FR2461754A1 - Continuous heat exchanger for sugar massecuite etc. - uses superimposed tubular spiral coils as both agitators and heat transfer elements - Google Patents

Continuous heat exchanger for sugar massecuite etc. - uses superimposed tubular spiral coils as both agitators and heat transfer elements Download PDF

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Publication number
FR2461754A1
FR2461754A1 FR7918325A FR7918325A FR2461754A1 FR 2461754 A1 FR2461754 A1 FR 2461754A1 FR 7918325 A FR7918325 A FR 7918325A FR 7918325 A FR7918325 A FR 7918325A FR 2461754 A1 FR2461754 A1 FR 2461754A1
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FR
France
Prior art keywords
tank
heat exchanger
spirals
tubes
prod
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.)
Granted
Application number
FR7918325A
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French (fr)
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FR2461754B1 (en
Inventor
Jean-Pierre Georget
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.)
Fives Cail Babcock SA
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Fives Cail Babcock SA
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 Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Priority to FR7918325A priority Critical patent/FR2461754A1/en
Publication of FR2461754A1 publication Critical patent/FR2461754A1/en
Application granted granted Critical
Publication of FR2461754B1 publication Critical patent/FR2461754B1/fr
Granted legal-status Critical Current

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Classifications

    • 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
    • C13B30/02—Crystallisation; Crystallising apparatus
    • C13B30/022—Continuous processes, apparatus therefor
    • C13B30/023—Continuous processes, apparatus therefor having rotatable means for agitation or transportation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/95—Heating or cooling systems using heated or cooled stirrers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
    • F28D11/04—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller performed by a tube or a bundle of tubes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

Heat exchanger is for continuous cooling or warming of fluid prod. which is agitated as it passes through the exchanger. Heat exchanger is of the type comprising a vertical cylindrical vessel with the prod. inlet of outlet at the top and the other at the bottom. Rotary shaft on the vertical axis of the vessel is fitted with radial agitators to stir the prod. and the vessel contains tubular heat exchange elements which contact agitated prod. Agitators now take the form of a set of spaced, superimposed, horizontal, flat spirals of to be through which heating or cooling fluid is passed. The agitator spirals also serve as heat exchange elements. Spirals are pref. piped in series with connectors which lie alternatives close to the vessel wall and close to the shaft. Successive spirals are pref. wound in opposite directions. Heat exchanger is partic. For use in sugar refineries for warming masse-cuite prior to centriforming or cooling Masse-Coite to promote growth of crystals.

Description

La présente invention a pour objet un malaxeur à marche continue constitué par une cuve cylindrique à axe vertical munie d'organes de brassage fixés sur un arbre rotatif disposé suivant l'axe de la cuve et d'éléments d'échange thermique permettant de refroidir ou de réchauffer les produits traités pendant leur séjour dans la cuve. The subject of the present invention is a continuous-motion mixer constituted by a cylindrical tank with a vertical axis provided with stirring members fixed on a rotary shaft arranged along the axis of the tank and with heat exchange elements making it possible to cool or reheat the treated products during their stay in the tank.

Dans les malaxeurs connus de ce type, les éléments d'échange thermique sont constitués par des nappes horizontales de tubes parcourus par un fluide à température convenable, ces nappes étant disposées à différents niveaux, entre les organes de brassage, et fixées à la paroi de la cuve. Le fait de prévoir des organes séparés pour assurer le brassage et l'échange thermique conduit à une construction lourde et coûteuse. Par ailleurs, les organes de brassage sont généralement constitués par des bras radiaux qui créent une agitation importante nuisant à la méthodicité et à l'uniformité du traitement. In known kneaders of this type, the heat exchange elements consist of horizontal plies of tubes traversed by a fluid at a suitable temperature, these plies being arranged at different levels, between the stirring members, and fixed to the wall of tank. The fact of providing separate members to ensure mixing and heat exchange leads to a heavy and expensive construction. Furthermore, the stirring members are generally constituted by radial arms which create significant agitation which adversely affects the methodicity and uniformity of the treatment.

Le but de la présente invention est de remédier à ces inconvénients en utilisant les mêmes organes pour assurer le brassage et les échanges thermiques, ces organes étant conçus pour réaliser une agitation réduite des produits. The object of the present invention is to remedy these drawbacks by using the same members for stirring and heat exchange, these members being designed to achieve reduced agitation of the products.

Le malaxeur objet de l'invention est caractérisé en ce qu'il comporte des nappes horizontales et superposées de tubes enroulés en spirale et fixés sur l'arbre rotatif, ces tubes, qui sont parcourus par un fluide à température convenable, assurant sinultanément le brassage et le refroidissement ou le réchauffage des produits. The mixer object of the invention is characterized in that it comprises horizontal layers and superimposed of tubes wound in a spiral and fixed on the rotary shaft, these tubes, which are traversed by a fluid at a suitable temperature, ensuring simultaneous mixing and cooling or reheating the products.

Cette disposition permet, non seulement de réduire le poids des organes équipant le malaxeur et d'assurer une agitation réduite des produits, mais aussi de diminuer la puissance nécessaire pour assurer la rotation. de l'arbre et d'améliorer les échanges thermiques puisqu'au cours de leur rotation les tubes en spirale balaient la totalité de la section de la cuve. Elle permet en outre d'utiliser des tubes en longueur commercialisée ce qui diminue le travail de préparation et de soudage et les mises au rebut.  This arrangement makes it possible not only to reduce the weight of the members fitted to the mixer and to ensure reduced agitation of the products, but also to reduce the power required to ensure rotation. of the shaft and to improve heat exchange since during their rotation the spiral tubes sweep the entire section of the tank. It also allows the use of length tubes marketed which reduces the preparation and welding work and scrapping.

Les tubes constituant les différentes nappes peuvent être reliés en série, l'entrée du fluide d'échange thermique dans les nappes successives se trouvant alternativement près de l'axe de la cuve et près de sa paroi. De préférence, les sens des spirales de deux nappes successives sont inversés. The tubes constituting the various plies can be connected in series, the inlet of the heat exchange fluid in the successive plies being located alternately near the axis of the tank and near its wall. Preferably, the directions of the spirals of two successive layers are reversed.

Les nappes de tubes sont supportées par des bras radiaux, de faible hauteur et solidaires de l'arbre rotatif. The layers of tubes are supported by radial arms, of low height and integral with the rotary shaft.

Un joint tournant placé à une extrémité de l'arbre permet l'alimentation des tubes en fluide d'échange et ltévacuation de ce dernier. A rotating joint placed at one end of the shaft allows the tubes to be supplied with exchange fluid and evacuation from the latter.

Des bras fixes peuvent être placés entre les nappes pour freiner la rotation des produits dans la cuve. Fixed arms can be placed between the layers to slow down the rotation of the products in the tank.

La description qui suit se réfère aux dessins l'accompagnant qui montrent, à titre d'exemple non limitatif, un mode de réalisation de l'invention et sur lesquels
La figure 1 est une vue en coupe verticale d'un malaxeur réalisé conformément à l'invention ; et
La figure 2 est une vue en coupe horizontale du malaxeur.The following description refers to the accompanying drawings which show, by way of nonlimiting example, an embodiment of the invention and in which
Figure 1 is a vertical sectional view of a mixer made in accordance with the invention; and
Figure 2 is a horizontal sectional view of the mixer.

Le malaxeur représenté sur les dessins est constitué par une cuve cylindrique 10, à section circulaire et disposée verticalement. Des orifices 12 et 14 sont prévus à la partie supérieure et à la partie inférieure de la cuve pour l'admissign des produits à traiter et leur évacuation. The mixer shown in the drawings consists of a cylindrical tank 10, of circular section and arranged vertically. Ports 12 and 14 are provided in the upper part and in the lower part of the tank for the admission of the products to be treated and their evacuation.

Un arbre creux 16 est placé dans l'axe de la cuve il repose à son extrémité inférieure sur une crapaudine 18 fixée sur le fond de la cuve et il est maintenu à son ex trémité supérieure par un palier 20 fixé sur le couvercle de la cuve. Cet arbre est entraîné en rotation par des moyens classiques, non représentés, montés sur le couvercle de la cuve. A hollow shaft 16 is placed in the axis of the tank, it rests at its lower end on a clamp 18 fixed on the bottom of the tank and it is held at its upper end by a bearing 20 fixed on the cover of the tank. . This shaft is rotated by conventional means, not shown, mounted on the cover of the tank.

Des nappes horizontales de tubes 22 sont fixées, à intervalles réguliers, sur l'arbre 16. Chaque nappe est constituée par un tube 24 enroulé en spirale et fixé par des étriers à des bras radiaux 26 soudés sur l'arbre 16 ces bras ont une faible hauteur pour éviter de créer une agitation importante des produits. Les tubes de toutes les nappes sont reliés en série par des raccords 28 situés alternativement près de la paroi de la cuve et près de l'arbre. Les tubes de la première et de la dernière nappe sont reliés à un joint tournant 30 par des tuyauteries placées à l'intérieur de l'arbre 16 ; ce joint permet de faire circuler dans les tubes 24 et 24' un fluide chauffant ou ré frigérant, selon le traitement envisagé.De préférence, les entrées du fluide chauffant ou réfrigérant dans les nappes de tube et du produit à traiter dans la cuve sont situées aux extrémités opposées du malaxeur pour assurer un échange thermique méthodique à contre-courant. Horizontal plies of tubes 22 are fixed at regular intervals to the shaft 16. Each ply consists of a tube 24 wound in a spiral and fixed by stirrups to radial arms 26 welded to the shaft 16 these arms have a low height to avoid creating significant agitation of the products. The tubes of all the layers are connected in series by fittings 28 located alternately near the wall of the tank and near the shaft. The tubes of the first and the last ply are connected to a rotary joint 30 by pipes placed inside the shaft 16; this joint makes it possible to circulate in the tubes 24 and 24 ′ a heating or refrigerating fluid, depending on the treatment envisaged. Preferably, the inlets of the heating or cooling fluid in the layers of tube and of the product to be treated in the tank are located at opposite ends of the mixer to ensure methodical heat exchange against the current.

Sur la figure 2, le tube 24 constituant la nappe située immédiatement au-dessous du plan de coupe a été repré senté en traits pleins et le tube 24' constituant la nappe suivante a été schématisé par un trait mixte. On voit sur cette figure que les sens des spirales de deux nappes successives sont inversés. Cette disposition permet d'assurer un mouvement radial alternatif des produits. Des bras 32 fixés à la paroi de la cuve sont placés entre les nappes leur rôle est de freiner la rotation des produits qui aurait pour effet de diminuer fortement les échanges thermiques. In FIG. 2, the tube 24 constituting the ply located immediately below the cutting plane has been shown in solid lines and the tube 24 'constituting the following ply has been shown diagrammatically by a dashed line. We see in this figure that the directions of the spirals of two successive layers are reversed. This arrangement ensures an alternating radial movement of the products. Arms 32 fixed to the wall of the tank are placed between the sheets their role is to slow down the rotation of the products which would have the effect of greatly reducing heat exchanges.

Ce malaxeur est utilisable en sucrerie soit pour le refroidissement des masses-cuites pour favoriser le grossissement des cristaux de sucre et l'épuisement des eaux-mères, soit pour le réchauffage des masses-cuites en vue dé diminuer leur viscosité avant centrifugation ou pour les désaturer. This mixer can be used in sweets either for the cooling of the cooked-massages to favor the enlargement of the sugar crystals and the exhaustion of the mother liquors, or for the heating of the cooked-massages in order to decrease their viscosity before centrifugation or for desaturate.

Claims (5)

REVENDICATIONS 1. Malaxeur constitué par une cuve à axe vertical munie1. Mixer consisting of a tank with vertical axis provided d'organes de brassage fixés sur un arbre disposé sui of brewing elements fixed on a tree arranged sui vant l'axe de la cuve et d'éléments d'échange thermi vant the axis of the tank and heat exchange elements que permettant de chauffer ou de refroidir les produits that allowing to heat or cool products traités pendant leur séjour dans la cuve, caractérisé treated during their stay in the tank, characterized en ce que les organes de brassage sont constitués par in that the brewing members are constituted by des nappes superposées de tubes enroulés en spirale et overlapping plies of spirally wound tubes and solidaires de l'arbre, ces tubes étant parcourus par integral with the tree, these tubes being traversed by un fluide chauffant ou réfrigérant et constituant aus a heating or cooling fluid and also constituting -si les éléments d'échange thermique. -if the heat exchange elements. 2. Malaxeur selon la revendication 1, caractérisé en ce2. Mixer according to claim 1, characterized in that que les tubes constituant les différentes nappes sont that the tubes constituting the different layers are reliés en série par des raccords situés alternativement connected in series by alternately located fittings près de la paroi de la cuve et près de l'arbre. near the wall of the tank and near the tree. 3. Malaxeur selon la revendication 1 ou 2, caractérisé en3. Mixer according to claim 1 or 2, characterized in ce que les sens des spirales de deux nappes successives what the directions of the spirals of two successive layers sont inverses l'un de l'autre are inverse to each other 4. Malaxeur selon la revendication 1, 2 ou 34 caractérisé4. Mixer according to claim 1, 2 or 34 characterized en ce que chaque nappe est constituée par un seul tube in that each sheet consists of a single tube enroulé en spirale et fixé à des bras radiaux, de faible spirally wound and attached to radial arms, of low hauteur et solidaires de l'arbre. height and integral with the tree. 5. Malaxeur selon la revendication 1, 2, 3 ou 4, caracté5. Mixer according to claim 1, 2, 3 or 4, character risé en ce qu'il comporte, en outre, des bras fixes pla laughed at in that it further comprises fixed arms pla cés entre les nappes de tubes.  between the layers of tubes.
FR7918325A 1979-07-16 1979-07-16 Continuous heat exchanger for sugar massecuite etc. - uses superimposed tubular spiral coils as both agitators and heat transfer elements Granted FR2461754A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7918325A FR2461754A1 (en) 1979-07-16 1979-07-16 Continuous heat exchanger for sugar massecuite etc. - uses superimposed tubular spiral coils as both agitators and heat transfer elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7918325A FR2461754A1 (en) 1979-07-16 1979-07-16 Continuous heat exchanger for sugar massecuite etc. - uses superimposed tubular spiral coils as both agitators and heat transfer elements

Publications (2)

Publication Number Publication Date
FR2461754A1 true FR2461754A1 (en) 1981-02-06
FR2461754B1 FR2461754B1 (en) 1982-08-27

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FR7918325A Granted FR2461754A1 (en) 1979-07-16 1979-07-16 Continuous heat exchanger for sugar massecuite etc. - uses superimposed tubular spiral coils as both agitators and heat transfer elements

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009049391A1 (en) * 2007-10-16 2009-04-23 Dedini S/A Indústrias De Base Process and equipment for sugar crystallization by controlled cooling
FR3030306A1 (en) * 2014-12-17 2016-06-24 Fives Cail Babcock MIXING DEVICE AND THERMAL EXCHANGE

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB332226A (en) * 1929-04-16 1930-07-16 Nikolai Ahlmann Improved process and apparatus for heating or cooling solid substances
GB453966A (en) * 1935-06-06 1936-09-22 Blairs Ltd Improvements in crystallizers suitable for sugar massecuite
GB458882A (en) * 1935-11-15 1936-12-29 Charles Mcneil Improvements in and relating to vacuum pans for boiling sugar and like purposes
FR2132913A5 (en) * 1971-04-01 1972-11-24 Toury Sucrerie De Mixer for treating massecuite - for use in sugar industry
FR2163704A1 (en) * 1971-12-15 1973-07-27 Stord Bartz Industri As
GB1495196A (en) * 1975-10-27 1977-12-14 Bundaberg Foundry Co Ltd Heat exchanger and/or stirrer
FR2381104A1 (en) * 1977-02-18 1978-09-15 Fives Cail Babcock Vertical cylindrical agitated heat exchanger esp. for sugar massecuite - has dilution liq. inlets in external transfer pipes for good dispersion

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB332226A (en) * 1929-04-16 1930-07-16 Nikolai Ahlmann Improved process and apparatus for heating or cooling solid substances
GB453966A (en) * 1935-06-06 1936-09-22 Blairs Ltd Improvements in crystallizers suitable for sugar massecuite
GB458882A (en) * 1935-11-15 1936-12-29 Charles Mcneil Improvements in and relating to vacuum pans for boiling sugar and like purposes
FR2132913A5 (en) * 1971-04-01 1972-11-24 Toury Sucrerie De Mixer for treating massecuite - for use in sugar industry
FR2163704A1 (en) * 1971-12-15 1973-07-27 Stord Bartz Industri As
GB1495196A (en) * 1975-10-27 1977-12-14 Bundaberg Foundry Co Ltd Heat exchanger and/or stirrer
FR2381104A1 (en) * 1977-02-18 1978-09-15 Fives Cail Babcock Vertical cylindrical agitated heat exchanger esp. for sugar massecuite - has dilution liq. inlets in external transfer pipes for good dispersion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009049391A1 (en) * 2007-10-16 2009-04-23 Dedini S/A Indústrias De Base Process and equipment for sugar crystallization by controlled cooling
US8475597B2 (en) 2007-10-16 2013-07-02 Dedini S/A Industrias De Base Process and equipment for sugar crystallization by controlled cooling
FR3030306A1 (en) * 2014-12-17 2016-06-24 Fives Cail Babcock MIXING DEVICE AND THERMAL EXCHANGE

Also Published As

Publication number Publication date
FR2461754B1 (en) 1982-08-27

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