EP0047680A1 - Planetary cooler for a rotary kiln - Google Patents

Planetary cooler for a rotary kiln Download PDF

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Publication number
EP0047680A1
EP0047680A1 EP81401192A EP81401192A EP0047680A1 EP 0047680 A1 EP0047680 A1 EP 0047680A1 EP 81401192 A EP81401192 A EP 81401192A EP 81401192 A EP81401192 A EP 81401192A EP 0047680 A1 EP0047680 A1 EP 0047680A1
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EP
European Patent Office
Prior art keywords
tube
oven
partition
upstream
propeller
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Withdrawn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
EP81401192A
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German (de)
French (fr)
Inventor
Roland Rizzato
René Mazencieux
José Sanzey
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
Publication of EP0047680A1 publication Critical patent/EP0047680A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices
    • F27B7/40—Planetary coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge

Definitions

  • the present invention relates to planetary coolers constituted by a series of tubes mounted in satellite around an oven for cooling the materials leaving the oven, each tube being connected to an outlet opening of the oven by a communication chute.
  • the hot material falls, through the outlet openings and the communication troughs, into the cooling tubes when they come in the low position. Air is sucked or blown into the tubes, against the flow of the hot material, to cool it, and enters the furnace through the outlet openings.
  • the heat exchanges take place essentially by conduction at the level of the free face of the embankment of materials; although this face is constantly renewed, thanks to the rotation of the tubes, the heat exchanges are low.
  • each tube is divided into two compartments by a partition situated in a diametral plane and whose upstream end, considering the direction of circulation of the hot material, is distant from the communication chute, and in its part located immediately upstream of the partition, the wall of each tube is provided with two parallel helices, offset by 180 ° and delimiting two corridors each opening into a compartment, these two corridors communicating with each other by regularly spaced openings over their entire length and allowing the passage of material from one corridor to another and only from upstream to downstream.
  • These propellers can advantageously be formed from a series of elements arranged in the manner of louvers, so as to form between them openings making the corridors communicate.
  • the inlet end of the tubes is closed by an inclined bottom and provided with at least one propeller to large step which moves the material downstream during the upward stroke of the tubes.
  • a sheet whose plane is substantially parallel to that defined by the axes of the tube and its chute is placed near the rear edge, considering the direction of rotation of the furnace, the latter and fixed to the wall of the tube, to its bottom and to the propeller to form a pocket where the material which has not been evacuated by the propeller is retained during the upward travel and part of the downward travel of the tube; the propeller ends at a certain distance from the bottom to allow material near the bottom to enter this pocket.
  • the compartments are provided with propeller sections fixed on their cylindrical wall and blades fixed on the partition which ensure the movement of the material towards the outlet of the tubes.
  • these propellers are formed of a series of elements arranged in the manner of louvers and the elements located near the partition have a height greater than that of the other elements.
  • the reference number 10 designates a rotary tubular oven used for the heat treatment of a material moving from one end to the other under the effect of the slope and of the rotation of the oven.
  • the oven carries a series of cooler tubes 12 arranged in satellites at its periphery and connected to the oven by chutes 14; a single tube has been shown in Figures 1 and 2.
  • the hot material falls from the oven into the cooler tubes, when these are in the low position, through openings in the wall of the oven and to which the ducts are connected. In the cooling tubes, the material moves in the opposite direction to a stream of fresh air which then enters the oven.
  • Each cooling tube is constituted by a ferrule tone metal with circular section. Its upstream end adjacent to the chute, is closed by an inclined bottom 16, placed under the chute so that the hot material falling from the oven when the tube is in the low position slides on this bottom and is moved away from its point of fall. the other end of the tube is partially closed by a notched disc 18 which leaves an outlet opening 20. At this same end, an opening 22 is cut in the shell; this opening occupies approximately the same angular position as the opening 20 and is provided with a grid 24 forming a screen. The fine particles of the material passing through this grid are discharged through the opening 22, while the rejects are discharged through the opening 20.
  • the upstream end of the cooler tube which receives the hot material falling from the oven is provided with an inner jacket 26 to prevent this part of the shell and the bottom 16 from being subjected to excessive thermal stresses.
  • Two large pitch propellers 28 are fixed on the jacket 26; their role is to separate the material from the bottom 16, during the upward stroke of the tubes to prevent it from falling back into the furnace when the tubes are in the high position.
  • a sheet 30 ( Figure 2) whose plane is substantially parallel to that defined by the axes of the tube and the chute is placed at the rear, considering the direction of rotation of the oven indicated by an arrow in Figure 2, the chute and near the edge of it. It is fixed to the jacket 26 and to the adjacent propeller 28 so as to form a pocket 32 where the material which has not been spread by the propellers 28 is housed when the cooling tube is in the upper part of its race; this prevents this material from falling back into the oven when the tube is in the high position.
  • the propeller 28 to which the sheet 30 is fixed ends at a certain distance from the bottom 16, as can be seen in FIG. 4, so as to provide a passage 33 allowing the material being in this zone, to the before the propeller, to enter the pocket 32. If the propeller extended to the bottom 16, a certain volume of material could accumulate on the propeller in this area and then fall back into the oven.
  • the downstream part of the cooling tube is divided into two semi-cylindrical compartments by a diametrical partition 34.
  • Each compartment is provided with organs ensuring the progression of the material.
  • organs are constituted by inclined blades 36 fixed on the partition 34 and by blades 38 fixed on the ferrule of the tube and arranged in the manner of louvers along several propellers; as seen in Figure 3, the blades 38 located near the partition are higher than the others to prevent the material that accumulates in these areas for certain positions of the tube from falling back overflowing over the blades .
  • the tube is provided with two propellers 40, parallel and offset by 180 °.
  • These propellers are formed of a series of elements arranged in the manner of louvers and fixed on the ferrule. They delimit two corridors42 and 44 each leading to a compartment. The role of these propellers is to distribute equally between the two compartments the material which is brought to them by the propellers 28.
  • the elements of the propellers 40 are arranged so as to make the two corridors communicate by means of openings regularly spaced along their entire length and allow the passage of material from one corridor to another only from upstream to downstream. Thus, if one of the lanes is overloaded, the material will pass into the other lane so that when they exit the material flows introduced into the two compartments will be substantially equal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention relates to planetary coolers for rotary tubular kilns, said coolers comprising a series of tubes mounted in satellite arrangement around the kiln and connected to openings in the latter by spouts. In order to increase the effectiveness of the cooling tubes their downstream part, referring to the direction of circulation of the material, is divided into two compartments by a partition (34) situated in a diametral plane, and in order to ensure regular feeding of the two compartments the wall of each tube is provided, upstream of the partition, with two parallel helices (40) offset by 180 degree and delimiting two corridors (42 and 44), each of which leads into one compartment. <IMAGE>

Description

La présente invention se rapporte aux refroidisseurs planétaires constitués par une série de tubes montés en satellite autour d'un four pour refroidir les matières sortant du four, chaque tube étant raccordé à une ouverture de sortie du four par une goulotte de communication.The present invention relates to planetary coolers constituted by a series of tubes mounted in satellite around an oven for cooling the materials leaving the oven, each tube being connected to an outlet opening of the oven by a communication chute.

Pendant la rotation du four, la matière chaude tombe, à travers les ouvertures de sortie et les goulottes de communication, dans les tubes refroidisseurs lorsqu'ils viennent en position basse. De l'air est aspiré ou insufflé dans les tubes, à contre-courant par rapport à la matière chaude, pour la refroidir, et pénètre dans le four par les ouvertures de sortie.During the rotation of the oven, the hot material falls, through the outlet openings and the communication troughs, into the cooling tubes when they come in the low position. Air is sucked or blown into the tubes, against the flow of the hot material, to cool it, and enters the furnace through the outlet openings.

Dans les tubes refroidisseurs les échanges thermiques s'effectuent essentiellement par conduction au niveau de la face libre du talus de matières ; bien que cette face se renouvelle constamment, grâce à la rotation des tubes, les échanges thermiques sont faibles. Pour les augmenter on a proposé d'équiper les tubes de releveurs qui soulèvent la matière et la font retomber en pluie dans le courant d'air. Cette solution est inutilisable quand la matière comporte des particules fines car celles-ci sont entraînées par l'air et ramenées dans le four.In the cooling tubes, the heat exchanges take place essentially by conduction at the level of the free face of the embankment of materials; although this face is constantly renewed, thanks to the rotation of the tubes, the heat exchanges are low. To increase them, it has been proposed to equip the lift tubes which lift the material and cause it to fall in rain in the air stream. This solution cannot be used when the material contains fine particles because these are entrained by air and brought back into the oven.

Une autre solution, pour augmenter l'efficacité des tubes refroidisseurs, consiste à les diviser en plusieurs compartiments par des cloisons longitudinales. Mais on rencontre alors des difficultés pour répartir la matière entre les différents compartiments et y admettre des débits sensiblement égaux.Another solution, to increase the efficiency of the cooling tubes, consists in dividing them into several compartments by longitudinal partitions. But there are then difficulties in distributing the material between the different compartments and admitting substantially equal flow rates.

C'est ce problème que la présente invention se propose de résoudre.It is this problem that the present invention proposes to solve.

La présente invention a pour objet un refroidisseur planétaire, caractérisé en ce que chaque tube est divisé en deux compartiments par une cloison située dans un plan diamétral et dont l'extrémité amont, en considérant le sens de circulation de la matière chaude, est éloignée de la goulotte de communication, et dans sa partie située immédiatement en amont de la cloison la paroi de chaque tube est munie de deux hélices parallèles, décalées de 180° et délimitant deux couloirs débouchant chacun dans un compartiment, ces deux couloirs communiquant entre eux par des ouvertures régulièrement espacées sur toute leur longueur et autorisant le passage de la matière d'un couloir à l'autre et uniquement de l'amont vers l'aval. Ces hélices peuvent être formées avantageusement d'une série d'éléments disposés à la manière de persiennes, de façon à ménager entre eux des ouvertures faisant communiquer les couloirs.The subject of the present invention is a planar cooler shutter, characterized in that each tube is divided into two compartments by a partition situated in a diametral plane and whose upstream end, considering the direction of circulation of the hot material, is distant from the communication chute, and in its part located immediately upstream of the partition, the wall of each tube is provided with two parallel helices, offset by 180 ° and delimiting two corridors each opening into a compartment, these two corridors communicating with each other by regularly spaced openings over their entire length and allowing the passage of material from one corridor to another and only from upstream to downstream. These propellers can advantageously be formed from a series of elements arranged in the manner of louvers, so as to form between them openings making the corridors communicate.

Pour écarter la matière de son point de chute et éviter qu'elle retombe dans le four lorsque les tubes se trouvent en position haute, l'extrémité d'entrée des tubes est fermée par un fond incliné et munie d'au moins une hélice à grand pas qui déplace la matière vers l'aval pendant la course ascendante des tubes. Cette construction, qui est classique, n'évite pas toujours le retour de la matière dans le four.To separate the material from its point of fall and prevent it from falling back into the oven when the tubes are in the high position, the inlet end of the tubes is closed by an inclined bottom and provided with at least one propeller to large step which moves the material downstream during the upward stroke of the tubes. This construction, which is classic, does not always prevent the return of the material in the oven.

Conformément à une autre caractéristique de l'invention, une tôle dont le plan est sensiblement parallèle à celui défini par les axes du tube et de sa goulotte est placée près du bord arrière, en considérant le sens de rotation du four, de cette dernière et fixée à la paroi du tube, à son fond et à l'hélice pour former une poche où la matière qui n'a pas été évacuée par l'hélice est retenue pendant la course ascendante et une partie de la course descendante du tube ; l'hélice se termine à une certaine distance du fond pour permettre à la matière se trouvant près du fond de pénétrer dans cette poche.According to another characteristic of the invention, a sheet whose plane is substantially parallel to that defined by the axes of the tube and its chute is placed near the rear edge, considering the direction of rotation of the furnace, the latter and fixed to the wall of the tube, to its bottom and to the propeller to form a pocket where the material which has not been evacuated by the propeller is retained during the upward travel and part of the downward travel of the tube; the propeller ends at a certain distance from the bottom to allow material near the bottom to enter this pocket.

Conformément à une troisième caractéristique de l'invention, les compartiments sont munis de tronçons d'hélices fixés sur leur paroi cylindrique et de pales fixées sur la cloison qui assurent le déplacement de la matière vers la sortie des tubes. De préférence, ces hélices sont formées d'une série d'éléments disposés à la manière de persiennes et les éléments situés près de la cloison ont une hauteur supérieure à celle des autres éléments.In accordance with a third characteristic of the invention, the compartments are provided with propeller sections fixed on their cylindrical wall and blades fixed on the partition which ensure the movement of the material towards the outlet of the tubes. Preferably, these propellers are formed of a series of elements arranged in the manner of louvers and the elements located near the partition have a height greater than that of the other elements.

D'autres caractéristiques de l'invention apparaîtront à la lecture de la description qui suit et 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 longitudinale d'un tube refroidisseur réalisé conformément à l'invention ; la figure 2 est une coupe transversale suivant l'axe A-A de la figure 1 ; la figure 3 est une coupe transversale suivant l'axe B-B de la figure 1 ; et la figure 4 est une vue développée de l'intérieur du tube refroidisseur.
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 longitudinal sectional view of a cooler tube produced in accordance with the invention; Figure 2 is a cross section along the axis AA of Figure 1; Figure 3 is a cross section along the axis BB of Figure 1; and Figure 4 is a developed view of the interior of the cooler tube.

Sur les figures 1 et 2, le numéro de référence 10 désigne un four tubulaire rotatif utilisé pour le traitement thermique d'une matière se déplaçant d'une extrémité à l'autre sous l'effet de la pente et de la rotation du four. A son extrémité de sortie, représentée partiellement sur les dessins, le four porte une série de tubes refroidisseurs 12 disposés en satellites à sa périphérie et reliés au four par des goulottes 14 ; un seul tube a été représenté sur les figures 1 et 2. La matière chaude tombe du four dans les tubes refroidisseurs, lorsque ceux-ci sont en position basse, à travers des ouvertures ménagées dans la paroi du four et auxquelles les goulottes sont raccordées. Dans les tubes refroidisseurs, la matière se déplace en sens inverse d'un courant d'air frais qui pénètre ensuite dans le four.In FIGS. 1 and 2, the reference number 10 designates a rotary tubular oven used for the heat treatment of a material moving from one end to the other under the effect of the slope and of the rotation of the oven. At its outlet end, partially shown in the drawings, the oven carries a series of cooler tubes 12 arranged in satellites at its periphery and connected to the oven by chutes 14; a single tube has been shown in Figures 1 and 2. The hot material falls from the oven into the cooler tubes, when these are in the low position, through openings in the wall of the oven and to which the ducts are connected. In the cooling tubes, the material moves in the opposite direction to a stream of fresh air which then enters the oven.

Chaque tube refroidisseur est constitué par une virole métallique à section circulaire. Son extrémité amont attenante à la goulotte, est fermée par un fond incliné 16, placé sous la goulotte de telle sorte que la matière chaude tombant du four quand le tube est en position basse glisse sur ce fond et est écartée de son point de chute. l'autre extrémité du tube est fermée partiellement par un disque échancré 18 qui laisse subsister une ouverture de sortie 20. A cette même extrémité, une ouverture 22 est découpée dans la virole ; cette ouverture occupe approximativement la même position angulaire que l'ouverture 20 et est munie d'une grille 24 formant tamis. Les fines particules de la matière passant à travers cette grille sont évacuées par l'ouverture 22, tandis que les refus sont évacués par l'ouverture 20.Each cooling tube is constituted by a ferrule mé metal with circular section. Its upstream end adjacent to the chute, is closed by an inclined bottom 16, placed under the chute so that the hot material falling from the oven when the tube is in the low position slides on this bottom and is moved away from its point of fall. the other end of the tube is partially closed by a notched disc 18 which leaves an outlet opening 20. At this same end, an opening 22 is cut in the shell; this opening occupies approximately the same angular position as the opening 20 and is provided with a grid 24 forming a screen. The fine particles of the material passing through this grid are discharged through the opening 22, while the rejects are discharged through the opening 20.

L'extrémité amont du tube refroidisseur qui reçoit la matière chaude tombant du four est munie d'un chemisage intérieur 26 pour éviter que cette partie de la virole et le fond 16 soient soumis à des contraintes thermiques excessives.The upstream end of the cooler tube which receives the hot material falling from the oven is provided with an inner jacket 26 to prevent this part of the shell and the bottom 16 from being subjected to excessive thermal stresses.

Deux hélices à grand pas 28 sont fixées sur la chemise 26 ; elles ont pour rôle d'écarter la matière du fond 16, pendant la course ascendante des tubes pour éviter qu'elle retombe dans le four lorsque les tubes sont en position haute.Two large pitch propellers 28 are fixed on the jacket 26; their role is to separate the material from the bottom 16, during the upward stroke of the tubes to prevent it from falling back into the furnace when the tubes are in the high position.

Une tôle 30 (figure 2) dont le plan est sensiblement parallèle à celui défini par les axes du tube et de la goulotte est placée à l'arrière, en considérant le sens de rotation du four indiqué par une flèche sur la figure 2, de la goulotte et près du bord de celle-ci. Elle est fixée à la chemise 26 et à l'hélice 28 adjacente de façon à former une poche 32 où vient se loger la matière qui n'a pas été écartée par les hélices 28 lorsque le tube refroidisseur se trouve dans la partie supérieure de sa course ; on évite ainsi que cette matière retombe dans le four quand le tube est en position haute.A sheet 30 (Figure 2) whose plane is substantially parallel to that defined by the axes of the tube and the chute is placed at the rear, considering the direction of rotation of the oven indicated by an arrow in Figure 2, the chute and near the edge of it. It is fixed to the jacket 26 and to the adjacent propeller 28 so as to form a pocket 32 where the material which has not been spread by the propellers 28 is housed when the cooling tube is in the upper part of its race; this prevents this material from falling back into the oven when the tube is in the high position.

L'hélice 28 à laquelle est fixée la tôle 30 se termine à une certaine distance du fond 16, comme on le voit sur la figure 4, de façon à ménager un passage 33 permettant à la matière se trouvant dans cette zone, à l'avant de l'hélice, de pénétrer dans la poche 32. Si l'hélice se prolongeait jusqu'au fond 16, un certain volume de matière pourrait s'accumuler sur l'hélice dans cette zone et retomber ensuite dans le four.The propeller 28 to which the sheet 30 is fixed ends at a certain distance from the bottom 16, as can be seen in FIG. 4, so as to provide a passage 33 allowing the material being in this zone, to the before the propeller, to enter the pocket 32. If the propeller extended to the bottom 16, a certain volume of material could accumulate on the propeller in this area and then fall back into the oven.

La partie aval du tube refroidisseur est divisée en deux compartiments hémicylindriques par une cloison diamétrale 34. Chaque compartiment est muni d'organes assurant la progression de la matière. Ces organes sont constitués par des pales inclinées 36 fixées sur la cloison 34 et par des pales 38 fixées sur la virole du tube et disposées à la manière de persiennes le long de plusieurs hélices ; comme on le voit sur la figure 3, les pales 38 situées près de la cloison sont plus hautes que les autres pour éviter que la matière qui s'accumule dans ces zones pour certaines positions du tube ne reviennent en arrière en débordant par dessus les pales.The downstream part of the cooling tube is divided into two semi-cylindrical compartments by a diametrical partition 34. Each compartment is provided with organs ensuring the progression of the material. These organs are constituted by inclined blades 36 fixed on the partition 34 and by blades 38 fixed on the ferrule of the tube and arranged in the manner of louvers along several propellers; as seen in Figure 3, the blades 38 located near the partition are higher than the others to prevent the material that accumulates in these areas for certain positions of the tube from falling back overflowing over the blades .

Entre les extrémités de la chemise 26 et de la cloison 34 le tube est muni de deux hélices 40, parallèles et décalées de 180°. Ces hélices sont formées d'une série d'éléments disposés à la manière de persiennes et fixées sur la virole. Elles délimitent deux couloirs42 et 44 aboutissant chacun à un compartiment. Le rôle de ces hélices est de répartir également entre les deux compartiments la matière qui leur est amenée par les hélices 28. Comme on le voit sur la figure 4, les éléments des hélices 40 sont disposés de façon à faire communiquer les deux couloirs par des ouvertures régulièrement espacées sur toute leur longueur et permettre le passage de la matière d'un couloir à l'autre uniquement de l'amont vers l'aval. Ainsi, si l'un des couloirs est trop chargé, la matière passera dans l'autre couloir de sorte qu'à leur sortie les débits de matière introduits dans les deux compartiments seront sensiblement égaux.Between the ends of the jacket 26 and of the partition 34 the tube is provided with two propellers 40, parallel and offset by 180 °. These propellers are formed of a series of elements arranged in the manner of louvers and fixed on the ferrule. They delimit two corridors42 and 44 each leading to a compartment. The role of these propellers is to distribute equally between the two compartments the material which is brought to them by the propellers 28. As can be seen in FIG. 4, the elements of the propellers 40 are arranged so as to make the two corridors communicate by means of openings regularly spaced along their entire length and allow the passage of material from one corridor to another only from upstream to downstream. Thus, if one of the lanes is overloaded, the material will pass into the other lane so that when they exit the material flows introduced into the two compartments will be substantially equal.

Il est bien évident que l'invention n'est pas limitée au mode de réalisation décrit ci-dessus et que de nombreuses modifications peuvent y être apportées par la substitution de moyens techniques équivalents sans sortir du cadre de l'inventionIt is obvious that the invention is not limited to the embodiment described above and that numerous modifications can be made to it by the substitution of equivalent technical means without departing from the scope of the invention.

Claims (6)

1. Refroidisseur planétaire pour four tubulaire rotatif (10) constitué par une série de tubes (12) montés en satellite autour du four et raccordés à des ouvertures du four par des goulottes (14), caractérisé en ce que la partie aval, en considérant le sens de circulation de la matière, de chaque tube (12) est divisée en deux compartiments par une cloison (34) située dans un plan diamétral, et en amont de la dite cloison le tube est muni sur sa paroi de deux hélices parallèles (40), décalées de 180° et délimitant deux couloirs (42 et 44) débouchant chacun dans un compartiment, ces deux couloirs communiquant entre eux par des ouvertures régulièrement espacées sur toute leur longueur et autorisant le passage de la matière d'un couloir à l'autre et uniquement de l'amont vers l'aval.1. Planetary cooler for a rotary tubular oven (10) consisting of a series of tubes (12) mounted in satellite around the oven and connected to oven openings by ducts (14), characterized in that the downstream part, considering the direction of flow of the material, each tube (12) is divided into two compartments by a partition (34) located in a diametral plane, and upstream of said partition the tube is provided on its wall with two parallel helices ( 40), offset by 180 ° and delimiting two corridors (42 and 44) each opening into a compartment, these two corridors communicating with each other by regularly spaced openings over their entire length and allowing the passage of material from a corridor to the other and only from upstream to downstream. 2. Refroidisseur selon la revendication 1, caractérisé en ce que les dites hélices (40) sont formées d'une série d'éléments disposés à la manière de persiennes de façon à autoriser le passage de la matière d'un couloir à l'autre uniquement de l'amont vers l'aval.2. Cooler according to claim 1, characterized in that said propellers (40) are formed of a series of elements arranged in the manner of louvers so as to allow the passage of material from one corridor to another only from upstream to downstream. 3. Refroidisseur selon la revendication 1 ou 2, caractérisé en ce que les dits compartiments sont équipés de tronçons d'hélice (38) fixés sur leur paroi cylindrique et de pales (36) fixées sur la cloison (34).3. Cooler according to claim 1 or 2, characterized in that said compartments are equipped with propeller sections (38) fixed on their cylindrical wall and blades (36) fixed on the partition (34). 4. Refroidisseur selon la revendication 3, caractérisé en ce que chaque tronçon d'hélice (38) est formé de plusieurs éléments et les éléments situés près de la cloison (34) ont une hauteur supérieure à celle des autres éléments.4. Cooler according to claim 3, characterized in that each propeller section (38) is formed of several elements and the elements located near the partition (34) have a height greater than that of the other elements. 5. Refroidisseur selon l'une quelconque des revendications 1 à 4, dont chaque tube comporte dans sa partie amont au moins une hélice à grand pas (28) pour écarter la matière de son point de chute pendant la course ascendante du tube, caractérisé en ce qu'une tôle (30) dont le plan est sensiblement parallèle à celui défini par les axes du tube (12) et de sa goulotte (14) est placée près du bord arrière, en considérant le sens de rotation du four, de cette dernière et fixée à la paroi du tube, à son fond (16) et à l'hélice à grand pas (28) pour former une poche (32) où la matière qui n'a pas été évacuée par ladite hélice est retenue lorsque le tube se trouve dans la partie supérieure de sa course.5. Cooler according to any one of claims 1 to 4, each tube of which comprises in its upstream part at least one helix with large pitch (28) to move the material from its point of fall during the upward stroke of the tube, characterized in what a sheet (30) whose plane is sensi clearly parallel to that defined by the axes of the tube (12) and of its chute (14) is placed near the rear edge, considering the direction of rotation of the oven, of the latter and fixed to the wall of the tube, at its bottom. (16) and the large pitch propeller (28) to form a pocket (32) where the material which has not been discharged by said propeller is retained when the tube is in the upper part of its stroke. 6. Refroidisseur selon la revendication 5, caractérisé en ce que l'hélice à grand pas (28) se termine à une certaine distance du font amont (16) du tube.6. Cooler according to claim 5, characterized in that the large pitch propeller (28) ends at a certain distance from the upstream font (16) of the tube.
EP81401192A 1980-09-10 1981-07-24 Planetary cooler for a rotary kiln Withdrawn EP0047680A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8019487 1980-09-10
FR8019487A FR2489947A1 (en) 1980-09-10 1980-09-10 PLANETARY COOLER FOR ROTARY TUBULAR OVEN

Publications (1)

Publication Number Publication Date
EP0047680A1 true EP0047680A1 (en) 1982-03-17

Family

ID=9245787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401192A Withdrawn EP0047680A1 (en) 1980-09-10 1981-07-24 Planetary cooler for a rotary kiln

Country Status (4)

Country Link
EP (1) EP0047680A1 (en)
ES (1) ES8204531A1 (en)
FR (1) FR2489947A1 (en)
OA (1) OA06872A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR705222A (en) * 1930-11-06 1931-06-02 Susset Ets Rotary kiln
US2001258A (en) * 1932-09-13 1935-05-14 Smidth & Co As F L Rotary kiln and cooler
US4131418A (en) * 1977-05-23 1978-12-26 Fuller Company Tube coolers for rotary kilns

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR705222A (en) * 1930-11-06 1931-06-02 Susset Ets Rotary kiln
US2001258A (en) * 1932-09-13 1935-05-14 Smidth & Co As F L Rotary kiln and cooler
US4131418A (en) * 1977-05-23 1978-12-26 Fuller Company Tube coolers for rotary kilns

Also Published As

Publication number Publication date
ES503695A0 (en) 1982-05-16
ES8204531A1 (en) 1982-05-16
FR2489947B1 (en) 1985-05-17
OA06872A (en) 1983-02-28
FR2489947A1 (en) 1982-03-12

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