FR2763673A1 - Bulk freezing of small items of frozen food - Google Patents
Bulk freezing of small items of frozen food Download PDFInfo
- Publication number
- FR2763673A1 FR2763673A1 FR9706118A FR9706118A FR2763673A1 FR 2763673 A1 FR2763673 A1 FR 2763673A1 FR 9706118 A FR9706118 A FR 9706118A FR 9706118 A FR9706118 A FR 9706118A FR 2763673 A1 FR2763673 A1 FR 2763673A1
- Authority
- FR
- France
- Prior art keywords
- drum
- carbon dioxide
- liquid carbon
- blades
- jet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/37—Freezing; Subsequent thawing; Cooling with addition of or treatment with chemicals
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/363—Freezing; Subsequent thawing; Cooling the materials not being transported through or in the apparatus with or without shaping, e.g. in form of powder, granules, or flakes
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/37—Freezing; Subsequent thawing; Cooling with addition of or treatment with chemicals
- A23L3/375—Freezing; Subsequent thawing; Cooling with addition of or treatment with chemicals with direct contact between the food and the chemical, e.g. liquid nitrogen, at cryogenic temperature
-
- 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
- F25D3/102—Stationary cabinets
-
- 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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/001—Arrangement or mounting of control or safety devices for cryogenic fluid systems
-
- 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
- F25D3/122—Stationary cabinets
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Nutrition Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
La présente invention est relative à un procédé de réfrigération de produits en vrac dans un tambour rotatif, au moyen d'un fluide cryogénique. Elle s'applique notamment au sous-refroidissement de petits produits déjà surgelés tels que des tortellinis, des grains de riz, des carottes en rondelles, des cubes de viande, etc, dits "produits IQF" (Individual Quick Fro- zen), afin d'y fixer et de surgeler une sauce qui est ultérieurement injectée autour de chaque produit individuellement. L'invention s'applique également à la surgélation de petits produits en vrac. The present invention relates to a process for refrigerating bulk products in a rotary drum, using a cryogenic fluid. It applies in particular to the sub-cooling of small already frozen products such as tortellini, rice grains, carrots in slices, cubes of meat, etc., called "IQF products" (Individual Quick Frozen), in order fix and freeze a sauce which is subsequently injected around each product individually. The invention also applies to the freezing of small bulk products.
Dans la technique actuelle, on utilise comme fluide cryogénique, dans ce type d'application, de l'azote liquide. L'injection s'effectue axialement à travers la porte du tambour, au moyen d'une canne d'injection dont la buse d'extrémité comporte un orifice calibré. In the current technique, cryogenic fluid is used in this type of application, liquid nitrogen. The injection is carried out axially through the door of the drum, by means of an injection rod whose end nozzle has a calibrated orifice.
Cette technique présente un sérieux inconvénient sur le plan économique. En effet, le jet d'azote liquide se vaporise rapidement à la température intérieure du tambour, de sorte qu'une partie importante du froid est évacuée par le conduit d'extraction des gaz froids et est perdue pour la réfrigération visée. This technique has a serious economic disadvantage. Indeed, the jet of liquid nitrogen vaporizes quickly at the internal temperature of the drum, so that a large part of the cold is evacuated by the cold gas extraction duct and is lost for the intended refrigeration.
L'invention a pour but de permettre une réfrigération plus efficace et plus rationnelle des produits. The object of the invention is to allow more efficient and rational refrigeration of the products.
A cet effet, l'invention a pour objet un procédé de réfrigération du type précité, caractérisé en ce qu'on injecte dans le tambour, à peu près parallèlement à l'axe de celui-ci et au-dessus du niveau de remplissage du tambour, un jet d'anhydride carbonique
(CO2) liquide. To this end, the invention relates to a refrigeration process of the aforementioned type, characterized in that one injects into the drum, roughly parallel to the axis thereof and above the filling level of the drum, a jet of carbon dioxide
(CO2) liquid.
Ce procédé peut comporter une ou plusieurs des caractéristiques suivantes
- dans le cas d'un tambour muni de pales d'agitation des produits, on injecte l'anhydride carbonique liquide à l'intérieur du cylindre virtuel défini par les extrémités radialement intérieures des pales;
- on injecte l'anhydride carbonique liquide suivant l'axe du tambour;
- on règle les paramètres du jet de façon que la neige carbonique formée atteigne un emplacement voisin du fond du tambour opposé à l'emplacement d'injection, sans heurter ce fond.This process may include one or more of the following characteristics
- In the case of a drum fitted with product stirring blades, liquid carbon dioxide is injected inside the virtual cylinder defined by the radially inner ends of the blades;
- Liquid carbon dioxide is injected along the axis of the drum;
- The jet parameters are adjusted so that the carbon dioxide snow formed reaches a location close to the bottom of the drum opposite the injection location, without hitting this bottom.
L'invention a également pour objet un dispositif d'injection d'anhydride carbonique liquide destiné à la mise en oeuvre d'un tel procédé. Ce dispositif est caractérisé en ce qu'il comprend une canne thermiquement isolante adaptée pour traverser la porte du tambour et munie à son extrémité d'une buse d'injection d'anhydride carbonique liquide. The invention also relates to a device for injecting liquid carbon dioxide intended for the implementation of such a process. This device is characterized in that it comprises a thermally insulating rod adapted to pass through the door of the drum and provided at its end with a nozzle for injecting liquid carbon dioxide.
La buse d'injection peut en particulier comporter un orifice calibré qui se prolonge en un canal d'éjection cylindrique de même diamètre et dont la longueur est plusieurs fois supérieure à ce diamètre. The injection nozzle may in particular comprise a calibrated orifice which extends into a cylindrical ejection channel of the same diameter and the length of which is several times greater than this diameter.
Un exemple de mise en oeuvre de l'invention va maintenant être décrit en regard des dessins annexés, sur lesquels
- la Figure 1 représente schématiquement, en vue de côté, un tambour rotatif équipé d'un dispositif d'injection d'anhydride carbonique liquide conforme à l'invention;
- la Figure 2 est une vue schématique prise suivant la flèche II de la Figure 1;
- la Figure 3 représente à plus grande échelle, en vue de côté et avec arrachement, la porte du tambour équipée de ses accessoires; et
- la Figure 4 représente à encore plus grande échelle la buse d'injection de CC2 liquide.An example of implementation of the invention will now be described with reference to the accompanying drawings, in which
- Figure 1 shows schematically, in side view, a rotary drum equipped with a liquid carbon dioxide injection device according to the invention;
- Figure 2 is a schematic view taken along arrow II of Figure 1;
- Figure 3 shows on a larger scale, in side view and with parts broken away, the drum door fitted with its accessories; and
- Figure 4 shows on an even larger scale the liquid CC2 injection nozzle.
On a représenté schématiquement sur les Figures 1 et 2 un tambour rotatif 1, d'axe X-X sensiblement horizontal, qui sert au sous-refroidissement d'une charge 2 de petits produits en vrac tels que ceux indiqués plus haut. Le tambour 1 est supporté par deux berceaux 3 et est entraîné en rotation autour de son axe par des moyens appropriés, par exemple deux chaînes ou deux couronnes dentées 4 et des organes moteurs 5. There is shown schematically in Figures 1 and 2 a rotary drum 1, of axis X-X substantially horizontal, which is used for sub-cooling a load 2 of small bulk products such as those indicated above. The drum 1 is supported by two cradles 3 and is driven in rotation about its axis by suitable means, for example two chains or two toothed rings 4 and motor members 5.
Le tambour 1, qui est connu en soi à l'exception des moyens d'injection de CO2 liquide décrits plus loin, comprend une enveloppe 6, des pales d'agitation 7 et une porte 8. The drum 1, which is known per se with the exception of the means for injecting liquid CO2 described below, comprises a casing 6, stirring blades 7 and a door 8.
L'enveloppe 6 est constituée d'une virole cylindrique 9 munie d'un côté d'un fond bombé 10 soudé à la virole et, de l'autre côté, d'une partie 11 de chargement/déchargement de forme tronconique, soudée à la virole par sa grande base. La virole est équipée intérieurement d'une série de pales 7 voisine de la partie 11, et d'une autre série de pales 7 voisine du fond 10. The casing 6 consists of a cylindrical shell 9 provided on one side with a curved bottom 10 welded to the shell and, on the other side, of a portion 11 for loading / unloading of frustoconical shape, welded to the ferrule by its large base. The ferrule is internally equipped with a series of blades 7 close to the part 11, and another series of blades 7 close to the bottom 10.
La porte 8 comprend une partie rotative 12 solidaire de la petite base de la partie 11 de l'enveloppe, et une partie 13 non rotative portée par un châssis non représenté et articulée sur la partie 12 au moyen d'une charnière non visible sur les dessins. The door 8 comprises a rotary part 12 integral with the small base of the part 11 of the envelope, and a non-rotary part 13 carried by a chassis not shown and articulated on the part 12 by means of a hinge not visible on the drawings.
Comme on le voit mieux sur la Figure 3, la partie non rotative 13 de la porte présente un orifice central d'où part vers l'extérieur une conduite coudée 14 d'extraction de gaz froids, qui, en service, débouche vers le haut en regard d'une hotte d'aspiration 15. As best seen in Figure 3, the non-rotating part 13 of the door has a central orifice from which outwards an angled pipe 14 for extracting cold gases, which, in service, opens upwards next to an extractor hood 15.
De plus, une canne d'injection 16 traverse à joint étanche le coude 14, suivant l'axe X-X, est solidaire de ce coude et débouche légèrement au-delà de la face intérieure de la porte.In addition, an injection pipe 16 crosses with elbow the elbow 14, along the axis X-X, is integral with this elbow and opens slightly beyond the inner face of the door.
La canne 16 comprend un tube 17 à double paroi, isolé sous vide, qui est équipé à son extrémité libre d'un embout 18 taraudé. Dans cet embout se visse l'extrémité amont d'une buse d'injection 19 de forme générale tubulaire, sur laquelle est fixé un écrou de butée 20 qui limite le vissage. Intérieurement, la buse 19 est traversée par un conduit axial dont la partie amont 21 est convergente puis se prolonge en un conduit 22 de diamètre constant et de longueur plusieurs fois supérieure à ce diamètre. Ce conduit forme un orifice calibré qui se prolonge en un canal d'éjection. The rod 16 comprises a tube 17 with double wall, vacuum insulated, which is equipped at its free end with a tapped end 18. In this nozzle is screwed the upstream end of an injection nozzle 19 of generally tubular shape, on which is fixed a stop nut 20 which limits the screwing. Internally, the nozzle 19 is traversed by an axial duct, the upstream part 21 of which converges and then extends into a duct 22 of constant diameter and of length several times greater than this diameter. This conduit forms a calibrated orifice which extends into an ejection channel.
L'extrémité amont du tube 17 est reliée à un réservoir 23 de CC2 liquide sous 20 bars absolus et à -20 C, via une ligne 24 équipée d'une électrovanne 25 de régulation et d'accessoires classiques non représentés. The upstream end of the tube 17 is connected to a reservoir 23 of liquid CC2 at 20 bar absolute and at -20 C, via a line 24 fitted with a solenoid valve 25 for regulation and conventional accessories not shown.
En fonctionnement, une charge 2 de produits en vrac surgelés est introduite dans le tambour 1. Le tambour est entraîné en rotation autour de son axe X-X (flèche F de la Figure 2), et la vanne 24 est ouverte. In operation, a load 2 of frozen bulk products is introduced into the drum 1. The drum is rotated about its axis X-X (arrow F in Figure 2), and the valve 24 is open.
Un jet de CO2 liquide, régulé par la vanne 24, est alors injecté dans le tambour, suivant l'axe X-X, à travers la buse 19. Le diamètre et la longueur du canal 22 sont choisis de façon que, comme illustré sur la Figure 1, le nuage 26 de neige carbonique résultant atteigne une région voisine du fond 10, sans toutefois heurter celui-ci. La longueur relativement importante du canal 22 permet par ailleurs de guider correctement le jet pour que la neige carbonique se forme à l'intérieur du cylindre virtuel 27 défini par l'extrémité libre des pales 7.A jet of liquid CO2, regulated by the valve 24, is then injected into the drum, along the axis XX, through the nozzle 19. The diameter and the length of the channel 22 are chosen so that, as illustrated in FIG. 1, the cloud 26 of carbon dioxide snow resulting reaches a region close to the bottom 10, without however striking the latter. The relatively large length of the channel 22 also makes it possible to correctly guide the jet so that the carbon dioxide snow forms inside the virtual cylinder 27 defined by the free end of the blades 7.
De cette manière, la neige carbonique se dépose par gravité sur les produits 2, et pénètre à l'intérieur de la charge du fait de l'agitation réalisée par la rotation du tambour. In this way, the carbon dioxide snow is deposited by gravity on the products 2, and penetrates inside the load due to the agitation carried out by the rotation of the drum.
Ainsi, une partie importante du froid produit par la détente du C02 liquide est utilisée effectivement pour le refroidissement visé, ce qui rend le procédé particulièrement efficace. Thus, a significant part of the cold produced by the expansion of the liquid CO 2 is effectively used for the targeted cooling, which makes the process particularly effective.
Par ailleurs, la canne d'injection 16 peut avoir les mêmes dimensions qu'une canne classique d'injection d'azote liquide, ce qui lui permet de se substituer à une telle canne classique dans une installation existante. De plus, l'installation peut être réalisée de manière beaucoup plus économique, puisque le
C02 liquide se trouve à -20 C seulement. Furthermore, the injection cane 16 can have the same dimensions as a conventional liquid nitrogen injection cane, which allows it to replace such a conventional cane in an existing installation. In addition, the installation can be carried out much more economically, since the
Liquid C02 is found at -20 C only.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9706118A FR2763673B1 (en) | 1997-05-20 | 1997-05-20 | METHOD AND DEVICE FOR REFRIGERATION OF BULK PRODUCTS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9706118A FR2763673B1 (en) | 1997-05-20 | 1997-05-20 | METHOD AND DEVICE FOR REFRIGERATION OF BULK PRODUCTS |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2763673A1 true FR2763673A1 (en) | 1998-11-27 |
FR2763673B1 FR2763673B1 (en) | 1999-06-18 |
Family
ID=9507024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9706118A Expired - Fee Related FR2763673B1 (en) | 1997-05-20 | 1997-05-20 | METHOD AND DEVICE FOR REFRIGERATION OF BULK PRODUCTS |
Country Status (1)
Country | Link |
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FR (1) | FR2763673B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0923883A2 (en) * | 1997-10-30 | 1999-06-23 | The BOC Group plc | Tumble coating |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4022600A (en) * | 1975-05-21 | 1977-05-10 | Fumio Mutoh | Apparatus for freezing cooked rice |
US4187325A (en) * | 1977-09-07 | 1980-02-05 | Lewis Tyree Jr | Steam cooking with direct contact CO2 cooling |
JPS58101641A (en) * | 1981-12-11 | 1983-06-16 | Nippon Sanso Kk | Preparation of minced food frozen in loosened state |
US4478861A (en) * | 1982-04-19 | 1984-10-23 | Chef Automatique International Ltd. | Preparation of a frozen food product for later use |
US5230221A (en) * | 1990-06-04 | 1993-07-27 | David Delich | Chilling door for vacuum tumblers and massagers |
US5603567A (en) * | 1995-02-17 | 1997-02-18 | Blentech Corporation | Coaxial cryogenic injection system |
-
1997
- 1997-05-20 FR FR9706118A patent/FR2763673B1/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4022600A (en) * | 1975-05-21 | 1977-05-10 | Fumio Mutoh | Apparatus for freezing cooked rice |
US4187325A (en) * | 1977-09-07 | 1980-02-05 | Lewis Tyree Jr | Steam cooking with direct contact CO2 cooling |
JPS58101641A (en) * | 1981-12-11 | 1983-06-16 | Nippon Sanso Kk | Preparation of minced food frozen in loosened state |
US4478861A (en) * | 1982-04-19 | 1984-10-23 | Chef Automatique International Ltd. | Preparation of a frozen food product for later use |
US5230221A (en) * | 1990-06-04 | 1993-07-27 | David Delich | Chilling door for vacuum tumblers and massagers |
US5603567A (en) * | 1995-02-17 | 1997-02-18 | Blentech Corporation | Coaxial cryogenic injection system |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Section Ch Week 8330, Derwent World Patents Index; Class D13, AN 83-719684, XP002054045 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0923883A2 (en) * | 1997-10-30 | 1999-06-23 | The BOC Group plc | Tumble coating |
EP0923883A3 (en) * | 1997-10-30 | 2000-07-12 | The BOC Group plc | Tumble coating |
Also Published As
Publication number | Publication date |
---|---|
FR2763673B1 (en) | 1999-06-18 |
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