ES2538836T3 - Product Drying Installation - Google Patents

Abstract

Installation of drying of wet vegetable products, in the form of flat products, irregularly and fragile, to remove surface moisture from them, crossed by the products to dry, installation characterized because it consists of at least one module (200, 200A, 200B , 300A, 300B) drying comprising: - a support surface (100, 100A, 306A, 306B) that receives the products (P) to be dried; - a contact zone (ZC, CS) of the products to be dried defined between the support surface (100) and a dryer surface (210, 210A, 210B) covered by a layer (212, 212A, 212B, 310A, 310B) of microfiber strips in the contact zone (ZC, CS); - a moisture extractor (250, 250A, 350A, 350B) after the contact zone (ZC, CS) according to the direction of movement of the dryer surface (210), to compress the dryer surface and suitable for aspirating moisture from this.

Description

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DESCRIPTION

Product Drying Installation

Field of the Invention

The invention relates to a surface drying plant for products to remove surface moisture and, in particular, to a drying plant for semi-finished plant products to remove surface moisture from the face of its packaging, the wet products circulating through installation.

State of the art

There are currently different procedures and facilities for surface drying of vegetable products, such as lettuce leaves cut and washed.

One of the procedures is to drain the products in a centrifugal drainer. This procedure has the advantage of not raising the temperature of the products, but the inconvenience of exerting mechanical stresses on the products, and of only being able to be carried out in batches, that is to say discontinuously. This procedure does not work for relatively fragile products since centrifugal draining causes the products to undergo mechanical stresses that spoil at least partially the fragile parts of the vegetables, which would deteriorate the appearance, the organoleptic qualities of these.

There is also a drying process in a dry and hot air stream, but this procedure, which has the advantage of not subjecting the products to mechanical stresses with the risk of damaging them, has the disadvantage of specifying a relatively long residence time of 20 minute order. In order for this procedure to be applied continuously, the products must remain inside the drying chamber for that period of time, which represents a long journey within the drying installation and, therefore, a large installation .

This procedure also has the disadvantage of heating, although slightly, the products that then need to be cooled again for packaging and preservation at a temperature generally of the order of 4 ° C and represents a waste of energy.

Also known from US 1 928 993, a fruit drying device. Such a device is not suitable for drying fragile food products such as lettuce leaves, the products being traversed by rollers equipped with prominent fingers.

US 5913590 describes an installation for drying wet vegetable products, such as chunks of lettuce leaves.

Object of the invention

The present invention aims to develop an installation to remove surface moisture from flat, irregular, and fragile products such as plant products that come out of a wash, preserving their fragile structure and quickly and efficiently removing surface moisture.

Description and advantages of the invention

For this, the object of the invention is an installation for drying products such as vegetable products in pieces, to remove surface moisture from these, this installation being characterized in that it comprises at least one drying module comprising:

-a support surface that receives the products to dry; -a contact area of the products to be dried defined between the support surface and a drying surface

covered by a layer of microfiber strips in the contact area; -a moisture extractor after the contact zone according to the direction of movement of the belt

dryer, to compress the dryer surface and aspirate moisture from it.

The drying installation that causes the products to pass through the contact area allows to guarantee an important flow while preserving fragile products, since the contact area between the microfiber strips of the drying surface and the surface of the products to Drying is a contact with virtually no pressure, comparable to a light touch or rubbing; This contact is sufficient to absorb surface moisture from the surface of the products. The absorption is almost instantaneous in the contact area between the microfiber strips and the surface of the products. The touch also has the advantage of allowing the strips to reach into the cavities or bends often in beading like those of the wet surface of a vegetable product, such as a piece of lettuce leaf more so much as the product to dry it is not necessarily flat or does not need to remain flat or flat, that is to say stuck against the support surface. This operation does not intervene in any case in the internal humidity of the product:

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-the contact area of the products to be dried is defined between the support surface and a drying surface constituted by a belt covered by a layer of microfiber strips in the contact area; and -the moisture extractor after the contact zone according to the direction of movement of the belt

dryer to compress the dryer belt and aspirate moisture from it.

Advantageously, the support surface is a conveyor belt that circulates at the same speed as the dryer belt in the contact area, so that the products do not experience any friction linked to a relative speed in the contact zone, put that the products cross the contact area at the same tangential speed as that of the microfiber strips of the dryer belt. This contact, although very short and of short duration, allows however to remove surface moisture very effectively.

In a particularly advantageous manner, the dryer belt is a removable sleeve which has a rotating cylinder. This allows the drying belt to be removed to be treated independently of its drying by extracting moisture downstream from the contact area.

According to an advantageous feature, the moisture extractor is a perforated cylinder, which rotates in contact with the dryer belt to compress it in a compression zone at the height of which the perforated cylinder is connected to a source of depression to aspirate the moisture extracted by the dryer belt and contained therein.

In the case of relatively flat products, such as pieces of vegetables leaving a washing bath, it is especially advantageous that the drying installation consists of two drying modules, paired, which reciprocally constitute the support surface of the one with respect to the another to define each other a contact area through which the products to dry pass. Thanks to the very flexible and deformable structure of the drying belts, the joining surface of the two belts is not a flat surface comparable to a tangent plane, but a flexible area of a certain thickness that favors the delicate conservation of the pieces of Vegetables that pass. Thus, this installation with two paired modules has the advantage of drying both sides of the products, simultaneously, while maintaining the products by simple contact in the interval between the two contact zones of each driven dryer belt.

Especially advantageously, the driven dryer belts of the two paired modules are sleeves mounted on rotating driven cylinders. Although flat products, irregularly shaped, but fragile, pass through the reduced interval between the cylinders, they are delicately maintained by microfiber strips that, by their contact, follow the irregularity of the surfaces and absorb surface moisture even in the bends of surface irregularities.

According to another embodiment especially advantageous for the flow and drying speed of especially fragile products, each drying module is a conveyor with a conveyor belt provided with a layer of microfiber strips, the modules being mounted substantially parallel to each other. , a lower module and an upper module above the lower module from which the facing branches define a contact area in the form of a passage; and of a management installation that manages the speed of movement of the conveyor belts, being any other branch that is not the one that defines the drying passage equipped with a moisture extractor.

These drying modules with belt conveyors allow for a particularly long contact time between the layer of microfiber strips and the surface of the products, which allows an especially effective drying in the case especially of products with a very twisted shape and that they can be difficult for drying by very short contact with the layer of microfiber strips.

Thanks to the length of the contact area, that is to say the drying passage, it is easy to adapt the height of the drying passage to the nature of the products, all the more so since this adjustment can be done continuously and that the opposite branches of The two conveyor belts with their layer of microfiber strips are not necessarily rectilinear but may have a certain inclination, thereby modifying the profile of the drying passage along the product path.

This variation can be continuous in increasing or decreasing sense. It can also alternate between growth and decrease phases to favor the change of microfiber site with respect to the surface of the products.

According to the invention, the separation of the two modules is adjustable to define the height of the drying passage, a height that is not necessarily uniform as indicated.

Finally, the travel speed of the conveyor belts is controlled by the management facility. This travel speed can be the same for the two conveyor belts so that the products remain in principle motionless with respect to the conveyor belts along their entire length through the drying passage. But according to a variant, the speed of the two conveyor belts is different, preferably slightly different, so that each face of the product is subjected to a force, either in the direction of the drive, or in the sense of retention, which creates by difference a slight relative movement between one or the other, even the two layers of microfiber strips of the drying module.

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According to another advantageous feature, several drying modules with conveyor belt are installed in series, either one after the other, either one above the other to perform a more progressive and delicate drying of products that are especially fragile or that allow An important product flow.

Advantageously, this is formed by a succession of elementary installations each consisting of a drying module formed by a conveyor with conveyor belt provided with a layer of microfiber strips, mounted substantially parallel to each other, a lower module and a upper module above the lower module delimiting with this a drying passage, as well as by a management facility that manages the speed of movement of the conveyor belts of each drying module, as well as by a guide to drive the output products of an elementary installation at the entrance of the following elementary installation, these installations being mounted in series located one after the other or one above the other.

In general, the drying installation as defined above allows very efficient drying with simple means of realization and an especially easy maintenance for food applications, such as drying of leaves or pieces of vegetables.

Drawings

The present invention will now be described in more detail with the aid of a flat product drying plant shown in the accompanying drawings, in which:

-Figure 1 is a schematic sectional view of a product drying module; -Figure 2 shows a particular embodiment of the module of a product drying installation; -Figure 3 is a schematic sectional view of a product drying installation formed by the

pairing of two drying modules; -Figure 4 is a schematic view of another embodiment of a drying installation formed by two

belt conveyors to dry both sides of the products; -Figure 5 is a schematic view of an installation formed by two parts mounted in series and

each constituted by an installation like the one in figure 4, one after the other; -Figure 6 shows another variant of installations combined in series with overlapping of two installations

elementals like those in figure 4.

Description of embodiments of the invention

According to Figure 1, the object of the invention is an installation 1 for drying the wet surface, irregularly with cavities and roughnesses, of flat products, such as leaves or pieces of vegetable leaves, fragile products and wet surfaces when they leave of an upstream treatment stage, such as passing through a bath or spraying area. These products P reach a support surface 100 to pass to the drying module 200 of the installation. This drying module 200 is composed of a drying surface which, in this example, is a drying belt 210, driven in motion in the direction of the arrow A, to pass through guide cylinders 220, 221 that define the path of the tape and on a support 222 defining with the support surface 100 facing a contact zone ZC of the products P to be dried. The dryer belt 210, driven, is a belt covered by a layer 212 of microfiber strips that freely exit the belt support surface 211. Downstream of the contact zone ZC, the belt 210 passes over a bearing surface constituted by a rotating cylinder 213 to cooperate with a moisture extractor having a suction zone ZA, in the drying interval that runs through the dryer belt 210 covered by microfiber strips. Next, the belt 210 follows the circulation path through a treatment installation 260, for example a box with ultraviolet light or a diffusion box of a treatment gas to eliminate any germs that persist in the tape, then the tape Go back to the contact zone ZC.

The moisture extractor 250 is constituted by a perforated, rotating cylinder 251, inside which an aspiration chamber 252 is located, which defines a sector 253 with depression at the height of the aspiration zone ZA of the perforated cylinder 251 facing the presser cylinder 213 to place the holes of the perforated cylinder 251 in depression and thereby aspirate the moisture extracted from the layer 212 of microfiber strips, such that the dryer belt 210 leaves this interval ZA in the dry state.

Figure 2 shows another drying installation 1A with a particular embodiment mode 200A of the drying module 200 of Figure 1. In this embodiment 200A, the driven dryer belt 210A is carried by a cylinder 220A driven in rotation in the direction of the arrow A. The general elements already described in Figure 1 are resumed in this embodiment without being represented in Figure 2.

The pressing cylinder of the suction zone ZA with the moisture extractor 250A is replaced here by the cylinder 220A carrying the sleeve constituting the dryer belt 210A. This sleeve 210A is preferably mounted removably on the cylinder 220A, which allows it to be replaced from time to time for deep cleaning, for a treatment or even to replace the sleeve of which the strips 212A are worn.

In this example, the support surface 100A is constituted by a fixed surface. But this fixed 100A surface

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it can also be constituted, for example, by a conveyor belt, such that the products P to be dried do not experience any differential speed when passing through the zone ZC of contact with the driven dryer belt 210A, since the tangential speeds will be the same .

Figure 3 shows another embodiment of a product drying installation 1B. This embodiment differs from the previous embodiments because it consists of two drying modules 200A, 200B, paired and in particular identical. The support surface of one of the modules 200A, 200B is constituted each time by the dryer belt 210A, 210B of the other module. In this particular example, the dryer belts 210A, 210B are carried by rotating cylinders 220A, 220B which define each other an interval through which the products P pass. The two modules 200A, 200B are installed symmetrically with respect to a vertical median plane according to the orientation of figure 3. The feeding with products P is made from a ramp 270 that unloads the products P on the surface of the belt 210A, 210B dryer of one of the cylinders 220A, 220B or directly in the interval The P products are delicately collected by layers 212A, 212B of strips that are placed with more or less relief by the rotational movement of the two cylinders 220A, 220B to pass virtually no pressure through the interval between the two cylinders, with the only contact of the microfiber strips of layers 212A, 212B that absorb surface water on both sides of the P products. Dry P products leaving the contact area reach an evacuation belt 271.

According to Figure 4, another embodiment of a drying installation 1C for flat products with irregular and fragile structure, such as leaves or pieces of vegetable leaves, wet, as for the previous installations, is composed of two modules 300A, 300B drying of similar structure, with conveyor belt conveyors each covered with a layer of microfiber strips. The conveyors are installed opposite each other in a horizontal or substantially horizontal position, in the example presented they form a drying passage CS to receive in it the products (P) to be dried by transporting them.

The operation of the installation 1C is managed by a control unit 10 which manages the drying modules 300A, 300B, the speed V1, travel and drying V2, as well as other parameters, such as the separation (e) of the two conveyors that define the interval depending on the nature of the products to be dried. This also controls the operation of the 350A, 350B moisture extractors and the 360A, 360B treatment devices of the drying belt (drying surface) of each drying module 300A, 300B.

In more detail:

The lower drying module 300A constitutes by its upper branch the support and transport surface on which the products arrive. This is schematically composed of a conveyor 301A of conveyor belt 302A carrying a layer 312A of microfiber strips that passes over two return cylinders 303A, 304A of which at least one (304A) is a drive cylinder equipped with a 305B engine. The upper branch of the conveyor belt 302A defining the drying passage CS is supported by a support 306A, such as a sliding plate, an air cushion plate, a succession of rollers or even lateral guides for the crossbar heads (not shown) integrated in the conveyor belt 302A, to guide and support it, so that it defines the drying passage CS. The conveyor belt 302A circulates in the direction and at the indicated speed V1. The return branch passes through a moisture extractor 350A represented very schematically and consisting of one or more cylinders 351A, 352A extractors. It also consists of a 360A treatment installation, for example an installation with UV ultraviolet rays to disinfect the return branch. The lower branch is supported by a support or guide 307A, such as a sliding plate or with an air cushion, a succession of rollers or lateral guides for the crossbar heads integrated in the conveyor belt and rests against the cylinders 351A , 352A of moisture extractor 350A by means of a cylinder 311A, 312A presser associated with each cylinder 351A, 352A extractor. The moisture extractor 350A is preferably mobile with respect to the return branch, as this is schematized by an actuator 353A connected to the control unit 10 to execute a reciprocating VV movement with respect to the belt 302A and so that the Extractor cylinders 351A, 352A having a structure similar to that of cylinders 250, 250A shown in Figures 1-3 not only roll on layer 312A of microfiber strips, but combine with this rolling movement a sliding movement in one way or the other way to increase the efficiency of moisture extraction. In case of movement of the extractor cylinders 351A, 352A, the presser 311A, 312A cylinders continue the movement while facing the extractor cylinders. The upper drying module 300B, located above the lower drying module 300A has an almost similar structure; define with this the drying passage CS. The upper module 300B preferably has a slightly shorter length than that of the lower module 300A to facilitate the arrival of the products (P) on the upper branch of the conveyor 301A of the lower module 300A and its regular distribution in a layer before entering in contact with the upper module 300B. The upper module 300B is composed of a conveyor 301B with conveyor belt 302B carrying a 310B layer of microfiber strips. The conveyor belt 302B with the layer 310B passes over two return cylinders 303B, 304B of which at least one (304B) is a driven cylinder, equipped with a 305B engine. The lower branch of the conveyor belt 302B defining the drying passage CS with the homologous branch of the belt 302A of the drying module 300A rests, where appropriate, on the back against the support 306B, such

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as a sliding plate, so as to maintain the regularity of the interval between the two conveyors 300A, 300B.

If necessary, the upper conveyor belt 300B can be guided and supported by a support or guide 306B for its lower branch on the sides, so as to prevent the lower branch from forming an arrow and reducing the height of the drying passage CS by supporting on the products to be dried, with the risk of damaging them by partially crushing them.

The upper conveyor belt 302B can also be stiffened by transverse bars, of which the ends of each side are guided, for example, by non-detailed rails.

The conveyor belt 302B passes over two return cylinders 303B, 304B of which one (304B) is equipped with a motor 305B connected to the control unit 10 which guarantees the adjustment of the travel speed V2 of this conveyor belt 302B.

The return branch of the conveyor belt 302B passes through a moisture extractor 350B consisting of extractor cylinders 351B, 352B and, to guarantee this cooperation, the return branch, for example, is supported by a plate or other supporting element 307B, such that it is positioned in an appropriate position with respect to the extractor cylinders 351B, 352B which may have the same structure as the perforated cylinder 250 of Figure 1.

311B, 312B presser cylinders cooperate with the extractor cylinders.

The moisture extractor 350B is equipped with a 353B actuator to control a reciprocating VV movement of the 351B cylinders, 352B extractors of the 311B cylinders, 312B presses and the 360B treatment facility for faster and more efficient action without excluding, however, the operation of the device 350B in a fixed position with respect to the conveyor 301B.

The installation 1C is equipped with a device 11 for adjusting the height (e) of the drying passage CS depending on the nature of the products to be dried, their thickness in random position, the structure and the fragility of the products . This setting is useful for better drying efficiency, while preserving the products to have as good contact as possible with the microfibers without damaging or crushing the products during their passage through the drying passage.

The travel speed V1, V2 of the two conveyor belts 302A, 302B is selected according to the nature of the products to be dried. The installation allows an equal travel speed to be adjusted, so that the products retain their position with respect to the two conveyor belts for their passage through the drying passage. But, depending on the nature of the products, it may be interesting to make the drying modules 300A, 300B operate at slightly different travel speeds V1, V2, for example by causing the tape 302B of the upper module 300B to circulate at a speed V2 slightly lower than the V1 of the lower module 300A, so that the products driven at the speed V1 of the lower belt 302A rub in one direction against the upper belt V2 or that it drives them.

The opposite is also possible, that is to say a travel speed V1 for the lower belt 302A that is lower than that of the upper belt 302B, such that the upper belt rubs on the products in another direction and thus ensures drying especially effective of the upper surface of the leaves.

According to the case, the products (P) rub against the lower belt 302A and the upper belt 302B at the same time.

The tests carried out within the framework of the invention have shown that the surface moisture of the products at the exit of the drying plant was less than 3%. The installations of figures 3 and 4 preserve in a more particular way the fragile structure of the products, because there is no compression but a simple contact and without or little friction since there is little difference in speeds. This contact is, however, sufficient to effectively collect surface moisture on both sides.

According to other embodiments, in the case of products having a specially twisted surface, several modules or modules can be mounted in cascade, so that the efficiency of the absorption of surface moisture of the products is further increased. products.

Figure 5 shows in a simplified way an example of drying installation 1D composed of two parts 1C, 1C 'each constituted by a drying installation according to figure 4, mounted one after the other in series, to dry products more quickly They have twisted surfaces, which retain a lot of water in hard-to-reach cavities.

These two installations 1C, 1C ’that form the global 1D installation can be separated by a non-represented turning equipment that receives the products at the exit of the first part 1C of the installation to transfer them in an inverted position to the second part 1C’.

According to one variant, installations 1C, 1C ’are height-adjustable with respect to each other, so that

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Depending on the nature of the products, their size and other parameters, the output height of the first installation 1C can be adjusted with respect to the input of the second installation 1C '(or vice versa or in combination) and according to the trajectory of Statistically, the flat products arrive in an inverted position at the entrance of the lower conveyor of the second installation 1C '.

Figure 6 shows in a very simplified manner another embodiment of a drying installation 1E composed of two parts each formed by an installation 1C, 1C 'cooperating with one another in series, but arranged practically one above the other . Each of these facilities corresponds to the simple installation represented more fully in Figure 4. The representation of each of the installations 1C, 1C ’is limited to the essential elements.

The products arrive at the lower conveyor of the upper installation 1C and then transfer them to the lower installation 1C ', either by fall or, preferably, by a guide that receives the flat products at the exit of the first installation to guide them if possible towards the second installation and, taking advantage of this transfer, flip the flat products.

This turning can also be favored or carried out by means of a guide 12 formed by a curved surface, which covers the exit of the conveyor belt of the first part of the installation, around the exit cylinder to force the products, such as sheets or pieces of sheets, so that they retain their relative position with respect to the lower conveyor, and thus arrive in a turned position under this conveyor.

According to other variants, the drying modules or the installations of figures 1, 4 can be combined.

The different installations, as this has been described in particular for Figure 4, are equipped with a control unit 10 which manages the operation of the drying installation in combination with the other parts of a more upstream and downstream more global installation. The different installations or parts of installations advantageously consist of an adjustment device that allows the interval of the drying zone to be adjusted as the height of the drying passage depending on the nature of the products, their size and their fragility.

The present invention is mainly applied to drying the surface water of vegetable products, such as lettuce pieces that come in particular from a wash bath.

NOMENCLATURE

1, 1A, 1B, 1C, 1D Drying installation 10 Control unit 11 Actuator for adjusting the height of the drying passage 12 Guide 100 Support surface 200 Drying module 210 Drying surface, dryer belt 211 Belt support surface 212 Layer of microfiber strips / microfiber strips 213 Presser cylinder 220 Belt guide cylinder 221 Belt guide cylinder 222 Support surface 250 Moisture extractor 251 Perforated cylinder 252 Suction chamber 253 Sector with depression 260 Treatment facility 270 Ramp

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271

Evacuation tape

P

Product

ZC

Contact area

ZA

Support zone

5

ZS Drying zone

CS

Drying passage

and

Drying passage height

V1, V2

Conveyor belt travel speed

VV

Alternate movement of the drying device

10

100A Support surface

200A

Drying module

200B

Drying module

210A

Dryer belt

210B

Dryer belt

fifteen

212A Layer of microfiber strips / microfiber strips

212B

Microfiber strips

220A

Cylinder carrying the dryer belt

220B

Cylinder carrying the 210B dryer belt

250A

Moisture extractor

twenty

300A, B Drying module

301A, B

Belt conveyor

302A, B

Conveyer belt

303A, B

Return cylinder

304A, B

Return cylinder

25

305A, B Engine

306A, B

Support / support

307A, B

Support / support

310A, B

Layer of microfiber strips

311A, B

Presser cylinder

30

312A, B Presser cylinder

350A, B

Moisture extractor

351A, B

Extractor cylinder

352A, B

Extractor cylinder

353A, B

Actuator

35

360A, B Treatment facility

Claims (11)

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one.

Installation of drying of wet plant products, in the form of flat products, irregularly and fragile, to remove surface moisture from them, crossed by the products to dry, installation characterized because it consists of at least one module (200, 200A, 200B , 300A, 300B) drying comprising:

-a support surface (100, 100A, 306A, 306B) that receives the products (P) to dry; -a contact zone (ZC, CS) of the products to be dried defined between the support surface (100) and a dryer surface (210, 210A, 210B) covered by a layer (212, 212A, 212B, 310A, 310B) of microfiber strips in the contact zone (ZC, CS); -a moisture extractor (250, 250A, 350A, 350B) after the contact zone (ZC, CS) according to the direction of movement of the dryer surface (210), to compress the dryer surface and suitable for aspirating moisture from is.

2.

Installation according to claim 1,

characterized because The dryer surface (210) consists of a belt covered by a layer (212) of microfiber strips. 3. Installation according to claim 1, characterized because The support surface (100) is a conveyor belt suitable for driving at the same speed as the belt (210) dryer in the contact zone (ZC). 4. Installation according to claim 1, characterized because The dryer surface (210) is a sleeve carried by a rotating cylinder (220A). 5. Installation according to claim 1, characterized because The moisture extractor (250) is a perforated cylinder (251), which rotates in contact with the dryer surface (210) to compress it into a level compression zone (ZA) in which the perforated cylinder (251) is connected to a source (252) of depression to aspirate the moisture extracted by the dryer surface (210) contained therein. 6. Installation according to claim 1, characterized because It consists of two modules (200A, 200B, 300A, 300B) of drying, paired, which reciprocally constitute the support surface of each other with respect to each other to define a contact zone (ZC) between which the products pass (P ) to dry. 7. Installation according to claim 6, characterized because Each drying module (300A, 300B) is a belt conveyor (301A, 301B) (302A, 302B) conveyor provided with a layer (310A, 310B) of microfiber strips, the modules being mounted substantially parallel to each other, a lower module (300A) and an upper module (300B) above the lower module of which the opposing branches define a passage zone (ZC) in the form of a passage (CS); and of a management installation (10) that manages the travel speed of the conveyor belts (302A, 302B), any other branch other than the one defining the drying passage (CS) equipped with an extractor (250A, 250B ) moisture. 8. Installation according to claim 7, characterized because The separation of the two modules (300A, 300B) from the installation (1C) is adjustable to define the height (e) of the drying passage (CS). 9. Installation according to claim 6, characterized because The travel speed (V1, V2) of each of the conveyor belts (302A, 302B) is controlled by the management installation (10). 10. Installation according to claim 7, characterized because It is formed by a succession of elementary installations each consisting of two drying modules (300A, 300B) each formed by a conveyor with belt (302A, 302B) conveyor provided with a layer (310A, 310B) of microfiber strips, mounted substantially parallel to each other, a lower module (300A) and an upper module (300B) above the lower module delimiting with it a drying passage (CS), as well as by a management facility that manages the travel speed of the Conveyor belts (302A, 302B) of each drying module, as well as a guide (12) to drive the products of the output of an installation 9 elementary to the entrance of the next elementary installation, these installations being mounted in series located one after the other or one above the other. 11. Installation according to claim 1, characterized because The module (200) consists of a dry dryer surface treatment device (260) at the exit of the moisture aspiration zone (ZA). 10