EP1057533A1 - Centrifugeuse - Google Patents

Centrifugeuse Download PDF

Info

Publication number
EP1057533A1
EP1057533A1 EP99810460A EP99810460A EP1057533A1 EP 1057533 A1 EP1057533 A1 EP 1057533A1 EP 99810460 A EP99810460 A EP 99810460A EP 99810460 A EP99810460 A EP 99810460A EP 1057533 A1 EP1057533 A1 EP 1057533A1
Authority
EP
European Patent Office
Prior art keywords
drum
helix
centrifuge according
flank
axial
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Withdrawn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
EP99810460A
Other languages
German (de)
English (en)
Inventor
Werner Prof. Dr. Stahl
Harald Dr. Reinach
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.)
Ferrum AG
Original Assignee
Ferrum 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 Ferrum AG filed Critical Ferrum AG
Priority to EP99810460A priority Critical patent/EP1057533A1/fr
Priority to AU34147/00A priority patent/AU3414700A/en
Priority to JP2000621076A priority patent/JP4365043B2/ja
Priority to US09/979,478 priority patent/US6547972B1/en
Priority to PCT/CH2000/000198 priority patent/WO2000072974A1/fr
Priority to EP00912324A priority patent/EP1181103B1/fr
Priority to DE50005694T priority patent/DE50005694D1/de
Publication of EP1057533A1 publication Critical patent/EP1057533A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B04B3/04—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 a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • 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

Definitions

  • the invention relates to a centrifuge with a rotating drum and with an ejection element rotating with the drum to open one cakes of solids separated from the inside of the drum in axial Towards the drum.
  • the filter cake one A sedimentation or filtration centrifuge can be a mayonnaise-like, a rheological pasteuse or a mass in the form of a saturated or unsaturated aggregate with a Mohr fracture limit curve.
  • inverting filter centrifuge from Heinkel GmbH, D-74303 Bietigheim-Bissingen, Germany, with which batch Filling, washing, dry spinning and emptying in one stroke are possible over the entire length of the drum.
  • inverting filter uses a movable cloth, which carries a considerable risk, that cloth rubbing gets into the product.
  • a quasi-continuously working Double-shear centrifuge is shown in the patent EP 0 635 309, in which an intermittent moving floor is arranged in a sieve drum and mutually a ring created in his "wake" Solid material moved axially outwards by a stroke length.
  • a disadvantage the pusher centrifuge is that the maximum occurring Thrust pressure, which occurs over a saturated pile, when fresh filter cake on the moving floor is largest.
  • the object of the present invention is to show centrifuges which are different products are customizable and different modes of operation allow.
  • This task is carried out with the marks of the independent Claim 1 solved by the ejection element in the form of an ejection surface has a helical spiral, and in the spiral and drum are kinematically connected such that a reference point on the circumference of the Turns a saw tooth line relative to the drum executes a first flank of the saw teeth with their slope approximates the pitch of the helix while a second flank the saw teeth corresponds to an approximately axial ejection movement.
  • This arrangement has the advantage of being small but repetitive Stroke in the axial direction because of the axial expansion of the helix over the whole length of the drum a safe, from the product characteristics largely independent ejection of the solid cake takes place.
  • there are structural advantages because there is only a small stroke for the Ejection movement in the axial direction is necessary. Because the Reverse movement of the helix by combining rotation and stroke relative to the drum in their own track, the Velocities when passing through the first and second flanks, i.e. the Reverse and feed movement can be selected is a simple one Adaptation to different properties of the solid cake possible.
  • Simple controls for such a centrifuge with a spiral can also do so look like a continuous, slow rotation between Spiral and drum is generated.
  • the axial movement of the helix is included generated a hydraulic piston that corresponds to the Tangential speed of the spiral is a speed component in has an axial direction to a suitably composed Velocity in the direction of the first edge of a given one To form sawtooth.
  • Velocity in the direction of the first edge of a given one To form sawtooth.
  • the figures show a centrifuge with a rotating drum 1 and one with the drum rotating ejection element 2 to one on the Inside the drum 1 set cake 3 in the axial direction 4 to bump.
  • the ejection element 2 has a helix 5 which overlaps the length of the drum extends.
  • Helix 5 and drum 1 are of this type kinematically connected that a reference point A on the circumference of the helix a rotational movement in the form of a sawtooth line 6, 8 relative to the drum executes, wherein a first flank 7 of the saw teeth 8 with its slope ⁇ approximately corresponds to the pitch ⁇ of the helix, while a second Flank 9 of the saw teeth 8 an approximately axial ejection movement corresponds.
  • a pusher centrifuge is shown, the ejection element 2 in shape a helix 5 rests on the inside of a cylindrical drum 1.
  • the starting product is in the form of a suspension via a feed pipe 32 introduced into the rotating drum 1 and via the hollow shaft 20 executed ejection element via openings 22 in a filling zone 21 dispensed the drum and centrifuged.
  • the drum has one sieve-shaped surface on which the solids content to a Cake 3 settles.
  • the helix rotates and rotates relative to the drum Stroke movement, such that a point A on the circumference of the helix Sawtooth line 6 describes (see Fig. 10).
  • a first edge 7 of a Sawtooth 8 is achieved in that the reverse stroke and the rotation are linked together relative to the drum in such a way that the helix is in moved backwards in their own track. Maybe against the back offset cake 3 is cut by the helix 5.
  • Rotational movement between coil 5 and drum 1 are interrupted and be waited until the resulting cake 3 the conditions for an ejection stroke in the axial direction is sufficient.
  • the stroke of the helix 5 in axial direction takes only a fraction of their total axial direction Length, since it extends until it exits the drum 1 in order to to ensure the axial transport of the cake.
  • a double helix 52 is in the fill zone along the length of the Axialhubes up to a small sector 53 at its beginning by one Gap 54 of a few millimeters, for example from 5 to 20 mm set back from the drum shell 16.
  • the cake 3 gradually becomes the exit of the open drum 1 pushed and with each step is a ring piece of the cake thrown off
  • a housing 33 catches in two separate zones thrown off liquid and the thrown off solid parts, which emerge separately from a drain 35 and a discharge opening 36.
  • Drum 1 and helix 5 can be rotated relative to one another in a bearing block 31 stored and are via a main drive motor 28 by means of belt drive 29 driven.
  • a base plate 30, which is applied to a foundation 34 supports bearing block 31, housing 33 and a sawtooth converter 41, which is the relative sawtooth movement between helix and drum generated.
  • a controller 27 coordinates the operating data of the system and controls the sawtooth converter 41.
  • the speed at which the flanks 7, 9 of a sawtooth can be traversed is adjustable.
  • the reversal points for the axial stroke pauses of any length in the relative Rotation, i.e. Drum and helix turn in the same direction quickly to match the timing of the ejection movement second flank 9 of a sawtooth the most favorable moment in the process adapt.
  • drum 1 and helix 5 are bilateral through bearings 37 supported, a shaft stub of the helix as a feed pipe 32 is executed.
  • the actual coil 5 is supported on a hollow shaft 20, to the product through openings 22 into the actual filling zone 21 bring.
  • the inside of the cylindrical drum is also included a finer sieve 17 occupied.
  • the drum 1 is in two parts composed and has on the ejection side fling window 40, through the solid parts into the housing.
  • the spiral itself is executed in two courses.
  • the sieve 17 does not extend over the entire length 13 of the helix 5.
  • two further zones 23, 24 adjacent by means of which further reagents such as e.g. Washing liquids can be introduced via pipes 38, 39.
  • further reagents such as e.g. Washing liquids can be introduced via pipes 38, 39.
  • drain openings 15 at the front of the drum 1 drain openings 15 are attached those with adjustable covers the level for the liquid level can be set in the rotating drum.
  • the helix 1 is also designed as a hollow shaft 20.
  • the actual coil is on both sides through side walls 14 to the drum 1 sealed.
  • a gap is created on the outlet side which the solids are thrown off, i.e. a point A on the circumference the spiral moves with the cake on the second flank 9 one Sawtooth in the direction of ejection and then to close together with the moving side wall 14 on the first flank 7 of the Sawtooth back to a starting position.
  • With relative thin-bodied products can also close relatively quickly be made and a longer dwell time in the rear Initial positions are provided until the consistency for the next small ejection movement is big enough.
  • the advantage here is that there is only a short one per face Cake lengths must be shifted in the axial direction, i.e. the The accumulation of the shear forces in the cake becomes smaller.
  • This arrangement compared to a batch filter centrifuge the advantage that continuous supply of the product is possible and that the Dimensions are smaller because of the small axial movements.
  • the Close the drum 1 with the side wall 14 on the ejection side also has the advantage that a coaxial in the feed pipe 32 attached pipe 63 for increasing the pressure in the drum compressed air can be introduced.
  • the helix 5 is designed as a band screw 19, which is attached to the hollow shaft 20 via supports 42.
  • the spiral is two-course, i.e. two ribbon screws are offset by 180 ° to each other arranged.
  • the ribbon screw generally leaves a better distribution of the Suspension too.
  • the inside of the drum 1 is stepped.
  • the bigger one Diameter is on the discharge side.
  • the helix 5 makes in one point A radially jump outwards.
  • the rear starting position for a Ejection on the second flank 9 of a sawtooth is determined in such a way that point A cannot enter the shoulder at the jump in diameter.
  • the filter cake moves over the Jump in diameter and is broken open again. It can be beneficial be, the ejection movement 9 so slow for certain products to set that a shift occurs at the jump in diameter.
  • the helix is turned back on the first flank 7 of the sawtooth in FIG the original axial starting position while tangential certain angle of rotation was traversed.
  • the helix 5 consists of a cutting edge 43 which extends backwards into the Diameter jump of the drum cuts the layered cake.
  • the angle of rotation is determined by the choice of an appropriate axial stroke set so that it does not correspond to an integer fraction of 360 °, so with advancing time through all areas of the shoulder in the drum 1 this cutting edge can be cut free once. The effect of the Cut to the back of the drum.
  • a conical closes for drum 1 and helix 5 Section 18 to a cylindrical part at the filling zone 21.
  • the ejection on the second flank 9 of a sawtooth increases the play of a point A in the conical section 18 of the Drum 1.
  • the one with the return angle of rotation reached is not an integer fraction of 360 °, so all Surfaces in the conical section once enjoy the little play come at the beginning of the ejection movement and therefore not permanent Deposits are created.
  • the drum 1 is cylindrical with its outer surface 16 and supported on both sides with bearings 37 and made of two bodies assembled to be able to insert the inner parts.
  • the Product feed (not shown here) is through a hollow Stub shaft of the helix 5.
  • Adjustable outflow openings 15 place it Level of liquid solid.
  • the outer surface 16 is only towards the exit Sieve 17 executed.
  • the radial height is reduced in this sieving area the helix with a cone as the enveloping surface.
  • the cake is through Centrifugal window 40 released on the exit side.
  • 10 to 13 are different types of sawtooth lines 6 shown, whose shape depends on the type of drive for the relative movement, i.e. depends on the type of sawtooth converter.
  • the Slope ⁇ of the first flank 7 of a sawtooth through the slope ⁇ of the Helix is specified, can with a predetermined constant rotation only the ejection speed between the helix and drum the second flank 9 of a sawtooth can be reduced by one more or less wide trench as in FIG. 13.
  • the helix 5 is a double helix with axial holes 56 formed to form a filtering screw 57, which additionally axially emerging liquid collects and through the sieve 17 to the outside delivers.
  • the filling zone with openings 22 is opposite to that Outlet openings 40 attached to the discharge side.
  • Fig. 15 is a hydraulic piston 25, a rotary piston 58, the 16 can be seen, so with a freewheel 59 combined that a support of the helix on the filter cake is sufficient to the Rotary piston after a reverse rotation corresponding to the second flank a sawtooth back to its original position and then an ejection movement in with a hydraulic piston 25 axial direction.
  • the actual target position of the helix with your Axis 5a to axis 1a of the drum is controlled by a controller (not here shown), while the actual position with respect to the relative rotation between the coil and drum is queried by a sensor 60 and the axial actual position of the helix is queried by a sensor 61.
  • the Rotary piston 58 is driven with oil via supply lines 58a, 58b perform a relative rotational movement to the drum, which at Reverse rotation of the helix through the locked freewheel 59 on axis 5a the helix 5 is transmitted while resetting the rotary lobe 58 in its original position without turning the helix by releasing it of the freewheel 59 takes place.
  • the ejection piston 25 is via oil lines 25a, 25b controlled and concerned the axial adjustment between the helical axis 5a and Drum axis 1a.
  • the helical shaft 5a is anchored along a stationary path hydraulic piston 25 axially reciprocated.
  • the main drive for the Drum shaft 1a is provided as in Fig. 1.
  • the movement of the Drum shaft 1a is removed via a wheel set 48 and via a viscous clutch 46 and a second wheel set 47 on the helical shaft 5a transfer.
  • the slip in the clutch is controlled so that both shafts 5a, 1a turn equally fast to take breaks for depositing the product and for rapid ejection on the second flank 9 of a sawtooth generate while turning backwards on the first flank 7 of Slip, which can be measured via the sensors 60a, 60b, is changed such that the helix turns backwards in its own track.
  • the wheelsets 48, 47 must be graded so that the spiral shaft 5a when the Slip would rotate faster than the drum shaft 1a, otherwise none sufficient torque to support the relative rotation would arise in the viscous coupling 53.
  • the coupling in the coupling 53 can be done with an electrically polarizable liquid as they are known from electro-rheology and for example are sold by Bayer, Leverkusen.
  • the fact that the Wheelset 47 for the helical shaft 5a has straight teeth, can be move them axially. The axial movement is determined by a sensor 61 monitored and in the controller 27 by comparison with a setpoint input 49 for rotation and axial movement with the measurements of the sensors 60a, 60b coordinated for control along a sawtooth line. That means the Controller 27 also includes a hydraulic part with which the hydraulic piston 25 is controlled.
  • the invention is not limited to the previously listed embodiments of Spiral coils limited. So the used ones Helical spirals with interruptions to a To form "segmental screw" or along its length with different Sheet thickness must be executed. It is also possible to increase the pitch of the snail easy to change in certain areas or using the snail To provide closing elements for drum sealing.

Landscapes

  • Centrifugal Separators (AREA)
EP99810460A 1999-05-27 1999-05-27 Centrifugeuse Withdrawn EP1057533A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP99810460A EP1057533A1 (fr) 1999-05-27 1999-05-27 Centrifugeuse
AU34147/00A AU3414700A (en) 1999-05-27 2000-04-05 Centrifuge
JP2000621076A JP4365043B2 (ja) 1999-05-27 2000-04-05 遠心機
US09/979,478 US6547972B1 (en) 1999-05-27 2000-04-05 Centrifuge with ejector for solids
PCT/CH2000/000198 WO2000072974A1 (fr) 1999-05-27 2000-04-05 Centrifugeuse
EP00912324A EP1181103B1 (fr) 1999-05-27 2000-04-05 Centrifugeuse
DE50005694T DE50005694D1 (de) 1999-05-27 2000-04-05 Zentrifuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99810460A EP1057533A1 (fr) 1999-05-27 1999-05-27 Centrifugeuse

Publications (1)

Publication Number Publication Date
EP1057533A1 true EP1057533A1 (fr) 2000-12-06

Family

ID=8242849

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99810460A Withdrawn EP1057533A1 (fr) 1999-05-27 1999-05-27 Centrifugeuse
EP00912324A Expired - Lifetime EP1181103B1 (fr) 1999-05-27 2000-04-05 Centrifugeuse

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP00912324A Expired - Lifetime EP1181103B1 (fr) 1999-05-27 2000-04-05 Centrifugeuse

Country Status (6)

Country Link
US (1) US6547972B1 (fr)
EP (2) EP1057533A1 (fr)
JP (1) JP4365043B2 (fr)
AU (1) AU3414700A (fr)
DE (1) DE50005694D1 (fr)
WO (1) WO2000072974A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004085605A1 (fr) * 2003-03-27 2004-10-07 Shima System Co., Ltd. Sake concentre, procede de realisation associe, appareil centrifuge et appareil pour concentrer le sake ou similaire
ES2619155T3 (es) * 2005-11-18 2017-06-23 Ferrum Ag Cartucho de centrífuga
DE102008048091B4 (de) * 2008-09-19 2010-07-08 Börger GmbH Flüssigkeitsabscheider
DK201870747A1 (en) * 2018-11-14 2020-06-23 Bollfilter Nordic Aps Filter candle and method for operating such filter candle
KR102504657B1 (ko) * 2019-11-18 2023-02-27 주식회사 엘지화학 가압 원심 탈수기

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH452441A (de) * 1966-08-23 1968-05-31 Escher Wyss Ag Schubzentrifuge
DE1960015A1 (de) * 1969-01-22 1970-09-17 Ind Forschungszentrum Chemiean Kontinuierliche Filtrierzentrifuge
WO1982001668A1 (fr) * 1980-11-12 1982-05-27 Georg Schilp Centrifugeuse avec fond deplacable pour l'evacuation de la matiere solide
SU1011270A1 (ru) * 1981-03-24 1983-04-15 Предприятие П/Я В-2262 Центрифуга
DE3236428A1 (de) * 1982-09-06 1983-07-21 Escher Wyss Gmbh, 7980 Ravensburg Doppel-schubzentrifuge

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2718309A (en) * 1951-09-13 1955-09-20 Conveyor Company Inc Centrifugal dehydrator
US2858942A (en) * 1954-05-21 1958-11-04 Union Carbide Corp Centrifugal separator
US4366951A (en) * 1982-02-16 1983-01-04 Belsky Valentin I Apparatus for refining metal melts from insuluble impurities
EP0328548A1 (fr) * 1986-11-03 1989-08-23 Rotosieve Ab Agencement d'amenee et de sortie pour tambours rotatifs de filtrage
JPH0642931B2 (ja) * 1990-08-16 1994-06-08 孝一 荒井 スクレーパ濾過装置
US5653879A (en) * 1996-02-16 1997-08-05 Schroeder; Vern Liquid and solid separator
JPH11216313A (ja) * 1998-02-03 1999-08-10 Ishikawajima Harima Heavy Ind Co Ltd 脱水濃縮装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH452441A (de) * 1966-08-23 1968-05-31 Escher Wyss Ag Schubzentrifuge
DE1960015A1 (de) * 1969-01-22 1970-09-17 Ind Forschungszentrum Chemiean Kontinuierliche Filtrierzentrifuge
WO1982001668A1 (fr) * 1980-11-12 1982-05-27 Georg Schilp Centrifugeuse avec fond deplacable pour l'evacuation de la matiere solide
SU1011270A1 (ru) * 1981-03-24 1983-04-15 Предприятие П/Я В-2262 Центрифуга
DE3236428A1 (de) * 1982-09-06 1983-07-21 Escher Wyss Gmbh, 7980 Ravensburg Doppel-schubzentrifuge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8403, Derwent World Patents Index; Class J01, AN 84-047282, XP002118317 *

Also Published As

Publication number Publication date
AU3414700A (en) 2000-12-18
EP1181103A1 (fr) 2002-02-27
US6547972B1 (en) 2003-04-15
DE50005694D1 (de) 2004-04-22
WO2000072974A1 (fr) 2000-12-07
JP4365043B2 (ja) 2009-11-18
EP1181103B1 (fr) 2004-03-17
JP2003530203A (ja) 2003-10-14

Similar Documents

Publication Publication Date Title
EP0027630B1 (fr) Centrifugeuse pour la séparation de mélanges solide-liquide
DE69315109T2 (de) Schneckenzentrifuge mit unterbrochenen Schneckenwendeln im konischen Austragsmantelteil
DE2344507C2 (de) Vollmantel-Schneckenzentrifuge
DE69706716T2 (de) Dekantierzentrifuge und zugehöriges Verfahren zum Erzeugen von Feststoff mit reduziertem Feuchtigkeitsgehalt und hohem Durchsatz
DE3027020A1 (de) Vollmantelzentrifuge zum stoffaustausch zwischen fluessigkeiten
DE3318793A1 (de) Vorrichtung zum entfeuchten von schlamm
DE1925001A1 (de) Zentrifuge
DE1401564B1 (de) Stueckeisherstellungsmaschine
DE3224204A1 (de) Zentrifuge
EP1468744B1 (fr) Centrifugeuse à poussoir avec cone rotatif pour pre-accélerer le mélange
EP0138188A2 (fr) Filtre sous pression
EP1181103B1 (fr) Centrifugeuse
DE3122131A1 (de) Vorrichtung zur entnahme und entwaesserung von feststoffen aus fluessigkeiten, insbesondere aus gerinnen von klaeranlagen
DE1553134C3 (de) Schneckenfoerderer
DE3941505C1 (fr)
EP1958698B1 (fr) Procédé de fonctionnement d'une centrifugeuse
AT398282B (de) Zentrifuge
DE2942451A1 (de) Zentrifuge zum trennen von feststoff-fluessigkeitsgemischen
DE1632291B1 (de) Kontinuierlich arbeitende Siebzentrifuge
WO2002011853A1 (fr) Dispositif d'extraction permettant l'extraction de liquide a partir de corps solides, et son utilisation
DE4221315B4 (de) Conche
CH689798A5 (de) Rührwerksmühle.
DE3042674A1 (de) Schubzentrifuge
DE2305326C3 (de) Siebzentrifuge, insbesondere Zuckerzentrifuge
DE20211101U1 (de) Schneckenzentrifuge

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20010607

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566