EP0917906B1 - Process and apparatus for the dissolution of a solid product - Google Patents

Process and apparatus for the dissolution of a solid product Download PDF

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Publication number
EP0917906B1
EP0917906B1 EP97401506A EP97401506A EP0917906B1 EP 0917906 B1 EP0917906 B1 EP 0917906B1 EP 97401506 A EP97401506 A EP 97401506A EP 97401506 A EP97401506 A EP 97401506A EP 0917906 B1 EP0917906 B1 EP 0917906B1
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EP
European Patent Office
Prior art keywords
vessel
screw
detergent
bag
weighing device
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.)
Expired - Lifetime
Application number
EP97401506A
Other languages
German (de)
French (fr)
Other versions
EP0917906A1 (en
Inventor
Didier Dombar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ecolab SNC
Original Assignee
Henkel Ecolab SNC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Henkel Ecolab SNC filed Critical Henkel Ecolab SNC
Priority to EP97401506A priority Critical patent/EP0917906B1/en
Priority to PT97401506T priority patent/PT917906E/en
Priority to DE69706425T priority patent/DE69706425T2/en
Priority to AT97401506T priority patent/ATE204786T1/en
Priority to DK97401506T priority patent/DK0917906T3/en
Priority to ES97401506T priority patent/ES2159821T3/en
Publication of EP0917906A1 publication Critical patent/EP0917906A1/en
Application granted granted Critical
Publication of EP0917906B1 publication Critical patent/EP0917906B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00—Dissolving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/714—Feed mechanisms for feeding predetermined amounts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71775—Feed mechanisms characterised by the means for feeding the components to the mixer using helical screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/881—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise by weighing, e.g. with automatic discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms

Definitions

  • the present invention relates to methods and devices for dissolution of a solid product in liquid. It specifically targets the dissolution of products in the finely divided state, in powder or granular form, whose dimensions are included for at least 75% by weight between 0.1 and 1 mm and, especially, the dissolution of detergent powders hygroscopic, as used in laundry facilities industrial.
  • the invention provides a method for dissolving a quantity solid detergent product in a finely divided state, shaking it with a given amount of liquid, which is very precise, which automates easily and which, above all, is very safe for the personnel of the laundry, avoiding it coming into contact with the product powdery hygroscopic.
  • Claim 2 indicates a simple method for disposing of permanence of a solution reserve.
  • Claim 3 allows to simply monitor that the process is proceeds normally, while claim 4 presents the very large advantage of preventing any heating of detergent powders hygroscopic caused by too rapid rotation of the screw. Moreover, this relatively slow rotation gives very good homogenization.
  • the invention also relates to a device for dissolving a product. solid as defined in claim 5.
  • the conveyor screw has a larger pitch on the outlet end side than the side of the inlet end. It is also better for this purpose than the edge free of the screw is notched.
  • the device also includes a conduit opening into the tank and mounted without weighing on the weighing device.
  • This conduit allows to send liquid, in particular water, into the tank in a quantity given by opening and then closing a valve mounted on the conduit.
  • the device may also include an agitator of the contents of the tank.
  • the bag holding means comprise a closed cylinder, vertical axis, receiving the end of the bag containing detergent powder.
  • the diameter of the cylinder is greater than the diameter of the end of the bag comprising the opening when the bag is closed by a lace, but less than the diameter of the opening of the bag when, the lace being unlaced, the bag is open. You can unlace the lace through the opening provided by a shutter capable of being opened temporarily and provided for in the side face of the cylinder.
  • the device comprises a mixing tank 1, which rests on three strain gauges 2 arranged in a distributed manner on the periphery of the bottom of tank 1 and forming weighing device, and a conveyor screw 3 endless, which feeds the tank 1 in powder.
  • Screw 3 with M1 motor has a closed cylindrical sheath 4. The free edge of the screw is notched.
  • the step of the screw 3 is larger on the outlet side than the product entry side from a bag 5.
  • the powder bag 5, suspended from a hoist 6, is arranged with its opening facing downwards in a cylinder fitted with a flap 7 which can be opened.
  • the cylinder communicates with a funnel 8 whose neck 9 communicates with the inlet end 10 of the conveyor screw 3.
  • the outlet end 11 of the screw opens at the top of the tank 1 in look of an opening 12 formed in the upper part of the tank, the end 11 not being in contact with the edge of the opening 12.
  • the conveyor screw 3 does not weigh on the tank 1.
  • a water supply duct 14 connects, via a valve 15 for controlling the tank 1, without however weighing on the tank 1, and opens at the bottom of the tank 1.
  • a conduit 16 places the tank 1 in communication with a dosing which feeds a washing device (not shown) via a pump P and a valve 17.
  • the duct 16 is arranged so as not to not weigh on the tank 1.
  • a control device 19 is connected, via several electrical conductors, respectively to the strain gauges 2, to the valve 15, to the drive motor M1 intended to drive the screw 3 conveyor, to valve 17, to pump P and to a motor M2 of an agitator of the contents of tank 1.
  • This control device 19 controls the opening or closing of valve 15, starting and stopping the motor M1 according to the signals emitted by the level sensor and by the strain gauges 2 and received by the control device 19.
  • the control 19 When the signal supplied by the strain gauges 2 to the device 19 which represents the weight of the tank indicates that the weight of the tank became below a first prescribed value, the control 19 operates the motor M1 to supply powder to the tank 1. Once the weight of tank 1 has reached a second prescribed value greater than the first prescribed value mentioned above, the control device, informed by the signal from the gauges 2 of constraints, stops the motor M1 and opens the valve 15 until reaching a third prescribed value where it closes valve 15.
  • the weight measurement signal of the tank 1 provided by the strain gauges 2 is much more reliable than in prior art devices and an accurate dosage of the mixture can be obtained by the control device 19.
  • the powder feed takes place so well uniform and continuous, without air entering it.
  • the inertia of the screw between the moment when the engine M1 is stopped by the control device 19 and the the moment the powder stops falling into the container 1 is much more weak than in the devices of the prior art.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Accessories For Mixers (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Refuse Collection And Transfer (AREA)
  • Processing Of Solid Wastes (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

To dissolve a given volume of a solid detergent by stirring in a given volume of liquid, the solid detergent is passed to a vessel with an agitator and is weighed. It uses a closed screw conveyor for the transport to spread the detergent in the vessel but without being weighed. The set volume of liquid is passed into the vessel by a feed line which avoids the weighing unit. The weighed measure is less than a first level, and the product is delivered by the screw into the vessel until a second weight level is achieved, and the detergent delivery is stopped. The liquid is fed into the vessel until a third weight level is achieved, and the water feed is stopped. A system compares in real time the delivery of the detergent and/or the water for a given time span, and an alarm is generated if the real time breaches the nominal time. The screw conveyor unit is rotated at a speed of ≤ 30 rpm. An Independent claim is included for an apparatus with a vessel (1) mounted on to a weighing unit (2). The detergent is fed by a screw (3) in a closed cylinder (4), where its outlet is at the upper part of the vessel (1) without the conveyor being weighed (2). The detergent bag (5) is opened (7,8) towards the entry into the conveyor screw (3). Preferred Features: The conveyor screw (3) pitch is larger at the outlet than at the entry. The free edge of the conveyor screw (3) is notched. A feed line (14) opens into the vessel (1) without being weighed. The bottom of the detergent bag (5) has a shutter (7) which can be opened.

Description

La présente invention se rapporte aux procédés et dispositifs de dissolution d'un produit solide dans du liquide. Elle vise tout particulièrement la dissolution de produits à l'état finement divisé, en poudre ou en granulé, dont les dimensions sont comprises pour au moins 75 % en poids entre 0,1 et 1 mm et, tout spécialement, la dissolution de poudres détergentes hygroscopiques, comme on en utilise dans les installations de blanchisserie industrielle.The present invention relates to methods and devices for dissolution of a solid product in liquid. It specifically targets the dissolution of products in the finely divided state, in powder or granular form, whose dimensions are included for at least 75% by weight between 0.1 and 1 mm and, especially, the dissolution of detergent powders hygroscopic, as used in laundry facilities industrial.

L'invention propose un procédé de dissolution d'une quantité prescrite de produit détergent solide à l'état finement divisé, en l'agitant avec une quantité donnée de liquide, qui est très précis, qui s'automatise facilement et qui, surtout, est d'une très grande sécurité pour le personnel de la blanchisserie, en lui évitant de venir en contact avec le produit hygroscopique pulvérulent.The invention provides a method for dissolving a quantity solid detergent product in a finely divided state, shaking it with a given amount of liquid, which is very precise, which automates easily and which, above all, is very safe for the personnel of the laundry, avoiding it coming into contact with the product powdery hygroscopic.

Le procédé suivant l'invention est défini à la revendication 1.The method according to the invention is defined in claim 1.

L'utilisation d'une vis convoyeuse à fourreau fermé et d'une cuve montée sur un dispositif de pesage non seulement est précise et se prête à l'automatisation, mais surtout permet d'enfermer les poudres détergentes hygroscopiques à l'abri de l'air dans la vis en sorte que, d'une part, le personnel est protégé et que, malgré que les poudres soient sensibles à l'hygrométrie de l'air, il ne se produit pas un blocage dans la vis pouvant en provoquer la rupture, puisque l'action de l'air n'a lieu éventuellement qu'à la sortie de la vis.The use of a closed barrel conveyor screw and a tank mounted on a weighing device not only is precise and suitable for automation, but above all allows to lock detergent powders hygroscopic sheltered from the air in the screw so that, on the one hand, the personnel is protected and that, although the powders are sensitive to air humidity, there is no blockage in the screw which can cause rupture, since the action of air possibly only takes place at the screw outlet.

La revendication 2 indique un procédé simple pour disposer en permanence d'une réserve de solution. Claim 2 indicates a simple method for disposing of permanence of a solution reserve.

La revendication 3 permet de surveiller simplement que le procédé se déroule normalement, tandis que la revendication 4 présente le très grand intérêt de prévenir tout échauffement des poudres détergentes hygroscopiques provoqué par une rotation trop rapide de la vis. De plus, cette rotation relativement lente donne une très bonne homogénéisation.Claim 3 allows to simply monitor that the process is proceeds normally, while claim 4 presents the very large advantage of preventing any heating of detergent powders hygroscopic caused by too rapid rotation of the screw. Moreover, this relatively slow rotation gives very good homogenization.

L'invention vise également un dispositif de dissolution d'un produit solide tel que défini à la revendication 5.The invention also relates to a device for dissolving a product. solid as defined in claim 5.

Pour mieux étaler la dose de produit dans la vis et prévenir ainsi encore mieux toute éventualité de bouchage et avoir un dosage plus précis, la vis convoyeuse a un pas plus grand du côté de l'extrémité de sortie que du côté de l'extrémité d'entrée. Il vaut mieux également, à cet effet, que le bord libre de la vis soit cranté.To better spread the dose of product in the screw and thus prevent even better any possibility of clogging and having a more precise dosage, the conveyor screw has a larger pitch on the outlet end side than the side of the inlet end. It is also better for this purpose than the edge free of the screw is notched.

Le dispositif comprend également un conduit débouchant dans la cuve et monté sans peser sur le dispositif de pesage. Ce conduit permet d'envoyer du liquide, notamment de l'eau, dans la cuve en une quantité donnée en ouvrant puis en fermant une vanne montée sur le conduit. Le dispositif peut comporter aussi un agitateur du contenu de la cuve.The device also includes a conduit opening into the tank and mounted without weighing on the weighing device. This conduit allows to send liquid, in particular water, into the tank in a quantity given by opening and then closing a valve mounted on the conduit. The device may also include an agitator of the contents of the tank.

De préférence, les moyens de maintien du sac comprennent un cylindre fermé, d'axe vertical, de réception de l'extrémité du sac contenant de la poudre détergente. Le diamètre du cylindre est supérieur au diamètre de l'extrémité du sac comportant l'ouverture quand le sac est fermé par un lacet, mais inférieur au diamètre de l'ouverture du sac quand, le lacet étant délacé, le sac est ouvert. On peut délacer le lacet en passant par l'ouverture ménagée par un volet susceptible d'être ouvert temporairement et prévu dans la face latérale du cylindre.Preferably, the bag holding means comprise a closed cylinder, vertical axis, receiving the end of the bag containing detergent powder. The diameter of the cylinder is greater than the diameter of the end of the bag comprising the opening when the bag is closed by a lace, but less than the diameter of the opening of the bag when, the lace being unlaced, the bag is open. You can unlace the lace through the opening provided by a shutter capable of being opened temporarily and provided for in the side face of the cylinder.

La figure unique du dessin annexé décrit un dispositif de dissolution suivant l'invention.The single figure of the accompanying drawing describes a dissolution device according to the invention.

Le dispositif comprend une cuve 1 de mélange, qui repose sur trois jauges 2 de contrainte disposées de manière répartie sur la périphérie du fond de la cuve 1 et formant dispositif de pesage, et une vis convoyeuse 3 sans fin, qui alimente la cuve 1 en poudre. La vis 3 à moteur M1 comporte un fourreau 4 cylindrique fermé. Le bord libre de la vis est cranté. Le pas de la vis 3 est plus grand du côté de la sortie que de l'entrée du produit en provenance d'un sac 5. The device comprises a mixing tank 1, which rests on three strain gauges 2 arranged in a distributed manner on the periphery of the bottom of tank 1 and forming weighing device, and a conveyor screw 3 endless, which feeds the tank 1 in powder. Screw 3 with M1 motor has a closed cylindrical sheath 4. The free edge of the screw is notched. The step of the screw 3 is larger on the outlet side than the product entry side from a bag 5.

Le sac 5 de poudre, suspendu à un palan 6, est disposé en ayant son ouverture tournée vers le bas dans un cylindre muni d'un volet 7 ouvrable. Le cylindre communique avec un entonnoir 8 dont le goulot 9 communique avec l'extrémité 10 d'entrée de la vis convoyeuse 3.The powder bag 5, suspended from a hoist 6, is arranged with its opening facing downwards in a cylinder fitted with a flap 7 which can be opened. The cylinder communicates with a funnel 8 whose neck 9 communicates with the inlet end 10 of the conveyor screw 3.

L'extrémité 11 de sortie de la vis débouche au sommet de la cuve 1 en regard d'une ouverture 12 ménagée dans la partie supérieure de la cuve, l'extrémité 11 n'étant pas en contact avec le bord de l'ouverture 12.The outlet end 11 of the screw opens at the top of the tank 1 in look of an opening 12 formed in the upper part of the tank, the end 11 not being in contact with the edge of the opening 12.

La vis convoyeuse 3 ne pèse pas sur la cuve 1.The conveyor screw 3 does not weigh on the tank 1.

Un conduit 14 d'alimentation en eau relie, par l'intermédiaire d'une vanne 15 de commande la cuve 1, sans cependant peser sur la cuve 1, et débouche dans le bas de la cuve 1.A water supply duct 14 connects, via a valve 15 for controlling the tank 1, without however weighing on the tank 1, and opens at the bottom of the tank 1.

Un conduit 16 met la cuve 1 en communication avec une cuve de dosage qui alimente un dispositif de lavage (non représenté) par l'intermédiaire d'une pompe P et d'une vanne 17. Le conduit 16 est disposé de manière à ne pas peser sur la cuve 1.A conduit 16 places the tank 1 in communication with a dosing which feeds a washing device (not shown) via a pump P and a valve 17. The duct 16 is arranged so as not to not weigh on the tank 1.

Un dispositif 19 de commande est relié, par l'intermédiaire de plusieurs conducteurs électriques, respectivement aux jauges 2 de contrainte, à la vanne 15, au moteur M1 d'entraínement destiné à entraíner la vis 3 convoyeuse, à la vanne 17, à la pompe P et à un moteur M2 d'un agitateur du contenu de la cuve 1.A control device 19 is connected, via several electrical conductors, respectively to the strain gauges 2, to the valve 15, to the drive motor M1 intended to drive the screw 3 conveyor, to valve 17, to pump P and to a motor M2 of an agitator of the contents of tank 1.

Ce dispositif 19 de commande commande l'ouverture ou la fermeture de la vanne 15, la mise en marche et l'arrêt du moteur M1 en fonction des signaux émis par le capteur de niveau et par les jauges 2 de contrainte et reçus par le dispositif 19 de commande.This control device 19 controls the opening or closing of valve 15, starting and stopping the motor M1 according to the signals emitted by the level sensor and by the strain gauges 2 and received by the control device 19.

Lorsque le signal fourni par les jauges 2 de contraintes au dispositif 19 de commande et qui représente le poids de la cuve indique que le poids de la cuve est devenu inférieur à une première valeur prescrite, le dispositif de commande 19 fait fonctionner le moteur M1 afin d'alimenter en poudre la cuve 1. Une fois que le poids de la cuve 1 a atteint une seconde valeur prescrite supérieure à la première valeur prescrite mentionnée précédemment, le dispositif de commande, informé par le signal émis par les jauges 2 de contraintes, arrête le moteur M1 et ouvre la vanne 15 jusqu'à atteindre une troisième valeur prescrite où il ferme la vanne 15.When the signal supplied by the strain gauges 2 to the device 19 which represents the weight of the tank indicates that the weight of the tank became below a first prescribed value, the control 19 operates the motor M1 to supply powder to the tank 1. Once the weight of tank 1 has reached a second prescribed value greater than the first prescribed value mentioned above, the control device, informed by the signal from the gauges 2 of constraints, stops the motor M1 and opens the valve 15 until reaching a third prescribed value where it closes valve 15.

Comme la vis 3 ne pèse pas sur la cuve 1, le signal de mesure du poids de la cuve 1 fourni par les jauges 2 de contrainte est bien plus fiable que dans les dispositifs de l'art antérieur et un dosage précis du mélange peut être obtenu par le dispositif 19 de commande. En outre, comme la vis convoyeuse est enfermée dans son fourreau, l'alimentation en poudre a lieu de manière bien uniforme et continue, sans que de l'air y pénètre. L'inertie de la vis entre le moment où le moteur M1 est arrêté par le dispositif de commande 19 et le moment où de la poudre cesse de tomber dans la cuve 1 est nettement plus faible que dans les dispositifs de l'art antérieur.As the screw 3 does not weigh on the tank 1, the weight measurement signal of the tank 1 provided by the strain gauges 2 is much more reliable than in prior art devices and an accurate dosage of the mixture can be obtained by the control device 19. In addition, like the conveyor screw is locked in its sheath, the powder feed takes place so well uniform and continuous, without air entering it. The inertia of the screw between the moment when the engine M1 is stopped by the control device 19 and the the moment the powder stops falling into the container 1 is much more weak than in the devices of the prior art.

Comme la face latérale extérieure de la zone d'ouverture du sac 5 vient s'appliquer, par le poids même de la poudre, étroitement sur la face latérale intérieure du cylindre muni du volet 7, de la poudre ne peut pas s'échapper à l'extérieur, polluer l'atelier et gêner le personnel, lequel n'est pas du tout en contact avec elle.As the outer side face of the bag opening area 5 comes apply, by the very weight of the powder, tightly to the side inside of the cylinder fitted with the flap 7, the powder cannot escape outside, pollute the workshop and annoy the staff, who are not at all contact with her.

Claims (8)

  1. A process for dissolving a prescribed quantity of finely divided solid detergent product by stirring it with a given quantity of liquid, characterised in that it consists in
    delivering detergent product in the prescribed quantity into a vessel provided with a stirrer and bearing down on a weighing device, using a closed-barrel conveying screw mounted in such a way as to discharge the product into the vessel but not to bear down on the weighing device, and
    delivering liquid in the given quantity into the vessel via a conduit opening into the vessel without bearing down on the weighing device.
  2. A process according to claim 1, characterised in that it consists in delivering product into the vessel by means of the screw as soon as the weight measured by the weighing device is lower than a first threshold, until a second weight threshold is reached, in then stopping delivery of the powder into the vessel via the screw, then in delivering water into the vessel via the conduit until a third weight threshold is reached and in then stopping delivery of the water into the vessel.
  3. A process according to claim 2, characterised by means of comparing the actual product and/or water delivery period with a given period and by alarm means which operate if the actual period exceeds the given period.
  4. A process according to claim 1, 2 or 3, characterised in that it consists in rotating the screw at a speed lower than 30 rpm.
  5. A dissolution device for a solid detergent product, characterised in that it comprises:
    a vessel (1) provided with a stirrer and mounted so as to bear down on a weighing device (2),
    a conduit (14) opening into the vessel and mounted without bearing down on the weighing device,
    a conveying screw (3) with closed barrel (4), the outlet end of which opens into the upper part of the vessel (1) and which is mounted without bearing down on the weighing device (2), and means (7, 8) of holding a bag (5) in such a way that the opening of the bag (5) faces downwards and communicates with the inlet end of the conveying screw (3).
  6. A device according to claim 5, characterised in that the conveying screw (3) has a larger pitch towards the outlet end than towards the inlet end.
  7. A device according to claim 6, characterised in that the free edge of the conveying screw (3) is notched.
  8. A device according to one of claims 5 to 7, characterised in that the bag holding means comprise a closed cylinder surrounding the opening of the bag (5) and the side face of which comprises a flap (7) which may be opened,
EP97401506A 1997-06-27 1997-06-27 Process and apparatus for the dissolution of a solid product Expired - Lifetime EP0917906B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP97401506A EP0917906B1 (en) 1997-06-27 1997-06-27 Process and apparatus for the dissolution of a solid product
PT97401506T PT917906E (en) 1997-06-27 1997-06-27 PROCESS AND DEVICE FOR DISSOLUTION OF A SOLID PRODUCT
DE69706425T DE69706425T2 (en) 1997-06-27 1997-06-27 Method and device for dissolving a solid product
AT97401506T ATE204786T1 (en) 1997-06-27 1997-06-27 METHOD AND DEVICE FOR DISSOLVING A SOLID PRODUCT
DK97401506T DK0917906T3 (en) 1997-06-27 1997-06-27 Method of dissolving a solid and device for carrying out the process
ES97401506T ES2159821T3 (en) 1997-06-27 1997-06-27 DISSOLUTION PROCEDURE AND DEVICE OF A SOLID PRODUCT.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97401506A EP0917906B1 (en) 1997-06-27 1997-06-27 Process and apparatus for the dissolution of a solid product

Publications (2)

Publication Number Publication Date
EP0917906A1 EP0917906A1 (en) 1999-05-26
EP0917906B1 true EP0917906B1 (en) 2001-08-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97401506A Expired - Lifetime EP0917906B1 (en) 1997-06-27 1997-06-27 Process and apparatus for the dissolution of a solid product

Country Status (6)

Country Link
EP (1) EP0917906B1 (en)
AT (1) ATE204786T1 (en)
DE (1) DE69706425T2 (en)
DK (1) DK0917906T3 (en)
ES (1) ES2159821T3 (en)
PT (1) PT917906E (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006000237A1 (en) 2004-06-23 2006-01-05 Ecolab Inc. Method for multiple dosage of liquid products, dosing appartus and dosing system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7201290B2 (en) 2003-05-12 2007-04-10 Ecolab Inc. Method and apparatus for mass based dispensing
US8277745B2 (en) 2007-05-02 2012-10-02 Ecolab Inc. Interchangeable load cell assemblies
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DE69706425D1 (en) 2001-10-04
EP0917906A1 (en) 1999-05-26
ATE204786T1 (en) 2001-09-15
DK0917906T3 (en) 2001-10-08
ES2159821T3 (en) 2001-10-16
PT917906E (en) 2001-12-28
DE69706425T2 (en) 2002-05-29

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