EP1740898A1 - Dehydration installation using zeolites - Google Patents

Dehydration installation using zeolites

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Publication number
EP1740898A1
EP1740898A1 EP05753686A EP05753686A EP1740898A1 EP 1740898 A1 EP1740898 A1 EP 1740898A1 EP 05753686 A EP05753686 A EP 05753686A EP 05753686 A EP05753686 A EP 05753686A EP 1740898 A1 EP1740898 A1 EP 1740898A1
Authority
EP
European Patent Office
Prior art keywords
products
compartment
enclosure
zeolites
installation according
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
EP05753686A
Other languages
German (de)
French (fr)
Other versions
EP1740898B1 (en
Inventor
Dominique Boutaud
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.)
MILLENNIUM ENERGY Ste
Original Assignee
Millennium Energy Ste
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Filing date
Publication date
Application filed by Millennium Energy Ste filed Critical Millennium Energy Ste
Publication of EP1740898A1 publication Critical patent/EP1740898A1/en
Application granted granted Critical
Publication of EP1740898B1 publication Critical patent/EP1740898B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F26B21/083—Humidity by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves
    • 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
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/044—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying materials in a batch operation in an enclosure having a plurality of shelves which may be heated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F26B9/066—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers the products to be dried being disposed on one or more containers, which may have at least partly gas-previous walls, e.g. trays or shelves in a stack

Definitions

  • the present invention relates to a dehydration installation using more particularly zeolites as adsorption means.
  • the invention is in particular intended for the dehydration of food products whose organoleptic qualities must be preserved.
  • a zeolite is a material comprising pores with a diameter greater than the smallest dimension of a water molecule and electrical charges attracting the water molecules. These characteristics give the zeolite a power of adsorption of water which is interesting in the field of dehydration.
  • Dehydration by means of zeolites, or "zeodration” is generally carried out by means of an installation comprising a first enclosure and a second adjoining enclosure and in communication with one another.
  • the first enclosure is arranged to receive products to be dehydrated and the second enclosure receives zeolites and is equipped with a pump for extracting air from the enclosures.
  • the suction pump creates a depression in the enclosures which promotes evaporation of the water contained in the products which are possibly heated.
  • the water vapor passes into the second enclosure or it is trapped in the zeolites. This type of dehydration is particularly effective.
  • some of the aromas are still extracted from the products. These aromas are found in the second enclosure before being evacuated by the pump.
  • An object of the invention is to provide a means for dehydrating products, in particular food products, which is effective while not causing that a minimum deterioration of the organoleptic qualities of the products.
  • a product dehydration installation comprising an enclosure, an air suction member contained in the enclosure, a receptacle for products open and received in the enclosure, and moisture adsorption means, the enclosure comprising an open receptacle receiving compartment at least one wall of which is formed by a layer of the adsorption means through which the air from the compartment is sucked.
  • the wall formed by the layer of adsorption means is the upper wall and this wall comprises a plate having a bottom permeable to air and water vapor.
  • the compartment comprises a bottom wall also formed by a layer of adsorption means. The efficiency of the installation is thus further improved.
  • the upper pa-king of the compartment is adjustable in height and the receptacle advantageously comprises lateral walls intended to come into abutment against the bottom of the plate forming the upper wall. compartment.
  • the installation comprises a means for reheating the product receptacle. This avoids that the evaporation of the water produces a cooling of the products which would be detrimental to their qualities.
  • the adsorption means producing heat during the adsorption of water, the adsorption means are arranged in such a way that the heat release contributes to the heating of the products.
  • FIG. 1 is a perspective view of an installation according to the invention
  • - Figure 2 is a perspective view of the product support module and zeolites of this installation
  • - Figure 3 is a partial sectional view along plane III of Figure 2 of this module.
  • the installation according to the invention comprises an enclosure generally designated in 1 which is here delimited by a blind tubular wall 2 having an open end closed in leaktight manner by a door 3.
  • the enclosure 1 is associated with a vacuum device shown diagrammatically at 4 which comprises in a manner known per se a pump suction, air contained in enclosure 1.
  • a module generally designated at 5 for supporting products to be dehydrated and zeolites is received in enclosure 1.
  • This module 5 here comprises two side walls 6 between which are fixed pairs of trays 7.a, 8.a; 7.b, 8.b; 7.c, 8.c horizontal.
  • the plates 7, 8 have side walls 9 and a bottom 10 which has at least one opening 11 in which a grid 12 extends.
  • Each plate 7 is here rigidly fixed to the side walls 6 while the corresponding plate 8 extends above and at a distance from the plate 7 concerned and is connected to the side walls 6 by slides 13 adjustable in height in a manner known in itself.
  • the plate 8 of a pair is also spaced from the plate 7 of the pair of adjacent plates.
  • the side walls 6 have slots 29 which extend opposite each space existing between the free edges of the side walls 9 of the plate 8 of a pair of plates and the bottom 10 of the plate 7 of the adjacent pair.
  • Inside each plate 7, 8 extends a coil 14.
  • the coils 14 are connected to each other by a pipe 15 to form a circuit for transporting a heat transfer fluid.
  • the conduits 15 are flexible or of variable length so as not to impede the movements of the plates 8.
  • the coils 14 located at the ends of this circu.it are connected to a thermal regulation member 16 ensuring in known manner in itself the propulsion of the heat transfer fluid in the circuit and the cooling of said fluid.
  • the plates 7, 8 receive zeolites 17.
  • the grid 12 has meshes retaining the zeolites 17.
  • the grid 12 allows the passage of air and water vapor.
  • a tray 18 intended to receive the products to be dehydrated is received between the trays 7, 8 of each pair of trays.
  • the plate 18 comprises a bottom 19 and side walls 20 pierced with openings 21.
  • Each plate 18 is received on sliding slides 22 in contact with the zeolites 17 of the plate 7 above which it is mounted.
  • the slides 22 and the plate 18 are made of thermally conductive material so as to establish a heat exchange relationship between the products contained in the plate 18 and these zeolites 17. As a variant, the slides 22 can be fixed. The operation of the installation will now be described.
  • each tray 18 is placed between the corresponding pair of trays 7, 8.
  • the tray 8 is then lowered so that the bottom 10 of the latter comes into contact with the free edges of the side walls 20 of the plates 18.
  • Each pair of plates 7, 8, the corresponding plate 18 and the side walls 6 form a compartment.
  • the door 3 is then closed and the suction pump of the vacuum means 4 is put into operation.
  • the air is then sucked into the enclosure 1.
  • the air escapes from the plates 18 mainly through the upper opening thereof and through the opening 11 in the bottom 10 of the plates 8 before passing through the zeolites 17 to flow in the space separating the pairs of trays.
  • Air also escapes through the openings 21 in the side walls 20 of the plates 18 before passing through zeolites 17 and the openings 11 in the plates 7 to flow into the space separating the pairs of plates.
  • the air flows out of the space separating the pairs of trays by the openings 29 of the side walls 6 and is evacuated outside the enclosure by the pump of the vacuum means 4.
  • the pressure in the enclosure 1 decreasing, the water contained in the products evaporates.
  • the water vapor thus created follows the same path as air to the zeolites in the pores of which it is trapped.
  • the products are thus gradually dehydrated. It will be noted that the air in the compartment is sucked through the zeolites so that most of the aromas cannot escape from the compartment, the zeolites limiting the passage of these towards the outside of the compartment.
  • the aromas are therefore maintained in the vicinity of the products.
  • the adsorption of water generates a rise in temperature of the zeolites 17.
  • the heat generated at the level of the zeolites 17 of the plate 8 is communicated to the products by radiation.
  • the heat generated at the level of the zeolites 17 of the plate 7 is communicated to the products by conduction via the slides 22 and the plate 18.
  • the heating of the products makes it possible to increase the evaporation of the water. This heating is controlled via the thermal regulation member 16 as a function of the information provided by temperature sensors not shown scattered in the module 5. It is also possible to use the thermal regulating member to maintain a temperature difference between the products and the immediate environment thereof.
  • a temperature of 20 ° can be maintained at the level of the products and 70 ° at the vicinity thereof. This temperature difference causes condensation on the aroma products which are kept in the compartment.
  • the installation may have a geometry different from that described.
  • the module can have a different number of trays.

Abstract

The invention relates to a product dehydration installation comprising a housing (1), a device for the intake of air contained in the housing, an open product receptacle (18) received in the housing, and means for adsorbing humidity (17). Said housing comprises a compartment for receiving the open receptacle, at least one wall of said compartment being formed by a layer (7, 8) of the adsorption means (17), through which the air contained in the compartment is evacuated.

Description

Installation de déshydratation par zéolithes. Dehydration installation using zeolites.
La présente invention concerne une installation de déshydratation utilisant plus particulièrement des zéolithes comme moyens d'adsorption. L'invention est notamment destinée à la déshydratation de produits alimentaires dont les qualités organoleptiques doivent être conservées . On rappelle qu'une zéolithe est un matériau com- portant des pores de diamètre supérieur à la plus petite dimension d'une molécule d'eau et des charges électriques attirant les molécules d'eau. Ces caractéristiques confèrent à la zéolithe un pouvoir d'adsorption de l'eau intéressant dans le domaine de la déshydratation. La déshydratation au moyen de zéolithes, ou "zéo- dratation" , est généralement réalisée au moyen d'une installation comportant une première enceinte et une deuxième enceinte attenantes et en communication l'une avec l'autre. La première enceinte est agencée pour rece- voir des produits à déshydrater et la deuxième enceinte reçoit des zéolithes et est équipée d'une pompe d'aspiration d'air contenu dans les enceintes. La pompe d'aspiration crée une dépression dans les enceintes qui favorise 1 ' évaporation de l'eau contenu dans les produits qui sont éventuellement chauffés. La vapeur d'eau passe dans la deuxième enceinte ou elle est piégée dans les zéolithes. Ce type de déshydratation est particulièrement efficace. Toutefois, une partie des arômes est quand même extraite des produits . Ces arômes se retrouvent dans la deuxième enceinte avant d'en être évacués par la pompe.The present invention relates to a dehydration installation using more particularly zeolites as adsorption means. The invention is in particular intended for the dehydration of food products whose organoleptic qualities must be preserved. It is recalled that a zeolite is a material comprising pores with a diameter greater than the smallest dimension of a water molecule and electrical charges attracting the water molecules. These characteristics give the zeolite a power of adsorption of water which is interesting in the field of dehydration. Dehydration by means of zeolites, or "zeodration", is generally carried out by means of an installation comprising a first enclosure and a second adjoining enclosure and in communication with one another. The first enclosure is arranged to receive products to be dehydrated and the second enclosure receives zeolites and is equipped with a pump for extracting air from the enclosures. The suction pump creates a depression in the enclosures which promotes evaporation of the water contained in the products which are possibly heated. The water vapor passes into the second enclosure or it is trapped in the zeolites. This type of dehydration is particularly effective. However, some of the aromas are still extracted from the products. These aromas are found in the second enclosure before being evacuated by the pump.
Il en résulte une altération des qualités organoleptiques des produits déshydratés. Un but de l'invention est de proposer un moyen de déshydratation de produits, en particulier de produits alimentaires, qui soit efficace tout en n'occasionnant qu'une altération minimum des qualités organoleptiques des produits. A cet effet, on prévoit, selon l'invention, une installation de déshydratation de produits, comprenant une enceinte, un organe d'aspiration d'air contenu dans l'enceinte, un réceptacle à produits ouvert et reçu dans l'enceinte, et des moyens d'adsorption d'humidité, l'enceinte comprenant un compartiment de réception du réceptacle ouvert dont au moins une paroi est formée par une couche des moyen d'adsorption au travers de laquelle est aspiré 1 ' air du compartiment . Les arômes qui s'échapperaient des produits lors de 1 ' évaporation de l'eau contenu dans les produits ne peuvent passer au travers des zéolithes. Ces arômes ne peuvent s'échapper du compartiment et restent confinés au voisinage des produits. La destruction d'arômes est de la sorte limitée. Les zéolithes assurent ainsi leur fonction d'adsorption des molécules d'eau tout en constituant un barrage pour les arômes . Selon un mode de réalisation particulier, la paroi formée par la couche de moyens d'adsorption est la paroi supérieure et cette paroi comprend un plateau ayant un fond perméable à l'air et à la vapeur d'eau. Ce mode de réalisation est particulièrement sim- pie et assure une évacuation optimale de l'air et de la vapeur d ' eau . Avantageusement, le compartiment comprend une paroi inférieure également formée par une couche de moyens d' adsorption. L'efficacité de l'installation est ainsi encore améliorée . De préférence, la pa-roi supérieure du compartiment est réglable en hauteur et le réceptacle comprend avantageusement des parois latérales destinées à venir en appui contre le fond du plateau formant la paroi supé- rieure du compartiment. Ceci permet d'amener la couche de moyens d'adsorption au plus près des produits et de confiner les arômes au plus près des produits . Selon une caractéristique particulière, l'installation comprend un moyen de réchauffage du réceptacle à produits . On évite ainsi que 1 ' évaporâtion de l'eau ne produise un refroidissement des produits qui serait préjudi- ciable à leurs qualités. De préférence alors, les moyens d'adsorption produisant un dégagement de chaleur lors de l'adsorption d'eau, les moyens d'adsorption sont agencés de telle manière que le dégagement de chaleur contribue au rêchauf- fement des produits. Le dégagement de chaleu-r peut être communiqué aux produits par conduction et rayonnement . Le réchauffage ne nécessite pas d'apport d'énergie extérieure, ce qui rend l'installation de l'invention relativement économe en énergie. D'autres caractéristiq .es et avantages de l'invention ressortiront à la lecture de la description qui suit d'un mode de réalisation particulier non limitatif de l'invention. II sera fait référence aux dessins annexés, parmi lesquels : - la figure 1 est une vue en perspective d'une installation conforme à l'invention, - la figure 2 est une vue en perspective du mo- dule de support des produits et des zéolithes de cette installation, - la figure 3 est une -vue partielle en coupe selon le plan III de la figure 2 de ce module. En référence aux figures, l'installation conforme à l'invention comprend une enceinte généralement désignée en 1 qui est ici délimitée par une paroi tubulaire borgne 2 ayant une extrémité ouverte obturée de manière étanche par une porte 3. L'enceinte 1 est associée à un organe de mise sous vide schématisé en 4 qui comprend de façon connue en soi une pompe d'aspiration, de l'air contenu dans l'enceinte 1. Un module généralement désigné en 5 de support de produits à déshydrater et de zéolithes est reçu dans l'enceinte 1. Ce module 5 comprend ici deux parois latérales 6 entre lesquelles sont fixés des paires de plateaux 7. a, 8. a ; 7.b, 8.b ; 7.c, 8.c horizontaux. Les plateaux 7, 8 ont des parois latérales 9 et un fond 10 qui présente au moins une ouverture 11 dans laquelle s'étend une grille 12. Chaque plateau 7 est ici rigidement fixé aux parois latérales 6 tandis que le plateau 8 correspondant s'étend au-dessus et à distance du plateau 7 concerné et est relié aux parois laté-trales 6 par des glissières 13 réglables en hauteur de manière connue en elle-même. Le plateau 8 d'une paire est également espacé du plateau 7 de la paire de plateaux adj acente . Les parois latérales 6 présentent des lumières 29 qui s'étendent en regard de chaque espace existant entre le bords libre des parois latérales 9 du plateau 8 d'une paire de plateaux et le fond 10 du plateau 7 de la paire adjacente . A l'intérieur de chaque plateau 7, 8 s'étend un serpentin 14. Les serpentins 14 sont reliés les uns aux autres par une conduite 15 pour former un circuit de transport d'un fluide caloporteur. Les conduites 15 sont souples ou de longueur variable pour ne pas entraver les mouvements des plateaux 8. Les serpentins 14 se trouvant aux extrémités de ce circu.it sont reliés à un organe de régulation thermique 16 assurant de manière connue en elle-même la propulsion du fluide caloporteur dans le circuit et le refroidissement dudit fluide. Les plateaux 7, 8 reçoivent des zéolithes 17. La grille 12 possède des mailles retenant les zéolithes 17. La grille 12 permet le passage de l'air et de la vapeur d ' eau . Un plateau 18 destiné à recevoir les produits à déshydrater est reçu entre les plateaux 7, 8 de chaque paire de plateaux. Le plateau 18 comprend un fond 19 et des parois latérales 20 percées d'ouvertures 21. Chaque plateau 18 est reçu sur des glissières 22 coulissantes en contact avec les zéolithes 17 du plateau 7 au-dessus duquel il est monté. Les glissières 22 et le plateau 18 sont en matériau conducteur thermiquement de manière à établir une relation d'échange thermique entre les produits contenus dans le plateau 18 et ces zéolithes 17. En variante, les glissières 22 peuvent être fixes. Le fonctionnement de 1 ' installation va maintenant être décrit . Après chargement des plateaux 18 en produits à déshydrater, chaque plateau 18 est mis en place entre la paire correspondante de plateaux 7, 8. Le plateau 8 est alors abaissé de manière que le fond 10 de celui-ci vienne en contact des bords libres des parois latérales 20 des plateaux 18. Chaque paire de plateaux 7, 8, le plateau 18 correspondant et les parois latérales 6 forment un compartiment . La porte 3 est ensuite refermée et la pompe d'as- piration des moyens de mise sous vide 4 est mise en fonctionnement . L'air est alors aspiré dans l'enceinte 1. L'air s'échappe des plateaux 18 principalement par l'ouverture supérieure de ceux-ci et par l'ouverture 11 du fond 10 des plateaux 8 avant de traverser les zéolithes 17 pour se s'écouler dans l'espace séparant les paires de plateaux. L'air s'échappe également par les ouvertures 21 des parois latérales 20 des plateaux 18 avant de passer au travers des zéolithes 17 des et des ouvertures 11 des plateaux 7 pour s'écouler dans l'espace séparant les paires de plateaux. L'air s'écoule hors de l'espace séparant les paires de plateaux par les lumières 29 des parois latérales 6 et est évacué hors de l'enceinte par la pompe des moyens de mise sous vide 4. La pression dans l'enceinte 1 diminuant, l'eau contenu dans les produits s'évapore. La vapeur d'eau ainsi créée suit le même trajet que l'air jusqu'aux zéolithes dans les pores desquelles elle est piégée. Les produits sont ainsi progressivement déshydratés . On notera que l'air du compartiment est aspiré au travers des zéolithes de sorte que la plupart des arômes ne peuvent s'échapper du compartiment, les zéolithes li- mitant le passage de ceux-ci vers l'extérieur du compartiment. Comme les z.éolithes sont très proches des produits, les arômes sont donc maintenus au voisinage des produits . L'adsorption de l'eau engendre une élévation de température des zéolithes 17. La chaleur engendrée au niveau des zéolithes 17 du plateau 8 est communiquée aux produits par rayonnement. La chaleur engendrée au niveau des zéolithes 17 du plateau 7 est communiquée aux produits par conduction via les glissières 22 et le plateau 18. Le réchauffement des produits permet d'augmenter 1 ' évaporation de l'eau. Ce réchauffement est contrôlé par l'intermédiaire de l'organe de régulation thermique 16 en fonction des informations fournies par des capteurs de température non représentés disséminés dans le module 5. Il est également possible d'utiliser l'organe de régulation thermique pour entretenir une différence de température entre les produits et l'environnement immédiat de ceux-ci. Par exemple, on peut maintenir une tem- pérature de 20° au niveau des produits et de 70° aux voisinage de celui-ci. Cette différence de température provoque une condensation sur les produits des arômes qui sont maintenus dans le compartiment . Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention tel que défini par les revendications. En particulier, l'installation peut avoir une géométrie différente de celle décrite. Le module peut comporter un nombre différent de plateaux. This results in an alteration of the organoleptic qualities of the dehydrated products. An object of the invention is to provide a means for dehydrating products, in particular food products, which is effective while not causing that a minimum deterioration of the organoleptic qualities of the products. To this end, provision is made, according to the invention, for a product dehydration installation, comprising an enclosure, an air suction member contained in the enclosure, a receptacle for products open and received in the enclosure, and moisture adsorption means, the enclosure comprising an open receptacle receiving compartment at least one wall of which is formed by a layer of the adsorption means through which the air from the compartment is sucked. The aromas which would escape from the products during the evaporation of the water contained in the products cannot pass through zeolites. These aromas cannot escape from the compartment and remain confined to the vicinity of the products. The destruction of aromas is thus limited. The zeolites thus ensure their function of adsorption of water molecules while constituting a barrier for the aromas. According to a particular embodiment, the wall formed by the layer of adsorption means is the upper wall and this wall comprises a plate having a bottom permeable to air and water vapor. This embodiment is particularly simple and ensures optimal evacuation of air and water vapor. Advantageously, the compartment comprises a bottom wall also formed by a layer of adsorption means. The efficiency of the installation is thus further improved. Preferably, the upper pa-king of the compartment is adjustable in height and the receptacle advantageously comprises lateral walls intended to come into abutment against the bottom of the plate forming the upper wall. compartment. This makes it possible to bring the layer of adsorption means as close as possible to the products and to confine the aromas as close as possible to the products. According to a particular characteristic, the installation comprises a means for reheating the product receptacle. This avoids that the evaporation of the water produces a cooling of the products which would be detrimental to their qualities. Preferably then, the adsorption means producing heat during the adsorption of water, the adsorption means are arranged in such a way that the heat release contributes to the heating of the products. The release of heat can be communicated to the products by conduction and radiation. The reheating does not require any external energy supply, which makes the installation of the invention relatively energy efficient. Other characteristics and advantages of the invention will emerge on reading the following description of a particular non-limiting embodiment of the invention. Reference will be made to the accompanying drawings, in which: - Figure 1 is a perspective view of an installation according to the invention, - Figure 2 is a perspective view of the product support module and zeolites of this installation, - Figure 3 is a partial sectional view along plane III of Figure 2 of this module. With reference to the figures, the installation according to the invention comprises an enclosure generally designated in 1 which is here delimited by a blind tubular wall 2 having an open end closed in leaktight manner by a door 3. The enclosure 1 is associated with a vacuum device shown diagrammatically at 4 which comprises in a manner known per se a pump suction, air contained in enclosure 1. A module generally designated at 5 for supporting products to be dehydrated and zeolites is received in enclosure 1. This module 5 here comprises two side walls 6 between which are fixed pairs of trays 7.a, 8.a; 7.b, 8.b; 7.c, 8.c horizontal. The plates 7, 8 have side walls 9 and a bottom 10 which has at least one opening 11 in which a grid 12 extends. Each plate 7 is here rigidly fixed to the side walls 6 while the corresponding plate 8 extends above and at a distance from the plate 7 concerned and is connected to the side walls 6 by slides 13 adjustable in height in a manner known in itself. The plate 8 of a pair is also spaced from the plate 7 of the pair of adjacent plates. The side walls 6 have slots 29 which extend opposite each space existing between the free edges of the side walls 9 of the plate 8 of a pair of plates and the bottom 10 of the plate 7 of the adjacent pair. Inside each plate 7, 8 extends a coil 14. The coils 14 are connected to each other by a pipe 15 to form a circuit for transporting a heat transfer fluid. The conduits 15 are flexible or of variable length so as not to impede the movements of the plates 8. The coils 14 located at the ends of this circu.it are connected to a thermal regulation member 16 ensuring in known manner in itself the propulsion of the heat transfer fluid in the circuit and the cooling of said fluid. The plates 7, 8 receive zeolites 17. The grid 12 has meshes retaining the zeolites 17. The grid 12 allows the passage of air and water vapor. A tray 18 intended to receive the products to be dehydrated is received between the trays 7, 8 of each pair of trays. The plate 18 comprises a bottom 19 and side walls 20 pierced with openings 21. Each plate 18 is received on sliding slides 22 in contact with the zeolites 17 of the plate 7 above which it is mounted. The slides 22 and the plate 18 are made of thermally conductive material so as to establish a heat exchange relationship between the products contained in the plate 18 and these zeolites 17. As a variant, the slides 22 can be fixed. The operation of the installation will now be described. After loading the trays 18 with products to be dehydrated, each tray 18 is placed between the corresponding pair of trays 7, 8. The tray 8 is then lowered so that the bottom 10 of the latter comes into contact with the free edges of the side walls 20 of the plates 18. Each pair of plates 7, 8, the corresponding plate 18 and the side walls 6 form a compartment. The door 3 is then closed and the suction pump of the vacuum means 4 is put into operation. The air is then sucked into the enclosure 1. The air escapes from the plates 18 mainly through the upper opening thereof and through the opening 11 in the bottom 10 of the plates 8 before passing through the zeolites 17 to flow in the space separating the pairs of trays. Air also escapes through the openings 21 in the side walls 20 of the plates 18 before passing through zeolites 17 and the openings 11 in the plates 7 to flow into the space separating the pairs of plates. The air flows out of the space separating the pairs of trays by the openings 29 of the side walls 6 and is evacuated outside the enclosure by the pump of the vacuum means 4. The pressure in the enclosure 1 decreasing, the water contained in the products evaporates. The water vapor thus created follows the same path as air to the zeolites in the pores of which it is trapped. The products are thus gradually dehydrated. It will be noted that the air in the compartment is sucked through the zeolites so that most of the aromas cannot escape from the compartment, the zeolites limiting the passage of these towards the outside of the compartment. As the zeolites are very close to the products, the aromas are therefore maintained in the vicinity of the products. The adsorption of water generates a rise in temperature of the zeolites 17. The heat generated at the level of the zeolites 17 of the plate 8 is communicated to the products by radiation. The heat generated at the level of the zeolites 17 of the plate 7 is communicated to the products by conduction via the slides 22 and the plate 18. The heating of the products makes it possible to increase the evaporation of the water. This heating is controlled via the thermal regulation member 16 as a function of the information provided by temperature sensors not shown scattered in the module 5. It is also possible to use the thermal regulating member to maintain a temperature difference between the products and the immediate environment thereof. For example, a temperature of 20 ° can be maintained at the level of the products and 70 ° at the vicinity thereof. This temperature difference causes condensation on the aroma products which are kept in the compartment. Of course, the invention is not limited to the embodiment described and it is possible to make variant embodiments without departing from the scope of the invention as defined by the claims. In particular, the installation may have a geometry different from that described. The module can have a different number of trays.

Claims

REVENDICATIONS
1. Installation de déshydratation de produits, comprenant une enceinte (1), un organe d'aspiration d'air (4) contenu dans l'enceinte, un réceptacle (18) à produits ouvert et reçu dans l'enceinte, et des moyens d'adsorption d'humidité (17), caractérisée en ce que 1 ' enceinte comprend un compartiment de réception du réceptacle ouvert, dont au moins une paroi est formée par une couche (7, 8) de moyens d'adsorption (17) au travers de laquelle est aspiré l'air du compartiment . 1. Installation for dehydrating products, comprising an enclosure (1), an air suction member (4) contained in the enclosure, a receptacle (18) for products open and received in the enclosure, and means moisture adsorption (17), characterized in that the enclosure comprises a compartment for receiving the open receptacle, at least one wall of which is formed by a layer (7, 8) of adsorption means (17) at the through which air is drawn from the compartment.
2. Installation selon la revendication 1, caractérisée en ce que la paroi formée par la couche (8) de moyens d'adsorption (17) est la paroi supérieure et en ce que cette paroi comprend un plateau (8) ayant un fond perméable à l'air et à l'eau. 2. Installation according to claim 1, characterized in that the wall formed by the layer (8) of adsorption means (17) is the upper wall and in that this wall comprises a plate (8) having a bottom permeable to air and water.
3. Installation selon la revendication 2, caractérisée en ce que le compartiment comprend une pa- roi inférieuire également formée par une couche (7) de moyens d'adsorption (17) . 3. Installation according to claim 2, characterized in that the compartment comprises a lower wall also formed by a layer (7) of adsorption means (17).
4. Installation selon la revendication 2, caractérisée en ce que la paroi supérieure du compartiment est réglable en hauteur. 4. Installation according to claim 2, characterized in that the upper wall of the compartment is adjustable in height.
5. Installation selon la revendication 4, caractérisée en ce que le réceptacle (18) comprend des parois latérales (20) destinées à venir en appui contre le fond (10) du plateau (8) formant la paroi supérieure du compartiment. 5. Installation according to claim 4, characterized in that the receptacle (18) comprises side walls (20) intended to bear against the bottom (10) of the plate (8) forming the upper wall of the compartment.
6. Installation selon la revendication 1, caractérisée en ce qu'elle comprend un moyen (22) de réchauffage du réceptacle (18) à produits. 6. Installation according to claim 1, characterized in that it comprises means (22) for heating the receptacle (18) for products.
7. Installation selon la revendication 6, caractérisée en ce que, les moyens d'adsorption (17) produisant un dégagement de chaleur lors de l'adsorption d'eau, les moyens d'adsorption (17) sont agencés de telle manière que le dégagement de chaleur contribue au réchauffement des produits. 7. Installation according to claim 6, characterized in that, the adsorption means (17) producing a release of heat during the adsorption of water, the adsorption means (17) are arranged in such a way that the release of heat contributes to the heating of the products.
8. Installation selon la revendication 7, caractérisée en ce que les moyens d'adsorption sont associés à. un organe de régulation thermique (14, 15, 16) . 8. Installation according to claim 7, characterized in that the adsorption means are associated with. a thermal regulation member (14, 15, 16).
EP05753686A 2004-04-06 2005-04-06 Dehydration installation using zeolites Active EP1740898B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0403579A FR2868520B1 (en) 2004-04-06 2004-04-06 INSTALLATION OF DEHYDRATION WITH ZEOLITES
PCT/FR2005/000837 WO2005100892A1 (en) 2004-04-06 2005-04-06 Dehydration installation using zeolites

Publications (2)

Publication Number Publication Date
EP1740898A1 true EP1740898A1 (en) 2007-01-10
EP1740898B1 EP1740898B1 (en) 2010-12-08

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ID=34945400

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EP05753686A Active EP1740898B1 (en) 2004-04-06 2005-04-06 Dehydration installation using zeolites

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EP (1) EP1740898B1 (en)
AT (1) ATE491126T1 (en)
DE (1) DE602005025204D1 (en)
DK (1) DK1740898T3 (en)
FR (1) FR2868520B1 (en)
WO (1) WO2005100892A1 (en)

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FR2925662B1 (en) * 2007-12-19 2010-01-29 Millerail INSTALLATION OF DEHYDRATION WITH ZEOLITES
FR2927408B1 (en) * 2008-02-11 2010-04-23 Millerail METHOD FOR CONTROLLING A DEHYDRATION FACILITY USING ZEOLITES
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TWI468157B (en) * 2009-04-29 2015-01-11 Intervet Int Bv Process to form a tablet, system for performing this process and package comprising the tablet
FR3076712B1 (en) 2018-01-15 2021-07-30 Innocress CRESSON TREATMENT PROCESS
FR3137960A1 (en) 2022-07-13 2024-01-19 Lgd Dehydration device and assembly, process for obtaining such an assembly

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WO2011124280A1 (en) 2010-04-08 2011-10-13 INSERM (Institut National de la Santé et de la Recherche Médicale) Zeodration method for the preservation of blood platelets

Also Published As

Publication number Publication date
ATE491126T1 (en) 2010-12-15
DK1740898T3 (en) 2011-03-21
EP1740898B1 (en) 2010-12-08
FR2868520A1 (en) 2005-10-07
DE602005025204D1 (en) 2011-01-20
FR2868520B1 (en) 2006-07-07
WO2005100892A1 (en) 2005-10-27

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