FR2674944A1 - Installation for the drying of granules made of plastic material with a view to feeding them into a conversion machine - Google Patents

Installation for the drying of granules made of plastic material with a view to feeding them into a conversion machine Download PDF

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Publication number
FR2674944A1
FR2674944A1 FR9103965A FR9103965A FR2674944A1 FR 2674944 A1 FR2674944 A1 FR 2674944A1 FR 9103965 A FR9103965 A FR 9103965A FR 9103965 A FR9103965 A FR 9103965A FR 2674944 A1 FR2674944 A1 FR 2674944A1
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FR
France
Prior art keywords
receptacle
installation
drying
hopper
lamellar space
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Granted
Application number
FR9103965A
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French (fr)
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FR2674944B3 (en
Inventor
Perrin Robert
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Individual
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Individual
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Publication date
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Priority to FR9103965A priority Critical patent/FR2674944B3/en
Publication of FR2674944A1 publication Critical patent/FR2674944A1/en
Application granted granted Critical
Publication of FR2674944B3 publication Critical patent/FR2674944B3/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
    • F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/08—Parts thereof
    • F26B25/10—Floors, roofs, or bottoms; False bottoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F26B9/063—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers for drying granular material in bulk, e.g. grain bins or silos with false floor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Installation characterised in that it consists of a receptacle (1) which ends at its base in an orifice (3) for discharge of the dried products, this receptacle comprising internally, over at least a part of its height, a perforated wall (4) delimiting a lamellar space (5) with the wall of the receptacle, this receptacle being provided with a pipe (7) for feeding drying air which is oriented so as to open essentially tangentially to this lamellar space (5).

Description

"Installation pour le séchage de granulés en matière plastique en vue de leur alimentation dans une machine de transformation"."Installation for drying plastic granules for feeding into a processing machine".

On connaît déjà des installations de ce genre qui comprennent un réceptacle comportant une seconde paroi interne perforée servant au passage de l'air de séchage des granulés qui sont ensuite évacués vers la machine de transformation. L'air de séchage est amené dans cet espace lamellaire formé entre le réceptacle et la paroi interne perforée par une tubulure qui débouche radialement au travers de la paroi du réceptacle et il s'ensuit que les granulés situés derrière la paroi perforée en regard de cet orifice radial sont séchés très correctement et cela pratiquement jusqu'au centre du réceptacle alors que, par contre, les granulés qui sont situés à hauteur de la moitié de la cloison perforée opposée à celle comportant le conduit radial d'alimentation en air, ne sont pratiquement pas séchés. Installations of this type are already known which comprise a receptacle comprising a second perforated internal wall serving for the passage of the drying air of the granules which are then evacuated towards the processing machine. The drying air is brought into this lamellar space formed between the receptacle and the internal wall perforated by a tube which opens radially through the wall of the receptacle and it follows that the granules located behind the perforated wall opposite this radial orifice are dried very correctly and this practically to the center of the receptacle whereas, on the other hand, the granules which are situated at the height of half of the perforated partition opposite to that comprising the radial air supply duct, are not practically not dried.

Or, les granulés de matière plastique issus de ce réceptacle sont amenés directement dans une machine de transformation et, par exemple, dans une machine de moulage et ce défaut de séchage se traduit par une modification de la structure des objets obtenus et, notamment, par une modification de leur structure mécanique. However, the plastic granules from this receptacle are brought directly into a processing machine and, for example, into a molding machine and this drying defect results in a modification of the structure of the objects obtained and, in particular, by a change in their mechanical structure.

La présente invention a notamment pour but de remédier à ces inconvénients et concerne à cet effet une installation pour le séchage de granulés en matière plastique en vue de leur alimentation dans une machine de transformation, installation caractérisée en ce qu'elle se compose d'un réceptacle se terminant à sa base par un orifice d'évacuation des produits séchés, ce réceptacle comportant intérieurement, sur au moins une partie de sa hauteur, une paroi perforée délimitant un espace lamellaire avec la paroi du réceptacle, ce réceptacle étant pourvu d'un conduit d'alimentation en air de séchage orienté pour déboucher sensiblement tangentiellement à cet espace lamellaire. The object of the present invention is in particular to remedy these drawbacks and to this end relates to an installation for drying plastic granules with a view to feeding them into a processing machine, installation characterized in that it consists of a receptacle ending at its base with an outlet for the discharge of dried products, this receptacle comprising internally, over at least part of its height, a perforated wall delimiting a lamellar space with the wall of the receptacle, this receptacle being provided with a drying air supply duct oriented to open substantially tangentially to this lamellar space.

L'invention est représentée à titre d'exemple non limitatif sur les dessins ci-joints dans lesquels
- la figure 1 est une vue en perspective partiellement arrachée d'une installation conforme à l'invention,
- la figure 2 est une demi-coupe axiale de la zone inférieure de l'installation de la figure 1.The invention is shown by way of non-limiting example in the accompanying drawings in which
FIG. 1 is a partially cutaway perspective view of an installation according to the invention,
- Figure 2 is an axial half-section of the lower zone of the installation of Figure 1.

La présente invention a en conséquence pour but la réalisation d'une installation qui permet d'uniformiser le séchage des granulés de matière plastique destinés à être amenés dans une machine de transformation, cette amélioration qualitative s'accompagnant également d'une amélioration quantitative dans la mesure où elle permet d'augmenter le débit d'air, en général d'air chaud, mis en oeuvre pour ce séchage. The object of the present invention is therefore to provide an installation which makes it possible to standardize the drying of the plastic granules intended to be brought into a processing machine, this qualitative improvement also being accompanied by a quantitative improvement in the since it makes it possible to increase the air flow, in general of hot air, used for this drying.

Cette installation se compose d'un réceptacle 1 dont la zone inférieure 2 est conique et se termine à sa base par une ouverture 3 d'évacuation des granulés séchés. This installation consists of a receptacle 1, the lower zone 2 of which is conical and ends at its base with an opening 3 for discharging the dried granules.

L'extrémité supérieure de ce réceptacle 1 est obturée par un couvercle (non représenté) qui est pourvu d'un conduit d'alimentation en granulés à sécher. The upper end of this receptacle 1 is closed by a cover (not shown) which is provided with a supply line for granules to be dried.

Comme cela est connu, la paroi latérale de ce réceptacle 1 est pourvue d'une fenêtre allongée 11 permettant de vérifier le niveau des granulés à l'intérieur du réceptacle. L'ouverture inférieure 3 est pourvue d'un embout 31 permettant la vidange du réceptacle 1 si cela apparaît nécessaire. As is known, the side wall of this receptacle 1 is provided with an elongated window 11 making it possible to check the level of the granules inside the receptacle. The lower opening 3 is provided with a nozzle 31 allowing the emptying of the receptacle 1 if this appears necessary.

La zone inférieure conique 2 du réceptacle 1 est pourvue intérieurement d'une paroi conique perforée 4 qui délimite avec la paroi 2 un espace lamellaire 5 dans lequel est amené l'air de séchage, cet air étant préférablement de l'air chaud. The conical lower zone 2 of the receptacle 1 is provided internally with a perforated conical wall 4 which delimits with the wall 2 a lamellar space 5 into which the drying air is brought, this air preferably being hot air.

Les perforations de cette paroi 4 sont d'une dimension telle qu'elles ne permettent pas le passage des granulés à sécher, l'extrémité inférieure de cette paroi conique perforée 4 se terminant par un embout 41 se logeant à l'intérieur de l'embout 3 de la trémie conique 2. The perforations of this wall 4 are of such a size that they do not allow the passage of the granules to be dried, the lower end of this conical perforated wall 4 ending in a nozzle 41 being housed inside the tip 3 of the conical hopper 2.

Dans la zone centrale du réceptacle 1, il est également prévu un élément conique perforé 6 dont le sommet est orienté vers le haut du réceptacle 1, cet élément conique étant destiné à assurer une bonne répartition des granulés et à favoriser leur écoulement. In the central zone of the receptacle 1, a perforated conical element 6 is also provided, the top of which is oriented towards the top of the receptacle 1, this conical element being intended to ensure good distribution of the granules and to promote their flow.

Conformément à l'invention, il est prévu un conduit 7 d'alimentation en air de séchage qui est orienté suivant la tangente 21 de la trémie conique 2 de façon que ce conduit 7, perpendiculaire à l'axe de la trémie, produise dans l'espace lamellaire 5 un flux d'air de séchage qui circule en tourbillonnant sur la surface totale de la paroi 4 en pénétrant uniformément dans la masse des granulés, quelle que soit la position angulaire de ces granulés par rapport au débouché 71 du conduit 7 dans la trémie 2. According to the invention, there is provided a duct 7 for supplying drying air which is oriented along the tangent 21 of the conical hopper 2 so that this duct 7, perpendicular to the axis of the hopper, produces in the 'lamellar space 5 a flow of drying air which circulates by swirling over the total surface of the wall 4 while penetrating uniformly into the mass of the granules, whatever the angular position of these granules relative to the outlet 71 of the duct 7 in hopper 2.

Du fait de cette disposition, le jet d'air pénétrant dans l'espace lamellaire 5 ne vient pas heurter directement et immédiatement une paroi qui briserait ce jet d'air mais, au contraire, ce jet d'air s'écoule librement et avec un débit important dans l'espace lamellaire 5 pour aboutir à un effet optimum de séchage. Cet air de séchage est mis en mouvement par une turbine 8 entraînée par un moteur électrique 9, des organes de séchage à résistance chauffante étant de préférence prévus dans un carter jouxtant 10. Due to this arrangement, the air jet entering the lamellar space 5 does not directly and immediately strike a wall which would break this air jet but, on the contrary, this air jet flows freely and with a significant flow in the lamellar space 5 to achieve an optimum drying effect. This drying air is set in motion by a turbine 8 driven by an electric motor 9, drying members with heating resistance preferably being provided in an adjoining casing 10.

Ce carter est alimenté en air par un embout 101, cet air étant soit de l'air ambiant, soit de l'air repris du réceptacle 1 afin de réaliser une installation de séchage fonctionnant en circuit fermé. This casing is supplied with air by a nozzle 101, this air being either ambient air or air taken from the receptacle 1 in order to produce a drying installation operating in a closed circuit.

De préférence, cette conduite tangentielle 7 est située à hauteur du tiers inférieur de la paroi conique perforée 4 et l'espace lamellaire 5 présente une largeur qui diminue progressivement depuis la base de la trémie 2 jusqu'à son sommet, l'ensemble de cette disposition favorisant un mouvement tourbillonnaire ascendant du flux d'air de chauffage en aboutissant à une pénétration uniforme de cet air de chauffage au travers des perforations de la paroi 4 non seulement dans le sens périphérique horizontal mais également dans le sens vertical.  Preferably, this tangential pipe 7 is situated at the height of the lower third of the perforated conical wall 4 and the lamellar space 5 has a width which decreases progressively from the base of the hopper 2 to its top, all of this arrangement favoring an upward swirling movement of the heating air flow leading to a uniform penetration of this heating air through the perforations of the wall 4 not only in the horizontal peripheral direction but also in the vertical direction.

Claims (4)

REVENDICATIONS 1) Installation pour le séchage de granulés en matière plastique en vue de leur alimentation dans une machine de transformation, installation caractérisée en ce qu'elle se compose d'un réceptacle (1) se terminant à sa base par un orifice (3) d'évacuation des produits séchés, ce réceptacle comportant intérieurement, sur au moins une partie de sa hauteur, une paroi perforée (4) délimitant un espace lamellaire (5) avec la paroi du réceptacle, ce réceptacle étant pourvu d'un conduit (7) d'alimentation en air de séchage orienté pour déboucher sensiblement tangentiellement à cet espace lamellaire (5). 1) Installation for drying plastic granules for feeding into a processing machine, installation characterized in that it consists of a receptacle (1) ending at its base by an orifice (3) d discharge of the dried products, this receptacle comprising internally, over at least part of its height, a perforated wall (4) delimiting a lamellar space (5) with the wall of the receptacle, this receptacle being provided with a conduit (7) drying air supply oriented to open substantially tangentially to this lamellar space (5). 2) Installation conforme à la revendication 1, caractérisée en ce que le réceptacle comporte une zone inférieure constituant une trémie de forme générale conique, cette trémie comportant intérieurement la paroi perforée réalisée également de forme conique et délimitant avec la trémie un espace lamellaire. 2) Installation according to claim 1, characterized in that the receptacle comprises a lower zone constituting a hopper of generally conical shape, this hopper internally comprising the perforated wall also made of conical shape and delimiting with the hopper a lamellar space. 3) Installation conforme à l'une quelconque des revendications précédentes, caractérisée en ce que le conduit d'alimentation en air de séchage débouche tangentiellement à l'espace lamellaire sensiblement à hauteur du tiers inférieur de la trémie. 3) Installation according to any one of the preceding claims, characterized in that the drying air supply duct opens tangentially to the lamellar space substantially at the level of the lower third of the hopper. 4) Installation conforme à l'une quelconque des revendications précédentes, caractérisée en ce que l'espace lamellaire (5) est d'une largeur qui décroît progressivement depuis la base de la trémie jusqu'à son bord supérieur.  4) Installation according to any one of the preceding claims, characterized in that the lamellar space (5) is of a width which decreases progressively from the base of the hopper to its upper edge.
FR9103965A 1991-04-02 1991-04-02 PLANT FOR DRYING GRANULES OF PLASTIC MATERIAL FOR THEIR FEEDING IN A PROCESSING MACHINE. Expired - Fee Related FR2674944B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9103965A FR2674944B3 (en) 1991-04-02 1991-04-02 PLANT FOR DRYING GRANULES OF PLASTIC MATERIAL FOR THEIR FEEDING IN A PROCESSING MACHINE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9103965A FR2674944B3 (en) 1991-04-02 1991-04-02 PLANT FOR DRYING GRANULES OF PLASTIC MATERIAL FOR THEIR FEEDING IN A PROCESSING MACHINE.

Publications (2)

Publication Number Publication Date
FR2674944A1 true FR2674944A1 (en) 1992-10-09
FR2674944B3 FR2674944B3 (en) 1993-11-05

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FR9103965A Expired - Fee Related FR2674944B3 (en) 1991-04-02 1991-04-02 PLANT FOR DRYING GRANULES OF PLASTIC MATERIAL FOR THEIR FEEDING IN A PROCESSING MACHINE.

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5561914A (en) * 1996-03-22 1996-10-08 Asplin; Charles L. Sand drying apparatus
WO2007105230A2 (en) * 2006-03-15 2007-09-20 Sowbal Aerothermics Improved device for heating / drying welding rods
ITVR20100158A1 (en) * 2010-08-03 2012-02-04 Moretto Spa HOPPER STRUCTURE, DEHUMIDIFICATION PLANT AND DEHUMIDIFICATION PROCEDURE OF GRANULAR PLASTIC MATERIAL
CN110243156A (en) * 2019-06-17 2019-09-17 安徽山葛老天然食品有限公司 A kind of kudzu-vine root powder preparation processing drying equipment
EP3702709A1 (en) * 2019-02-27 2020-09-02 Wenz Kunststoff GmbH & Co. KG Drying container and method for drying plastic granulate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5561914A (en) * 1996-03-22 1996-10-08 Asplin; Charles L. Sand drying apparatus
WO2007105230A2 (en) * 2006-03-15 2007-09-20 Sowbal Aerothermics Improved device for heating / drying welding rods
WO2007105230A3 (en) * 2006-03-15 2007-11-08 Sowbal Aerothermics Improved device for heating / drying welding rods
ITVR20100158A1 (en) * 2010-08-03 2012-02-04 Moretto Spa HOPPER STRUCTURE, DEHUMIDIFICATION PLANT AND DEHUMIDIFICATION PROCEDURE OF GRANULAR PLASTIC MATERIAL
EP2416100A1 (en) 2010-08-03 2012-02-08 Moretto S.P.A. Hopper structure for a dehumidification plant and method for dehumidifying granular plastic material
US8763273B2 (en) 2010-08-03 2014-07-01 Moretto S.P.A. Hopper structure, dehumidification plant and method for dehumidifying granular plastic material
EP3702709A1 (en) * 2019-02-27 2020-09-02 Wenz Kunststoff GmbH & Co. KG Drying container and method for drying plastic granulate
CN110243156A (en) * 2019-06-17 2019-09-17 安徽山葛老天然食品有限公司 A kind of kudzu-vine root powder preparation processing drying equipment

Also Published As

Publication number Publication date
FR2674944B3 (en) 1993-11-05

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