EP2041026B2 - Cryogenic fluid injection system for processing products in bulk and method of cooling implementing said system - Google Patents

Cryogenic fluid injection system for processing products in bulk and method of cooling implementing said system Download PDF

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Publication number
EP2041026B2
EP2041026B2 EP07803959.1A EP07803959A EP2041026B2 EP 2041026 B2 EP2041026 B2 EP 2041026B2 EP 07803959 A EP07803959 A EP 07803959A EP 2041026 B2 EP2041026 B2 EP 2041026B2
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EP
European Patent Office
Prior art keywords
valve
injection device
cryogenic fluid
central
channel
Prior art date
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EP07803959.1A
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German (de)
French (fr)
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EP2041026B1 (en
EP2041026A2 (en
Inventor
Hervé Flamant
Olivier Pouchain
Jacques Fouche
Jo Algoet
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Priority to PL07803959T priority Critical patent/PL2041026T3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/12—Devices using other cold materials; Devices using cold-storage bodies using solidified gases, e.g. carbon-dioxide snow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F2035/98—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/91—Heating or cooling systems using gas or liquid injected into the material, e.g. using liquefied carbon dioxide or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/3073—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a deflector acting as a valve in co-operation with the outlet orifice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/32—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening
    • B05B1/323—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening the valve member being actuated by the pressure of the fluid to be sprayed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air

Definitions

  • the present invention relates to a device intended to inject, into an enclosure, a cryogenic fluid, under a pressure greater than that which prevails in the enclosure.
  • a known device for implementing this process comprises several injection devices, arranged in the bottom of the tank, and supplied with liquid CO 2 by a set of pipes, this set being provided with a common control valve, unique.
  • a device intended to inject into an enclosure a liquid capable of solidifying by expansion is known from the document EP-A-376 823 .
  • the patent EP-744 578 describes an injection device making it possible to avoid the inconveniences caused by blockage incidents under normal conditions of use. This device is such that the connection between the stop valve and the injection nozzle is calculated so that a blockage possibly formed in said connection and said nozzle following a closing of the injection valve can be expelled towards the enclosure by the liquid under pressure when the injection valve is reopened.
  • the device does not include means to prevent the formation of a blockage, but the expulsion of this blockage is possible as soon as it is restarted, so that it is possible to carry out a new injection at any time after the end of a previous injection period.
  • this device can be blocked by the entry of the material to be cooled into the injection device, and therefore the use of this device is limited to the cooling of solid products.
  • the present invention relates to an injection device intended to be fixed on the lower part of a container containing a product to be cooled in bulk, said injection device comprising a hollow cylindrical body in which is inserted a valve forced by a spring, said injection device comprising a through channel substantially parallel to said valve intended to be supplied with cryogenic fluid under pressure, one end of said through channel being connected to the cryogenic fluid supply system and the opposite end opening at the level of the valve seat.
  • the spring is calibrated such that the valve cannot slide without being subjected to a pressure of the cryogenic fluid at least equal to a threshold pressure.
  • a pressure of the cryogenic fluid at least equal to a threshold pressure.
  • the device according to the invention it is impossible for material contained in the enclosure to be introduced into the device and create blockages requiring dismantling and cleaning, whatever the physical state of this material.
  • the device according to the invention is therefore suitable for cooling products in liquid, pasty, solid or granular form.
  • pasty product we mean any product whose viscosity is between liquid and solid.
  • the device can advantageously replace the top cooling devices of tanks containing liquid or powdery products for which the prior art bottom cooling systems were not suitable.
  • the cryogenic fluid used is liquid nitrogen or liquid CO 2 , particularly when the product to be cooled is a food product.
  • the device according to the invention can be implemented with any type of cryogenic fluid.
  • the device can include several transverse channels, one of the ends of which opens at the level of the valve seat.
  • the device comprises n through channels, n being between 1 and 20, an even number, their number increases when the pressure of use of the cryogenic fluid decreases, said channels being arranged symmetrically with respect to the longitudinal axis of the valve.
  • two channels are arranged symmetrically with respect to the longitudinal axis of the valve.
  • the device of the invention is subjected to very significant temperature differences.
  • the wall of the enclosure on which the device is fixed is generally at room temperature, while the opposite part of the device which receives the supply of cryogenic fluid is at a temperature of -196°C. Icing phenomena on the external surface of the enclosure are therefore inevitable. There may therefore be sticking to the frosted wall of the enclosure of the material to be cooled.
  • the icing points become attachment points for the product contained in the enclosure. These points enlarge and eventually block the valve, no longer allowing the injection of cryogenic fluid.
  • a thermal bridge that is to say to insert a part of insulating material between the element of the device in direct connection with the arrival of cryogenic fluid and the element of the device placed directly on the wall of the tank, the constituent elements then being dissociable.
  • the thermal break can be made of any insulating material, in particular polymer resin or any other insulating plastic material.
  • the various constituent elements are made of steel, preferably of stainless steel with the exception of the thermal bridge which is made of an insulating material.
  • the different constituent elements are held together using a quick-disassembly connection or of the screwed or bayonet type or the like.
  • the device according to the invention must be able to be dismantled in particular with a view to calibrating the spring forcing the valve, or for cleaning which is obligatory in the case of food products and which may be made necessary by abnormal operation or even by pollution. accidental.
  • the device is connected to the cryogenic fluid supply via a flexible fluid conduit. This is to allow rapid dismantling. In fact, the flexible conduit does not have to be dismantled for cleaning.
  • cleaning is further facilitated by maintaining the various constituent parts using a quick mechanical holding system (“quick” connection).
  • quick mechanical holding system (“quick” connection).
  • the device of the invention being intended to be used under pressure, means are provided so that only authorized personnel can dismantle the device.
  • the constituent parts of the device are fixed together using tamper-proof screws and an anti-whiplash cable is fixed on the one hand to the flexible pipe, and on the other hand on either side of the “quick” connection, on the lower part of the device and on the upper part of it. Removal of the whip antibody cable is only possible using a specific key whose use is reserved for persons empowered.
  • the device according to the invention is fixed tangentially to the previously perforated wall of the enclosure.
  • the enclosure is a mixer
  • part of the cryogenic fluid is already transformed into a solid before coming into contact with the mass to be cooled.
  • the cryogenic solid is formed as soon as the fluid hits the valve seat in the space between the seat and the support. Taking into account the fact that it is the cryogenic solid which comes into contact with the material to be cooled, the cooling efficiency is therefore greater than that obtained with the devices of the prior art.
  • the product can of course be moving in the enclosure, which promotes heat exchange and therefore cooling of the contents.
  • the device according to the invention is fixed to the lower part of the mixing tank.
  • FIG. 1 shows the lower part of an enclosure 1 on the wall of which are fixed, preferably by welding, two cryogenic fluid injection devices 3 conforming to the invention.
  • the devices 3 are connected by a flexible pipe 4 and a heat-insulated pipe 5 to a solenoid valve 6 allowing the opening and closing of the supply of cryogenic fluid.
  • FIG 2 shows in more detail an injection device 3, comprising an upper part 7 whose free end 8 is intended to be fixed on the external wall of an enclosure, and a lower part 9, the two parts being connected by a connector rapid 10.
  • a flexible pipe 4 is connected to the lower part 9 of said device 3.
  • a whipping cable 11 connecting the flexible pipe 4, the lower part 9 and the upper part 7. This cable is fixed using hooks safety 12 so that only authorized people can undo it, for example for dismantling.
  • the injection device 3 comprises a body composed of two parts made integral, the lower part 9 and the upper part 7.
  • the upper part is itself made up of 3 elements, a substantially cylindrical external wall 14 made of stainless steel, one end of which comes indirectly to rest on the lower part 9 and the other end of which is intended to be fixed on the wall of the enclosure.
  • a piece of complementary shape called a thermal bridge, also hollow, insulating, inside which is placed a third element 16 in stainless steel crossed in its center by the valve 17 and by two through channels 18 opening onto the beveled upper part of the part 16 intended to receive the seat 13 of the valve 17.
  • the central through opening of the part 16 comprises three zones, a central zone 19a of diameter substantially equal to that of the valve so that the valve can be placed sliding in this zone and a lower zone 19b of greater diameter, of such that it can receive around the axis of the valve the spring 19 forcing it.
  • This spring 19 being held by the shoulder 20 formed between zones 19a and 19b.
  • the zone 19c is of beveled shape, of wider diameter at its free end, the shape of the bevel being adapted to sealingly receive the valve seat when the valve is forced by the spring.
  • the lower part 9 is made up of a single stainless steel element, of generally cylindrical shape. This part has a central blind recess 21 which when the device is mounted coincides with the opening 19b of the upper part. This recess is intended to receive the end of the valve held by the spring 19 and the calibration nut 22 of the spring.
  • connection 26 It also comprises on either side of the blind recess two vertical channels 23, 24 which in the mounting position open at one end each into a through channel 18 and the other end into a perpendicular channel 25, one of which one end opens onto channel 23 and the other is intended to be connected to the cryogenic fluid supply system via connection 26.
  • the lower part 9 is fixed to the central part 16 by screws 27 and 28.
  • Screw 28 is an anti-disassembly screw allowing compliance with safety standards for pressure devices.
  • Parts 14 and 15 are made integral with part 9 by connection 10 (shown on the figure 2 ).
  • Connection 10 is a quick release connection. It could also be of the screwed or bayonet type or the like.
  • valve 6 In operation, the valve 6 is open, and the cryogenic fluid is sent through the pipes 5 then the flexible 4 into the interior of the device 3, through the channel 25 then each of the channels 18.
  • the pressurized fluid then exerts a pressure on the valve seat, a space is then formed between part 19c and the valve seat.
  • the cryogenic solid begins to form in this space by the impact between the fluid and the valve seat, and is forced inside the enclosure.
  • valve 6 When it is necessary to stop the supply of cryogenic fluid, valve 6 is closed.
  • the invention also relates to the use of an injection device as described above for the cooling of bulk product.
  • It also relates to a process for cooling bulk material contained in an enclosure, according to which a cryogenic fluid is injected into the heart of the material to be cooled using at least one injection device, preferably m injection distributed symmetrically in the lower part of the enclosure, m being an integer between 2 and 20, preferably an even number.
  • the enclosure is a mixer.
  • the process is particularly well suited to cooling any type of material whatever its physical state, particularly for liquid, pasty, solid or powdery products.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

La présente invention est relative à un dispositif destiné à injecter, dans une enceinte, un fluide cryogénique, sous une pression supérieure à celle qui règne dans l'enceinte.The present invention relates to a device intended to inject, into an enclosure, a cryogenic fluid, under a pressure greater than that which prevails in the enclosure.

Il est connu de refroidir le contenu d'un malaxeur ou d'un pétrin en introduisant du CO2 liquide ou de l'azote liquide (LN2) à la base de la cuve du malaxeur ou pétrin. Le CO2 liquide, introduit sous pression par l'intermédiaire d'une buse d'injection, se transforme, dès sa détente, dans la buse, en solide (neige carbonique), et en gaz froid. Le solide se mélange au contenu du malaxeur et le refroidit, cependant que le gaz froid contribue également au refroidissement en traversant l'ensemble de la masse contenue dans la cuve.It is known to cool the contents of a mixer or a mixer by introducing liquid CO 2 or liquid nitrogen (LN2) at the base of the mixer or mixer tank. The liquid CO 2 , introduced under pressure via an injection nozzle, is transformed, upon expansion, in the nozzle, into a solid (dry ice), and into cold gas. The solid mixes with the contents of the mixer and cools it, while the cold gas also contributes to the cooling by passing through the entire mass contained in the tank.

Un dispositif connu pour la mise en oeuvre de ce procédé comporte plusieurs dispositif d'injections, disposés dans le fond de la cuve, et alimentés en CO2 liquide par un ensemble de canalisations, cet ensemble étant pourvu d'une vanne de commande commune, unique.A known device for implementing this process comprises several injection devices, arranged in the bottom of the tank, and supplied with liquid CO 2 by a set of pipes, this set being provided with a common control valve, unique.

Lors d'une fermeture de la vanne, le CO2 liquide qui se trouve dans les canalisations en aval de cette vanne ne peut être évacué très rapidement par les dispositif d'injections, et, lorsque la pression tombe au-dessous de 5,18 bars environ dans les canalisations, il se transforme en neige carbonique dans ces canalisations qui sont ainsi obstruées. Il est donc impossible de reprendre l'injection tant que cette neige n'a pas disparu en se transformant en gaz par réchauffement.When the valve closes, the liquid CO 2 which is in the pipes downstream of this valve cannot be evacuated very quickly by the injection devices, and when the pressure falls below 5.18 bars in the pipes, it transforms into dry ice in these pipes which are thus blocked. It is therefore impossible to resume the injection until this snow has disappeared, transforming into gas through heating.

Le document US-3 848 624 illustre l'état de la technique des vannes de régulation du débit de fluides cryogéniques diphasiques liquide/solide.The document US-3,848,624 illustrates the state of the art of valves for regulating the flow of liquid/solid two-phase cryogenic fluids.

On peut prévoir que les conduites reliant la vanne aux dispositif d'injections sont flexibles, ce qui permet un démontage, et par conséquent permet d'accélérer la remise en marche du système. Ce démontage est cependant une opération relativement longue et pénible.It can be expected that the pipes connecting the valve to the injection devices are flexible, which allows dismantling, and therefore allows the restarting of the system to be accelerated. This dismantling is, however, a relatively long and painful operation.

Les mêmes inconvénients subsistent si, au lieu d'une vanne commune à tous les dispositif d'injections, il est prévu plusieurs vannes indépendantes, reliées chacune à un dispositif d'injection par un conduit flexible distinct : des bouchages se produisent alors dans le conduit flexible.The same disadvantages remain if, instead of a valve common to all the injection devices, several independent valves are provided, each connected to an injection device by a separate flexible conduit: blockages then occur in the conduit flexible.

Il a été constaté que les bouchages se produisent lorsque la pression du CO2 liquide devient inférieure à 14 bars, ce qui arrive assez fréquemment lorsqu'on utilise des récipients de stockage dits "super-isolés", qui sont par ailleurs souvent préférés dans le but de limiter les pertes thermiques.It has been noted that blockages occur when the pressure of the liquid CO 2 falls below 14 bars, which happens quite frequently when using so-called "super-insulated" storage containers, which are also often preferred in the aim of limiting thermal losses.

Un dispositif destiné à injecter dans une enceinte un liquide susceptible de se solidifier par détente est connu du document EP-A-376 823 .A device intended to inject into an enclosure a liquid capable of solidifying by expansion is known from the document EP-A-376 823 .

Le Brevet EP-744 578 décrit un dispositif d'injection permettant d'éviter les inconvénients provoqués par les incidents de bouchage dans les conditions normales d'utilisation. Ce dispositif est tel que la liaison entre la vanne d'arrêt et la buse d'injection est calculée pour qu'un bouchon éventuellement formé dans ladite liaison et ladite buse à la suite d'une fermeture de la vanne d'injection puisse être expulsé vers l'enceinte par le liquide sous pression lors de la réouverture de la vanne d'injection.The patent EP-744 578 describes an injection device making it possible to avoid the inconveniences caused by blockage incidents under normal conditions of use. This device is such that the connection between the stop valve and the injection nozzle is calculated so that a blockage possibly formed in said connection and said nozzle following a closing of the injection valve can be expelled towards the enclosure by the liquid under pressure when the injection valve is reopened.

Ainsi le dispositif ne comporte pas de moyens pour empêcher la formation de bouchon, mais l'expulsion de ce bouchon est possible dès la remise en marche, si bien qu'il est possible de procéder à une nouvelle injection à n'importe quel moment après la fin d'une période antérieure d'injection. Cependant, il s'avère que ce dispositif peut être bouché par l'entrée de la matière à refroidir dans le dispositif d'injection, et de ce fait l'utilisation de ce dispositif est limitée au refroidissement de produit solide.Thus the device does not include means to prevent the formation of a blockage, but the expulsion of this blockage is possible as soon as it is restarted, so that it is possible to carry out a new injection at any time after the end of a previous injection period. However, it turns out that this device can be blocked by the entry of the material to be cooled into the injection device, and therefore the use of this device is limited to the cooling of solid products.

Il existe donc un réel besoin en un dispositif d'injection de fluide cryogénique ne présentant pas les problèmes rencontrés avec les dispositifs de l'art antérieur et pouvant permettre le refroidissement de tout type de produit quel que soit son état physique.There is therefore a real need for a cryogenic fluid injection device which does not present the problems encountered with the devices of the prior art and which can allow the cooling of any type of product whatever its physical state.

Ainsi la présente invention porte sur un dispositif d'injection destiné à être fixé sur la partie inférieure d'un récipient contenant un produit à refroidir en vrac, ledit dispositif d'injection comprenant un corps cylindrique creux dans lequel est insérée une soupape forcée par un ressort, ledit dispositif d'injection comprenant un canal traversant sensiblement parallèle à ladite soupape destiné à être alimenté en fluide cryogénique sous pression, une extrémité dudit canal traversant étant relié au système d'alimentation en fluide cryogénique et l'extrémité opposée débouchant au niveau du siège de la soupape.Thus the present invention relates to an injection device intended to be fixed on the lower part of a container containing a product to be cooled in bulk, said injection device comprising a hollow cylindrical body in which is inserted a valve forced by a spring, said injection device comprising a through channel substantially parallel to said valve intended to be supplied with cryogenic fluid under pressure, one end of said through channel being connected to the cryogenic fluid supply system and the opposite end opening at the level of the valve seat.

Le ressort est taré de telle sorte que la soupape ne puisse pas coulisser sans être soumise à une pression du fluide cryogénique au moins égale à une pression seuil. Ainsi dès que la pression de fluide cryogénique est inférieure à un seuil déterminé, la pression nécessaire pour faire coulisser la soupape ne sera plus atteinte et le siège de soupape se repositionnera de façon étanche contre la paroi support.The spring is calibrated such that the valve cannot slide without being subjected to a pressure of the cryogenic fluid at least equal to a threshold pressure. Thus, as soon as the cryogenic fluid pressure is below a determined threshold, the pressure necessary to slide the valve will no longer be reached and the valve seat will reposition itself in a sealed manner against the support wall.

Grâce au dispositif conforme à l'invention, il est impossible que de la matière contenue dans l'enceinte puisse s'introduire dans le dispositif et créer des obturations nécessitant un démontage et nettoyage, et ce quelque soit l'état physique de cette matière.Thanks to the device according to the invention, it is impossible for material contained in the enclosure to be introduced into the device and create blockages requiring dismantling and cleaning, whatever the physical state of this material.

Le dispositif selon l'invention est donc adapté au refroidissement de produit aussi bien sous forme liquide, que pâteuse, solide ou granulaire.The device according to the invention is therefore suitable for cooling products in liquid, pasty, solid or granular form.

Par « produit pâteux », on entend tout produit dont la viscosité est comprise entre liquide et solide.By “pasty product”, we mean any product whose viscosity is between liquid and solid.

Le dispositif pourra avantageusement remplacer les dispositifs de refroidissement par le haut des cuves contenant des produits liquides ou pulvérulents pour lesquels les systèmes de l'art antérieur de refroidissement par le bas n'étaient pas adaptés.The device can advantageously replace the top cooling devices of tanks containing liquid or powdery products for which the prior art bottom cooling systems were not suitable.

Le fluide cryogénique utilisé est de l'azote liquide ou du CO2 liquide notamment quand le produit à refroidir est un produit alimentaire. Cependant, le dispositif selon l'invention peut être mis en oeuvre avec tout type de fluide cryogénique.The cryogenic fluid used is liquid nitrogen or liquid CO 2 , particularly when the product to be cooled is a food product. However, the device according to the invention can be implemented with any type of cryogenic fluid.

Le choix du ressort et son tarage sont bien entendu fonction du fluide cryogénique qui est utilisé. Ainsi pour de l'azote il doit pouvoir être taré typiquement entre 0 et 7 bars et pour le CO2 jusqu'à 25 bars.The choice of spring and its calibration are of course a function of the cryogenic fluid that is used. So for nitrogen it must be able to be calibrated typically between 0 and 7 bars and for CO 2 up to 25 bars.

Afin d'optimiser le fonctionnement de la soupape, le dispositif peut comporter plusieurs canaux tranversaux dont l'une des extrémités débouche au niveau du siège de la soupape. Ainsi, selon un mode de réalisation avantageux, le dispositif comprend n canaux traversant, n étant compris entre 1 et 20,un nombre pair, leur nombre augmente lorsque la pression d'utilisation du fluide cryogénique diminue, lesdits canaux étant disposés symétriquement par rapport à l'axe longitudinal de la soupape. Selon un mode de réalisation particulièrement avantageux, deux canaux sont disposés symétriquement par rapport à l'axe longitudinal de la soupape.In order to optimize the operation of the valve, the device can include several transverse channels, one of the ends of which opens at the level of the valve seat. Thus, according to an advantageous embodiment, the device comprises n through channels, n being between 1 and 20, an even number, their number increases when the pressure of use of the cryogenic fluid decreases, said channels being arranged symmetrically with respect to the longitudinal axis of the valve. According to a particularly advantageous embodiment, two channels are arranged symmetrically with respect to the longitudinal axis of the valve.

Le dispositif de l'invention est soumis à des différences de températures très importantes. En effet, la paroi de l'enceinte sur laquelle est fixé le dispositif est généralement à la température ambiante, alors que la partie opposée du dispositif qui reçoit l'alimentation en fluide cryogénique est à une température de -196°C. Des phénomènes de givrage de la surface externe de l'enceinte sont donc inévitables. Il peut donc y avoir collage sur la paroi givrée de l'enceinte de la matière à refroidir. Les points de givrage deviennent des points d'accroche du produit contenu dans l'enceinte. Ces points s'agrandissent et finissent par obturer la soupape, ne permettant plus l'injection de fluide cryogénique.The device of the invention is subjected to very significant temperature differences. In fact, the wall of the enclosure on which the device is fixed is generally at room temperature, while the opposite part of the device which receives the supply of cryogenic fluid is at a temperature of -196°C. Icing phenomena on the external surface of the enclosure are therefore inevitable. There may therefore be sticking to the frosted wall of the enclosure of the material to be cooled. The icing points become attachment points for the product contained in the enclosure. These points enlarge and eventually block the valve, no longer allowing the injection of cryogenic fluid.

Afin d'éviter ces phénomènes de givrage, selon un mode de réalisation avantageux, il est prévu de disposer un pont thermique, c'est-à-dire d'insérer une pièce en matériau isolant entre l'élément du dispositif en liaison directe avec l'arrivée de fluide cryogénique et l'élément du dispositif placée directement sur la paroi de la cuve, les éléments constitutifs étant alors dissociables.In order to avoid these icing phenomena, according to an advantageous embodiment, it is planned to have a thermal bridge, that is to say to insert a part of insulating material between the element of the device in direct connection with the arrival of cryogenic fluid and the element of the device placed directly on the wall of the tank, the constituent elements then being dissociable.

La rupture pont thermique peut être réalisée en tout matériau isolant, notamment en résine polymère ou toute autre matière plastique isolante.The thermal break can be made of any insulating material, in particular polymer resin or any other insulating plastic material.

Selon un mode de réalisation particulier, le dispositif conforme à l'invention comprend :

  • un élément inférieur, qui en position de fonctionnement est le plus éloigné de la paroi de l'enceinte et qui est relié au système d'alimentation en fluide cryogénique,
  • un élément central dont l'extrémité inférieure est en appui sur l'élément inférieur,
  • une soupape placée en coulissement dans un trou traversant pratiqué axialement dans l'élément central, le siège de la soupape étant en appui hermétique contre la partie supérieure biseautée dudit trou traversant,
  • un pont thermique entourant l'élément central et dont l'extrémité inférieure est en appui sur l'élément inférieur,
  • un élément de paroi entourant le pont thermique dont l'extrémité inférieure est en appui sur le bord inférieur du pont thermique et dont l'extrémité supérieure est destinée à être fixée sur la paroi de l'enceinte,
ledit élément inférieur comprenant :
  • au moins un canal d'alimentation dont une extrémité est en liaison avec le système d'alimentation et l'autre extrémité est en liaison avec une extrémité d'un canal traversant présent dans l'élément central, ledit canal traversant étant sensiblement parallèle à l'axe de la soupape, son autre extrémité débouchant au niveau du siège de la soupape,
  • un évidement aveugle central destiné à recevoir l'extrémité libre de l'axe de la soupape entouré d'un ressort de tarage,
ledit trou traversant de la partie centrale présentant en son extrémité inférieure un diamètre supérieur de telle sorte qu'en position de montage, le ressort de tarage soit maintenu contre ledit épaulement dans le trou central de plus grand diamètre et dans l'évidement central de l'élément inférieur.According to a particular embodiment, the device according to the invention comprises:
  • a lower element, which in the operating position is furthest from the wall of the enclosure and which is connected to the cryogenic fluid supply system,
  • a central element whose lower end rests on the lower element,
  • a valve placed sliding in a through hole made axially in the central element, the seat of the valve being in hermetic support against the beveled upper part of said through hole,
  • a thermal bridge surrounding the central element and whose lower end rests on the lower element,
  • a wall element surrounding the thermal bridge whose lower end rests on the lower edge of the thermal bridge and whose upper end is intended to be fixed to the wall of the enclosure,
said lower element comprising:
  • at least one supply channel, one end of which is connected to the supply system and the other end is connected to one end of a through channel present in the central element, said through channel being substantially parallel to the the axis of the valve, its other end opening at the level of the valve seat,
  • a central blind recess intended to receive the free end of the valve shaft surrounded by a calibration spring,
said through hole in the central part having at its lower end a greater diameter so that in the mounting position, the calibration spring is held against said shoulder in the central hole of larger diameter and in the central recess of the lower element.

De façon avantageuse, les différents éléments constitutifs sont réalisés en acier, de préférence en acier inoxydable à l'exception du pont thermique qui est réalisé en un matériau isolant.Advantageously, the various constituent elements are made of steel, preferably of stainless steel with the exception of the thermal bridge which is made of an insulating material.

De façon avantageuse, les différents éléments constitutifs sont maintenus ensemble à l'aide d'un raccord à démontage rapide ou du type vissé ou à baïonnette ou analogue.Advantageously, the different constituent elements are held together using a quick-disassembly connection or of the screwed or bayonet type or the like.

Le dispositif selon l'invention doit pouvoir être démonté en vue notamment du tarage du ressort forçant la soupape, ou d'un nettoyage qui est obligatoire en cas de produits alimentaires et qui peut être rendu nécessaire par un fonctionnement anormal ou encore, par une pollution accidentelle.The device according to the invention must be able to be dismantled in particular with a view to calibrating the spring forcing the valve, or for cleaning which is obligatory in the case of food products and which may be made necessary by abnormal operation or even by pollution. accidental.

Selon un mode de réalisation avantageux, le dispositif est relié à l'alimentation en fluide cryogénique par l'intermédiaire d'un conduit flexible fluidique. Ceci afin de permettre un démontage rapide. En effet, le conduit flexible n'a pas à être démonté pour le nettoyage.According to an advantageous embodiment, the device is connected to the cryogenic fluid supply via a flexible fluid conduit. This is to allow rapid dismantling. In fact, the flexible conduit does not have to be dismantled for cleaning.

Suivant un mode de réalisation préférée, le nettoyage est encore facilité par le maintien des différentes pièces constitutives à l'aide d'un système de maintient mécanique rapide(raccord « rapide »).According to a preferred embodiment, cleaning is further facilitated by maintaining the various constituent parts using a quick mechanical holding system (“quick” connection).

Suivant un mode de réalisation préférée, le dispositif de l'invention étant destiné à être utilisé sous pression, des moyens sont prévus pour que seul le personnel autorisé puisse démonter le dispositif. A cet effet, les parties constitutives du dispositif sont fixées entre elles à l'aide de vis inviolables et un câble anti-coup de fouet est fixé d'une part sur le tuyau flexible, d'autre part de part et d'autre du raccord « rapide » , sur la partie basse du dispositif et sur la partie haute de celui-ci. Le retrait du câble anticorps de fouet n'est possible qu'en utilisant une clé spécifique dont l'utilisation est réservée aux personnes habilitées.According to a preferred embodiment, the device of the invention being intended to be used under pressure, means are provided so that only authorized personnel can dismantle the device. For this purpose, the constituent parts of the device are fixed together using tamper-proof screws and an anti-whiplash cable is fixed on the one hand to the flexible pipe, and on the other hand on either side of the “quick” connection, on the lower part of the device and on the upper part of it. Removal of the whip antibody cable is only possible using a specific key whose use is reserved for persons empowered.

Le dispositif selon l'invention est fixé de façon tangentielle sur la paroi préalablement perforée de l'enceinte. Dans le cas où l'enceinte est un malaxeur, il est avantageux de disposer les dispositifs à environ 45° des bras de malaxage dans un secteur compris entre un angle de 0° (c'est à dire vertical) à 50° par rapport à un angle de 90° (c'est à dire horizontal aux bras de malaxage) de telle sorte que le fluide cryogénique soit injecté au coeur de la matière à refroidir.The device according to the invention is fixed tangentially to the previously perforated wall of the enclosure. In the case where the enclosure is a mixer, it is advantageous to arrange the devices approximately 45° from the mixing arms in a sector between an angle of 0° (i.e. vertical) to 50° relative to an angle of 90° (i.e. horizontal to the mixing arms) so that the cryogenic fluid is injected into the heart of the material to be cooled.

Par ailleurs, contrairement aux dispositifs de l'art antérieur, une partie du fluide cryogénique est déjà transformé en solide avant d'entrer en contact avec la masse à refroidir. En effet, le solide cryogénique se forme dès que le fluide frappe le siège de la soupape dans l'espace compris entre le siège et l'appui. Compte tenu du fait que c'est le solide cryogénique qui entre en contact avec la matière à refroidir le rendement de refroidissement est donc supérieur à celui obtenu avec les dispositifs de l'art antérieur.Furthermore, unlike prior art devices, part of the cryogenic fluid is already transformed into a solid before coming into contact with the mass to be cooled. In fact, the cryogenic solid is formed as soon as the fluid hits the valve seat in the space between the seat and the support. Taking into account the fact that it is the cryogenic solid which comes into contact with the material to be cooled, the cooling efficiency is therefore greater than that obtained with the devices of the prior art.

Le produit peut bien entendu être en mouvement dans l'enceinte, ce qui favorise les échanges thermiques et donc le refroidissement du contenu.The product can of course be moving in the enclosure, which promotes heat exchange and therefore cooling of the contents.

Selon un mode de réalisation avantageux, le dispositif conforme à l'invention est fixé sur la partie inférieure de la cuve de malaxage.According to an advantageous embodiment, the device according to the invention is fixed to the lower part of the mixing tank.

L'invention va maintenant être exposée de façon plus détaillée à l'aide d'un exemple pratique, illustré avec les dessins, sur lesquels :

  • la Figure 1 est une vue en coupe d'une installation comprenant une enceinte et des dispositifs conformes à l'invention,
  • la Figure 2 est une vue, en élévation, d'un dispositif conforme à l'invention,
  • la Figure 3 est une vue, en coupe, selon le plan III-III de la figure 2, et
  • et la Figure 4 est une vue, en coupe, selon le plan IV-IV de la figure 2.
The invention will now be explained in more detail using a practical example, illustrated with the drawings, in which:
  • there Figure 1 is a sectional view of an installation comprising an enclosure and devices conforming to the invention,
  • there Figure 2 is an elevation view of a device according to the invention,
  • there Figure 3 is a view, in section, according to plan III-III of the figure 2 , And
  • and the Figure 4 is a view, in section, according to plan IV-IV of the figure 2 .

La figure 1 montre la partie inférieure d'une enceinte 1 sur la paroi de laquelle sont fixés, de préférence par soudure, deux dispositifs 3 d'injection de fluide cryogénique conformes à l'invention. Les dispositifs 3 sont reliés par un tuyau flexible 4 et un tuyau calorifugé 5 à une électrovanne 6 permettant l'ouverture et la fermeture de l'alimentation en fluide cryogénique.There figure 1 shows the lower part of an enclosure 1 on the wall of which are fixed, preferably by welding, two cryogenic fluid injection devices 3 conforming to the invention. The devices 3 are connected by a flexible pipe 4 and a heat-insulated pipe 5 to a solenoid valve 6 allowing the opening and closing of the supply of cryogenic fluid.

La figure 2 montre plus en détail un dispositif 3 d'injection, comprenant une partie supérieure 7 dont l'extrémité libre 8 est destinée à être fixée sur la paroi externe d'une enceinte, et une partie basse 9, les deux parties étant reliées par un raccord rapide 10. A la partie basse 9 dudit dispositif 3 est relié un tuyau flexible 4. Un câble anticorps de fouet 11 reliant le tuyau flexible 4, la partie basse 9 et la partie supérieure 7. Ce câble est fixé à l'aide de crochets de sécurité 12 de telle sorte que seuls des personnes habilitées puissent le défaire par exemple en vue d'un démontage.There figure 2 shows in more detail an injection device 3, comprising an upper part 7 whose free end 8 is intended to be fixed on the external wall of an enclosure, and a lower part 9, the two parts being connected by a connector rapid 10. A flexible pipe 4 is connected to the lower part 9 of said device 3. A whipping cable 11 connecting the flexible pipe 4, the lower part 9 and the upper part 7. This cable is fixed using hooks safety 12 so that only authorized people can undo it, for example for dismantling.

A l'intérieur du dispositif 3 est logée la soupape dont seule la face supérieure 13 est visible.Inside the device 3 is housed the valve of which only the upper face 13 is visible.

Comme cela est plus visible sur les figures 3 et 4, le dispositif d'injection 3 comprend un corps composé de deux parties rendues solidaires, la partie inférieure 9 et la partie supérieure 7. La partie supérieure est elle même constituée de 3 éléments, une paroi sensiblement cylindrique 14 externe en acier inoxydable dont une extrémité vient indirectement en appui sur la partie inférieure 9 et dont l'autre extrémité est destinée à être fixée sur la paroi de l'enceinte.As is most visible on the figures 3 and 4 , the injection device 3 comprises a body composed of two parts made integral, the lower part 9 and the upper part 7. The upper part is itself made up of 3 elements, a substantially cylindrical external wall 14 made of stainless steel, one end of which comes indirectly to rest on the lower part 9 and the other end of which is intended to be fixed on the wall of the enclosure.

A l'intérieur de cette paroi 14, est disposée une pièce de forme complémentaire, appelée pont thermique, également creuse, isolante, à l'intérieur de laquelle est disposée un troisième élément 16 en acier inoxydable traversé en son centre par la soupape 17 et par deux canaux 18 traversants débouchant sur la partie supérieure biseautée de la pièce 16 destinée à recevoir le siège 13 de la soupape 17.Inside this wall 14 is placed a piece of complementary shape, called a thermal bridge, also hollow, insulating, inside which is placed a third element 16 in stainless steel crossed in its center by the valve 17 and by two through channels 18 opening onto the beveled upper part of the part 16 intended to receive the seat 13 of the valve 17.

L'ouverture traversante centrale de la pièce 16 comprend trois zones, une zone centrale 19a de diamètre sensiblement égale à celui de la soupape de telle sorte que la soupape peut être placée en coulissement dans cette zone et une zone inférieure 19b de diamètre supérieur, de telle sorte qu'elle puisse recevoir autour de l'axe de la soupape le ressort 19 forçant celle-ci. Ce ressort 19 étant maintenu par l'épaulement 20 formé entre les zones 19a et 19b.The central through opening of the part 16 comprises three zones, a central zone 19a of diameter substantially equal to that of the valve so that the valve can be placed sliding in this zone and a lower zone 19b of greater diameter, of such that it can receive around the axis of the valve the spring 19 forcing it. This spring 19 being held by the shoulder 20 formed between zones 19a and 19b.

A l'extrémité opposée supérieure, la zone 19c est de forme biseautée, de diamètre plus large en son extrémité libre, la forme du biseau étant adaptée pour recevoir de manière étanche le siège de la soupape lorsque la soupape est forcée par le ressort.At the upper opposite end, the zone 19c is of beveled shape, of wider diameter at its free end, the shape of the bevel being adapted to sealingly receive the valve seat when the valve is forced by the spring.

La partie inférieure 9 est quant à elle constituée d'un seul élément en acier inoxydable, de forme générale cylindrique. Cette pièce comporte un évidement aveugle central 21 qui lorsque le dispositif est monté coïncide avec l'ouverture 19b de la partie supérieure. Cet évidement est destiné à recevoir l'extrémité de la soupape maintenue par le ressort 19 et l'écrou de tarage 22 du ressort.The lower part 9 is made up of a single stainless steel element, of generally cylindrical shape. This part has a central blind recess 21 which when the device is mounted coincides with the opening 19b of the upper part. This recess is intended to receive the end of the valve held by the spring 19 and the calibration nut 22 of the spring.

Elle comporte également de part et d'autre de l'évidement aveugle deux canaux verticaux 23, 24 qui en position de montage débouchent à une extrémité chacun sur un canal traversant 18 et l'autre extrémité dans un canal perpendiculaire 25 dont l'une des extrémités débouche sur le canal 23 et l'autre est destinée à être reliée au système d'alimentation en fluide cryogénique par l'intermédiaire du raccord 26.It also comprises on either side of the blind recess two vertical channels 23, 24 which in the mounting position open at one end each into a through channel 18 and the other end into a perpendicular channel 25, one of which one end opens onto channel 23 and the other is intended to be connected to the cryogenic fluid supply system via connection 26.

La partie inférieure 9 est fixée à la pièce centrale 16 par des vis 27 et 28.The lower part 9 is fixed to the central part 16 by screws 27 and 28.

La vis 28 est une vis anti-démontage permettant le respect des normes de sécurité des dispositifs sous pression.Screw 28 is an anti-disassembly screw allowing compliance with safety standards for pressure devices.

Les parties 14 et 15 sont rendues solidaires de la partie 9 par le raccord 10 (représenté sur la figure 2).Parts 14 and 15 are made integral with part 9 by connection 10 (shown on the figure 2 ).

Le raccord 10 est un raccord à démontage rapide. Il pourrait être aussi du type vissé ou à baïonnette ou analogue.Connection 10 is a quick release connection. It could also be of the screwed or bayonet type or the like.

En fonctionnement, la vanne 6 est ouverte, et le fluide cryogénique est envoyé par les tuyaux 5 puis le flexible 4 dans l'intérieur du dispositif 3, à travers le canal 25 puis chacun des canaux 18. Le fluide sous pression exerce alors une pression sur le siège de la soupape, un espace est alors formé entre la partie 19c et le siège de la soupape. Le solide cryogénique commence à se former dans cet espace par le choc entre le fluide et le siège de la soupape, et est forcé à l'intérieur de l'enceinte. Lorsqu'il est nécessaire d'arrêter l'alimentation en fluide cryogénique, la vanne 6 est fermée.In operation, the valve 6 is open, and the cryogenic fluid is sent through the pipes 5 then the flexible 4 into the interior of the device 3, through the channel 25 then each of the channels 18. The pressurized fluid then exerts a pressure on the valve seat, a space is then formed between part 19c and the valve seat. The cryogenic solid begins to form in this space by the impact between the fluid and the valve seat, and is forced inside the enclosure. When it is necessary to stop the supply of cryogenic fluid, valve 6 is closed.

On observera que les opérations de démontage-remontage de l'ensemble d'injection 3 sont très faciles. Si on démonte le raccord 10, les différentes pièces constitutives se désolidarisent, ce qui permet de les inspecter, et les nettoyer.It will be observed that the disassembly-reassembly operations of the injection assembly 3 are very easy. If we dismantle the connection 10, the different constituent parts separate, which allows them to be inspected and cleaned.

L'invention porte également sur l'utilisation d'un dispositif d'injection tel que décrit précédemment pour le refroidissement de produit en vrac.The invention also relates to the use of an injection device as described above for the cooling of bulk product.

Elle porte également sur un procédé de refroidissement de matériau en vrac contenu dans une enceinte, selon lequel un fluide cryogénique est injecté au coeur du matériau à refroidir à l'aide d'au moins un dispositif d'injection, de préférence m dispositifs d'injection répartis symétriquement dans la partie basse de l'enceinte, m étant un entier compris entre 2 et 20, de préférence un nombre pair.It also relates to a process for cooling bulk material contained in an enclosure, according to which a cryogenic fluid is injected into the heart of the material to be cooled using at least one injection device, preferably m injection distributed symmetrically in the lower part of the enclosure, m being an integer between 2 and 20, preferably an even number.

De façon avantageuse, l'enceinte est un malaxeur.Advantageously, the enclosure is a mixer.

Le procédé est particulièrement bien adapté pour refroidir tout type de matériau quel que soit son état physique, notamment pour des produits, liquides, pâteux, solides ou pulvérulents.The process is particularly well suited to cooling any type of material whatever its physical state, particularly for liquid, pasty, solid or powdery products.

Claims (9)

  1. Injection device (3) fixed to the wall (2) of the lower part of a container (1) intended to contain a loose product to be cooled, said injection device (3) comprising a hollow cylindrical body in which a valve (17) forced by a spring (19) is inserted, said injection device comprising a through channel (18) substantially parallel to said valve intended to be fed with pressurized cryogenic fluid, one end of said through channel being connected to the cryogenic fluid supply system and the opposite end opening out at the seat (13) of the valve, characterized in that the spring is calibrated such that the valve cannot slide without being subjected to a cryogenic fluid pressure at least equal to a threshold pressure and thus allow the fact that, as soon as the cryogenic fluid pressure is less than a determined threshold, the pressure required to make the valve (17) slide is no longer reached and the seat (13) of the valve is repositioned in a leaktight manner against said wall (2).
  2. Injection device according to Claim 1, comprising n through channels (18), where n is between 2 and 5, said channels being symmetrically arranged relative to the longitudinal axis of the valve (17).
  3. Injection device according to Claim 1 or 2, comprising a thermal bridge (15), that is to say a part made of insulating material, between the element of the injection device connected directly to the cryogenic fluid inlet and the element of the injection device placed directly on the chamber wall.
  4. Injection device according to any one of Claims 1 to 3, comprising:
    - a lower element (9) which, in the operating position, is furthest away from the chamber wall, and which is connected to the cryogenic fluid supply system,
    - a central element (16), the lower end of which bears against the lower element,
    - said valve (17) being placed such that it slides in a through hole made axially in the central element (16), the seat (13) of the valve bearing in a leaktight manner against the bevelled upper part (19c) of said through hole,
    - a thermal bridge (15) which surrounds the central element and the lower end of which bears against the lower element,
    - a wall element (14), the lower end of which bears against the lower edge of the thermal bridge, and the upper end of which is intended to be fixed to the chamber wall,
    said lower element comprising:
    -- at least one supply channel (25), one end of which is connected to the supply system and the other end of which is connected to one end of a through channel (23) present in the central part (16), said through channel being substantially parallel to the axis of the valve, the other end thereof opening out at the seat of the valve,
    -- a blind central recess (21) intended to receive the free end of the axis of the valve surrounded by the calibration spring (19),
    said through hole made axially in the central element (16) comprising three zones:
    - a central zone (19a) with a diameter substantially equal to that of the valve, such that the valve can be placed slidingly in this zone,
    - said bevelled upper part (19c),
    - and a lower zone (19b) with a diameter greater than that of the central zone, such that it can receive, around the axis of the valve, the spring (19) that forces it,
    - a shoulder (20) being formed between the two zones (19a, 19b), the central zone and the lower zone, and the calibration spring (19) being held against said shoulder (20) in the mounted position.
  5. Injection device according to any one of Claims 1 to 4, which is connected to the cryogenic fluid supply via a fluid hose.
  6. Use of an injection device according to any one of Claims 1 to 5 for cooling a loose product in solid, pasty, liquid or powder form.
  7. Method for cooling loose material contained in a chamber, in which a cryogenic fluid is injected into the core of the material to be cooled by means of at least one injection device as described in any one of Claims 1 to 5, preferably m injection devices symmetrically distributed in the lower part of the chamber, where m is an integer between 2 and 20, preferably an even number.
  8. Method according to Claim 7, in which the chamber can be a mixing bowl.
  9. Method according to either one of Claims 7 and 8, in which the material to be cooled is in powder, liquid, pasty or solid form.
EP07803959.1A 2006-07-10 2007-06-28 Cryogenic fluid injection system for processing products in bulk and method of cooling implementing said system Active EP2041026B2 (en)

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PL07803959T PL2041026T3 (en) 2006-07-10 2007-06-28 Cryogenic fluid injection system for processing products in bulk and method of cooling implementing said system

Applications Claiming Priority (2)

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FR0652885A FR2903482B1 (en) 2006-07-10 2006-07-10 CRYOGENIC FLUID INJECTION SYSTEM FOR TREATING BULK PRODUCTS
PCT/FR2007/051549 WO2008007000A2 (en) 2006-07-10 2007-06-28 Cryogenic fluid injection system for processing products in bulk and method of cooling implementing said system

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EP2041026B1 EP2041026B1 (en) 2018-03-14
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EP (1) EP2041026B2 (en)
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DK (1) DK2041026T3 (en)
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FR (1) FR2903482B1 (en)
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FR2949647B1 (en) * 2009-09-10 2011-10-21 Air Liquide METHOD AND INSTALLATION FOR COOLING THE CONTENT OF AN ENCLOSURE USING A FORCED CONVECTION SYSTEM IN THE UPPER PART OF THE ENCLOSURE
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US20090314010A1 (en) 2009-12-24
EP2041026B1 (en) 2018-03-14
CN101489929A (en) 2009-07-22
AU2007274158A1 (en) 2008-01-17
PT2041026T (en) 2018-05-14
BRPI0714376B1 (en) 2018-06-19
US8621878B2 (en) 2014-01-07
FR2903482B1 (en) 2008-08-22
ES2665876T3 (en) 2018-04-30
EP2041026A2 (en) 2009-04-01
BRPI0714376A2 (en) 2013-04-02
DK2041026T3 (en) 2018-05-22
WO2008007000A2 (en) 2008-01-17
FR2903482A1 (en) 2008-01-11
CN101489929B (en) 2012-01-18
PL2041026T3 (en) 2018-08-31
AU2007274158B2 (en) 2012-07-26
ZA200900079B (en) 2009-12-30
WO2008007000A3 (en) 2008-03-13

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