EP0551252A1 - Centrifugeuse a filtre retourne. - Google Patents

Centrifugeuse a filtre retourne.

Info

Publication number
EP0551252A1
EP0551252A1 EP90914387A EP90914387A EP0551252A1 EP 0551252 A1 EP0551252 A1 EP 0551252A1 EP 90914387 A EP90914387 A EP 90914387A EP 90914387 A EP90914387 A EP 90914387A EP 0551252 A1 EP0551252 A1 EP 0551252A1
Authority
EP
European Patent Office
Prior art keywords
drum
filling tube
filter centrifuge
inverting filter
filling
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.)
Granted
Application number
EP90914387A
Other languages
German (de)
English (en)
Other versions
EP0551252B1 (fr
Inventor
Hans Gerteis
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 Industriezentrifugen GmbH and Co
Original Assignee
Heinkel Industriezentrifugen GmbH and Co
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 Industriezentrifugen GmbH and Co filed Critical Heinkel Industriezentrifugen GmbH and Co
Publication of EP0551252A1 publication Critical patent/EP0551252A1/fr
Application granted granted Critical
Publication of EP0551252B1 publication Critical patent/EP0551252B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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 drum which is supported in a housing so as to be self-supporting and rotatable, has radial filtrate passages and can be pressurized with overpressure or underpressure, with a cover which closes the free end face of the drum, the drum and cover being relative to one another are axially displaceable, with a filling opening provided on the cover for the suspension to be filtered and with a filling tube which penetrates the filling opening in a sealed manner.
  • a combined rotary and sliding seal is arranged between the stationary filling tube and the filling opening of the lid, which allows working in the drum with pressure or vacuum.
  • the combined rotary and sliding seal which is arranged directly in the filling opening of the cover, has the disadvantage that, due to the inevitable sliding sealing elements, there is strong abrasion in the area of the drum, which can easily lead to undesired contamination of the filtered product . Since the drum rotates at a very high number of revolutions in the filtering operation, there is considerable abrasion which gives rise to considerable contamination.
  • the object is achieved in that the filling tube is rotatably mounted about its longitudinal axis and can be rotated together with the drum about this axis.
  • the filling pipe and drum rotate synchronously, all that is required is to provide a simple seal at the filling opening of the drum cover that is penetrated by the filling pipe, without any sliding sealing elements. In this way, abrasion which gives rise to impurities is completely avoided.
  • Figure 1 is a schematic partial sectional view of an inverting filter centrifuge
  • FIG. 2 shows an enlarged individual view in area A of FIGS. 1 and
  • FIG. 3 shows a schematic and enlarged partial sectional view of an embodiment of an inverting filter centrifuge which is modified compared to FIG.
  • the inverted filter centrifuge shown schematically in FIG. 1 comprises the entire machine tightly enclosing housing 1, in which a hollow shaft 3 is rotatably mounted in bearings 4 on a stationary machine frame 2.
  • a shaft 5 is arranged axially displaceably in the interior of the hollow shaft 3 and is connected to the hollow shaft 3 in a rotationally fixed manner. The shaft 5 thus rotates together with the hollow shaft 3, but is axially displaceable in the latter.
  • a pot-shaped centrifugal drum 7 with its base 8 is flanged to the end of the hollow shaft 3 on the left in FIG. 1 and protrudes beyond the bearing 4.
  • the drum 7 has radially extending passage openings 11 on its circular cylindrical side wall 9.
  • the drum 7 is open on its end face opposite the bottom 8.
  • On the flange-like opening edge 12 surrounding this open end face, one edge 14 of an essentially tubular filter cloth 15 is tightly clamped by means of a retaining ring 13.
  • the other edge 16 of the filter cloth 15 is accordingly tightly connected to a base piece 17 which is rigidly connected to the displaceable shaft which freely penetrates the base 8.
  • the filter cloth 15 covers the filtrate passages formed by the passage openings 11.
  • the drum 7 can also be axially displaceable relative to the then stationary cover 19 for the same purpose.
  • a filling tube 21 is arranged on the left side of the everting filter centrifuge in FIG. 1, which serves to feed a suspension to be broken down into its solid and liquid constituents into the centrifugal space of the drum 7.
  • the cover 19 of the drum 7 has a central filling opening 22, through which the free end of the filling tube 21 enters the drum interior, even when the cover 19 is closed.
  • the filling tube 21 is self-supporting in a stationary bearing block 23 which is fixedly connected to the housing 1, but is located outside this housing, by means of rotary bearings 24 and can be rotated about its longitudinal axis.
  • a drive motor 25 which is preferably designed as an electric motor, a belt 26 and a belt pulley 27 seated in a rotationally fixed manner on the filling tube 21, the filling tube 21 can be rotated about its longitudinal axis, which is aligned with the axis of rotation of the drum 7 .
  • Usual shaft seals 28 seal the outside of the filling tube 21 in the bearing block 23.
  • the bearing block 23 has an inlet opening 29 which can be connected to a pipeline and through which the suspension to be filtered can be introduced. The suspension passes directly from the filling opening 29 into the filling tube 21 and from there into the drum 7.
  • a bushing 31 which rotates together with the drum, is firmly inserted in the cover 19 of the drum 7 centrally and coaxially with the axis of rotation of the drum.
  • an annularly closed, elastic membrane 32 is arranged within a flat recess in the tube end.
  • a pneumatic or hydraulic pressure medium can be introduced via a line 33 running in the wall of the filling tube 21 between the membrane and the outer wall of the filling tube 21 in the region of the membrane.
  • the membrane 32 turns radially outward and lies all around against the inner wall of the bush 31, so that a perfect pressure-tight seal is produced between the filling tube 21 and the cover 19 of the drum 8.
  • the line 33 opens into an annular recess 34 in the bearing block 23, into which the pressure medium mentioned for the membrane 32 can be introduced via a channel 35.
  • the membrane 32 is in the upturned state shown in which it seals against the socket 31. 2 shows the same state of the membrane 32 at the top. In FIG. 2 below the membrane is shown in its relaxed, depressurized state, in which, due to its elasticity, it is pulled back smoothly into the above-mentioned recess at the end of the tube 21, so that between the sleeve 31 and the membrane 32 all around there remains a distance which allows the cover 19 to be freely moved over the filling tube 21.
  • a further recess 36 with an outlet channel 37 is provided between the two shaft seals 28 in the bearing block 23. If necessary, suspension which has reached the shaft seal 28 on the left in FIG. 1 during the filling process can be discharged into the open via this recess 36 and this channel 37.
  • the filling tube 21 is penetrated over its entire length by a pipeline 38 which is rigidly connected to the bearing block 23, that is to say remains stationary during the rotation of the filling tube 21.
  • the pipeline 38 can be connected to the bearing block 23 with an overpressure or underpressure source, so that an overpressure or underpressure can be generated inside the closed drum 7, against which, as already stated, the one formed by the bushing 31 and the membrane 32 Seal seals. Since the filling tube 21 can be put into circulation synchronously with the drum 7 because of its rotary bearing in the bearing block 23, there is no friction between the filling tube 21 and the drum 7 in the area of the filling opening 22.
  • the bushing 31 and the membrane 32 thus also rotate synchronously There is no grinding abrasion there which could lead to contamination of the suspension in the drum 7. At most, abrasion could occur to a small extent on the shaft seals 28, but it can be rinsed out there via the opening 36 and the channel 37 without getting into the drum 7.
  • the inverting filter centrifuge described first assumes the position shown in FIG. 1, in which a seal between the cover 19 and the filling tube 21 is produced via the membrane 32 to which pressure medium is applied.
  • the displaceable shaft 5 is retracted into the hollow shaft 3, as a result of which the shaft 5 connected bottom piece 17 is in the vicinity of the bottom of the centrifugal drum 7 and the filter cloth 15 is inserted into the drum such that it lies inside.
  • the centrifugal chamber cover 19 has placed itself tightly on the opening edge of the drum 7.
  • suspension to be filtered is introduced into the centrifugal space of the drum via the filler pipe 21.
  • the drum is set into relatively rapid rotation.
  • the liquid components of the suspension pass through the openings 11 of the drum 7 and are derived from a baffle plate 40.
  • the solid particles of the suspension are stopped by the filter cloth 15 in the form of the usual filter cake.
  • an overpressure or underpressure can be generated in the interior of the drum 7 via the pipeline 38, against which the seal formed by the bushing 31 and the membrane 32 seals.
  • shaft 5 turns to the left with drum 7 rotating relatively slowly and after switching off the pressure or vacuum source connected to line 38 and after opening the sealing closure formed by bushing 31 and membrane 32 (see FIG. 2 below) moved, whereby the filter cloth 15, as in Figure 1 shown in broken lines, turned inside out and the solid particles adhering to it are thrown outwards into the housing 1.
  • the filling tube 21 penetrates freely past the relaxed membrane 32 into the bore 39 of the shaft 5.
  • the inverting filter centrifuge is brought back into its closed operating position according to FIG. 1 by pulling back the shaft 5, the filter cloth 15 turning back in the opposite direction.
  • the centrifuge can be operated with the centrifugal drum 7 rotating continuously, the pressure conditions in the drum 7 being able to be set as desired.
  • the filling tube 21 can be brought to the same speed as the drum before the sealing seal formed by the bushing 31 and the membrane 32 is closed, so that even during the Closing this closure, which leads to a rotationally fixed connection between the filler tube 21 and the drum 7, no undesired abrasion can occur.
  • the drive of the filler pipe 21 shown via the motor 25 has only symbolic characters. In practice, the synchronous drive of filler tube 21 and drum 7 is realized with known electrical or mechanical means, for example using frequency-controlled motors with the same setpoint value.
  • the membrane forming an element of the sealing closure of the filling opening 22 is firmly connected to the filling tube 21.
  • a membrane that can be loaded with a pressure medium could also be permanently connected to the cover 19 of the drum within the filling opening 22, so that it presses concentrically all around the outer wall of the filling tube 21 when it is loaded with pressure medium.
  • the pressure medium acting on the membrane must be supplied via the printing drum 7. This is indicated in FIG. 1 by a channel 41 shown in broken lines, which runs through the shaft 5, the base piece 17, the stud bolt 18 and the cover 19 towards the membrane.
  • the pipeline 38 serving to generate an overpressure or underpressure in the interior of the filling tube 21 can be replaced by a pipeline 42 which is formed in the shaft 5 and is also indicated by dashed lines in FIG.
  • FIG. 3 shows a bearing block 43 of a modified one Embodiment of an inverting filter centrifuge, wherein the bearing block 43 corresponds to the bearing block 23 in Figure 1. Parts that are identical to one another are designated by the same reference numerals in FIGS. 1 and 3.
  • the filling tube 44 has an end flange 45 on the rear.
  • An annular membrane seal 46 can be sealingly applied to the free end surface of the flange 45 if this membrane seal is acted upon on the rear side by a pressure medium formed in the bearing block 43.
  • the membrane seal 46 is in turn also arranged in a corresponding annular recess 48 of the bearing block 43 which is open towards the end flange 45.
  • a filling pipe 44 which rotates continuously with the drum 7 about its longitudinal axis can be unsuitable if, in the case of particularly sensitive suspensions, their solid particles are already on the wall during the filling of the suspension into the drum 7 of the circumferential filling tube 44 can settle. In such; In some cases, it is favorable to shut down the filling pipe 44 during the filling process, which is readily possible if the drum 7 continues to rotate if the seal formed by the bushing 31 and the membrane 32 is opened in the manner described above. When the filling pipe 44 is stationary, however, the elastic membrane seal 46 can be brought into abutment against the end flange 45 without further notice. In this way it is reliably prevented filled suspension reaches the area of the shaft seal 28.
  • the membrane seal 46 is in the open position, that is to say detached from the end flange 45 of the filling tube tem condition, so that no undesirable abrasion between the membrane seal 46 and 44 fill tube can occur.
  • the seals are designed as membrane seals. It is obvious that such membrane seals can also be replaced by other closure elements in the form of pneumatically or hydraulically actuated elastic pinch seals, for example also in the form of a tube.

Landscapes

  • Centrifugal Separators (AREA)
  • Liquid Crystal Substances (AREA)
  • Gyroscopes (AREA)

Abstract

Une centrifugeuse à filtre retourné comprend un panier (7) monté rotatif en porte-à-faux dans un boîtier (1), ayant des passages radiaux (11) pour le filtrat, et sur lequel peut s'exercer une surpression ou une pression négative, ainsi qu'un couvercle (19) qui ferme la face frontale libre du panier. Le panier et le couvercle sont axialement mobiles l'un par rapport à l'autre. Un orifice d'introduction (22) de la suspension à filtrer est ménagé dans le couvercle et un tuyau de remplissage (21) traverse l'orifice d'introduction de manière étanche. Le tuyau de remplissage (21) est monté rotatif autour de son axe longitudinal et peut être mis en rotation avec le panier (7) autour de cet axe.
EP90914387A 1990-09-24 1990-09-24 Centrifugeuse a filtre retourne Expired - Lifetime EP0551252B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1990/001617 WO1992004982A1 (fr) 1990-09-24 1990-09-24 Centrifugeuse a filtre retourne

Publications (2)

Publication Number Publication Date
EP0551252A1 true EP0551252A1 (fr) 1993-07-21
EP0551252B1 EP0551252B1 (fr) 1995-06-07

Family

ID=8165521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90914387A Expired - Lifetime EP0551252B1 (fr) 1990-09-24 1990-09-24 Centrifugeuse a filtre retourne

Country Status (11)

Country Link
US (1) US5304306A (fr)
EP (1) EP0551252B1 (fr)
JP (1) JP3174320B2 (fr)
KR (1) KR0150415B1 (fr)
CN (1) CN1036839C (fr)
AT (1) ATE123425T1 (fr)
DE (1) DE59009219D1 (fr)
DK (1) DK0551252T3 (fr)
ES (1) ES2073038T3 (fr)
RU (1) RU2096093C1 (fr)
WO (1) WO1992004982A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7168571B2 (en) * 2003-03-19 2007-01-30 Johannes Gerteis Inverting-filter centrifuge

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2081708C1 (ru) * 1991-05-04 1997-06-20 Хейнкель Индустрицентрифуген ГмбХ унд Ко Центрифуга с выворачиваемым фильтром
DE4230261A1 (de) * 1991-10-01 1993-04-08 Krauss Maffei Ag Diskontinuierlich arbeitende filterzentrifuge
DE4337618C1 (de) * 1993-11-04 1995-02-16 Krauss Maffei Ag Stülpfilterzentrifuge (Trommelraumabdichtung)
DE4342471C1 (de) * 1993-12-13 1995-05-04 Krauss Maffei Ag Filterzentrifuge
DE19525567A1 (de) * 1995-07-13 1997-01-16 Krauss Maffei Ag Stülpfilterzentrifuge
DE19705788C1 (de) * 1997-02-14 1998-07-30 Guenther Hultsch Diskontinuierlich arbeitende Filterzentrifuge
DE19732006C1 (de) * 1997-07-25 1998-11-19 Heinkel Ind Zentrifugen Vorrichtung zur Durchführung einer Gewichtsmessung bei Zentrifugen
DE10115381A1 (de) * 2001-03-28 2002-10-24 Heinkel Ag Stülpfilterzentrifuge
DE102011010072B4 (de) 2011-02-01 2013-08-22 Contecma C. S. Gmbh Stülpfilterzentrifuge
CN102357433A (zh) * 2011-09-08 2012-02-22 安徽普源分离机械制造有限公司 卧式全自动拉袋离心机
CN105664562A (zh) * 2016-02-01 2016-06-15 苏州拓维工程装备有限公司 转鼓式压滤机
JP2021506576A (ja) * 2017-12-19 2021-02-22 ゼロス リミテッド 処理装置のためのろ過器
CN111686944A (zh) * 2020-06-24 2020-09-22 台州职业技术学院 一种fwz型翻袋式离心机、控制方法及应用

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1205461B (de) * 1962-06-30 1965-11-18 Krauss Maffei Ag Schubzentrifuge
DE3740411C2 (de) * 1987-11-28 1996-11-14 Heinkel Ind Zentrifugen Stülpfilterzentrifuge
DE3916266C1 (fr) * 1989-05-19 1990-08-30 Heinkel Industriezentrifugen Gmbh + Co, 7120 Bietigheim-Bissingen, De
US5004540A (en) * 1989-12-01 1991-04-02 Ketema Process Equipment Division Invertible filter-type centrifuge with improved bearing and seal assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9204982A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7168571B2 (en) * 2003-03-19 2007-01-30 Johannes Gerteis Inverting-filter centrifuge

Also Published As

Publication number Publication date
RU2096093C1 (ru) 1997-11-20
ES2073038T3 (es) 1995-08-01
JP3174320B2 (ja) 2001-06-11
WO1992004982A1 (fr) 1992-04-02
EP0551252B1 (fr) 1995-06-07
CN1036839C (zh) 1997-12-31
JPH06502339A (ja) 1994-03-17
US5304306A (en) 1994-04-19
ATE123425T1 (de) 1995-06-15
DE59009219D1 (de) 1995-07-13
CN1060232A (zh) 1992-04-15
DK0551252T3 (da) 1995-08-21
KR0150415B1 (ko) 1998-10-15
KR930702077A (ko) 1993-09-08

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