EP4554703A1 - Dispositif et ensemble de déshydratation, procédé d'obtention d'un tel ensemble - Google Patents
Dispositif et ensemble de déshydratation, procédé d'obtention d'un tel ensembleInfo
- Publication number
- EP4554703A1 EP4554703A1 EP23764678.1A EP23764678A EP4554703A1 EP 4554703 A1 EP4554703 A1 EP 4554703A1 EP 23764678 A EP23764678 A EP 23764678A EP 4554703 A1 EP4554703 A1 EP 4554703A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dehydration
- carrier fluid
- enclosure
- dehydration device
- interface
- 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.)
- Pending
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0454—Controlling adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/30—Controlling by gas-analysis apparatus
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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 for supplying or controlling air or other gases for drying solid materials or objects
- F26B21/20—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/25—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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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 for supplying or controlling air or other gases for drying solid materials or objects
- F26B21/30—Controlling, e.g. regulating, parameters of gas supply
- F26B21/33—Humidity
- F26B21/331—Humidity by using sorbent or hygroscopic materials, e.g. chemical substances or molecular sieves
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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 for supplying or controlling air or other gases for drying solid materials or objects
- F26B21/40—Arrangements for supplying or controlling air or other gases for drying solid materials or objects using gases other than air
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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
- F26B5/04—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/116—Molecular sieves other than zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/20—Organic adsorbents
- B01D2253/202—Polymeric adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/302—Dimensions
- B01D2253/308—Pore size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/403—Further details for adsorption processes and devices using three beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/0476—Vacuum pressure swing adsorption
Definitions
- the present invention relates to the field of dehydration and in particular that of dehydration installations.
- Dehydration generally corresponds to the removal of water present in a product. This operation can have various objectives, for example to allow a long conservation of a product, or to concentrate certain elements.
- Dehydration includes in particular the processes of drying or desiccation under vacuum.
- freeze-drying consists of the desiccation of a previously frozen product, by sublimation. Lyophilization is thus carried out by maintaining the product at a low temperature under vacuum.
- freeze-drying processes the water extracted from the products is generally condensed by a cold plate system and then discharged from the freeze-drying installation.
- Vacuum dehydrating has several main advantages. Lowering the boiling point and therefore working at a lower temperature makes it possible to preserve the qualities of the dehydrated product. Dehydrating in the absence of oxygen or in the presence of little oxygen prevents the oxidation of certain molecules.
- Vacuum dehydration processes generally involve the use of a condensation device, or may include the use of a water trap containing an adsorbent material.
- An installation for implementing such processes using an adsorbent material generally comprises an enclosure which receives bins of products to be dehydrated and assemblies containing the adsorbent material. Evacuating the enclosure causes evaporation of the water initially contained in the products and the water vapor thus produced is adsorbed by the adsorbent material.
- the main applications of the dehydration technologies referred to in the present invention concern the dehydration of food products, cosmetic products, and pharmaceutical products, bio-sourced products (for example wood), or products used in the composition of such products. food, cosmetics or pharmaceuticals, etc.
- document US2374232 discloses a vacuum dehydration device (in this case freeze-drying), using a desiccant material such as silica gel.
- a desiccant material such as silica gel.
- the product to be dehydrated is placed in a container which is in communication with a chamber which contains the desiccant material, which allows free gas exchange and a pressure balance between the container where the product is placed and the chamber which contains the desiccant material .
- the device and the process presented in this document concern in particular the conditions applied to the adsorbent, which can nevertheless be further optimized.
- Document FR2868520 also discloses a zeolite dehydration installation in which the product to be dehydrated is positioned in a receptacle which is received in a compartment, the whole being placed in an enclosure.
- the objective is to place the adsorbent as close as possible to the dehydrated product, which, for a food, would better preserve its taste properties.
- the whole is extracted from the enclosure for the regeneration of the zeolites. This manipulation is, however, complex, and increases the cycle times of the device.
- Document W02004/043574 discloses a drying system with a chamber and a drying device located upstream of a dehydration enclosure.
- a drying device can also be placed downstream of the dehydration enclosure, but only when it is in the regeneration phase, so that the water eliminated from the drying device during regeneration is carried away by the flow of humid air from of the dehydration chamber. It is proposed in this document to operate the drying system at a pressure below atmospheric pressure of up to 400 millibars below atmospheric pressure (600 millibars absolute pressure).
- the present invention aims to provide an optimized dehydration device.
- the invention relates to a dehydration device comprising a chamber and a drying device adapted to reduce the partial pressure of water vapor of a carrier fluid when said carrier fluid is in contact with said drying device or passes through it, said device dryer being placed in said chamber.
- the chamber has a separate inlet and an outlet arranged so that the water-laden carrier fluid entering the chamber via said inlet comes into contact with or passes through the drying device and exits through the outlet with a lower water content.
- the dehydration device also includes:
- a flow management module adapted to generate and control the flow of carrier fluid in the dehydration device, said flow management module being configured to apply, at the outlet of the dehydration device, a pressure of at least 500 millibars lower than atmospheric pressure, and control the relative humidity in the carrier fluid at the outlet of the dehydration device.
- the dehydration device comprises a device for compressing the carrier fluid, adapted to raise the pressure of said carrier fluid between the inlet interface of the dehydration device and the drying device.
- the device thus proposed is distinguished from known devices, in particular in the food field, operating in batches ("batch" according to the English terminology more common in the field) by a drying device, for example a water trap, deported from the dehydration chamber.
- a drying device for example a water trap
- This allows, if necessary, regeneration of an adsorbent material present in the water trap directly in the chamber, without special handling and without immobilizing the dehydration chamber.
- This makes it possible, for example, to unload and reload the enclosure with product to be dehydrated during the regeneration of the adsorbent material.
- this makes it possible to launch a new dehydration cycle in the dehydration chamber using a water trap other than the one whose adsorbent material is being regenerated.
- the present invention relates firstly to a dehydration device independently of the dehydration enclosure intended to receive the product to be dehydrated.
- This makes it possible in particular to use the dehydration device, thanks to the interfaces it includes, to equip and update a pre-existing dehydration installation.
- any pre-existing dehydration tunnel can be used to form a dehydration system according to the invention.
- the flow management module includes a technology device adapted to circulating the water vapor extracted from the products under vacuum: rotor pump type systems (see below ) or compressor can be used.
- vacuum is meant throughout this document a pressure lower than at least 500 millibars compared to atmospheric pressure, and preferably lower than 700 millibars compared to atmospheric pressure. This allows the product to be dried at relatively low temperatures (typically below 70°C) and therefore to less degrade the heat-sensitive molecules of the product.
- the flow management module also allows fine control of the dehydration conditions of the product which is processed, in order to preserve the desired properties (for example taste).
- the flow management module being configured to control vacuum dehydration, a vacuum is applied at the outlet of the dehydration device. Vacuum dehydration allows it to be carried out at low temperature, which preserves certain qualities of the product which is dehydrated.
- low pressure has a strong negative impact on the ability of the dryer device to reduce the partial pressure of water vapor in the carrier fluid.
- a low pressure level limits the adsorption capacity of materials such as silica gels or zeolites. This is why the invention provides a device for compressing the carrier fluid between the dehydration chamber and the drying device.
- this device for compressing the carrier fluid, once a dehydration system is constituted by connecting a dehydration enclosure to the dehydration device, it allows (for example under the control of the management system) to impose two levels of pressure in the system .
- a significant vacuum of at least 500 millibars with respect to atmospheric pressure, is imposed at the outlet of the dehydration device, and therefore in the dehydration enclosure where the product to be dehydrated is located.
- the dehydration device makes it possible to obtain different and optimized pressure conditions on the one hand for the dehydration of a product, and on the other hand for the reduction of the water content of the carrier fluid, in particular using a water trap.
- the carrier fluid compression device includes a positive displacement pump.
- a suitable positive displacement pump can be for example a beak pump or a lobe pump, in particular a pump generally referred to by the English expressions "roots pump” or “booster pump” comprising two bilobed rotors which rotate in a synchronized manner and which is suitable for operating under vacuum.
- a pump makes it possible to control the suction flow at the inlet of the device.
- a buffer tank forming a volume for receiving the carrier fluid, can be interposed between the device for compressing the carrier fluid and the inlet of the chamber.
- the buffer tank makes it possible to form a reserve of steam at excess pressure compared to the pressure in the dehydration chamber. This reserve allows better control of the pressure in the dryer device, and makes it possible to optimize the operation of the dryer device.
- the flow management module can further be adapted to control the mass flow of carrier fluid leaving the dehydration device via its output interface.
- the flow management module can also be adapted to control the temperature of the carrier fluid leaving the dehydration device via its output interface.
- the outlet of the chamber can be fluidly linked to the outlet of the dehydration device, via the flow management module.
- the carrier fluid is completely or partially re-circulated, that is to say the fluid leaving the dehydration enclosure is returned to said dehydration enclosure after its water content has been lowered by the device dryer.
- This closed, or partially closed, loop allows better conservation of molecules of interest (typically aromatic) in dehydrated products.
- the drying device may include an adsorbent material, suitable for adsorbing water present in the carrier fluid.
- the adsorbent material used may in particular comprise a zeolite.
- Zeolites are known for their water adsorption performance.
- the zeolite used may in particular be a 4 angstrom zeolite (or 4A zeolite), that is to say a type of aluminosilicate crystal with average pores measuring 4 angstroms (0.4 nm).
- an absorbent polymer including a biosourced polymer
- the drying device may include a system for condensing the water vapor present in the carrier fluid, for example a cold plate device.
- the flow management module can also include a vacuum source making it possible to reduce the pressure at the outlet interface of the dehydration device.
- the scanning means thus makes it possible to apply the pressure (that is to say, in practice, the vacuum level) desired for dehydration.
- the vacuum evaporation thus carried out requires a low energy input.
- the vacuum source may include a vacuum pump or a vacuum network.
- the vacuum supply is advantageously carried out, if necessary, according to instructions. This instruction can in particular be adapted depending on the nature of the dehydrated product.
- the invention also relates to a dehydration system comprising a dehydration device as described above and a dehydration enclosure, the dehydration enclosure being equipped with an entry interface into the dehydration enclosure fluidly connected to the outlet interface of the dehydration device and an outlet interface of the dehydration enclosure fluidly connected to the inlet interface of the dehydration device.
- the invention therefore also relates to the complete system, comprising the dehydration chamber.
- This enclosure can in particular be adapted to the dehydration of food (or other) products by evaporation under vacuum.
- the dehydration enclosure may include a set of shelves for receiving bins adapted to contain a product to be dehydrated.
- This configuration optimizes the ratio between the evaporation surface exposed by the product and the volume of the dehydration chamber.
- the carrier fluid used can be, for example, air or nitrogen.
- the dehydration system may include several drying devices, each drying device comprising an adsorbent material adapted to adsorb water present in the carrier fluid, the system being configured such that one of the drying devices is used to reduce the water content in the carrier fluid, while the adsorbent material from another of the drying devices is regenerated, and/or another drying device is used to dry the carrier fluid which enters the dehydration chamber.
- the device can thus operate, alternating the adsorption phases and the regeneration phases on different drying devices, for example different water traps. This greatly increases the time the dehydration chamber is used to dehydrate products.
- the invention finally relates to a method for obtaining a dehydration system as described above, by transforming a pre-existing dehydration installation. This process includes the following steps:
- the device proposed in the invention thanks to its drying device(s) remote from the dehydration chamber and thanks to its modular design, thus allows the modernization of pre-existing installations. This makes it possible, for example, to convert freeze-drying tunnels into a dehydration system according to the present invention.
- Figure 1 represents, according to a principle diagram, a dehydration device and a dehydration system conforming to embodiments of the present invention
- Figure 2 represents, according to a simplified industrial diagram, a dehydration system according to one embodiment of the invention.
- FIG. 1 represents, according to a block diagram, a dehydration system according to one embodiment of the present invention.
- the dehydration system comprises a dehydration device 1, which is primarily the subject of the present invention, and a dehydration enclosure 2 to which the dehydration device 1 is connected.
- the dehydration device 1 has an inlet interface of the dehydration device 3, through which a carrier fluid containing water in gaseous form enters the dehydration device for drying.
- the input interface of the dehydration device 3 is intended to be linked to an output interface of the corresponding dehydration enclosure 4.
- the carrier fluid is a gas, which can be air or advantageously nitrogen.
- the inlet interface of the dehydration device 3 and the outlet interface of the dehydration enclosure 4 provide a fluid connection between the dehydration enclosure 2 and the dehydration device 1. These interfaces can thus take various forms, they can be screwed, clamped, welded, etc.
- the dehydration device includes a flow management module 5.
- the flow management module 5 has the particular function of ensuring the circulation of the carrier fluid in the dehydration system, and thus controlling the relative humidity level in the dehydration enclosure 2. It also makes it possible to control the flow rates and the pressure in the dryer device 6 (described below).
- the flow management module is itself made up of two interoperating modules, namely a circulation module 7 and a scanning module 8.
- the circulation module 7 is positioned downstream of the inlet interface of the dehydration device 3.
- the circulation module aims firstly to generate and control the flow of carrier fluid in the dehydration device .
- it comprises mechanical equipment, of the rotor pump type (roots pump), or any other equipment adapted to operate under high vacuum and to manage the flow of the carrier fluid at the outlet of the dehydration enclosure and corollarily at the inlet of the drying device.
- This equipment also forms a device for compressing the carrier fluid.
- the compression device makes it possible to raise the pressure of the carrier fluid between the inlet interface of the dehydration device and the drying device.
- a buffer tank 9 can be placed between the mechanical equipment of the circulation module 7 and the dryer device 6.
- the buffer tank 9 allows better control and temporal smoothing of the operating conditions of the dryer device 6 (pressure and temperature) .
- the circulation module can be formed by a device controlling the pressure differential between the outlet and the inlet of the dehydration device. In this case it is essentially a pressure game between a vacuum source and a vent which can cause the flow of carrier fluid in the dehydration enclosure 2 and in the dehydration device 1.
- the carrier fluid introduced may be air or another dried gas into a second drying device 6' of the dehydration device.
- the circulation module can include a device for determining the relative humidity of the carrier fluid entering the dehydration device 1, for example a humidity sensor, and use this information for controlling the flow rates. in the dehydration system.
- a device for determining the relative humidity of the carrier fluid entering the dehydration device for example a humidity sensor, and use this information for controlling the flow rates. in the dehydration system.
- the dehydration device comprises, as mentioned above, a drying device 6, intended to capture the water present in the carrier fluid coming from the dehydration chamber.
- the drying device 6 is generally arranged in a chamber of the dehydration device.
- the drying device 6 makes it possible to reduce the quantity of water present in the carrier fluid which is present around the drying device or which passes through it.
- the drying device can thus include a cold plate device which causes the condensation of the water present in the form of vapor in the carrier fluid on the surface of said cold plates.
- the drying device may alternatively comprise a material suitable for adsorbing a significant quantity of water, called adsorbent material, under appropriate temperature and pressure conditions.
- Zeolites are known for their great capacity to adsorb water, without gaining volume, and can therefore be used as an adsorbent material for a water trap.
- the adsorbent material can be installed in a basket or a cassette placed in the chamber containing the drying device 6, so as to be brought into contact, or even to be crossed if necessary, by the vapor-laden carrier fluid which enters the trap with water.
- the flow control module 5 further comprises a scanning module 8.
- the scanning module 8 makes it possible in particular to control the quantity of air which enters the dehydration chamber 2.
- a vacuum source 10 for example a vacuum pump or a central vacuum (via a vacuum network).
- the dehydration device 1 comprises an outlet interface of the dehydration device 11, through which the dried carrier fluid leaves the dehydration device to be used for drying or evaporating a product in a dehydration chamber.
- the output interface of the dehydration device 11 is intended to be linked to an input interface of the corresponding dehydration enclosure 12.
- the outlet interface of the dehydration device 11 and the inlet interface of the dehydration enclosure 12 provide a fluid connection between the dehydration device 1 and the dehydration enclosure 2.
- these interfaces can take various forms, they can be screwed, clamped, welded, etc.
- the means described above of the dehydration device allow it to operate to dehydrate a product present in a dehydration enclosure 2 linked to said device, described in more detail below.
- the drying device is a water trap
- the adsorbent material having adsorbed a significant quantity of water must be regenerated by making it desorb the water it contains, so that it recovers its adsorption capacity.
- the dehydration device comprises a regeneration module 13.
- the regeneration module 13 makes it possible to place the adsorbent material of the water trap in temperature and pressure conditions suitable for its regeneration.
- the regeneration module can in particular be configured to carry out vacuum regeneration.
- the regeneration module 13 is selected and configured according to the general operating mode of the dehydration device. This can advantageously operate in vacuum-assisted adsorption, in particular in vacuum modulated adsorption (VSA according to the English acronym for “Vacuum Swing Adsorption”), in wherein a low pressure is imposed during regeneration and a relatively higher pressure is imposed during adsorption.
- VSA vacuum modulated adsorption
- the dehydration device thus developed is linked (via the input interface of the dehydration device 3 and the output interface of the dehydration device 11) to a dehydration enclosure 2 in order to form a dehydration system conforming to the invention.
- the dehydration enclosure 2 can be produced on purpose, or can alternatively be a pre-existing enclosure, for example a freeze-drying tunnel which one would like to develop into a system conforming to the present invention.
- the dehydration chamber 2 is adapted to receive the products to be dehydrated. It is suitable for operating at the target pressure during the dehydration of products.
- a generally tubular shape is therefore particularly well suited to systems operating at a high vacuum level.
- This enclosure can have large dimensions to allow the dehydration of products on an industrial scale.
- a tubular enclosure with an internal diameter of approximately 2.5 m and an internal length of 5 m can be used. These dimensions are given purely as an example. Systems whose chamber has a much larger volume can in particular be considered.
- Enclosure 2 includes a suction tube allowing the evacuation of the carrier fluid loaded with air (typically air and water vapor).
- the suction tube thus includes the output interface of enclosure 4.
- the enclosure 2 comprises an inlet pipe making it possible to ensure the supply of carrier fluid making it possible to ensure a sweeping flow in the enclosure 2.
- the inlet pipe thus comprises the inlet interface of the enclosure 12.
- suction pipe and the inlet pipe are chosen to promote uniform scanning of the interior volume of enclosure 2.
- the enclosure is obviously equipped with a door allowing the loading and unloading of the products to be dehydrated.
- the products can advantageously be loaded on trays or bins, suitable for food contact if necessary.
- the treated products can be in solid or liquid form (including pasty).
- the speaker configuration tends to maximize the exchange surface of the products with the carrier fluid, for example with air.
- the products to be dehydrated can be heated (however, under vacuum, dehydration is carried out at low temperature, which ensures that certain qualities of the treated products are not altered).
- a molecular preservation module 14 can be interposed in the flow of carrier fluid leaving the enclosure.
- the molecular preservation module 14 includes a molecular sieve so that only water in gaseous form leaves the enclosure with the carrier fluid, and not certain molecules of interest (aromatic compounds in particular) which are thus maintained in the environment of the product being dehydrated.
- the molecular preservation module 14, which is optional, can therefore be located at any point in the flow between the dehydration enclosure 2 and the flow management module 5: in the dehydration enclosure 2, between the dehydration enclosure 2 and the dehydration device 1, or at the inlet of the dehydration device 1.
- Figure 2 represents, according to a simplified industrial diagram (most of the valves, sensors, venting, and peripheral systems being omitted), an example of a dehydration system conforming to one embodiment of the invention.
- the system includes a dehydration chamber 2 in which the product to be dehydrated is placed.
- thermoregulating system 16 makes it possible to heat the product present in the dehydration chamber 2, using a heat transfer fluid.
- the dehydration device comprises, in the example shown, three drying devices, namely three water traps 6, 6', 6”. Each water trap features a bed of 4 Angstrom zeolite as the adsorbent material.
- the carrier fluid used is air, under low pressure.
- the flow is created in the device using a rotor pump from the circulation module 7 of the flow management module.
- the circulation module 7 is placed, in the example shown, downstream of the water traps 6, 6', 6”.
- the dehydration device is configured, with regard to these inlet pipes 17 (which are linked to the outlet interface of the enclosure 2), so that each water trap can be, or not be, crossed by the carrier fluid and the water vapor coming from the dehydration enclosure 2.
- a valve is thus provided at the inlet of each water trap to authorize or prohibit the entry of the carrier fluid charged with water vapor.
- only one of the water traps can be used to adsorb the water present in the carrier fluid coming from enclosure 2.
- the carrier fluid is dried by adsorption of the water vapor that it contains in the zeolite of the water trap passed through.
- the outlet tubes of the water trap are fluidically linked to the equipment of the circulation module 7 adapted to create the flow of carrier fluid.
- the carrier fluid then circulates towards the scanning module 8, via a return conduit 18.
- the scanning module 8 controls the flow of carrier fluid directed towards the inlet interface of the enclosure 2 via an outlet nozzle 19. If additional vacuum is necessary, the pressure can be reduced thanks to the vacuum source 9, here in the form of a vacuum pump.
- this supply can be carried out via a supply branch 20 which takes air from the atmosphere through a filter 21, and dries it in one of the traps water trap 6, 6', 6” of the dehydration device, different from the water trap then used to dry the carrier fluid coming from the dehydration enclosure 2.
- all of the dry carrier fluid introduced into the enclosure can come from the supply branch 20, while there is no return conduit 18 and that the circulation module has a vacuum pump (as equipment to generate the flow) which discharges the dried carrier fluid into the atmosphere.
- a water trap can be simultaneously regenerated.
- the regeneration module 13 ensures the heating of the air sucked into the regenerating water trap, while the vacuum source allows the depression of the water trap in order to carry out vacuum regeneration.
- the invention thus developed therefore makes it possible to first form a dehydration device, adapted to form a dehydration system when it is associated with a suitable dehydration enclosure.
- a scanning module makes it possible to control the dehydration conditions of the product which is treated, in order to preserve the desired properties (for example taste). It also makes it possible to optimize the conditions for adsorption of water by the adsorbent material of the water trap. Finally, it allows energy optimization of the dehydration process.
- the modular approach proposed in the invention, as well as the offset of the water traps with respect to the enclosure (allowed by circulation means adapted to create a flow under low pressure), also makes it possible to consider upgrade existing dehydration installations to a system conforming to the present invention.
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- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MA71456A MA71456A (fr) | 2022-07-13 | 2023-07-12 | Dispositif et ensemble de déshydratation, procédé d'obtention d'un tel ensemble |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2207226A FR3137960B1 (fr) | 2022-07-13 | 2022-07-13 | Dispositif et ensemble de déshydratation, procédé d’obtention d’un tel ensemble |
| PCT/FR2023/051080 WO2024013456A1 (fr) | 2022-07-13 | 2023-07-12 | Dispositif et ensemble de déshydratation, procédé d'obtention d'un tel ensemble |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4554703A1 true EP4554703A1 (fr) | 2025-05-21 |
Family
ID=83355399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23764678.1A Pending EP4554703A1 (fr) | 2022-07-13 | 2023-07-12 | Dispositif et ensemble de déshydratation, procédé d'obtention d'un tel ensemble |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4554703A1 (fr) |
| FR (1) | FR3137960B1 (fr) |
| MA (1) | MA71456A (fr) |
| WO (1) | WO2024013456A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2374232A (en) | 1939-11-02 | 1945-04-24 | Pfeiffer David Clifford | Desiccating apparatus |
| FR2805759B1 (fr) | 2000-03-01 | 2002-12-06 | Zedrys Zeolite Drying System | Procede d'adsorption reversible solide/gaz et dispositif pour la mise en oeuvre d'un tel procede |
| AT412999B (de) * | 2002-11-12 | 2005-09-26 | Wiedl Alfred | Anlage zum trocknen von gütern |
| FR2868520B1 (fr) | 2004-04-06 | 2006-07-07 | Millennium Energy Sa | Installation de deshydratation par zeolithes |
| AT510486B1 (de) * | 2010-09-15 | 2012-07-15 | Reiterbauer Alois | Verfahren zur trocknung und anlage zur durchführung des verfahrens |
| US10130115B1 (en) * | 2014-09-05 | 2018-11-20 | Joshua Butler | Systems and methods for food dehydration and optimization of organismal growth and quality of organismal products |
| CN114576986A (zh) * | 2022-03-14 | 2022-06-03 | 中冶节能环保有限责任公司 | 一种为机箱提供干燥空气的干燥方法及装置 |
-
2022
- 2022-07-13 FR FR2207226A patent/FR3137960B1/fr active Active
-
2023
- 2023-07-12 MA MA71456A patent/MA71456A/fr unknown
- 2023-07-12 WO PCT/FR2023/051080 patent/WO2024013456A1/fr not_active Ceased
- 2023-07-12 EP EP23764678.1A patent/EP4554703A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3137960B1 (fr) | 2024-08-09 |
| WO2024013456A1 (fr) | 2024-01-18 |
| FR3137960A1 (fr) | 2024-01-19 |
| MA71456A (fr) | 2025-04-30 |
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