Abstract: A solids dryer is post-connected to an invertible filter centrifuge, wherein a dehumidification and drying of the solids takes place in the invertible filter centrifuge by means of centrifugation, pressure gas compression and/or heat convection and in the solids dryer by means of heat contact and/or heat convection. The invertible filter centrifuge and the solids dryer are connected to one another to form a unit via a closure device. Sensors serve to measure the respectively prevailing degree of dehumidification and drying as well as to determine additional operating parameters. The sensors actuate a common control device which regulates the operating parameters.

Abstract: A centrifuge with a slide-in filter comprises a centrifuge basket, a filter cloth element which can be pushed into or out of it, and a machine housing, to which a first housing chamber with an outlet for discharging a filtrate and a second housing chamber with an outlet for discharging a filter cake are connected in the region of the centrifuge basket. The first housing chamber is sealingly enclosed by a first separate housing section and the second housing chamber is likewise sealingly enclosed by a second separate housing section. The two housing sections are mounted so that each is able to pivot in different directions around separate axes in such a way that they are pivotable individually between a closed state and an open state relative to the centrifuge basket.

Abstract: An invertable filter centrifuge for separating liquid-solids mixtures comprises a rotatingly driven centrifugal drum, an invertable filter cloth arranged on the centrifugal drum, a filtrate housing for receiving and discharging the liquid filtrate separated from the liquid-solids mixture by means of centrifugation with a filter cloth turned inwards into the centrifugal drum, a solids housing for receiving and discharging the solids (filter cake) separated from the liquid-solids mixture during further rotation of the centrifugal drum with a filter cloth turned outwards and an annular gap surrounding the edge of the centrifugal drum in the region of the filtrate housing and the solids housing.

Abstract: A device for performing a weight measurement in centrifuges which serve to process chemical substances of different weights and in which fluctuating gas pressures cause different interfering forces which have an interfering effect on the weight measurement. The centrifuge is mounted so as to swivel in a vertical plane, a force measuring element senses the weight-dependent swivel movements of the machine, and a compensation means equalizes the interfering forces caused by the fluctuating gas pressures such that the weight measurement remains unaffected hereby. The compensation means comprises a sensor sensing the gas pressure in the centrifuge, this sensor correspondingly correcting a weight display as a function of changes sensed in the gas pressure.

Abstract: A sleeve filter centrifuge comprises between the closed end wall of a centrifugal drum and a base portion movable relative to this end wall a flexible, extendible dividing wall, for example in the form of a bellows or a folded membrane. This dividing wall provides a seal between a displacing shaft bearing the base portion and the inner chamber of the centrifugal drum accommodating the suspension and prevents any exchange of substances, which, for example, impairs sterilization, between the process area of the centrifugal drum and the machine frame side of the sleeve filter centrifuge.

Abstract: A reverse filter centrifugal machine has a self-contained, rotatably mounted basket (7) in a housing (1), provided with radial filtrate passages (11) and capable of receiving an overpressure or a negative pressure, as well as a lid (19) that closes the free front side of the basket. The basket and the lid are axially movable with respect to one another. A feed opening for the suspension to be filtered is arranged in the lid and a feed pipe (21) is sealingly inserted through the feed opening. The feed pipe (21) is rotatably mounted around its longitudinal axis and can be rotated together with the basket (7) around this axis.

Abstract: A sleeve filter centrifuge comprising a drum rotatably mounted in a housing and having radial filtrate passages, an invertable filter cloth covering the filtrate passages, a cover closing one end face of the drum, a feed opening for the suspension to be filtered provided in the cover, a feed pipe passing through the feed opening, and a safety device preventing the drum being opened by the cover being detached from it for as long as the drum is rotating ar a rotational speed higher than a critical rotational speed, above which any opening of the drum would be dangerous, the drum and the cover being axially displaceable relative to one another by means of a rotatably driven hollow shaft and a support shaft telescopically reciprocating therein in order to invert the filter cloth.

Abstract: A sleeve filter centrifuge comprises a drum with radial filtrate passages (12) which is rotatably mounted in a housing (1), a sleeve filter cloth (15) which covers the filtrate passages, a lid (18) which closes the front of the drum and has a filling opening for suspensions to be filtered, and a filling pipe (19) which penetrates the filling opening. In order to turn up the filter cloth, the drum and the lid can be displaced axially relative to each other by means of a hollow shaft (3) driven in rotation and a support shaft (9) which telescopes in and out of said hollow shaft. A threaded spindle (34) is arranged on the support shaft (9) and a nut (33,36) is engaged with the threaded spindle (34). Either the threaded spindle (34) or the nut (33,36) can be driven in rotation by a motor (44) in such a manner that the support shaft (9) telescopes in and out of the hollow shaft (3) in function of the rotational speed of the threaded spindle (34) or nut relative to the rotational speed of the hollow shaft (3).

Abstract: A method for removing filter cake from a pressure filter element for liquid solid mixtures comprising an outer casing, a removable lid for closing the outer casing, a tubular filter element which projects from the lid into the outer casing and on the outside of which the filter cake is deposited, a membrane which during operation folds back between the outer casing and the filter element, a pressure joint on the outer casing and inlet and outlet of a pressure medium, an inlet line which conveys the liquid-solid mixture into the space between the membrane and the filter element and an outlet line which conveys the filtrate from the interior of the filter element. In order to split off small pieces of the filter cake from the filter element, a gaseous pressure medium is admitted into the filter cake formed on the outside of the filter element for as long as the filter cake is still completely or partly surrounded by the fold back membrane.

Abstract: A pressure filter for suspensions comprises a boiler shaped outer shell (1) the front side of which is closed by a detachable lid (11), a tubular filter element (15) which projects from the lid, a membrane (5) which can be inverted arranged coaxially between the outer shell and the filter element, and a suction and pressure joint (6) arranged on the outer shell. A device for operating the filter comprises a container (25) for a hydraulic fluid (26) which fills the lower part of the container, a gas space (27) to being located above the level of the hydraulic fluid. A first line (21) with a force pump (24) conveys the hydraulic fluid from the lower part of the container to the space between the outer shell and the membrane. A second line (28) connects the space between the outer shell and the membrane with the gas space in the container and communicates with a suction pump (33).

Abstract: An inverted filter centrifuge consisting of a drum arranged to rotate freely in a housing and having radial filtrate outlets; a cover closing one of its free frontal areas, the drum and the cover being mutually axially movable; a filler aperture in the cover for the suspension to be filtered and a filler pipe passing through the filler aperture. The filler aperture in the cover can be hermetically sealed by a locking component rotating together with the drum which is disconnected from the filler pipe in a manner to avoid friction.

Abstract: A pressure filter for suspensions comprises a boiler-shaped outer jacket, a lid coaxially movable relative to the latter and closing the outer jacket, a filter element protruding from the lid and a reversible membrane arranged coaxially between the outer jacket and the filter element so as to turn out of the outer jacket when the filter is opened and to turn back into the outer jacket again when the filter is closed. When the filter is being closed, a negative pressure relative to ambient pressure is generated inside the membrane, and to prevent formation of a single fold protruding at the sides beyond the rim of the outer jacket, the membrane is deformed by external influences until a triple or multiple fold no longer protruding at the sides beyond the rim of the outer jacket forms in the membrane.

Abstract: An invertible filter centrifuge is provided comprising a rotary drum which is mounted in a cantilever manner in a housing and has radial passages for filtrate, a lid which is axially displaceable relative to the drum and closes the free front side of the latter, a filler opening on the lid for suspension to be filtered, and filler pipe which, on the one hand, is secured to the housing and, on the other hand, penetrates the filler opening, the outlet end of the filler pipe being located inside the drum during the centrifuging operation, characterized in that for varying the pressure in the drum (16), the filler pipe (26) is connectable to a pressurization or depressurization source (44) and is sealed by a combined rotary and sliding seal (45, 46, 47, 53) on said lid (25).

Abstract: A filter for squeezing or pressing out suspensions has the following main components: a boiler-shaped outer casing, a cover releasably closing the outer casing at its open end face, a tubular filter element projecting from the cover and an elastic membrane which is arranged between outer casing and filter element and is connected, on the one hand, to the open end face of the outer casing and, on the other, to the end face of the filter element remote from the cover such that the membrane is inverted when the cover is removed coaxially from the outer casing. In a filter of this type, the inner diameter of the slack membrane in the region of the filter element is equal to or smaller than the outer diameter of the filter element.

Abstract: A filter for squeezing or pressing out suspensions has the following main components: a boiler-shaped outer casing, a cover closing the outer casing at its open end, a tubular filter element projecting from the cover and a membrane which is arranged between outer casing and filter element and connected on the one hand to the open end of the outer casing and, on the other, to the end face of the filter element remote from the cover such that the membrane is inverted when the cover is removed coaxially from the outer casing. In a filter of this type, the membrane and the filter element are pivotable or rotatable as a unit about their common axis when the outer casing is in its closed state.

Abstract: A filter centrifuge having a perforated drum in which a filter cloth is disposed with one end firmly attached to the drum and the other end attached to a base plate coaxial and rotatable with the drum, the drum being fastened to a hollow shaft, the interior of the hollow shaft serving as a receiver for another shaft carrying said base plate, the remote end of the shaft forming a piston rod displaceable axially to invert said filter cloth.

Abstract: A filter centrifuge for the separation of solid and liquid components in a suspension in which a filter cloth is used. The filter cloth is inserted in the drum of the centrifuge and is removably fastened at one side about the periphery of an aperture in the drum. The filter cloth is flexible and may be turned inside out to discharge solid materials after the centrifuging operation. To prevent the flexible filter cloth from becoming pressed into the openings of the centrifuge drum by the force of the centrifuging process and the weight of the solid material, a supporting screen is inserted between the inner wall and the drum of the filter cloth. The screen is in the form of longitudinal rods from which the filter cloth is easily removed even if the gaps between the rods are penetrated to a slight extent.