EP2225518B1 - Installation de déshydratation par zeolithes - Google Patents

Installation de déshydratation par zeolithes Download PDF

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Publication number
EP2225518B1
EP2225518B1 EP08872312.7A EP08872312A EP2225518B1 EP 2225518 B1 EP2225518 B1 EP 2225518B1 EP 08872312 A EP08872312 A EP 08872312A EP 2225518 B1 EP2225518 B1 EP 2225518B1
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EP
European Patent Office
Prior art keywords
cassette
container
enclosure
installation according
support
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.)
Active
Application number
EP08872312.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2225518A2 (fr
Inventor
Gilles Beurel
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
Original Assignee
Millerail
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Publication date
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Publication of EP2225518A2 publication Critical patent/EP2225518A2/fr
Application granted granted Critical
Publication of EP2225518B1 publication Critical patent/EP2225518B1/fr
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    • 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 plant using more particularly zeolites as adsorption means.
  • the invention is particularly 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 water molecules. These characteristics give the zeolite a water adsorption power of interest in the field of dehydration.
  • Dehydration by means of zeolites is generally carried out by means of an installation comprising an adjoining first enclosure and a second enclosure and in communication with each other.
  • the first chamber is designed to receive products to be dewatered and the second chamber receives zeolites and is equipped with an air suction pump contained in the enclosures.
  • the suction pump creates a vacuum in the enclosures that promotes the evaporation of the water contained in the products that are possibly heated. Water vapor passes into the second chamber where it is trapped in zeolites. This type of dehydration is particularly effective.
  • Such an installation comprises an enclosure, an air suction member contained in the enclosure, a product receptacle received in the enclosure and provided with an upper opening opposite which extends a bottom, permeable to air and with water, a cassette containing means for adsorbing moisture.
  • the cassette extends over the receptacle and defines therewith a compartment whose air is sucked through the adsorption means which maintain in the vicinity of the products the aromas which would escape during the evaporation of the water contained in the products.
  • the invention thus relates to a product dehydration installation, comprising an enclosure, an air suction member contained in the enclosure, a product receptacle received in the enclosure and provided with an upper opening facing of which extends a bottom, permeable to air and water, a cassette containing moisture adsorption means.
  • a seal extends between a periphery of the bottom of the cassette and an edge of the receptacle defining the opening.
  • the installation comprises means for relative movement of the cassette and the receptacle between a position of contact of the seal with the cassette and the edge of the receptacle and a detachment position of the seal and the cassette and / or the edge of the receptacle.
  • the enclosure contains at least one shelf, the receptacle and the cassette having side portions received in slides of a support, the cassette being suspended under an upper flange of the slides and the receptacle being movable between the contact position and the position in which the lateral parts of the receptacle rest on lower wings of the slideways, the support being movable between a high position in which the receptacle is detached from the shelf and rests by its lateral parts on the inner wings of the slides and a position in which the receptacle rests on the shelf and is in the contact position with respect to the cassette.
  • the seal is secured to a removable frame having surfaces of its lateral positioning on the receptacle and / or the cassette with, preferably, a lower peripheral rim. to which belong the lateral positioning surfaces and / or an upper peripheral rim to which the lateral positioning surfaces belong.
  • the positioning means ensures that the seal is in a correct position to perform its function.
  • the seal is made of a thermally insulating material.
  • the seal then makes it possible to isolate the heating means from the cassette by limiting heat transfer by conduction from the cassette to the receptacle.
  • a difference in temperature between the cassette and the products contained in the receptacle makes it possible to promote a condensation of the aromas.
  • the installation according to the invention comprises an enclosure generally designated at 1 which is delimited here by a blind tubular wall 2 having an open end sealingly closed by a door 3.
  • the chamber 1 is associated with an evacuation member schematized at 4 which comprises, in a manner known per se, a suction pump for the air contained in the chamber 1.
  • the shelves 20 are of thermally conductive material , here stainless steel or aluminum, and have an opposite edge to the passage 21 fixed to a pipe 22 for transporting a coolant ( figure 6 ).
  • the pipes 22 are substantially horizontal and are interconnected by collecting pipes 23 to form a circuit connected to a device 24 for heating and circulation of the coolant disposed outside the enclosure 1.
  • a module generally designated in 5 support of products to be dehydrated and zeolites is received in the chamber 1.
  • the support module 5 comprises a central armature 6 having two opposite faces 7 from which extend laterally projecting pairs of horizontal slideways 8 having a cross-sectional area. C with an upper wing 8.a and a lower wing 8.b (only one slide has been shown on the Figures 2 and 3 ).
  • Each pair of slides 8 receives a zeolite cassette 9.
  • Each cassette 9 comprises a bottom and an upper wall between which extend side walls having a height less than the distance between the wings 8.a, 8.b of the slides 8 between which the cassette 9 is received. More specifically, each cassette 9 has two opposite edges suspended under the upper wings 8.a, 8.b of the pair of slides 8 corresponding.
  • pins 10 extend from these projecting edges above the upper wall of the cassette 9 through openings 11 formed in the upper wings 8.a.
  • the pins 10 have a shouldered head and helical springs 12 extend around the pins 10 between the shoulder head and the wing 8.a.
  • the cassettes 9 receive unrepresented zeolites.
  • the upper part and the bottom of the cassettes 9 are formed by a grid (the bottom is represented symbolically on the Figures 2 and 3 ) having meshes retaining the zeolites while allowing the passage of air.
  • the grid forming the bottom has mesh allowing the passage of water vapor.
  • each pair of slides 8 are slidably received receptacles 13 to products.
  • Each receptacle 13 comprises a bottom and side walls of low height and has an upper opening 25 delimited by an edge 26. Two of the side walls, opposite to each other, are provided with the opposite of the bottom of a flange 14 projecting outwardly. Each flange 14 extends between the lower flange 8b and the corresponding cassette 9 so that the receptacle 13 extends under the cassette 9 and is vertically movable between two positions as will be explained later.
  • Each cassette assembly 9 / receptacle 13 has a height less than the distance separating two shelves 20.
  • the central armature 6 of the module 5 has an upper end secured to a carriage 15 suspended from an upper rail 16, parallel to the central axis of the enclosure 1, connected to the ceiling of the enclosure 1 by jacks 17 connected to a control unit, not visible in the figures, arranged to control the cylinders 17 so as to vertically move the rail 16 between a high position and a low position.
  • the central armature 6 of the module 5 has a lower end provided with rollers 18, vertical axes, rolling on two opposite faces of a lower rail 19 fixed in the lower part of the enclosure 1 parallel to the upper rail 16 to guide laterally the lower end of the central frame 6 of the module 5 and prevent it from swinging in the chamber 1.
  • a seal carrier frame 30 is removably received on each receptacle 13.
  • the seal carrier frame 30 comprises a web 31, horizontal and shaped corresponding to that of the upper opening 25 of the receptacle 13.
  • a seal 32 of thermally insulating material such as a silicone elastomer, is embedded in the inner periphery of the core 31. From the outer periphery of the core 31 project respectively upwardly and downwardly an upper rim 33 and a lower flange 34 forming lateral positioning surfaces of the seal carrier 30 relative to the cassette 9 on the one hand and the rim 14 of the receptacle 13 on the other hand.
  • the receptacle 13 on which the seal carrier 30 rests via the seal 32 is vertically movable in the slides 8 between a (high) contact position of the seal 32 with the cassette 9 and the edge 26 ( figure 2 ) and a position (low) of separation of the seal 32 and the cassette 9, the receptacle then resting by its edges 14 on the lower wings 8.b of the slides 8 ( figure 3 ).
  • the receptacles 13 are loaded with products to be dehydrated outside the enclosure 1 to facilitate loading.
  • a mobile gantry (not visible in the figures) provided with a rail which can be brought into the extension of the upper rail 16 so as to be able to completely out the module 5 of the enclosure 1.
  • the receptacles 13 are extracted from the slides 8 of the module 5 suspended from the gantry and loaded products to be dehydrated.
  • the seal-holder frame 30 is put back in place on each receptacle 13 which is then put back between the slideways 8.
  • the receptacles 13 are then in the detachment position.
  • the module 5 is then introduced into the chamber 1 by sliding it on the upper rail 16 in the high position so that below each shelf 20 extends a receptacle 13.
  • the door 3 is then closed.
  • the cylinders 17 are then controlled to bring the upper rail 16 in the low position.
  • the receptacles 13 come to bear against the shelves 20 and rest thereon and the cassettes 9 are brought into contact with the seals 32.
  • the receptacles are thus in the position of contact with respect to the cassettes 9. In the contact position, it will be noted that part of the weight of the cassette 9 is taken up by the slideways 8 via the springs 12 and is therefore not not on the receptacle 13 and therefore not on the corresponding shelf 20.
  • 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 receptacles 13 through the upper opening 25 thereof and through the bottom grid of the cassettes 9 before passing through the zeolites to flow into the space between the cassettes 9, the shelves 20 and the enclosure 1.
  • the seal 31 is taken between the bottom of the cassette 9 and the flange 14 extending laterally outwardly from the edge 26 of the opening 25.
  • the air is evacuated from the enclosure by the pump of the vacuum means 4.
  • the water contained in the products evaporates.
  • the water vapor thus created follows the same path as the air to the zeolites in the pores from which it is trapped.
  • the products are thus progressively dehydrated.
  • the air of the receptacle is sucked through the zeolites so that most of the aromas can not escape from the receptacle 13, the zeolites limiting the passage thereof to the outside of the receptacle 13 in the manner of a molecular sieve. As the zeolites are very close to the products, the aromas are therefore maintained in the vicinity of the products.
  • Shelves 20 are heated to prevent products from freezing under the effect of dehydration and the pressure drop in the chamber 1. It is also possible to take advantage of the exothermic nature of the adsorption to heat the products or at least to take account of it in the regulation of the heating temperature of the shelves 20.
  • the adsorption of water causes a rise in temperature of the zeolites.
  • the heat generated at the zeolites of the cassettes 9 is communicated in part to the products by radiation and by conduction via the slides 8 and the receptacles 13.
  • the thermally insulating material used for the seal 32 makes it possible to better control this heat input. and to avoid excessive heating of the products.
  • the heating of the products also makes it possible to increase the evaporation of the water.
  • This heating is controlled by means of a thermal regulator according to the information provided by unrepresented temperature sensors disseminated in the module 5.
  • These temperature sensors comprise, for example, temperature probes that pass through a portion of the cassettes to have a protruding end protruding into the receptacle and an opposite end which protrudes from the cassette and is electrically connected to the regulating member.
  • each cassette comprises two passage openings of the temperature probes, at least one of which is provided with a seal.
  • the temperature probe can pass through the wall of the receptacle.
  • the thermal regulator can maintain a temperature difference between the products and the immediate environment thereof. For example, a temperature of 20 ° at the product level and 70 ° at the environment thereof can be maintained. This difference in temperature causes condensation on the products of aromas that are kept in the compartment.
  • the installation may have a geometry different from that described.
  • the cassettes may be fixed in the enclosure 1, as well as the support module, particularly when the installation is a relatively low capacity installation.
  • the module may have a different number of receptacles.
  • Shelves may not be associated with heating means.
  • the vertical movement of the receptacles with respect to the cassettes can be obtained by the use of dedicated actuators on board the modules or integral with the enclosure, acting directly on the receptacles and / or cassettes, regardless of association with seals.
  • the seal may be overmoulded or embedded directly on a peripheral edge of the product receptacle or on a rim of the cassette.
  • the grids of cassettes 9 can be replaced by any structure (eg mesh or fabric) or material permeable to air and water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Drying Of Gases (AREA)
  • Drying Of Solid Materials (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP08872312.7A 2007-12-19 2008-12-11 Installation de déshydratation par zeolithes Active EP2225518B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0708906A FR2925662B1 (fr) 2007-12-19 2007-12-19 Installation de deshydratation par zeolithes
PCT/FR2008/001723 WO2009101302A2 (fr) 2007-12-19 2008-12-11 Installation de deshydratation par zeolithes

Publications (2)

Publication Number Publication Date
EP2225518A2 EP2225518A2 (fr) 2010-09-08
EP2225518B1 true EP2225518B1 (fr) 2016-07-27

Family

ID=39650986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08872312.7A Active EP2225518B1 (fr) 2007-12-19 2008-12-11 Installation de déshydratation par zeolithes

Country Status (10)

Country Link
US (1) US8316556B2 (zh)
EP (1) EP2225518B1 (zh)
CN (1) CN101903728B (zh)
BR (1) BRPI0821293A2 (zh)
CA (1) CA2709576C (zh)
CO (1) CO6311035A2 (zh)
DK (1) DK2225518T3 (zh)
ES (1) ES2599930T3 (zh)
FR (1) FR2925662B1 (zh)
WO (1) WO2009101302A2 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPO20150006A1 (it) * 2015-03-22 2016-09-22 Biancalani Srl Apparato di trascinamento fluidico di un tessuto in un tumbler di trattamento
CN113558074B (zh) * 2021-07-23 2022-12-27 全氏食品机械（上海）有限公司 真空冷冻干燥烘焙机
FR3137961A1 (fr) * 2022-07-13 2024-01-19 Lgd Procédé de gestion d’un système de déshydratation et système de déshydratation correspondant

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671526A (en) * 1951-11-20 1954-03-09 Niles Bement Pond Co Dehydrator plug
WO1987006608A1 (en) * 1986-04-25 1987-11-05 Digital Diagnostics Manifold vacuum device for chemical, biochemical, and immunological uses

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB239047A (en) * 1924-09-04 1925-09-03 Aridor Patents Ltd Improvements in and relating to caps or stoppers for containers
US2317882A (en) * 1940-05-31 1943-04-27 Charles F Boesel Absorbent closure cap for receptacles containing dry medicinal materials and the like
US2487620A (en) * 1946-03-08 1949-11-08 Waller Fred Desiccator
US2676078A (en) * 1950-07-21 1954-04-20 James Howard Young Canister
FR1217571A (fr) * 1959-02-27 1960-05-04 Emballage étanche
DE1178788B (de) * 1959-10-07 1964-09-24 Leybold Hochvakuum Anlagen Rohrfoermige, aus Teilkammern zusammen-gesetzte Vakuum-Gefriertrocknungsanlage
US4146277A (en) * 1978-06-29 1979-03-27 Santoro Dario S Desiccant cap
US4498608A (en) * 1982-04-05 1985-02-12 Mercil Robert A Moisture absorbent condiment container
NL8700497A (nl) * 1987-02-27 1988-09-16 Chemco Soest Bv Transportverpakking.
JPH089725Y2 (ja) * 1989-08-25 1996-03-21 富士写真フイルム株式会社 帯状感光材の包装体
US5813564A (en) * 1997-10-15 1998-09-29 Luo; Yi-Wen Cover structure for an airtight container
US7182820B2 (en) * 2002-04-17 2007-02-27 Magnatone Hearing Aid Corporation Methods and apparatus for cleaning a hearing aid device
FR2868520B1 (fr) * 2004-04-06 2006-07-07 Millennium Energy Sa Installation de deshydratation par zeolithes
DE102004049349A1 (de) * 2004-10-08 2006-04-13 Friedrich Sanner Gmbh & Co Kg Spritzgusswerk Spenderanordnung für Behälter
FR2927408B1 (fr) * 2008-02-11 2010-04-23 Millerail Procede de commande d'une installation de deshydratation au moyen de zeolites

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671526A (en) * 1951-11-20 1954-03-09 Niles Bement Pond Co Dehydrator plug
WO1987006608A1 (en) * 1986-04-25 1987-11-05 Digital Diagnostics Manifold vacuum device for chemical, biochemical, and immunological uses

Also Published As

Publication number Publication date
CA2709576C (fr) 2013-05-28
WO2009101302A3 (fr) 2009-10-15
DK2225518T3 (en) 2016-11-21
CN101903728B (zh) 2012-11-28
CA2709576A1 (fr) 2009-08-20
BRPI0821293A2 (pt) 2015-06-16
CN101903728A (zh) 2010-12-01
US8316556B2 (en) 2012-11-27
FR2925662B1 (fr) 2010-01-29
FR2925662A1 (fr) 2009-06-26
EP2225518A2 (fr) 2010-09-08
CO6311035A2 (es) 2011-08-22
US20100263222A1 (en) 2010-10-21
ES2599930T3 (es) 2017-02-06
WO2009101302A2 (fr) 2009-08-20

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