3) is provided with at least one partial inlet duct throttle element (34.1 . . . 34.3) at said throttle point.

Abstract: A centrifuge is provided for recovering material of interest from the interstitial fluids of plant tissues. The centrifuge includes a rotatable centrifuge bowl having a radially outer wall inclined outwardly so that during centrifugation liquid in the bowl climbs the outer wall. The centrifuge bowl is contained in a vacuum sealed housing so that a material of interest contained in the bowl including said liquid can be subjected to a vacuum. A system for automated cleaning of the centrifuge is also provided.

Abstract: Prior continuous discharge centrifugal concentrators for separating higher density particles from a slurry have used pinch valves to control the flow of discharge. Such pinch valves tend to be blocked by coarse particles, requiring shutdown of the machine. The present invention provides a muscle-type valve to provide a circular orifice for the valve bore of continuously variable perimeter.

Abstract: A centrifuge with controlled discharge of dense materials disclosed. A centrifuge includes a fluid separation wall placed within a sleeve to form a containment zone therebetween. The fluid separation wall aligns and rotates parallel to an axis of rotation. A receptacle forming a part of the fluid separation wall includes a void area. An opening extending through the fluid separation wall from the void area to the outer surface of the receptacle transports the more dense material to the containment zone. A valve ring forming a part of the fluid separation wall includes a valve orifice. The valve ring aligned perpendicular to the axis of rotation and slides along the fluid separation wall to move between open and closed positions. The valve orifice aligns with the opening such that the more dense material exits the fluid separation wall and moves into the containment zone.

Abstract: A separator for separating particles entrained in a fluid is disclosed. The separator includes a sleeve adapted to be mounted over a rotatable shaft for forming a cavity therebetween, an inlet to the cavity, an outlet to the cavity and means for imparting a centrifugal force on fluid within the cavity. The means for imparting the centrifugal force is operatively connected to the shaft so that, in use, spinning of the shaft creates the centrifugal force. In use, a slurry of fluid and particles enters the cavity through the inlet, the particles are caused to separate from the fluid by action of the centrifugal force, and the separated particles and fluid leave the cavity via the outlet with the particles tending to be closer to the sleeve than the shaft.

Abstract: A centrifuge with specific wall and opening shapes for receptacles is disclosed. A centrifuge may include a fluid separation wall aligned substantially parallel to an axis of rotation and include an inner surface, a void area, and an outer surface. The inner surface may be placed in contact with the fluid medium. The inner surface may include at least one receptacle. The receptacle may aid in separation of the more dense particles from the fluid medium. The centrifuge may further include at least one fluid flow path extending through the separation wall from the inner surface to the outer surface. The fluid flow path may transport the more dense particles to the containment zone.

Abstract: A solid bowl centrifuge with liquid release during rotation includes a frame, solid bowl, drive device, scraper assembly, slurry spray, and liquid collection trough. The solid bowl includes a centrifuge chamber, and a liquid evacuation chamber. A plurality of openings are formed on the outer wall of the liquid evacuation chamber. The solid bowl is pivotal retained in the frame. The liquid collection trough is disposed around the liquid evacuation chamber. The drive device causes the solid bowl to rotate. Slurry is sprayed on to the wall of the centrifuge chamber while in rotation and eventually scraped-off the wall of the centrifuge chamber. A second embodiment of the solid bowl centrifuge with liquid release during rotation utilizes at least three bearing wheels to support an outer perimeter of the solid bowl at a bottom thereof. The liquid evacuation chamber is replaced with a liquid ring attached to a bottom of the centrifuge chamber and a liquid collection trough disposed around the liquid ring.

Abstract: A system for separating biological fluids into components, comprises a set of containers for the biological fluid to be separated and the separated components, optionally an additional container for additive solution, and a hollow centrifugal processing chamber having an axial inlet/outlet for the biological fluid. The processing chamber contains a piston movable to intake a selected quantity of biological fluid and express processed biological fluid components via the outlet. Optical means monitor the position of piston to control the amount of intaken fluid and the expression of components. A distribution valve arrangement selectively communicates the processing chamber and the containers or places them out of communication. The system is arranged to operate in a seperation mode and in a non-separation transfer mode, especially for adding preservative solution to separated blood stem cells.

Abstract: In a rotating machine, at least one liquid phase discharge port assembly is provided on the bowl. The bowl is rotatable about an axis to generate a cylindrical pool of a feed slurry. The discharge port assembly includes at least one fluid guide member mounted at least indirectly to the bowl to define a liquid phase discharge path having no bends or turns, with a circumferential component oriented in opposition to a direction of rotation of the bowl.

Abstract: A rotating machine has a rotatable bowl generating a cylindrical slurry pool and at least one liquid phase discharge port assembly provided on the bowl. Each of one or more liquid phase discharge port assemblies on a bowl head define a liquid phase discharge path having a circumferential component oriented in opposition to a direction of rotation of the bowl. Each discharge port assembly includes a tubular member having at least one or two elbow pipe sections.

Abstract: In order to separate solid-liquid mixtures in a solid bowl centrifuge containing a simply designed, adjustable weir for draining the liquid which makes it possible to control or adjust the level of the liquid in the centrifuge basket (10) during the operation of the centrifuge with the least possible expenditure of energy, the invention proposes to realize the adjustable weir in the form of a stationary, i.e., non-rotating, annular cup (20) that is connected to the centrifuge housing (18) and covers the liquid drain openings (13) of the basket (10) from the outside at a certain distance, wherein the annular cup contains at least one through-opening on its circumference, the size of which can be varied, and where the liquid drains into the liquid collection chamber (15) of the centrifuge housing through the aforementioned through-opening.

Abstract: The centrifugal separator (10) has a scraper (60) for peeling and separating the solid content (94) which is accumulated in the vicinity of the peripheral wall (28) of the container (16) in association with the rotation of the container (16). This scraper (60) is provided with a guide portion (62) which changes the flow of a liquid whirling in the annular space (32) in association with the rotation of the container (16) and allows the liquid to flow obliquely and downwardly onto the solid content (94).

Abstract: A centrifugal processing bag, system and method for separating the components of a mixed material is presented. The processing bag includes a hub and a first port for receiving the mixed material, where the first port includes an outlet positioned within the processing bag at a perimeter of the bag. The processing bag also including a second port having a second port inlet spaced proximate the hub and away from a central axis of the hub. The second port directs a separated material collected from the second port inlet out of the processing bag.

Abstract: A centrifuge is provided for recovering material of interest from the interstitial fluids of plant tissues. The centrifuge includes a rotatable centrifuge bowl having a radially outer wall inclined outwardly so that during centrifugation liquid in the bowl climbs the outer wall. The centrifuge bowl is contained in a vacuum sealed housing so that a material of interest contained in the bowl including said liquid can be subjected to a vacuum. A system for automated cleaning of the centrifuge is also provided.

Abstract: A system compact enough to be located entirely beside the donor's chair, and able to process the blood while the donor is still resting in the chair after having donated the blood. The separated blood components (plasma and red blood cells) may be stored in their individual optimum environments immediately after the whole blood is drawn, and the blood does not need to be transported back to a separation laboratory for processing. The system includes a needle (72) (or other cannula-like device) for insertion into a vein of the donor and drawing whole blood therethrough, a rotor (2a) for holding the blood after it is drawn, and a motor (50) for spinning the rotor so as to cause the blood to separate into components, for example, plasma and red blood cells.

Abstract: A system for collecting red blood cells (RBCs) and other blood components that reduces the need for human intervention. A disposable set is provided having a port, an RBC container, a centrifuge rotor having a variable total volume, and a filter, along with tubing connecting the port, the container, the rotor and the filter. A control unit is also provided and includes a spinner in which the rotor may be held, a flow-control arrangement for controlling flow among the various components of the disposable set, and an electronic controller. The whole blood is directed by the flow-control arrangement from the port through the tubing to the rotor. The rotor includes an elastic diaphragm, and the control unit's flow-control arrangement includes a pump or other device for applying a positive and negative pressure to the rotor's elastic diaphragm. The spinner rotates the rotor so as to separate the whole blood into plasma and RBCs.

Abstract: A belt-driven blood centrifuge with side-mounted drive motor for rotating the centrifuge at a rotation speed selected to separate blood components. The centrifuge includes a drive shaft assembly rotated at an input rotation speed and a rotor assembly rotatably linked to the drive shaft assembly rotated at an output rotation speed twice the input rotational speed. A drive motor is provided with a drive pulley to drive a belt, a chain, and the like to provide the motive force to rotate the drive shaft at the input rotation speed. In one embodiment, a belt is provided to contact both the pulley of the drive motor and an outer surface of a rotatable shell of the drive shaft assembly. A base is included in the centrifuge upon which the drive shaft assembly is mounted. The drive motor is positioned adjacent the drive shaft assembly and mounted on the base.

Abstract: A centrifuge, comprising: a centrifuge basket for separating a fed substance to be centrifuged into different constituents; a receptacle surrounding a portion of the basket; a bag insertable into the receptacle, the bag having an exterior wall and an interior for catching at least a portion of the constituents delivered by the centrifuge basket; a space surrounding the bag; and wherein the interior of the bag near an axis of rotation of the centrifuge basket is connected by a hose with the space surrounding the bag. A method of operating the centrifuge including the steps of mounting the receptacle, feeding the substance to be centrifuged, rotating the centrifuge basket and catching solids in the bag while separating the solids and liquid.

Abstract: A horizontal solid-bowl centrifuges 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: The invention is a method and apparatus for adjusting a liquid content of a liquid and solid mixture withdrawn from a self-discharging centrifugal drum of a separator. The method includes the steps of: feeding a solid and liquid mixture into the separator; rotating the drum; separating the liquid and solid mixture during the rotation; bringing the separator to a halt; aspirating the liquid remaining in the interior of the centrifugal drum until a quantity remains which corresponds to a required consistency of a solid; and emptying the centrifugal drum of the solid with the required consistency from the centrifugal drum at a suitable rotational speed. The apparatus is a separator including: a self-discharging centrifugal drum; withdrawal openings; a solid space and a separating space; a feeding tube; a shutoff element; and a piston-type slide valve. A connection piece for the connection of a suction device is arranged below the shut-off element.

Abstract: Liquid—liquid extraction apparatus includes a separator tank rotatable about an axis extending through the tank, a tank inlet for a mixture of two liquids of different densities and which are substantially insoluble in each other, a tank outlet on the axis of rotation for the light liquid, and a tank outlet spaced from the axis of rotation for the heavy liquid. In terms of method, a mixture of the two liquids is rotated about an axis extending through the mixture to cause the light liquid to concentrate at the axis of rotation, and to cause the heavy liquid to concentrate at the periphery of the rotating liquid. The light liquid is removed from the body of liquid along a flow path co-linear with the axis, and the heavy liquid is removed from the periphery of the rotating body of liquid.

Abstract: A centrifugal extractor for extraction of an organic phase from a liquid mixture, such as liquid radioactive wastes, is disclosed. In the centrifugal extractor, both the separating weir and the divert disk are designed to be adjustable in their vertical positions. The extractor, thus, desirably separates the organic phase, including usable elements in addition to chemically toxic high radioactive elements, from the aqueous phase and desirably controls the reaction time of the two phases regardless of a variation of the mixing ratio and the rotational speed of the two phases. In the centrifugal extractor, a liquid suction and rotation unit sucks and rotates the liquid mixture and separates the organic phase from the aqueous phase while controlling the reaction time of the two phases. A height-adjustable separation weir unit is designed to locate the separating weir at a boundary layer between the two separated phases.

Abstract: A method for segregating and transporting heavy particles thrown by centrifugal force from a flowing, spinning column of liquid or gas, whereby an outer cylinder whose inner walls present or face the center core with horizontal, circular bands of pyramidal or conical shaped voids, which bands can be vertically stacked to surround a device of any length, and the voids of which present to the heavy particles being thrown from the fluid a receiving surface consisting entirely of outward sloping surfaces, all of which sloped-surface voids accept, accumulate and gravitationally guide said heavy particles towards exit orifices or nozzles, which nozzles penetrate the outer cylinder and together with the sloped voids, permit the continuous, non-mechanically assisted accumulation and ejection of said heavy particles along the entirety of a centrifugal device of any length and thus for any desired duration (or residence time) of fluid flow.

Abstract: The centrifuge continuously separates free flowing substances that have different densities. The centrifuge includes a rotor 14 having a cylindrical drum 16 and a conical drum 18. The rotor wall includes discharge ports 48, 48′, 48″ for a heavy phase and weirs 38 for a light phase arranged on a front end wall 36 of the cylindrical drum. The rotatable scroll conveyor 22 includes a hollow shaft 26 and a helix 24 for transporting the heavy phase toward the discharge ports. A feed pipe 28 is coaxially within the hollow shaft and opens into a chamber 32 within the hollow shaft. A plurality of nozzles each within a respective discharge port in the conical drum and a non-restrictive discharge port 60 in the end section of the conical drum discharge the heavy phase from the centrifuge. The nozzles are preferably arranged in a plurality of circumferential rings.

Abstract: Apparatus for the centrifugal separation and the extraction of at least one liquid component (1) and a solid component (2) from a compound product (P), comprising means (200,300,400) for recovery of part of the energy from the extracted liquid component (1).

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: The invention relates to a device and process for centrifugal separation of solid particles from a liquid. The device comprises a vessel rotatable around a vertical axis. The vessel has a separation zone with separation surface elements. The separation surface elements are formed by a plurality of adjacent, axially oriented tubular elements or channels open at both ends. The process is characterized in that the liquid is caused to flow with essentially laminar flow through a plurality of axially oriented, parallel channels and is subjected to a g-number, preferably less than 100, in order to centrifugally deposit the particles on the channel walls.

Abstract: A centrifuge has a hub and a first bowl section extending about the hub. The first bowl section has a given diameter at a downstream end of a heavy phase transport path along the first bowl section. The centrifuge further comprises a second bowl section having an input end at the downstream end of the first bowl section. The input end of the second bowl section has a diameter which is greater than the diameter of the first bowl section at the downstream end thereof. The input end of the second bowl section is disposed radially outwardly of the first bowl section at the downstream end thereof. A feed accelerator is disposed at the downstream end of the first bowl section, and more particularly between the downstream end of the first bowl section and the input end of the section bowl section, for tangentially accelerating a thickened feed or cake between the downstream end of the first conical bowl section and the input end of the second bowl section.

Abstract: A machine for separation two liquids of different densities from a mixture has a separation chamber with radially disposed fins that rotates about a central axis. The separation chamber has an outside wall with a first weir extending toward the central axis and spaced from the central axis a distance or radius that is less than the distance of the boundary between the two fluids in the separation chamber. The mixture separates into a first volume of the first fluid and a second volume of the second fluid. The first fluid exits past the first weir. The second fluid passes into a channel or volume and then past a second weir. The channel or volume is sized so that the angular momentum of the second fluid is conserved and develops a force to retain the first fluid and the second fluid in the separation chamber. The separation chamber is in a housing which contains a first collecting chamber to collect the first fluid and a second collecting chamber to collect the second fluid.

Abstract: Apparatus for separating a biological component from a biological fluid are disclosed. The apparatus includes a chamber for receiving a biological fluid including a biological component, and a rotor for creating a centrifugal field within the chamber. A source of particles may be included wherein the particles have a binding site for selectively binding to the biological component. The particles may be aseptically introduced into the chamber. The apparatus may withdraw whole blood from a donor, separate the whole blood to obtain a target cell population and return a selected one of either the target cell population or at least a portion of the whole blood remainder to the donor or patient. A disposable separation inset for use in conjunction with a rotatable separation device such as the apparatus described above may also be provided.

Abstract: Disclosed is a modified centrifugal contactor for separating solutions of near equal density. The modified contactor has a pressure differential establishing means that allows the application of a pressure differential across fluid in the rotor of the contactor. The pressure differential is such that it causes the boundary between solutions of near-equal density to shift, thereby facilitating separation of the phases. Also disclosed is a method of separating solutions of near-equal density.

Abstract: A centrifuge bowl for separating heavier particles from lighter particles and water comprises a first conical bowl wall leading to a pair of annular recesses at actually spaced positions. Each recess is generally re-shaped with an upper side wall, a lower side wall and a base. The base contains a plurality of angularly spaced discharge ducts each having a mouth projecting through the base into the interior of the bowl for collecting the heavier particles. A pinch valve is formed as an integral assembly with the mouth and duct and is mounted within a housing carried within the wall of the bowl. The housing, valve and duct can therefore be removed as a separate assembly by pulling from a chamber within the wall of the bowl. A compression fluid supply duct passes through the wall to communicate with the chamber.

Abstract: A decanter centrifuge comprises a bowl rotatable about a longitudinal axis, the bowl being provided with a cake discharge opening at one end and a liquid phase discharge opening. The bowl has a cylindrical portion and a beach portion disposed between the cylindrical portion and the cake discharge opening. A beach area is provided on an inner surface of the bowl at the beach portion of the bowl, the beach area including a first section and a second section with the second section located between the first section and the cake discharge opening. The second section of the beach area has a less steep or smaller slope than the first section. A conveyor is at least partially disposed 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 the inner surface of the bowl towards the cake discharge opening.

Abstract: A one-pass centrifuge separator for mixtures of two liquids which may also contain gas. The centrifuge uses separation zones on a rotor's inner wall to improve separation efficiency and minimize turbulent mixing. The zones consist of surface and interface vanes, and baffle plates to control flow at the fluid interface. The zones also retain an open concept to facilitate washing by cleaning fluids which are provided by nozzles installed on a stationary feedpipe mounted along the rotational axis of the centrifuge. A fluid accelerator gradually accelerates the fluid from the feedpipe to the inner wall of the rotor.

Abstract: A centrifugal separator for separating two components of a dry mixture has an annular surface inclined upwardly outwards and having a vertical axis of symmetry and a drive mechanism for rotating the surface around the vertical axis of symmetry. A centrally located feed mechanism feeds the mixture onto the surface. At least a first part of the surface is configured such that particles of one component are retained on the surface while particles of the other component progress upwards across the surface and over the upper edge. The separation process may be based on ridges or barriers which prevent upward movement of small particles, or on frictional differentials between types or shapes of particles. Multiple concentric surfaces may be used to separate mixtures in multiple components.

Abstract: A device and a process for centrifugal separation of solid particles from a liquid is disclosed. The device comprises a vessel rotatable around a vertical axis. The vessel has a separation zone with separation surface elements. The separation surface elements are formed by a plurality of adjacent, axially oriented tubular elements or channels open at both ends. The process is characterized in that the liquid is caused to flow with essentially laminar flow through a plurality of axially oriented, parallel channels and is subjected to a g-number, preferably less than 100, in order to centrifugally deposit the particles on the channel walls.

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 centrifuge has a centrifugal drum with a peeling chamber and a hydrohermetic chamber (locking chamber) (7). The centrifuge is so designed that solids deposited at the periphery (outer bottom 19) of the locking chamber (7) are carried away with the overflow stream of the sealing liquid or/and with the flow of the cleaning medium during CIP method of the space located between the centrifugal drum (2) and the centrifuge housing. A second locking chamber lid (1) is located between a locking disk (9) of the locking chamber (7) and a lid (17) for forming with the first lid a flow channel (20) for carrying away solids deposited on the outer bottom of the locking chamber via an overflow weir (16). The centrifuge is used in the field of separation technology, in particular when high hygienic requirements are applied, e.g. in the field of the foodstuff industry.

Abstract: A separator and a method for quickly separating an aliquot of plasma or serum from cells in a sample of blood is provided herein. The separator includes a housing which defines a separation container, an outlet aperture, a valve which selectively seals the outlet aperture, and a spinner. Initially, the spinner rotates the housing at a separation speed which causes the heavier cells to separate from the serum or plasma. Subsequently, the spinner rotates the housing at a faster, expellant speed which causes the valve to open and the cells to be expelled through the outlet aperture. After the cells have been expelled from the separation container, rotation of the housing is stopped and the serum or plasma is collected from the separation container. Since the separator provided herein does not use a separation gel, the separator is easy to clean and reusable.

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: Rotor for a centrifugal separator, which rotor (1) during operation rotates in a space (4) and inside itself forms a chamber (12) and a passage (7), which extends radially outwardly from the chamber (12) to the outside of the rotor (1).

Abstract: A solid-bowl centrifuge has a rotatable drum having an interior and a space adjacent to the interior of the drum for receiving separated off liquid conveyed from the drum. A weir disk is disposed between the interior of the drum and the chamber and is rotatable with the drum. Liquid is conveyed past an inner diameter of the weir disk to the space and that determines a level of the liquid in the interior of the drum. Two barrier disks on opposite sides of flat surfaces of the weir disk are gas-tightly joined together by a cylinder extending through the inner diameter of the weir disk. One barrier disk is immersible in the liquid in the interior of the drum and the other barrier disk is immersible in the liquid in the space. The barrier disks and cylinder define a chamber and a gas-supply channel supplies gas to the chamber to vary the pressure therein and thereby vary the level of the liquid in the interior of the drum.

Abstract: A decanter centrifuge comprises a bowl rotatable about a longitudinal axis, the bowl being provided with a cake discharge opening at one end and a liquid phase discharge opening. The bowl has a cylindrical portion and a beach portion disposed between the cylindrical portion and the cake discharge opening. A beach area is provided on an inner surface of the bowl at the beach portion of the bowl, the beach area including a first section and a second section with the second section located between the first section and the cake discharge opening. The second section of the beach area has a less steep or smaller slope than the first section. A conveyor is at least partially disposed 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 the inner surface of the bowl towards the cake discharge opening.

Abstract: A method and apparatus for centrifugal solids separation for use in the drilling industry, concerned with the conservation of drilling mud. The apparatus comprises a rotatable container, a device for inputting used mud to the container preferably with minimal turbulence, a collection device for collecting and compacting separated solids material, a device for wiping separated solids material from the sides of the container and preferably directing this material to the collection a device and an output from the container for cleaned mud. So that the apparatus may be employed for continuous mud cleaning or solids separation, the collection device may be isolated from the container to allow dumping of collected solids material. Where there are multiple collection compartments there may be a synchronised cycle of dumping of the collection device to maintain balance of the container during continuing centrifugal rotation.

Abstract: Centrifugal separator comprising a rotor, which forms an inlet and an outlet chamber (17) surrounding the rotational axis, in which a liquid present therein rotates around the rotational axis with a radially inwardly directed free cylindrical liquid surface. A stationary discharge device (21) extends in the outlet chamber (17) from the rotating liquid body radially inwardly to a central outlet (25) and forms a flow channel (26) with an inlet opening (23).

Abstract: A centrifugal filter device includes a housing having an essentially cylindrical housing wall about an axis of the housing and an annular trough located radially inwardly of the housing wall, a cap fitted to the housing and having a lid spaced from an upper edge of the housing wall, the cap further comprising an annular side wall spaced radially outwardly from the housing wall and defining an annular catchment chamber having an annular tapered deflection surface therein, a first exit port in the side wall of the cap, a second exit port at the trough of the housing, an inner chamber situated within the housing and adapted to rotate about the axis, the inner chamber having an essentially cylindrical wall inwardly spaced from the cylindrical wall of the housing so as to define an annular space therebetween, an internal drain communicating an interior of the chamber with the trough of the housing, and an annular closure element having an opening communicating the interior of the chamber with the annular catchment

Abstract: A centrifuge of the type having a rotary basket with a bottom wall, side wall and a top wall with a central opening therein includes a liquid feed pipe extending into the basket through the top opening to a point spaced above the basket bottom wall at the rotary axis thereof for conducting a feed liquid into the basket. A feed accelerator projects from the basket bottom wall opposite the feed pipe. The accelerator rotates with the basket so that, the accelerator will impart radial and angular acceleration to the liquid issuing from the feed pipe so that that liquid is redirected and accelerated toward the basket side wall. The centrifuge also incorporates a liquid drain in the basket bottom wall adjacent to the rotary axis of the basket for draining liquid from the basket when the rotation of the basket is stopped.