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EP0652051A1 - Dispositif d'étanchéité pour tambour d'une centrifugeuse à filtre réversible - Google Patents

Dispositif d'étanchéité pour tambour d'une centrifugeuse à filtre réversible Download PDF

Info

Publication number
EP0652051A1
EP0652051A1 EP94117077A EP94117077A EP0652051A1 EP 0652051 A1 EP0652051 A1 EP 0652051A1 EP 94117077 A EP94117077 A EP 94117077A EP 94117077 A EP94117077 A EP 94117077A EP 0652051 A1 EP0652051 A1 EP 0652051A1
Authority
EP
European Patent Office
Prior art keywords
filter
filter drum
sealing head
filling
centrifuge according
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Withdrawn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
EP94117077A
Other languages
German (de)
English (en)
Inventor
Johann Feller
Erich Dommer
Michael Liebl
Johann Messner
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.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei AG
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 Krauss Maffei AG filed Critical Krauss Maffei AG
Publication of EP0652051A1 publication Critical patent/EP0652051A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to an inverting filter centrifuge with a filter drum which is mounted so as to be self-supporting and rotatable in a housing, with a filter drum cover which closes the free end face and can be displaced in the axial direction of the filter drum, with a filling opening provided in the filter drum cover for the suspension to be filtered, with a filling opening penetrating into the filling opening sealingly receptacle and in its radially mounted filling tube, the free end opens in the operating state with the filter drum cover closed in the filter space enclosed by the filter drum.
  • Such an inverting filter centrifuge is known from DE 37 40 411 A1.
  • suspension liquid is filled through the filling pipe into the filter space, the suspension liquid being accelerated to the drum peripheral speed due to the rotation of the filter drum.
  • Splashes occur due to the suspension liquid striking installations in the filter drum, for example connections between the filter chamber cover and a moving floor. If there is insufficient sealing between the filter chamber cover and the filling pipe, splashes can get out of the filter chamber into the solids chamber located on the other side of the filter chamber cover.
  • a seal The filling opening between the filling pipe and the filter chamber cover is to be aimed at, because it can happen by moistening the surface of the solids chamber that the solid discharged after the separation process is moistened again when this liquid is touched, thus negatively influencing the product quality and the humid mixture that forms can stick from solid and liquid in the solid discharge, which leads to a poorer discharge behavior of the machine and consequently causes cross-contamination between the individual centrifuge batches.
  • an insufficient sealing effect between the filling pipe and the drum cover can lead to high compressed gas consumption during operation with excess pressure in the filter drum, and it may even not be possible to achieve a sufficient operating pressure in the filter drum.
  • this seal is created by a bearing head inserted into the filling opening and connected to the filter chamber cover, which receives the outer ring of a ball bearing.
  • the inner ring of the ball bearing is attached to a sleeve sealingly inserted into a central bore of the bearing head, so that the sleeve can be rotated relative to the bearing head about the axis of rotation of the filter drum.
  • the inside of the sleeve is provided with a plurality of seals which act in the axial direction and which seal the filling tube passed through the sleeve.
  • the filling tube In the front area, adjacent to its free end, the filling tube is provided with a larger diameter, the transition from the smaller diameter to the larger diameter being formed by a conical section. In this way there is a slight axial displacement of the filter chamber cover in the area of the smaller diameter of the filling pipe and at the same time ensures a secure seal with a high sealing force when the filter chamber cover is closed.
  • This seal is complicated and complex due to the provision of the seals in two levels, in a first level for sealing in the axial direction and in a second level for sealing in the radial direction. Due to the design of the filling pipe with a graduated diameter, the translational seals acting in the axial direction have to overcome a large difference in diameter. Since the translational seals have to be moved over a large distance, in which the diameter of the filler pipe is also smaller than in the main seal plane, there is a risk that impurities on the filler pipe shaft will not be completely cleaned by the seals and thus can get into the sealing system and so on This can contaminate the space between the translation seals.
  • the filling tube is held in the middle of the sleeve only by the translation seals, as a result of which the seals are unevenly loaded by the filling tube, for example if the centrifuge is unbalanced. This can lead to premature seal wear.
  • a sealing of the filling opening between the filter chamber cover and the filling pipe, which also serves only as a splash guard, is known from DE 34 30 507 C2.
  • There is only an annular plate surrounding the filling tube is fastened to the filter chamber cover, wherein in the filter chamber, surrounding the filling tube, labyrinth-like screens or sealing edges are provided.
  • This seal has many dead spaces that are difficult to clean. In addition, this seal is not designed for excess pressure within the filter space.
  • the filling tube is only guided through the ring-shaped plate in the filling opening of the drum cover, as a result of which it is subject to high wear.
  • a socket is inserted into the filling opening, which is connected to the filter chamber cover, and is provided with an inflatable ring hose in the region of its inner circumference.
  • This ring tube surrounds the filling tube guided through the bushing, and a sealing effect on the circumference of the filling tube is to be achieved by inflating the ring tube.
  • a complex duct system with a rotating union is required.
  • the seal can only be made against overpressure, but not against overfill splashes, since the seal is constructed in such a way that the filling tube must be removed from the interior of the drum before it is actuated.
  • inverting filter centrifuge is known from WO 92/04 982.
  • both the filter drum with the filter chamber cover and the filling tube are rotatably supported, whereby for filling the annular gap between the filling tube and the inner circumference of the filling opening by means of an inflatable seal in the region of the free end of the filling tube, the filling tube with essentially must rotate at the same rotational speed as the filter chamber cover in order to prevent excessive wear of the inflatable seal.
  • This seal structure has a complicated structure due to the rotating filling tube and the necessary pressure medium passage through the filling tube to the inflatable seal. Therefore, a high, costly manufacturing effort and a high maintenance effort are required. Due to this complicated structure, this sealing arrangement is also prone to errors.
  • the required synchronous speed of the filter drum and filler pipe for coupling the filler pipe to the filter drum cover also requires a high level of design effort and a high level of control effort, which also results in high costs.
  • the filling tube is axially displaceable in that a sealing head is provided, which is mounted on the filling tube in the region of its free end in the axial direction and rotatably about the filling tube that the sealing head is sealed with at least one seal against the outer circumference of the filler tube and that the sealing head and the filter drum cover are designed for mutually sealing and essentially rotationally fixed engagement relative to one another.
  • the sealing head has a conical outer surface over at least part of its axial extent, the conical angle of which is adapted to the conical angle of the likewise conical inner circumferential surface of the filler opening, and if the conical outer surface and the conical inner circumferential surface act in a sealing manner, then an easily detachable and reliably sealing and torque-transmitting element Connection between the sealing head and the filter chamber cover achieved. It is advantageous if at least one seal is provided between the conical outer surface and the conical inner peripheral surface, which is advantageously formed by an O-ring.
  • a particularly effective seal between the conical outer surface and the conical inner circumferential surface is achieved if two seals are provided which are arranged one behind the other in the axial direction and are preferably formed by an O-ring inserted into a groove formed in the conical outer surface.
  • the provision of O-rings as a seal between the sealing head and the filter chamber cover also creates a desired elasticity between the sealing head and the filter chamber cover.
  • a particularly reliable axial guidance and axial fixation of the sealing head on the filling pipe is achieved if a rolling bearing is provided for the rotatable mounting of the sealing head on the filling pipe, which is designed in addition to the transmission of force in the radial direction and also for an axial transmission of force between the filling pipe and the sealing head.
  • the rolling bearing is advantageously formed by a deep groove ball bearing.
  • a particularly reliable seal between the sealing head and the outer circumference of the filling tube is achieved if a lip seal facing the filter chamber is provided on the filter chamber side is because this lip seal directed towards the filter chamber seals particularly effectively against an overpressure prevailing in the filter chamber.
  • the sealing effect between the sealing head and the outer circumference of the filling tube is further increased by a lip seal on the solids space side, which is directed towards the solids space located on the side of the filter space cover used by the filter space. If the roller bearing is arranged between the two lip seals, it is protected against contamination from the filter space or from the solids space.
  • a first piston-cylinder unit connected to the filter chamber cover is provided for the axial displacement of the filter chamber cover
  • a piston-cylinder unit is also provided for the axial displacement of the filling pipe, the piston of which is connected to the filling pipe is. In this way, the control can be simplified by jointly applying pressure fluid to the two piston-cylinder units.
  • the second piston-cylinder unit has a cylinder space on both sides of the piston, a first cylinder space for moving the sealing head in the closing direction being able to be filled with pressurized fluid, but the second cylinder space cannot be pressurized and if the closing force for the sealing head is less than the opening force applied by the first piston-cylinder unit for the filter chamber cover.
  • This coupled control between the piston-cylinder unit for the filter chamber cover and the piston-cylinder unit for the filling tube means that there is no need for a separate stroke control for the filling tube.
  • the filling tube moves synchronously with the drum cover when the piston-cylinder unit for the filter chamber cover is activated Opening direction, so that the filter drum can be opened at any time, regardless of whether the piston-cylinder unit of the filling pipe presses the sealing head onto the filter chamber cover or not.
  • FIG. 1 shows an inverting filter centrifuge, in which a hollow shaft 6 is rotatably mounted on a stationary machine frame 8 in roller bearings 62, 63.
  • a filter drum 1 is flanged to one end of the hollow shaft 6 and is located in a housing 80 connected to the machine frame 8.
  • the other end of the hollow shaft 6 protrudes from the machine frame 8 and there has an outer section 61, the diameter of which is larger than that of the inner section 60 of the hollow shaft 6 located within the machine frame 8.
  • an outer section 61 On the circumference of the outer section 61 near the Transition to the inner section 60, a V-belt groove 64 is provided, which receives a V-belt 65, which is acted upon by a drive motor 83 and is used to drive the hollow shaft 6.
  • the free end of the outer section 61 is provided with an end plate 66.
  • a thrust shaft 3 is arranged within the hollow shaft 6 and is mounted in a rotationally fixed but axially displaceable manner with respect to the hollow shaft 6.
  • a filter chamber-side seal 68 is provided in the region of the end of the inner section 60 on the filter chamber side, which seals the gap between the hollow shaft 6 and the thrust shaft 3 with respect to the interior of the filter drum 1.
  • a cylinder-side seal 67 is provided between the hollow shaft 6 and the thrust shaft 3, which seals the gap between the inner section 60 of the hollow shaft 6 and the thrust shaft 3 with respect to the interior of the outer section 61 of the hollow shaft 6.
  • a piston 31 of a first piston-cylinder unit 30 is fastened, which is axially displaceable in the cylinder 32 formed by the outer section 61 of the hollow shaft 6.
  • the interior of the outer section 61 of the hollow shaft 6 is divided by the piston 31 into a first cylinder space 33 and a second cylinder space 33 ′.
  • a centrifugal force lock 7 is provided in the second cylinder space 33 ', which has arms 71 which are fastened to the end plate 66, extend axially parallel and are provided with an additional mass 70, each of which has an outward end at its free end protruding hook-like approach 72 are provided.
  • the piston 31 is provided on its side facing the second cylinder space 33 'with an axial bore 31' having an annular groove into which the arms 71 protrude.
  • the arms 71 pivot elastically radially outward, and the hook-like projections 72 engage in the annular groove 31 '. In this way, the piston 31 is locked in the axial direction.
  • the filter drum 1 consists of a filter drum base 10 connected to the hollow shaft 6, which extends in a radial plane with respect to the axis 6 'of the hollow shaft 6 which simultaneously forms the axis 1' of the filter drum 1 and is connected on its outer circumference to an axis-parallel filter drum shell 11.
  • the filter drum 1 can be closed on its open end by an axially movable filter drum cover 2.
  • a sliding floor 20 which also extends radially to the axis 6 'and is connected to the filter drum cover 2 via axially parallel spacer bolts 21 and, when the filter drum 1 is closed, is adjacent to the filter drum floor 10.
  • the push floor 20 is attached to the filter drum end of the push shaft 3, so that an axial movement of the push shaft 3 causes an axial movement of the push floor 20 and the filter drum cover 2.
  • a hose-like filter cloth 12 extends between the outer circumference of the push floor 20 and the free end circumferential edge of the filter drum jacket 11, which is attached with its first axial end to the push floor 20 and with its second axial end to the filter drum jacket 11 in the region of the free end face of the filter drum 1 .
  • the filter drum jacket 11 is provided on its circumference with outlet bores 13 for filtrate exiting from the interior of the filter drum 1 into the filtrate space 81 of the housing 80 surrounding the filter drum.
  • a partition 84 which is located in a radial plane with respect to the axis 1 ′, which essentially corresponds to the radial plane of the filter chamber cover 2 when the filter drum 1 is closed.
  • the separating wall 84 separates the filtrate chamber 81 surrounding the filter drum 1 from a solid chamber 82 essentially tightly.
  • the filter drum cover 2 is provided with a central filling opening 22, through which a filling pipe 4 penetrates from the outside into the interior of the filter drum 1.
  • the filler tube 4 is axially displaceably mounted in a housing extension 85 located outside the solid space 82, the filler tube axis 4 'being essentially identical to the axis of rotation 6' of the hollow shaft, which at the same time forms the displacement axis for the thrust shaft 3.
  • a second piston-cylinder unit 40 is provided in the housing shoulder 85, the cylinder 42 of which is formed by the cylindrical housing shoulder 85.
  • a piston 41 connected to the filling tube 4 is arranged to be axially movable back and forth.
  • the piston 41 divides the interior of the cylinder 42 into a first cylinder space 44 and a second cylinder space 44 '.
  • a sealing head 5 is provided, which is axially fixed with respect to the filling tube 4 and rotatable about the filling tube 4.
  • the sealing head 5 serves to seal the filling opening 22 when the filter drum 1 is closed by the filter drum cover 2 resting against the circumferential edge of the filter drum shell and the filling tube 4 projects into the filter drum. In this way, escape of suspension to be filtered, which is passed through the filling pipe 4 into the filter drum 1, is prevented through the part of the filling opening 22 surrounding the filling pipe 4 into the solid space 82.
  • the filling opening 22 of the filter drum cover 2 has a conical inner circumferential surface 22 'and thus widens towards the solids space 82.
  • the sealing head 5 has a conical insert 50 which is adjacent to the free end 43 and tapers towards the filter drum cover 2.
  • the cone insert 50 is rotatably mounted on the filling tube 4 by means of a deep groove ball bearing 52 and is axially stationary. On its side facing away from the free end 43, the cone insert 50 is connected to an annular flange plate 51 which fixes the cone insert 50 on the outer race 52 'of the deep groove ball bearing 52 in the axial direction.
  • two grooves 53', 54 ' are formed axially spaced apart, in each of which an O-ring 53, 54 is inserted.
  • the two O-rings 53, 54 seal the conical outer surface 50 'against the conical inner circumferential surface 22' of the filling opening 22.
  • the cone angles of the filling opening 22 and the cone insert 50 are essentially the same, so that the inner circumferential surface 22 'and the conical outer surface 50' run essentially parallel.
  • the double sealing of the sealing head 5 with respect to the filling opening 22 by means of the two O-rings 53 and 54 ensures particularly high tightness even with large pressure differences.
  • a first lip seal 55 is inserted therein, which surrounds the filling tube 4 and lies sealingly against the outer circumference of the filling tube.
  • the lip seal 55 is directed towards the interior of the filter drum, so that an excess pressure in the filter drum increases the sealing effect of the lip seal 55.
  • the annular one Flange plate 51 arranged a further lip seal 56, which also surrounds the fill tube 4 and seals against the outer circumference of the fill tube.
  • the further lip seal 56 is directed towards the solids space 82 in order to seal off the solids space.
  • the inverted filter centrifuge shown is used to discontinuously separate solid-liquid mixtures (suspensions).
  • suspension is passed through the filling pipe 4 into the interior of the filter drum 1, the filter drum 1 rotating at an arbitrarily adjustable speed.
  • the rotational movement of the filter drum 1 presses the suspension onto the filter drum casing 11, the solid being retained by the inserted filter cloth 12 and the liquid penetrating the filter cake and the filter cloth 12 forming and being thrown out of the filter drum 1 via the outlet bores 13. As a result, it reaches the filtrate chamber 81, from which it flows.
  • the interior of the filter drum 1 can be acted upon by a pneumatic pressure, for example via the filling pipe 4. This speeds up the process of spinning off the liquid. If the suspension liquid has been thrown out of the filter cake to a desired extent, the filter drum cover 2 and the push floor 20 are pushed through by means of the axially displaceable push shaft 3 Pressurization of the cylinder space 33 'of the first piston-cylinder unit 30 moves to the left in FIG. 1, as a result of which the filter drum cover 2 and the push floor 20 are moved out of the filter drum 1. With the moving floor 20, the filter cloth 12 attached to it is also moved outward and turned inside out, whereby the filter cake adhering to the filter cloth 12 is also pushed out of the filter drum 1 and exits into the solid space.
  • the thrust exerted by the first piston-cylinder unit 30 on the thrust shaft 3 and thus on the filter drum cover 2 is greater than that of the second piston-cylinder unit 40 in the closing direction of the sealing head 5 on the filling tube 4 by introducing pressure into the Cylinder space 44 applied force, so that actuation of the first piston-cylinder unit 30 in the opening direction of the filter drum cover 2 simultaneously causes a displacement of the sealing head 5 and the filling tube 4. This means that there is no need to apply pressure to the cylinder space 44 ′ of the second piston-cylinder unit 40.
  • the filling opening 22 is closed by the sealing head 5 when the filter drum 1 is not rotating, as a result of which no wear occurs on the O-ring seals 53 and 54 between the sealing head 5 and the filter drum cover 2.
  • the filter drum 1 Only after the filling opening 22 has been closed by the sealing head 5 is the filter drum 1 set in rotation, as a result of which the sealing head 5 rotates at the same speed via a frictional connection in the region of the conical surfaces 22 'and 50' and the O-rings 53 and 54 how the filter drum 1 is displaced.
  • This co-rotating sealing head 5 therefore ensures low wear and effective sealing between the filling pipe 4 and the filter drum cover 2 even at high pressure differences.

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  • Centrifugal Separators (AREA)
EP94117077A 1993-11-04 1994-10-28 Dispositif d'étanchéité pour tambour d'une centrifugeuse à filtre réversible Withdrawn EP0652051A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4337618 1993-11-04
DE4337618A DE4337618C1 (de) 1993-11-04 1993-11-04 Stülpfilterzentrifuge (Trommelraumabdichtung)

Publications (1)

Publication Number Publication Date
EP0652051A1 true EP0652051A1 (fr) 1995-05-10

Family

ID=6501765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117077A Withdrawn EP0652051A1 (fr) 1993-11-04 1994-10-28 Dispositif d'étanchéité pour tambour d'une centrifugeuse à filtre réversible

Country Status (3)

Country Link
US (1) US5472602A (fr)
EP (1) EP0652051A1 (fr)
DE (1) DE4337618C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705788C1 (de) * 1997-02-14 1998-07-30 Guenther Hultsch Diskontinuierlich arbeitende Filterzentrifuge

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316081C1 (de) * 1993-05-13 1994-08-04 Heinkel Ind Zentrifugen Vorrichtung zur Durchführung einer Gewichtsmessung bei Zentrifugen
DE19525567A1 (de) * 1995-07-13 1997-01-16 Krauss Maffei Ag Stülpfilterzentrifuge
DE19537562A1 (de) * 1995-10-09 1997-04-10 Baumann Schilp Lucia Gehäusedichtung für Entwässerungseinrichtung
DE19703353C2 (de) * 1997-01-30 2003-10-09 Krauss Maffei Process Technolo Verfahren zum Betrieb einer Filterzentrifuge
AU7153998A (en) * 1997-04-25 1998-11-24 Washington State University Research Foundation Semi-continuous, small volume centrifugal blood separator
KR100493113B1 (ko) 2001-12-07 2005-05-31 주식회사 코오롱 편물로 보강된 복합 중공사막
DE102011010072B4 (de) 2011-02-01 2013-08-22 Contecma C. S. Gmbh Stülpfilterzentrifuge
ES2925083T3 (es) 2017-02-27 2022-10-13 Translate Bio Inc Métodos de purificación de ARN mensajero
CN107115980B (zh) * 2017-06-19 2022-12-02 宋英豪 立式离心机
KR20200096279A (ko) * 2017-12-19 2020-08-11 제로스 리미티드 처리 장치용 필터
JP2023544167A (ja) 2020-10-01 2023-10-20 トランスレイト バイオ， インコーポレイテッド メッセンジャーｒｎａの精製のための方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3430507A1 (de) * 1984-08-18 1986-02-27 Heinkel Industriezentrifugen GmbH + Co, 7120 Bietigheim-Bissingen Filterzentrifuge
DE3740411A1 (de) * 1987-11-28 1989-06-08 Heinkel Ind Zentrifugen Stuelpfilterzentrifuge
DE3916266C1 (fr) * 1989-05-19 1990-08-30 Heinkel Industriezentrifugen Gmbh + Co, 7120 Bietigheim-Bissingen, De
WO1992004982A1 (fr) * 1990-09-24 1992-04-02 Heinkel Industriezentrifugen Gmbh & Co. Centrifugeuse a filtre retourne

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
DE2709894C3 (de) * 1977-03-08 1982-01-07 Heinkel Industriezentrifugen GmbH & Co, 7120 Bietigheim-Bissingen Diskontinuierliche Filterzentrifuge
DE2710624C2 (de) * 1977-03-11 1985-09-19 Heinkel Industriezentrifugen GmbH + Co, 7120 Bietigheim-Bissingen Stülpfilterzentrifuge
DE3106022A1 (de) * 1981-02-19 1982-09-09 Heinkel Industriezentrifugen GmbH + Co, 7120 Bietigheim-Bissingen Filterzentrifuge
DE3520134C2 (de) * 1985-06-05 1994-02-24 Heinkel Ind Zentrifugen Stülpfilter-Zentrifuge
US4944874A (en) * 1986-12-12 1990-07-31 Kabushiki Kaisha Okawara Seisakusho Centrifugal separator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3430507A1 (de) * 1984-08-18 1986-02-27 Heinkel Industriezentrifugen GmbH + Co, 7120 Bietigheim-Bissingen Filterzentrifuge
DE3740411A1 (de) * 1987-11-28 1989-06-08 Heinkel Ind Zentrifugen Stuelpfilterzentrifuge
DE3916266C1 (fr) * 1989-05-19 1990-08-30 Heinkel Industriezentrifugen Gmbh + Co, 7120 Bietigheim-Bissingen, De
WO1992004982A1 (fr) * 1990-09-24 1992-04-02 Heinkel Industriezentrifugen Gmbh & Co. Centrifugeuse a filtre retourne

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705788C1 (de) * 1997-02-14 1998-07-30 Guenther Hultsch Diskontinuierlich arbeitende Filterzentrifuge

Also Published As

Publication number Publication date
US5472602A (en) 1995-12-05
DE4337618C1 (de) 1995-02-16

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