EP2851638A1 - Dryer for clay products - Google Patents

Dryer for clay products Download PDF

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Publication number
EP2851638A1
EP2851638A1 EP14183287.3A EP14183287A EP2851638A1 EP 2851638 A1 EP2851638 A1 EP 2851638A1 EP 14183287 A EP14183287 A EP 14183287A EP 2851638 A1 EP2851638 A1 EP 2851638A1
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EP
European Patent Office
Prior art keywords
tunnel
door
ventilation system
dryer
length
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.)
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Application number
EP14183287.3A
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German (de)
French (fr)
Inventor
Philippe Hatton
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Ceric Technologies
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Ceric Technologies
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Publication of EP2851638A1 publication Critical patent/EP2851638A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/08—Parts thereof
    • F26B25/12—Walls or sides; Doors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/02—Ceramic articles or ceramic semi-finished articles

Definitions

  • the invention relates to a dryer for earth products.
  • Earthen products such as bricks or tiles
  • the earth products from manufacture are placed on frames with wheels moved in a gallery, and subjected to a coaxial air flow to the gallery.
  • a longitudinal-type tunnel-type dryer In a longitudinal-type tunnel-type dryer, the introduction of hot air at the outlet side of the products and the extraction of moist air at the inlet side of the products are carried out at fans that also provide longitudinal flow. These fans are located near the entry and exit areas of the products. This results in certain disadvantages such as leaks to and from the outside of the tunnel, and the difficulty in creating the necessary pressures for the longitudinal flow.
  • This dryer has two superimposed galleries, joined at the end by two vertical wells, and the chassis run in a loop, the lower gallery, the climbing shaft, the upper gallery and the downwell.
  • the ventilation system ensures a good homogeneity of the temperature and humidity conditions in the middle of the drying cycle.
  • This type of dryer has a serious drawback: between the lower gallery and the upper gallery, the earth products keep the same orientation, but the direction of the airflow is reversed. This inversion of the airflow creates significant stresses causing deformations and cracks in the earth products.
  • the document FR 2 940 830 discloses a tunnel type dryer in which the products to be dried are alternately subjected to a longitudinal circulation of air, or to a brewing air circulation.
  • the dryer has a removable door for temporarily isolating an air intake chamber from the drying end.
  • An object of the present invention is to provide a tunnel type dryer avoiding the aforementioned drawbacks and ensuring a mixing of the air flow in the tunnel.
  • the ventilation system is constituted by at least one helical fan.
  • said at least one helical fan is disposed in the lower part of the door.
  • a single door is placed in the tunnel, at a location between 40 and 60% of the length of the tunnel.
  • two doors are placed in the tunnel, one at a location between 20 and 30% of the length of the tunnel, the other at a location between 60 and 80% of the length of the tunnel.
  • three doors are placed in the tunnel at locations distributed along the length of the tunnel, the first between 0% and 30%, the second between 40% and 60%, the third between 70% and 100% , the length of the tunnel.
  • the door is raised to allow each step of progression of the earth products in the tunnel.
  • the ventilation system when the door is raised, the ventilation system is decommissioned.
  • the door is raised in an auxiliary chamber of the tunnel, which communicates with the tunnel through openings spaced from the location of the door, and the ventilation system is kept in service while the door is raised.
  • the dryer 1, of the tunnel type is symbolized by the sole 2 for transporting the charges 3 and the upper slab 4 covering the tunnel.
  • Each load 3 consists of earth products and their support frame.
  • the progress of the loads 3 in the dryer 1 is provided step by step, against the current flow of drying air.
  • a shutter door 5 in the drying zone of the tunnel, there is disposed a shutter door 5, removable, fully integrated into the tunnel, and in which is installed the ventilation system.
  • the door 5 contains at least one helical fan 6 driven by a motor 7.
  • the fan 6 can be driven directly on the motor shaft, or via a transmission 8 as in the embodiment shown in the drawings. In this case, on the one hand the thickness of the door is reduced, on the other hand, the engine is not subject to the atmosphere of the dryer.
  • the ventilation system is installed in the lower part of the door 5, so as to suck and reject the direct longitudinal flow of drying air in the lower zone of the tunnel, which is generally under-ventilated.
  • the height of the drying tunnel is generally limited to 2 m.
  • the door 5 can receive in its lower part a fan helicoid with a diameter of about 1 m.
  • the door 5 can receive several fans 6 juxtaposed.
  • the door 5 may consist of modules assembled to occupy the entire width of the tunnel.
  • the ventilation system (fan 6, motor 7, transmission 8) is accessible for maintenance.
  • the ventilation system is decommissioned.
  • the drying tunnel has a door 5 in its central zone.
  • a vault 9 of limited length which defines an annex chamber 12 of the tunnel.
  • the upper slab 4 has ventilation openings communicating the drying tunnel and the chamber 12.
  • the upstream ventilation openings 10 ensure the suction of air from the tunnel to the chamber 12.
  • the downstream ventilation openings 11 ensure the blowing of air. air from chamber 12 to the tunnel.
  • the openings 10, 11 are spaced from the location of the door 5.
  • the door 5 is down in the tunnel, without interruption of the ventilation. Maintaining the ventilation system in use in the chamber 12 causes turbulence at the upstream and downstream ventilation apertures 11 and a mixing of air around the charges 3, which is useful.
  • the gate 5 is preferably placed in the central zone of the tunnel, for example between 40% and 60% of the length of the tunnel.
  • each of the doors may be used in a layout such as that of the figure 2 , the tunnel being provided with a room annexed to each door.
  • fans are in the tunnel and there is no aeraulic losses; fans are large and can run slower, resulting in improved performance and reduced noise; large fans provide sufficient static pressure.
  • the provision of the ventilation system approximately halfway from the entrance and exit areas of the tunnel provides the following advantages: the static pressure in the entrance and exit zones of the tunnel is close to ambient pressure; the temperature and humidity conditions in the middle of the tunnel run have a good homogeneity; the efficiency of the drying is improved compared with an inlet and / or outlet ventilation system tunnel; the absence of reversal of the flow of drying air avoids the constraints causing the defects of the dried products; the sound of the ventilation system is clearly damped; the mixing of the air flow in the central part of the drying zone improves the quality of the drying; the arrangement of the fans in the lower part of the door ensures good ventilation of the lower tunnel area.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Séchoir (1) pour produits en terre (3), comportant un tunnel (2, 4) avec une zone de séchage dans laquelle circulent les produits en terre (3) dans un sens et un flux d'air dans le sens inverse, la circulation de flux d'air étant assurée par un système de ventilation (6-8), le tunnel (2, 4) comportant au moins une porte (5) d'obturation amovible dans la zone de séchage, le système de ventilation (6-8) étant installé dans ladite porte (5).Dryer (1) for earth products (3), comprising a tunnel (2, 4) with a drying zone in which the earth products (3) circulate in one direction and an air flow in the opposite direction, the air flow circulation being provided by a ventilation system (6-8), the tunnel (2, 4) having at least one door (5) removable shutter in the drying zone, the ventilation system (6). -8) being installed in said door (5).

Description

L'invention concerne un séchoir pour produits en terre.The invention relates to a dryer for earth products.

Les produits en terre, tels que les briques ou les tuiles, sont usuellement soumis à un séchage avant cuisson. A cet effet, les produits en terre venant de fabrication sont placés sur des châssis munis de roues déplacés dans une galerie, et soumis à un flux d'air coaxial à la galerie.Earthen products, such as bricks or tiles, are usually subjected to drying before cooking. For this purpose, the earth products from manufacture are placed on frames with wheels moved in a gallery, and subjected to a coaxial air flow to the gallery.

Dans un séchoir de type tunnel, à flux longitudinal, l'introduction de l'air chaud, du côté de la sortie des produits, et l'extraction de l'air humide, du côté de l'entrée des produits, sont réalisées au moyen de ventilateurs qui assurent également le flux longitudinal. Ces ventilateurs sont disposés à proximité des zones d'entrée et de sortie des produits. Il en résulte certains inconvénients comme les fuites vers, et en provenance de l'extérieur du tunnel, et la difficulté à créer les pressions nécessaires au débit longitudinal.In a longitudinal-type tunnel-type dryer, the introduction of hot air at the outlet side of the products and the extraction of moist air at the inlet side of the products are carried out at fans that also provide longitudinal flow. These fans are located near the entry and exit areas of the products. This results in certain disadvantages such as leaks to and from the outside of the tunnel, and the difficulty in creating the necessary pressures for the longitudinal flow.

Dans un séchoir de type tunnel, le flux d'air a tendance à s'écouler de façon uniforme et le séchage n'est pas aussi efficace sur toutes les faces du produit en terre, car il est difficile d'effectuer un brassage de l'air transversalement au flux principal.In a tunnel type dryer, the airflow tends to flow uniformly and the drying is not as efficient on all sides of the earth product because it is difficult to mix the product. air transversely to the main flow.

Pour éviter ces inconvénients, un séchoir de type Anjou a été mis au point. Ce séchoir comporte deux galeries superposées, réunies en bout par deux puits verticaux, et les châssis parcourent en boucle, la galerie inférieure, le puits de montée, la galerie supérieure et le puits de descente.To avoid these disadvantages, an Anjou type dryer has been developed. This dryer has two superimposed galleries, joined at the end by two vertical wells, and the chassis run in a loop, the lower gallery, the climbing shaft, the upper gallery and the downwell.

A côté du puits de montée est disposé le système de ventilation et l'air parcourt la galerie inférieure dans un sens et la galerie supérieure dans le sens opposé. Le système de ventilation assure une bonne homogénéité des conditions de température et d'humidité en milieu de cycle de séchage. Ce type de séchoir présente un inconvénient sérieux : entre la galerie inférieure et la galerie supérieure, les produits en terre gardent la même orientation, mais la direction du flux d'air s'inverse. Cette inversion du flux d'air crée des contraintes importantes à l'origine de déformations et de fissures des produits en terre.Next to the climbing shaft is the ventilation system and the air runs through the lower gallery in one direction and the upper gallery in the opposite direction. The ventilation system ensures a good homogeneity of the temperature and humidity conditions in the middle of the drying cycle. This type of dryer has a serious drawback: between the lower gallery and the upper gallery, the earth products keep the same orientation, but the direction of the airflow is reversed. This inversion of the airflow creates significant stresses causing deformations and cracks in the earth products.

Le document FR 2 940 830 décrit un séchoir de type tunnel dans lequel les produits à sécher sont soumis en alternance soit à une circulation longitudinale d'air, soit à une circulation d'air de brassage.The document FR 2 940 830 discloses a tunnel type dryer in which the products to be dried are alternately subjected to a longitudinal circulation of air, or to a brewing air circulation.

Le séchoir comporte une porte amovible pour isoler temporairement une chambre d'admission d'air de l'extrémité de séchage.The dryer has a removable door for temporarily isolating an air intake chamber from the drying end.

Un but de la présente invention est de proposer un séchoir de type tunnel évitant les inconvénients précités et assurant un brassage du flux d'air dans le tunnel.An object of the present invention is to provide a tunnel type dryer avoiding the aforementioned drawbacks and ensuring a mixing of the air flow in the tunnel.

L'invention a pour objet un séchoir pour produits en terre, comportant un tunnel avec une zone de séchage dans laquelle circulent les produits en terre dans un sens et un flux d'air dans le sens inverse, la circulation du flux d'air étant assurée par un système de ventilation,le tunnel comportant au moins une porte d'obturation amovible dans la zone de séchage ;

  • caractérisé en ce que le système de ventilation est installé dans ladite porte.
The subject of the invention is a dryer for earth products, comprising a tunnel with a drying zone in which earth products circulate in one direction and an air flow in the opposite direction, the circulation of the air flow being provided by a ventilation system, the tunnel comprising at least one removable closure door in the drying zone;
  • characterized in that the ventilation system is installed in said door.

Avantageusement, le système de ventilation est constitué par au moins un ventilateur hélicoïde.Advantageously, the ventilation system is constituted by at least one helical fan.

De préférence, ledit au moins un ventilateur hélicoïde est disposé dans la partie inférieure de la porte.Preferably, said at least one helical fan is disposed in the lower part of the door.

De manière avantageuse, une seule porte est mise en place dans le tunnel, à un emplacement situé entre 40 et 60 % de la longueur du tunnel.Advantageously, a single door is placed in the tunnel, at a location between 40 and 60% of the length of the tunnel.

Avantageusement, deux portes sont mises en place dans le tunnel, l'une à un emplacement situé entre 20 et 30 % de la longueur du tunnel, l'autre à un emplacement situé entre 60 et 80 % de la longueur du tunnel.Advantageously, two doors are placed in the tunnel, one at a location between 20 and 30% of the length of the tunnel, the other at a location between 60 and 80% of the length of the tunnel.

De manière avantageuse, trois portes sont mises en place dans le tunnel en des emplacements répartis sur la longueur du tunnel, respectivement le premier entre 0% et 30%, le deuxième entre 40% et 60%, le troisième entre 70% et 100%, de la longueur du tunnel.Advantageously, three doors are placed in the tunnel at locations distributed along the length of the tunnel, the first between 0% and 30%, the second between 40% and 60%, the third between 70% and 100% , the length of the tunnel.

De préférence, la porte est soulevée pour autoriser chaque pas de progression des produits en terre dans le tunnel.Preferably, the door is raised to allow each step of progression of the earth products in the tunnel.

De manière avantageuse, lorsque la porte est soulevée, le système de ventilation est mis hors service.Advantageously, when the door is raised, the ventilation system is decommissioned.

Avantageusement, la porte est soulevée dans une chambre annexe du tunnel, qui communique avec le tunnel par des ouvertures espacées de l'emplacement de la porte, et le système de ventilation est maintenu en service alors que la porte est soulevée.Advantageously, the door is raised in an auxiliary chamber of the tunnel, which communicates with the tunnel through openings spaced from the location of the door, and the ventilation system is kept in service while the door is raised.

L'invention est décrite ci-après avec référence aux dessins annexés dans lesquels :

  • la figure 1 représente une vue simplifiée en coupe longitudinale d'un séchoir tunnel selon un premier mode de réalisation de l'invention ;
  • la figure 2 représente une vue simplifiée en coupe longitudinale d'un séchoir tunnel selon un deuxième mode de réalisation de l'invention.
The invention is described below with reference to the accompanying drawings in which:
  • the figure 1 represents a simplified view in longitudinal section of a tunnel dryer according to a first embodiment of the invention;
  • the figure 2 represents a simplified view in longitudinal section of a tunnel dryer according to a second embodiment of the invention.

Le séchoir 1, de type tunnel, est symbolisé par la sole 2 de transport des charges 3 et la dalle supérieure 4 de couverture du tunnel. Chaque charge 3 est constituée de produits en terre et de leur châssis de support. La progression des charges 3 dans le séchoir 1 est assurée pas à pas, à contre-courant du flux d'air de séchage.The dryer 1, of the tunnel type, is symbolized by the sole 2 for transporting the charges 3 and the upper slab 4 covering the tunnel. Each load 3 consists of earth products and their support frame. The progress of the loads 3 in the dryer 1 is provided step by step, against the current flow of drying air.

Dans l'exemple de réalisation des figures, dans la zone de séchage du tunnel, est disposée une porte 5 d'obturation, amovible, totalement intégrée dans le tunnel, et dans laquelle est installé le système de ventilation.In the embodiment of the figures, in the drying zone of the tunnel, there is disposed a shutter door 5, removable, fully integrated into the tunnel, and in which is installed the ventilation system.

La porte 5 contient au moins un ventilateur hélicoïde 6 entraîné par un moteur 7.The door 5 contains at least one helical fan 6 driven by a motor 7.

Le ventilateur 6 peut être entraîné directement sur l'arbre du moteur, ou par l'intermédiaire d'une transmission 8 comme dans l'exemple de réalisation représenté aux dessins. Dans ce cas, d'une part l'épaisseur de la porte est réduite, d'autre part, le moteur n'est pas soumis à l'ambiance du séchoir.The fan 6 can be driven directly on the motor shaft, or via a transmission 8 as in the embodiment shown in the drawings. In this case, on the one hand the thickness of the door is reduced, on the other hand, the engine is not subject to the atmosphere of the dryer.

De préférence, le système de ventilation est installé dans la partie inférieure de la porte 5, de façon à aspirer et rejeter le flux longitudinal direct d'air de séchage dans la zone inférieure du tunnel, qui est généralement sous-ventilée.Preferably, the ventilation system is installed in the lower part of the door 5, so as to suck and reject the direct longitudinal flow of drying air in the lower zone of the tunnel, which is generally under-ventilated.

La hauteur du tunnel de séchage est généralement limitée à 2 m. Ainsi, la porte 5 peut recevoir dans sa partie inférieure un ventilateur hélicoïde d'un diamètre de l'ordre de 1 m. En fonction de la largeur du tunnel, la porte 5 peut recevoir plusieurs ventilateurs 6 juxtaposés. Par ailleurs, la porte 5 peut être constituée de modules assemblés pour occuper toute la largeur du tunnel.The height of the drying tunnel is generally limited to 2 m. Thus, the door 5 can receive in its lower part a fan helicoid with a diameter of about 1 m. Depending on the width of the tunnel, the door 5 can receive several fans 6 juxtaposed. Furthermore, the door 5 may consist of modules assembled to occupy the entire width of the tunnel.

Lorsque la porte 5 est en position basse, elle occupe toute la section du tunnel de séchage. Lorsqu'elle est en position haute, 5', elle libère la section du tunnel pour la progression des charges 3 d'un pas.When the door 5 is in the lower position, it occupies the entire section of the drying tunnel. When in the up position, 5 ', it releases the section of the tunnel for the progression of the charges 3 by one step.

Dans cette position haute de la porte 5, le système de ventilation (ventilateur 6, moteur 7, transmission 8) est accessible pour maintenance.In this high position of the door 5, the ventilation system (fan 6, motor 7, transmission 8) is accessible for maintenance.

Pendant les mouvements de la porte, le système de ventilation est mis hors service.During the movements of the door, the ventilation system is decommissioned.

Dans l'exemple de réalisation de la figure 2, le tunnel de séchage comporte une porte 5 dans sa zone centrale. Au-dessus de la dalle supérieure 4 est disposée une voûte 9 de longueur limitée qui définit une chambre 12 annexe du tunnel. La dalle supérieure 4 comporte des ouvertures de ventilation faisant communiquer le tunnel de séchage et la chambre 12. Les ouvertures de ventilation amont 10 assurent l'aspiration d'air du tunnel vers la chambre 12. Les ouvertures de ventilation aval 11 assurent le soufflage d'air de la chambre 12 vers le tunnel. Les ouvertures 10, 11 sont espacées de l'emplacement de la porte 5.In the exemplary embodiment of the figure 2 the drying tunnel has a door 5 in its central zone. Above the upper slab 4 is disposed a vault 9 of limited length which defines an annex chamber 12 of the tunnel. The upper slab 4 has ventilation openings communicating the drying tunnel and the chamber 12. The upstream ventilation openings 10 ensure the suction of air from the tunnel to the chamber 12. The downstream ventilation openings 11 ensure the blowing of air. air from chamber 12 to the tunnel. The openings 10, 11 are spaced from the location of the door 5.

Dans cet exemple de réalisation, lorsque les charges 3 doivent progresser d'un pas, la porte 5 est levée en position 5', sans interruption de la ventilation.In this embodiment, when the loads 3 must progress by one step, the door 5 is raised in position 5 ', without interruption of the ventilation.

Une fois le pas de progression effectué, la porte 5 est redescendue dans le tunnel, sans interruption de la ventilation. Le fait de maintenir le système de ventilation en service dans la chambre 12 entraîne une turbulence au niveau des ouvertures de ventilation amont 10 et aval 11 et un brassage d'air autour des charges 3, ce qui est utile.Once the step of progression carried out, the door 5 is down in the tunnel, without interruption of the ventilation. Maintaining the ventilation system in use in the chamber 12 causes turbulence at the upstream and downstream ventilation apertures 11 and a mixing of air around the charges 3, which is useful.

La porte 5 est de préférence placée dans la zone centrale du tunnel, par exemple entre 40% et 60% de la longueur du tunnel.The gate 5 is preferably placed in the central zone of the tunnel, for example between 40% and 60% of the length of the tunnel.

Dans le cas de tunnels très longs ou de charges nombreuses ou très denses, il est avantageux de prévoir plusieurs portes telles que celle décrite ci-dessus, réparties sur la longueur du tunnel. Dans le cas de deux portes, l'une est placée entre 20% et 30% de la longueur du tunnel, l'autre entre 60% et 80% de la longueur du tunnel. Dans le cas de trois portes, la première est placée entre 0% et 30%, la deuxième entre 40% et 60%, et la troisième entre 70% et 100% de la longueur du tunnel. La disposition de plusieurs portes permet d'assurer un brassage du flux au niveau de chacune des portes.In the case of very long tunnels or of many or very dense loads, it is advantageous to provide several doors such as the one described above, distributed over the length of the tunnel. In the case of two doors, one is between 20% and 30% of the length of the tunnel, the other between 60% and 80% of the length of the tunnel. In the case of three gates, the first is between 0% and 30%, the second between 40% and 60%, and the third between 70% and 100% of the length of the tunnel. The arrangement of several doors ensures a mixing of the flow at each of the doors.

Par ailleurs, chacune des portes peut être utilisée dans une disposition telle que celle de la figure 2, le tunnel étant muni d'une chambre annexe à chaque porte.In addition, each of the doors may be used in a layout such as that of the figure 2 , the tunnel being provided with a room annexed to each door.

L'utilisation de ventilateurs hélicoïde de grand diamètre présente plusieurs avantages : les ventilateurs sont dans le tunnel et il n'y a pas de pertes aérauliques ; les ventilateurs sont grands et peuvent tourner moins vite, ce qui entraîne une amélioration du rendement et une diminution du bruit ; les grands ventilateurs permettent de disposer d'une pression statique suffisante.The use of large diameter helical fans has several advantages: the fans are in the tunnel and there is no aeraulic losses; fans are large and can run slower, resulting in improved performance and reduced noise; large fans provide sufficient static pressure.

La disposition du système de ventilation approximativement à mi-distance des zones d'entrée et de sortie du tunnel procure les avantages suivants : la pression statique dans les zones d'entrée et de sortie du tunnel est proche de la pression ambiante ; les conditions de température et d'humidité en milieu de parcours du tunnel présentent une bonne homogénéité ; l'efficacité du séchage est améliorée par rapport à un tunnel à système de ventilation en entrée et/ou en sortie ; l'absence d'inversion de sens du flux d'air de séchage évite les contraintes à l'origine de défauts des produits séchés ; le bruit du système de ventilation est nettement amorti ; le brassage du flux d'air dans la partie centrale de la zone de séchage, améliore la qualité du séchage ; la disposition des ventilateurs en partie inférieure de la porte assure une bonne ventilation de la zone inférieure du tunnel.The provision of the ventilation system approximately halfway from the entrance and exit areas of the tunnel provides the following advantages: the static pressure in the entrance and exit zones of the tunnel is close to ambient pressure; the temperature and humidity conditions in the middle of the tunnel run have a good homogeneity; the efficiency of the drying is improved compared with an inlet and / or outlet ventilation system tunnel; the absence of reversal of the flow of drying air avoids the constraints causing the defects of the dried products; the sound of the ventilation system is clearly damped; the mixing of the air flow in the central part of the drying zone improves the quality of the drying; the arrangement of the fans in the lower part of the door ensures good ventilation of the lower tunnel area.

Claims (9)

Séchoir pour produits en terre, comportant un tunnel avec une zone de séchage dans laquelle circulent les produits en terre dans un sens et un flux d'air dans le sens inverse, la circulation de flux d'air étant assurée par un système de ventilation,le tunnel comportant au moins une porte (5) d'obturation amovible dans la zone de séchage ;
caractérisé en ce que le système de ventilation est installé dans ladite porte (5).Dryer for earth products, comprising a tunnel with a drying zone in which earth products circulate in one direction and a flow of air in the opposite direction, the flow of air flow being ensured by a ventilation system, the tunnel comprising at least one door (5) removable shutter in the drying zone;
characterized in that the ventilation system is installed in said door (5). Séchoir selon la revendication 1, caractérisé en ce que le système de ventilation est constitué par au moins un ventilateur hélicoïde (6).Dryer according to claim 1, characterized in that the ventilation system consists of at least one helical fan (6). Séchoir selon la revendication 2, caractérisé en ce que ledit au moins un ventilateur hélicoïde (6) est disposé dans la partie inférieure de la porte (5).Dryer according to claim 2, characterized in that said at least one helical fan (6) is arranged in the lower part of the door (5). Séchoir selon la revendication 1, caractérisé en ce qu'une seule porte (5) est mise en place dans le tunnel, à un emplacement situé entre 40 et 60 % de la longueur du tunnel.Dryer according to claim 1, characterized in that a single door (5) is placed in the tunnel at a location between 40 and 60% of the length of the tunnel. Séchoir selon la revendication 1, caractérisé en ce que deux portes (5) sont mises en place dans le tunnel, l'une à un emplacement situé entre 20 et 30 % de la longueur du tunnel, l'autre à un emplacement situé entre 60 et 80 % de la longueur du tunnel.Drier according to claim 1, characterized in that two doors (5) are arranged in the tunnel, one at a location between 20 and 30% of the length of the tunnel, the other at a location between 60 and 80% of the length of the tunnel. Séchoir selon la revendication 1, caractérisé en ce que trois portes (5) sont mises en place dans le tunnel, en des emplacements répartis sur la longueur du tunnel, respectivement le premier entre 0% et 30%, le deuxième entre 40% et 60%, le troisième entre 70% et 100% , de la longueur du tunnel.Drier according to claim 1, characterized in that three doors (5) are arranged in the tunnel at locations distributed along the length of the tunnel, the first between 0% and 30%, the second between 40% and 60%. %, the third between 70% and 100%, of the length of the tunnel. Séchoir selon la revendication 1, caractérisé en ce que la porte (5) est soulevée pour autoriser chaque pas de progression des produits en terre dans le tunnel.Dryer according to claim 1, characterized in that the door (5) is raised to allow each step of progression of the earth products in the tunnel. Séchoir selon la revendication 7, caractérisé en ce que lorsque la porte (5) est soulevée, le système de ventilation est mis hors service.Dryer according to claim 7, characterized in that when the door (5) is raised, the ventilation system is switched off. Séchoir selon la revendication 7, caractérisé en ce que la porte (5) est soulevée dans une chambre (12) annexe du tunnel, qui communique avec le tunnel par des ouvertures (10, 11) espacées de l'emplacement de la porte (5), et le système de ventilation est maintenu en service alors que la porte (5) est soulevée.Dryer according to claim 7, characterized in that the door (5) is raised in an annex chamber (12) of the tunnel, which communicates with the tunnel through openings (10, 11) spaced from the location of the door (5), and the ventilation system is kept in service while the door (5) is lifted.
EP14183287.3A 2013-09-24 2014-09-02 Dryer for clay products Withdrawn EP2851638A1 (en)

Applications Claiming Priority (1)

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FR1359161A FR3011070B1 (en) 2013-09-24 2013-09-24 DRYER FOR EARTH PRODUCTS

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EP2851638A1 true EP2851638A1 (en) 2015-03-25

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EP (1) EP2851638A1 (en)
FR (1) FR3011070B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3040775A1 (en) * 2015-09-08 2017-03-10 Seipia CONTINUOUS FIRE TUNNEL FURNACE FOR CERAMIC PRODUCTS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107449222B (en) * 2017-08-31 2023-06-20 贵州大学 Sectional type advection smoke discharging drying device and drying method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344531A1 (en) * 1993-12-24 1995-06-29 Werner Strohmenger Drying appts. for ceramic prods.
FR2940830A1 (en) 2009-01-08 2010-07-09 Keyria Ventilating method for drying raw and humid products to fabricate e.g. bricks, in terracotta industry, involves allowing products to be subjected to longitudinal circulation of air/circulation of agitating air, during product displacement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344531A1 (en) * 1993-12-24 1995-06-29 Werner Strohmenger Drying appts. for ceramic prods.
FR2940830A1 (en) 2009-01-08 2010-07-09 Keyria Ventilating method for drying raw and humid products to fabricate e.g. bricks, in terracotta industry, involves allowing products to be subjected to longitudinal circulation of air/circulation of agitating air, during product displacement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3040775A1 (en) * 2015-09-08 2017-03-10 Seipia CONTINUOUS FIRE TUNNEL FURNACE FOR CERAMIC PRODUCTS

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FR3011070A1 (en) 2015-03-27

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