EP1516673A2 - Centrifuge à tamis travaillant en continu et procédé de préparation des crystaux en suspension - Google Patents

Centrifuge à tamis travaillant en continu et procédé de préparation des crystaux en suspension Download PDF

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Publication number
EP1516673A2
EP1516673A2 EP04021431A EP04021431A EP1516673A2 EP 1516673 A2 EP1516673 A2 EP 1516673A2 EP 04021431 A EP04021431 A EP 04021431A EP 04021431 A EP04021431 A EP 04021431A EP 1516673 A2 EP1516673 A2 EP 1516673A2
Authority
EP
European Patent Office
Prior art keywords
sieve
suspension
centrifuge
crystal
suspension liquid
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Withdrawn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
EP04021431A
Other languages
German (de)
English (en)
Other versions
EP1516673A3 (fr
Inventor
Eckhard Bartsch
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 EP1516673A2 publication Critical patent/EP1516673A2/fr
Publication of EP1516673A3 publication Critical patent/EP1516673A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B15/00—Other accessories for centrifuges
    • B04B15/02—Other accessories for centrifuges for cooling, heating, or heat insulating
    • 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
    • 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 sieve centrifuge for processing of crystal suspensions, in particular sugar filling compounds, with a distributor pot and a surrounding, downwardly open hood, on the inside slides along the crystal suspension during operation, wherein the Distributor pot and the hood are arranged in a centrifuge basket.
  • the invention relates to a process for the preparation of crystal suspensions in a continuous centrifuge, in which by the crystal suspension before the separation of the crystals and the suspension liquid in a centrifuge basket a part of the suspension liquid is separated off.
  • the Crystal suspension prepared in a product distributor.
  • the well-known product distributors consist of a distributor pot and a conical down opening distributor bell.
  • a sieve centrifuge with a product distributor is for example known from DE 29 30 312 A1.
  • the invention is the problem underlying, a sieve centrifuge and a process for the preparation of crystal suspensions to provide increased and improved quality Crystal separation can be made.
  • the distributor pot surrounding hood is designed as a screening hood, which in turn from a surrounded by open distribution bell, being between the screen cover and the distributor bell is a free space formed and below the screening hood a mixing area for the mixing of the separated suspension liquid and followed by the guided on the screen hood crystal suspension.
  • a uniform Preparation of the crystal suspension in the product distributor or in the so-called Preseparator has the consequence that a uniform product order on the centrifuge basket takes place and overall less power is needed to the To completely separate syrup from the sugar crystals. Due to the good mixing the viscosity of the crystal suspension is lowered and thus the Separation of the crystals from the suspension liquid in the centrifuge basket or facilitated in the drum.
  • a development of the invention provides that on the distributor bell or on the sieve hood means for introducing steam and / or other fluids are formed in the free space, so that on the supply of appropriate media an adjustment of the viscosity of the separated suspension liquid takes place.
  • a change in the viscosity of both the suspension liquid as also followed by the crystal suspension after passing through the Mixing range has the advantage that the efficiency of the entire machine is improved, since the viscosity can be standardized and to the machine conditions can be adjusted. It is important to be continuous working centrifuges crystal suspensions of the same quality, in particular in terms of crystal size, crystal uniformity and viscosity is fed, otherwise adjustments, e.g. in terms of speed, throughput or the amount of steam required or worsening of the Results occurs.
  • the distributor bell is formed heatable or coolable to the viscosity according to the machine requirements or the process parameters can.
  • the Distributor pot a sieve-like inner wall, such as a perforated Wall, a slotted screen, a perforated screen or a woven or slotted screen, from the piping or a downwardly flared cone, the suspension liquid down or out of the centrifuge.
  • the distributor bell itself is closed-walled, so that the suspension liquid evenly distributed on the inner wall of the bell can.
  • a development of the invention provides that the mixing area as a cascade is formed or diverters for mixing the crystal suspension and the separated and recycled suspension liquid having. Through the cascade or by diverters, such as baffles or Corrugations, the rejoined crystal suspension is mixed and evened out so as to increase the overall efficiency of the centrifuge increase.
  • the sieve cover can also be used as a gap sieve be formed, alternatively, perforated sheets, perforated or woven or slotted sieves are used.
  • perforated sheets, perforated or woven or slotted sieves are used.
  • slotted screens has the advantage that a long life realized and on elaborate support structures can be waived.
  • the distributor pot of the product distributor is open at the top and cylindrical trained, alternatively, it may also be conical. Likewise Be installed devices in the distribution pot through which crushes the filling material or is distributed to an even distribution within the distribution pot and to get it in the centrifuge.
  • the inventive method provides that at least a part of the separated Suspension fluid changes in viscosity and the crystal suspension is returned, preferably the viscosity is reduced, thus a separation of the crystal suspension of the suspension liquid in the centrifuge basket is facilitated.
  • the separated suspension liquid subjected to steam and / or other fluids, resulting in the Usually a dilution and an improvement in the flowability of the suspension liquid leads.
  • the suspension liquid is advantageously so acted upon by steam and / or other fluids that a saturated or slightly undersaturated solution, so that the guided along the screen hood Crystals essentially in this treated suspension liquid insoluble. This largely prevents the separated Dissolve or reduce crystals.
  • a part of the suspension liquid is separated and removed from the sieve centrifuge before dissipating another part of the suspension liquid from the crystal suspension separated, viscosity-modified and then the crystal suspension is fed again.
  • FIG. 1 shows a product conditioner 100, which is also called a preseparator, with an upwardly open distributor pot 1, which is a substantially vertical aligned rotation axis 20 rotates.
  • a crystal suspension is introduced into the distributor pot 1 according to the direction of the arrow and a spin exposed. This distributes the crystal suspension, for example, the so-called magma in the separation of sugar crystals of syrup, on the bottom of the distribution pot 1 and is going to the outside emotional.
  • a vertically arranged pot wall 22 formed in the present case as a double wall is provided with an inner screen wall 2.
  • the crystal suspension migrates due to the acceleration and the inflowing Mass upwards, through the Siebwandung 2 a part of the suspension liquid, in the processing of sugar syrup, through the sieve wall 2 passes through and derived by discharge 9 from the sieve centrifuge becomes.
  • the screen wall 2 can as perforated plate, slotted screen, perforated screen or a woven or slotted screen be educated.
  • the ascending in the distributor pot 1 on the screen wall 2 crystal suspension is applied via the centrifugal force to a sieve cover surrounding the distributor pot 1 Thrown 3, which in the illustrated embodiment as a down open, conically widening hood is formed.
  • Thrown 3 which in the illustrated embodiment as a down open, conically widening hood is formed.
  • the separated suspension liquid meets a the Sieve cover 3 surrounding distributor bell 4, which is also open at the bottom and is formed conically widening.
  • the separated suspension liquid migrates on the inner wall 6 down and is in a to the Siebhaube 3 subsequent mixing area 8 with the crystal suspension, the screening hood 3 down along, mixed.
  • a cascade 7 is provided in which the crystals and the separated suspension liquid be thoroughly mixed, creating a homogeneous crystal suspension arises.
  • the illustrated cascade 17 are corrugations or baffles in the mixing area 8 providable, which improved Allow mixing.
  • the mixing region 8 is followed by a substantially smooth-walled cone 10, which also extends down and the merged and mixed mixed crystal suspension down.
  • a substantially smooth-walled cone 10 which also extends down and the merged and mixed mixed crystal suspension down.
  • a substantially smooth-walled cone 10 which also extends down and the merged and mixed mixed crystal suspension down.
  • the thus prepared crystal suspension on the centrifuge basket, not shown hurled in which the final separation of the suspension liquid made of the crystals contained therein.
  • the product conditioner or preseparator 100 is used for product preparation and Preparation before the final separation of the crystals from the suspension liquid in the centrifuge basket or in the centrifuge drum.
  • the thus prepared, separated in the screening hood 3 suspension liquid is according to the requirements of the machine or the processing method in adjusted viscosity, preferably the viscosity is reduced, to ensure a good mixing of the crystal suspension, which the Separation of the crystals from the suspension liquid in the last separation stage facilitated in the centrifuge basket.
  • the suspension liquid so prepared that a saturated or only slightly undersaturated solution is present.
  • the syrup is so diluted is that located on the inner wall of the screen cover 3 and transported down sugar crystals not in the prepared suspension liquid dissolve.
  • the illustrated apparatus and method have the advantage that only the suspension liquid with a treatment medium, such as Steam or water is applied, but not the crystal suspension, so dissolving the crystals by supplying steam and / or others Fluide is avoided. It thus finds a particularly effective and crystals little interfering treatment of the crystal suspension instead, so that in total the effectiveness of the centrifuge in terms of product quality and Energy consumption is improved.
  • a treatment medium such as Steam or water
  • FIG. 2 shows a variant of the embodiment of the preseparator 100 according to FIG 1, in which instead of cylindrically arranged discharge 9 a Ableitkonus 11 is provided, the separated in the distribution pot 1 suspension liquid leads down.
  • the inner wall 6 the distributor bell 4 can Verwirbelungs- and mixing devices, such as Have baffles, cascades or corrugations to the separated suspension liquid with the introduced medium, such as steam or water, too improve.
  • the distributor bell 4 only heated is, for example, by the distributor bell 4 is double-walled and steam or heating gas is introduced so that the suspension liquid is changed by heating in the viscosity.
  • the Suspension liquid flowing along the distributor bell 4 also thickened or cooled.
  • a particularly advantageous embodiment of the invention provides that both the sieve-like inner wall 2 and the screening hood 3 are formed as a slotted screen, which is shown in detail in Figure 3.
  • a gap sieve provides a support wire 50, welded on the screen wires 51 or otherwise are attached. These screen wires 51 form in the transport direction the suspension fluid to be separated widening, conical space, through which the suspension liquid can pass.
  • the complete wall 22 of the distribution pot 1 and also the screening hood a slotted screen is made, so that a correspondingly complex support structure be dispensed with plate, coarse support screen and a fine screen can.
  • crystal suspensions are processed more effectively, with already in the product distributor 100, a preliminary withdrawal of the suspension liquid or Syrup from the crystal suspension and the targeted discharge from the sieve centrifuge he follows. Since less mass has to be accelerated, the specific one becomes Energy consumption lowered and the throughput of the sieve centrifuge is increased, because overall less suspension liquid in the subsequent separation phase must be disconnected. It finds an effective warming up and Viscosity adjustment of the crystal suspension by influencing the separated Suspension liquid held without the crystal structures attacked become. Due to the specially designed mixing area finds an effective Mixing and homogenization of the crystal suspension instead.

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  • Centrifugal Separators (AREA)
EP04021431A 2003-09-17 2004-09-09 Centrifuge à tamis travaillant en continu et procédé de préparation des crystaux en suspension Withdrawn EP1516673A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10343376 2003-09-17
DE2003143376 DE10343376B4 (de) 2003-09-17 2003-09-17 Kontinuierlich arbeitende Siebzentrifuge sowie Verfahren zur Aufbereitung von Kristallsuspensionen

Publications (2)

Publication Number Publication Date
EP1516673A2 true EP1516673A2 (fr) 2005-03-23
EP1516673A3 EP1516673A3 (fr) 2005-07-20

Family

ID=34177827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04021431A Withdrawn EP1516673A3 (fr) 2003-09-17 2004-09-09 Centrifuge à tamis travaillant en continu et procédé de préparation des crystaux en suspension

Country Status (2)

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EP (1) EP1516673A3 (fr)
DE (1) DE10343376B4 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1490323A (en) * 1976-06-04 1977-11-02 Braunschweigische Masch Bau Centrifuge for the continuous separation of sugar from massecuite
DE3008132C2 (de) * 1980-03-04 1983-08-25 Westfalia Separator Ag, 4740 Oelde Vorrichtung zum kontinuierlichen Trennen des Fruchtfleisches von der Fruchthaut und dem Fruchtkern oder den Fruchtkernen sowie Verfahren zur Weinherstellung
DE2930312C2 (de) * 1979-07-26 1985-10-10 Krauss-Maffei AG, 8000 München Siebzentrifuge
DE2948691C2 (de) * 1979-12-04 1984-11-15 Braunschweigische Maschinenbauanstalt AG, 3300 Braunschweig Kontinuierlich arbeitende Zentrifuge zum Einmaischen und Abschleudern von Zuckerfüllmassen
DE3615224C3 (de) * 1986-05-06 1993-12-02 Selwig & Lange Gmbh Kontinuierlich arbeitende Zuckerzentrifuge
DE3828204A1 (de) * 1988-08-19 1990-02-22 Braunschweigische Masch Bau Kontinuierlich arbeitende zentrifuge zum einmaischen und abschleudern von zuckerfuellmassen
DE3933136A1 (de) * 1989-10-04 1991-04-18 Krupp Buckau Maschinenbau Gmbh Verfahren und vorrichtung zum schleudern eines hochviskosen schleudergutes
EP0487780B1 (fr) * 1990-11-30 1994-03-30 Braunschweigische Maschinenbauanstalt AG Centrifugeuse travaillant en continu pour la centrifugation de masses cuites
DE19809863C2 (de) * 1998-03-07 2001-11-22 Dorr Oliver Deutschland Kontinuierlich arbeitende Zentrifuge
US6761821B2 (en) * 2002-09-23 2004-07-13 Weatherford/Lamb, Inc. Clamping-hook ring

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Publication number Publication date
EP1516673A3 (fr) 2005-07-20
DE10343376A1 (de) 2005-05-04
DE10343376B4 (de) 2008-01-24

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