FR2602154A1 - Feeding device for a continuously operating crystalliser - Google Patents

Feeding device for a continuously operating crystalliser Download PDF

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Publication number
FR2602154A1
FR2602154A1 FR8611192A FR8611192A FR2602154A1 FR 2602154 A1 FR2602154 A1 FR 2602154A1 FR 8611192 A FR8611192 A FR 8611192A FR 8611192 A FR8611192 A FR 8611192A FR 2602154 A1 FR2602154 A1 FR 2602154A1
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Prior art keywords
partition
compartments
nozzle
axis
produces
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Granted
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FR8611192A
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French (fr)
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FR2602154B1 (en
Inventor
Gerard Journet
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Fives Cail Babcock SA
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Fives Cail Babcock SA
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Priority to FR8611192A priority Critical patent/FR2602154B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0018—Evaporation of components of the mixture to be separated
    • B01D9/0031—Evaporation of components of the mixture to be separated by heating

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Extraction Or Liquid Replacement (AREA)

Abstract

Feeding device for a continuously operating crystalliser, consisting of a vessel 20 divided by vertical partitions 24 into a plurality of compartments through which the mass passes in succession as it crystallises and into which an undersaturated solution of the product to be crystallised is introduced. To allow the feeding of two compartments with undersaturated solution by means of a single rotary dispenser while ensuring effective washing of the partition separating them, a rotary distributor is placed above the partition 24, and is equipped with a first nozzle 38 which produces a narrow jet spraying the upper part of the walls of the said compartments other than the said partition, and with a second nozzle 42 which produces a wide, conically shaped jet which sprays the upper part of the said partition, on both its faces.

Description

La présente invention concerne les appareils de cristallisation à marche continue divisés par des cloisons verticales en une pluralité de compartiments qui sont traversés successivement par la masse en cours de cristallisation et dans lesquels on introduit une solution sous-saturée du produit à cristalliser pour maintenir la liqueur-mère de ladite masse en état de sursaturation. The present invention relates to continuous-running crystallization apparatus divided by vertical partitions into a plurality of compartments which are successively crossed by the mass during crystallization and into which an undersaturated solution of the product to be crystallized is introduced to maintain the liquor mother of said mass in a state of supersaturation.

Dans ces appareils, les cristaux produits peuvent former sur les parties non immergées des parois et des cloisons de séparation des dépits nuisibles au bon fonctionnement de l'appareil et, pour empêcher la formation de ces dépits, les surfaces-old ils sont susceptibles de se former sont arrosées avec la solution sous-saturée alimentant les différents compartiments. Pour cela on utilise, en particulier, des distributeurs rotatifs placés au centre des compartiments et projetant des jets de solution sous-saturée sur la partie supérieure des parois et cloisons délimitant les compartiments, sur toute leur périphérie. In these devices, the crystals produced can form on the non-submerged parts of the walls and partitions of the particles detrimental to the proper functioning of the device and, to prevent the formation of these particles, the surfaces-old they are likely to be form are watered with the undersaturated solution feeding the different compartments. For this, use is made in particular of rotary distributors placed in the center of the compartments and projecting jets of undersaturated solution onto the upper part of the walls and partitions delimiting the compartments, over their entire periphery.

Pour produire, avec un appareil de capacité donnée, un grossissement important et des cristaux ayant des dimensions aussi régulières que possible, on a intérêt à augmenter le nombre de compartiments. Cela oblige à augmenter le nombre de distributeurs et, par conséquent, le co,t de l'appareil. Par ailleurs le débit de solution alimentant les premiers compartiments, qui sont les plus petits, risque d'être insuffisant pour assurer un lavage efficace des parois
Le but de la présente invention est de remédier à ces inconvénients en assurant, au moyen d'un seul distributeur rotatif, l'alimentation en solution sous-saturée de deux compartiments adjacents.To produce, with an apparatus of a given capacity, a large magnification and crystals having as regular dimensions as possible, it is advantageous to increase the number of compartments. This requires increasing the number of distributors and, consequently, the cost of the device. In addition, the flow of solution supplying the first compartments, which are the smallest, risks being insufficient to ensure effective washing of the walls.
The object of the present invention is to remedy these drawbacks by ensuring, by means of a single rotary distributor, the supply of undersaturated solution to two adjacent compartments.

Le dispositif d'alimentation objet de l'invention est caractérisé en ce qu'il comporte au moins un distributeur rotatif placé au-dessus de la cloison séparant deux compartiments adjacents et équipé d'une première buse qui produit un jet étroit qui arrose la partie supérieure des parois desdits compartiments autres que ladite cloison et d'une seconde buse qui produit un jet large, en forme de cône, qui arrose la partie supérieure de ladite cloison, sur ses deux faces. The feed device object of the invention is characterized in that it comprises at least one rotary distributor placed above the partition separating two adjacent compartments and equipped with a first nozzle which produces a narrow jet which sprinkles the part upper walls of said compartments other than said partition and a second nozzle which produces a wide jet, cone-shaped, which sprinkles the upper part of said partition, on its two faces.

Selon n mode de réalisation particulier, les axes des buses sont situés dans un même plan contenant 1 'axe de rotation et sont orientés de telle sorte que les jets qu'elles produisent soient diriges en sens inverses, La seconde buse est située près de l'axe de rotation et son axe forme avec celui-ci un angle inférieur à 45 , l'angle au sommet du jet conique qu'elle produit étant d'environ 900.  According to a particular embodiment, the axes of the nozzles are located in the same plane containing the axis of rotation and are oriented so that the jets which they produce are directed in opposite directions. The second nozzle is located near the the axis of rotation and its axis forms with it an angle less than 45, the angle at the top of the conical jet which it produces being approximately 900.

D'autres caractéristiques de l'invention apparaitront å la lecture de la description qui suit et se réfère aux dessins l'accompagnant qui montrent, a titre d'exemple nonlimitatif, un mode de réalisation de l'invention et sur lesquels
La figure 1 est une coupe suivant un plan horizontal (coupe R- de la figure 2) d'un appareil de cristallisation a marche continue concerné par l'invention
La figure 2 est une coupe transversale de l'appareil de la figure 1 ; et
La figure 3 est une coupe, suivant un plan axial, d'une buse produisant un c8ne creux, d'un type connu pouvant être utilisé dans le cadre de cette invention.Other characteristics of the invention will appear on reading the description which follows and refers to the accompanying drawings which show, by way of nonlimiting example, an embodiment of the invention and in which
Figure 1 is a section along a horizontal plane (section R- of Figure 2) of a continuous-running crystallization apparatus concerned with the invention
Figure 2 is a cross section of the apparatus of Figure 1; and
Figure 3 is a section along an axial plane of a nozzle producing a hollow cone, of a known type which can be used in the context of this invention.

L'appareil représenté en plan sur la figure 1 est destiné à la production d'une masse-cuite de sucrerie ; il est constitué par une cuve 20 cylindrique, entièrement fermée, disposée horizontalement. L'intérieur de la cuve est divisé en 15 compartiments par des cloisons verticales longitudinales 22 et transversales 24. Ces cloisons n'atteignent pas le sommet de la cuve, de sorte que tous les compartiments communiquent entre eux à la partie supérieure de la cuve qui est reliée à une source de vide. Des éléments chauffants non représentés, tels que des tubes ou des plaques creuses parcourus par de la vapeur, sont placés dans la partie inférieure des compartiments. The apparatus shown in plan in Figure 1 is intended for the production of a candy mass-cooked; it consists of a cylindrical tank 20, completely closed, arranged horizontally. The interior of the tank is divided into 15 compartments by vertical longitudinal 22 and transverse 24 partitions. These partitions do not reach the top of the tank, so that all the compartments communicate with each other at the top of the tank which is connected to a vacuum source. Heating elements, not shown, such as tubes or hollow plates traversed by steam, are placed in the lower part of the compartments.

Les compartiments 1 à 4 ont des volumes égaux, de même que les compartiments 5 à 8, 9 à 11 et 13, 14, le volume des compartiments de chaque groupe augmentant du premier au dernier. Le dernier compartiment a un volume équivalent a celui des compartiments 13 et 14 mais il n'est-pas limité par une cloison longitudinale en raison du r6le particulier que joue ce compartiment dans la production de la masse-cuite, en particulier vis a vis de l'extraction. Compartments 1 to 4 have equal volumes, as do compartments 5 to 8, 9 to 11 and 13, 14, the volume of the compartments of each group increasing from the first to the last. The last compartment has a volume equivalent to that of compartments 13 and 14 but it is not limited by a longitudinal partition because of the particular role that this compartment plays in the production of the mass-cooked, in particular with respect to extraction.

La solution du produit a cristalliser, qui dans l'exemple décrit est un sirop, et des germes ' de cristallisation sont introduits dans le compartiment 1 et traversent successivement les compartiments 2, 3, 4 ... 15. The solution of the product to be crystallized, which in the example described is a syrup, and seeds of crystallization are introduced into compartment 1 and pass successively through compartments 2, 3, 4 ... 15.

La masse-cuite produite est extraite en continu du compartiment 15. Dans chaque compartiment, les cristaux sont nourris par une solution sous-saturée du produit à cristalliser déversée par des distributeurs rotatifs 26 et 28. Sur la figure 1, ces distributeurs ont été représentés symboliquement - par un cercle dont le diamètre est approximativement proportionnel à leur portée.The mass-cooked product is continuously extracted from compartment 15. In each compartment, the crystals are fed with an undersaturated solution of the product to be crystallized poured out by rotary distributors 26 and 28. In FIG. 1, these distributors have been represented symbolically - by a circle whose diameter is approximately proportional to their range.

Les distributeurs 26 qui sont placés dans les compartiments 13, 14 et 15 sont des appareils connus et constitués par une buse montée a 1 'extrémité d'un tube coudé, engainé en rotation autour d'un axe vertical et raccordé par un joint tournant alune tuyauterie d'alimentation en solution sous-saturée, 1 'axe de la buse étant orienté de telle sorte que le jet produit arrose la partie supérieure des cloisons 2, 24 et les zones de la paroi de la cuve située au même niveau. Dans chacun des compartiments 13 et 14 un seul distributeur est placé au centre du compartiment. Dans le compartiment 15, on a utilisé deux distributeurs de portée plus faible. The distributors 26 which are placed in the compartments 13, 14 and 15 are known devices and consist of a nozzle mounted at the end of a bent tube, sheathed in rotation about a vertical axis and connected by a rotating alune joint supply piping for undersaturated solution, the axis of the nozzle being oriented so that the jet produced sprinkles the upper part of the partitions 2, 24 and the zones of the wall of the tank situated at the same level. In each of the compartments 13 and 14 a single distributor is placed in the center of the compartment. In compartment 15, two distributors of smaller range were used.

Conformément a l'invention, on utilise, pour alimenter les compartiments 1 à 12, des distributeurs 28 disposés audessus des cloisons de séparation transversales 24 de deux compartiments adjacents, chaque distributeur alimentant deux compartiments. In accordance with the invention, distributors 28 disposed above the transverse partition walls 24 of two adjacent compartments are used to supply the compartments 1 to 12, each distributor supplying two compartments.

Chaque distributeur 28 est constitué par un tube coudé S0 entrainé en rotation autour d'un axe vertical 31 situé dans le plan de la cloison par un moteur 32 placé sur la cuve. Le tube 30 est raccordé à une tuyauterie d'alimentation 34 par l'intermédiaire d'un joint tournant 36 qui assure aussi 1 'étanchéité a la traversée de la paroi de la cuve. Une buse 38 est montée à îl'extrémité du tube 30 ; son axe qui s'appuie sur l'axe de rotation 31 est légèrement incliné sur l'horizontale, comme on le voit sur la figure 2, de façon à produire un jet étroit qui arrose la partie supérieure des cloisons 22 et 24 et les zones de la paroi de la cuve situées au meme niveau. Au tube 30 est raccordé un bout de tube ou un bossage 40 qui porte a son extrémité une seconde buse 42 produisant un jet creux, en forme de cône, dont l'angle au sommet est d'environ 90O. La buse 42 est située près de 1 'axe de rotation 31 et son axe, qui s'appuie sur l'axe 31, est incliné (angle ), d'environ 45 , de telle sorte que le jet qu'elle produit s'étende depuis l'axe de rotation jusqu'a l'extrémité de la cloison vers laquelle il est dirigé lorsque l'axe de la buse est situé dans le plan de la cloison. Les axes des buses 38 et 42 peuvent être situés ou non dans le même plan vertical.  Each distributor 28 is constituted by a bent tube S0 rotated about a vertical axis 31 located in the plane of the partition by a motor 32 placed on the tank. The tube 30 is connected to a supply pipe 34 by means of a rotating joint 36 which also seals the passage through the wall of the tank. A nozzle 38 is mounted at the end of the tube 30; its axis which rests on the axis of rotation 31 is slightly inclined to the horizontal, as can be seen in FIG. 2, so as to produce a narrow jet which sprinkles the upper part of the partitions 22 and 24 and the zones of the wall of the tank located on the same level. To the tube 30 is connected a tube end or a boss 40 which carries at its end a second nozzle 42 producing a hollow jet, cone-shaped, the apex angle of which is approximately 90 °. The nozzle 42 is located near the axis of rotation 31 and its axis, which rests on the axis 31, is inclined (angle), by about 45, so that the jet which it produces extends from the axis of rotation to the end of the partition towards which it is directed when the axis of the nozzle is located in the plane of the partition. The axes of the nozzles 38 and 42 may or may not be located in the same vertical plane.

Claims (4)

REVENDICATIONS 1. Dispositif d'alimentation pour appareil de'cristallisation à marche continue constitué par une cuve () divisée par des cloisons verticales (22, 24) en une pluralité de compartiments qui sont traversés successivement par la masse en cours de cristallisation et dans lesquels on introduit une solution sous-saturée du produit a cristalliser, caractérisé en ce qu'il comporte au moins un distributeur rotatif (28) placé au-dessus d'une cloison (24) séparant deux compartiments adjacents et équipé. d'une première buse (38), qui produit un jet étroit arrosant la partie supérieure des par-ois desdits compartiments autres que ladite cloison, et d'une seconde buse (42) qui produit un jet large, en forme de cent, qui arrose la partie supérieure de ladite#cloison, sur ses deux faces.1. Feeding device for continuous crystallization apparatus consisting of a tank () divided by vertical partitions (22, 24) into a plurality of compartments which are successively crossed by the mass during crystallization and in which introduces an undersaturated solution of the product to be crystallized, characterized in that it comprises at least one rotary distributor (28) placed above a partition (24) separating two adjacent compartments and equipped. a first nozzle (38), which produces a narrow jet spraying the upper part of the walls of said compartments other than said partition, and a second nozzle (42) which produces a wide jet, in the shape of a cent, which sprinkles the upper part of said # partition, on both sides. 2. Dispositif selon la revendication 1, caractérisé en ce que la seconde buse (42) est située près de l'axe de rotation (31) du distributeur et son axe est incliné de telle sorte que le jet qu'elle produit s'étende depuis ledit axe de rotation jusqu'a ltextrémité de la cloison- vers laquelle le jet est dirigé lorsque l'axe de la dite buse est situé dans le plan de la dite cloison.2. Device according to claim 1, characterized in that the second nozzle (42) is located near the axis of rotation (31) of the dispenser and its axis is inclined so that the jet it produces extends from said axis of rotation to the end of the partition - towards which the jet is directed when the axis of said nozzle is located in the plane of said partition. 3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les axes des deux buses (38, 42) sont situés dans un même plan contenant l'axe de rotation (31) du distributeur et les jets qu'elles produisent sont dirigés en sens inverses. 3. Device according to claim 1 or 2, characterized in that the axes of the two nozzles (38, 42) are located in the same plane containing the axis of rotation (31) of the distributor and the jets they produce are directed in opposite directions. 4. Dispositif selon la revendication l, 2 ou 3, caractéri#sé en ce que la seconde buse (42) produit un jet large en forme de cone creux. 4. Device according to claim l, 2 or 3, characterized in that the second nozzle (42) produces a wide jet in the form of a hollow cone.
FR8611192A 1986-08-01 1986-08-01 SUPPLY DEVICE FOR A CRYSTALLIZATION APPARATUS WITH CONTINUOUS OPERATION Expired FR2602154B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8611192A FR2602154B1 (en) 1986-08-01 1986-08-01 SUPPLY DEVICE FOR A CRYSTALLIZATION APPARATUS WITH CONTINUOUS OPERATION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8611192A FR2602154B1 (en) 1986-08-01 1986-08-01 SUPPLY DEVICE FOR A CRYSTALLIZATION APPARATUS WITH CONTINUOUS OPERATION

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FR2602154A1 true FR2602154A1 (en) 1988-02-05
FR2602154B1 FR2602154B1 (en) 1988-10-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109603683A (en) * 2019-01-17 2019-04-12 威士达半导体科技(张家港)有限公司 Drop tube, adhesive preparation facilities and application

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759796A (en) * 1950-11-13 1956-08-21 Otto Carl Production of sulphate of ammonia
DE1047128B (en) * 1957-08-08 1958-12-18 Maizena Werke G M B H Deutsche Method and device for filling crystallizers with concentrated sugar juices
GB1141639A (en) * 1966-07-28 1969-01-29 Fives Lillie Cail Soc Prevention of encrustation on the internal surfaces of crystallizers of the evaporator type
FR2177536A1 (en) * 1972-03-29 1973-11-09 Fives Lille Cail
FR2213787A1 (en) * 1973-01-17 1974-08-09 Fives Lille Cail Continuous crystalliser for sugar refineries etc. - with programmed delivery of sub-satd. wall-wash soln

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759796A (en) * 1950-11-13 1956-08-21 Otto Carl Production of sulphate of ammonia
DE1047128B (en) * 1957-08-08 1958-12-18 Maizena Werke G M B H Deutsche Method and device for filling crystallizers with concentrated sugar juices
GB1141639A (en) * 1966-07-28 1969-01-29 Fives Lillie Cail Soc Prevention of encrustation on the internal surfaces of crystallizers of the evaporator type
FR2177536A1 (en) * 1972-03-29 1973-11-09 Fives Lille Cail
FR2213787A1 (en) * 1973-01-17 1974-08-09 Fives Lille Cail Continuous crystalliser for sugar refineries etc. - with programmed delivery of sub-satd. wall-wash soln

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109603683A (en) * 2019-01-17 2019-04-12 威士达半导体科技(张家港)有限公司 Drop tube, adhesive preparation facilities and application
CN109603683B (en) * 2019-01-17 2024-04-12 威士达半导体科技(张家港)有限公司 Drip tube, adhesive preparation device and application

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Publication number Publication date
FR2602154B1 (en) 1988-10-07

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