FR2523707A1 - Hot air dryer for lengths of pasta prod. e.g. macaroni - has oscillating damper in conveyor passage so that hotter air may be used - Google Patents

Hot air dryer for lengths of pasta prod. e.g. macaroni - has oscillating damper in conveyor passage so that hotter air may be used Download PDF

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Publication number
FR2523707A1
FR2523707A1 FR8204798A FR8204798A FR2523707A1 FR 2523707 A1 FR2523707 A1 FR 2523707A1 FR 8204798 A FR8204798 A FR 8204798A FR 8204798 A FR8204798 A FR 8204798A FR 2523707 A1 FR2523707 A1 FR 2523707A1
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France
Prior art keywords
pasta
lengths
passage
dryer
air
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.)
Withdrawn
Application number
FR8204798A
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French (fr)
Inventor
Rene Bardet-Neyrin
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BASSANO CO
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BASSANO CO
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Publication date
Application filed by BASSANO CO filed Critical BASSANO CO
Priority to FR8204798A priority Critical patent/FR2523707A1/en
Publication of FR2523707A1 publication Critical patent/FR2523707A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/122—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of material being carried by transversely moving rollers or rods which may rotate
    • F26B15/126—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of material being carried by transversely moving rollers or rods which may rotate the material being "pasta" products, e.g. spaghetti
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
    • F26B21/028—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow by air valves, movable baffles or nozzle arrangements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Noodles (AREA)

Abstract

The dryer is of the type in which the lengths are hung over horizontal rods which convey the lengths through a drying chamber. The chamber comprises a series of compartments each vertically partitioned into downflow and upflow air ducts. Downstream of the ends of the pasta lengths in the direction of airflow approaching the pasta, the conveyor passage is vertically extended for a short distance beyond the pasta. An oscillatory damper is fitted in the extension of the passage so that airflow through the extension can be cyclically opened and then at least partly closed. This is an industrial dryer for cut lengths of pasta prods. e.g. spaghetti. The oscillating damper ensures that all the prod.is consistently dried even when air is employed at a higher temp. than normal in order to increase throughput.

Description

La présente invention se réfère aux séchoirs pour pâtes alimentaires dans lesquels-celles-ci sont portées par des tiges ou cannes qu'on fait circuler à l'intérieur de l'appareil. The present invention relates to dryers for pasta in which they are carried by rods or canes which are circulated inside the device.

On sait que ces séchoirs comprennent en général des chaines ou autres dispositifs qui entrainent les cannes en succession de façon à les faire passer dans une ou plusieurs séries de cellules traversées par un courant d'air de séchage. Chaque cellule est ellememe divisée en deux moitiés par une cloison transversale, l'air provenant d'une batterie de chauffage appropriée, descendant dans une moitié et remontant dans l'autre de façon que finalement la masse de pâte soit traversée deux fois par lui. It is known that these dryers generally include chains or other devices which drive the canes in succession so as to pass them through one or more series of cells traversed by a stream of drying air. Each cell is itself divided into two halves by a transverse partition, the air coming from a suitable heating coil, descending in one half and rising in the other so that finally the mass of dough is crossed twice by it.

Bien entendu pour que l'air puisse passer d'une moitié de la cellule à l'autre il faut soit prévoir qu'il traverse longitudinalement la masse des pâtes afin de s'écouler à travers l'ouverture prévue dans la cloison médiane de la cellule pour le passage des pâtes, soit prolonger quelque peu cette ouverture en direction du bas de manière à créer pour cet air une sorte de passage inférieur particulier. Or l'expérience montre que de quelque façon qu'on procède, l'on n'obtient pas un séchage régulier, du moins quand on élève la température de l'air de séchage en vue d'accélérer le processus. Of course, so that the air can pass from one half of the cell to the other, it must either be provided that it passes longitudinally through the mass of the pasta in order to flow through the opening provided in the central partition of the cell for the passage of pasta, or extend this opening somewhat towards the bottom so as to create a special kind of underpass for this air. Now experience shows that in any way that one proceeds, one does not obtain a regular drying, at least when one raises the temperature of the drying air in order to accelerate the process.

L'invention vise à remédier à cet inconvénient. The invention aims to remedy this drawback.

Conformément A l'invention l'on prévoit pour l'air dans la cloison médiane un passage situé en aval des extrémités des pâtes dans le sens de circulation de l'air perpendiculairement au trajet de celles-ci et l'on dispose dans ce passage un volet articulé auquel on impartit un mouvement oscillant de façon A alternativement ouvrir ce passage de façon substantiellement complète et à le fermer au moins en grande partie, la période de ce mouvement étant relativement courte par rapport au temps de séjour des pâtes dans la cellule. In accordance with the invention, a passage is provided for the air in the central partition located downstream of the ends of the pasta in the direction of air circulation perpendicular to the path of the pastes and there is arranged in this passage an articulated flap to which an oscillating movement is imparted so as to alternately open this passage substantially completely and to close it at least in large part, the period of this movement being relatively short compared to the residence time of the pasta in the cell.

On comprend qu'ainsi le flux d'air de séchage circule en grande partie dans le passage en s'ecoulant parallèlement aux pâtes lorsque le volet est ouvert, puis au contraire est obligé de traverser les nappes successives que forment ces pates suspendues aux cannes quand ce volet est fermé.0n réalise ainsi un meilleur contact entre l'air et la surface des pâtes et l'on évite que celles qui se touchent sur une même canne n'arrivent à coller les unes aux autres. L'expérience montre qu'on peut ainsi accélérer le séchage dans une mesure considérable sans risque d'obtenir des produits irrégulièrement secs. It is understood that thus the drying air flow largely circulates in the passage, flowing parallel to the pasta when the shutter is open, then on the contrary is forced to cross the successive layers which form these doughs suspended from the canes when this shutter is closed. 0n thus achieves better contact between the air and the surface of the pasta and prevents those which touch on the same cane from sticking to each other. Experience has shown that drying can be accelerated to a considerable extent without the risk of obtaining irregularly dry products.

le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer
Fig. 1 est une coupe longitudinale partielle d'un séchoir à pâtes comportant application de l'invention.the appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing
Fig. 1 is a partial longitudinal section of a pasta dryer comprising application of the invention.

Fig. 2 en est une coupe transversale suivant II-II (fig. 1). Fig. 2 is a cross section along II-II (fig. 1).

Le séchoir représenté étant d'un type en soi connu, on se bornera à en rappeler ci-après les dispositions générales qui constituent le cadre dans lequel s'insère l'invention. Les pâtes 1 sont montées à cheval sur des cannes 2 dont les extrémités sont portées par des channes 3 qui les déplacent à travers une succession de cellules de séchage délimitées par des cloisons principales 4, chacune d'elles étant divisée en deux moitis par une cloison intermédiaire ou cloison diane 5, ces cloisons étant découpées d'ouvertures appropriées pour permettre le passage de l'ensemble des channes, des cannes et des pâtes.Dans chaque cellule, l'une des moitis est équipée de ventilateurs 6 qui soufflent l'air de séchage sur les pâtes, cet air passant ensuite dans l'autre moitié, en partie à travers les pâtes, en partie par un passage ménagé au-dessous d'elles, s'élevant dans cette seconde moitié et traversant une ouverture supérieure 7 de la cloison médiane 5 pour revenir aux ventilateurs. On a figuré en 8 des tuyauteries reliées A un ventilateur aspirant qui extrait du séchoir de l'air humide, lequel est remplacé par de l'air plus sec arrivant à partir de canalisations latérales telles que 9 (fig. 2). Des registres 10 et 11 permettent les réglages.Le chauffage de l'air est assuré dans chaque cellule par une batterie 12, tandis que des pulvérisateursl3 permettent d'élever le degré d'humidité de l'air de séchage quand cela est nécessaire. The dryer shown being of a type known per se, we will confine ourselves to recalling below the general provisions which constitute the framework in which the invention is inserted. The doughs 1 are mounted astride canes 2, the ends of which are carried by chains 3 which move them through a succession of drying cells delimited by main partitions 4, each of them being divided into two halves by a partition intermediate or diane partition 5, these partitions being cut out with suitable openings to allow the passage of all the channes, canes and pasta. In each cell, one of the halves is equipped with fans 6 which blow the air drying on the pasta, this air then passing into the other half, partly through the pasta, partly through a passage formed below them, rising in this second half and passing through an upper opening 7 of the middle partition 5 to return to the fans. There are 8 pipes connected to a suction fan which extracts humid air from the dryer, which is replaced by drier air arriving from lateral pipes such as 9 (fig. 2). Registers 10 and 11 allow the settings. The heating of the air is ensured in each cell by a battery 12, while sprayers 13 make it possible to raise the degree of humidity of the drying air when necessary.

On a représenté en 14 des volets de répartition d'air oscillants du genre décrit dans la demande de brevet déposée ce même jour au nom de la présente Demanderesse pour Dispositif de répartition d'air pour séchoirs à pâtes alimentaires et analogues". There are shown at 14 oscillating air distribution flaps of the kind described in the patent application filed the same day in the name of the present Applicant for Air distribution device for pasta driers and the like ".

Conformément à l'invention, dans le passage 15 réalisé dans chaque cloison médiane 5 par le prolongement en direction du bas de l'ouverture de passage des pâtes, et par conséquent au-dessous du plan horizontal des extrémités inférieures de celles-ci, on a disposé un volet transversal 16 calé sur un axe 17 auquel on impartit un mouvement oscillant de façon qu'il ferme et ouvre alternativement le passage 15. According to the invention, in the passage 15 made in each central partition 5 by the extension towards the bottom of the opening for passage of the pasta, and therefore below the horizontal plane of the lower ends thereof, it is has disposed a transverse flap 16 fixed on an axis 17 to which an oscillating movement is imparted so that it alternately closes and opens the passage 15.

On comprend que lorsque ce passage est fermé, l'air dé séchage doit traverser suivant une direction approximativement horizontale les nappes successives que déterminent les rangées de pâtes 1 suspendues aux cannes 2 (trajet indiqué par les flèches 18). Au contraire, quand ledit passage 15 est ouvert, cet air a tendance à s'écouler en majeure partie à travers lui en circulant verticalement entre les rangées de pâtes, comme schématisé par les flèches 19. Dans le premier cas les parties supérieures des pâtes suspendues sont légèrement favorisées au point de vue du sechage, mais la différence est faible et dans la pratique elle s'avère insensible en fin de séchage.Par contre l'air qui circule ainsi suivant les flèches 18 lèche les zones en vis-à-vis des pâtes suspendues à une même canne et évite totalement qu'elles n'adhèrent localement les unes aux autres, comme cela arrive parfois dans la technique antérieure. En fait l'expérience montre que le dispositif de volet oscillant suivant l'invention permet d'opérer le séchage à plus haute température, donc plus rapidement. It is understood that when this passage is closed, the drying air must cross in an approximately horizontal direction the successive layers which determine the rows of pasta 1 suspended from the rods 2 (path indicated by the arrows 18). On the contrary, when said passage 15 is open, this air tends to flow mainly through it by circulating vertically between the rows of pasta, as shown schematically by the arrows 19. In the first case the upper parts of the suspended pasta are slightly favored from the point of view of drying, but the difference is small and in practice it turns out to be insensitive at the end of drying. On the other hand the air which circulates thus according to the arrows 18 licks the opposite areas doughs suspended from the same cane and completely prevents them from sticking together locally, as sometimes happens in the prior art. In fact, experience shows that the swinging shutter device according to the invention makes it possible to operate the drying at a higher temperature, therefore faster.

La période d'oscillation du volet 16 est préférablement choisie relativement courte par rapport au temps de séjour des pâtes dans chaque moitié de cellule de manière que toutes soient pratiquement traitées de mEme manière. The oscillation period of the flap 16 is preferably chosen to be relatively short compared to the residence time of the pasta in each cell half so that all of them are practically treated in the same way.

Le volet 16 peut, si désiré, être prévu de façon A n'obturer le passage 15 que de façon partielle. The flap 16 can, if desired, be provided so as to close the passage 15 only partially.

I1 doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'A titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents. On conçoit que bien qu'on ait décrit l'invention en référence à un séchoir usuel dans lequel l'air est soufflé par le haut, elle s'appliquerait également si le soufflage s'opérait par le bas.  It should moreover be understood that the foregoing description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents. It is understood that although the invention has been described with reference to a conventional dryer in which the air is blown from above, it would also apply if the blowing took place from below.

Claims (2)

REVENDICATIONS 1. Séchoir pour pâtes alimentaires et analogues, du genre dans lequel les pâtes, montées sur des cannes, traversent au moins une cellule divisée en deux moitiés par une cloison médiane comportant en aval des extrémités des pâtes dans le sens de circulation de l'air une ouverture propre à être traversée par les cannes et les pâtes qu'elles portent, cette ouverture se prolongeant quelque peu au-delà des extrémités des pâtes par un passage qui s'étend sur toute la largeur utile du séchoir, caractérisé en ce que dans ce passage (15) est disposé un volet oscillant (16) qui l'ouvre, puis le ferme au moins en partie. 1. Dryer for pasta and the like, of the type in which the pasta, mounted on canes, passes through at least one cell divided into two halves by a central partition having downstream ends of the pasta in the direction of air circulation an opening suitable for the canes and the pasta they carry to pass through, this opening extending somewhat beyond the ends of the pasta by a passage which extends over the entire useful width of the dryer, characterized in that in this passage (15) is arranged an oscillating flap (16) which opens it, then closes it at least in part. 2. Séchoir suivant la revendication 1, caractérisé en ce que la période d'oscillation du volet est courte relativement au temps de séjour des pâtes dans la cellule considérée.  2. A dryer according to claim 1, characterized in that the period of oscillation of the flap is short relative to the residence time of the pasta in the cell under consideration.
FR8204798A 1982-03-18 1982-03-18 Hot air dryer for lengths of pasta prod. e.g. macaroni - has oscillating damper in conveyor passage so that hotter air may be used Withdrawn FR2523707A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8204798A FR2523707A1 (en) 1982-03-18 1982-03-18 Hot air dryer for lengths of pasta prod. e.g. macaroni - has oscillating damper in conveyor passage so that hotter air may be used

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FR8204798A FR2523707A1 (en) 1982-03-18 1982-03-18 Hot air dryer for lengths of pasta prod. e.g. macaroni - has oscillating damper in conveyor passage so that hotter air may be used

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993003620A1 (en) * 1991-08-21 1993-03-04 Bühler AG Maschinenfabrik Process and device for press-moulding and drying food pastes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR889291A (en) * 1941-12-24 1944-01-05 Machine for searing and continuous drying of long and short pasta
CH388194A (en) * 1961-11-29 1965-02-15 Buehler Ag Geb Long goods dryer
US3386186A (en) * 1965-02-02 1968-06-04 Robert Hildebrand Maschb G M B Apparatus for conducting a gaseous drying medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR889291A (en) * 1941-12-24 1944-01-05 Machine for searing and continuous drying of long and short pasta
CH388194A (en) * 1961-11-29 1965-02-15 Buehler Ag Geb Long goods dryer
US3386186A (en) * 1965-02-02 1968-06-04 Robert Hildebrand Maschb G M B Apparatus for conducting a gaseous drying medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993003620A1 (en) * 1991-08-21 1993-03-04 Bühler AG Maschinenfabrik Process and device for press-moulding and drying food pastes

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