EP0887109A2 - Inserts pour panier d'une centrifuge à fonctionnement continu - Google Patents

Inserts pour panier d'une centrifuge à fonctionnement continu Download PDF

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Publication number
EP0887109A2
EP0887109A2 EP98111767A EP98111767A EP0887109A2 EP 0887109 A2 EP0887109 A2 EP 0887109A2 EP 98111767 A EP98111767 A EP 98111767A EP 98111767 A EP98111767 A EP 98111767A EP 0887109 A2 EP0887109 A2 EP 0887109A2
Authority
EP
European Patent Office
Prior art keywords
basket
inclination
angle
continuous centrifuge
sieve
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Withdrawn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
EP98111767A
Other languages
German (de)
English (en)
Other versions
EP0887109A3 (fr
Inventor
Eckhard Bartsch
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 EP0887109A2 publication Critical patent/EP0887109A2/fr
Publication of EP0887109A3 publication Critical patent/EP0887109A3/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Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the invention relates to a continuous centrifuge with a product distributor pot, Distribution bell and drum, in which a pre-separation stage and a main separation stage are provided with different angles of inclination.
  • Continuous centrifuges are known. For example, they are used in the sugar industry used for the separation of crystal suspensions. Within the Centrifuges are provided with drums equipped with sieves. By the sieves are supposed to get the liquid radially outwards while the solid Components on the wall can be transported diagonally upwards.
  • the FR-PS 13 55 763 proposes, alternating several times and first of all a dry-spin area in stages, then a washing area, then again a spin dryer area and to follow each other so forth. Only the spin dry areas are provided with welded screen substructures, on which then interchangeable sieves rest. It goes on these interchangeable screens actual separation and the movement of the sugar crystals in front of you. This relatively thin surface area is subject to wear, so that a Interchangeability of these non-self-supporting, relatively fine areas there is proposed.
  • Single-stage drums such as those from DE-GM 19 67 178 are generally not able to cope with the requirements as well or less well adapted than two or multi-stage drums.
  • the DE-GM 19 67 178 therefore suggests in the full casing of the centrifugal drum frame insert a sieve basket with a different conicity.
  • the invention is therefore based on the object of a continuous centrifuge to create according to the preamble of claim 1, with an improvement the end product quality generated, in particular the sugar quality is, with changing requirements with regard to the type of suspension can be intercepted and a slow and smooth transport the suspension in the drum is made possible.
  • the task is carried out by a continuous centrifuge according to the generic term of claim 1 solved in that basket inserts with required inclined Walls and these covering screens for interchangeable insertion are provided in the drum. Furthermore, the task is performed by a Basket insert for a continuous centrifuge released, one at an angle ⁇ circumferential wall with exchangeable arranged vertically Has sieve, in which the sieves by means of locating pins or fasteners with the same effect are connected to the wall, and at which a fastening ring with fasteners on the upper circumference of the basket insert the centrifuge is provided for connection to a drum. Further developments of the invention are defined in the subclaims.
  • the angle of inclination of the walls of the basket inserts and the Slit width of the screens varies depending on the product to be separated selectable and combinable and adaptable to this as required.
  • the dwell time on the slope of the sieves is a relevant factor here call.
  • a steeper angle should be selected for faster and easier separation of the crystals from the liquid to reach.
  • finer crystals on the other hand, there is more of a flat angle of inclination the walls of the basket inserts and thus also the sieves.
  • Strainer used is preferred.
  • the ratio of fixed to is also important for transport on the sieve Liquid component in the magma, i.e. the crystal suspension.
  • the liquid the suspension acts as a lubricant between the crystals.
  • Will the Liquid can be drained off immediately through an open screen surface Build up dry crystals on a wall with a flat inclination.
  • the liquid becomes through a very little open sieve surface retained (on the sieve), the crystals slide despite a steep one Angle of inclination of the basket insert wall too quickly from the drum or the basket insert.
  • the angle of inclination ⁇ of the walls of the basket inserts is particularly high preferably between 10 ° and 30 °.
  • Basket inserts with inclination angles ⁇ of 23 °, 25 ° and 27 ° can be provided.
  • the screens are preferably interchangeable within the basket inserts, for example they are fastened in the basket inserts with locating pins.
  • Centrifuge can provide a cover ring on the upper circumference of the basket inserts be.
  • a swirl of air is excluded in this area can be, for example, in the transition area from the Sieve the basket insert of the pre-separation stage only a small transition to Sieve of the main separation stage is formed, for example a transition of 1.5 mm, no ring is generally required.
  • Such a cover ring preferably has such dimensions that he with the part of the drum that as Main separation stage is provided, can be detachably connected, provided that Basket insert is arranged in the pre-separation stage.
  • the basket inserts themselves preferably have a fastening ring, by means of which they in the drum by fasteners, for example by Screws that can be attached.
  • a symmetrical one is preferred Arrangement of the screws provided, since in such continuous working centrifuges revolutions of up to 2000 revolutions per Minute can be achieved.
  • the requirements for the concentricity are therefore understandably very high, for example the tolerances are 1 mm.
  • FIG. 1 shows a sectional view of a continuous centrifuge 1 according to the invention.
  • the centrifuge 1 is driven by a motor 2 via a drive train 3.
  • the rotating part of the centrifuge is mounted on a chassis 4.
  • the centrifuge has a product distributor 5 in which, for example, a crystal suspension is entered, and underneath a distribution bell 6. Concentric a drum 10 of the centrifuge is arranged around the distributor bell 6.
  • the drum 10 is two-stage in the form shown, i.e. she points a pre-separation stage 20 and a main separation stage 30.
  • the angles of inclination ⁇ and ⁇ of the walls of the preliminary separation stage 20 and Main separation stage 30 are different.
  • the angle of inclination ⁇ of the pre-separation stage 20 chosen steeper than the angle of inclination ⁇ of the Main separation stage 30.
  • the pre-separation stage is usually used to separate the Crystals of liquid and the main separation step of washing the separated Crystals.
  • the main separation stage 30 has on its wall 31 a sieve 32 all around.
  • the pre-separation stage is provided with an exchangeable basket insert 40.
  • a basket insert 40 is shown in the sectional view in FIG. 2 .
  • the basket insert has an outer wall 41. From its inside, the wall 41 is provided with a sieve 42 on its entire surface.
  • the wall surface 41 has an angle of inclination ⁇ to the vertical. This inclination angle ⁇ is selected differently for different basket inserts depending on the product to be separated. For example, it is between 10 ° and 30 °.
  • the dwell time on the seven of the pre-separation stage is u. a. through the angle of inclination ⁇ and also by the degree of opening of the screen area of the Basket insert determined.
  • a lower angle of inclination ⁇ i.e. steeper wall of the basket insert, can be chosen for a quick separation of crystals and liquid to achieve. This happens for example with coarse crystals. A bigger one Tilt angle ⁇ can therefore be selected for fine crystals; the wall the basket insert is then flatter.
  • other factors are important for the actual separation behavior of the suspension, such as the ratio from solid to liquid portion in the suspension and the openness already mentioned the screen area of the screen 42.
  • the other decisive factor for the separability of the crystals from the Liquid within the crystal suspension is the opening width of the sieve surface the sieves 42.
  • the sieve surface should be opened further or less widely. It will be here preferably a mutual dependence between the angle of inclination ⁇ of the wall 41 and openness of the screen surface of the screen 42 used, for example to get particularly high quality products. For example, if a large open sieve surface is desired, this can be combined with the basket inserts set much higher value than in the prior art is possible, for example even values of 14% or more can be achieved will. This places an upper limit on the openness of the screen surface by the fact that the crystals may be within the slots of the Sieben could get caught.
  • a sieve surface can also be used With a small opening width may be required to achieve the desired goal to achieve slow and even transport on the sieve.
  • the angle of inclination ⁇ of the wall of the basket insert turn off and a suitable comparison between the angle of inclination ⁇ and To create degree of opening of the screen area, the ratio of fixed and Liquid content of the crystal suspension also has an influence on its residence time from the pre-separation stage.
  • a fastening ring 45 arranged with fasteners 46 in the form of screws.
  • the mounting ring protrudes beyond the upper circumference of the wall 41. He is shaped similar to a clamping ring in a known drum, which is provided between the pre-separation stage 20 and the main separation stage 30. He is used to attach the pre-separation stage to the main separation stage.
  • the fastening ring 45 also serves to fasten the basket insert to the Main separation stage.
  • the fastening ring has such dimensions that he is within a drum in the transition area from the pre-separation stage 20 are arranged to the main separation stage 30 and fastened there can. It is preferably shaped so that it is easily accessible for easy access and quick assembly and disassembly of the basket insert for needs-based Exchange is made possible.
  • the screen 42 can be protected against being thrown up during the rotation of the centrifuge drum by a cover ring 47.
  • a cover ring 47 rests on the basket insert on its upper edge 48 in the transition region between the preliminary separation stage 20 and the main separation stage 30.
  • the screen 42 is preferably pulled a little over this edge at this point so that the cover ring can rest on the edge area of the screen 42.
  • Such a cover ring 47 is not necessary, however, if a swirling of the air at this transition point can be excluded. This is generally the case if the transition in this area is only a few millimeters, for example 1.5 mm.
  • a cover ring should preferably be used for larger differences in height of the transition area.
  • the cover ring is releasably attached to the sieve, in particular in order to enable the basket insert to be replaced quickly and easily. Such a releasable connection is produced, for example, by fastening means such as screws.
  • a high-quality material in particular, is used as the material for the basket inserts Stainless steel, used.
  • other materials can of course also be used are used, but preferably the material which also provided for the drum, in particular for the main separation stage 30 is.

Landscapes

  • Centrifugal Separators (AREA)
EP98111767A 1997-06-27 1998-06-25 Inserts pour panier d'une centrifuge à fonctionnement continu Withdrawn EP0887109A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997127359 DE19727359A1 (de) 1997-06-27 1997-06-27 Kontinuierliche Zentrifuge
DE19727359 1997-06-27

Publications (2)

Publication Number Publication Date
EP0887109A2 true EP0887109A2 (fr) 1998-12-30
EP0887109A3 EP0887109A3 (fr) 1999-11-03

Family

ID=7833833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98111767A Withdrawn EP0887109A3 (fr) 1997-06-27 1998-06-25 Inserts pour panier d'une centrifuge à fonctionnement continu

Country Status (2)

Country Link
EP (1) EP0887109A3 (fr)
DE (1) DE19727359A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3062579A1 (fr) * 2017-02-08 2018-08-10 Fives Cail Panier pour essoreuse centrifuge a fonctionnement continu

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108067A (en) * 1960-10-14 1963-10-22 Braunschweigische Maschb Ansta Centrifugal apparatus
FR1355763A (fr) * 1963-02-08 1964-03-20 Fives Lille Cail Essoreuse continue, avec lavage et séparation d'égouts
DE2364260A1 (de) * 1973-12-22 1975-06-26 Krauss Maffei Ag Waschzentrifuge
DE7640275U1 (de) * 1976-12-23 1977-06-16 Braunschweigische Maschinenbauanstalt, 3300 Braunschweig Konischer schleuderkorb
DE2936659A1 (de) * 1979-09-11 1981-03-19 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende zuckerzentrifuge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1967178U (de) * 1964-07-04 1967-08-24 Hein Lehmann Ag Siebschleudertrommel, insbesondere fuer zuckerzentrifugen.
DE8105054U1 (de) * 1981-02-24 1982-09-30 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig "Kontinuierlich arbeitende Zuckerzentrifuge"
DE3629354C2 (de) * 1986-08-28 1995-04-13 Balco Precision Gmbh Durch Galvanoformung hergestelltes Sieb für Zentrifugen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108067A (en) * 1960-10-14 1963-10-22 Braunschweigische Maschb Ansta Centrifugal apparatus
FR1355763A (fr) * 1963-02-08 1964-03-20 Fives Lille Cail Essoreuse continue, avec lavage et séparation d'égouts
DE2364260A1 (de) * 1973-12-22 1975-06-26 Krauss Maffei Ag Waschzentrifuge
DE7640275U1 (de) * 1976-12-23 1977-06-16 Braunschweigische Maschinenbauanstalt, 3300 Braunschweig Konischer schleuderkorb
DE2936659A1 (de) * 1979-09-11 1981-03-19 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende zuckerzentrifuge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3062579A1 (fr) * 2017-02-08 2018-08-10 Fives Cail Panier pour essoreuse centrifuge a fonctionnement continu

Also Published As

Publication number Publication date
EP0887109A3 (fr) 1999-11-03
DE19727359A1 (de) 1999-01-07

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