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: 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 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 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 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 screw-type solid bowl centrifuge for centrifuging material which has a tendency to foam. The centrifuge includes a centrifugal drum having discharge ports and a rotatable bowl jacket with a screw that rotates relative to the bowl jacket. Also included is a feed section having a central pipe arranged concentrically about the rotation axis of a drum for feeding the material to be centrifuged through a distributor into a centrifuge chamber between the screw and the bowl jacket. The feed section is an hermitical, closed system. Further included is a baffle plate arrangement that prevents foam or certain particles from escaping from one of the discharge ports.

Abstract: The invention relates to a solid bowl screw centrifuge comprising a centrifuging chamber (19) having a rotating screw (1) and a likewise rotating drum (21) surrounding the centrifuging chamber (19), in addition to a distributor (15) which is preferably embodied as a tube and is used to introduce the material to be centrifuged (S) into the centrifuging chamber (19). Said distributor is oriented in a angular manner, especially perpendicularly, in relation to the central axis (A) of the screw (1). The material to be centrifuged is guided through an axially extending inflow tube (13) into the distributor (15). At least one wall (15a) of the distributor is provided with a surface structure consisting of projections (27) in such a way that the main part of the material to be centrifuged (S) which passes through the distributor must flow around at least one of the projections (27) on the at least one wall (15a) on the radial path from the inflow tube (13) to the centrifuging chamber (19).

Abstract: In a solid-jacket centrifuge drum for separating out a liquid phase, a weir is rotatable with the drum around an axis, is disposed in a path of the separated out liquid phase and has at least one channel for the separated out liquid phase. A choke plate regulates flow through the at least one channel in the weir and thereby the level of liquid inside the drum. The choke plate is stationary relative to the rotation of the weir and the drum and is axially displaceable relative to the weir to form a gap therebetween for the separated out liquid phase. The gap has a distance which is varied with the axial displacement of the choke plate.

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: The intake space of a centrifuge drum is divided into a vestibule with ribs and an intake chamber without ribs. The vestibule communicates with the intake chamber through an annular gap between the outside diameter of a disk secured to an intake pipe and the inside diameter of the intake space. The intake chamber communicates with a set of disks through channels. The diameter D.sub.K of the intake chamber at the level of the channels is longer than the diameter D.sub.F that must be maintained at the upper surface of the centrifugate in a skimming chamber during operation. Since the incoming centrifugate does not rotate in the intake chamber and since no rotational pressure is accordingly generated, the intake pressure in the intake pipe is transmitted when the intake chamber is full to the centrifugate in the intake chamber, until the requisite level of centrifugate in the skimming chamber is attained.

Abstract: A self-emptying centrifuge drum has an intake for the centrifugate, a peeling chamber that accommodates a peeling disk for diverting the clarified liquid, and an automatic device that senses the level of solids in the separating space of the drum. The sensing device consists of channels extending from the separating space to another peeling chamber with another peeling disk. The outflow channel from the second peeling disk communicates with a measuring instrument that operates in conjunction with controls that introduce the extracted solids into the drum. Peeling channels are provided in the second peeling disk, extending out from its circumference and opening tangentially into an annular space that does not have any ribs and that extends radially inside the disk to detect the level of solids in the separating space even when centrifugates that do not block the channels sufficiently are being clarified.

Abstract: In the continuous-operation centrifuge drum for concentrating suspended solids the solids are conveyed to a central chamber from a solids space through channels. Before the solids arrive in the central chamber, they must travel through an unribbed annular space. Since the solids concentrate tends to increase its existing kinetic energy, a higher flow resistance is generated. As viscosity increases, the solids, however, are more powerfully affected by friction in the unribbed annular space, their kinetic energy decreases, and the flow resistance decreases. The resulting increase in the volume of solids extracted also decreases its concentration and hence its viscosity. This behavior of the solids in the unribbed annular space of a rotating drum results in automatic regulation of the solids concentration.

Abstract: A centrifuge drum is provided with a seal consisting of a narrow gap between the drum and centrifuge housing. The seal is located between the actual housing and the solids catch chamber. There is a pressure-compensation space at the drum in the vicinity of the seal. The exchange of air that occurs at the seal in a centrifuge without the compensation space between the solids catch chamber and the housing in accordance with the invention and that leads to deposits of solids in the housing is accordingly displaced into the compensation space.

Abstract: The centrifuge has a self-emptying drum. The jacket of the drum has expulsion apertures that lead from the solids space and that can be closed off by a piston slide. With the piston slide is associated a closure chamber. The closure chamber has channels for supplying closure liquid and communicates through a let-off channel in the form of an annular gap with a chamber. The inside diameter of the chamber equals the outside diameter of the closure chamber. The chamber can accommodate all the closure liquid in the closure chamber. This makes it possible to completely empty the closure chamber, so that there is no residual closure force on the piston slide.

Abstract: Centrifugal separator drum (FIG. 1) for the clarification and separation of liquids, having one or more paring systems 12, 13 for the removal of the clarified or separated liquids, a stationary inlet tube 11 which communicates with a smooth, cylindrical inlet chamber 18, which rotates with the drum and is affixed to the latter, via an opening that is slightly larger than the inlet tube. Outlets ports 20 lead out of the inlet chamber into a forechamber 21 which communicates on the one hand with an annular chamber 24 situated ahead of the inlet chamber and on the other hand with the riser passages 23 of the plate insert 4.

Abstract: A centrifuge drum with a beveled-plate insert consists of individual plates held apart by spacing strips. The plates are mounted on a distributor foot. The bottom of the distributor foot has channels through which the liquid to be centrifuged is conducted into the separation space. There are ribs in the separation space. Between the ribs are lifting channels into which the channels in the distributor foot empty. The lifting channels are formed by the ribs and are positioned behind the spacing strips in the direction in which the drum rotates. The layout of the lifting channels prevents the liquid flowing into the plate insert from mixing with the solid particles that have been centrifuged out and are sliding out of the insert.

Abstract: A centrifuge with a drive-mechanism that incorporates a vertical spindle mounted on ball or roller bearings and driven by a belt in such a way as to rotate while aligning itself in space around a point of attachment on its longitudinal axis with respect to the framework of the centrifuge and with respect to a bearing housing that is supported on the framework. The midplane of the drive belt extends through the point of attachment, with which the center of mass of the self-aligning components also coincide. The overall length of the spindle is short. The ratio L/D of the distance L between the bearings to the diameter D of the bearings ranges from approximately 0 to 2.

Abstract: A continuously operating screw ejection centrifugal separator. The drum and the screw are driven by an epicyclic gear train. Changes in torque between the screw and the drum of the centrifuge are measured and the differential speed of the screw and drum is controlled so as to obtain substantially steady state operation of the separator. For the control, a second epicyclic gear train is associated with the first-mentioned epicyclic gear train.