EP0937956A1 - Apparatus for heat treatment of continuously moving webs - Google Patents
Apparatus for heat treatment of continuously moving webs Download PDFInfo
- Publication number
- EP0937956A1 EP0937956A1 EP99420045A EP99420045A EP0937956A1 EP 0937956 A1 EP0937956 A1 EP 0937956A1 EP 99420045 A EP99420045 A EP 99420045A EP 99420045 A EP99420045 A EP 99420045A EP 0937956 A1 EP0937956 A1 EP 0937956A1
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- European Patent Office
- Prior art keywords
- air
- assembly
- infrared
- module
- blowing
- 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.)
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 9
- 238000007664 blowing Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 19
- 230000005855 radiation Effects 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 3
- 239000004753 textile Substances 0.000 claims description 3
- 239000002826 coolant Substances 0.000 abstract 2
- 239000000109 continuous material Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000000576 coating method Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
- F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
- F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
Definitions
- the present invention relates to the field of manufacture and processing of sheet materials, such as than papers or films or textile products, or sheet metal products, and it relates, more particularly to a device intended for the treatment thermal of this kind of material, for example in order to their drying, this treatment being carried out on the material in continuously moving sheet, in the form of a strip uninterrupted more or less wide. he can here, in particular, paper manufacturing layer.
- the size of hoods used affects stability and maneuverability of the sheet that runs through them.
- the sheet becomes difficult to control, because the distance between two points that can guide it widens until it becomes critical. This results in a increased risk of leaf breakage, risk that is returned all the more important as the speeds of sheet and air flow.
- drying installations strip products including paper, which include an infrared radiation module in particular with electric infrared emitters, module to which follows, further down in the direction of travel of the sheet material, a blowing assembly and air intake.
- the infrared module is completely dissociated from the assembly blowing and suction air, and located outside from this set, from which it can be separated by a interval (case of document WO 8809845 A) or even by a thermally insulating wall (case of the document WO 8904890 A).
- the present invention aims to eliminate all disadvantages previously outlined, providing a device which, for a space requirement in length strongly reduced, significantly improves overall thermal efficiency and avoids the risk of breakage or destruction of the treated leaf.
- the present invention relates to a device for the heat treatment of materials in continuously scrolling sheet, comprising at least one module of infrared radiation, comprising emitters of electric type, and a blowing assembly and air intake, traversed longitudinally by the sheet material, the device being characterized in that the infrared emitter module is incorporated in the upstream part of the blowing assembly and air intake, inside this set.
- the invention proposes to integrate indoor infrared emitters a device such as an air cushion hood for the evacuation of the water contained in a sheet, in particular of paper. In this way we remove causes of energy loss, because all the energy dissipated by the infrared module remains inside the hood, and therefore finds usable.
- the heat transfer will be made by the infrared radiation directed onto the sheet.
- the air blown and aspirated, especially downstream of the transmitter module infrared radiation, will no longer have functions essential than performing mass transfer, i.e. the evacuation of the water evaporated by the energy contribution of infrared radiation, and also to support the leaf while scrolling.
- the device can therefore operate with low air temperatures, of the order of 110 to 130 ° C.
- the device comprises means which return the cooling air from the transmitters infrared of the aforementioned module and which then inject this air in the air heating boxes, without intake of external energy to heat the air.
- a pre-heating of the fresh air, directed towards the module infrared radiation emitter to ensure its cooling is achievable by means of an exchanger also crossed by the air extracted from the assembly blowing and suction, this extract air containing water or other evaporated product to drain.
- the thermal efficiency of the device (yield of the transfer operation of heat from the source to the leaf) is excellent.
- the invention thus makes it possible to use transmitters electric type infrared, with overall efficiency of the device which is about 75% to 80%, while the current infrared systems do not exceed 30 or 40% while the efficiency of an air flow transfer is about 70%.
- the invention makes it possible to reduce from two to four times the length of the device, compared to a conventional hood, allowing for example a passage with a length of 9 meters to a length of 3 meters, which gives reduced free leaf lengths, very favorable for fast machines. Thanks to this important shortening, the device which is the subject of the invention can also be inserted without difficulty in existing installations.
- the device shown in the drawing ensures the heat treatment, including drying, of a material in sheet designated by the reference 1, which scrolls continuously in the direction indicated by the arrow F, i.e. from right to left with reference to the figure.
- Sheet material 1 thus passes longitudinally through a blowing assembly and air intake, generally designated by the reference 2.
- the material sheet 1 goes through a temperature rise equipment not shown, located upstream of said assembly 2 and does not not the subject of the present invention.
- Blowing and air suction assembly 2 includes an upper part 3, surmounting the material in sheet 1 to be treated, and a lower part 4, located below the path of this sheet material 1.
- These two parts 3 and 4 in the form of boxes include, distributed over their length, of the organs respectively designated by 5 and 6, which provide blowing and air intake, as suggested by the small arrows f, so as in particular to ensure the levitation of the sheet material 1, in its crossing of the assembly 2.
- a radiation module infrared 7 is incorporated in the upstream part of the blowing and air suction assembly 2, at inside this set 2.
- Module 7 here includes, on the side of the upper part 3 of the assembly 2, infrared emitters 8 of electrical type.
- This module 7 is completed, on the side of the lower part 4 of the assembly 2, by a reflector 9 located opposite the infrared emitters 8.
- a reflector 9 located opposite the infrared emitters 8.
- the infrared radiation module 7 comprises, for cooling its infrared emitters 8, a fresh air supply 10 from outside. On leaving module 7, the air from warmed cooling is injected through appropriate guide 11, in the air supply box that constitutes the upper part 3 of the assembly 2, and this air is also brought through a duct 12 into the box consisting of the lower part 4.
- the exchanger 13 is also traversed by the extracted air, coming directly from the part upper 3 of the suction blowing assembly 2, and indirectly (via a conduit 14) from the bottom 4 of this assembly 2, this air then being directed towards a evacuation.
- the infrared radiation 7 provides heat transfer to the sheet material 1, as it enters the assembly 2.
- the hot air extracted containing the evaporated water, passes through the exchanger 13 which preheats the fresh air directed to the infrared radiation module 7.
- the extraction of extracted air also ensures extraction evaporated water, and the sheet material 1 comes out of the whole 2 being dried.
- the device applies especially in the fields of paper, synthetic films and textile products, during manufacture or treatment.
- This device can also be applied to processing of sheet metal products, for example for drying coatings deposited on such products metallic.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
La présente invention concerne le domaine de la fabrication et du traitement de matériaux en feuille, tels que papiers ou films ou produits textiles, ou encore produits en feuille métalliques, et elle se rapporte, plus particulièrement, à un dispositif destiné au traitement thermique de ce genre de matériaux, par exemple en vue de leur séchage, ce traitement étant effectué sur le matériau en feuille défilant en continu, sous la forme d'une bande ininterrompue de plus ou moins grande largeur. Il peut s'agir ici, en particulier, de la fabrication de papier couché.The present invention relates to the field of manufacture and processing of sheet materials, such as than papers or films or textile products, or sheet metal products, and it relates, more particularly to a device intended for the treatment thermal of this kind of material, for example in order to their drying, this treatment being carried out on the material in continuously moving sheet, in the form of a strip uninterrupted more or less wide. he can here, in particular, paper manufacturing layer.
A l'heure actuelle, dans le domaine de la papeterie et plus particulièrement en séchage de couche, après la dépose d'une couche par une machine appropriée, il convient d'éliminer le plus rapidement possible l'eau contenue dans le papier, par une opération de séchage. A cet effet il est habituel d'installer, juste après la machine de dépose de couche, un appareil émetteur de rayonnement infrarouge, de type électrique ou à gaz, pour atteindre un certain niveau de l'humidité qui permet le contact du papier avec un cylindre de détour, avant de faire entrer le papier dans une hotte de séchage, ceci du moins dans les installations actuellement les plus rapides.At present, in the field of stationery and more particularly in layer drying, after the deposition of a layer by an appropriate machine, water should be removed as quickly as possible contained in the paper, by a drying operation. AT this effect it is usual to install, just after the diaper deposition machine, a transmitter device infrared radiation, electric or gas type, for reach a certain level of humidity which allows the contact of the paper with a detour cylinder, before put the paper in a drying hood, this less in the facilities currently the more fast.
Cette configuration connue nécessite des puissances de rayonnement infrarouge importantes car, compte tenu des vitesses des machines, des densités de rayonnement élevées sont nécessaires pour faire pénétrer en très peu de temps une quantité d'énergie importante dans la feuille, afin d'obtenir une montée en température importante. Ensuite, il convient de poursuivre l'apport calorique pour mettre la feuille en évaporation, et enfin évacuer l'eau évaporée. Pour ces dernières opérations, la technique la plus courante consiste à utiliser une hotte à coussin d'air que le papier traverse sans aucun contact mécanique, la feuille étant suspendue entre les deux flux d'air, l'un inférieur et l'autre supérieur. Afin d'effectuer un transfert thermique, l'air soufflé pour former lesdits flux est chauffé, et l'action de ces mêmes flux d'air permet d'évacuer l'eau qui s'évapore. La hotte à coussin d'air conjugue ainsi un effet thermique et un effet de transfert de masse permettant d'évacuer l'eau extraite de la feuille par l'effet thermique.This known configuration requires significant infrared radiation powers because, taking into account machine speeds, densities of high radiation is needed to penetrate in a very short time a significant amount of energy in the sheet, in order to obtain a rise in temperature important. Then, it is advisable to continue the contribution caloric to evaporate the leaf, and finally drain off the evaporated water. For these latter operations, the the most common technique is to use a cooker hood air cushion that the paper passes through without any contact mechanical, the sheet being suspended between the two streams air, one lower and the other upper. To perform a heat transfer, the air blown to forming said streams is heated, and the action of these same air flow allows evacuating water to evaporate. The hood air cushion thus combines a thermal effect and a mass transfer effect to evacuate water extracted from the sheet by the thermal effect.
Le principal inconvénient de telles hottes, utilisées dans le domaine de la papeterie, est leur faible capacité de transfert thermique. Or, plus les machines à papier fonctionnent à vitesse élevée, plus la quantité d'eau à évaporer augmente, et plus la taille des hottes utilisées devient importante, celles-ci tendant ainsi à être de plus en plus longues.The main drawback of such hoods, used in stationery, is their low heat transfer capacity. However, the more paper operate at high speed, the higher the quantity of water to evaporate increases, and the more the size of the hoods used becomes important, these thus tending to be longer and longer.
Toutefois, à partir d'une certaine limite, la taille des hottes utilisées influe sur la stabilité et la maniabilité de la feuille qui les parcourt. En particulier, la feuille devient difficilement contrôlable, car la distance entre deux points qui peuvent la guider s'élargit jusqu'à devenir critique. Il en résulte un risque accru de casse de la feuille, risque qui est rendu d'autant plus important que l'on augmente les vitesses de la feuille et des flux d'air.However, from a certain limit, the size of hoods used affects stability and maneuverability of the sheet that runs through them. In particular, the sheet becomes difficult to control, because the distance between two points that can guide it widens until it becomes critical. This results in a increased risk of leaf breakage, risk that is returned all the more important as the speeds of sheet and air flow.
De plus, les tentatives d'augmentation du transfert thermique par accroissement des températures et des vitesses des flux d'air conduisent à un chauffage excessif de la feuille, lequel peut avoir pour conséquence une destruction de la feuille ou, du moins, d'une partie de celle-ci.In addition, attempts to increase the heat transfer by increasing temperatures and air flow velocities lead to heating excessive leaf, which may result in destruction of the sheet or, at least, of part of it.
On connaít aussi, par des documents tels que les demandes de brevets WO 8809845 A, DE 4029488 A, WO 8904890 A et FR 2630532 A, des installations de séchage de produits en bande, notamment de papier, qui comprennent un module de rayonnement infrarouge en particulier avec émetteurs infrarouges de type électrique, module auquel fait suite, plus en aval dans le sens de défilement du matériau en feuille, un ensemble de soufflage et d'aspiration d'air. Dans toutes ces réalisations, le module infrarouge est entièrement dissocié de l'ensemble de soufflage et d'aspiration d'air, et situé à l'extérieur de cet ensemble, dont il peut être séparé par un intervalle (cas du document WO 8809845 A) ou même par une paroi thermiquement isolante (cas du document WO 8904890 A). La seule véritable liaison entre le module infrarouge, d'une part, et l'ensemble de soufflage et d'aspiration, d'autre part, est donc celle assurée par la circulation de l'air entre ces deux parties. Il en résulte des déperditions d'énergie importantes, de sorte que le rendement global de telles installations ne peut actuellement excéder 30 à 40%.We also know, by documents such as patent applications WO 8809845 A, DE 4029488 A, WO 8904890 A and FR 2630532 A, drying installations strip products, including paper, which include an infrared radiation module in particular with electric infrared emitters, module to which follows, further down in the direction of travel of the sheet material, a blowing assembly and air intake. In all these achievements, the infrared module is completely dissociated from the assembly blowing and suction air, and located outside from this set, from which it can be separated by a interval (case of document WO 8809845 A) or even by a thermally insulating wall (case of the document WO 8904890 A). The only real link between the module infrared, on the one hand, and the blowing assembly and suction, on the other hand, is therefore that ensured by the air circulation between these two parts. The result significant energy losses, so that the overall performance of such facilities can only currently exceed 30 to 40%.
La présente invention vise à éliminer tous les inconvénients précédemment exposés, en fournissant un dispositif qui, pour un encombrement en longueur fortement réduit, améliore notablement le rendement thermique global et évite les risques de casse ou de destruction de la feuille traitée.The present invention aims to eliminate all disadvantages previously outlined, providing a device which, for a space requirement in length strongly reduced, significantly improves overall thermal efficiency and avoids the risk of breakage or destruction of the treated leaf.
A cet effet, la présente invention a pour objet un dispositif pour le traitement thermique de matériaux en feuille défilant en continu, comprenant au moins un module de rayonnement infrarouge, comportant des émetteurs de type électrique, et un ensemble de soufflage et d'aspiration d'air, traversé longitudinalement par le matériau en feuille, le dispositif étant caractérisé en ce que le module émetteur de rayonnement infrarouge est incorporé dans la partie amont de l'ensemble de soufflage et d'aspiration d'air, à l'intérieur de cet ensemble.To this end, the present invention relates to a device for the heat treatment of materials in continuously scrolling sheet, comprising at least one module of infrared radiation, comprising emitters of electric type, and a blowing assembly and air intake, traversed longitudinally by the sheet material, the device being characterized in that the infrared emitter module is incorporated in the upstream part of the blowing assembly and air intake, inside this set.
Ainsi, contrairement à l'enseignement de tous les documents précités, l'invention propose d'intégrer des émetteurs de rayonnement infrarouge à l'intérieur même d'un dispositif du genre hotte à coussin d'air servant à l'évacuation de l'eau contenue dans une feuille, notamment de papier. De cette manière on supprime des causes de déperdition d'énergie, car toute l'énergie dissipée par le module infrarouge reste à l'intérieur de la hotte, et se trouve donc utilisable.So, contrary to the teaching of all aforementioned documents, the invention proposes to integrate indoor infrared emitters a device such as an air cushion hood for the evacuation of the water contained in a sheet, in particular of paper. In this way we remove causes of energy loss, because all the energy dissipated by the infrared module remains inside the hood, and therefore finds usable.
En fonctionnement, après une montée en température de la feuille assurée par des équipements classiques au gaz ou à l'électricité (situés en amont du dispositif de l'invention), le transfert thermique sera fait par le rayonnement infrarouge dirigé sur la feuille. L'air soufflé et aspiré, notamment en aval du module émetteur de rayonnement infrarouge, n'aura plus comme fonctions essentielles que d'effectuer le transfert de masse, c'est-à-dire l'évacuation de l'eau mise en évaporation par l'apport énergétique du rayonnement infrarouge, et aussi d'assurer la sustentation de la feuille en défilement.In operation, after a temperature rise of the sheet provided by conventional equipment at gas or electricity (located upstream of the the invention), the heat transfer will be made by the infrared radiation directed onto the sheet. The air blown and aspirated, especially downstream of the transmitter module infrared radiation, will no longer have functions essential than performing mass transfer, i.e. the evacuation of the water evaporated by the energy contribution of infrared radiation, and also to support the leaf while scrolling.
Un tel dispositif peut donc fonctionner avec des températures d'air faibles, de l'ordre de 110 à 130° C. Avantageusement, le dispositif comporte des moyens qui reprennent l'air de refroidissement des émetteurs infrarouges du module précité et qui injectent ensuite cet air dans les caissons de chauffage d'air, sans apport d'énergie externe pour chauffer l'air. On notera aussi qu'un pré-chauffage de l'air neuf, dirigé vers le module émetteur de rayonnement infrarouge pour assurer son refroidissement, est réalisable au moyen d'un échangeur thermique traversé aussi par l'air extrait de l'ensemble de soufflage et d'aspiration, cet air extrait contenant l'eau ou autre produit évaporé à évacuer.Such a device can therefore operate with low air temperatures, of the order of 110 to 130 ° C. Advantageously, the device comprises means which return the cooling air from the transmitters infrared of the aforementioned module and which then inject this air in the air heating boxes, without intake of external energy to heat the air. We will also note that a pre-heating of the fresh air, directed towards the module infrared radiation emitter to ensure its cooling, is achievable by means of an exchanger also crossed by the air extracted from the assembly blowing and suction, this extract air containing water or other evaporated product to drain.
Grâce à ces dispositions, le rendement thermique du dispositif (rendement de l'opération de transfert de chaleur de la source vers la feuille) est excellent. L'invention permet ainsi d'utiliser des émetteurs infrarouges de type électrique, avec un rendement global du dispositif qui est d'environ 75% à 80%, alors que les systèmes infrarouges actuels ne dépassent pas 30 ou 40% tandis que le rendement d'un transfert par flux d'air est d'environ 70%. Thanks to these provisions, the thermal efficiency of the device (yield of the transfer operation of heat from the source to the leaf) is excellent. The invention thus makes it possible to use transmitters electric type infrared, with overall efficiency of the device which is about 75% to 80%, while the current infrared systems do not exceed 30 or 40% while the efficiency of an air flow transfer is about 70%.
En conséquence directe de cet excellent rendement, l'invention permet de réduire de deux à quatre fois la longueur du dispositif, par rapport à une hotte classique, en permettant par exemple un passage d'une longueur de 9 mètres à une longueur de 3 mètres, ce qui donne des longueurs de feuilles libres réduites, très favorables aux machines rapides. Grâce à ce raccourcissement important, le dispositif objet de l'invention peut aussi être inséré sans difficulté dans des installations existantes.As a direct result of this excellent yield, the invention makes it possible to reduce from two to four times the length of the device, compared to a conventional hood, allowing for example a passage with a length of 9 meters to a length of 3 meters, which gives reduced free leaf lengths, very favorable for fast machines. Thanks to this important shortening, the device which is the subject of the invention can also be inserted without difficulty in existing installations.
L'invention sera de toute façon mieux comprise à l'aide de la description qui suit, en référence à l'unique figure du dessin annexé, qui représente de façon très schématique, en coupe longitudinale, un dispositif conforme à la présente invention.The invention will in any case be better understood at using the following description, with reference to the unique figure of the attached drawing, which very clearly represents schematic, in longitudinal section, a device according to the present invention.
Le dispositif représenté au dessin assure le traitement thermique, notamment le séchage, d'un matériau en feuille désigné par le repère 1, qui défile en continu dans le sens indiqué par la flèche F, soit de droite à gauche par référence à la figure. Le matériau en feuille 1 traverse ainsi longitudinalement un ensemble de soufflage et d'aspiration d'air, désigné globalement par le repère 2. Avant d'atteindre cet ensemble 2, le matériau en feuille 1 passe par un équipement de montée en température non représenté, situé en amont dudit ensemble 2 et ne faisant pas l'objet de la présente invention.The device shown in the drawing ensures the heat treatment, including drying, of a material in sheet designated by the reference 1, which scrolls continuously in the direction indicated by the arrow F, i.e. from right to left with reference to the figure. Sheet material 1 thus passes longitudinally through a blowing assembly and air intake, generally designated by the reference 2. Before reaching this set 2, the material sheet 1 goes through a temperature rise equipment not shown, located upstream of said assembly 2 and does not not the subject of the present invention.
L'ensemble 2 de soufflage et d'aspiration d'air comprend une partie supérieure 3, surmontant le matériau en feuille 1 à traiter, et une partie inférieure 4, située au-dessous de la trajectoire de ce matériau en feuille 1. Ces deux parties 3 et 4 en forme de caissons comportent, répartis sur leur longueur, des organes respectivement désignés par 5 et 6, qui assurent le soufflage et l'aspiration d'air, comme suggéré par les petites flèches f, de manière notamment à assurer la sustentation du matériau en feuille 1, dans sa traversée de l'ensemble 2. Blowing and air suction assembly 2 includes an upper part 3, surmounting the material in sheet 1 to be treated, and a lower part 4, located below the path of this sheet material 1. These two parts 3 and 4 in the form of boxes include, distributed over their length, of the organs respectively designated by 5 and 6, which provide blowing and air intake, as suggested by the small arrows f, so as in particular to ensure the levitation of the sheet material 1, in its crossing of the assembly 2.
Selon l'invention, un module de rayonnement infrarouge 7 est incorporé dans la partie amont de l'ensemble 2 de soufflage et d'aspiration d'air, à l'intérieur de cet ensemble 2. Le module 7 comprend ici, du côté de la partie supérieure 3 de l'ensemble 2, des émetteurs infrarouges 8 de type électrique. Ce module 7 est complété, du côté de la partie inférieure 4 de l'ensemble 2, par un réflecteur 9 situé en regard des émetteurs infrarouges 8. En ce qui concerne la position du module de rayonnement infrarouge 7, on notera que certains des organes de soufflage et d'aspiration d'air 5 et 6 peuvent se situer en amont de ce module 7, comme montré sur la figure.According to the invention, a radiation module infrared 7 is incorporated in the upstream part of the blowing and air suction assembly 2, at inside this set 2. Module 7 here includes, on the side of the upper part 3 of the assembly 2, infrared emitters 8 of electrical type. This module 7 is completed, on the side of the lower part 4 of the assembly 2, by a reflector 9 located opposite the infrared emitters 8. Regarding the position of the infrared radiation module 7, it will be noted that some blowing and air intake units 5 and 6 can be located upstream of this module 7, as shown on the face.
Le module de rayonnement infrarouge 7 comporte, pour le refroidissement de ses émetteurs infrarouges 8, une alimentation en air neuf 10 en provenance de l'extérieur. A sa sortie du module 7, l'air de refroidissement réchauffé est injecté, par des conduits de guidage appropriés 11, dans le caisson de soufflage d'air que constitue la partie supérieure 3 de l'ensemble 2, et cet air est aussi amené par un conduit 12 dans le caisson constitué par la partie inférieure 4.The infrared radiation module 7 comprises, for cooling its infrared emitters 8, a fresh air supply 10 from outside. On leaving module 7, the air from warmed cooling is injected through appropriate guide 11, in the air supply box that constitutes the upper part 3 of the assembly 2, and this air is also brought through a duct 12 into the box consisting of the lower part 4.
L'air neuf, provenant de l'extérieur, parcourt un échangeur thermique 13 avant de parvenir à l'alimentation en air 10 du module 7. L'échangeur 13 est aussi parcouru par l'air extrait, provenant directement de la partie supérieure 3 de l'ensemble 2 de soufflage d'aspiration, et indirectement (par un conduit 14) de la partie inférieure 4 de cet ensemble 2, cet air étant dirigé ensuite vers une évacuation.Fresh air, coming from outside, flows through a heat exchanger 13 before reaching supply in air 10 of the module 7. The exchanger 13 is also traversed by the extracted air, coming directly from the part upper 3 of the suction blowing assembly 2, and indirectly (via a conduit 14) from the bottom 4 of this assembly 2, this air then being directed towards a evacuation.
En cours de fonctionnement, le module de rayonnement infrarouge 7 assure le transfert thermique sur le matériau en feuille 1, à son entrée dans l'ensemble 2. L'air de refroidissement des émetteurs infrarouges 8, s'échappant du module 7, pénètre dans les caissons des parties 3 et 4. A partir de ces caissons, formant zones de mélange, l'air est dirigé vers le matériau en feuille 1 et repris par les organes 5, 6 de soufflage et d'aspiration, de manière à assurer d'une part la sustentation du matériau en feuille 1, et d'autre part le transfert de masse, c'est-à-dire l'entraínement de l'eau mise en évaporation, sur ledit matériau en feuille 1, par l'apport énergétique du rayonnement infrarouge issu du module 7.During operation, the infrared radiation 7 provides heat transfer to the sheet material 1, as it enters the assembly 2. The cooling air of the infrared emitters 8, escaping from module 7, enters the boxes of the parts 3 and 4. From these boxes, forming zones of mixing, the air is directed to the sheet material 1 and taken up by the blowing and suction organs 5, 6, so as to ensure on the one hand the sustenance of the sheet material 1, and on the other hand the transfer of mass, that is to say the entrainment of the water put evaporation, on said sheet material 1, by the contribution energy from infrared radiation from module 7.
L'air chaud extrait, contenant l'eau évaporée, traverse l'échangeur 13 qui réalise un préchauffage de l'air neuf dirigé vers le module de rayonnement infrarouge 7. L'évacuation de l'air extrait assure aussi l'extraction de l'eau évaporée, et le matériau en feuille 1 sort de l'ensemble 2 en étant séché.The hot air extracted, containing the evaporated water, passes through the exchanger 13 which preheats the fresh air directed to the infrared radiation module 7. The extraction of extracted air also ensures extraction evaporated water, and the sheet material 1 comes out of the whole 2 being dried.
Le dispositif, précédemment décrit, s'applique notamment aux domaines du papier, des films synthétiques et des produits textiles, en cours de fabrication ou de traitement. Ce dispositif peut aussi s'appliquer au traitement de produits en feuille métalliques, par exemple pour le séchage d'enduits déposés sur de tels produits métalliques.The device, previously described, applies especially in the fields of paper, synthetic films and textile products, during manufacture or treatment. This device can also be applied to processing of sheet metal products, for example for drying coatings deposited on such products metallic.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9802225A FR2775065B1 (en) | 1998-02-19 | 1998-02-19 | DEVICE FOR THE HEAT TREATMENT OF CONTINUOUSLY MOVING SHEET MATERIALS |
| FR9802225 | 1998-02-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0937956A1 true EP0937956A1 (en) | 1999-08-25 |
Family
ID=9523307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99420045A Withdrawn EP0937956A1 (en) | 1998-02-19 | 1999-02-18 | Apparatus for heat treatment of continuously moving webs |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0937956A1 (en) |
| FR (1) | FR2775065B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2166299A3 (en) * | 2008-09-22 | 2012-10-24 | Voith Patent GmbH | Web of material drying device |
| EP2166298A3 (en) * | 2008-09-22 | 2012-10-24 | Voith Patent GmbH | Web of material drying device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739546A (en) * | 2021-08-06 | 2021-12-03 | 安徽省天助纺织科技集团股份有限公司 | Circulation drying equipment is used in cotton textile processing |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2405813A (en) * | 1944-05-06 | 1946-08-13 | B F Sturtevant Co | Drier |
| GB1480076A (en) * | 1973-10-12 | 1977-07-20 | Buettner Schilde Haas Ag | Deflected-stream dryers for drying web material |
| US4336279A (en) * | 1978-07-04 | 1982-06-22 | Metzger Wesley A | Apparatus and process for drying and curing coated substrates |
| US4379435A (en) * | 1981-10-19 | 1983-04-12 | Northern Telecom Limited | Drying oven for indefinite length material |
| US4756091A (en) * | 1987-06-25 | 1988-07-12 | Herbert Van Denend | Hybrid high-velocity heated air/infra-red drying oven |
| WO1988007103A1 (en) * | 1987-03-11 | 1988-09-22 | Valmet Paper Machinery Inc. | Arrangement for drying a running web |
| WO1988009845A1 (en) * | 1987-06-04 | 1988-12-15 | Valmet Paper Machinery Inc. | Method in the drying of a paper web or equivalent |
| WO1989004890A1 (en) * | 1987-11-26 | 1989-06-01 | Valmet Oy | Method and device in on-machine coating-drying of a paper web or equivalent |
| FR2630532A1 (en) * | 1988-04-25 | 1989-10-27 | Valmet Paper Machinery Inc | CONTINUOUS DRYING METHOD AND DEVICE CONSISTING OF AN INFRARED GAS DRYER AND AN AIR-SUSPENDED BELT DRYER |
| DE4029488A1 (en) * | 1989-09-25 | 1991-04-04 | Valmet Paper Machinery Inc | Paper web contactless drying - uses thermal energy from recovered coolant air from infrared dryer for under side of floating dryer |
| WO1998034079A1 (en) * | 1997-02-05 | 1998-08-06 | Megtec Systems, Inc. | High speed infrared/convection dryer |
-
1998
- 1998-02-19 FR FR9802225A patent/FR2775065B1/en not_active Expired - Fee Related
-
1999
- 1999-02-18 EP EP99420045A patent/EP0937956A1/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2405813A (en) * | 1944-05-06 | 1946-08-13 | B F Sturtevant Co | Drier |
| GB1480076A (en) * | 1973-10-12 | 1977-07-20 | Buettner Schilde Haas Ag | Deflected-stream dryers for drying web material |
| US4336279A (en) * | 1978-07-04 | 1982-06-22 | Metzger Wesley A | Apparatus and process for drying and curing coated substrates |
| US4379435A (en) * | 1981-10-19 | 1983-04-12 | Northern Telecom Limited | Drying oven for indefinite length material |
| WO1988007103A1 (en) * | 1987-03-11 | 1988-09-22 | Valmet Paper Machinery Inc. | Arrangement for drying a running web |
| WO1988009845A1 (en) * | 1987-06-04 | 1988-12-15 | Valmet Paper Machinery Inc. | Method in the drying of a paper web or equivalent |
| US4756091A (en) * | 1987-06-25 | 1988-07-12 | Herbert Van Denend | Hybrid high-velocity heated air/infra-red drying oven |
| WO1989004890A1 (en) * | 1987-11-26 | 1989-06-01 | Valmet Oy | Method and device in on-machine coating-drying of a paper web or equivalent |
| FR2630532A1 (en) * | 1988-04-25 | 1989-10-27 | Valmet Paper Machinery Inc | CONTINUOUS DRYING METHOD AND DEVICE CONSISTING OF AN INFRARED GAS DRYER AND AN AIR-SUSPENDED BELT DRYER |
| DE4029488A1 (en) * | 1989-09-25 | 1991-04-04 | Valmet Paper Machinery Inc | Paper web contactless drying - uses thermal energy from recovered coolant air from infrared dryer for under side of floating dryer |
| WO1998034079A1 (en) * | 1997-02-05 | 1998-08-06 | Megtec Systems, Inc. | High speed infrared/convection dryer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2166299A3 (en) * | 2008-09-22 | 2012-10-24 | Voith Patent GmbH | Web of material drying device |
| EP2166298A3 (en) * | 2008-09-22 | 2012-10-24 | Voith Patent GmbH | Web of material drying device |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2775065A1 (en) | 1999-08-20 |
| FR2775065B1 (en) | 2000-05-26 |
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