EP0257270B1 - Kontinuierlich arbeitende Zuckerzentrifuge - Google Patents

Kontinuierlich arbeitende Zuckerzentrifuge Download PDF

Info

Publication number
EP0257270B1
EP0257270B1 EP87110121A EP87110121A EP0257270B1 EP 0257270 B1 EP0257270 B1 EP 0257270B1 EP 87110121 A EP87110121 A EP 87110121A EP 87110121 A EP87110121 A EP 87110121A EP 0257270 B1 EP0257270 B1 EP 0257270B1
Authority
EP
European Patent Office
Prior art keywords
section
drum
approximately
angle
rotation axis
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.)
Expired - Lifetime
Application number
EP87110121A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0257270A3 (en
EP0257270A2 (de
Inventor
Helmut Schaper
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.)
BMA Braunschweigische Maschinenbauanstalt AG
Original Assignee
BMA Braunschweigische Maschinenbauanstalt 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 BMA Braunschweigische Maschinenbauanstalt AG filed Critical BMA Braunschweigische Maschinenbauanstalt AG
Publication of EP0257270A2 publication Critical patent/EP0257270A2/de
Publication of EP0257270A3 publication Critical patent/EP0257270A3/de
Application granted granted Critical
Publication of EP0257270B1 publication Critical patent/EP0257270B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B04B7/18—Rotary bowls formed or coated with sieving or filtering elements
    • 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

Definitions

  • the invention relates to a continuously operating sugar centrifuge with a drivable about a central axis of rotation, truncated cone-shaped from the bottom to the discharge edge, with a sieve drum that extends from the bottom of the drum or the upper band of a bottom-side acceleration pot for the purpose of filling material into the area of Throwing edge extends, the drum and / or the screen covering viewed in the direction of the central axis of rotation forms a different angle with it in sections and a device for supplying cover water is provided in the cross-sectional area of the drum.
  • Drums of the aforementioned type are difficult to produce in practice because it is very expensive to adapt the screen coverings to the paraboloidal shape of the drum or partial drums.
  • the layer thickness and the centrifuging time can also be influenced in order to adapt to changing filler mass qualities, since the transport of the filler mass on the screen of the centrifugal drum takes place under the action of the centrifugal force component and the pressure of the subsequent feed material in the direction of the cone generators.
  • the invention is based on the knowledge that the aforementioned force components acting on the filler mass change continuously during the transport of the filler mass, since the filler mass continuously reaches areas of larger diameter of the sieve drum during the transport until the discharge end and at a constant angle of the sieve covering in with respect to the central axis of rotation is subject to a constantly increasing discharge force, but on the other hand, due to the changing consistency of the filling compound as a result of the liquid separation and the abandonment of the covering liquids, it influences changes in the flow properties of the filling compound during its movement along the changing discharge force. In the case of centrifuges with a constant angle between the axis of rotation and the screen covering, only a very unfavorable compromise solution can be achieved, in which essentially the most uniform possible removal of the material from the drum is used.
  • the invention is based on the sugar centrifuges mentioned in the introduction, in which the drum and / or the sieve covering, viewed in the direction of the central axis of rotation, forms a different angle with it in sections.
  • these centrifuges are to be developed in such a way that the smallest possible number of sections of the sieve covering takes into account the influencing variables which act differently on the conveying path of the filling compound, and an even distribution of the filling compound in the individual sections with a layer thickness decreasing towards the discharge edge is achieved.
  • the above-mentioned design of the centrifuge takes into account that the liquid contained in the filling compound in the narrow cross-sectional area favors the flowability of the filling compound, so that relatively small discharge forces acting in the direction of the cone ends are sufficient to move the filling compound in this area in the direction of the ejection edge.
  • the liquid present as a syrup in the filling compound acts as a lubricant between the crystals. This sliding effect becomes less with increasing separation of the liquid, so that the fluidity is reduced in the central region of the centrifuge drum and for this reason the central region of the drum forms a larger angle with the axis of rotation than in the feed region of the filling compound.
  • a greater discharge force is exerted on the filling compound and the sliding of the filling compound is promoted even without a liquid film on the screen covering. In this way, the tendency of the filling compound layer to remain on the screen surface is counteracted.
  • the portion of the drum or screen covering adjacent to the discharge edge in turn forms a smaller angle with the axis of rotation than in the central region.
  • the increasing discharge force is taken into account in the area of the drum with the widest cross section, the lid water supply which is generally provided in this area also having to be taken into account.
  • the lubricity of the filling compound and the discharge force that is exerted on the filling compound depend on a number of parameters, such as consistency of the filling compound, crystal size, perforation of the sieve coating, centrifugal number of centrifuges and residence time of the filling compound in the centrifuge, none can be used for everyone Centrifuges valid absolute values for the angles between the sections of the centrifuge drum or the screen lining and the axis of rotation and also no absolute lengths for the individual sections can be specified.
  • the procedure can be that the angle of the central region is left and the subsequent regions pointing to the bottom and the discharge edge by about 3 to 7 ° be carried out steeper, in order to then achieve the above-mentioned conditions in the section pointing towards the discharge edge by appropriately setting the rotational speed, namely a uniform sliding of the layer to the discharge edge while maintaining the filler material supply and a persistence of the layer when the filler material supply is interrupted, but the cover water supply is maintained.
  • the first section extends approximately over 1/3 to 35%, the second section approximately 1/3 to 40% and the third section approximately 25% to 1/3 of the drum height.
  • the height of the third section that is to say the section adjacent to the bottom of the drum, can be kept somewhat lower than the other two sections.
  • the middle section has a greater length than the other two sections. It has proven to be expedient if the first section is approximately 35%, the second section approximately 40% and the third section approximately 25% of the drum height.
  • first section and the third section unite with the central axis of rotation Angle 25 ° and the second section form an angle of 30 ° .
  • the screening drum 1 is provided with a screen covering 2 which follows its course.
  • the drums 1 expand from the bottom 1a or from the upper edge of an acceleration plug 3 (FIG. 1) in the shape of a truncated cone and can be driven about a central axis of rotation 4 in a manner not shown.
  • the opening-side closure of the drums 1 is formed by a discharge edge 5, which is formed by a ring-like component.
  • both the sieve drum 1 and the sieve covering 2 are divided into three sections I, II and III, the individual sections I to III having approximately the same height h in the example shown.
  • Sections I and III show a matching angle ⁇ with respect to the central rotary ash 4 or the parallel to it, while section II has an angle ⁇ which is larger by about 5 ° in the example.
  • a cover water supply line 7 shown in dashed lines in the lower part of section I covers water on the screen surface 2 or the filling migrating on this screen surface from the bottom 1 a of the centrifuge drum to the discharge edge 5.
  • the angle a of section I is now selected so that at the operational speed of the centrifuge drum 1 and interrupted filling material supply to the bottom 1a or to the acceleration pot 3 and maintenance of the deck water supply through the supply line 7, the material layer remains on this sieve section 1 while it is at the filling material supply is set in motion again in order to move in the direction of the discharge edge while simultaneously reducing the layer thickness.
  • Section II runs with a greater inclination than section I with respect to the central axis of rotation 4, while section III in turn forms the same angle a with the central axis of rotation 4 as section 1.
  • the triple division of the centrifuge drum 1 or the sieve covering 2 enables simple manufacture of the sieve covering 2, the sieve covering also being divided into the sections mentioned and the individual sections being clamped to the Sieve drum 1 can be attached.

Landscapes

  • Centrifugal Separators (AREA)
EP87110121A 1986-08-22 1987-07-14 Kontinuierlich arbeitende Zuckerzentrifuge Expired - Lifetime EP0257270B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3628588 1986-08-22
DE19863628588 DE3628588A1 (de) 1986-08-22 1986-08-22 Kontinuierlich arbeitende zuckerzentrifuge

Publications (3)

Publication Number Publication Date
EP0257270A2 EP0257270A2 (de) 1988-03-02
EP0257270A3 EP0257270A3 (en) 1988-09-28
EP0257270B1 true EP0257270B1 (de) 1990-03-14

Family

ID=6307980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110121A Expired - Lifetime EP0257270B1 (de) 1986-08-22 1987-07-14 Kontinuierlich arbeitende Zuckerzentrifuge

Country Status (5)

Country Link
US (1) US4762570A (enrdf_load_stackoverflow)
EP (1) EP0257270B1 (enrdf_load_stackoverflow)
JP (1) JPS6354961A (enrdf_load_stackoverflow)
DE (2) DE3628588A1 (enrdf_load_stackoverflow)
IN (1) IN171105B (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4922625A (en) * 1988-03-03 1990-05-08 Process Equipment Company Sectionalized centrifugal drying basket/screen assembly
GB9919555D0 (en) * 1999-08-19 1999-10-20 Broadbent & Sons Ltd Thomas Improvements in continuous centrifuges
US6663774B2 (en) * 2000-10-16 2003-12-16 Weatherford/Lamb, Inc. Centrifuge screen
JP4227895B2 (ja) * 2001-10-18 2009-02-18 ダブリュディーティー（エンジニアズ） プロプライエタリー リミテッド 連続式遠心分離機
US10913015B2 (en) 2012-09-14 2021-02-09 Aqseptence Group, Inc. Variable geometry centrifugal basket
CN109351492A (zh) * 2018-09-03 2019-02-19 安徽屹翔滤材有限公司 一种便于更换筛网的离心机筛篮

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE100787C (enrdf_load_stackoverflow) *
GB918386A (en) * 1959-05-22 1963-02-13 Braunschweigische Maschb Ansta Improvements in continuous acting sieve centrifuges
DE1144192B (de) * 1960-10-14 1963-02-21 Braunschweigische Maschb Ansta Zentrifuge mit einer um eine lotrechte Achse umlaufenden, sich nach oben erweiternden Schleudertrommel zum Zentrifugieren viskoser Zuckermassen nach dem Duennschichtprinzip
DE2364260A1 (de) * 1973-12-22 1975-06-26 Krauss Maffei Ag Waschzentrifuge
DE7614228U1 (de) * 1976-05-05 1976-10-21 Braunschweigische Maschinenbauanstalt, 3300 Braunschweig Kontinuierlich arbeitende zuckerzentrifuge

Also Published As

Publication number Publication date
EP0257270A3 (en) 1988-09-28
DE3761878D1 (de) 1990-04-19
IN171105B (enrdf_load_stackoverflow) 1992-07-18
JPS6354961A (ja) 1988-03-09
EP0257270A2 (de) 1988-03-02
US4762570A (en) 1988-08-09
DE3628588A1 (de) 1988-03-03

Similar Documents

Publication Publication Date Title
EP0027630B1 (de) Zentrifuge zum Trennen von Feststoff-Flüssigkeitsgemischen
DE2344507C2 (de) Vollmantel-Schneckenzentrifuge
DE2930581A1 (de) Zentrifuge zum sortieren und trennen von feststoffen
DE1761600A1 (de) Vorrichtung zum Sichten von Faserstoffaufschwemmungen,insbesondere Zellstoff fuer Papiermuehlen
DE2207663C3 (de) Kontinuierlich arbeitende Zuckerzentrifuge
DE69018125T2 (de) Einstellbare Klappe für Rotationsfilter.
EP1337343B1 (de) Schnecke für eine vollmantel-schneckenzentrifuge und verfahren zur ölgewinnung mit einer vollmantel-schneckenzentrifuge
DE69612868T2 (de) Dekantierzentrifuge
EP0257270B1 (de) Kontinuierlich arbeitende Zuckerzentrifuge
DE2526866A1 (de) Beschickungsvorrichtung fuer kontinuierlich arbeitende trennzentrifugen
DE60124554T2 (de) Zentrifugalabscheider
DE3615224C3 (de) Kontinuierlich arbeitende Zuckerzentrifuge
DE2942451A1 (de) Zentrifuge zum trennen von feststoff-fluessigkeitsgemischen
DE2419355A1 (de) Zentrifuge
DD264741A5 (de) Verfahren und einrichtung zur reduzierung des druckes in einem fluessigkeitsgemisch
DE2306302C3 (de) Zentrifugenrotor mit um seine Achse angeordneten schaufelartig gekrümmten Siebflächen
EP0263285B1 (de) Kontinuierlich arbeitende Zuckerzentrifuge
EP1383607B1 (de) Vollmantel-schneckenzentrifuge und verfahren zur ölgewinnung mit einer vollmantel-schneckenzentrifuge
EP0455964B1 (de) Zentrifuge
DE68909662T2 (de) Konzentrationsanlage und Verfahren zum Abtrennen von Filtrat aus einer zu konzentrierenden Masse.
DE575315C (de) Mit Austragschnecke versehene Schleudertrommel
DE529610C (de) Kegelsiebschleuder zum Entwaessern von Kohle u. dgl. mit im Innern des Siebkegels ringfoermig angeordneten Ablenkrippen
DE7614228U1 (de) Kontinuierlich arbeitende zuckerzentrifuge
DE3810298A1 (de) Konfekttorte und verfahren und vorrichtung zu deren herstellung
DE1966553A1 (de) Verfahren zur herstellung faseriger blaetter

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: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19881121

17Q First examination report despatched

Effective date: 19890331

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3761878

Country of ref document: DE

Date of ref document: 19900419

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ITF It: translation for a ep patent filed
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960703

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960705

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970526

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970714

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970714

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050714