EP0606030A2 - Verfahren und Vorrichtung zur Zuckerauflösung - Google Patents

Verfahren und Vorrichtung zur Zuckerauflösung Download PDF

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Publication number
EP0606030A2
EP0606030A2 EP93403110A EP93403110A EP0606030A2 EP 0606030 A2 EP0606030 A2 EP 0606030A2 EP 93403110 A EP93403110 A EP 93403110A EP 93403110 A EP93403110 A EP 93403110A EP 0606030 A2 EP0606030 A2 EP 0606030A2
Authority
EP
European Patent Office
Prior art keywords
chamber
crystals
cooked
mass
liquor
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Withdrawn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
EP93403110A
Other languages
English (en)
French (fr)
Other versions
EP0606030A3 (de
Inventor
Jean-Claude Giorgi
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.)
F C B
Original Assignee
GROUPEMENT D'INTERET ECONOMIQUE IRIS
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 GROUPEMENT D'INTERET ECONOMIQUE IRIS filed Critical GROUPEMENT D'INTERET ECONOMIQUE IRIS
Publication of EP0606030A2 publication Critical patent/EP0606030A2/de
Publication of EP0606030A3 publication Critical patent/EP0606030A3/de
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B30/00—Crystallisation; Crystallising apparatus; Separating crystals from mother liquors ; Evaporating or boiling sugar juice
    • C13B30/04—Separating crystals from mother liquor
    • C13B30/06—Separating crystals from mother liquor by centrifugal force
    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B30/00—Crystallisation; Crystallising apparatus; Separating crystals from mother liquors ; Evaporating or boiling sugar juice
    • C13B30/04—Separating crystals from mother liquor
    • C13B30/08—Washing residual mother liquor from crystals
    • C13B30/10—Washing residual mother liquor from crystals in centrifuges
    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B30/00—Crystallisation; Crystallising apparatus; Separating crystals from mother liquors ; Evaporating or boiling sugar juice
    • C13B30/04—Separating crystals from mother liquor
    • C13B30/14—Dissolving or refining raw sugar

Definitions

  • the invention relates to sugar crystallization workshops in which an overhaul of the crystals is necessary and in particular the sugar refinery, refinery or sugar refinery workshops in which the melted sugar liquor is used, either directly or as a mixture with other products, as a product to crystallize.
  • the aim of the present invention is to provide a new recasting process making it possible, in particular, to produce liquors with a high brix (dry matter content) and, therefore, reduce the thermal consumption of the crystallization workshop, and d '' improve the quality of sugar by reducing the risk of coloring.
  • the subject of the invention is a process for re-melting sugar consisting in introducing a mass-cooked into a chamber, one wall of which is constituted by a filtering surface, separating by filtration the mother liquor from the crystals of the mass-cooked and supplying said chamber with a liquid capable of dissolving the crystals, the solution obtained (recast liquor) being discharged through the filtering surface.
  • a liquid-crystal mixture is called a terracotta such that after maximum recasting of the crystals in the liquid (saturation) at the temperature of introduction of the mixture into the device which is the subject of the invention, the content residual crystal is at least 30%.
  • the mass-cooked can be formed for the needs of the operation or come from one of the cooking appliances.
  • the liquid used to dissolve the crystals may be water, syrup, juice or liquor from a first overhaul, products known in sweets.
  • the operation can be carried out batchwise or continuously.
  • the massacotta is introduced continuously into a first chamber, two opposite walls of which are constituted by a filtering surface, the liquid capable of dissolving the sugar crystals is introduced continuously into a second chamber adjacent to the first and separated from the latter by one of the filtering surfaces, and the recast liquor is continuously discharged through the second filtering surface.
  • the invention also relates to an apparatus for implementing this method consisting of a container, one wall of which is a filtering wall and a collecting chamber capable of collecting the solution having passed through said filtering wall.
  • a continuous-running device comprises a first chamber which is provided with an inlet for the terracotta and an outlet, spaced from one another, and of which two opposite walls are formed, at least in part, by filtering surfaces, a second chamber which is joined to the first and separated from the latter by one of the filtering surfaces and which is provided with an inlet for the liquid capable of dissolving the sugar crystals, and a third chamber which is attached to the first and separated therefrom by the other filtering surface and which is provided with an outlet for the recast liquor.
  • the device is vertical and of revolution, the three chambers being concentric, and the first chamber which has an annular section surrounds the second chamber and is surrounded by the third, or vice versa, and is provided an inlet for the mass-cooked at its base and an outlet at its top.
  • FIGS. 1, 2 and 3 are schematic representations of apparatus for implementing the invention
  • FIG. 4 is the diagram of an installation designed to prevent clogging of the filtering surfaces in the implementation of the invention.
  • the apparatus shown in Figure 1 consists of a closed container 10 whose interior is divided into 3 chambers 12, 14 and 16 by two vertical filter partitions 18, 20; these partitions can be constituted by a sieve, a perforated sheet, a porous wall, etc. To each chamber is connected a supply pipe equipped with a valve 22, 24 and 26.
  • the chamber 14 is filled with mass-cooked obtained by pasting, that is to say by mixing crystals with a liquor of suitable brix and purity, then the valve 24 is closed.
  • the melting liquid is then introduced under pressure into the chamber 12; it crosses the filtering partition 18, then the chamber 14, driving out the liquor from the mass-cooked and dissolving part of the crystals, and finally the partition 20.
  • the solution obtained is collected in the chamber 16 and evacuated to a container of storage.
  • the supply to the chamber 12 is cut off and a new cycle is started by filling the chamber 14 with mass-cooked material; during this operation, the valve 26 must remain open to allow the solution contained in chamber 14 to be evacuated.
  • the filtering partitions could be arranged horizontally and the cells could be superimposed instead of being arranged side by side.
  • the devices described above can also operate continuously.
  • the chamber 14 is stuffed with mass-cooked at constant pressure and the supply of the chamber 12 is adjusted to ensure the total melting of the crystals brought by the flow of mass-cooked.
  • FIG. 3 shows another device, with continuous running, usable for the implementation of the invention.
  • This device is formed by two cylinders 30, 32 concentric and with a vertical axis, constituted by filter screens and their support. These two cylinders delimit between them an annular section chamber 34 and the sieve supports are designed to withstand a pressure exerted in the chamber.
  • the chamber 36 formed by the inner cylinder 30 is closed by two conical bottoms 38 and 40 and the chamber 34 is closed by two conical bottoms 42 and 44.
  • the outer cylinder 32 is provided with a double envelope 46 forming with it a annular section chamber 48.
  • An inlet 50 and an outlet 52 are provided at the bottom and at the top of the chamber 34, respectively.
  • a pipe 54 allows the supply of the chamber 36 and a pipe 56 allows the evacuation of the liquor collected in the chamber 48.
  • the mass-cooked is brought under pressure to the inlet 50 and flows from bottom to top in the chamber 34.
  • the remelting liquid is introduced into the chamber 36 through the piping 54, enters the chamber 36 at through the filtering wall of the cylinder 30, crosses the mass-cooked vein circulating in the chamber 34 dissolving most of the sugar crystals, and the resulting liquor is collected in the chamber 48 and evacuated by the piping 56.
  • the flow rates of mass-cooked and of recasting liquid are chosen so that a small part, approximately 10%, of the flow of mass-cooked is evacuated by the outlet 52. A purge is thus carried out making it possible to evacuate the insoluble products contained in the mass-cooked.
  • the continuous flow of the mass-cooked in the chamber 34 makes it possible to destroy the preferential circuits which could form in the layer of crystals crossed by the recasting liquid and, consequently, to improve the performances of the device.
  • the redesigned liquor can be passed over an auxiliary fine-mesh filter, of the thickener type, to remove these small crystals.
  • the thickener sludge will be a mixture of sugar dust and fairly dense syrup which can either be remelted by mixing with the remelt liquid, or used, in whole or in part, as graining magma for cooking appliances.
  • This diagram is shown in Figure 4: 70 is a mixing tank, 72 a pump, 74 the remelting device and 76 a thickening filter.
  • the filtered recast liquor leaves the filter 76 at F.
  • the sugar dust and syrup magma leaves the filter at M and at least part is sent to tank 70 where it is mixed with the recast liquid R.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Centrifugal Separators (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP93403110A 1993-01-04 1993-12-21 Verfahren und Vorrichtung zur Zuckerauflösung. Withdrawn EP0606030A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9300007A FR2700173B1 (fr) 1993-01-04 1993-01-04 Procédé et appareil pour la refonte du sucre.
FR9300007 1993-01-04

Publications (2)

Publication Number Publication Date
EP0606030A2 true EP0606030A2 (de) 1994-07-13
EP0606030A3 EP0606030A3 (de) 1995-02-22

Family

ID=9442810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93403110A Withdrawn EP0606030A3 (de) 1993-01-04 1993-12-21 Verfahren und Vorrichtung zur Zuckerauflösung.

Country Status (2)

Country Link
EP (1) EP0606030A3 (de)
FR (1) FR2700173B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR389462A (fr) * 1908-04-21 1908-09-10 Alphonse Leon Louis Jarriau Du Appareil pour la fabrication continue à froid des sirops de sucre
DE745404C (de) * 1941-07-05 1944-03-16 Hans Keller Zuckerloeser fuer die Herstellung von Sirup auf kaltem Wege
DE830156C (de) * 1948-12-31 1952-01-31 Hans Keller Zuckerloeser bzw. Aufgussfilterapparat

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2346051A1 (fr) * 1975-11-20 1977-10-28 Braunschweigische Masch Bau Procede et centrifugeuse pour la centrifugation et la redissolution de sucre
US5114489A (en) * 1990-11-29 1992-05-19 Silver Engineering Works, Inc. Means for producing a high brix sugar liquid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR389462A (fr) * 1908-04-21 1908-09-10 Alphonse Leon Louis Jarriau Du Appareil pour la fabrication continue à froid des sirops de sucre
DE745404C (de) * 1941-07-05 1944-03-16 Hans Keller Zuckerloeser fuer die Herstellung von Sirup auf kaltem Wege
DE830156C (de) * 1948-12-31 1952-01-31 Hans Keller Zuckerloeser bzw. Aufgussfilterapparat

Also Published As

Publication number Publication date
FR2700173B1 (fr) 1995-03-17
FR2700173A1 (fr) 1994-07-08
EP0606030A3 (de) 1995-02-22

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