EP1977833A2 - Dispositif de centrifugation - Google Patents

Dispositif de centrifugation Download PDF

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Publication number
EP1977833A2
EP1977833A2 EP08154142A EP08154142A EP1977833A2 EP 1977833 A2 EP1977833 A2 EP 1977833A2 EP 08154142 A EP08154142 A EP 08154142A EP 08154142 A EP08154142 A EP 08154142A EP 1977833 A2 EP1977833 A2 EP 1977833A2
Authority
EP
European Patent Office
Prior art keywords
drum
housing
gap
tube
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08154142A
Other languages
German (de)
English (en)
Other versions
EP1977833A3 (fr
Inventor
Werner Rochus
Bernd Wächter
Matthias Philipp
Eugen Lehr
Peter Stelter
Manfred KÖGL
Horst Seipel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heinkel Holding GmbH
Original Assignee
Heinkel Holding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heinkel Holding GmbH filed Critical Heinkel Holding GmbH
Publication of EP1977833A2 publication Critical patent/EP1977833A2/fr
Publication of EP1977833A3 publication Critical patent/EP1977833A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges
    • B04B3/025—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges with a reversible filtering device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor
    • B04B11/043—Load indication with or without control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/02—Other accessories for centrifuges for cooling, heating, or heat insulating

Definitions

  • the present invention relates to a centrifuge device, in particular an invertible filter centrifuge.
  • Centrifuge devices are well known in the art. In industry, they are mainly used in the chemical and pharmaceutical sectors to separate the solid phase from the liquid phase of a suspension.
  • separating the solid phase from the centrifuge filter and then removing the solid phase from the centrifuge drum may i.a. a distinction is made between three types of centrifuge, first the metal filter centrifuges in which the discharge takes place by means of centrifugal force and radially inwardly directed gas impulse shocks, secondly the peeler centrifuges, in which the solid phase is removed by means of an axially displaceable along the drum shell peeling bottom, and third the inverting filter centrifuges, which use a filter cloth which is everted to discharge the solid phase.
  • Such a Stülpfederzentrifuge is, for example, in the document DE 37 40 411 C2 described.
  • This known Stülpfederzentrifuge is characterized by the fact that a filling tube for changing the pressure in the drum with a pressure or vacuum source connected and sealed by a combined rotary and sliding seal on a lid, wherein the rotary seal the filling tube against the rotating and the sliding seal seals the filling tube against the axially displaceable cover.
  • the product space 19 see FIG. 1 respectively.
  • FIG. 4 the discharge funnel 5 'fluid-tight from the filtrate or collecting area 18 is separated. Otherwise, the dried material in the product space 19 would again contact the liquid 19 ', which is unacceptable for product purity reasons.
  • the opening area 24 ' which is therefore to be sealed, is bounded on the one hand by the drum 10 and on the other hand by the housing 3'. As the drum 10 rotates at peripheral speeds of up to 80 m / s relative to the housing 3 ', contacting seals for sealing the opening portion 24' are eliminated. These would be destroyed due to the resulting frictional heat within a very short time.
  • a centrifuge apparatus comprising a filtrate-permeable drum enclosing a working space and comprising a drum shell and a drum base, a cover axially displaceable relative to the drum for closing a free end face of the drum in a first position and a jacket pipe opening into the working space.
  • a centrifuge device with a drum, a housing and a labyrinth seal
  • the drum has at least one opening in its jacket for discharging fluid during centrifuging of material to be dried in the drum.
  • the housing surrounds the drum along its axis of rotation at least in sections and captures the discharged fluid.
  • the labyrinth seal seals an opening area between the drum and the housing.
  • Labyrinth seals are based on a non-contact sealing principle, making them particularly suitable for the high relative speeds between Make drum and housing present.
  • the desired tightness can be achieved by means of the labyrinth seal according to the invention.
  • a "labyrinth seal” is to be understood as meaning a seal which defines a narrow gap, which is formed undercut, at least in sections, relative to its ends.
  • radial is meant a direction substantially perpendicular to the axis of rotation of the drum in the present case.
  • an angle between the direction and the axis of rotation of about 80 to 90 degrees of “radially” is included.
  • along means a direction substantially coaxial or parallel to the axis of rotation.
  • an angle between the direction and the axis of rotation is from 0 to about 10 degrees from "along”.
  • a direction is to be understood not insignificant from radial and along deviating.
  • an angle between the direction and the axis of rotation is comprised between about 10 and about 80 degrees of "slanting".
  • circumferential is understood to mean a direction substantially in the circumferential direction, the axis of rotation of the drum defining the center of the circle which is decisive for the circumferential direction.
  • a "radial gap” is to be understood as meaning a gap which extends radially to the axis of rotation.
  • an "axial gap” is to be understood as meaning a gap which extends along the axis of rotation.
  • a "fluid” is to be understood as meaning a liquid and / or a gas or a mixture thereof.
  • material to be dried is generally meant a material to which it at least partially withdraw its liquid content.
  • the centrifuge device may be a thrust shaft guided through the drum base, a thrust plate axially coupled to the cover via webs and connected to the thrust shaft and disposed in the first position within the drum, and a filter cloth having a first end in the region of free end face on the drum and with a second end attached to the sliding floor, comprise, wherein the jacket tube opens through the lid in the working space.
  • a filling tube is arranged concentrically in the jacket tube and at least one multifunction tube is arranged between the jacket tube and the filling tube.
  • a plurality of multi-functional tubes may be provided, which are preferably distributed rotationally symmetrically over the circumference of the intermediate space between the jacket tube and the filling tube.
  • more than one multi-functional tube is provided and at least one pair of multi-functional tubes is connected to each other at their working-side end.
  • a fluid may be passed to warm or cool the filling tube.
  • the fluid can also be routed through unconnected multifunctional tubes or through only one multifunctional tube.
  • a sensor device is introduced into the working space through the at least one multifunction tube.
  • a sensor device for example, the temperature of the suspension or the residual moisture of the solid phase of a suspension can be measured and fill level meters or cameras or probes are introduced into the working space.
  • all suitable sensor devices, measuring devices or observation devices are conceivable.
  • the at least one multi-function pipe is provided for venting or for pressurizing the working space. In this way it is possible to apply an overpressure or negative pressure to the working space in order to simplify the centrifuging and further processing of the suspension in the centrifuge device.
  • At least one first and one second radial shaft sealing ring are provided for sealing the jacket tube to the cover, the sealing lips of which rest on the jacket tube and point in the direction of the working space.
  • the at least one multi-functional tube with its working-chamber-side end passes radially outward through the jacket tube, so that the at least one multi-functional tube opens in a first position into a gap between the first and the second radial shaft sealing ring.
  • the intermediate space can be acted upon by a pressurized gas.
  • the pressurized gas flows through between the radial shaft sealing ring and the jacket tube.
  • the radial shaft seals thus stand out from the jacket tube and are not subject to abrasion.
  • a permanent sealing of the working space is guaranteed.
  • a non-contact seal can be provided at high speeds, which is not subject to abrasion, and at shaft standstill or low speeds also provide a secure seal by means of radial shaft seals.
  • the cover forms a first gap channel in a first position with a first housing section, wherein the drum forms a second gap channel with a second housing section, wherein the cover abuts against a contact surface of a drum section in a first position, and wherein the first gap channel, the second gap channel and the contact surface open into an annular space, from which at least one suction channel goes off.
  • the first gap channel or the second gap channel or the contact surface is configured like a labyrinth.
  • the mouth widens into the annulus of at least one of the first gap channel or the second gap channel or the abutment surface in the direction of the annulus on.
  • Fail / Save seal assembly ie even with a failure of a labyrinth seal or arranged on the contact surface between the lid and drum O-rings does not enter the suspension or the filtrate directly into the product space, but only into the annular space and is sucked out of it.
  • suction channels distributed over the circumference several suction channels can be provided.
  • the annular space radially widens in its axial cross section in the region of the suction channels in the direction of drum rotation and at the level of the suction channel a step is provided which leads from the expanded cross section of the annular channel back to its original cross section.
  • the drum is cantilevered and a first housing portion is provided surrounding the drum, wherein a second housing portion is provided which surrounds the bearing, wherein the first housing portion is fixedly connected to the second housing portion, and wherein the second housing portion is arranged on a weighing device.
  • an outer housing may be provided, which surrounds the second housing area and the weighing device and is flexibly connected to the first housing area or the second housing area in a transition region of the first housing area to the second housing area.
  • the second housing portion thus surrounds the storage of the filter drum, i. et al also the shear shaft and the drive devices.
  • the second housing portion is mounted on a weighing device. Now, if a suspension is filled in the floating drum, can be detected by means of the weighing device, how much suspension was filled into the drum.
  • the second housing area is arranged in a different space than the first housing area. That is, at the interface of the first housing portion with the second housing portion is a wall. In the room in which the first housing area is arranged, clean room conditions are generally to be observed, in particular in the pharmaceutical sector. In the room in which the second housing portion is arranged, lower cleanliness and purity requirements are generally given.
  • a housing is to be provided which seals the entire centrifuge device under clean room conditions. Therefore, an outer housing is provided, which surrounds the second housing area and is flexibly connected in a transition area of the first housing area to the second housing area with the first housing area or the second housing area, for example by means of a bellows.
  • the second housing area is sealed in accordance with the clean room conditions to be complied with. Since the first housing portion satisfies these requirements and the outer housing is connected to the first housing portion or the second housing portion by means of a tight bellows, thus the entire centrifuge device is sufficiently sealed. Furthermore, the possibility remains unchanged to measure by means of the weighing device, the amount of suspension in the filter drum. Due to the flexible connection of the first housing portion to the outer housing, the entire centrifuge device may still tilt by a minimum inclination angle due to the suspension-filled and overhung centrifuge drum, which is detected by the weighing device. Of course, corresponding distances between the outer housing and the second housing area are to be observed so that the second housing area does not abut against the outer housing from the inside and a falsification of the measurement result occurs.
  • a filter cloth which is firmly connected at each of its ends with a seal.
  • an O-ring each sewn into the respective seam of the filter cloth may be incorporated into the seal. It can be provided that the filter cloth is attached by clamping the respective O-ring on the drum or on the sliding floor.
  • the filter cloth is provided in a centrifuge device according to the invention.
  • the O-ring By sewing the O-ring into the seam of the filter cloth, the O-ring is firmly attached to the filter cloth.
  • the filter cloth now has two thickened ends each looped around an O-ring. These thickened ends can now simply be clamped in the drum or in the sliding floor. In this way Not only is a tight fit of the filter cloth guaranteed, which can only be solved by tearing the filter cloth during operation, but at the same time ensuring a secure sealing of the clamping seam.
  • the fact that the O-rings are firmly connected to the filter cloth, moreover, the mounting of the filter cloth is simplified.
  • the labyrinth seal on a Abweisring which is fixed to the drum and is designed for rejecting the discharged fluid from the opening area.
  • the deflector ring is attached to a first portion of the drum, in particular to a flange. Due to the high peripheral speeds of the drum during the centrifuging operation, the fluid discharged through the preferably radial openings of the shell flows out of them at a very high speed. The deflector ring now prevents the discharged fluid, which moves at very high speed, from striking or spraying directly onto the opening area. Thus, the tightness of the labyrinth seal increases.
  • the deflecting ring has at least one tear-off edge for a tear-off of fluid discharged radially along at least one surface of the deflecting ring.
  • the fluid discharged from the openings at least partially impinges on the deflector ring. Due to adhesion forces between the surface of the deflector ring and the fluid, the latter tends to flow along surfaces of the deflector ring.
  • the fluid flows substantially in the radial direction because of the radial force acting in the radial direction.
  • the tear-off edge is preferably formed by two surfaces of the deflector ring, which are at an angle to each other. The trailing edge prevents the fluid from substantially flowing from one surface to the other surface.
  • the labyrinth seal has an inner ring which forms a gap with the deflecting ring, in particular a radial and / or axial gap.
  • the housing has a first portion in which it traps the discharged fluid. More preferably, the housing has a second portion adjacent to the second portion to which the inner ring is attached.
  • the inner ring is fixed while the deflector ring moves relative to it during the centrifuging operation.
  • the gap formed represents a flow resistance for the discharged fluid, as far as this tries to traverse the opening area.
  • the tear-off edge is formed circumferentially between surfaces, wherein the surfaces connect a side of the deflection ring facing away from the opening region with the gap.
  • the tear-off edge is provided more radially spaced from the axis of rotation than the gap between the deflecting ring and the inner ring.
  • One or more of the tear-off edges can be designed in such a way. Due to the centrifugal force acting in the centrifuging or the force acting at a standstill gravity, the fluid, which wants to move from the side facing away from the opening portion of the Abweisrings around the trailing edge to the gap, work against these forces, ie increase its energy. This is another hurdle for the fluid trying to move through the opening area. This further increases the tightness of the labyrinth seal.
  • the deflecting ring forms a first axial gap with the inner ring on a side facing the opening region, wherein the first axial gap adjoins the first section of the housing which catches the fluid.
  • Such a trained axial gap is difficult to achieve for the discharged fluid, since it is based on the discharged fluid behind the Abweisring.
  • the deflecting ring forms a first radial gap with the inner ring, which preferably adjoins the first axial gap. This increases the flow resistance through the opening area for the fluid and thus the tightness of the labyrinth seal.
  • the inner ring forms a second axial gap with the drum, which preferably adjoins the first radial gap.
  • the inner ring forms the axial gap with the first portion of the drum.
  • the inner ring on a flash chamber for a condensation of the fluid which by means of a gap, in particular by means of a second axial gap, with the first portion of the housing on the one hand and by means of a gap, in particular by means of a second radial gap, with a Product space on the other hand connected.
  • gases such as water vapor, which otherwise comparatively unhindered the labyrinth seal could happen to be trapped.
  • a “product space” is to be understood here as the area which is essentially free of fluid.
  • the product space is separated from a "filtrate space", ie the area of the centrifuge device which contains the fluid, by means of the labyrinth seal.
  • the product space can also be formed, for example, by the environment.
  • a drainage channel is provided, by means of which the fluid condensed in the decompression chamber can be discharged. Accumulation of fluid in the expansion chamber, which would in the long run lead to a leakage of the labyrinth seal, is thus avoided.
  • the fluid is connected to a discharge line connecting the centrifuge device to the environment.
  • the drainage channel extends through the inner ring and / or through the housing. Such a drainage channel is comparatively easy to provide.
  • the labyrinth seal has an outer ring, which is arranged on the housing and / or the inner ring and forms the second radial gap with the drum.
  • the outer ring is therefore preferably also stationary with respect to the deflecting ring or the drum, like the inner ring.
  • the outer ring with the first portion of the drum forms the second radial gap.
  • the outer ring with the drum forms a third axial gap, which preferably adjoins the second radial gap.
  • the outer ring with a second portion of the drum forms the third axial gap.
  • the outer ring surrounds the inner ring with a Umgreifungsabites.
  • a simple attachment of the outer ring is made possible on the inner ring.
  • the encompassing section forms the second radial section with the drum and / or the third radial gap with the drum.
  • the encompassing portion forms the second radial portion with the first portion of the drum and / or the third radial gap with the second portion of the drum.
  • both the first and the second portion of the drum is formed as a radial projection to the jacket of the drum. This reduces the opening area between the drum and the housing. This can be provided a smaller cross-sectional labyrinth seal, which in turn accommodates their rigidity in particular under the action of the high peripheral speeds in centrifuging. In addition, a simple attachment of the Abweisrings on the first portion of the drum is possible.
  • the first portion of the housing is provided radially further spaced from the axis of rotation than the second portion of the housing.
  • the first and second portions of the housing form a sort of sump for collecting the discharged fluid, wherein the first portion of the housing is associated with the bottom of the tub and the second portion of the housing of the shell of the tub.
  • the first and / or second section of the drum form the opening area together with the second section of the housing. This makes the labyrinth seal easy to provide.
  • the centrifuge device is designed as an invertible filter centrifuge.
  • the invention is particularly suitable for invertible filter centrifuges.
  • the first portion of the drum is formed as a flange of the shell of the drum and the second portion of the drum as a clamping ring, which is connected to the flange and holds a filter cloth of the centrifuge device.
  • the clamping ring is insofar as a double function, as on the one hand holds the filter cloth and on the other hand forms part of the labyrinth seal, namely the third axial gap.
  • the product space is arranged within an application funnel for application of the dried material.
  • the product space can just as well be part of a third section of the housing.
  • FIG. 1 shows a side cross-sectional view of a centrifuge device 100 according to the invention.
  • the centrifuge device 100 comprises a drum 10, which comprises a drum base 14 and a drum casing 16.
  • the drum 10 surrounds a working space 12 in which suspension is introduced through a filling tube 36 provided in a jacket tube 30.
  • the drum 10 is connected to a drive shaft 94, which in turn is driven by a drive device 92.
  • a thrust shaft 32 is provided, which in turn is connected to a sliding floor 24, wherein the sliding floor 24 is arranged in the working space 12.
  • the thrust shaft 32 is axially displaceable relative to the drum 10 by means of a pusher 90.
  • the sliding floor 24 is connected by webs 22 with a cover 20 which closes the drum 10 at a drum bottom 14 opposite end face of the drum 10.
  • the cover 20 has in its center an opening through which the jacket tube 30 is guided and opens into the working space 12.
  • the pusher tray 24 together with the lid 20 is axially moved by the pusher shaft (in FIG. 1 to the left) and the filter cloth 70 everted.
  • the lid 20 slides on the jacket tube 30 and the working space end of the jacket tube 30 enters a recess 33 in the thrust shaft 32 a.
  • the solid phase of the suspension bursts off the filter cloth 70 and falls into a product space 19.
  • the solid phase thus accumulates in the product space 19 and can be removed at the lower end of the product space 19.
  • the drive device 92 and the pusher 90 are disposed above and below the thrust shaft 32 and the drive shaft 94.
  • the drive of the drive shaft 94 and the thrust shaft 32 takes place by means of suitable belt or chain drives.
  • the drive device 92 and the pusher 90 are then arranged axially aligned with the drive shaft 94 and the thrust shaft 32 and a corresponding rotor of the drive device 92 or the pusher 90 is frontally coupled to the respective shaft.
  • the drive shaft 94 and the thrust shaft 32 also directly form the rotors of the drive device 92 and the pusher 90 (direct drive).
  • water-cooled, permanent-magnet electric motors are used as the drive device or thruster in this case in order to provide a dynamic, fast acceleration of the shafts 32, 94 and a good control behavior of the motors 90, 92.
  • the drive device 92 and the pusher 90 are arranged in this case immediately around the waves, since the shafts 32, 94 form the rotors of the drive device 92 and the pusher 90, one is able by such a direct drive, the overall height the entire centrifuge device 100 to reduce substantially.
  • the product space 19, the filtrate space 18 and the drum 10 are surrounded by a first housing area 80.
  • This first housing region 80 which is also referred to as a process housing, is connected to a second housing region 82, which is also referred to as a bearing inner housing.
  • the bearing inner housing is mounted on a weighing device 86 and vibration dampers 87.
  • the drum 10 is cantilevered so that the process housing 80 is supported by the bearing inner housing 82 and is otherwise unsupported itself.
  • an outer housing 84 is provided which surrounds the bearing inner housing 82 and the weighing device 86 and the damper 87.
  • the outer housing 84 has a circular opening through which the process housing 80 is connected to the bearing inner housing 82. Since the drum 10 is cantilevered, the drum 10, when filled with suspension, tilts slightly downwards. The process housing 80 and the bearing inner housing 82 thus virtually tilt about the bearing point 87, which is detected by the weighing device 86.
  • the outer housing 84 can not be fixedly attached to the process housing 80 or the bearing inner housing 82 in the region of the circular passage point, since it would otherwise be tense at this point and the outer housing would absorb some of the forces themselves, whereby the Measurement result of the weighing device 86 is falsified. Therefore, the outer housing 84 is flexible by means a bellows 88 at the passage point opposite the bearing inner housing 82 completed. Of course, it can also be provided that the outer housing 84 is closed by means of the bellows 88 with the process housing 88. The flexible bellows 88 absorbs no forces and allows the slight inclination movement of the process housing 80 and the bearing inner housing 82nd
  • FIG. 2 shows an enlarged cross-sectional view of a passage region of the jacket tube 30 through the cover 20th
  • the jacket tube 30 is hollow, and has in its interior a concentrically arranged filling tube 36, through which the suspension is filled into the working space 12 of the centrifuge device 100. It is provided that the filling tube 36 is supported at its working space end by connecting webs 35 on the casing tube 30.
  • the multifunctional tubes 34 for example, sensor devices can be introduced into the working space 12 in order to measure any parameters of the suspension, in particular the residual moisture. However, it is also possible to introduce probes into the working space 12 in order to examine them. Furthermore, it can be provided to inject a flushing fluid into the working space 12 in order to clean it.
  • a hot or cold fluid may be passed through the multifunction tubes 34 to heat or cool the fill tube 36 and adjust its temperature to the temperature of a suspension and chemical reactions or phase changes of the suspension during flow through the fill tube 36 to avoid. In particular, so condensation should be avoided a suspension on the filling tube 36.
  • the fluid used for cooling or heating the filling tube 36 does not enter the working space 12, it may be provided that some of the multifunction tubes 34 are in pairs at their working space side Connect end together, so as to allow a fluid circuit.
  • two radial shaft seals 40, 42 are provided.
  • the radial shaft seals 40, 42 are each supported on a projection 43, 45, so that their sealing lip in each case points in the direction of the working space 12 and rests on the jacket tube 30.
  • the projections 43, 45 do not touch the jacket tube 30, but each form with this an annular gap. Between these annular gaps is a gap 44.
  • one of the multifunctional channels 34 ' does not open into the working space 12, but is bent radially outwards and exits through the jacket tube 30 so that it opens into the intermediate space 44.
  • the intermediate space 44 can be acted upon by a compressed gas. This can cause the gap 44 to have a higher pressure than the working space 12 and the environment.
  • the compressed gas constantly flows out of the intermediate space 44 through the annular gaps out of the intermediate space 44 and in the direction of the environment or of the working space 12. In this way, it is not possible for a suspension located in the working space 12 to move counter to the flow direction of the compressed gas to penetrate an annular gap in the intermediate space 44.
  • the radial shaft seals 40, 42 are on the jacket tube and seal the jacket tube also on the lid 20, so that the area is sealed even if the drum 10 is not rotating or if no compressed gas through the multi-functional channel 34 'in the space 44 is initiated.
  • FIG. 3 shows in a partial section A in the area indicated by dashed lines in FIG FIG. 1 the special design of a seal in the opening area 24 '(transition area between the filtrate space 18 in the product space 19).
  • the liquid phase of the suspension is discharged through the filtrate 18.
  • the filtrate should not get into the product space 19 in order not to re-mix there with the solid phase of the suspension. Therefore, the product space 19 must be sealed off from the filtrate space 18.
  • the drum 10 and the lid 20 rotate during centrifuging against a stationary first housing portion 52 (the dispensing funnel 5 ') and a stationary second housing portion 50 (of the housing 3').
  • a stationary first housing portion 52 the dispensing funnel 5 '
  • a stationary second housing portion 50 of the housing 3'.
  • the drum shell 10 with a second housing portion 50 forms a second gap channel 60, which is formed like a labyrinth and thus forms a labyrinth seal.
  • a collecting recess 61 is further formed, which additionally reduces the probability that some of the filtrate will enter the first gap channel 60.
  • the cover 20 forms with a first housing portion 52 a first gap channel 62.
  • the cover 20 bears against a clamping ring 42 'of the drum 10 against a contact surface 64.
  • Both the first gap channel 62 and the second gap channel 60 and the contact surface 64 open into an annular space 66.
  • particles should creep through one of the gap channels 60, 62 or the contact surface 64, they enter the annular space 66. From the annular space 66 they are constantly sucked through a suction channel 68.
  • the first gap channel, the second gap channel and the contact surface 64 are widened in diameter in the direction of the annular space 66 to reduce the speed of a fluid passing through one of the gap channels 62, 60 or the abutment surface 64 and to increase the suction of the suction channel 68 ,
  • FIG. 4 shows an alternative embodiment of the sealing system in FIG. 3 .
  • FIG. 4 embodiment shown can be installed as a retrofit in existing centrifuge devices to replace the existing sealing systems there.
  • the jacket 16 of the drum 10 is formed with a radial flange 40 'at its feed hopper end. On the flange 40 ', for example by means of a bolt 41' of the clamping ring 42 'attached. The flange 40 'and the clamping ring 42' keep the edge portion 11 'of the filter cloth 70 clamped between them.
  • a housing portion 50 of the housing 3 ' is composed of a housing wall 43' and a housing flange 44 ', which is arranged at the discharge funnel-side end of the housing wall 45' connected thereto.
  • the housing flange 44 ' is fastened to a funnel flange 45' of the dispensing funnel 5 ', the funnel flange 45' adjoining a funnel wall 46 ', which together form a housing section 52 of the dispensing funnel 5'.
  • the flange 40 'and the clamping ring 42' form, together with the flange 44 'and the flange 46' between the opening portion 24 ', which is to be sealed fluid-tight.
  • the opening region 24 ' is closed fluid-tight by a labyrinth seal 47'.
  • the labyrinth seal 47 ' is composed of a repelling ring 48', an inner ring 49 'and an outer ring 50' together.
  • the deflector ring 50 ' is attached to the flange 40' on its side 51 'facing the opening region 24'.
  • the deflector ring 48 'thus rotates with the drum 10 about the axis of rotation 8'.
  • the fluid 19 'emerging from the bores 20' at high speed impinges.
  • the axis of rotation 8 'of the drum 10 is shown for better understanding, but in relation to Fig. 1 been brought to the jacket 16 to represent them on the paper can.
  • the deflector ring 48 ' has a preferably obliquely extending bore 53', which also has one preferably obliquely extending bores 20 'in the jacket 16 is in fluid communication.
  • bore 20 'extends preferably radially.
  • a surface 54 ' which faces away from the opening region 54', ie faces the collecting region 18, adjoins the bore 53 'radially away from the axis of rotation 8' of the drum 10.
  • Adjoining the surface 54 ' is a surface 55' facing away from the opening region 24 '.
  • the fluid flow 19' tears off, that is, the fluid flow 19 ', which wets the surface 54', separates at the rupture edge 56 'of the Abweisring 48' and moves, for example, along the arrow 57 'in the direction the housing wall 450.
  • the surface 55 ' is in turn followed by a surface 58'.
  • the surface 58 ' faces the opening region 24' and forms with the surface 55 'a tear-off edge 59'.
  • the surface 64 ' is partially against the flange 40' at. This preferably results in a substantially hook-shaped cross section for the deflector ring 48 ', as in FIG. 4 illustrated.
  • the inner ring 49 ' is preferably connected to the housing flange 44' and therefore provided with respect to the axis of rotation 8 'fixed.
  • the inner ring 49 ' preferably has a hook-shaped portion 65' which is formed with the surfaces 62 'and 64' of the Abweisrings 48 'opposite surfaces, each forming an axial gap 66' and a radial gap 67 'between them.
  • the axial gap 66 ' opens at its one end into the collecting area 18 and at the other end it communicates with the radial gap 67' in connection.
  • the hook-shaped portion 65 'of the inner ring 49' further forms an axial gap 68 'with the flange 40'.
  • the expansion chamber 69 ' is connected via a drainage channel 73' with, for example, a discharge line, not shown.
  • the expansion chamber 69 ' is formed between the hook-shaped portion 65' and a retaining portion 69a 'for a clinching portion 70' of the outer ring 50 '.
  • the expansion chamber 69 ' there is a lower pressure than in the collecting area 18, which means that, for example, solvent vapors of the fluid 19' can condense in the expansion chamber 69 'and be discharged via the drainage channel 73'.
  • the outer ring 50 ' is preferably attached to the inner ring 49' by means of a clincher portion 70 '.
  • the encompassing portion 70 ' forms with the flange 40' a radial gap 71 ', which adjoins the expansion chamber 69'.
  • the encompassing portion 70 'of the outer ring 50' preferably further forms with the clamping ring 42 'an axial gap 72' which adjoins the radial gap 71 'and opens into the product space 19'.
  • the axial and radial gaps 66 ', 67', 68 ', 71', 72 ' preferably define a path for the fluid 19' which extends to the axis of rotation 8 '. That is, the axial gap 66 'is farthest furthest from the axis of rotation 8' and the axial gap 72 ' far from the axis of rotation 8 'is spaced. Thus, a fluid 19 'must move against the centrifugal force through the radial gaps 67' and 71 'to pass from the catchment area 18 into the product space 19, which is admittedly very heavy. For the same reason, the axial gap 66 'is less far from the axis of rotation 8' spaced than the tear-off edge 59 '.
  • FIG. 5 shows a cross-sectional view of the sealing system in FIG. 3 or 4 in a plane on the view in FIG. 3 or 4 is vertical.
  • the annular space 66 according to the embodiment according to FIG. 3 or the expansion chamber 69 'according to the embodiment according to FIG. 4 extends around the entire circumference around the lid 20 and the drum 10 around. Since possibly in the annulus 66 and relaxation chamber 69 'located fluid particles are entrained by the rotating drum 10 and the rotating clamping ring 42' in the rotational direction ( ⁇ ) and by the radially outward forces against the outer periphery of the annular space 66 and the expansion chamber 69 'are pressed, it is provided that the annular space 66 and the expansion chamber 69' in sections expands radially outward.
  • the fluid particles located in the annular space thus move along the outer circumference of the annular space 66 or the expansion chamber 69 'in the direction of rotation (Q) and abut against a stop surface 67. At the height of this stop surface 67 a suction channel 68 or 73' is provided. Thus, in addition, the probability is increased that the fluid particles located in the annular space 66 or in the expansion chamber 69 reach the suction channel 68 or 73 '.
  • FIG. 6 shows a filter cloth 70, in whose seams in each case an O-ring 72, 74 is sewn, so that the O-rings 72, 74 are firmly connected to the filter cloth 70 and non-destructive can not be separated from the filter cloth 70.
  • Such a filter cloth 70 can be used in a centrifuge device 100 according to the invention.
  • the filter cloth 70 is clamped with its one end or O-ring 74 between the drum shell 16 of the drum 10 and a corresponding clamping piece 42 '.
  • the other end of the filter cloth 70 with the 0-ring 72 is clamped to the sliding floor 24 with a second clamping piece 71.
  • a particular advantage of the filter cloth 70 is that the sewn O-rings 72, 74 not only allow the clamping of the filter cloth 70, but at the same time seals the clamping seam between the clamping piece 42 'and the drum shell 16 and thus the working space 12 to the outside. An additional separate seal is not provided.
  • the clamping seam opens into the annular space 66, so that a fail-safe sealing system is also provided for the seal 74 of the clamping seam.
  • the described centrifuge device of the present invention eliminates the problems associated with prior art sealing systems and provides improved sealing systems that enable clean room conditions to be met.

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  • Centrifugal Separators (AREA)
EP08154142A 2007-04-05 2008-04-07 Dispositif de centrifugation Withdrawn EP1977833A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007017982A DE102007017982A1 (de) 2007-04-05 2007-04-05 Zentrifugenvorrichtung

Publications (2)

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EP1977833A2 true EP1977833A2 (fr) 2008-10-08
EP1977833A3 EP1977833A3 (fr) 2009-11-04

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EP08154142A Withdrawn EP1977833A3 (fr) 2007-04-05 2008-04-07 Dispositif de centrifugation

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EP (1) EP1977833A3 (fr)
DE (1) DE102007017982A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015003058B3 (de) * 2015-03-06 2016-06-16 Contecma C. S. Gmbh Stülpfilterzentrifuge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740411C2 (de) 1987-11-28 1996-11-14 Heinkel Ind Zentrifugen Stülpfilterzentrifuge

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2710624C2 (de) * 1977-03-11 1985-09-19 Heinkel Industriezentrifugen GmbH + Co, 7120 Bietigheim-Bissingen Stülpfilterzentrifuge
DE3430508A1 (de) * 1984-08-18 1986-02-27 Heinkel Industriezentrifugen GmbH + Co, 7120 Bietigheim-Bissingen Filterzentrifuge
DE29723393U1 (de) * 1997-01-31 1998-08-06 Krauss-Maffei AG, 80997 München Stülpfilterzentrifuge
DE19732006C1 (de) * 1997-07-25 1998-11-19 Heinkel Ind Zentrifugen Vorrichtung zur Durchführung einer Gewichtsmessung bei Zentrifugen
JP2002177821A (ja) * 2000-12-14 2002-06-25 Okawara Mfg Co Ltd ろ布反転式遠心分離機における分離成分の再混合防止方法並びにその構造
DE10311997A1 (de) * 2003-03-19 2004-10-07 Johannes Gerteis Stülpfilterzentrifuge
DE202005009778U1 (de) * 2005-06-15 2005-09-01 Fima Maschinenbau Gmbh & Co. Kg Zentrifugenvorrichtung mit verbesserter Prozessanalysentechnologie
DE102005028832A1 (de) * 2005-06-15 2006-12-28 Fima Maschinenbau Gmbh Zentrifugenvorrichtung mit verbesserter Prozessanalysetechnologie

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740411C2 (de) 1987-11-28 1996-11-14 Heinkel Ind Zentrifugen Stülpfilterzentrifuge

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Publication number Publication date
EP1977833A3 (fr) 2009-11-04
DE102007017982A1 (de) 2008-10-09

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