Abstract: The present invention relates to a centrifugal liquid separation machine and in particular to a screw type centrifugal liquid separation machine that lifts grit and other solids from the bowl wall in a radially inward manner and resuspends the grit and other solids into the heavy phase discharge flow. According to one embodiment of the present invention, the machine has an outer bowl and a conveyor. The bowl and conveyor are coaxial, and a back drive assembly causes these components to rotate at different speeds to allow the conveyor to mechanically sweep heavy phase materials within a separation region of the machine. Grit is conveyed radially inward along a plow and tumbled into the heavy phase discharge flow, wherein it is resuspended and exits the machine with that flow. Wipers can also be provided for preventing blockage of heavy phase flow under the solids baffle.

Abstract: A wear tile includes a support member and a wear plate formed of material known as Cerbide. A plurality of the tiles may be secured to any structure that is subject to wear, such as the rotating vane section of a centrifugal separator.

Abstract: A clean-in-place decanter centrifuge for processing a combined liquid and solid material to separate the solid material from the liquid. The centrifuge is designed for use in the food processing industry, particularly for dairy products, and therefore has fluid injectors for cleaning all surfaces within the centrifuge including the opposed mating surfaces which function as non-contacting seal mechanisms. The centrifuge has no metal-to-metal contact areas within the interior of the bowl and scroll assembly. In one embodiment, the outer wall of the bowl and scroll assembly comprises a plurality of drain lines located in the rear wall section of the bowl to allow essentially all liquid to drain from the bowl and scroll assembly. In another embodiment, the bowl hub comprises at least one drain line to allow lubrication oil to drain into said cavity and prevent ingress of lubrication oil into said bowl and scroll assembly.

Abstract: A system for treating tar sand involving a centrifuge where under centrifugal force solvent treated tar sand and water form a three layer system of wet sand, water, and petroleum, where solvent solubilized hydrocarbons are stripped from the wet sand layer, passed through the water, and into the petroleum layer. The hydrocarbons are skimmed from the hydrocarbon layer and recovered.

Abstract: A helical conveyor centrifuge, such as a solid-bowl or sieve-bowl centrifuge, includes a rotatable drum, a rotatable screw disposed within the drum, and a centrifuge drive for rotating the drum and the screw. The centrifuge drive is configured to set a differential speed between drum and screw. The centrifuge drive includes a first motor, a second motor, and a gearing arrangement disposed between the motors and also between the drum and the screw. The gearing arrangement includes a gearing arranged downstream of the motors and has a first gear, a second gear and a third gear stage. The first and second gear stages include at least four shafts. Torques are either introduced into or are taken off from the first and second gear stages. The first and second gear stages are disposed in a housing and driven by at least three of the at least four shafts.

Abstract: A centrifuge for separating solid-liquid mixtures including: a rotating bowl having a head wall with at least one drain opening for clarified liquid, said bowl having a rotational axis; a weir plate fixed to the head wall of the bowl and rotating with bowl, wherein the weir plate is aligned with the at least one drain opening; a choke plate coupled to and rotating with the rotating bowl, the choke plate having surface axially aligned with the drain opening or the weir plate, wherein said choke plate is movable axially with respect to the head wall, and a gap having between the drain opening or the weir plate, wherein the gap has a radially inward inlet receiving the clarified liquid from the bowl and a radially outward outlet for discharging the clarified liquid from the bowl.

Abstract: A screw centrifuge for the continuous separation of flowable substances of different densities includes a rotor drum having discharge openings for the heavy phase that are arranged in a conical portion of the rotor wall, and weir openings for the light phase that are provided on an end wall of the rotor drum. A conveyor screw is rotatable inside the rotor drum and has a screw blade mounted on a hollow shaft for transporting the heavy phase to the discharge openings. A mixture inflow tube is arranged coaxially inside the hollow shaft and leads to a feed chamber in the hollow shaft that is in flow communication with the screw blade. An air extraction member is provided before the feed chamber and generates, in the annular space enclosing the inflow tube, a suction flow co-directional with the delivery direction in the inflow tube.

Abstract: A solid-bowl centrifuge comprising, a centrifugal drum rotatable about a horizontal axis of rotation, the centrifugal drum including a weir to drain a liquid out of the centrifugal drum, the weir including a passage having at least one passage opening in an axial end region of the centrifugal drum that includes a drum lid: a deflector plate arranged outside the centrifugal drum and in front of the drum lid, the deflector plate being stationary during an operation of the centrifugal drum and widening at least in sections as the deflector plate extends away from the centrifugal drum: and the deflector plate including an interior jacket, and a distance of the interior jacket from the horizontal axis of rotation not being constant but widening.

Abstract: A method for purifying a fluid from contaminating particles in a centrifugal separator by means of a separation aid which is of higher density than the fluid and which binds said particles, the centrifugal separator having a rotor body that rotates about an axis of rotation. The fluid to be purified is led via an inlet into a separation chamber delimited by the rotor body. Separated particles are discharged via a first outlet and clarified fluid cleared is discharged via a second outlet. The fluid being mixed with an amount of separation aid, supplied to the separation chamber. The pollutant particles are bound to the separation aid, which is forced out by the rotation of the rotor body to the periphery thereof. A small flow of separation aid and particles bound thereto are discharged from the separation chamber via the first outlet, and a flow of purified fluid is discharged from the separation chamber via the second outlet.

Abstract: A decanter type centrifugal separator includes a torque transmission mechanism with enhanced effect of absorbing a torsional vibration. The decanter type centrifugal separator (10) includes a bowl (20); a screw conveyor (40) disposed in the bowl (20); a processed liquid feed portion (15); a separated liquid discharge port (81); a solid discharge port (82); a drive portion (71); and a differential gear unit (50) for generating a difference in speeds between the bowl (20) and the screw conveyor (40). A torque transmission mechanism (60, 61) includes an elastic damping member (67) for absorbing the torsional vibration of the screw conveyor (40).

Abstract: A solid-bowl screw centrifuge includes a rotatable drum having a horizontal axis of rotation, which drum surrounds a centrifuging space. Further included is a screw which is arranged within the drum, the screw being rotatable at a different speed relative to the drum. Further included is at least one liquid discharge sealed from its surroundings and at least one solid discharge in a tapering region of the drum. Also included is an immersion disk on the screw which disk lies between a liquid feed and the solid discharge and divides the centrifuging space into a discharge space between the immersion disk and the solid discharge, and a separation space between the immersion disk and the liquid discharge. The centrifuge includes a device for charging the separation space with a gas. A process for operating for the solid-bowl centrifuge is also disclosed.

Abstract: A centrifuge (2) includes a conveyor (12) including a hub (14) rotatable about an axis (34) and at least one helical blade (16) extending radially from the hub and in the axial direction of the hub. A bowl (4) extends about the conveyor and is rotatable about the axis. The bowl includes a cylindrical section (6) extending from an upstream end of the conveyor and a conically diverging screen section (10) extending to a downstream end of the conveyor. The bowl may also include a conically converging section (8). The conically diverging screen section includes an angle (40) that reduces the coefficient of friction of the solids to a point that allows the cake formed of the solids to slide in a controlled manner forward on the conically diverging screen section with minimal back pressure but without allowing the solid cake to break loose from the conically diverging screen section and slide out of the centrifuge in an uncontrolled manner.

Abstract: A decanter type centrifugal separator includes a torque transmission mechanism with enhanced effect of absorbing a torsional vibration. The decanter type centrifugal separator (10) includes a bowl (20) having a cylindrical part (21), a conical part (22), a separated liquid discharge dam part (25), and a dewatered solid discharge port (26); a screw conveyor (40) disposed in the bowl (20) for axially conveying sedimentation solid, and arranged to be coaxial with the bowl (20) to be rotatable at a speed different from that of the bowl (20); a processed liquid feed means (15); a separated liquid discharge port (81); a solid discharge port (82); a drive means (71); and a differential gear unit (50) for generating a difference in speeds between the bowl (20) and the screw conveyor (40).

Abstract: A drive device for screw centrifuges has a rotating drum driven by a drum driving motor, and a screw mounted coaxially in the drum and having a screw shaft. A screw drive motor for rotating the screw has a housing rotatably fixed to the drum and an electric torque motor rotatably fixed to the screw shaft and disconnected from the drum driving motor.

Abstract: A system for controlling viscosity of drilling fluid, the system, in certain aspects, including a container of the material, a viscosity sensor in the container for producing viscosity signals, a centrifuge for removing solids from the material, drive apparatuses for driving a rotatable bowl and a rotatable conveyor of the centrifuge, pump apparatus for pumping material, drive apparatus for the pump apparatus, and a control system for controlling the centrifuge and the pump apparatus in response to viscosity signals so that selected solids from material processed by the centrifuge are removed to control viscosity of drilling fluid material in the container; and in certain aspects, a similar system for controlling density of a drilling fluid material.

Abstract: A system for controlling a centrifuge processing drilling fluid, the system, in certain aspects, including a container of the material, a sensor in the container for producing signals indicative of a fluid density parameter, a centrifuge for removing solids from the material, drive apparatuses for driving a rotatable bowl and a rotatable conveyor of the centrifuge, pump apparatus for pumping material, drive apparatus for the pump apparatus, and a control system for receiving the signals and controlling the centrifuge in response to the density parameter of the drilling fluid.

Abstract: A two-tube centrifuge separates light material and heavy material from an input mixture. A hollow drive shaft rotates a central body member about an axis of rotation. Two hollow arm assemblies, each having circular cross-section, are mounted on diametrically opposite sides of the central body. Each arm assembly includes an outer housing tube, an intermediate tube, and an inner tube that is longer than the intermediate tube. An end cap having a removable plug is mounted on the outer end of the housing-tube of each arm assembly. The inner ends of all three tubes are mechanically interlocked in a manner to cantilever mount the inner and intermediate tubes to the central-body with their outer ends spaced from the internal surface of the end cap. An input-mixture path extends through the hollow drive shaft, through the central-body, and into a cylindrical space between the inner and intermediate tubes of each arm assembly.

Abstract: The filter removes volatile, particulate and water-based contaminants from a fluid, such as lubricating oil, of a different density than the contaminants. The device has a cone shaped, jet-propelled, helical-spiral wiper rotor creating centrifugal forces that separate the volatile and heavier particulate matter. Ports in a base assembly facilitate removal of the separated contaminants. A settling tank with vertical grid filter minimizes turbulence for further separation of heavier particulate matter. A volatile tank with vertical grid filter and flow restrictor minimizes turbulence to allow volatiles to rise from the fluid. A filter tank filters out remaining particulate matter from the fluid. A combination of flow restrictors and baffles minimize cross-contamination, thereby maximizing purity of oil returned to the engine. The collection tanks are easily cleaned and reused. The compact design minimizes oil volume necessary for purification.

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 screw-type solid-bowl centrifuge including a rotatable drum having a tapering portion and a cylindrical portion. The rotatable screw includes a screw body, at least one main screw blade surrounding the screw body and forming a plurality of screw flights. The plurality of screw flights forms a conveying path configured to transport a material to be processed in the centrifuge. Two blade segments are arranged in the conveying path in portions of the plurality of screw flights. The at least one main screw blade is provided in a region of the blade segments that includes clearances configured to allow a throughflow of the material to be processed to flow between adjacent screw flights.

Abstract: A device for dewatering bulk or free-flowing input material by compacting it is provided. The device has a housing arranged along an axis of rotation, which has an input area and a feed and compaction area following axially within a jacket pipe. In the housing, a coaxial drive shaft with circumferentially extending coils rotates, compacting the input material during transport from the input area through the feed and compaction area. In this process the residual water present in the input material is conducted through radial openings in the jacket pipe from the device. According to the invention it is provided that at least in a partial region the jacket pipe is provided with passages and inside the jacket pipe an inner pipe is arranged, which lies at least partially with its external circumference against the inner circumference of the outer jacket pipe and which at least in the area of the passages has passage openings that are several fold smaller than the passages in the jacket pipe.

Abstract: A solid or screen bowl decanting-type centrifuge comprising: a rotatable bowl; a helical scroll conveyor which rotates coaxially within the bowl at a different rotational speed, the helical scroll comprising a hub carrying a plurality of flights whose radially outer edges lie close to an inner wall of the bowl such that, in use, solids are scrolled by the conveyer to solids discharge ports at one end of the bowl, with separated liquid being discharged from liquids discharge ports at the opposite end of the bowl. The conveyor hub carries a plurality of nozzles in a wash zone for supplying wash fluid to solids being scrolled by the conveyer towards the solids discharge ports. The conveyor hub also carries a blade in the region of the nozzles and intermediate adjacent flights of the conveyor for directing fluid droplets from the nozzles over said solids.

Abstract: A full-jacket helical conveyor centrifuge including a rotatably disposed drum and a drive device for the drum. The drive device for the drum includes at least one electromechanical direct drive having secondary elements arranged on the outer periphery of the drum or on the outer periphery of a part non-rotatably connected with the drum. Primary elements are arranged radially outside the secondary elements at a distance from the secondary elements and without contact. A propulsion force is generated by an electromagnetic field of travelling waves.

Abstract: Disclosed is a centrifuge including a rotationally mounted drum and a worm mounted therein in a concentric manner to rotate at a different speed therefrom. The drum and the worm are driven by a stationary motor unit. A hydraulic motor, provided with a housing and a rotor and fed by means of a hydraulic pump, is mounted therebetween. Such a centrifuge has the hydraulic feed pump assigned to the hydraulic motor to rotate along with the hydraulic motor while the rotor thereof is supported outside the rotating centrifuge parts to not rotate together with the rotating centrifuge parts. Additionally, the quantity of liquid delivered to the hydraulic motor by the feed pump is modified via displacement members actuated in a hydraulic fashion and disposed on the drive unit to rotate therewith.

Abstract: A method and apparatus for centrifuging.

Abstract: A system for treating tar sand involving a centrifuge where under centrifugal force solvent treated tar sand and water form a three layer system of wet sand, water, and petroleum, where solvent solubilized hydrocarbons are stripped from the wet sand layer, passed through the water, and into the petroleum layer. The hydrocarbons are skimmed from the hydrocarbon layer and recovered.

Abstract: A method of separating drilling/production fluids from solid cuttings from a mixture received from down hole, without the use of shale shakers, de-sanders, or de-sanders, through the steps of flowing the mixture from the well bore into a flow line above the surface of a well; next, flowing the mixture into a single separation zone of a size capable of receiving the mixture directly from the flow line on a continuous basis; circulating or centrifuging the mixture to a desired RPM within the separation zone; providing a liquid permeable barrier surrounding the mixture as the mixture is centrifuged within the separation zone; collecting the liquid in a first retrieval zone after the liquid has penetrated permeable barrier; and collecting the solids that could not penetrate the permeable barrier in a second retrieval zone within the barrier.

Abstract: A conical housing of a horizontal decanter centrifuge includes a discharge port liner that attaches to the conical housing from the outside of the housing. The discharge port is substantially rectangular in configuration, and the liner slides down into the port opening. The liner is coupled to the housing with bolts or similar releasable coupling apparatus.

Abstract: A full-jacket helix-type centrifuge including a drum and at least one weir having a port. A throttle disk is assigned to the port. At least one nozzle rotates with the drum and is assigned to an outlet for discharging clarified liquid from the drum.

Abstract: A method and apparatus for separating particles preferentially accelerates particles to a rotating collector, which then reliably conveys collected particles to a discharge with minimal re-entrainment of the particles in the fluid stream. The collector minimizes energy transfer to the fluid and maximizes separation under conditions of high particle loading, fine particle content, or both. The separator may be operated in any vertical, horizontal or oblique orientation, or within devices whose orientation varies over time.

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 centrifuge of the type having an outer bowl and an inner rotor both of which are generally cylindrical and rotate in the same direction but at slightly different rates separates slurry fed into the interior of the rotor into solids and liquid. An auger flight on the outside surface of the rotor carries the solids along the annular channel between the outside of the rotor and the inside of the bowl. The slurry is fed into a chamber at one end of the rotor and through outlet holes in the sides of the rotor into the channel. An end plate of the chamber has a forwardly projecting domed central nose which extends into the flowing slurry. Transverse guide plates of the rotor act to engage the slurry and accelerate it into rotation with the rotor before escaping through the holes. The guide plates are shaped with curved angularly projecting ribs on the downstream side in front of the hole over which the slurry flows in a smooth path before exiting the hole.

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 decanter centrifuge has a hollow, rotatable drum with a screw conveyor comprising a core body (1), in which an inlet opening for material into the drum from an inlet chamber (3) is provided, the inlet opening having a delimitation surface (7) which is rear relative to the direction of rotation and extending substantially axially, said delimitation surface being provided with a wear reinforcement member (8). The wear reinforcement member extends along the rear delimitation surface (7) into the inlet chamber (3). The wear reinforcement member (8) is provided with abutment surfaces (11; 19) in abutment against abutment surfaces associated with the core body, which during operation prevents the wear reinforcement member (8) from moving tangentially forwards in the in the direction of rotation and radially out of the core body (1). At least one of said abutment surfaces associated with the core body (1) is constituted by a removable blocking member (17).

Abstract: A screw conveyor intended and formed for use in a decanter centrifuge for separation of solid particles from a fluid compound, comprising a central body, at least one conveyor thread and at least one baffle bridging a flow path formed between different parts of the conveyor thread. The screw conveyor has at least two originally separate parts, each of which comprises a portion of said conveyor thread and which are kept together axially. The baffle constitutes a separate member arranged to be kept in place between said parts of the screw conveyor, when these parts are kept together axially, and has a portion which forms a part of the conveyor thread in an area where the conveyor thread intersects with and extends past the baffle.

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 separating a multi-phase mixture (50) into a liquid phase (54) and a dry phase (52) with a specified dry matter concentration. A decanting centrifuge (100) with an annular immersion disk (14) and a weir arranged at an end face of a centrifuge drum (20) are used. After start-up of the centrifuge drum (20), the multi-phase mixture (50) is introduced into the centrifuge drum (20). The dry phase (52) and the liquid phase (54) are drawn off. The liquid level in the centrifuge drum (20), is controlled by the weir and compared to a tolerance range until the specified dry matter concentration is reached. The weir is positioned so reaction to concentration changes in the multi-phase mixture (50) is possible in both directions. The speed of the centrifuge drum (20) is lowered incrementally and the weir position adjusted, so the dry phase concentration remains constant.

Abstract: The present invention is a solid-bowl screw centrifuge that includes a centrifugal drum. The drum has a drum casing and a screw with a screw body that is surrounded by a screw blade. The screw blade forms at least one screw spiral with a conveying path for transporting material to be centrifuged. The centrifuge also includes an inlet into the centrifugal drum, at least one solid matter discharge and at least one liquid outlet. The centrifuge includes a drum chamber that is axially closed by a drum cover having essentially a conical shape. Further included is a disk stack having at least one conical disk, and the disk stack is mounted to the drum cover directly upstream of the liquid outlet. At least a portion of the disk stack is arranged in a cylindrical section of the drum chamber that has an essentially constant diameter. A screw disk is arranged on the screw body between the drum cover and a first screw spiral.

Abstract: The filter removes volatile, particulate and water-based contaminants from a fluid, such as lubricating oil, of a different density than the contaminants. The device has a cone shaped, jet-propelled, helical-spiral wiper rotor creating centrifugal forces that separate the volatile and heavier particulate matter. Ports in a base assembly facilitate removal of the separated contaminants. A settling tank with vertical grid filter minimizes turbulence for further separation of heavier particulate matter. A volatile tank with vertical grid filter and flow restrictor minimizes turbulence to allow volatiles to rise from the fluid. A filter tank filters out remaining particulate matter from the fluid. A combination of flow restrictors and baffles minimize cross-contamination, thereby maximizing purity of oil returned to the engine. The collection tanks are easily cleaned and reused. The compact design minimizes oil volume necessary for purification.

Abstract: The present invention relates to solid bowl screw centrifuge comprising a centrifuging chamber having a rotatable screw with a center axis and a rotatable drum surrounding the centrifuging chamber. Also included is an axially extending inflow tube for guiding material to be centrifuged into a distributor. The distributor is oriented in a substantially perpendicular manner with respect to the center axis of the screw and configured for introducing the material to be centrifuged into the centrifuging chamber. The distributor further includes at least one wall having a surface structure that includes projections configured such that a substantial portion of the material to be centrifuged flowing through the distributor must flow around at least one of the projections.

Abstract: A solid bowl screw centrifuge includes a centrifuging chamber and a rotatable drum having a horizontal axis of rotation. The rotatable drum surrounds the centrifuging chamber. Also included is a rotatable screw arranged in the rotatable drum, at least one solids discharge, at least one liquid discharge duct and a peeling disk via which liquids are discharged through the liquid discharge duct. Further included is a blocking chamber connected to an output side of the peeling disk.

Abstract: The rotatable machine (1) of the invention comprises a chamber (2) and a shaft (3), wherein the shaft (3) is mounted in the chamber (2) such that, upon rotation of the shaft (3) and the chamber (2), the shaft (3) and the chamber (2) each rotate about the same axis (4), and a first motor (20) for driving the chamber (2) and a second motor (30) for driving the shaft (3), each motor (20, 30) having an axis, wherein the axes of the first and second motors (20, 30) and the axis (4) of rotation of the chamber (2) and of the shaft (3) are coincident.

Abstract: A centrifuge for separating feed material into component parts, in one aspect primarily solid and primarily liquid parts, the centrifuge, in certain aspects, including a conveyor rotatably mounted in a rotatable housing, the conveyor having an interior and at least one impeller, the rotatable housing having a separating region with a pool area and a beach area with feed material passable through the interior of the conveyor, the feed material directed radially by the impeller(s) and spread by the impeller(s), in certain aspects along the conveyor or part thereof, onto part of the pool area, and/or in certain aspects onto the beach area.

Abstract: A method of retrofitting a centrifuge is provided. The method includes disassembling a known centrifuge and replacing a bowl section of the centrifuge outer body with a longer bowl section. The method further comprises replacing the conical beach section with a shorter beach section, i.e. a beach section having a greater slope. The screw conveyor is replaced with another screw conveyor having outlet nozzles adapted to impart rotational movement to the inlet feed. The retrofitted centrifuge provides enhanced performance through an additional length of cylindrical section, thereby making the clarification length longer, and improving the effectiveness of the centrifuge in removing solids from the inlet feed. The retrofitted centrifuge preferably remains mounted to the same pedestal as the centrifuge prior to retrofit.

Abstract: A solid bowl helical conveyor centrifuge. The centrifuge includes a rotating drum, having a centrifuge space with a screw that can also rotate. An inlet tube for supplying a material for centrifugation into the centrifuge space, and at least one liquid discharge and at least one solids discharge, wherein the liquid discharge and/or the solid discharge is/are designed as at least one or more openings in a rotating part of the solid bowl helical conveyor centrifuge, in particular through openings in the drum wall. At least one of the openings is covered by a housing which encloses the drum of the solid bowl helical conveyor centrifuge in only some sections, between the at least one housing and the drum and/or other rotating elements of the solid bowl helical conveyor centrifuge (drum heads, hubs) at least one or more gaskets are provided.

Abstract: A control system for a centrifuge that allows the centrifuge to continue to run when there is a short duration failure or outage of the AC power source. The control system allows the centrifuge to be brought to a stop in a normal shutdown mode where there are longer duration failures or outages of the AC power source. This allows power to be maintained to the pump that lubricates the centrifuge bearings so that the bearings are lubricated during the coast down of the centrifuge and the differential speed of the centrifuge to be controlled during coast down allowing the centrifuge bowl to be cleared of solids so that the centrifuge can be immediately started up at lower vibration levels once power is restored.

Abstract: A method and apparatus for centrifuging.

Abstract: A method and apparatus for centrifuging.

Abstract: A system for separating a multi phase mixture into a first liquid phase component, a second liquid phase component and a solid phase component includes a three phase centrifuge and a control system for the centrifuge. The control system includes a fuzzy soft sensor programmed with fuzzy logic rules and a feed forward controller in signal communication with the fuzzy soft sensor. The feed forward controller is configured to adjust a feed rate and a feed temperature of the mixture based on the rules, the cold feed temperature, the percent change of water in the mixture, and the percent change of solids in the mixture. The system also includes a feedback controller configured to adjust the feed rate and the feed temperature of the mixture based on the rules, and the basic water and solid (BS&W) content of the first liquid phase component.

Abstract: A control system for a centrifuge that allows the centrifuge to continue to run when there is a short duration failure or outage of the AC power source. The control system allows the centrifuge to be brought to a stop in a normal shutdown mode where there are longer duration failures or outages of the AC power source. This allows power to be maintained to the pump that lubricates the centrifuge bearings so that the bearings are lubricated during the coast down of the centrifuge and the differential speed of the centrifuge to be controlled during coast down allowing the centrifuge bowl to be cleared of solids so that the centrifuge can be immediately started up at lower vibration levels once power is restored.