EP0794013A1 - Installation for preparation and delivery of a coating composition to a paper coating head or the like - Google Patents
Installation for preparation and delivery of a coating composition to a paper coating head or the like Download PDFInfo
- Publication number
- EP0794013A1 EP0794013A1 EP97420032A EP97420032A EP0794013A1 EP 0794013 A1 EP0794013 A1 EP 0794013A1 EP 97420032 A EP97420032 A EP 97420032A EP 97420032 A EP97420032 A EP 97420032A EP 0794013 A1 EP0794013 A1 EP 0794013A1
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- EP
- European Patent Office
- Prior art keywords
- premixer
- tank
- composition
- coating
- installation according
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
- B05C11/101—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material responsive to weight of a container for liquid or other fluent material; responsive to level of liquid or other fluent material in a container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
- B05B12/1418—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet for supplying several liquids or other fluent materials in selected proportions to a single spray outlet
Definitions
- the invention relates to the field of the paper industry and more specifically to paper coating installations. It relates more precisely to the installation for preparing and dosing the composition intended to supply the coating head.
- coating sauce is made up of the mixing and mixing of different pigments, fillers and binders intended to give the paper special visual and tactile qualities.
- the preparation of this coating sauce is carried out in a mixing unit generally called a "coating kitchen".
- a mixing unit generally called a "coating kitchen”.
- Two main techniques are generally used to ensure the dosing and feeding of the coating head.
- the technique commonly known as "batch” is known, in which the various ingredients of the coating sauce, contained in specific dosing hoppers, are poured in selected quantities into a mixing and storage tank.
- the stirring and mixing operation is complete, the quantity of sauce produced is poured into the circuit connected to the coating head.
- the operation for preparing the sauce and its injection into the feeding circuit of the coating head are independent, and necessarily consecutive. It follows that the overall operation of the installation is discontinuous, which requires the presence of relatively expensive storage tanks.
- the problem which the invention therefore proposes to solve is to provide a sleeping kitchen allowing flexible operation concerning the feeding of the sleeping head, which delivers a quality sauce strictly constant over time, and which does not require special and high precision dosing means.
- the invention therefore relates to an installation for the preparation and supply of a coating composition to a coating head for paper or the like, comprising a plurality of hoppers, each intended to receive and deliver an ingredient of the composition.
- the installation according to the invention comprises means for simultaneously carrying out, on the one hand, the metering and mixing of the different ingredients to obtain the coating sauce, and on the other hand the continuous feeding of the head with the sauce thus prepared.
- the installation combines the advantages of precise and independent dosing with those of continuous feeding of the coating head without any interruption.
- the premixer comprises a composition level detector, for actuating the means for controlling the supply of ingredients.
- the triggering of the dosage results from the monitoring of the level in the premixer.
- the various dosing hoppers pour part of their content into the premixer.
- the premixer tray marries at its lower end a frustoconical shape in which the level detector and an agitator are arranged.
- the installation comprises a drain pump arranged on the circuit between the premixer and the reactor.
- a drain pump arranged on the circuit between the premixer and the reactor.
- the invention consists in carrying out a discontinuous dosage of the various ingredients making up the coating sauce, and at the same time ensuring a continuous supply of the coating head with this sauce.
- the reactor tank into which the mixture produced in the premixer is periodically poured comprises a high speed agitator to ensure the dispersion of the composition by shearing.
- the coating sauce is poured into a buffer tank directly connected to the pump located on the circuit in the direction of the coating head.
- the buffer capacity has a level detector of the composition for actuating the supply to the reactor vessel.
- the need for coating sauce corresponds to a low threshold in composition in its buffer capacity, which causes, when it is reached, the opening of a valve and the operation of the pump. drain located between the premixer and the reactor.
- the supply of the buffer capacity by the reactor tank is effected by means of an overflow.
- the volume of the buffer capacity is greater than the useful volume of the premixer tank.
- the circuit between the buffer capacity and the coating head comprises a sensor for actuating means for controlling the supply of ingredients to the premixer tank.
- the discontinuous metering corresponding to the supply of the premixer is triggered by flow or level thresholds observed downstream of the actual sleeping kitchen.
- the hoppers, the premixer tank, the reactor tank and the buffer tank also have means for supplying and washing water.
- a sleeping kitchen comprises a plurality of elementary tanks (not shown) containing ingredients necessary for the composition of the sleeping sauce.
- the various elements and organs composing the sleeping kitchen are intended to ensure the mixing and the production of a sufficient quantity for the supply of the circuit (C4) leading to the sleeping unit (5) proper.
- the various storage tanks are linked by all known means, to a plurality of dosing hoppers (T1-T5).
- T1-T5 dosing hoppers
- the number of hoppers shown is five, but it goes without saying that the principle of the invention applies to a much higher number of hoppers.
- Each of these dosing hoppers (T1-T5) is connected to a circuit (C1) opening into a characteristic premixer (2).
- Each hopper is equipped with a level sensor (D1) and a valve (V1-V5) allowing the supply of the premixer to be controlled.
- D1 level sensor
- V1-V5 valve
- Each of these hoppers is located at a height greater than that of the premixer, so that the flow in this premixer (2) is effected by gravity.
- the premixer (2) notably comprises stirring means (6) and a sensor (D2) capable of determining the quantity of liquid it contains.
- This premixer (2) is connected to a high capacity reactor (1), via a circuit (C2) on which are mounted an isolation valve (V6) and a pump (P1), for example of the volumetric type.
- This reactor (1) comprises means making it possible to ensure the dispersion of the coating sauce by shearing, by rotation at high speed (several thousand revolutions per minute), and this in order to ensure homogenization of the coating sauce.
- the circuit (C2) allows the introduction of the coating sauce not yet dispersed in the lower part of the reactor. This is equipped with a level detector (D3).
- the reactor (1) is associated with a buffer capacity (3) in which the coating sauce dispersed by the reactor (1) flows.
- this flow takes place via an overflow circuit (C3), connected to the upper part of the reactor (1).
- C3 overflow circuit
- This buffer capacity can be achieved by a tank itself or even by a simple diameter pipe making it possible to comply with the volume criterion set out above.
- This buffer capacity (3) is connected, via the circuit (C4) to the supply unit (5) of the coating head.
- the operation of the sleeping kitchen according to the invention is as follows.
- Figure 2 illustrates the operating phase during which the reactor (1) has just received a quantity of composition from the premixer (2), not yet dispersed.
- the valve (V6) has just closed and the stirring and shearing means (7) perform their dispersing action.
- the capacity (3) sees its level drop due to the continuous consumption of the sleeping head, via the circuit (C4).
- the low level in the premixer (2) detected by the sensor (D2) causes the valves (V1 to V5) to open for determined times allowing the flow of predetermined and calculated quantities to obtain the chosen dosage. .
- the premixer (2) is filled, while the capacity (3) is emptied.
- the filling time of the premixer must be less than the draining time of the capacity (3). During this second intermediate phase, the level in the reactor drops, which stops the overflow phenomenon.
- valves V1 to V5 are all closed, following the filling of the premixer, controlled by the sensor (D2).
- the valve (V6) is open and the pump (P1) is actuated to drain the premixer (2) in the reactor (1) via the circuit (C2). It follows that the level in the reactor (1) rises and that the overflow circuit (C3) is again traversed by sheared sauce which fills the capacity (3).
- the overflow circuit (C3) is again traversed by sheared sauce which fills the capacity (3).
- the coating kitchen according to the invention makes it possible to simultaneously ensure a discontinuous metering of the various ingredients of the coating sauce, with a continuous supply of the supply unit of the coating head. It follows that on the one hand, the operation of the latter is essentially continuous, which makes it possible to optimize the times of use, and that on the other hand, the means necessary for the dosage are relatively simple and inexpensive .
Abstract
Description
L'invention concerne le domaine de l'industrie papetière et plus précisément les installations de couchage du papier. Elle vise plus précisément l'installation de préparation et de dosage de la composition destinée à alimenter la tête de couchage.The invention relates to the field of the paper industry and more specifically to paper coating installations. It relates more precisely to the installation for preparing and dosing the composition intended to supply the coating head.
De manière connue, dans une installation de couchage, la tête de couchage est alimentée en une composition communément appelée "sauce de couchage". Cette sauce de couchage est constituée par le mélange et le mixage de différents pigments, charges et liants destinés à conférer au papier des qualités visuelles et de toucher particulières.In known manner, in a coating installation, the coating head is supplied with a composition commonly called "coating sauce". This coating sauce is made up of the mixing and mixing of different pigments, fillers and binders intended to give the paper special visual and tactile qualities.
La préparation de cette sauce de couchage est réalisée dans une unité de mélange généralement appelée "cuisine de couchage". Deux techniques principales différentes dans leur principe, sont généralement employées pour assurer le dosage et l'alimentation de la tête de couchage. Ainsi, on connaît la technique communément appelée "batch", dans laquelle les différents ingrédients de la sauce de couchage, contenus dans des trémies de dosage spécifiques, sont versées dans des quantités sélectionnées dans un bac de mélange et de stockage. Lorsque l'opération de brassage et de mélange est terminée, la quantité de sauce produite est déversée dans le circuit relié à la tête de couchage. Ainsi, l'opération de préparation de la sauce et son injection dans le circuit d'alimentation de la tête de couchage sont indépendantes, et forcément consécutives. Il s'ensuit que le fonctionnement global de l'installation est discontinu, ce qui nécessite la présence de réservoirs de stockage relativement coûteux.The preparation of this coating sauce is carried out in a mixing unit generally called a "coating kitchen". Two main techniques, different in principle, are generally used to ensure the dosing and feeding of the coating head. Thus, the technique commonly known as "batch" is known, in which the various ingredients of the coating sauce, contained in specific dosing hoppers, are poured in selected quantities into a mixing and storage tank. When the stirring and mixing operation is complete, the quantity of sauce produced is poured into the circuit connected to the coating head. Thus, the operation for preparing the sauce and its injection into the feeding circuit of the coating head are independent, and necessarily consecutive. It follows that the overall operation of the installation is discontinuous, which requires the presence of relatively expensive storage tanks.
Par ailleurs, on connaît également, des installations cherchant à pallier cet inconvénient, fonctionnant en continu. Ainsi, dans cette solution, les différentes trémies de dosage déversent les ingrédients de couchage directement dans le circuit alimentant la tête de couchage, en subissant un mixage. Bien qu'augmentant la rapidité de mise en action de l'installation, cette solution nécessite des moyens de dosage extrêmement précis permettant de délivrer la quantité exacte de pigments ou liants nécessaires pour la qualité de sauce de couchage retenue. Ces moyens de dosage précis augmentent le coût global d'une installation.Furthermore, there are also known installations seeking to overcome this drawback, operating continuously. Thus, in this solution, the various dosing hoppers pour the coating ingredients directly into the circuit supplying the coating head, undergoing mixing. Although increasing the speed of actuation of the installation, this solution requires extremely precise metering means making it possible to deliver the exact quantity of pigments or binders necessary for the quality of coating coating used. These means of precise dosing increases the overall cost of an installation.
Le problème que se propose donc de résoudre l'invention est de fournir une cuisine de couchage permettant un fonctionnement souple concernant l'alimentation de la tête de couchage, qui délivre une sauce de qualité rigoureusement constante dans le temps, et qui ne nécessite pas des moyens de dosage particuliers et de grande précision.The problem which the invention therefore proposes to solve is to provide a sleeping kitchen allowing flexible operation concerning the feeding of the sleeping head, which delivers a quality sauce strictly constant over time, and which does not require special and high precision dosing means.
L'invention concerne donc une installation pour la préparation et l'alimentation d'une composition de couchage à une tête de couchage pour le papier ou analogue, comprenant une pluralité de trémies, destinées chacune à recevoir et à délivrer un ingrédient de la composition.The invention therefore relates to an installation for the preparation and supply of a coating composition to a coating head for paper or the like, comprising a plurality of hoppers, each intended to receive and deliver an ingredient of the composition.
Cette installation se caractérise en ce qu'elle comporte :
- un bac prémélangeur alimenté par les différentes trémies, destiné à mélanger et à homogénéiser la composition formée ;
- un bac-réacteur alimenté par le bac prémélangeur, comportant des moyens de cisaillement de la composition ;
- une capacité-tampon, directement et en permanence alimentée par le bac-réacteur, reliée à la tête de couchage ;
- des moyens pour détecter un besoin en composition de la tête de couchage;
- et des moyens de commande reliés auxdits moyens de détection pour alimenter le bac-prémélangeur en ingrédients issus des trémies.
- a premixer tank fed by the various hoppers, intended for mixing and homogenizing the composition formed;
- a reactor-tank fed by the premixer tank, comprising means for shearing the composition;
- a buffer tank, directly and permanently supplied by the reactor vessel, connected to the coating head;
- means for detecting a need for composition of the coating head;
- and control means connected to said detection means for supplying the premixer with ingredients from the hoppers.
Autrement dit, l'installation conforme à l'invention comporte des moyens pour réaliser simultanément, d'une part, le dosage et le mélange des différents ingrédients pour obtenir la sauce de couchage, et d'autre part l'alimentation continue de la tête de couchage avec la sauce ainsi préparée. En d'autres termes, l'installation combine les avantages d'un dosage précis et indépendant avec ceux d'une alimentation continue de la tête de couchage et sans aucune interruption.In other words, the installation according to the invention comprises means for simultaneously carrying out, on the one hand, the metering and mixing of the different ingredients to obtain the coating sauce, and on the other hand the continuous feeding of the head with the sauce thus prepared. In other words, the installation combines the advantages of precise and independent dosing with those of continuous feeding of the coating head without any interruption.
Dans une première variante, le prémélangeur comporte un détecteur de niveau de la composition, pour actionner les moyens de commande de l'alimentation en ingrédients.In a first variant, the premixer comprises a composition level detector, for actuating the means for controlling the supply of ingredients.
Autrement dit, selon une première stratégie de régulation, le déclenchement du dosage résulte de la surveillance du niveau dans le prémélangeur. Ainsi, lorsque le niveau dans ce prémélangeur atteint un seuil bas, les différentes trémies de dosage déversent une partie de leur contenu dans le prémélangeur.In other words, according to a first regulation strategy, the triggering of the dosage results from the monitoring of the level in the premixer. Thus, when the level in this premixer reaches a low threshold, the various dosing hoppers pour part of their content into the premixer.
Dans une géométrie avantageuse, le bac-prémélangeur épouse à son extrémité inférieure une forme tronconique dans laquelle est disposé le détecteur de niveau et un agitateur.In an advantageous geometry, the premixer tray marries at its lower end a frustoconical shape in which the level detector and an agitator are arranged.
Avantageusement, l'installation comporte une pompe de vidange disposée sur le circuit entre le prémélangeur et le réacteur. De la sorte, la vidange du prémélangeur est assurée sous un débit régulier, et ce quelle que soit la viscosité du liquide. Les temps d'écoulement sont donc réguliers.Advantageously, the installation comprises a drain pump arranged on the circuit between the premixer and the reactor. In this way, the emptying of the premixer is ensured at a regular rate, regardless of the viscosity of the liquid. The flow times are therefore regular.
Comme déjà dit, l'invention consiste à réaliser un dosage discontinu des différents ingrédients composant la sauce de couchage, et assurer dans le même temps une alimentation continue de la tête de couchage en cette sauce. Ainsi dans une forme de réalisation avantageuse, le bac réacteur dans lequel est déversé périodiquement le mélange réalisé dans le prémélangeur, comporte un agitateur à grande vitesse pour assurer la dispersion de la composition par cisaillement.As already said, the invention consists in carrying out a discontinuous dosage of the various ingredients making up the coating sauce, and at the same time ensuring a continuous supply of the coating head with this sauce. Thus, in an advantageous embodiment, the reactor tank into which the mixture produced in the premixer is periodically poured, comprises a high speed agitator to ensure the dispersion of the composition by shearing.
Comme déjà dit, après dispersion, la sauce de couchage est déversée dans une capacité-tampon directement reliée à la pompe située sur le circuit en direction de la tête de couchage.As already said, after dispersion, the coating sauce is poured into a buffer tank directly connected to the pump located on the circuit in the direction of the coating head.
Avantageusement, la capacité-tampon présente un détecteur de niveau de la composition pour actionner l'alimentation du bac-réacteur. Ainsi, dans cette variante de réalisation, le besoin en sauce de couchage correspond à un seuil bas en composition dans sa capacité-tampon, qui provoque, lorsqu'il est atteint, l'ouverture d'une vanne et le fonctionnement de la pompe de vidange situées entre le prémélangeur et le réacteur.Advantageously, the buffer capacity has a level detector of the composition for actuating the supply to the reactor vessel. Thus, in this alternative embodiment, the need for coating sauce corresponds to a low threshold in composition in its buffer capacity, which causes, when it is reached, the opening of a valve and the operation of the pump. drain located between the premixer and the reactor.
Avantageusement en pratique, l'alimentation de la capacité-tampon par le bac réacteur s'effectue au moyen d'une surverse.Advantageously in practice, the supply of the buffer capacity by the reactor tank is effected by means of an overflow.
Pour assurer, conformément aux problèmes posés, une continuité de l'alimentation compatible avec un dosage discontinu de la sauce de couchage, le volume de la capacité-tampon est supérieur au volume utile du bac prémélangeur.To ensure, in accordance with the problems posed, a continuity of supply compatible with a discontinuous dosing of the coating sauce, the volume of the buffer capacity is greater than the useful volume of the premixer tank.
Dans une autre variante de réalisation, le circuit compris entre la capacité-tampon et la tête de couchage comprend un capteur pour actionner des moyens de commande de l'alimentation des ingrédients dans le bac prémélangeur.In another alternative embodiment, the circuit between the buffer capacity and the coating head comprises a sensor for actuating means for controlling the supply of ingredients to the premixer tank.
Autrement dit, dans cette autre architecture correspondant à une stratégie de commande différente, le dosage discontinu correspondant à l'alimentation du prémélangeur est déclenché par des seuils de débit ou de niveau observés en aval de la cuisine de couchage proprement dite.In other words, in this other architecture corresponding to a different control strategy, the discontinuous metering corresponding to the supply of the premixer is triggered by flow or level thresholds observed downstream of the actual sleeping kitchen.
Dans une forme de réalisation particulière, les trémies, le bac-prémélangeur, le bac-réacteur et la capacité-tampon présentent en outre des moyens d'alimentation et de lavage en eau.In a particular embodiment, the hoppers, the premixer tank, the reactor tank and the buffer tank also have means for supplying and washing water.
La manière de réaliser l'invention, ainsi que les avantages qui en découlent, ressortiront bien de la description du mode de réalisation qui suit, à l'appui des figures annexées, dans lesquelles :
- La figure 1 est un synoptique simplifié général montrant les différents éléments composant une cuisine de couchage conforme à l'invention.
- La figure 2 est un diagramme montrant une première phase de fonctionnement de la cuisine de couchage, dans laquelle la capacité-tampon est remplie.
- La figure 3 est le même diagramme, dans une phase ultérieure pendant laquelle le niveau dans la capacité décroît tandis que le pré-mélangeur se remplit.
- La figure 4 est le même diagramme illustrant la phase suivant la vidange du prémélangeur.
- Figure 1 is a general simplified block diagram showing the different elements making up a sleeping kitchen according to the invention.
- Figure 2 is a diagram showing a first operating phase of the sleeping kitchen, in which the buffer capacity is filled.
- FIG. 3 is the same diagram, in a later phase during which the level in the capacity decreases while the premixer is filling.
- FIG. 4 is the same diagram illustrating the phase following the emptying of the premixer.
De manière connue, une cuisine de couchage comprend une pluralité de réservoirs élémentaires (non représentés) contenant des ingrédients nécessaires à la composition de la sauce de couchage. Les différents éléments et organes composant la cuisine de couchage sont destinés à assurer le mélange et la production d'une quantité suffisante pour l'alimentation du circuit (C4) menant à l'unité de couchage (5) proprement dite.In known manner, a sleeping kitchen comprises a plurality of elementary tanks (not shown) containing ingredients necessary for the composition of the sleeping sauce. The various elements and organs composing the sleeping kitchen are intended to ensure the mixing and the production of a sufficient quantity for the supply of the circuit (C4) leading to the sleeping unit (5) proper.
Conformément à l'invention, les différents réservoirs de stockage sont liés par tous moyens connus, à une pluralité de trémies de dosage (T1-T5). Dans un but de clarté des dessins, le nombre de trémies représentées est de cinq mais il va sans dire que le principe de l'invention s'applique à un nombre de trémies beaucoup plus élevé. Chacune de ces trémies de dosage (T1-T5) est reliée à un circuit (C1) débouchant dans un prémélangeur caractéristique (2). Chaque trémie est équipée d'un capteur de niveau (D1) et d'une vanne (V1-V5) permettant de commander l'alimentation du prémélangeur. Chacune de ces trémies est située à une hauteur supérieure à celle du prémélangeur, de manière à ce que l'écoulement, dans ce prémélangeur (2) s'effectue par gravité.According to the invention, the various storage tanks are linked by all known means, to a plurality of dosing hoppers (T1-T5). For the sake of clarity of the drawings, the number of hoppers shown is five, but it goes without saying that the principle of the invention applies to a much higher number of hoppers. Each of these dosing hoppers (T1-T5) is connected to a circuit (C1) opening into a characteristic premixer (2). Each hopper is equipped with a level sensor (D1) and a valve (V1-V5) allowing the supply of the premixer to be controlled. Each of these hoppers is located at a height greater than that of the premixer, so that the flow in this premixer (2) is effected by gravity.
Le prémélangeur (2) comprend notamment des moyens d'agitation (6) et un capteur (D2) apte à déterminer la quantité de liquide qu'il contient.The premixer (2) notably comprises stirring means (6) and a sensor (D2) capable of determining the quantity of liquid it contains.
Ce prémélangeur (2) est relié à un réacteur (1) de forte capacité, via un circuit (C2) sur lequel sont montées une vanne d'isolation (V6) et une pompe (P1) par exemple du type volumétrique. Ce réacteur (1) comporte des moyens permettant d'assurer la dispersion de la sauce de couchage par cisaillement, par rotation à haute vitesse (plusieurs milliers de tours par minute), et ce pour assurer une homogénéisation de la sauce de couchage. Le circuit (C2) permet l'introduction de la sauce de couchage non encore dispersée dans la partie basse du réacteur. Celui-ci est équipé d'un détecteur de niveau (D3).This premixer (2) is connected to a high capacity reactor (1), via a circuit (C2) on which are mounted an isolation valve (V6) and a pump (P1), for example of the volumetric type. This reactor (1) comprises means making it possible to ensure the dispersion of the coating sauce by shearing, by rotation at high speed (several thousand revolutions per minute), and this in order to ensure homogenization of the coating sauce. The circuit (C2) allows the introduction of the coating sauce not yet dispersed in the lower part of the reactor. This is equipped with a level detector (D3).
Conformément à une caractéristique essentielle de l'invention, le réacteur (1) est associé à une capacité-tampon (3) dans laquelle s'écoule la sauce de couchage dispersée par le réacteur (1). Dans une forme préférée de réalisation, cet écoulement s'effectue par un circuit (C3) de surverse, relié à la partie haute du réacteur (1). Conformément à une caractéristique primordiale de l'invention, il importe que le volume de cette capacité-tampon (3) soit supérieur au volume utile du prémélangeur (2), et ce pour assurer une alimentation continue de la tête de couchage (5) pendant la phase de dosage par remplissage du prémélangeur (2). Cette capacité-tampon peut être réalisée par un bac proprement dit ou bien encore par une simple canalisation de diamètre permettant de respecter le critère de volume énoncé ci-avant.In accordance with an essential characteristic of the invention, the reactor (1) is associated with a buffer capacity (3) in which the coating sauce dispersed by the reactor (1) flows. In a preferred embodiment, this flow takes place via an overflow circuit (C3), connected to the upper part of the reactor (1). In accordance with a fundamental characteristic of the invention, it is important that the volume of this buffer capacity (3) is greater than the useful volume of the premixer (2), and this in order to ensure a continuous supply of the coating head (5) during the dosing phase by filling the premixer (2). This buffer capacity can be achieved by a tank itself or even by a simple diameter pipe making it possible to comply with the volume criterion set out above.
Cette capacité-tampon (3) est reliée, via le circuit (C4) à l'unité d'alimentation (5) de la tête de couchage. Une vanne (V7), disposée sur ce circuit (C4), en amont de la pompe de transfert (4) permet l'isolement de la cuisine de couchage vis à vis de l'unité d'alimentation de la tête de couchage (5).This buffer capacity (3) is connected, via the circuit (C4) to the supply unit (5) of the coating head. A valve (V7), arranged on this circuit (C4), upstream of the transfer pump (4) allows the isolation of the sleeping kitchen from the feeding unit of the sleeping head (5 ).
Le fonctionnement de la cuisine de couchage conformément à l'invention est le suivant.The operation of the sleeping kitchen according to the invention is as follows.
Ainsi, la figure 2 illustre la phase du fonctionnement pendant laquelle le réacteur (1) vient de recevoir une quantité de composition issue du prémélangeur (2), non encore dispersée. A ce moment, la vanne (V6) vient de se refermer et les moyens d'agitation et de cisaillement (7) effectuent leur action de dispersion. La zone supérieure du réacteur, où se localise la composition de couchage déjà cisaillée, se déverse via le circuit (C3) dans la capacité-tampon (3).Thus, Figure 2 illustrates the operating phase during which the reactor (1) has just received a quantity of composition from the premixer (2), not yet dispersed. At this time, the valve (V6) has just closed and the stirring and shearing means (7) perform their dispersing action. The upper zone of the reactor, where the already sheared coating composition is located, flows via the circuit (C3) into the buffer tank (3).
Dans une seconde phase de fonctionnement de la cuisine de couchage illustrée à la figure 3, la capacité (3) voit son niveau baisser de par la consommation continue de la tête de couchage, via le circuit (C4). Parallèlement et simultanément, le niveau bas dans le prémélangeur (2), détecté par le capteur (D2) provoque l'ouverture des vannes (V1 à V5) pendant des temps déterminés permettant l'écoulement de quantités prédéterminées et calculées pour obtenir le dosage choisi. Ainsi donc, le prémélangeur (2) se remplit, tandis que la capacité (3) se vide.In a second operating phase of the sleeping kitchen illustrated in FIG. 3, the capacity (3) sees its level drop due to the continuous consumption of the sleeping head, via the circuit (C4). At the same time and simultaneously, the low level in the premixer (2), detected by the sensor (D2) causes the valves (V1 to V5) to open for determined times allowing the flow of predetermined and calculated quantities to obtain the chosen dosage. . Thus, the premixer (2) is filled, while the capacity (3) is emptied.
Conformément à une caractéristique essentielle de l'invention, le temps de remplissage du prémélangeur doit être inférieur au temps de vidange de la capacité (3). Durant cette deuxième phase intermédiaire, le niveau dans le réacteur baisse, ce qui stoppe le phénomène de surverse.According to an essential characteristic of the invention, the filling time of the premixer must be less than the draining time of the capacity (3). During this second intermediate phase, the level in the reactor drops, which stops the overflow phenomenon.
Dans la troisième phase de fonctionnement de la cuisine de couchage, illustrée à la figure 4, les vannes V1 à V5 sont toutes refermées, consécutivement au remplissage du prémélangeur, contrôlées par le capteur (D2). Après ces fermetures, lorsque le niveau dans la capacité (3) atteint un seuil bas détecté par le capteur (D4), la vanne (V6) est ouverte et la pompe (P1) est actionnée pour assurer la vidange du prémélangeur (2) dans le réacteur (1) via le circuit (C2). Il s'ensuit que le niveau dans le réacteur (1) remonte et que le circuit de surverse (C3) est à nouveau parcouru par de la sauce cisaillée qui emplit la capacité (3). On se retrouve alors dans la phase de fonctionnement correspondante à la figure 2.In the third operating phase of the sleeping kitchen, illustrated in FIG. 4, the valves V1 to V5 are all closed, following the filling of the premixer, controlled by the sensor (D2). After these closings, when the level in the capacity (3) reaches a low threshold detected by the sensor (D4), the valve (V6) is open and the pump (P1) is actuated to drain the premixer (2) in the reactor (1) via the circuit (C2). It follows that the level in the reactor (1) rises and that the overflow circuit (C3) is again traversed by sheared sauce which fills the capacity (3). We then find ourselves in the operating phase corresponding to FIG. 2.
Bien entendu l'invention ne se limite pas à cette forme de réalisation décrite mais couvre également d'autres variantes non décrites en détail dans lesquelles l'enchaînement des différentes phases de fonctionnement est, par exemple, assuré par un capteur (D5) situé sur le circuit menant à l'unité d'alimentation de la tête de couchage (5).Of course the invention is not limited to this described embodiment but also covers other variants not described in detail in which the sequence of the different operating phases is, for example, provided by a sensor (D5) located on the circuit leading to the coating head supply unit (5).
Il ressort de ce qui précède que la cuisine de couchage conforme à l'invention permet d'assurer simultanément un dosage discontinu des différents ingrédients de la sauce de couchage, avec une alimentation continue de l'unité d'alimentation de la tête de couchage. Il s'ensuit que d'une part, le fonctionnement de cette dernière est essentiellement continu, ce qui permet d'en optimiser les temps d'utilisation, et que d'autre part, les moyens nécessaires au dosage sont relativement simples et peu onéreux.It emerges from the above that the coating kitchen according to the invention makes it possible to simultaneously ensure a discontinuous metering of the various ingredients of the coating sauce, with a continuous supply of the supply unit of the coating head. It follows that on the one hand, the operation of the latter is essentially continuous, which makes it possible to optimize the times of use, and that on the other hand, the means necessary for the dosage are relatively simple and inexpensive .
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9602993 | 1996-03-05 | ||
FR9602993A FR2745828B1 (en) | 1996-03-05 | 1996-03-05 | PLANT FOR THE PREPARATION AND SUPPLY OF A COATING COMPOSITION TO A COATING HEAD FOR PAPER OR THE LIKE |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0794013A1 true EP0794013A1 (en) | 1997-09-10 |
Family
ID=9490027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97420032A Ceased EP0794013A1 (en) | 1996-03-05 | 1997-02-27 | Installation for preparation and delivery of a coating composition to a paper coating head or the like |
Country Status (3)
Country | Link |
---|---|
US (1) | US5935332A (en) |
EP (1) | EP0794013A1 (en) |
FR (1) | FR2745828B1 (en) |
Cited By (2)
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EP0960980A1 (en) * | 1998-05-25 | 1999-12-01 | Valmet-Raisio Oy | Method and arrangement for feeding a web treating agent to a paper or board web processing apparatus |
CN106619582A (en) * | 2017-02-21 | 2017-05-10 | 北京信义惠达机电设备有限公司 | Gel plaster production system |
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US20030075294A1 (en) * | 2001-07-30 | 2003-04-24 | Winkle John Van | Day tank doser |
TW590795B (en) * | 2002-04-17 | 2004-06-11 | Rohm & Haas | An automated system and process for the preparation of a high viscosity fluid formulation |
CN1332741C (en) * | 2002-07-19 | 2007-08-22 | 动力系统有限公司 | Method and apparatus for blending process materials |
JP2004069498A (en) * | 2002-08-06 | 2004-03-04 | Canon Inc | Liquid conveying device and method |
FI114033B (en) * | 2002-10-17 | 2004-07-30 | Metso Paper Inc | Method and system for coating production |
FI114032B (en) * | 2002-10-17 | 2004-07-30 | Metso Paper Inc | Apparatus and method for feeding treatment means for a fiber web treatment device |
US6796702B2 (en) * | 2002-11-26 | 2004-09-28 | The Boeing Company | Automated sol-gel mixer |
US11319944B2 (en) | 2003-10-30 | 2022-05-03 | Deka Products Limited Partnership | Disposable interconnected pump cassettes having first and second pump chambers with valved inlet and outlet connections |
US7354190B2 (en) * | 2003-10-30 | 2008-04-08 | Deka Products Limited Partnership | Two-stage mixing system, apparatus, and method |
US7591904B2 (en) * | 2004-09-22 | 2009-09-22 | Fueukawa Electric North America, Inc. | System and method for manufacturing color-coated optical fiber |
US8047702B1 (en) * | 2005-06-06 | 2011-11-01 | Lopresti William J | Continuous high shear mixing process |
US7766538B2 (en) * | 2005-09-22 | 2010-08-03 | Assembled Products Corporation | System for blending liquids in selected ratios |
FR2891847B1 (en) * | 2005-10-11 | 2007-11-30 | Abb Process Ind Soc Par Action | INSTALLATION FOR PREPARING A SLEEPING COMPOSITION |
US7637086B2 (en) | 2006-11-29 | 2009-12-29 | J-Lok Co. | System and method for producing resin cartridges |
US7698021B2 (en) * | 2007-06-01 | 2010-04-13 | Microblend Technologies, Inc. | Method and apparatus for producing paint |
NZ741377A (en) | 2015-10-09 | 2022-02-25 | Deka Products Lp | Fluid pumping and bioreactor system |
CN107303547A (en) * | 2016-04-19 | 2017-10-31 | 无锡格莱生物技术有限公司 | Improved biological deodorant sprinkling system |
CN107304087A (en) * | 2016-04-19 | 2017-10-31 | 无锡格莱生物技术有限公司 | Deodorization spent shower water handles integrated system |
US11299705B2 (en) | 2016-11-07 | 2022-04-12 | Deka Products Limited Partnership | System and method for creating tissue |
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- 1997-02-28 US US08/808,602 patent/US5935332A/en not_active Expired - Fee Related
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FR2029384A1 (en) * | 1969-01-27 | 1970-10-23 | Ferro Procedes | |
US4121535A (en) * | 1977-03-16 | 1978-10-24 | Inta-Rota, Incorporated | Hot melt pumping apparatus |
US4457258A (en) * | 1983-01-04 | 1984-07-03 | Cocks Eric H | Marking apparatus for paints and inks |
FR2647461A1 (en) * | 1989-05-25 | 1990-11-30 | Arvor Kaolins | Process for the treatment of materials such as pigments of mineral origin with a view to dispersing them in water, and machine for carrying out the process |
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EP0960980A1 (en) * | 1998-05-25 | 1999-12-01 | Valmet-Raisio Oy | Method and arrangement for feeding a web treating agent to a paper or board web processing apparatus |
CN106619582A (en) * | 2017-02-21 | 2017-05-10 | 北京信义惠达机电设备有限公司 | Gel plaster production system |
Also Published As
Publication number | Publication date |
---|---|
FR2745828A1 (en) | 1997-09-12 |
US5935332A (en) | 1999-08-10 |
FR2745828B1 (en) | 1998-04-10 |
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