EP0217238B1 - Verfahren und Vorrichtung zur Extraktion des Zuckers aus Zuckerrohr - Google Patents

Verfahren und Vorrichtung zur Extraktion des Zuckers aus Zuckerrohr Download PDF

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Publication number
EP0217238B1
EP0217238B1 EP86112893A EP86112893A EP0217238B1 EP 0217238 B1 EP0217238 B1 EP 0217238B1 EP 86112893 A EP86112893 A EP 86112893A EP 86112893 A EP86112893 A EP 86112893A EP 0217238 B1 EP0217238 B1 EP 0217238B1
Authority
EP
European Patent Office
Prior art keywords
tank
magma
juice
hopper
cell
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
Application number
EP86112893A
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English (en)
French (fr)
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EP0217238A1 (de
Inventor
Alain Gautier
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.)
Maguin SAS
Original Assignee
Maguin SAS
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Filing date
Publication date
Application filed by Maguin SAS filed Critical Maguin SAS
Priority to AT86112893T priority Critical patent/ATE45186T1/de
Publication of EP0217238A1 publication Critical patent/EP0217238A1/de
Application granted granted Critical
Publication of EP0217238B1 publication Critical patent/EP0217238B1/de
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B10/00—Production of sugar juices
    • C13B10/02—Expressing juice from sugar cane or similar material, e.g. sorghum saccharatum
    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B10/00—Production of sugar juices
    • C13B10/02—Expressing juice from sugar cane or similar material, e.g. sorghum saccharatum
    • C13B10/04—Expressing juice from sugar cane or similar material, e.g. sorghum saccharatum combined with imbibition

Definitions

  • the invention relates to the extraction of sugar from sugar cane.
  • the most ancient conventional extraction method consists in grinding the canes using a knife crusher in order to open the cells, then passing the preparation obtained through cane mills made up of fluted cylinders exerting between them a great pressure of 50 to 100 bars.
  • the installation is relatively expensive and consumes a large amount of energy for driving these cylinders.
  • the extraction efficiency to be excellent, requires a significant installation.
  • the conventional process was subsequently taken up to improve it and lead to the reimibition process.
  • This process essentially consists of watering the cane prepared with extracted juice, then crushing it again in a mill according to the first, the process being continued using several reimibitions and several successive mills, in order to improve the extraction yield.
  • the result is that the overall efficiency of the equipment is improved.
  • the complete installation remains expensive, cumbersome and consumes a great deal of energy, in return for the increase in extraction efficiency.
  • the object of the invention is to provide an extraction process with good efficiency and low cost which avoids the above drawbacks, in particular which reduces the size of the installations and which implements a lower power than that of conventional methods. , were they improved, this being obtained mainly by multiple low pressure passages in an aqueous medium thus avoiding methodically air intake.
  • the invention consists in pressing the previously prepared canes, then the magma (preparation and juice) between several pairs of fluted cylinders, each pair being completely submerged in a tank and fed by a hopper, and this by combining recirculation on the one hand constant of the magma, from each tank to the corresponding hopper, with a large flow, and on the other hand a counter-current circulation of the preparation and of the juice with a lower flow in the various tanks corresponding to the various pairs of cylinders.
  • the installation for the implementation of this process therefore comprises a series of tanks, in reduced number, each containing a pair of grooved cylinders surmounted by a feed hopper, with means for recycling and other means. to ensure the counter-current circulation of the preparation and the juice.
  • the circulation of the juice is advantageously done by simple overflow from one tank to another, the tanks being placed at stepped heights, with recirculating magma pumps raising the magma from a tank to the corresponding hopper, and transfer magma pumps raising the magma from a tank to the hopper of the tank located upstream (or to the bagasse outlet for the most upstream tank).
  • the transfer pumps each pour the magma onto a separator with a curved grid, the dripping juice being brought back to the tank from which the magma comes, while the coarsely drained preparation flows by gravity in the corresponding hopper or towards the exit.
  • the juice transfer chutes by overflowing from an upstream tank to a downstream tank are preferably also equipped with a curved grid constantly swept by the paddles of a rotary reel in order to let the juice pass but to constantly bring back the preparation in the upstream tank.
  • Each extraction cell comprises, according to the invention, a pair of grooved cylinders 1 and 2 with horizontal axes, 3 and 4, completely submerged in a tank C.
  • the cylinder 1 is motor, and its axis 3, without travel, passes through the walls of the tank by caulks 5, one of the ends of the shaft 3 being driven by a gearmotor mechanism 6 optionally at variable speed.
  • the other roller 2 has its axis 4 which spins in bearings 7 located at the end of the substantially vertical branches 8 of a stirrup, partially submerged, ensuring the horizontal movement of the shaft 4 without requiring any wall crossing.
  • This stirrup is made up, in addition to the vertical branches 8, by a shaft 9 mounted in bearings 10 fixed on the tank.
  • the pressurization of the cylinder 2 on the cylinder 1 is ensured by one or two lateral jacks 11 located outside the tank C.
  • the cylinder 2 with travel is mounted idly, and driven directly by the engine cylinder 1 by the intermediate of grooves 12 which mesh with each other.
  • a feed hopper 13 constituted by two end flanges 14, connecting in an almost sealed manner with the end faces of the cylinders, and two vertical side walls 15 connecting with the periphery of these cylinders.
  • Each hopper 13 has a double feed: on the one hand, a pipe 16 drains magma there and on the other hand, a separator 17 with a curved grid 18 d pours out of the coarsely drained preparation, the dripping juice leaving in 19 for be returned to the downstream tank.
  • Each tank C comprises an overflow outlet chute 20, also closed by a curved grid 21, the surface of which is continuously swept by the blades 22 of a reel 23 driven in rotation in the direction of the arrow 24 by a geared motor 25, this so as to constantly bring back towards the tank the preparation which accumulates against the grid 21.
  • the tank C also comprises an inlet chute 26 for the tank C 3 most upstream, this inlet chute being constituted by the outlet chute 20 of the previous tank for the other tanks C 2 , C l .
  • the tank C has two pipe outlets 27 and 28 for the magma.
  • each outlet chute 20 is connected to the inlet 26 of the next tank, as shown more particularly in FIG. 1.
  • the installation is completed by a series of pumps intended to ensure systematic circulation.
  • recirculation pumps R “R 2 and R 3 , associated respectively with the three tanks C" C 2 and C 3 , and which are magma pumps sucking the magma in the outlet 27 of each tank and discharging it in the feed 16 of the corresponding hopper 13.
  • transfer pumps T “T 2 and T 3 which are also magma pumps connected to the outlet 28 of the corresponding tank and which discharge the magma at 29, above the separator with a curved grid 17 from the upstream tank for T, and T 2 , or at 30 above a last separator with a curved grid 17 supplying the bagasse outlet 31.
  • the juice outlets 19 from the various separators 17 pour the juice into the downstream tank, that is to say the tank from which the pumped magma comes, this by simple natural flow, or using a pump 32 if necessary.
  • the prepared canes are fed at 33 into the hopper of the downstream tank. They are pressed by the first pair of cylinders and recycled several times by positive drive thanks to systematic recirculation. Naturally, the speed of the cylinders is adjusted as a function of both the flow of rods arriving at 33 and the recirculation flow arriving at 16, and the recirculation pump of each tank is adjusted to ensure this flow with a slight excess which s 'flows through the weir 34 that each hopper 13 comprises. According to the invention, the various parameters are determined so that the recycling rate is much higher than the main product rate, for example five times this rate. Each cell therefore operates in principle five press-rebimbitions, which considerably increases the efficiency of the installation and in particular makes it possible to obtain good extraction yields with a reduced number of extraction cells, for example three in 1 example shown.
  • This tank C 3 also receives the juice recovered in 19 from the last separator 17 and which is sent to 26, at the same time as a supply of pure water 36 to supplement the losses.
  • the grids 21 and the reels 23 prevent the bagasse from being driven in the opposite direction.
  • the juice circulates in the opposite direction, starting from weakly concentrated products originating from the mixture of the juice recovered at 26, press water returned to 35 and pure water sent to 36, this mixture being enriched in sugar in the tank C 3 and circulating from upstream to downstream with a progressively increasing concentration, to exit in 37 at its maximum concentration from where it is then purified and separated by the usual means.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Saccharide Compounds (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Medicines Containing Plant Substances (AREA)

Claims (5)

1. Verfahren zur Extraktion von Rohrzucker durch Hindurchleiten der Zuckerrohr-Fasermasse und des Magmas durch mehrere Paare Riffelwalzen, dadurch gekennzeichnet, daß jedes Walzenpaar vollständig in eine Wanne (C) eingetaucht und aus einem Bunker (13) versorgt wird, und daß einerseits mit großem Durchsatz eine ständige Rezirkulation des Magmas jeder Wanne in Richtung auf den zugehörigen Bunker und andererseits mit geringerem Durchsatz eine Gegenstromumwälzung der Zuckerrohr-Fasermasse und des Rohrzuckersafts in den zu den verschiedenen Walzenpaaren gehörigen Wannen (C1, C2, C3) vorgenommen wird.
2. Anlage zur Ausübung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß sie eine kleine Zahl von Extraktionszellen aufweist, die jeweils ein Paar Riffelwalzen (1, 2) enthalten, über denen sich ein Bunker (13) befindet und die vollständig in die Wanne (C) eingetaucht sind, sowie eine Rückführungspumpe (R1, R2, R3), die das Magma in der Wanne der Zelle abzieht und es in den Bunker (13) der gleichen Zelle überleitet, und eine Förderpumpe (T1, T2, T3), die das Magma in der Wanne der Zelle abzieht und es in den Bunker der stromauf gelegenen Zelle überleitet oder, im Falle der am weitesten stromauf gelegenen Wanne (C3), in Richtung des Bagasseaustritts (31) fördert, wobei die verschiedenen Wannen (C1, C2, C3) kaskadenartig angeordnet sind, um den Rohrzuckersaft von oben stromabwärts fließen zu lassen.
3. Anlage nach Anspruch 2, dadurch gekennzeichnet, daß jedes Abziehen von Magma (29) von der entsprechenden Förderpumpe über eine Trennvorrichtung (17) mit gebogenem Rost erfolgt, wobei der auf diese Weise abtropfende Saft (19) in diejenige Wanne der Zelle zurückgeführt wird, aus der das Magma stammt.
4. Anlage nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, daß das Abfließen des Rohrzuckersafts durch Überlaufen jeder Wanne in Richtung auf die stromab gelegene Wanne oder, im Falle der am weitesten stromab gelegenen Wanne (C1), in Richtung auf den Saftaustritt (37) über eine Rutsche (20) erfolgt, die durch einen gebogenen Rost (21) quer abgeschlossen ist, dessen Oberseite von Schaufeln (22) eines Flügelrades (23) abgekehrt wird, das sich derart dreht, daß es die an diesem Rost angehäufte Bagasse ständig in Richtung der stromauf gelegenen Wanne zurückführt.
5. Anlage nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß jedes Walzenpaar (1, 2) eine unverlagerbar angeordnete Antriebswalze (1) aufweist, deren Antriebsache (3) die Wände der Wanne (C) in Abdichtungen (5) durchsetzt, während die andere Walze (2) beweglich angeordnet ist und von der vorgenannten Walze mit Hilfe von ausreichend hohen Riffeln (12) mitgenommen wird, und daß die Achse (4) dieser beweglichen Walze (2) unten an einem Bügel (8 - 9) aufgehängt ist, dessen Schenkel eingetaucht sind und der an dem oberen Teil der Wanne angelenkt ist und von mindestens einem außerhalb der Wanne angeordneten Arbeitszylinder (11) druckbeaufschlagt wird.
EP86112893A 1985-09-18 1986-09-18 Verfahren und Vorrichtung zur Extraktion des Zuckers aus Zuckerrohr Expired EP0217238B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86112893T ATE45186T1 (de) 1985-09-18 1986-09-18 Verfahren und vorrichtung zur extraktion des zuckers aus zuckerrohr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8513843A FR2587363B1 (fr) 1985-09-18 1985-09-18 Procede et installation pour l'extraction du sucre de la canne a sucre
FR8513843 1985-09-18

Publications (2)

Publication Number Publication Date
EP0217238A1 EP0217238A1 (de) 1987-04-08
EP0217238B1 true EP0217238B1 (de) 1989-08-02

Family

ID=9323021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112893A Expired EP0217238B1 (de) 1985-09-18 1986-09-18 Verfahren und Vorrichtung zur Extraktion des Zuckers aus Zuckerrohr

Country Status (5)

Country Link
US (1) US4804418A (de)
EP (1) EP0217238B1 (de)
AT (1) ATE45186T1 (de)
DE (1) DE3664786D1 (de)
FR (1) FR2587363B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX166939B (es) * 1989-04-21 1993-02-15 Biotecnologia Y Derivados De M Sistema mejorado de baja presion para la extraccion de solubles de materia fibrosa
US5358571A (en) * 1993-05-27 1994-10-25 Villavicencio Eduardo J Enhanced sugar recovery
US6245153B1 (en) 1999-08-28 2001-06-12 Hoy Products, Inc. Method for producing sugar cane juice

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1398252A (en) * 1919-10-16 1921-11-29 Red Cross Mfg Company Cider-press
US1451164A (en) * 1920-05-10 1923-04-10 Fulton Iron Works Company Cane-crushing apparatus
US1482005A (en) * 1922-11-13 1924-01-29 Giordano Francesco Fruit grinder
US1688905A (en) * 1927-08-30 1928-10-23 Vazcane Process Inc Apparatus for simultaneously making sugar and paper pulp from cane
FR2050660A5 (en) * 1969-06-20 1971-04-02 Fives Lille Cail Sugar extraction from sugar cane
US3695931A (en) * 1970-03-31 1972-10-03 Thomas M Hamill Wet milling extraction process and apparatus therefor
US4043832A (en) * 1972-03-08 1977-08-23 Cf&I Engineers, Inc. Apparatus for extracting substances from fibrous materials
FR2198995A1 (en) * 1972-09-13 1974-04-05 Neuville Paul Extraction of sugar from crushed pulverized cane - by diffusion and leaching with liquid flowing down through floating beds compressed by immersion
US3976498A (en) * 1972-11-09 1976-08-24 Canadian Cane Equipment Ltd. Sugarcane separation

Also Published As

Publication number Publication date
DE3664786D1 (en) 1989-09-07
FR2587363A1 (fr) 1987-03-20
US4804418A (en) 1989-02-14
FR2587363B1 (fr) 1988-01-08
EP0217238A1 (de) 1987-04-08
ATE45186T1 (de) 1989-08-15

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