EP0497699B1 - Procédé perfectionné de traitement préliminaire des cossettes avant diffusion - Google Patents

Procédé perfectionné de traitement préliminaire des cossettes avant diffusion Download PDF

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Publication number
EP0497699B1
EP0497699B1 EP92400242A EP92400242A EP0497699B1 EP 0497699 B1 EP0497699 B1 EP 0497699B1 EP 92400242 A EP92400242 A EP 92400242A EP 92400242 A EP92400242 A EP 92400242A EP 0497699 B1 EP0497699 B1 EP 0497699B1
Authority
EP
European Patent Office
Prior art keywords
juice
diffusion
cossettes
leaching
saccharator
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
EP92400242A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0497699A1 (fr
Inventor
François Rouanne
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.)
Dambrine Francis
F C B
Original Assignee
Dambrine Francis
F C B
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 Dambrine Francis, F C B filed Critical Dambrine Francis
Publication of EP0497699A1 publication Critical patent/EP0497699A1/fr
Application granted granted Critical
Publication of EP0497699B1 publication Critical patent/EP0497699B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B10/00—Production of sugar juices
    • C13B10/08—Extraction of sugar from sugar beet with water
    • C13B10/083—Treatment of sugar beet before extraction
    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B10/00—Production of sugar juices
    • C13B10/14—Production of sugar juices using extracting agents other than water, e.g. alcohol or salt solutions

Definitions

  • the present invention relates to the extraction of sugar from beets by diffusion, an operation consisting in subjecting the beet pods to backwash leaching with hot water to produce, on the one hand, a sweet juice which is purified before being concentrated by evaporation then subjected to crystallization and, on the other hand, pulps which are pressed, to extract water which is recycled in diffusion, then dried.
  • a saccharator which can be of the endless belt type or of any other suitable type for ensuring mass exchanges between cossettes and juice.
  • this device there is either a generally counter-current circulation of the pods and the saccharated juice, or successively a generally counter-current circulation then a generally co-current circulation.
  • a so-called "leaching" juice consisting of a fraction of the saccharated juice used for processing the pods and the cellular juice of the pods opened during the cutting of the beets caused by leaching.
  • This juice which, due to this leaching, contains impurities in very large quantities, in particular pectic matter, is subjected to pulping and then to progressive liming and sent to the purification workshop of the sugar refinery.
  • saccharated cossettes are obtained with retention juice from the other fraction of the juice used for the treatment, juice retained by capillarity in the mass of the treated cossettes ; these chips and the retention juice are allowed for distribution.
  • This extraction process comprising the preliminary treatment of the cossettes with a solution of calcium monosaccharate is called extraction or alkaline diffusion. It makes it possible to produce pulps having better pressability and to obtain, after mechanical pressing, pulps with a higher dry matter content and, consequently, to achieve appreciable energy savings for drying the pulps.
  • This process also makes it possible to partially purify the diffusion juices in the diffuser itself, before racking, thanks to the alkalinity of the pods due to their prior treatment in the saccharator.
  • the impurities resulting from this purification of the juice in the diffuser are physically attached to the pods and are recovered with the spent pulps at the outlet of the diffuser. These impurities are rich in organic matter, in particular pectic, and the additional pulp flow rate which they provide, called "plus-pulp", constitutes an important element of the economic interest of the process.
  • the object of the present invention is to increase the quantity of "plus-pulp" produced in diffusion and, consequently, to further increase the profitability of the alkaline diffusion process.
  • the process which is the subject of the invention consists in returning the leaching juice, previously pulped and possibly pre-limed, to diffusion.
  • the impurities of the juice possibly flocculated by pre-liming, physically attach to the mass of the pods and are recovered with the pulps at the outlet of the diffuser. This increases the amount of "plus-pulp" and, in return, reduces the amount of impurities extracted with the scum and, therefore, the total consumption of lime.
  • the leaching juice will be sent into the heat exchanger placed at the head of the diffusion, which may or may not be incorporated into the diffuser, respecting the conditions of concentration and temperature. It can be introduced at several points of the exchanger to achieve satisfactory growth in the alkalinity of the juice in this device.
  • This installation essentially consists of a saccharator 10 and a diffusion device 12 in which a heat exchanger 14 is incorporated or associated.
  • the saccharator 10 could be, for example, of the endless belt type, the cossettes being loaded in A on the carpet to form a regular layer and subjected to the calcification treatment during their transport from one end to the other of the apparatus. Leaving the saccharator 10, the cossettes are introduced at B into the heat exchanger 14 where they are brought to a suitable temperature, then transferred to the diffuser 12. The spent pulps are extracted at C at the end of the diffuser opposite to that adjacent to the heat exchanger, and water is introduced in D at this end of the diffuser. The cossettes and the water, which gradually loads with sugar, flow against the current in the diffuser and in the exchanger and the sweet juice, called diffusion juice, is extracted at E of the exchanger 14.
  • the pods are treated with saccharated juice according to the process which is the subject of French patent application No. 90/00783 in the name of one of the applicants.
  • the saccharated juice is introduced at F, at an intermediate point of the saccharator, and divided into two streams which flow, respectively, towards the upstream end and towards the downstream end of the saccharator.
  • the circulation of the juice and the cossettes is carried out generally in opposite directions.
  • the exhausted juice or at least depleted in monosaccharate is used to leach fresh pods. Recycling can be provided, as shown in the drawing, to increase the flow of circulating juice and, consequently, the efficiency of leaching.
  • the part of the juice not retained by the pods is extracted at G and constitutes the leaching juice; this juice is pulped at 16, then subjected to progressive liming at 18 and introduced at H into the heat exchanger 14, in accordance with the invention.
  • This introduction of the leaching juice can be done at one or more points of the exchanger, taking into account the conditions of temperature and lime concentration. Some or all of the leaching juice could also be introduced into the diffuser.
  • the organic impurities in the leaching juice, the flocculation of which has been caused by pre-liming physically attach to the cossettes in the heat exchanger or the diffuser and are collected at the outlet of the diffuser with the pulps.
  • the circulation of the juice and the pods takes place generally in the same direction.
  • the juice extracted at the downstream end of the saccharator can be used in the upstream part in mixture with the fresh saccharated juice.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paper (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Non-Alcoholic Beverages (AREA)
  • Preparation Of Fruits And Vegetables (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Saccharide Compounds (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Cephalosporin Compounds (AREA)
EP92400242A 1991-01-31 1992-01-30 Procédé perfectionné de traitement préliminaire des cossettes avant diffusion Expired - Lifetime EP0497699B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9101081 1991-01-31
FR919101081A FR2672302B1 (fr) 1991-01-31 1991-01-31 Procede perfectionne de traitement preliminaire des cossettes avant diffusion.

Publications (2)

Publication Number Publication Date
EP0497699A1 EP0497699A1 (fr) 1992-08-05
EP0497699B1 true EP0497699B1 (fr) 1994-12-07

Family

ID=9409223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400242A Expired - Lifetime EP0497699B1 (fr) 1991-01-31 1992-01-30 Procédé perfectionné de traitement préliminaire des cossettes avant diffusion

Country Status (6)

Country Link
EP (1) EP0497699B1 (da)
AT (1) ATE115190T1 (da)
DE (1) DE69200770T2 (da)
DK (1) DK0497699T3 (da)
ES (1) ES2066565T3 (da)
FR (1) FR2672302B1 (da)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525235B1 (fr) * 1982-04-16 1985-08-23 Ucb Sa Procede d'extraction du jus de betteraves
FR2638465B1 (fr) * 1988-11-03 1991-04-26 France Syndicat Fab Sucre Procede et installation de transfert thermique et/ou massique entre un jus et des cossettes fraiches de betteraves a sucre
FR2641286B2 (fr) * 1988-11-18 1991-12-13 Fives Cail Babcock Perfectionnements a l'extraction par diffusion du sucre de betteraves

Also Published As

Publication number Publication date
DE69200770D1 (de) 1995-01-19
FR2672302B1 (fr) 1994-08-05
ATE115190T1 (de) 1994-12-15
DE69200770T2 (de) 1995-05-18
FR2672302A1 (fr) 1992-08-07
ES2066565T3 (es) 1995-03-01
DK0497699T3 (da) 1995-05-29
EP0497699A1 (fr) 1992-08-05

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