EP2429711B1 - Centrifugeuse à fonctionnement continu - Google Patents

Centrifugeuse à fonctionnement continu Download PDF

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Publication number
EP2429711B1
EP2429711B1 EP10721469.4A EP10721469A EP2429711B1 EP 2429711 B1 EP2429711 B1 EP 2429711B1 EP 10721469 A EP10721469 A EP 10721469A EP 2429711 B1 EP2429711 B1 EP 2429711B1
Authority
EP
European Patent Office
Prior art keywords
product distributor
bell
elements
accordance
continuously operating
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.)
Active
Application number
EP10721469.4A
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German (de)
English (en)
Other versions
EP2429711A1 (fr
Inventor
Eckhard Bartsch
Hans-Heinrich Westendarp
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
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Filing date
Publication date
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Application filed by BMA Braunschweigische Maschinenbauanstalt AG filed Critical BMA Braunschweigische Maschinenbauanstalt AG
Publication of EP2429711A1 publication Critical patent/EP2429711A1/fr
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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
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/06—Arrangement of distributors or collectors in centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/08—Other accessories for centrifuges for ventilating or producing a vacuum in the centrifuge

Definitions

  • Centrifuges with which sugar can be centrifuged and the effluent syrup at the same time thickened, for example, are already from DE 123 174 B1 known. These historical concepts have rotating, perforated drums provided with helical vanes at their upper or lower end faces. This forces the air to pass through the perforated drums to produce the desired evaporation.
  • continuous centrifuges for centrifuging sugar filling compounds are already available from DE 22 07 663 C3 , of the DE 26 31 178 A1 or the DE 38 28 204 C2 known.
  • Such continuous centrifuges also referred to as sugar centrifuges or continuous centrifuges, can be used in the cane and beet sugar industry as well as in sugar refineries. They serve to mix, distribute and accelerate abandoned Zucker spallmassen and to free the crystals of the syrup, for example by washing by adding water or steam.
  • the sugar filler mass strikes the inner surface of the product distributor after a short distance traveled in free flight, which can also be referred to as an acceleration bell or pre-spin drum.
  • free flight the Zuckeryogllmasse from appropriately provided feed lines with steam or deck water can be applied.
  • the sugar centrifuges after the EP 0 487 780 B1 lead the Zuckeryogllmassen first in a distribution pot, from there to the first of the ring elements of the product distributor, from where the Zucker glycollmassen then go after overcoming the annular gap on the next ring element, and finally due to the centrifugal force on the strainer, on the wall they rise to the top.
  • the bell is stationary, so that it allows a supply of air and / or steam from above into the area inside the bell in a simple form.
  • the air guide elements can be practically freely formed and at relatively high flow velocities lead, since the rotational speeds of the product distributor around the axis of the centrifuge are relatively high.
  • the devices with the air guide elements are designed so that they have horizontally arranged, flat sheets. From these surfaces, a variety of sheet metal surface areas is wing or scoop-like issued up.
  • the air guide elements are placed at an angle of more than 30 ° and less than 50 °.
  • angles may additionally be kept adjustable in order to take into account, for example, a changeover of the centrifuge to another filling material, for example another mass of sugar.
  • another filling material for example another mass of sugar.
  • the bell or hood is deliberately designed to be co-rotating. While in the prior art, a stationary bell was advantageous to cause certain pressure conditions in the annulus between product distributor and bell, this is now no longer mandatory in view of the provision of air guide elements between the ring elements, so that the benefits of a co-rotating bell are used can. These advantages are that there is no relative movement between the ring elements and the bell more and thus no specific safety distances in the event of malfunction and the like must be provided.
  • a particularly preferred embodiment of the invention makes use of the common rotation of the bell and of the product distributor with its ring elements, in which air guiding elements, for example air baffles, are also arranged between the product distributor and the bell or hood.
  • one or more feed elements are provided, through which a medium such as air, steam or vapor enriched with syrup droplets is fed into the interior of the bell.
  • the feed element to the bell medium so for example air, steam or syrup-enriched steam from above into the annular space between the inside of the bell and the outside of the ring elements of the product distributor introduces. This is much easier to implement mechanically.
  • centrifuge used for centrifuging sugar filling masses to separate from so-called magma in the course of a multi-stage treatment first mother solution and then to clean the liberated from the mother liquor sugar crystals of residual foreign components.
  • the centrifuge has a stationary frame 10 with a bottom 11, with side walls 12, with a cover 13 and with a hopper 14.
  • a hopper 14 Zuckerphilllmasse is abandoned, which then enters a shaft 15. Also, the hopper 14 and the shaft 15 are stationary.
  • a screen basket 20 which extends from the region of the bottom 11 almost to the cover 13 in the upper region of the centrifuge.
  • the screen basket 20 is axisymmetric to a vertical axis 16 and widens conically from bottom to top. Sugar particles migrate upwards on the inner wall of this screen basket 20 during a relatively rapid rotation of the screen basket 20 and are then thrown outwards at the upper edge 22 of the screen basket 20.
  • the product distributor 40 and the distributor pot 30 are connected to each other and rotate together.
  • the product distributor 40 consists of several annular elements. These annular elements 41, 42, 43 and a further explained below ring element 54 are concentric with each other and to the axis 16. They expand in diameter from top to bottom and each of these four ring elements 41, 42, 43 and 54 is also conically widened downwards. Incidentally, however, each of the ring elements is cylindrically symmetric.
  • the sugar filling masses or crystal masses of the crystal suspension thrown from the distributor cup 30 onto the inner wall of the ring element 41 pass from one ring element 41, 42, 43 to the next lower one, The previous conically surrounding outer ring member 42, 43, 54. They are in each case when overcoming the difference in diameter between two ring elements 41, 42, 43, 54 circulated and homogenized, as they at the same time from the steam, the air or the other media used in particular for the preparation of a crystal suspension are applied.
  • the strainer 20 is closed at the top by an edge 22. From this edge 22, the sugar particles are thrown to the outside, collected there and further processed (not shown).
  • This upper edge is concealed by a horizontally extending and over this upper edge 33 of the cylindrical walls 32 in the direction of the axis 16 projecting annular cover surface 47, protrude outwardly from the projections 48 to the bell 50 and carry this or are fixed thereto.
  • the three ring elements 41, 42 and 43 of the product distributor 40 are the three ring elements 41, 42 and 43 of the product distributor 40. One can see this from the outside. This means that the Zucker Glallmasse be thrown from the interior of the distribution pot 30 on the unrecognizable upper edge 33 to the outside and meet the inside of the uppermost ring member 41. As this widens conically down and rotate all the ring members 41, 42, 43 of the product distributor 40 with the distributor pot 30, the sugar crystals are transported on the inner wall of the ring member 41 by the centrifugal force down.
  • this device 61 has a metal sheet covering this annular gap in an annular manner, which is produced in the spinning process.
  • tabs are preferably cut into the pressing parts by a laser beam and then these tongues, which are initially marked only by means of the cut lines, are then subsequently shaped in the pressing process in such a way that a type of guide plate is produced.
  • Each of the tabs of the device 61 projects in the same form as a guide plate upwards. As can be seen approximately in the perspective drawing, all also have a same bending angle of preferably about 40 degrees. The size of this bending angle can be selected and optimized depending on the consistency of the sugar filling masses to be processed in the centrifuge, for example taking into account a preferred rotational speed of the ring elements 41, 42, 43 about the axis 16.
  • the feed element 52 is now required only to influence and determine the composition of the medium or vapor or air in the area inside the bell 50 and outside the product distributor 40.
  • the medium flowing through the air baffles of the device 61 with the air guide elements flows virtually parallel to the surfaces of the ring elements 41 and 42 downwards; the flow direction is not necessarily exactly perpendicular, but is influenced by the air guide elements. In any case, there is a strong and substantial admission of the perpendicular to the flowing media outwardly in the horizontal direction thrown sugar crystals instead, which are acted upon in this way with the vapor molecules or other desired additives.
  • the same process is repeated, as well as the space between the lower edge of the second ring member 42 and the upper edge of the third ring member 43 is designed in the same shape and having a device 62 with air guide elements, which corresponds to that of the device 61, but a little has larger diameter.
  • This can have the consequence that the air baffles or air guide elements are designed differently, and their number may differ from that of the first device 61.
  • spacers 67 could also be designed in the form of air guide elements. They can also be provided at other positions. Also fasteners in other places are possible. Both the spacers 67 and other connecting elements can be provided detachably.
  • the bell 50 rotates synchronously with the product distributor 40 and its ring elements 41, 42, 43, it is fixed to the upper cover 47 with the projections 48 as mentioned above.
  • aerodynamically optimized sheets At the projections 48 between product distributor 40 and bell 50 are also aerodynamically optimized sheets to recognize, which can be preferably arranged in plug-in technology.
  • This aerodynamically optimized sheets also lead to a Sog bin from top to bottom or in other words, they push the air, the steam or other medium within the interior of the bell 50 down to a certain extent.
  • a co-rotating hood or bell is slipped over the multi-stage product distributor, this co-rotating bell simultaneously forms the last stage or the last ring element for the product distributor.
  • This has the advantage that the medium introduced for the preparation of the crystal suspension, preferably steam, water or syrup, is completely mixed with the crystal suspension of the sugar filling compounds and that this mixture is accelerated continuously until it leaves the last step of the lower ring element.
  • the medium is passed over the rotating parts through the tubular supply element 52 (see FIG FIG. 1 ) are applied at one or more locations and drawn through the baffles of the device 64 in the area between bell 50 and product distributor 40.
  • the medium is passed over the rotating parts through the tubular supply element 52 (see FIG FIG. 1 ) are applied at one or more locations and drawn through the baffles of the device 64 in the area between bell 50 and product distributor 40.
  • This number of stages is given in the illustrated embodiment by the three ring members 41, 42, 43 and the fourth ring member 54; However, it can also be provided a smaller or larger number of ring elements. However, the illustrated shape is the preferred design.
  • the distance between the product distributor 40 and the screen basket 20 or the centrifuge drum can be optimally performed by rotating all parts with the same frequency.
  • the distribution pot 30 can be made larger than the task location of the crystal suspension in diameter in order to achieve a better treatment of Zucker sleepllmassen.
  • FIG. 3 is again shown a section, through the detail of the centrifuge, which in the FIG. 2 can be seen in a perspective view. It can be seen on the outside of the bell 50, which forms the fourth ring member 54 in its lower portion, and therein the product distributor 40 with the other three ring elements 41, 42, 43. Between the ring elements 41 and 42 on the one hand and 42 and 43 on the other hand, one sees in each case the means 61 and 62 with the air guide elements, which are only indicated here. However, it can be seen that the medium between the inside of the bell 50 and the outside of the ring members 41, 42 and 43 of the product distributor 40 are drawn by these means 61 and 62 into the interior of the product distributor 40.
  • the distributor pot 30 Inside the product distributor 40 can be seen above within the first ring member 41, the distributor pot 30 with its cylindrical wall 32 and the upper edge 33 and the rods 34 on the bottom 31.
  • the upper edge 33 of the cylindrical wall 32 of the distribution pot 30 is not covered here and clearly shows that the Zuckeryogllmassen be thrown out from this upper edge 33 after reaching a corresponding degree of filling and meet the inner wall of the conically widening down first ring element 41.

Landscapes

  • Centrifugal Separators (AREA)

Claims (13)

  1. Centrifugeuse à fonctionnement continu dévolue à l'extraction de masses cuites, comprenant
    a) un panier de tamisage (20) à évasement tronconique vers le haut, tournant autour d'un axe vertical (16),
    b) un répartiteur de produit (40) qui s'élargit vers le bas, s'étend jusque dans la région du fond dudit panier de tamisage (20), est essentiellement coaxial audit panier de tamisage (20), forme un bord d'éjection en partie basse, et tourne autour du même axe vertical (16) que ledit panier de tamisage (20),
    c) un pot de distribution (30) prévu à l'intérieur et dans la région supérieure dudit répartiteur de produit (40), en tant que dispositif de délivrance des masses cuites dans la région axiale de la centrifugeuse,
    d) une subdivision du cloisonnement périphérique dudit répartiteur de produit (40) en plusieurs éléments annulaires (41, 42, 43) qui se recouvrent dans la direction dudit axe (16), et dont les diamètres intérieurs diffèrent les uns des autres,
    e) une cloche (50) entourant ledit répartiteur de produit (40) et s'évasant tronconiquement vers le bas,
    caractérisée
    par le fait qu'un dispositif (61, 62), prévu entre au moins deux des éléments annulaires (41, 42, 43) du répartiteur de produit (40), comporte des éléments de guidage d'air qui présentent des tôles planes agencées horizontalement ; et
    par le fait qu'une multiplicité de régions superficielles en tôle sont déployées vers le haut à partir de ces surfaces, à la manière d'ailettes ou de pales.
  2. Centrifugeuse à fonctionnement continu selon la revendication 1,
    caractérisée
    par le fait qu'un dispositif respectif (61, 62), doté d'éléments de guidage d'air, est prévu entre deux éléments considérés (41, 42 ; 42, 43) parmi les éléments annulaires du répartiteur de produit.
  3. Centrifugeuse à fonctionnement continu selon la revendication 1 ou 2,
    caractérisée
    par le fait que trois éléments annulaires (41, 42, 43) sont prévus.
  4. Centrifugeuse à fonctionnement continu selon l'une des revendications précédentes,
    caractérisée
    par le fait que les dispositifs (61, 62), dotés des éléments de guidage d'air, sont des pièces pressées dans lesquelles des lignes sont découpées au moyen d'un laser ; et par le fait que lesdites lignes sont disposées de façon telle qu'elles autorisent un cintrage, vers le haut, de régions triangulaires ou rectangulaires.
  5. Centrifugeuse à fonctionnement continu selon la revendication 4,
    caractérisée
    par le fait que les lignes, découpées à l'aide du laser, sont pourvues d'arrondis à l'extrémité.
  6. Centrifugeuse à fonctionnement continu selon l'une des revendications précédentes,
    caractérisée
    par le fait que les éléments de guidage d'air se dressent suivant un angle supérieur à 30° et inférieur à 50°.
  7. Centrifugeuse à fonctionnement continu selon l'une des revendications précédentes,
    caractérisée
    par le fait que l'ange est réglable.
  8. Centrifugeuse à fonctionnement continu selon l'une des revendications précédentes,
    caractérisée
    par le fait que la cloche (50), entourant le répartiteur de produit (40) et évasée tronconiquement vers le bas, tourne autour de l'axe (16) à la même fréquence que ledit répartiteur de produit (40).
  9. Centrifugeuse à fonctionnement continu selon la revendication 8,
    caractérisée
    par le fait que la région inférieure extrême du cloisonnement intérieur de la cloche (50) fait saillie vers le bas au-delà du répartiteur de produit (40), et forme un élément annulaire supplémentaire (54) conçu pour recueillir les masses cuites expulsées par le bord d'éjection du répartiteur de produit (40), et pour assurer la poursuite de leur convoyage.
  10. Centrifugeuse à fonctionnement continu selon la revendication 9,
    caractérisée
    par le fait que des éléments de guidage d'air d'un dispositif associé sont prévus, également, entre l'élément annulaire (54) et celui (43) des éléments annulaires du répartiteur de produit (40) qui est situé le plus à l'extérieur.
  11. Centrifugeuse à fonctionnement continu selon l'une des revendications précédentes,
    caractérisée
    par le fait que le répartiteur de produit (40), muni des éléments annulaires (41, 42, 43) et des dispositifs (61, 62) dotés des éléments de guidage d'air, peut être remplacé par d'autres répartiteurs de produit présentant un autre nombre d'éléments annulaires et/ou des éléments annulaires à espacements autres et/ou des éléments annulaires à espacements différant les uns des autres.
  12. Centrifugeuse à fonctionnement continu selon l'une des revendications précédentes,
    caractérisée
    par le fait qu'il est prévu un élément d'amenée (52) par l'intermédiaire duquel un fluide, tel que de l'air, de la vapeur ou de la vapeur enrichie en gouttelettes de sirop, est introduit dans l'espace interne de la cloche (50).
  13. Centrifugeuse à fonctionnement continu selon la revendication 12,
    caractérisée
    par le fait que l'élément d'amenée (52), gagnant la cloche (50), pénètre dans ladite cloche (50) depuis le haut.
EP10721469.4A 2009-05-15 2010-05-14 Centrifugeuse à fonctionnement continu Active EP2429711B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009021588A DE102009021588B4 (de) 2009-05-15 2009-05-15 Kontinuierlich arbeitende Zentrifuge
PCT/EP2010/056654 WO2010130827A1 (fr) 2009-05-15 2010-05-14 Centrifugeuse à fonctionnement continu

Publications (2)

Publication Number Publication Date
EP2429711A1 EP2429711A1 (fr) 2012-03-21
EP2429711B1 true EP2429711B1 (fr) 2015-09-30

Family

ID=42664740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10721469.4A Active EP2429711B1 (fr) 2009-05-15 2010-05-14 Centrifugeuse à fonctionnement continu

Country Status (6)

Country Link
US (1) US9180467B2 (fr)
EP (1) EP2429711B1 (fr)
CN (1) CN102438756B (fr)
BR (1) BRPI1010977A2 (fr)
DE (1) DE102009021588B4 (fr)
WO (1) WO2010130827A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8647505B2 (en) 2011-06-24 2014-02-11 The Western States Machine Company Screen clamp with integrated center feed
DE102011119265B4 (de) * 2011-11-24 2018-01-04 Bma Braunschweigische Maschinenbauanstalt Ag Diskontinuierliche Zentrifuge mit Ausräumer zum Ausräumen eines Produktes
US10513746B2 (en) 2016-10-18 2019-12-24 Western States Machine Company Continuous centrifuge systems with multiple-stage mixing

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE123174C (fr) *
US2353983A (en) * 1937-03-10 1944-07-18 Banning Hellmuth Purification of pulp
DE2207663C3 (de) * 1972-02-18 1984-04-26 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Zuckerzentrifuge
DE2436044C3 (de) * 1974-07-26 1986-07-31 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Siebzentrifuge, insbesondere Zuckerzentrifuge
DE2631178C3 (de) * 1976-07-10 1981-05-27 Maschinenfabrik Buckau R. Wolf Ag, 4048 Grevenbroich Kontinuierlich arbeitende Siebzentrifuge, insbesondere Zuckerzentrifuge
US4052304A (en) * 1976-07-21 1977-10-04 Cf&I Engineers, Inc. Preheating device for centrifugal
DE3129392C1 (de) * 1981-07-25 1983-03-31 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Zuckerzentrifuge mit federnden Zuckerauffangblechen
DE3405752C2 (de) * 1984-02-17 1986-02-13 Hein, Lehmann AG, 4000 Düsseldorf Kontinuierlich arbeitende Zentrifuge
DE3828204A1 (de) 1988-08-19 1990-02-22 Braunschweigische Masch Bau Kontinuierlich arbeitende zentrifuge zum einmaischen und abschleudern von zuckerfuellmassen
DE59005216D1 (de) * 1990-11-30 1994-05-05 Braunschweigische Masch Bau Kontinuierlich arbeitende Zentrifuge zum Abschleudern von Zuckerfüllmassen.

Also Published As

Publication number Publication date
CN102438756B (zh) 2013-08-14
DE102009021588B4 (de) 2013-12-12
US20120142513A1 (en) 2012-06-07
BRPI1010977A2 (pt) 2016-03-15
EP2429711A1 (fr) 2012-03-21
CN102438756A (zh) 2012-05-02
US9180467B2 (en) 2015-11-10
DE102009021588A1 (de) 2010-11-25
WO2010130827A1 (fr) 2010-11-18

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