Abstract: An apparatus for filtering a material from a medium includes a first housing having a wall with a plurality of openings formed therein, a conveyor disposed in the housing for moving the material therealong, and a conduit line communicating with the interior of the housing for supplying the medium to the apparatus. At least one of the first housing and the conveyor rotate relative to a central axis to direct the medium toward the wall so as to separate the material from the medium. A method for filtering a material from a medium includes supplying the medium to a first housing, spinning the medium within the housing, passing the medium through a wall of the housing to separate the material from the medium, moving the material along the housing, introducing a fluid into the material within the housing, and washing the material using the fluid.

Abstract: A vibrating centrifuge having a separation screen that is rotated and vibrated to separate a material, typically slurry (e.g. coal slurry). The separation screen is vibrated by a vibrator, such as an unbalanced motor. One or more constraint members, preferably leaf springs, are provided that restrict vibration generated by the vibrator to a single degree of freedom that is parallel to the drive shaft axis. The vibrating centrifuge has a biasing member in the form of a compression spring to tune the vibration frequency. Optionally a tuning mass can also be used to tune the vibration frequency.

Abstract: A method of fractionating a dispersion of oxidic nanoparticles wherein at least one step of the method is a membrane crossflow filtration step, the flow of the dispersion over the membrane being brought about by means of driven rotating parts; and dispersions of oxidic nanoparticles that are obtainable by the method.

Abstract: Separating a multi-phase mixture influent even during excessive flows of specific phases. The dynamic phase separator includes a chamber divided into two regions by an inner wall disposed radially inward relative to an outer wall. A gross separation region is defined between the inner wall and the outer wall, while a fine separation region lies inside an area defined by the inner wall and top of the chamber. Influent to be separated is fed through an inlet into the gross separation region. A plurality of porous disks are mounted to a rotatable shaft and disposed in the fine separation region. The outer and inner walls are separated by a predetermined distance sufficient to allow for adequate rotational velocity of incoming tangential flow of the influent and dwell time sufficient for natural separation of lighter phases from heavier phases within the gross separation region.

Abstract: A filter includes a crucible, a filtering container, and a receiving tank. The crucible has a heater for heating a pre-filtered object to comprise a primary material in liquid and at least one other material in solid. The filtering container has a body, a sieve, and a press rod. The body connects with the crucible for receiving the heated pre-filtered object in a channel and provides a guide-out member; the sieve is disposed in said channel; and the press rod movably received in the channel for pressing the primary material of the pre-filtered object to flow through the sieve and to the guide-out member. The receiving tank has an entrance facing the guide-out member of the filtering container to receive the filtered primary material.

Abstract: A filtration apparatus includes a container (24) that surrounds at least one rapidly rotating membrane pack (32, FIG. 2) and stationary turbulators (36A, 36B ) slightly spaced from the membrane pack surfaces to leave thin gaps (40A, 40B ) between them, which obtains the advantages of both series-connected and parallel-connected systems. A feed conduit (82) connects the radially outer ends (110) of the gaps, to carry feed fluid into and out of each gap, with radially outward flow (94) near the pack surfaces, causing radially inward flow (102) near the surfaces of the turbulators. The turbulators have recesses that leave projections to promote fluid shear at the membrane surfaces. A motor shaft (314) supported on motor bearings, has a motor housing fixed to the container. The motor shaft extends into the container and holds the membrane pack to spin it, so only the motor bearings (316, 318) support all rotating parts.

Abstract: A drum vacuum filter is shown which draws-in and radially outwardly projects the liquid content of a slurry or the like while the latter is advanced vertically along a passageway defined between a cylindrical rotating filter and a rotating drum wall, the latter of which collects and advances the solid material content of the slurry downwardly along the passageway for delivery and, as facilitated by a scroll scraper extending therealong. The liquid content is drawn under vacuum pressure induced force by a series of spaced-apart flutes or plates disposed along the exterior of the rotating filter, and radially or transversely outwardly with respect to the filter for segregated delivery with respect to the solid material content of the slurry or changed-in liquid.

Abstract: A centrifugal separation method for living cells is disclosed in which a cell containing solution is charged in a rotor chamber confined by a steam pressure-resistant wall. A rotor having septa is disposed in the rotor chamber. The septa are rotatable in the same direction at the same angular velocity as the rotor while at least part thereof is immersed in a solution in the rotor when cells are to be centrifuged from the cell-containing solution. After the cells are separated and adhered to the inner surface of the rotor, a supernatant in the rotor is discharged form the rotor. Then a fresh cultivating medium is introduced into the rotor, and the septa and the rotor are rotated at mutually different angular velocities while at least part of the septa is immersed in the fresh medium in the rotor. As a result, the cells are again suspended in the fresh medium.

Abstract: Centrifugal oil filters are described comprising a rotatable centrifugal cleaning cartridge, a shaft for rotation thereon, a co-operating member for connecting the filter assembly to a source of fluid to be cleaned, an outer casing member, a closure member for sealing one end of the casing member and a fluid drain conduit and wherein the centrifugal cleaning cartridge may be removed without removal of the outer casing member or disconnection of the fluid drain conduit.

Abstract: Process and means for purifying cellulose ethers without flocculation points or with relatively high flocculation points (up to 95.degree. C.) and thermoplastic, i.e. highly propoxylated, products made from cellulose in any form, the crude product is first suspended and the suspension liquid subsequently separated in a reverse filter centrifuge a single-stage or multistage wash can be carried out. The filter cake is discharged by reversal of the filter cloth of the centrifuge.

Abstract: In a pusher centrifuge comprising substantially cylindrical sieve or straining drums which simultaneously rotate but also oscillate relative to one another, and a pusher bottom or base, the pusher edge of at least one sieve or straining drum is provided with inclined surfaces which impart in the transverse or circumferential direction a motive component to the centrifuging or solid material transported in the axial direction. By virtue of the thus generated shearing effect, the compacted solid material cake is torn open or disintegrated during the forward feed and the dewatering performance is improved.

Abstract: An apparatus for separating multiple phases of solids or fluids includes an exterior housing having an interior chamber. A plurality of porous filter disks is positioned within the interior chamber and have a common central passage. The disks are capable of rotating around the central passage. An inlet introduces at least one fluid phase with or without a solid phase into the interior chamber near the central passage of the disks. A centrifugal force is created within the interior chamber to form a pressure differential across the disks to draw the fluid through the disks away from the central passage, while propelling any solids present in the interior from the central passage toward the exterior housing. The fluid drawn through the disks is collected at the periphery of the disks.

Abstract: In apparatus for removing water and impurity components from sand, there are provided a rotary member having an opening at one end for charging and discharging sand and a filter for passing water. The rotary member is supported by a support and driven by a variable speed motor. Piston-cylinders or the like are provided for tilting the support. In a modified embodiment, two of the rotary bodies are juxtaposed with their openings faced each other. A peripheral wall of the rotary member is provided with a member of perforations for discharging water separated from sand.

Abstract: In the dynamic concentration of a suspension, in which the suspension is fed into a filter which has a driven stirring device, and in which the suspension forms a filter cake which is continually remixed by stirring with the suspension being dehydrated and maintained in a liquid state up to a desired degree of concentration, the power consumption of the stirring device is measured, in particular the torque is measured, and the intensity of the stirring motion is controlled in accordance with the measured torque by causing a change in the number of revolutions per minute of the stirring device in response to the torque transgressing an upper limit or a lower limit.

Abstract: A centrifuge, preferably of the type having an upright axis, e.g. a wobble centrifuge, is provided with a distributor for the product to be centrifuged. The distributor, which is rotatable with the shaft, e.g. by being connected to the drum or basket or to the drive shaft proper, is formed with a circular array of ribs which are concave in the direction of rotation and form acute angles with a circle centered on the axis of the distributor along the inner portion of the array, thereby improving the distribution of the product to the drum and accelerating the product in the direction of rotation while directing it outwardly onto the drum.

Abstract: A wobble centrifuge has a housing in which a tube shaft is rotatable about a first axis, this tube shaft having a lower tube part centered on the first axis and an upper tube part centered on a second axis that crosses the first axis at an intersection. An at least partially flexible core shaft has a lower core part rotatable in the lower tube part about the first axis and an upper core part rotatable in the upper tube part about the second axis. A downwardly flared sieve drum is carried on the upper core part and is centered generally on the second axis, this sieve drum having a wall tapered upwardly from a lower edge spaced below the intersection in a direction parallel to the second axis by a predetermined distance. A suspension to be centrifuged is introduced into the drum generally radially of the axes at a location spaced above the intersection in a direction parallel to the second axis by a spacing equal to substantially more than the spacing between the lower end of the drum and the intersection.

Abstract: A centrifuge has a drum to which a wobble or nutating motion is applied to discharge the centrifuged material over the edge of a wall of the perforated basket. The wobble or nutation is caused by tilting the axis of this wall relative to the axis rotation of the assembly. According to the invention, the basket is rotatably driven by an inner shaft and ride upon an inclined member driven by an outer shaft. The ratio n.sub.2 /n.sub.1 of the rotating speed n.sub.1 of the inner shaft and the rotating speed n.sub.2 of the outer shaft can be varied between values of -5 and +7 preferably -5 to +6 excluding values of about 0, 0.9, 1 and 2. The ratio determines the effective nutating angle.

Abstract: A method of and an apparatus for separating a fluid including a plurality of fluid components of different viscosities. The fluid is centrifugally accelerated and contacts a solid viscosity differentiating adhesion means. The degree of adhesion of the different viscosity fluid components to the solid viscosity differentiating adhesion means varies proportionally with the viscosity of the fluid component. The trajectory of each fluid component on emerging from the solid viscosity differentiating adhesion means varies in accordance with the degree of adhesion of each fluid component to that adhesion means. The fluids are physically separated by placing between the trajectories of each of the fluid components a partition which defines a receptacle for collection of each of the component fluids.