EP2482017A1 - Apparatus for drying products - Google Patents

Apparatus for drying products Download PDF

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Publication number
EP2482017A1
EP2482017A1 EP12152906A EP12152906A EP2482017A1 EP 2482017 A1 EP2482017 A1 EP 2482017A1 EP 12152906 A EP12152906 A EP 12152906A EP 12152906 A EP12152906 A EP 12152906A EP 2482017 A1 EP2482017 A1 EP 2482017A1
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EP
European Patent Office
Prior art keywords
drying
products
installation
module
dryer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12152906A
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German (de)
French (fr)
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EP2482017B1 (en
Inventor
Laurent Savary
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.)
Florette Holding SAS
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Florette SAS
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Publication date
Priority claimed from FR1150732A external-priority patent/FR2971045A1/en
Application filed by Florette SAS filed Critical Florette SAS
Priority to PL12152906T priority Critical patent/PL2482017T3/en
Publication of EP2482017A1 publication Critical patent/EP2482017A1/en
Application granted granted Critical
Publication of EP2482017B1 publication Critical patent/EP2482017B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/16—Drying solid materials or objects by processes not involving the application of heat by contact with sorbent bodies, e.g. absorbent mould; by admixture with sorbent materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
    • F26B17/026—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the material being moved in-between belts which may be perforated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/28—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve, the axis of rotation being in fixed position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/12—Drying solid materials or objects by processes not involving the application of heat by suction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/14—Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringing; by brushing; by wiping

Definitions

  • the invention relates to a drying plant on the surface of products for removing surface moisture, and in particular a plant for drying plant products, semi-finished to remove the surface moisture for the purpose of their packaging, the wet products. flowing through the facility.
  • One of the methods consists of spinning the products in a centrifugal wringer.
  • This method has the advantage of not raising the temperature of the products but the disadvantage of exerting mechanical stresses on the products, and of being feasible only in batches, that is to say discontinuously.
  • This process is not suitable for relatively fragile products because the centrifugal spin undergoes the mechanical stresses products at least partially damaging the fragile parts of the plants, which would deteriorate the appearance, the organoleptic qualities.
  • This method also has the disadvantage of heating, even slightly, the products which must then be cooled again for their conditioning and storage at a temperature generally of the order of 4 ° C and represents a waste of energy.
  • the object of the present invention is to develop an installation for removing surface moisture from flat products irregular, and fragile such as vegetable products leaving a wash, leaving their fragile structure and eliminating quickly and effectively the surface moisture.
  • the drying installation passing the products into the contact zone ensures a high flow rate while protecting the fragile products since the contact zone between the microfiber fringes of the dryer surface and the surface of the products to be dried is a contact virtually without pressure, comparable to a slight touch or touch; this contact is sufficient to absorb the surface moisture of the surface of the products.
  • the absorption is almost instantaneous in the contact zone between the microfibre fringes and the surface of the products.
  • the touch also has the advantage of allowing the fringes to come into cavities or nooks often undercut like those of the wet surface of a plant product such as a piece of salad leaf especially as the
  • the product to be dried is not necessarily flat or does not need to lie flat or lay flat, that is, pressed against the bearing surface. This operation does not involve in any case the intrinsic moisture of the product which, unheated, even weakly, nor subjected to mechanical stresses likely to promote the drying of the product, thus retains all its own moisture and therefore its freshness.
  • the bearing surface is a conveyor belt traveling at the same speed as the dryer belt in the contact zone so that the products do not undergo any friction related to a relative speed in the contact zone since the products pass through.
  • the contact zone at the same tangential velocity as that of the microfiber fringes of the dryer belt. This contact, even very short and short, nevertheless makes it possible to very effectively eliminate the surface moisture.
  • the dryer belt is a removable sleeve carried by a cylinder driven in rotation. This allows the dryer belt to be removed for processing independently of its drying by moisture extraction downstream of the contact zone.
  • the moisture extractor is a perforated cylinder, rotating in contact with the dryer belt to compress it in a compression zone at which the perforated cylinder is connected to a vacuum source for sucking moisture expressed by the dryer belt and contained therein.
  • the drying installation consists of two drying modules, twinned, reciprocally forming the support surface of the relative to each other to define between them a contact zone in which the products to be dried pass. Thanks to the very flexible and deformable structure of the dryer strips, the joining surface of the two strips is not a flat surface similar to a tangent plane but a flexible zone of a certain thickness favoring the flexible hold of the pieces of vegetables that pass. So this Twin-module installation has the advantage of drying both sides of the products simultaneously, while holding the products by simple contact in the gap between the two contact zones of each driven dryer belt.
  • the driven dryer strips of the two twin modules are sleeves mounted on cylinders driven in rotation.
  • flat products, irregular in shape, but fragile, pass in the reduced interval between the cylinders, they are held in all flexibility by microfiber fringes which, by their contact, according to the irregularity of the surfaces and absorb the surface moisture into the recesses of surface irregularities.
  • each drying module is a conveyor belt provided with a microfibre fringe web, the modules being mounted substantially parallel to one another. to the other, a lower module and an upper module above the lower module whose opposite strands define a contact zone in the form of a corridor, and a management facility managing the speed of travel of the conveyor belts, each other than the one defining the drying corridor being equipped with a moisture extractor.
  • belt conveyor drying modules make it possible to have a particularly long contact time between the microfibre fringe web and the surface of the products, which makes drying particularly effective particularly in the case of very tormented products and which can be difficult for drying by very short contact with the microfibre fringe web.
  • the drying corridor Thanks to the length of the contact zone, that is to say the drying corridor, it is easy to adapt the height of the drying corridor to the nature of the products, especially since this adjustment can be done continuous manner and that the strands facing the two conveyor belts with their microfibre fringe web are not necessarily straight but may have a certain inclination, thus modifying the profile of the drying corridor along the path of the products.
  • This variation can be continuous in the increasing or decreasing direction. It can also alternate between phases of growth and decay to promote the change of place of the microfibers relative to the surface of the products.
  • the spacing of the two modules is adjustable to define the height of the drying corridor, which height is not necessarily uniform as indicated.
  • the speed of travel of the conveyor belts is controlled by the management facility.
  • This speed of travel can be the same for both conveyor belts so that the products remain in principle motionless relative to the conveyor belts all along their path in the drying corridor.
  • the speed of the two conveyor belts is different, preferably slightly different, so that each face of the product is subjected to a force, either in the direction of the drive, or in the direction of the restraint, creating by difference a slight relative movement between one or the other or even the two microfiber fringe sheets of the drying module.
  • conveyor belt drying modules are installed in series, either one after the other, or one above the other to achieve a more gradual and gentle drying of products particularly fragile or allowing a large flow of products.
  • it is formed of a succession of elementary installations each consisting of a drying module formed by a conveyor belt equipped with a sheet of microfibre fringes, mounted substantially parallel to each other , a lower module and an upper module above the lower module delimiting with it a drying corridor, and a management facility managing the speed of travel of the conveyor belts of each drying module and a guide for drive the products from the output of a basic installation to the entrance of the next basic installation, these mounted installations in series being placed one after the other or one above the other.
  • the drying installation as defined above allows very efficient drying with simple means of realization and particularly easy maintenance for food applications such as the drying of leaves or pieces of plants.
  • the subject of the invention is a wet-surface drying plant 1, of irregular shape with cavities and asperities, of flat products, such as leaves or pieces of vegetable leaves, fragile and wet products on the surface when they come out of an upstream treatment stage such as the passage in a bath or a watering zone.
  • These products P arrive on a support surface 100 to pass into the drying module 200 of installation.
  • This drying module 200 consists of a dryer surface which, in this example, is a dryer belt 210, driven in the direction of the arrow A, to pass guide cylinders 220, 221 defining the path of the belt and on a support 222 defining with the support surface 100 opposite, a contact zone ZC of the products to be dried P.
  • the dryer strip 210 driven, is a strip lined with a sheet of microfibre fringes 212 which leave freely of the support surface 211 of the band. Downstream of the zone of contact ZC, the band 210 passes on a bearing surface formed by a rotary cylinder 213 to cooperate with a moisture extractor having a suction zone ZA, in the drying interval traversed by the dryer band 210 with microfibre fringes.
  • the belt 210 follows the circulation path through a treatment plant 260, for example an ultraviolet box or a treatment gas diffusion box to eliminate any germs remaining in the band, then the band returns to the contact zone ZC.
  • the moisture extractor 250 is constituted by a perforated cylinder 251, inside which there is a suction chamber 252 delimiting a depression sector 253 at the suction zone ZA of the perforated cylinder 251. next to the pressure roller 213 to put the holes of the perforated cylinder 251 in depression and thus suck the expressed moisture of the microfiber fringe web 212 so that the dryer belt 210 leaves this gap ZA in the dry state.
  • the figure 2 shows another drying installation 1A with a particular embodiment 200A of the drying module 200 of the figure 1 .
  • the driven dryer belt 210A is carried by a cylinder 220A rotated in the direction of arrow A.
  • the general elements already described in FIG. figure 1 are taken up in this embodiment without being represented in the figure 2 .
  • the pressure roll of the suction zone ZA with the moisture extractor 250A is here replaced by the cylinder 220A carrying the sleeve constituting the dryer belt 210A.
  • This sleeve 210A is preferably removably mounted on the cylinder 220A, which can be replaced from time to time for thorough cleaning, for treatment or to replace the sleeve whose fringes 212A are worn.
  • the bearing surface 100A is constituted by a fixed surface.
  • this fixed surface 100A may also be constituted for example by a conveyor belt so that the products to be dried P do not undergo any differential speed in their passage through the contact zone ZC with the driven dryer belt 210A since the tangential speeds will be the same. .
  • the figure 3 shows another embodiment of a product drying installation 1B.
  • This embodiment differs from the previous embodiments in that it consists of two drying modules 200A, 200B, twinned and in particular identical.
  • the bearing surface of one of the modules 200A, 200B is each constituted by the dryer belt 210A, 210B of the other module.
  • the dryer strips 210A, 210B are carried by rotationally driven cylinders 220A, 220B defining between them an interval in which the products P pass.
  • the two modules 200A, 200B are installed symmetrically with respect to a plane vertical median according to the orientation of the figure 3 .
  • the supply of products P is made from a ramp 270 which discharges the products P on the surface of the dryer belt 210A, 210B of one of the cylinders 220A, 220B or directly in the meantime.
  • the products P are smoothly taken by the fringes 212A, 212B more or less brought into relief by the rotational movement of the two cylinders 220A, 220B to pass substantially without pressure in the gap between the two cylinders, with the only contact microfibres fringes webs 212A, 212B which absorb water surface on both sides of the products P.
  • the dried products P leaving the contact area arrive on a conveyor belt 271.
  • FIG 4 another embodiment of a drying plant 1C for flat products with irregular and brittle structure such as leaves or pieces of plant leaves, wet, as for the above facilities, consists of two drying modules 300A, 300B of similar structure, with conveyor belts each provided with a sheet of microfibre fringes.
  • the conveyors are installed face to face in a horizontal or substantially horizontal position in the example shown form a drying corridor CS to receive the products (P) to be dried by transporting them.
  • the operation of the installation 1C is managed by a control unit 10 which manages the drying modules 300A, 300B, the speed of scrolling and drying V1, V2 and other parameters such as the spacing (e) two conveyors defining the interval depending on the nature of the products to be dried. It also controls the operation of the 350A, 350B moisture extractors and 360A, 360B treatment devices of the dryer belt (dryer surface) of each drying module 300A, 300B.
  • a control unit 10 which manages the drying modules 300A, 300B, the speed of scrolling and drying V1, V2 and other parameters such as the spacing (e) two conveyors defining the interval depending on the nature of the products to be dried. It also controls the operation of the 350A, 350B moisture extractors and 360A, 360B treatment devices of the dryer belt (dryer surface) of each drying module 300A, 300B.
  • the upper conveyor belt 300B may be guided and supported by a support or guide 306B for its lower strand from the sides so as to prevent the lower strand from forming an arrow and reducing the height of the CS drying corridor. relying on the products to be dried at the risk of damaging them by partially crushing them.
  • the upper conveyor belt 302B can also be stiffened by transverse bars, whose ends on each side are for example guided by non-detailed rails.
  • the conveyor belt 302B passes over two deflection rollers 303B, 304B, one of which (304B) is equipped with a motor 305B connected to the control unit 10 which controls the speed V2 of the conveyor belt 302B.
  • the return strand of the conveyor belt 302B passes into a moisture extractor 350B constituted by extractor cylinders 351B, 352B and to ensure this cooperation, the return strand is, for example, supported by a plate or other support member 307B. positioned in a suitable position with respect to the extractor rollers 351B, 352B which may have the same structure as the perforated cylinder 250 of the figure 1 .
  • Pressure rollers 311B, 312B cooperate with the extractor rolls.
  • the humidity extractor 350B is equipped with an actuator 353B for controlling a reciprocating movement W of the extractor cylinders 351B, 352B of the pressing rollers 311B, 312B and of the processing installation 360B for a faster action. and more efficient without, however, excluding the operation of the device 350B in a fixed position relative to the conveyor 301B.
  • the installation 1C is equipped with a device 11 for adjusting the height (e) of the drying corridor CS according to the nature of the products to be dried, their thickness in random position, the structure and the fragility of the products. .
  • This setting is useful for a better efficiency of drying while sparing the products to have contact as good as possible with the microfibres without damaging or crushing the products as they pass through the drying corridor.
  • the speed of travel V1, V2 of the two conveyor belts 302A, 302B is chosen according to the nature of the products to be dried.
  • the installation makes it possible to set an even running speed so that the products maintain their position relative to the two conveyor belts for their passage in the drying corridor.
  • the products (P) rub against both the lower band 302A and the upper band 302B.
  • the figure 5 shows in simplified manner an example of a drying installation 1D composed of two parts 1C, 1C 'constituted each of a drying installation according to the figure 4 , mounted one after the other in series, to dry more quickly products with tormented surfaces, retaining a lot of water in hard to reach cavities.
  • the installations 1C, 1C ' are adjustable in height relative to each other so that, depending on the nature of the products, their size and other parameters, it is possible to adjust the output height of the first installation 1C relative to the inlet of the second installation 1C '(or conversely or in combination), and that according to the fall path, statistically the flat products arrive in the inverted position on the lower conveyor inlet of the second installation 1C'.
  • the figure 6 shows very simply another embodiment of a drying installation 1E composed of two parts each formed of a 1C installation 1C 'cooperating with each other in series but arranged one almost above the other. Each of these installations corresponds to the simple installation represented in a more complete way to the figure 4 .
  • the representation of each of the facilities 1C, 1C ' is limited to the essential elements.
  • the products arrive on the lower conveyor of the upper installation 1C and then be transferred to the lower installation 1C ', either by dropping or preferably by a guide receiving the flat products at the outlet of the first installation to guide them if possible to the second installation and taking advantage of this transfer, return the flat products.
  • This reversal can also be promoted or realized by a guide 12 formed by a curved surface, covering the exit of the conveyor belt of the first part of the installation, around the exit cylinder to force products such as sheets or pieces leaves to maintain their relative position in relation to the lower conveyor, and thus arrive in the inverted position under this conveyor.
  • drying modules or the installations of the figures 1 , 4 can be combined.
  • the different facilities are as described in particular for the figure 4 , equipped with a control unit 10 managing the operation of the drying installation in combination with the other parts of a more global installation upstream and downstream.
  • the various installations or plant parts advantageously comprise an adjustment device for adjusting the interval of the drying zone as the height of the drying corridor depending on the nature of the products, their size and their fragility.
  • the present invention applies mainly to the drying of the surface water of plant products such as pieces of salad coming in particular from a washing bath.

Abstract

The apparatus (1) has a drying module (200) comprising a bearing surface (100) receiving wet vegetal products to be dried (P), and a product contact area (ZC) defined between the bearing surface and a drying surface of a drying band (210) wrapped with a web of microfibers fringes (212) in the contact area. A moisture extractor (250) is arranged in a downstream of the contact area along winding direction of the drying surface of the drying band for compressing the drying surface and for sucking moisture from the products.

Description

Domaine de l'inventionField of the invention

L'invention se rapporte à une installation de séchage en surface de produits pour enlever l'humidité superficielle, et en particulier une installation de séchage de produits végétaux, semi-finis pour enlever l'humidité superficielle en vue de leur conditionnement, les produits mouillés circulant à travers l'installation.The invention relates to a drying plant on the surface of products for removing surface moisture, and in particular a plant for drying plant products, semi-finished to remove the surface moisture for the purpose of their packaging, the wet products. flowing through the facility.

Etat de la techniqueState of the art

Il existe actuellement différents procédés et installations de séchage en surface de produits végétaux tels que des feuilles de salade coupées et lavées.There are currently various methods and facilities for surface drying of plant products such as cut and washed salad leaves.

L'un des procédés consiste à essorer les produits dans une essoreuse centrifuge. Ce procédé a l'avantage de ne pas élever la température des produits mais l'inconvénient d'exercer des contraintes mécaniques sur les produits, et de n'être réalisable que par lots, c'est-à-dire de manière discontinue. Ce procédé ne convient pas pour des produits relativement fragiles car l'essorage centrifuge fait subir aux produits des contraintes mécaniques abimant au moins partiellement les parties fragiles des végétaux, ce qui en détériorerait l'aspect, les qualités organoleptiques.One of the methods consists of spinning the products in a centrifugal wringer. This method has the advantage of not raising the temperature of the products but the disadvantage of exerting mechanical stresses on the products, and of being feasible only in batches, that is to say discontinuously. This process is not suitable for relatively fragile products because the centrifugal spin undergoes the mechanical stresses products at least partially damaging the fragile parts of the plants, which would deteriorate the appearance, the organoleptic qualities.

Il existe également un procédé de séchage dans une veine d'air sec et chaud, mais ce procédé qui a l'avantage de ne pas soumettre les produits à des contraintes mécaniques risquant de les abîmer, a l'inconvénient de nécessiter un temps de séjour relativement important, de l'ordre de 20 minutes. Pour que ce procédé puisse s'appliquer de manière continue, les produits doivent séjourner dans l'enceinte de séchage pendant une telle durée, ce qui représente un cheminement long dans l'installation de séchage et donc une installation de volume important.There is also a method of drying in a vein of dry air and hot, but this method which has the advantage of not subjecting the products to mechanical stresses that may damage them, has the disadvantage of requiring a residence time relatively important, of the order of 20 minutes. For this process to be applied continuously, the products must remain in the drying chamber for such a period, which represents a long path in the drying installation and therefore a large volume installation.

Ce procédé a également l'inconvénient de chauffer, même faiblement, les produits qu'il faut ensuite de nouveau refroidir pour leur conditionnement et leur conservation à une température en général de l'ordre de 4°C et représente un gaspillage d'énergie.This method also has the disadvantage of heating, even slightly, the products which must then be cooled again for their conditioning and storage at a temperature generally of the order of 4 ° C and represents a waste of energy.

But de l'inventionPurpose of the invention

La présente invention a pour but de développer une installation pour enlever l'humidité superficielle de produits plats, de forme irrégulière, et fragiles tels que des produits végétaux sortant d'un lavage, en ménageant leur structure fragile et en éliminant rapidement et efficacement l'humidité superficielle.The object of the present invention is to develop an installation for removing surface moisture from flat products irregular, and fragile such as vegetable products leaving a wash, leaving their fragile structure and eliminating quickly and effectively the surface moisture.

Exposé et avantages de l'inventionDescription and advantages of the invention

A cet effet, l'invention a pour objet une installation de séchage de produits tels que des produits végétaux en morceaux, pour leur enlever l'humidité superficielle, cette installation étant caractérisée en ce qu'elle comporte au moins un module de séchage comprenant :

  • une surface d'appui recevant les produits à sécher,
  • une zone de contact des produits à sécher définie entre la surface d'appui et une surface sécheuse garnie d'une nappe de franges de microfibres dans la zone de contact,
  • un extracteur d'humidité après la zone de contact selon le sens de défilement de la bande sécheuse, pour comprimer la surface sécheuse et en aspirer l'humidité.
For this purpose, the subject of the invention is a drying installation for products such as plant products in pieces, for removing the surface moisture thereof, this installation being characterized in that it comprises at least one drying module comprising:
  • a support surface receiving the products to be dried,
  • a contact area of the products to be dried defined between the support surface and a dryer surface lined with a web of microfibre fringes in the contact zone,
  • a moisture extractor after the contact zone in the direction of travel of the dryer belt, to compress the dryer surface and suck the moisture.

L'installation de séchage faisant passer les produits dans la zone de contact permet d'assurer un débit important tout en ménageant les produits fragiles puisque la zone de contact entre les franges de microfibres de la surface sécheuse et la surface des produits à sécher est un contact pratiquement sans pression, assimilable à un léger toucher ou effleurement ; ce contact est suffisant pour absorber l'humidité superficielle de la surface des produits. L'absorption est quasi instantanée dans la zone de contact entre les franges de microfibres et la surface des produits. Le toucher a également l'avantage de permettre aux franges de venir jusque dans les cavités ou recoins souvent en contre-dépouille comme celles de la surface mouillée d'un produit végétal tel qu'un morceau de feuille de salade d'autant plus que le produit à sécher n'est pas nécessairement à plat ou n'a pas besoin de rester à plat ou d'être mis à plat, c'est-à-dire plaqué contre la surface d'appui. Cette opération n'intervient en aucun cas sur l'humidité intrinsèque du produit qui, non chauffé, même faiblement, ni soumis à des contraintes mécaniques risquant de favoriser le dessèchement du produit, conserve ainsi toute son humidité propre et donc sa fraîcheur.The drying installation passing the products into the contact zone ensures a high flow rate while protecting the fragile products since the contact zone between the microfiber fringes of the dryer surface and the surface of the products to be dried is a contact virtually without pressure, comparable to a slight touch or touch; this contact is sufficient to absorb the surface moisture of the surface of the products. The absorption is almost instantaneous in the contact zone between the microfibre fringes and the surface of the products. The touch also has the advantage of allowing the fringes to come into cavities or nooks often undercut like those of the wet surface of a plant product such as a piece of salad leaf especially as the The product to be dried is not necessarily flat or does not need to lie flat or lay flat, that is, pressed against the bearing surface. This operation does not involve in any case the intrinsic moisture of the product which, unheated, even weakly, nor subjected to mechanical stresses likely to promote the drying of the product, thus retains all its own moisture and therefore its freshness.

De façon particulièrement avantageuse, la surface sécheuse est une bande sécheuse. Ainsi :

  • la zone de contact des produits à sécher est définie entre la surface d'appui et une surface sécheuse constituée par une bande garnie d'une nappe de franges de microfibres dans la zone de contact, et
  • l'extracteur d'humidité après la zone de contact selon le sens de défilement de la bande sécheuse pour comprimer la bande sécheuse et en aspirer l'humidité.
Particularly advantageously, the dryer surface is a dryer belt. So :
  • the area of contact of the products to be dried is defined between the support surface and a dryer surface constituted by a strip lined with a sheet of microfibre fringes in the contact zone, and
  • the moisture extractor after the contact zone in the direction of travel of the dryer belt to compress the dryer belt and suck moisture.

De façon avantageuse, la surface d'appui est une bande transporteuse circulant à la même vitesse que la bande sécheuse dans la zone de contact de sorte que les produits ne subissent aucun frottement lié à une vitesse relative dans la zone de contact puisque les produits traversent la zone de contact à la même vitesse tangentielle que celle des franges de microfibres de la bande sécheuse. Ce contact, même très réduit et de courte durée, permet néanmoins d'éliminer très efficacement l'humidité superficielle.Advantageously, the bearing surface is a conveyor belt traveling at the same speed as the dryer belt in the contact zone so that the products do not undergo any friction related to a relative speed in the contact zone since the products pass through. the contact zone at the same tangential velocity as that of the microfiber fringes of the dryer belt. This contact, even very short and short, nevertheless makes it possible to very effectively eliminate the surface moisture.

D'une manière particulièrement avantageuse, la bande sécheuse est un manchon amovible porté par un cylindre entraîné en rotation. Cela permet d'enlever la bande sécheuse pour la traiter indépendamment de son séchage par extraction d'humidité en aval de la zone de contact.In a particularly advantageous manner, the dryer belt is a removable sleeve carried by a cylinder driven in rotation. This allows the dryer belt to be removed for processing independently of its drying by moisture extraction downstream of the contact zone.

Suivant une caractéristique avantageuse, l'extracteur d'humidité est un cylindre perforé, tournant au contact de la bande sécheuse pour la comprimer dans une zone de compression au niveau de laquelle le cylindre perforé est relié à une source de dépression pour aspirer l'humidité exprimée par la bande sécheuse et contenue dans celle-ci.According to an advantageous characteristic, the moisture extractor is a perforated cylinder, rotating in contact with the dryer belt to compress it in a compression zone at which the perforated cylinder is connected to a vacuum source for sucking moisture expressed by the dryer belt and contained therein.

Dans le cas de produits relativement plats tels que des morceaux de légumes sortant d'un bain de lavage, il est particulièrement avantageux que l'installation de séchage se compose de deux modules de séchage, jumelés, constituant réciproquement la surface d'appui de l'un par rapport à l'autre pour définir entre eux une zone de contact dans laquelle passent les produits à sécher. Grâce à la structure très souple et déformable des bandes sécheuses, la surface de jonction des deux bandes n'est pas une surface plane assimilable à un plan tangent mais une zone souple d'une certaine épaisseur favorisant la tenue en souplesse des morceaux de légumes qui passent. Ainsi cette installation à deux modules jumelés a l'avantage de sécher les deux faces des produits, simultanément, tout en tenant les produits par le simple contact dans l'intervalle entre les deux zones de contact de chaque bande sécheuse entraînée.In the case of relatively flat products such as pieces of vegetables leaving a washing bath, it is particularly advantageous that the drying installation consists of two drying modules, twinned, reciprocally forming the support surface of the relative to each other to define between them a contact zone in which the products to be dried pass. Thanks to the very flexible and deformable structure of the dryer strips, the joining surface of the two strips is not a flat surface similar to a tangent plane but a flexible zone of a certain thickness favoring the flexible hold of the pieces of vegetables that pass. So this Twin-module installation has the advantage of drying both sides of the products simultaneously, while holding the products by simple contact in the gap between the two contact zones of each driven dryer belt.

De façon particulièrement avantageuse, les bandes sécheuses entraînées des deux modules jumelés sont des manchons montés sur des cylindres entraînés en rotation. Bien que les produits plats, de forme irrégulière, mais fragiles, passent dans l'intervalle réduit entre les cylindres, ils sont tenus en toute souplesse par des franges de microfibres qui, par leur contact, suivant l'irrégularité des surfaces et absorbent l'humidité superficielle jusque dans les recoins des irrégularités de surface.Particularly advantageously, the driven dryer strips of the two twin modules are sleeves mounted on cylinders driven in rotation. Although flat products, irregular in shape, but fragile, pass in the reduced interval between the cylinders, they are held in all flexibility by microfiber fringes which, by their contact, according to the irregularity of the surfaces and absorb the surface moisture into the recesses of surface irregularities.

Suivant un autre mode de réalisation particulièrement avantageux pour le débit et la rapidité de séchage de produits particulièrement fragiles, chaque module de séchage est un convoyeur à bande transporteuse munie d'une nappe de franges de microfibres, les modules étant montés l'un sensiblement parallèle à l'autre, un module inférieur et un module supérieur au-dessus du module inférieur dont les brins en regard définissent une zone de contact en forme de couloir, et d'une installation de gestion gérant la vitesse de défilement des bandes transporteuses, chaque autre brin que celui définissant le couloir de séchage étant équipé d'un extracteur d'humidité.According to another particularly advantageous embodiment for the flow rate and the speed of drying of particularly fragile products, each drying module is a conveyor belt provided with a microfibre fringe web, the modules being mounted substantially parallel to one another. to the other, a lower module and an upper module above the lower module whose opposite strands define a contact zone in the form of a corridor, and a management facility managing the speed of travel of the conveyor belts, each other than the one defining the drying corridor being equipped with a moisture extractor.

Ces modules de séchage à convoyeurs à bande permettent d'avoir un temps de contact particulièrement long entre la nappe de franges de microfibres et la surface des produits, ce qui permet un séchage particulièrement efficace dans le cas surtout de produits de forme très tourmentée et qui peuvent être difficiles pour un séchage par un contact très bref avec la nappe de franges de microfibres.These belt conveyor drying modules make it possible to have a particularly long contact time between the microfibre fringe web and the surface of the products, which makes drying particularly effective particularly in the case of very tormented products and which can be difficult for drying by very short contact with the microfibre fringe web.

Grâce à la longueur de la zone de contact, c'est-à-dire le couloir de séchage, il est simple d'adapter la hauteur du couloir de séchage à la nature des produits d'autant plus que ce réglage peut se faire de manière continue et que les brins en regard des deux bandes transporteuses avec leur nappe de franges de microfibres ne sont pas nécessairement rectilignes mais peuvent avoir une certaine inclinaison, modifiant ainsi le profil du couloir de séchage le long du parcours des produits.Thanks to the length of the contact zone, that is to say the drying corridor, it is easy to adapt the height of the drying corridor to the nature of the products, especially since this adjustment can be done continuous manner and that the strands facing the two conveyor belts with their microfibre fringe web are not necessarily straight but may have a certain inclination, thus modifying the profile of the drying corridor along the path of the products.

Cette variation peut être continue dans le sens croissant ou décroissant. Elle peut également alterner entre des phases de croissance et de décroissance pour favoriser le changement de place des microfibres par rapport à la surface des produits.This variation can be continuous in the increasing or decreasing direction. It can also alternate between phases of growth and decay to promote the change of place of the microfibers relative to the surface of the products.

Selon l'invention, l'écartement des deux modules est réglable pour définir la hauteur du couloir de séchage, hauteur qui n'est pas nécessairement uniforme comme cela a été indiqué.According to the invention, the spacing of the two modules is adjustable to define the height of the drying corridor, which height is not necessarily uniform as indicated.

Enfin, la vitesse de défilement des bandes transporteuses est commandée par l'installation de gestion. Cette vitesse de défilement peut être la même pour les deux bandes transporteuses de sorte que les produits restent en principe immobiles par rapport aux bandes transporteuses tout au long de leur trajet dans le couloir de séchage. Mais selon une variante, la vitesse des deux bandes transporteuses est différente, de préférence légèrement différente, de sorte que chaque face du produit est soumise à un effort, soit dans le sens de l'entraînement, soit dans le sens de la retenue, créant par différence un léger mouvement relatif entre l'une ou l'autre, voire les deux nappes de franges de microfibres du module de séchage.Finally, the speed of travel of the conveyor belts is controlled by the management facility. This speed of travel can be the same for both conveyor belts so that the products remain in principle motionless relative to the conveyor belts all along their path in the drying corridor. But according to one variant, the speed of the two conveyor belts is different, preferably slightly different, so that each face of the product is subjected to a force, either in the direction of the drive, or in the direction of the restraint, creating by difference a slight relative movement between one or the other or even the two microfiber fringe sheets of the drying module.

Suivant une autre caractéristique avantageuse, plusieurs modules de séchage à bande transporteuse sont installés en série, soit les uns à la suite des autres, soit l'un au-dessus de l'autre pour réaliser un séchage plus progressif et en douceur de produits particulièrement fragiles ou permettant un débit de produits important.According to another advantageous characteristic, several conveyor belt drying modules are installed in series, either one after the other, or one above the other to achieve a more gradual and gentle drying of products particularly fragile or allowing a large flow of products.

De manière avantageuse, elle est formée d'une succession d'installations élémentaires composées chacune d'un module de séchage formé par un convoyeur à bande transporteuse munie d'une nappe de franges de microfibres, montés sensiblement parallèle l'un à l'autre, un module inférieur et un module supérieur au-dessus du module inférieur délimitant avec celui-ci un couloir de séchage, ainsi qu'une installation de gestion gérant la vitesse de défilement des bandes transporteuses de chaque module de séchage ainsi qu'un guide pour conduire les produits de la sortie d'une installation élémentaire à l'entrée de l'installation élémentaire suivante, ces installations montées en série étant placées l'une à la suite de l'autre ou l'une au-dessus de l'autre.Advantageously, it is formed of a succession of elementary installations each consisting of a drying module formed by a conveyor belt equipped with a sheet of microfibre fringes, mounted substantially parallel to each other , a lower module and an upper module above the lower module delimiting with it a drying corridor, and a management facility managing the speed of travel of the conveyor belts of each drying module and a guide for drive the products from the output of a basic installation to the entrance of the next basic installation, these mounted installations in series being placed one after the other or one above the other.

De façon générale, l'installation de séchage telle que définie ci-dessus permet un séchage très efficace avec des moyens de réalisation simples et d'un entretien particulièrement facile pour des applications alimentaires telles que le séchage de feuilles ou de morceaux de végétaux.In general, the drying installation as defined above allows very efficient drying with simple means of realization and particularly easy maintenance for food applications such as the drying of leaves or pieces of plants.

Dessinsdrawings

La présente invention sera décrite ci-après de manière plus détaillée à l'aide d'une installation de séchage de produits plats représentée dans les dessins annexés dans lesquels :

  • la figure 1 est une vue schématique en coupe d'un module de séchage de produits,
  • la figure 2 montre un mode de réalisation particulier du module d'une installation de séchage de produits,
  • la figure 3 est une vue schématique en coupe d'une installation de séchage de produits formée par le jumelage de deux modules de séchage,
  • la figure 4 est une vue schématique d'un autre mode de réalisation d'une installation de séchage formée de deux convoyeurs à bande pour sécher les deux faces des produits,
  • la figure 5 est une vue schématique d'une installation formée de deux parties montées en série et constituées chacune par une installation comme celle de la figure 4, l'une à la suite de l'autre,
  • la figure 6 montre une autre variante d'installations combinées en série avec superposition de deux installations élémentaires comme celles de la figure 4.
The present invention will be described in more detail below with the aid of a flat product drying installation shown in the accompanying drawings in which:
  • the figure 1 is a schematic sectional view of a product drying module,
  • the figure 2 shows a particular embodiment of the module of a product drying installation,
  • the figure 3 is a schematic sectional view of a product drying installation formed by the pairing of two drying modules,
  • the figure 4 is a schematic view of another embodiment of a drying plant formed of two belt conveyors for drying both sides of the products,
  • the figure 5 is a schematic view of an installation formed of two parts connected in series and each constituted by an installation such as that of the figure 4 , one after the other,
  • the figure 6 shows another variant of combined installations in series with superposition of two basic installations such as those of the figure 4 .

Description de modes de réalisation de l'inventionDescription of Embodiments of the Invention

Selon la figure 1, l'invention a pour objet une installation de séchage 1 de la surface mouillée, de forme irrégulière avec des cavités et des aspérités, de produits plats, tels que des feuilles ou morceaux de feuilles de végétaux, produits fragiles et mouillés en surface lorsqu'ils sortent d'une étape de traitement en amont tel que le passage dans un bain ou une zone d'arrosage. Ces produits P arrivent sur une surface d'appui 100 pour passer dans le module de séchage 200 de l'installation. Ce module de séchage 200 se compose d'une surface sécheuse qui, dans cet exemple, est une bande sécheuse 210, entraînée en mouvement dans la direction de la flèche A, pour passer des cylindres de guidage 220, 221 définissant le chemin de la bande et sur un support 222 définissant avec la surface d'appui 100 en regard, une zone de contact ZC des produits à sécher P. La bande sécheuse 210, entraînée, est une bande garnie d'une nappe de franges de microfibres 212 qui partent librement de la surface de support 211 de la bande. En aval de la zone de contact ZC, la bande 210 passe sur une surface d'appui constituée par un cylindre rotatif 213 pour coopérer avec un extracteur d'humidité ayant une zone d'aspiration ZA, dans l'intervalle de séchage traversé par la bande sécheuse 210 garnie de franges à microfibres. Ensuite, la bande 210 suit le chemin de circulation en traversant une installation de traitement 260, par exemple une boîte à ultraviolets ou une boîte de diffusion d'un gaz de traitement pour éliminer les éventuels germes subsistant dans la bande, puis la bande revient dans la zone de contact ZC.According to figure 1 the subject of the invention is a wet-surface drying plant 1, of irregular shape with cavities and asperities, of flat products, such as leaves or pieces of vegetable leaves, fragile and wet products on the surface when they come out of an upstream treatment stage such as the passage in a bath or a watering zone. These products P arrive on a support surface 100 to pass into the drying module 200 of installation. This drying module 200 consists of a dryer surface which, in this example, is a dryer belt 210, driven in the direction of the arrow A, to pass guide cylinders 220, 221 defining the path of the belt and on a support 222 defining with the support surface 100 opposite, a contact zone ZC of the products to be dried P. The dryer strip 210, driven, is a strip lined with a sheet of microfibre fringes 212 which leave freely of the support surface 211 of the band. Downstream of the zone of contact ZC, the band 210 passes on a bearing surface formed by a rotary cylinder 213 to cooperate with a moisture extractor having a suction zone ZA, in the drying interval traversed by the dryer band 210 with microfibre fringes. Next, the belt 210 follows the circulation path through a treatment plant 260, for example an ultraviolet box or a treatment gas diffusion box to eliminate any germs remaining in the band, then the band returns to the contact zone ZC.

L'extracteur d'humidité 250 est constitué par un cylindre perforé 251, rotatif, à l'intérieur duquel se trouve une chambre d'aspiration 252, délimitant un secteur à dépression 253 au niveau de la zone d'aspiration ZA du cylindre perforé 251 en regard du cylindre presseur 213 pour mettre les orifices du cylindre perforé 251 en dépression et aspirer ainsi l'humidité exprimée de la nappe de franges de microfibres 212 de sorte que la bande sécheuse 210 quitte cet intervalle ZA à l'état sec.The moisture extractor 250 is constituted by a perforated cylinder 251, inside which there is a suction chamber 252 delimiting a depression sector 253 at the suction zone ZA of the perforated cylinder 251. next to the pressure roller 213 to put the holes of the perforated cylinder 251 in depression and thus suck the expressed moisture of the microfiber fringe web 212 so that the dryer belt 210 leaves this gap ZA in the dry state.

La figure 2 montre une autre installation de séchage 1A avec un mode de réalisation particulier 200A du module de séchage 200 de la figure 1. Dans ce mode de réalisation 200A, la bande sécheuse 210A entraînée, est portée par un cylindre 220A entraîné en rotation dans le sens de la flèche A. Les éléments généraux déjà décrits à la figure 1 sont repris dans ce mode de réalisation sans être représentés à la figure 2.The figure 2 shows another drying installation 1A with a particular embodiment 200A of the drying module 200 of the figure 1 . In this embodiment 200A, the driven dryer belt 210A is carried by a cylinder 220A rotated in the direction of arrow A. The general elements already described in FIG. figure 1 are taken up in this embodiment without being represented in the figure 2 .

Le cylindre presseur de la zone d'aspiration ZA avec l'extracteur 250A d'humidité est remplacé ici par le cylindre 220A portant le manchon constituant la bande sécheuse 210A. Ce manchon 210A est de préférence monté de manière amovible sur le cylindre 220A, ce qui permet de le remplacer de temps en temps pour un nettoyage approfondi, pour un traitement ou encore pour remplacer le manchon dont les franges 212A sont usées.The pressure roll of the suction zone ZA with the moisture extractor 250A is here replaced by the cylinder 220A carrying the sleeve constituting the dryer belt 210A. This sleeve 210A is preferably removably mounted on the cylinder 220A, which can be replaced from time to time for thorough cleaning, for treatment or to replace the sleeve whose fringes 212A are worn.

Dans cet exemple, la surface d'appui 100A est constituée par une surface fixe. Mais cette surface fixe 100A peut également être constituée par exemple par une bande transporteuse de sorte que les produits à sécher P ne subissent aucune vitesse différentielle dans leur passage dans la zone de contact ZC avec la bande sécheuse 210A entraînée puisque les vitesses tangentielles seront les mêmes.In this example, the bearing surface 100A is constituted by a fixed surface. But this fixed surface 100A may also be constituted for example by a conveyor belt so that the products to be dried P do not undergo any differential speed in their passage through the contact zone ZC with the driven dryer belt 210A since the tangential speeds will be the same. .

La figure 3 montre un autre mode de réalisation d'une installation de séchage 1B de produits. Ce mode de réalisation se distingue des modes de réalisation précédents en ce qu'il se compose de deux modules de séchage 200A, 200B, jumelés et notamment identiques. La surface d'appui de l'un des modules 200A, 200B est chaque fois constituée par la bande sécheuse 210A, 210B de l'autre module. Dans cet exemple particulier, les bandes sécheuses 210A, 210B sont portées par des cylindres 220A, 220B entraînés en rotation définissant entre eux un intervalle dans lequel passent les produits P. Les deux modules 200A, 200B sont installés de façon symétrique par rapport à un plan médian vertical selon l'orientation de la figure 3. L'alimentation en produits P se fait à partir d'une rampe 270 qui déverse les produits P à la surface de la bande sécheuse 210A, 210B de l'un des cylindres 220A, 220B ou directement dans l'intervalle. Les produits P sont pris en douceur par les nappes de franges 212A, 212B plus ou moins mises en relief par le mouvement de rotation des deux cylindres 220A, 220B pour passer pratiquement sans pression dans l'intervalle entre les deux cylindres, avec le seul contact des franges de microfibres des nappes 212A, 212B qui absorbent l'eau en surface sur les deux faces des produits P. Les produits séchés P sortant de la zone de contact arrivent sur un tapis d'évacuation 271.The figure 3 shows another embodiment of a product drying installation 1B. This embodiment differs from the previous embodiments in that it consists of two drying modules 200A, 200B, twinned and in particular identical. The bearing surface of one of the modules 200A, 200B is each constituted by the dryer belt 210A, 210B of the other module. In this particular example, the dryer strips 210A, 210B are carried by rotationally driven cylinders 220A, 220B defining between them an interval in which the products P pass. The two modules 200A, 200B are installed symmetrically with respect to a plane vertical median according to the orientation of the figure 3 . The supply of products P is made from a ramp 270 which discharges the products P on the surface of the dryer belt 210A, 210B of one of the cylinders 220A, 220B or directly in the meantime. The products P are smoothly taken by the fringes 212A, 212B more or less brought into relief by the rotational movement of the two cylinders 220A, 220B to pass substantially without pressure in the gap between the two cylinders, with the only contact microfibres fringes webs 212A, 212B which absorb water surface on both sides of the products P. The dried products P leaving the contact area arrive on a conveyor belt 271.

Selon la figure 4, un autre mode de réalisation d'une installation de séchage 1C pour des produits plats à structure irrégulière et fragile tels que des feuilles ou des morceaux de feuilles de végétaux, mouillés, comme pour les installations ci-dessus, se compose de deux modules de séchage 300A, 300B de structure analogue, à convoyeurs à bande transporteuse garnie chacune d'une nappe de franges à microfibres. Les convoyeurs sont installés l'un face à l'autre en position horizontale ou sensiblement horizontale dans l'exemple présenté forment un couloir de séchage CS pour y recevoir les produits (P) à sécher en les transportant.According to figure 4 , another embodiment of a drying plant 1C for flat products with irregular and brittle structure such as leaves or pieces of plant leaves, wet, as for the above facilities, consists of two drying modules 300A, 300B of similar structure, with conveyor belts each provided with a sheet of microfibre fringes. The conveyors are installed face to face in a horizontal or substantially horizontal position in the example shown form a drying corridor CS to receive the products (P) to be dried by transporting them.

Le fonctionnement de l'installation 1C est géré par une centrale de commande 10 qui gère les modules de séchage 300A, 300 B, la vitesse de défilement et de séchage V1, V2 ainsi que d'autres paramètres tels que l'écartement (e) des deux convoyeurs définissant l'intervalle en fonction de la nature des produits à sécher. Elle commande également le fonctionnement des extracteurs d'humidité 350A, 350B et des dispositifs de traitement 360A, 360B de la bande sécheuse (surface sécheuse) de chaque module de séchage 300A, 300B.The operation of the installation 1C is managed by a control unit 10 which manages the drying modules 300A, 300B, the speed of scrolling and drying V1, V2 and other parameters such as the spacing (e) two conveyors defining the interval depending on the nature of the products to be dried. It also controls the operation of the 350A, 350B moisture extractors and 360A, 360B treatment devices of the dryer belt (dryer surface) of each drying module 300A, 300B.

De manière plus détaillée :

  • Le module de séchage 300A inférieur constitue par son brin supérieur la surface de support et de transport sur laquelle arrivent les produits P. Il se compose schématiquement d'un convoyeur 301A à bande transporteuse 302A portant une nappe de franges à microfibres 312A passant sur deux cylindres de renvoi 303A, 304A dont au moins l'un (304A) est un cylindre d'entraînement équipé d'un moteur 305B. Le brin supérieur de la bande transporteuse 302A définissant le couloir de séchage CS est soutenu par un support 306A tel qu'une plaque de glissement, une plaque à coussin d'air, une succession de rouleaux ou encore des guides latéraux pour les têtes de barres transversales (non représentées) intégrées dans la bande transporteuse 302A, pour la guider et la soutenir de manière à définir le couloir de séchage CS.
  • La bande transporteuse 302A circule dans le sens et à la vitesse V1 indiqués. Le brin de retour passe dans un extracteur d'humidité 350A représenté très schématiquement et comportant un ou plusieurs cylindres extracteurs 351A, 352A. Il comporte également une installation de traitement 360A, par exemple une installation à rayons ultraviolets UV pour désinfecter le brin de retour.
  • Le brin inférieur est soutenu par un support ou guide 307A tel qu'une plaque de glissement ou à coussin d'air, une succession de rouleaux ou des guides latéraux pour les têtes des barres transversales intégrées dans la bande transporteuse et il est appuyé contre les cylindres 351A, 352A de l'extracteur d'humidité 350A par un cylindre presseur 311A, 312A associé à chaque cylindre extracteur 351A, 352A.
  • L'extracteur d'humidité 350A est de préférence mobile par rapport au brin de retour comme cela est schématisé par un actionneur 353A relié à la centrale de commande 10 pour exécuter un mouvement de va-et-vient VV par rapport à la bande 302A et pour que les cylindres extracteurs 351A, 352A qui ont une structure analogue à celle des cylindres 250, 250A représentés aux figures 1-3 ne roulent pas seulement sur la nappe de franges à microfibres 312A mais combinent à ce mouvement de roulement, un mouvement de glissement dans un sens ou dans le sens opposé pour augmenter l'efficacité de l'extraction d'humidité. En cas de mouvement des cylindres extracteurs 351A, 352A, les cylindres presseurs 311A, 312A suivent le mouvement en restant en regard des cylindres extracteurs.
  • Le module de séchage 300B, supérieur, placé au-dessus du module de séchage inférieur 300A a une structure quasiment analogue ; il définit avec celui-ci le couloir de séchage CS. Le module supérieur 300B est de préférence de longueur légèrement plus courte que celle du module inférieur 300A pour faciliter l'arrivée des produits (P) sur le brin supérieur du convoyeur 301A du module inférieur 300A et leur répartition régulière en une couche avant d'entrer en contact avec le module supérieur 300B.
  • Le module supérieur 300B se compose d'un convoyeur 301B à bande transporteuse 302B portant une nappe de franges à microfibres 310B. La bande transporteuse 302B avec la nappe 3108 passe sur deux cylindres de renvoi 303B, 304B dont au moins l'un (304B) est un cylindre entraîné, équipé d'un moteur 305B. Le brin inférieur de la bande transporteuse 302B qui définit le couloir de séchage CS avec le brin homologue de la bande 302A du module de séchage 300A est appuyé le cas échéant à l'arrière contre le support 306B tel qu'une plaque de glissement de manière à maintenir la régularité de l'intervalle entre les deux convoyeurs 300A, 300B.
In more detail:
  • The lower drying module 300A constitutes, by its upper strand, the support and transport surface on which the P products arrive. It consists schematically of a conveyor belt 301A 302A carrying a sheet of microfibre fringes 312A passing on two cylinders. 303A, 304A of which at least one (304A) is a drive cylinder equipped with a motor 305B. The upper run of the conveyor belt 302A defining the drying corridor CS is supported by a support 306A such as a sliding plate, an air cushion plate, a succession of rollers or lateral guides for the bar heads transverse (not shown) integrated in the conveyor belt 302A, to guide and support it to define the drying corridor CS.
  • The conveyor belt 302A flows in the indicated direction and speed V1. The return strand passes into a moisture extractor 350A shown very schematically and having one or more extractor cylinders 351A, 352A. It also includes a 360A treatment facility, such as a UV ultraviolet facility to disinfect the return strand.
  • The lower strand is supported by a support or guide 307A such as a sliding or air-cushion plate, a succession of rollers or lateral guides for the heads of the transverse bars integrated in the conveyor belt and is pressed against the cylinders 351A, 352A of the moisture extractor 350A by a pressing cylinder 311A, 312A associated with each extractor cylinder 351A, 352A.
  • The moisture extractor 350A is preferably movable relative to the return strand as shown schematically by an actuator 353A connected to the control unit 10 to perform a reciprocating movement VV with respect to the strip 302A and for the extractor cylinders 351A, 352A which have a structure similar to that of the cylinders 250, 250A shown in FIGS. figures 1-3 do not roll only on the microfiber fringe web 312A but combine with this rolling movement, a sliding movement in one direction or in the opposite direction to increase the efficiency of the moisture extraction. In case of movement of the extractor cylinders 351A, 352A, the pressing rollers 311A, 312A follow the movement while remaining opposite the extractor rolls.
  • The upper drying module 300B placed above the lower drying module 300A has a substantially similar structure; it defines with this one the drying corridor CS. The upper module 300B is preferably of slightly shorter length than that of the lower module 300A to facilitate the arrival of the products (P) on the upper strand of the conveyor 301A of the lower module 300A and their regular distribution in a layer before entering in contact with the upper module 300B.
  • The upper module 300B consists of a conveyor belt conveyor 301B 302B carrying a microfiber fringe web 310B. The conveyor belt 302B with the sheet 3108 passes over two return rollers 303B, 304B, at least one of which (304B) is a driven roll, equipped with a motor 305B. The lower run of the conveyor belt 302B, which defines the drying passage CS with the homologous run of the band 302A of the drying module 300A, is optionally supported at the rear against the support 306B such as a plate slip so as to maintain the regularity of the interval between the two conveyors 300A, 300B.

Le cas échéant, la bande transporteuse supérieure 300B peut être guidée et soutenue par un support ou guide 306B pour son brin inférieur par les côtés de manière à éviter que le brin inférieur ne forme une flèche et ne réduise la hauteur du couloir de séchage CS en s'appuyant sur les produits à sécher au risque de les abîmer en les écrasant partiellement.Where appropriate, the upper conveyor belt 300B may be guided and supported by a support or guide 306B for its lower strand from the sides so as to prevent the lower strand from forming an arrow and reducing the height of the CS drying corridor. relying on the products to be dried at the risk of damaging them by partially crushing them.

La bande transporteuse supérieure 302B peut être aussi rigidifiée par des barres transversales, dont les extrémités de chaque côté sont par exemple guidées par des rails non détaillés.The upper conveyor belt 302B can also be stiffened by transverse bars, whose ends on each side are for example guided by non-detailed rails.

La bande transporteuse 302B passe sur deux cylindres de renvoi 303B, 304B dont l'un (304B) est équipé d'un moteur 305B relié à la centrale de commande 10 qui assure le réglage de la vitesse V2 de défilement de cette bande transporteuse 302B.The conveyor belt 302B passes over two deflection rollers 303B, 304B, one of which (304B) is equipped with a motor 305B connected to the control unit 10 which controls the speed V2 of the conveyor belt 302B.

Le brin de retour de la bande transporteuse 302B passe dans un extracteur d'humidité 350B constitué par des cylindres extracteurs 351B, 352B et pour assurer cette coopération, le brin de retour est, par exemple soutenu par une plaque ou autre organe de soutien 307B de façon qu'il soit positionné dans une position appropriée par rapport aux cylindres extracteurs 351B, 352B qui peuvent avoir la même structure que le cylindre perforé 250 de la figure 1.The return strand of the conveyor belt 302B passes into a moisture extractor 350B constituted by extractor cylinders 351B, 352B and to ensure this cooperation, the return strand is, for example, supported by a plate or other support member 307B. positioned in a suitable position with respect to the extractor rollers 351B, 352B which may have the same structure as the perforated cylinder 250 of the figure 1 .

Des cylindres presseurs 311B, 312B coopèrent avec les cylindres extracteurs.Pressure rollers 311B, 312B cooperate with the extractor rolls.

L'extracteur d'humidité 350B est équipé d'un actionneur 353B pour commander un mouvement de va-et-vient W des cylindres extracteurs 351B, 352B des cylindres presseurs 311B, 312B et de l'installation de traitement 360B pour une action plus rapide et plus efficace sans toutefois exclure le fonctionnement du dispositif 350B en position fixe par rapport au convoyeur 301B.The humidity extractor 350B is equipped with an actuator 353B for controlling a reciprocating movement W of the extractor cylinders 351B, 352B of the pressing rollers 311B, 312B and of the processing installation 360B for a faster action. and more efficient without, however, excluding the operation of the device 350B in a fixed position relative to the conveyor 301B.

L'installation 1C est équipée d'un dispositif de réglage 11 de la hauteur (e) du couloir de séchage CS en fonction de la nature des produits à sécher, de leur épaisseur en position aléatoire, de la structure et de la fragilité des produits. Ce réglage est utile pour une meilleure efficacité du séchage tout en ménageant les produits pour avoir un contact aussi bon que possible avec les microfibres sans abîmer ou écraser les produits pendant leur passage dans le couloir de séchage.The installation 1C is equipped with a device 11 for adjusting the height (e) of the drying corridor CS according to the nature of the products to be dried, their thickness in random position, the structure and the fragility of the products. . This setting is useful for a better efficiency of drying while sparing the products to have contact as good as possible with the microfibres without damaging or crushing the products as they pass through the drying corridor.

La vitesse de défilement V1, V2 des deux bandes transporteuses 302A, 302B est choisie selon la nature des produits à sécher. L'installation permet de régler une vitesse de défilement égale de sorte que les produits conservent leur position par rapport aux deux bandes transporteuses pour leur passage dans le couloir de séchage. Mais selon la nature des produits, il peut être intéressant de faire fonctionner les modules de séchage 300A, 300B à des vitesses de défilement V1, V2 légèrement différentes, par exemple en faisant circuler la bande 302B du module supérieur 300B à une vitesse légèrement inférieure V2 à celle V1 du module inférieur 300A de sorte que les produits entraînés à la vitesse V1 de la bande inférieure 302A frottent dans un sens contre la bande supérieure V2 ou soient entraînés par celle-ci.The speed of travel V1, V2 of the two conveyor belts 302A, 302B is chosen according to the nature of the products to be dried. The installation makes it possible to set an even running speed so that the products maintain their position relative to the two conveyor belts for their passage in the drying corridor. But depending on the nature of the products, it may be advantageous to operate the drying modules 300A, 300B at slightly different speeds of travel V1, V2, for example by circulating the band 302B of the upper module 300B at a slightly lower speed V2 to that V1 of the lower module 300A so that the products driven at the speed V1 of the lower band 302A rub in a direction against the upper band V2 or are driven by it.

L'inverse est également possible, c'est-à-dire une vitesse de défilement V1 pour la bande inférieure 302A qui est inférieure à celle de la bande supérieure 302B de sorte que la bande supérieure frotte dans un autre sens sur les produits et assure ainsi un séchage particulièrement efficace de la surface supérieure des feuilles.The opposite is also possible, that is to say a running speed V1 for the lower band 302A which is lower than that of the upper band 302B so that the upper band rubs in another direction on the products and ensures thus particularly efficient drying of the upper surface of the leaves.

Suivant le cas, les produits (P) frottent à la fois contre la bande inférieure 302A et la bande supérieure 302B.As the case may be, the products (P) rub against both the lower band 302A and the upper band 302B.

Les essais faits dans le cadre de l'invention ont montré que l'humidité en surface des produits en sortie de l'installation de séchage était inférieure à 3 %. Les installations des figures 3 et 4 ménagent tout particulièrement la structure fragile des produits du fait qu'il n'y a pas compression mais simple contact et sans ou peu de frottement puisque peu de différence de vitesses. Ce contact est néanmoins suffisant pour prendre efficacement l'humidité en surface sur les deux faces.The tests carried out in the context of the invention have shown that the surface moisture of the products leaving the drying installation was less than 3%. The facilities of figures 3 and 4 especially protect the fragile structure of products because there is no compression but simple contact and little or no friction since little difference in speed. This contact is nevertheless sufficient to effectively take surface moisture on both sides.

Suivant d'autres modes de réalisation, dans le cas de produits ayant une surface particulièrement tourmentée, il est possible de monter plusieurs modules ou modules jumelés en cascade de façon à augmenter encore plus l'efficacité de l'absorption de l'humidité surfacique des produits.According to other embodiments, in the case of products having a particularly tormented surface, it is possible to mount several cascaded modules or twin modules so as to further increase the efficiency of the absorption of the surface moisture of the products.

La figure 5 montre de manière simplifiée un exemple d'installation de séchage 1D composée de deux parties 1C, 1C' constituées chacune d'une installation de séchage selon la figure 4, montées l'une à la suite de l'autre en série, pour sécher plus rapidement des produits ayant des surfaces tourmentées, retenant beaucoup d'eau dans des cavités difficilement accessibles.The figure 5 shows in simplified manner an example of a drying installation 1D composed of two parts 1C, 1C 'constituted each of a drying installation according to the figure 4 , mounted one after the other in series, to dry more quickly products with tormented surfaces, retaining a lot of water in hard to reach cavities.

Ces deux installations 1C, 1C' formant l'installation globale 1D peuvent être séparées par un équipement de retournement non représenté qui reçoit les produits en sortie de la première partie 1C de l'installation pour les transférer en position retournée à la seconde partie 1C'.These two installations 1C, 1C 'forming the overall installation 1D can be separated by a not shown turning equipment which receives the products at the output of the first part 1C of the installation to transfer them in the returned position to the second part 1C' .

Selon une variante, les installations 1C, 1C' sont réglables en hauteur l'une par rapport à l'autre de façon que selon la nature des produits, leur dimension et autres paramètres, on puisse régler la hauteur de sortie de la première installation 1C par rapport à l'entrée de la seconde installation 1C' (ou inversement ou en combinaison), et que selon la trajectoire de chute, statistiquement les produits plats arrivent en position retournée sur l'entrée du convoyeur inférieur de la seconde installation 1C'.According to one variant, the installations 1C, 1C 'are adjustable in height relative to each other so that, depending on the nature of the products, their size and other parameters, it is possible to adjust the output height of the first installation 1C relative to the inlet of the second installation 1C '(or conversely or in combination), and that according to the fall path, statistically the flat products arrive in the inverted position on the lower conveyor inlet of the second installation 1C'.

La figure 6 montre de manière très simplifiée un autre mode de réalisation d'une installation de séchage 1E composée de deux parties formées chacune d'une installation 1C, 1C' coopérant l'une avec l'autre en série mais disposées l'une pratiquement au-dessus de l'autre. Chacune de ces installations correspond à l'installation simple représentée de manière plus complète à la figure 4. La représentation de chacune des installations 1C, 1C' se limite aux éléments essentiels.The figure 6 shows very simply another embodiment of a drying installation 1E composed of two parts each formed of a 1C installation 1C 'cooperating with each other in series but arranged one almost above the other. Each of these installations corresponds to the simple installation represented in a more complete way to the figure 4 . The representation of each of the facilities 1C, 1C 'is limited to the essential elements.

Les produits arrivent sur le convoyeur inférieur de l'installation supérieure 1C pour être ensuite transférés à l'installation inférieure 1 C', soit par chute, soit de préférence par un guide recevant les produits plats en sortie de la première installation pour les guider si possible vers la seconde installation et en profitant de ce transfert, retourner les produits plats.The products arrive on the lower conveyor of the upper installation 1C and then be transferred to the lower installation 1C ', either by dropping or preferably by a guide receiving the flat products at the outlet of the first installation to guide them if possible to the second installation and taking advantage of this transfer, return the flat products.

Ce retournement peut également être favorisé ou réalisé par un guide 12 formé par une surface cintrée, couvrant la sortie de la bande transporteuse de la première partie de l'installation, autour du cylindre de sortie pour forcer les produits tels que des feuilles ou des morceaux de feuilles à conserver leur position relative par rapport au convoyeur inférieur, et arriver ainsi en position retournée sous ce convoyeur.This reversal can also be promoted or realized by a guide 12 formed by a curved surface, covering the exit of the conveyor belt of the first part of the installation, around the exit cylinder to force products such as sheets or pieces leaves to maintain their relative position in relation to the lower conveyor, and thus arrive in the inverted position under this conveyor.

Suivant d'autres variantes, les modules de séchage ou les installations des figures 1, 4 peuvent être combinés.According to other variants, the drying modules or the installations of the figures 1 , 4 can be combined.

Les différentes installations sont comme cela a été décrit notamment pour la figure 4, équipées d'une centrale de commande 10 gérant le fonctionnement de l'installation de séchage en combinaison avec les autres parties d'une installation plus globale en amont et en aval. Les différentes installations ou parties d'installations comportent avantageusement un dispositif de réglage permettant de régler l'intervalle de la zone de séchage comme la hauteur du couloir de séchage en fonction de la nature des produits, de leur dimension et de leur fragilité.The different facilities are as described in particular for the figure 4 , equipped with a control unit 10 managing the operation of the drying installation in combination with the other parts of a more global installation upstream and downstream. The various installations or plant parts advantageously comprise an adjustment device for adjusting the interval of the drying zone as the height of the drying corridor depending on the nature of the products, their size and their fragility.

La présente invention s'applique principalement au séchage de l'eau superficielle de produits végétaux tels que des morceaux de salade venant en particulier d'un bain de lavage.The present invention applies mainly to the drying of the surface water of plant products such as pieces of salad coming in particular from a washing bath.

NOMENCLATURENOMENCLATURE

1, 1A, 1B, 1C, 1D1, 1A, 1B, 1C, 1D
Installation de séchageDrying installation
1010
Centrale de commandeControl center
1111
Actionneur de réglage de la hauteur du couloir de séchageActuator for adjusting the height of the drying corridor
1212
GuideGuide
100100
Surface d'appuiBearing surface
200200
Module de séchageDrying module
210210
Surface sécheuse, bande sécheuseDryer surface, dryer belt
211211
Surface de support de la bandeSupport surface of the tape
212212
Nappe de franges à microfibres/franges à microfibresMicrofibre Fringe Tablecloth / Microfibre Fringes
213213
Cylindre presseurPressure cylinder
220220
Cylindre de guidage de la bandeCylinder guiding the tape
221221
Cylindre de guidage de la bandeCylinder guiding the tape
222222
Surface de supportSupport surface
250250
Extracteur d'humiditéMoisture extractor
251251
Cylindre perforéPerforated cylinder
252252
Chambre d'aspirationSuction chamber
253253
Secteur à dépressionSector with depression
260260
Installation de traitementTreatment facility
270270
RampeRamp
271271
Tapis d'évacuationCarpet of evacuation
PP
ProduitProduct
ZCZC
Zone de contactContact area
ZAZA
Zone d'appuiSupport area
ZSZS
Zone de séchageDrying area
CSCS
Couloir de séchageDrying corridor
ee
Hauteur du couloir de séchageHeight of the drying corridor
V1, V2V1, V2
Vitesse de défilement des bandes de convoyeurScroll speed of conveyor belts
VVVV
Mouvement alternatif du dispositif de séchageAlternative movement of the drying device
100A100A
Surface d'appuiBearing surface
200A200A
Module de séchageDrying module
200B200B
Module de séchageDrying module
210A210A
Bande sécheuseDryer band
210B210B
Bande sécheuseDryer band
212A212A
Nappe de franges à microfibres/franges à microfibresMicrofibre Fringe Tablecloth / Microfibre Fringes
212B212B
Franges à microfibresMicrofibre fringes
220A220A
Cylindre portant la bande sécheuseCylinder carrying the dryer band
220B220B
Cylindre portant la bande sécheuse 210BCylinder carrying the 210B dryer belt
250A250A
Extracteur d'humiditéMoisture extractor
300A,B300A, B
Module de séchageDrying module
301A,B301A, B
Convoyeur à bandeBelt Conveyor
302A,B302A, B
Bande transporteuseConveyor belt
303A,B303A, B
Cylindre de renvoiReturn cylinder
304A,B304A, B
Cylindre de renvoiReturn cylinder
305A,B305A, B
MoteurEngine
306A,B306A, B
Support/appuiSupport / support
307A,B307A, B
Support/appuiSupport / support
310A,B310A, B
Nappe de franges à microfibresMicrofibre fringe tablecloth
311A,B311A, B
Cylindre presseurPressure cylinder
312A,B312A, B
Cylindre presseurPressure cylinder
350A,B350A, B
Extracteur d'humiditéMoisture extractor
351A,B351A, B
Cylindre extracteurExtractor cylinder
352A,B352A, B
Cylindre extracteurExtractor cylinder
353A,B353A, B
Actionneuractuator
360A,B360A, B
Installation de traitementTreatment facility

Claims (11)

Installation de séchage de produits végétaux mouillés, traversée par les produits à sécher,
installation caractérisée en ce qu'
elle comporte au moins un module de séchage (200, 200A, 200B, 300A, 300B) comprenant : - une surface d'appui (100, 100A, 306A, 306B) recevant les produits à sécher (P), - une zone de contact (ZC, CS) des produits à sécher définie entre la surface d'appui (100) et une surface sécheuse (210, 210A, 210B) garnie d'une nappe de franges de microfibres (212, 212A, 212B, 310A, 310B) dans la zone de contact (ZC, CS), - un extracteur d'humidité (250, 250A, 350A, 350B) après la zone de contact (ZC, CS) selon le sens de défilement de la surface sécheuse (210), pour comprimer la surface sécheuse et en aspirer l'humidité. Drying plant for wet vegetable products, through which products to be dried,
installation characterized in that
it comprises at least one drying module (200, 200A, 200B, 300A, 300B) comprising: a bearing surface (100, 100A, 306A, 306B) receiving the products to be dried (P), - a contact zone (ZC, CS) of the products to be dried defined between the bearing surface (100) and a dryer surface (210, 210A, 210B) filled with a sheet of microfibre fringes (212, 212A, 212B , 310A, 310B) in the contact zone (ZC, CS), - A moisture extractor (250, 250A, 350A, 350B) after the contact zone (ZC, CS) in the direction of travel of the dryer surface (210), to compress the dryer surface and suck the moisture. Installation selon la revendication 1,
caractérisée en ce que
la surface sécheuse (210) est constituée par une bande garnie d'une nappe de franges de microfibres (212).Installation according to claim 1,
characterized in that
the dryer surface (210) is constituted by a strip lined with a web of microfibre fringes (212). Installation selon la revendication 1,
caractérisée en ce que
la surface d'appui (100) est une bande transporteuse circulant à la même vitesse que la bande sécheuse (210) dans la zone de contact (ZC).Installation according to claim 1,
characterized in that
the bearing surface (100) is a conveyor belt traveling at the same speed as the dryer belt (210) in the contact zone (ZC). Installation selon la revendication 1,
caractérisée en ce que
la surface sécheuse (210) est un manchon porté par un cylindre (220A) entraîné en rotation.Installation according to claim 1,
characterized in that
the dryer surface (210) is a sleeve carried by a cylinder (220A) rotated. Installation selon la revendication 1,
caractérisée en ce que
l'extracteur d'humidité (250) est un cylindre perforé (251), tournant au contact de la surface sécheuse (210) pour la comprimer dans une zone de compression (ZA) au niveau de laquelle le cylindre perforé (251) est relié à une source de dépression (252) pour aspirer l'humidité exprimée par la surface sécheuse (210) et contenue dans celle-ci.Installation according to claim 1,
characterized in that
the moisture extractor (250) is a perforated cylinder (251) rotating in contact with the dryer surface (210) to compress it in an area compression device (ZA) at which the perforated cylinder (251) is connected to a vacuum source (252) for sucking moisture contained in and contained in the dryer surface (210). Installation selon la revendication 1,
caractérisée en ce qu'
elle se compose de deux modules de séchage (200A, 200B, 300A, 300B), jumelés, constituant réciproquement la surface d'appui de l'un par rapport à l'autre pour définir entre eux une zone de contact (ZC) dans laquelle passent les produits (P) à sécher.Installation according to claim 1,
characterized in that
it consists of two twinned drying modules (200A, 200B, 300A, 300B) which reciprocally constitute the support surface of one with respect to the other to define between them a contact zone (ZC) in which pass the products (P) to dry. Installation selon la revendication 6,
caractérisée en ce que
chaque module de séchage (300A, 300B) est un convoyeur (301A, 301B) à bande transporteuse (302A, 302B) munie d'une nappe de franges de microfibres (310A, 310B), les modules étant montés l'un sensiblement parallèle à l'autre, un module inférieur (300A) et un module supérieur (300B) au-dessus du module inférieur dont les brins en regard définissent une zone de contact (ZC) en forme de couloir (CS), et
d'une installation de gestion (10) gérant la vitesse de défilement des bandes transporteuses (302A, 302B), chaque autre brin que celui définissant le couloir de séchage (CS) étant équipé d'un extracteur d'humidité (250A, 250B).Installation according to claim 6,
characterized in that
each drying module (300A, 300B) is a belt conveyor (301A, 301B) (302A, 302B) provided with a microfiber web (310A, 310B), the modules being mounted substantially parallel to each other; the other, a lower module (300A) and an upper module (300B) above the lower module whose facing strands define a contact zone (ZC) in the form of a corridor (CS), and
a management facility (10) controlling the conveyor speed (302A, 302B), each other than the dryer corridor (CS) being equipped with a moisture extractor (250A, 250B) . Installation selon la revendication 7,
caractérisée en ce que
l'écartement des deux modules (300A, 300B) de l'installation (1C) est réglable pour définir la hauteur (e) du couloir de séchage (CS).Installation according to claim 7,
characterized in that
the spacing of the two modules (300A, 300B) of the installation (1C) is adjustable to define the height (e) of the drying corridor (CS). Installation selon la revendication 6,
caractérisée en ce que
la vitesse de défilement (V1, V2) de chacune des bandes transporteuses (302A, 302B) est commandée par l'installation de gestion (10).Installation according to claim 6,
characterized in that
the traveling speed (V1, V2) of each of the conveyor belts (302A, 302B) is controlled by the management installation (10). Installation selon la revendication 7,
caractérisée en ce qu'
elle est formée d'une succession d'installations élémentaires composées chacune d'un module de séchage (300A, 300B) formé par un convoyeur (301A, 301B) à bande transporteuse (302A, 302B) munie d'une nappe de franges de microfibres, (310A, 310B), montés sensiblement parallèle l'un à l'autre, un module inférieur (300A) et un module supérieur (300B) au-dessus du module inférieur délimitant avec celui-ci un couloir de séchage (CS), ainsi qu'une installation de gestion gérant la vitesse de défilement des bandes transporteuses (302A, 302B) de chaque module de séchage ainsi qu'un guide (12) pour conduire les produits de la sortie d'une installation élémentaire à l'entrée de l'installation élémentaire suivante, ces installations montées en série étant placées l'une à la suite de l'autre ou l'une au-dessus de l'autre.Installation according to claim 7,
characterized in that
it is formed of a succession of elementary installations each consisting of a drying module (300A, 300B) formed by a conveyor (301A, 301B) with a conveyor belt (302A, 302B) provided with a sheet of microfibre fringes , (310A, 310B), mounted substantially parallel to each other, a lower module (300A) and an upper module (300B) above the lower module delimiting therewith a drying corridor (CS), and a management facility managing the speed of travel of the conveyor belts (302A, 302B) of each drying module and a guide (12) for driving the products from the output of an elementary installation to the input of the next basic installation, these series-mounted installations being placed one after the other or one above the other. Installation selon la revendication 1,
caractérisée en ce que
le module (200) comporte un dispositif de traitement (260) de la surface sécheuse (210) sèche en sortie de la zone d'aspiration (ZA) de l'humidité.Installation according to claim 1,
characterized in that
the module (200) comprises a device (260) for treating the dry dryer surface (210) at the outlet of the suction zone (ZA) from the humidity.
EP12152906.9A 2011-01-31 2012-01-27 Apparatus for drying products Active EP2482017B1 (en)

Priority Applications (1)

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FR1150732A FR2971045A1 (en) 2011-01-31 2011-01-31 Apparatus for drying washed and cut lettuce leaves, has extractor arranged in downstream of contact area along winding direction of drying surface of drying band for compressing drying surface and for sucking moisture from products
FR1250760A FR2971046B1 (en) 2011-01-31 2012-01-26 DRYING INSTALLATION OF PRODUCTS

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ES (1) ES2538836T3 (en)
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WO2009145623A1 (en) * 2008-05-30 2009-12-03 Fico B.V. Device and method for drying separated electronic components
DE202010012094U1 (en) * 2010-09-02 2010-11-11 Allguth Gmbh Dry element for car washes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114485128A (en) * 2022-01-21 2022-05-13 徐淑英 Organic fertilizer production waste treatment device with environment-friendly function and treatment method thereof

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FR2971046B1 (en) 2013-02-01
FR2971046A1 (en) 2012-08-03
PT2482017E (en) 2015-08-31
EP2482017B1 (en) 2015-03-11
DK2482017T3 (en) 2015-06-15
PL2482017T3 (en) 2015-10-30

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