WO2002031472A1 - Device for measuring rheological characteristics of concentrated solutions, gels or suspensions, in particular sludge used in water treatment - Google Patents

Device for measuring rheological characteristics of concentrated solutions, gels or suspensions, in particular sludge used in water treatment Download PDF

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Publication number
WO2002031472A1
WO2002031472A1 PCT/FR2001/003021 FR0103021W WO0231472A1 WO 2002031472 A1 WO2002031472 A1 WO 2002031472A1 FR 0103021 W FR0103021 W FR 0103021W WO 0231472 A1 WO0231472 A1 WO 0231472A1
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WIPO (PCT)
Prior art keywords
tube
enclosure
volume
liquid
deformation
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PCT/FR2001/003021
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French (fr)
Inventor
François Colin
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Ondeo Services
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Publication date
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Priority to AU2001293935A priority Critical patent/AU2001293935A1/en
Publication of WO2002031472A1 publication Critical patent/WO2002031472A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
    • G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
    • G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
    • G01N11/08—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by measuring pressure required to produce a known flow

Definitions

  • the present invention relates to a device for measuring the rheological characteristics, in particular of relatively concentrated solutions or suspensions or of fluids of the gel type capable of being conveyed by a positive displacement pump, preferably with a uniform and continuous adjustable flow.
  • This invention proposes more particularly to provide a device for measuring the viscosity of relatively concentrated suspensions of biological or inorganic sludge used in the water treatment industry, for example having a concentration of between 10 and 60 g / l expressed as dry matter.
  • the invention provides a rheological measurement device in which the fluid, solution, gel or suspension, the viscosity of which is to be measured, is put into flow, at constant flow rate and in laminar regime, in a tube said “measurement tube” and the pressure drops in this tube are measured, this device being characterized in that said measurement tube is made of a deformable material with shape memory, which is immersed in an enclosure containing a liquid, in particular water and in that the pressure drops in the tube are measured using means measuring any rise in the level of the liquid in the enclosure resulting from an increase in volume of the tube, following its deformation, when the solution or fluid flows.
  • the variations in rheological characteristics induce variations in pressure drop and therefore variations in internal pressure which more or less expand the tube.
  • These variations are measured according to the invention, for example by measuring the variations in volume of the deformable tube.
  • the material constituting the deformable tube is chosen for its elasticity, its ability to regain its shape and its initial dimensions after the application of the stress and its resistance to abrasion as well as to the chemical constituents possibly conveyed.
  • This tube can more particularly consist of an elastomer, natural or synthetic.
  • the deformable tube is wound in a spiral and the enclosure in which it is immersed is completely filled with liquid, in particular water, provided at its upper part with an open vertical tube. on its side opening to the outside, this vertical tube being graduated in order to measure a rise in the level of the water in the enclosure resulting from an increase in the volume of the tube made of deformable material in which the fluid circulates, in particular a suspension solid particles whose rheological characteristics we want to measure.
  • the deformable tube is also wound in a spiral and the enclosure in which it is completely submerged is sealed and partially filled with liquid, in particular water, the upper volume of the sealed enclosure being filled a gaseous phase, in particular air, which compresses when the tube deforms and its volume increases, a pressure gauge positioned on the upper volume of said enclosure ensuring the measurement of pressure variations corresponding to the volume variations of the tube submerged following the deformation of the latter.
  • said liquid is chosen so that it does not dissolve in particular the gas contained in the upper part of the enclosure.
  • the means measuring the deformations of the tube are made up of sensors making it possible to record and transmit measurement results.
  • FIG. 1 illustrates the embodiment of the invention according to which the increase in volume of the deformable tube is measured, directly by measuring the displacement of a fluid contained in an enclosure in which is immersed the tube.
  • the deformable tube 1 made of elastomer with shape memory, of small thickness (the latter being chosen in relation to the sensitivity desired for the measurement) is wound in the form of turns of sufficient diameter to avoid effects of curvature that are too marked.
  • the spiral tube 1 is immersed in an enclosure 2 completely filled with a liquid, for example water, which is provided at its upper part with a graduated open vertical tube 3.
  • the fluid for which the rheological characteristics are to be measured for example a thickened liquid mud, circulates continuously, at constant flow rate, in the measurement tube 1 under the action of a pump 4.
  • FIG. 2 relates to the embodiment of the invention according to which the increase in volume of the deformable tube is measured, directly by measuring the pressure variations in the gas compartment of a sealed enclosure partially filled with a liquid in which the tube is completely immersed.
  • Figure 2 we find the deformable measuring tube 1 wound in a spiral and which is completely immersed in a liquid, for example water, contained in a sealed enclosure 2 '.
  • a liquid for example water
  • a sealed enclosure 2 ' In the upper part there is a space filled with a gas 5, for example air, which compresses when the volume of the measuring tube 1 increases due to the pressure variations induced by the pressure drops in the tube.
  • a pressure gauge 6 is provided for measuring the variations in gas pressure 5.
  • the immersion of the measurement tube 1 in an enclosure 2 or 2 ′ completely or partially filled with a liquid facilitates the temperature regulation of the measurement tube 1, thus avoiding overheating thereof by friction due to the flow of the fluid, the rheological characteristics of which are measured.
  • the height of the vertical tube 3, or the initial pressure of the gas phase 5 filling the upper volume of the sealed enclosure 2 exerts a back pressure in said enclosure to limit the deformation of the material constituting the tube 1 (in particular elastomer).
  • the corresponding charge chosen according to the operating conditions of the device (viscosity and flow rate of the fluid measured, property of the tube made of deformable material with shape memory) is usually between 0.5 and 7 meters in height of water column and can be provided by any suitable chemical inertness fluid and density.
  • the device according to the invention is sensitive enough to detect variations in the degree of flocculation and / or concentration of a sludge, which demonstrates its ability to detect variations in rheological properties consecutive to variations in concentration or in the degree of flocculation. sludge.

Abstract

The invention concerns a device for measuring rheological characteristics, in particular viscosity of relative concentrated solutions or suspensions or gel-type fluids circulated at constant flow rate in tubes whereof the pressure drops are measured. The invention is characterised in that said tube (1) is made of a shape-memory deformable material, which is immersed in a chamber (2) containing a liquid, in particular water, and the pressure drops in the tube are measured with means measuring any rise in the level of the liquid in the chamber (2) resulting from an increase in the volume of the tube (1), subsequent to its deformation when the solution or fluid is flowing.

Description

DISPOSITIF DE MESURE DES CARACTERISTIQUE RHEOLOGIQUES DE SOLUTIONS CONCENTREES, DE GELS OU DE SUSPENSIONS, NOTAMMEMT DE BOUES MISES EN OEUVRE DANS LE TRAITEMENT DE L'EAUDEVICE FOR MEASURING THE RHEOLOGICAL CHARACTERISTICS OF CONCENTRATED SOLUTIONS, GELS OR SUSPENSIONS, ESPECIALLY SLUDGES USED IN THE TREATMENT OF WATER
La présente invention concerne un dispositif de mesure des caractéristiques rhéologiques, notamment de solutions ou suspensions relativement 10 concentrées ou de fluides de type gel susceptibles d'être véhiculés par une pompe volumétrique, de préférence à débit uniforme et continu réglable.The present invention relates to a device for measuring the rheological characteristics, in particular of relatively concentrated solutions or suspensions or of fluids of the gel type capable of being conveyed by a positive displacement pump, preferably with a uniform and continuous adjustable flow.
Cette invention se propose plus particulièrement d'apporter un dispositif de mesure de la viscosité des suspensions relativement concentrées de boues 15 biologiques ou inorganiques, mises en oeuvre dans l'industrie du traitement des eaux, présentant par exemple une concentration comprise entre 10 et 60 g/l exprimés en matière sèche.This invention proposes more particularly to provide a device for measuring the viscosity of relatively concentrated suspensions of biological or inorganic sludge used in the water treatment industry, for example having a concentration of between 10 and 60 g / l expressed as dry matter.
On sait que des mesures rhéologiques permettent en particulier d'évaluer le 20 degré de floculation des boues (par exemple adjonction d'agents de floculation tels que des poiyélectrolytes) ainsi que leur résistance au cisaillement et par conséquent leur résistance à la déstructuration, par exemple d'origine mécanique.It is known that rheological measurements make it possible in particular to evaluate the degree of flocculation of the sludge (for example addition of flocculating agents such as polyelectrolytes) as well as their shear strength and therefore their resistance to destructuring, for example mechanical origin.
25 A l'heure actuelle la caractérisation en continu des propriétés rhéologiques.des boues liquides concentrées n'est pas totalement maîtrisée et elle pose des problèmes métrologiques difficiles à résoudre. Ces difficultés sont dues principalement au fait que les viscosimètres actuellement connus posent des problèmes de fiabilité (notamment enAt present, the continuous characterization of the rheological properties of concentrated liquid sludge is not completely mastered and it poses metrological problems which are difficult to solve. These difficulties are mainly due to the fact that the currently known viscometers pose reliability problems (in particular in
30 raison de la présence de bouchages) lorsqu'on les utilise pour la caractérisation rhéologique de suspensions hétérogènes, comme on l'explique ci-après. Divers types de viscomètres ont été décrits et fabriqués à ce jour :30 due to the presence of blockages) when used for the rheological characterization of heterogeneous suspensions, as explained below. Various types of viscometers have been described and manufactured to date:
- le viscosimètre de Couette, constitué de cylindres coaxiaux en mouvement relatif,- the Couette viscometer, made up of coaxial cylinders in relative motion,
- le viscosimètre rotatif cône-plan.- the cone-plane rotary viscometer.
Ces deux types de viscosimètres font intervenir une mesure de couple sur l'axe supportant soit l'un des cylindres, soit le cône, ce couple étant fonction des caractéristiques rhéologiques du produit à étudier; et notamment de sa viscosité dans le cas d'un fluide dit newtonien; - les viscosimètres du type « capillaire » qui font intervenir une mesure de perte de charge dans des tubes de diamètre plus ou moins faible et de plus ou moins grande longueur, la perte de charge, à débit constant étant fonction des caractéristiques rhéologiques du fluide circulant dans les tubes.These two types of viscometers involve a measurement of torque on the axis supporting either one of the cylinders or the cone, this torque being a function of the rheological characteristics of the product to be studied; and in particular its viscosity in the case of a so-called Newtonian fluid; - “capillary” type viscometers which involve a measurement of pressure drop in tubes of more or less small diameter and of more or less length, the pressure drop, at constant flow rate being a function of the rheological characteristics of the circulating fluid in the tubes.
Ainsi qu'on l'a mentionné ci-dessus, ces divers dispositifs selon la technique antérieure se révèlent, à l'usage, mal adaptés aux mesures des caractéristiques rhéologiques des suspensions ou des boues, principalement en raison des propriétés colmatantes du système bi- phasique. Par ailleurs, la viscosité des suspensions à faible concentration en solides est très voisine de celle de l'eau et la sensibilité des mesures est, dans ce cas, tout à fait insuffisante.As mentioned above, these various devices according to the prior art prove, in use, ill-suited to measurements of the rheological characteristics of suspensions or sludges, mainly due to the clogging properties of the bi- phasic. Furthermore, the viscosity of suspensions with a low solids concentration is very close to that of water and the sensitivity of the measurements is, in this case, entirely insufficient.
Afin de résoudre ce problème technique, l'invention apporte un dispositif de mesure rhéologique dans lequel le fluide, solution, gel ou suspension, dont on veut mesurer la viscosité, est mis en écoulement, à débit constant et en régime laminaire, dans un tube dit « tube de mesure » et on mesure les pertes de charge dans ce tube, ce dispositif étant caractérisé en ce que ledit tube de mesure est constitué d'un matériau deformable à mémoire de forme, qui est immergé dans une enceinte contenant un liquide, notamment de l'eau et en ce que les pertes de charge dans le tube sont mesurées à l'aide de moyens mesurant toute élévation du niveau du liquide dans l'enceinte résultant d'une augmentation de volume du tube, consécutive à sa déformation, lors de l'écoulement de la solution ou du fluide. Comme on le comprend, lors de la circulation du fluide dans le tube deformable, les variations de caractéristiques rhéologiques, induisent des variations de pertes de charge et donc des variations de pression interne qui dilatent plus ou moins le tube. Ces variations sont mesurées selon l'invention, par exemple par la mesure des variations de volume du tube deformable.In order to solve this technical problem, the invention provides a rheological measurement device in which the fluid, solution, gel or suspension, the viscosity of which is to be measured, is put into flow, at constant flow rate and in laminar regime, in a tube said “measurement tube” and the pressure drops in this tube are measured, this device being characterized in that said measurement tube is made of a deformable material with shape memory, which is immersed in an enclosure containing a liquid, in particular water and in that the pressure drops in the tube are measured using means measuring any rise in the level of the liquid in the enclosure resulting from an increase in volume of the tube, following its deformation, when the solution or fluid flows. As can be understood, during the circulation of the fluid in the deformable tube, the variations in rheological characteristics induce variations in pressure drop and therefore variations in internal pressure which more or less expand the tube. These variations are measured according to the invention, for example by measuring the variations in volume of the deformable tube.
Selon l'invention le matériau constitutif du tube deformable est choisi pour son élasticité, son aptitude à retrouver sa forme et ses dimensions initiales après l'application de la contrainte et sa résistance à l'abrasion ainsi qu'aux constituants chimiques éventuellement véhiculés. Ce tube peut être plus particulièrement constitué d'un élastomère, naturel ou synthétique.According to the invention, the material constituting the deformable tube is chosen for its elasticity, its ability to regain its shape and its initial dimensions after the application of the stress and its resistance to abrasion as well as to the chemical constituents possibly conveyed. This tube can more particularly consist of an elastomer, natural or synthetic.
Selon un mode de réalisation du dispositif selon l'invention le tube deformable est enroulé en spirale et l'enceinte dans laquelle il est immergé est totalement remplie de liquide, notamment d'eau, munie à sa partie supérieure, d'un tube vertical ouvert sur son côté débouchant à l'extérieur, ce tube vertical étant gradué afin de mesurer une élévation du niveau de l'eau dans l'enceinte résultant d'une augmentation du volume du tube en matériau deformable dans lequel circule le fluide, notamment une suspension de particules solides dont on veut mesurer les caractéristiques rhéologiques-.According to one embodiment of the device according to the invention, the deformable tube is wound in a spiral and the enclosure in which it is immersed is completely filled with liquid, in particular water, provided at its upper part with an open vertical tube. on its side opening to the outside, this vertical tube being graduated in order to measure a rise in the level of the water in the enclosure resulting from an increase in the volume of the tube made of deformable material in which the fluid circulates, in particular a suspension solid particles whose rheological characteristics we want to measure.
Selon un autre mode de réalisation de cette invention le tube deformable est également enroulé en spirale et l'enceinte dans laquelle il est totalement immergé est étanche et partiellement remplie de liquide, notamment d'eau, le volume supérieur de l'enceinte étanche étant rempli d'une phase gazeuse, notamment de l'air, qui se comprime lorsque le tube se déforme et que son volume augmente, un manomètre positionné sur le volume supérieur de ladite enceinte assurant la mesure des variations de pression correspondant aux variations de volume du tube immergé consécutives à la déformation de ce dernier. Selon l'invention ledit liquide est choisi de telle sorte qu'il ne dissolve pas notamment le gaz contenu dans la partie supérieure de l'enceinte.According to another embodiment of this invention, the deformable tube is also wound in a spiral and the enclosure in which it is completely submerged is sealed and partially filled with liquid, in particular water, the upper volume of the sealed enclosure being filled a gaseous phase, in particular air, which compresses when the tube deforms and its volume increases, a pressure gauge positioned on the upper volume of said enclosure ensuring the measurement of pressure variations corresponding to the volume variations of the tube submerged following the deformation of the latter. According to the invention, said liquid is chosen so that it does not dissolve in particular the gas contained in the upper part of the enclosure.
Selon un autre mode de réalisation de l'invention les moyens mesurant les déformations du tube sont constités de capteurs permettant d'enregistrer et de transmettre des résultats de mesure.According to another embodiment of the invention, the means measuring the deformations of the tube are made up of sensors making it possible to record and transmit measurement results.
D'autres caractéristiques et avantages de cette invention ressortiront de la description faite ci-après en référence aux dessins annexés qui en illustrent des modes de réalisation dépourvus de tout caractère limitatif. Sur les dessins; les figures 1 et 2 sont des vues schématiques illustrant deux exemples de réalisation d'un dispositif selon l'invention.Other characteristics and advantages of this invention will emerge from the description given below with reference to the appended drawings which illustrate embodiments thereof which are devoid of any limiting character. In the drawings; Figures 1 and 2 are schematic views illustrating two embodiments of a device according to the invention.
On se réfère en premier lieu à la figure 1 qui illustre le mode de rpise en oeuvre de l'invention selon lequel on mesure l'augmentation de volume du tube deformable, directement en mesurant le déplacement d'un fluide contenu dans une enceinte dans laquelle est immergé le tube.Firstly, reference is made to FIG. 1 which illustrates the embodiment of the invention according to which the increase in volume of the deformable tube is measured, directly by measuring the displacement of a fluid contained in an enclosure in which is immersed the tube.
A cet effet le tube deformable 1 en élastomère à mémoire de forme, de faible épaisseur (cette dernière étant choisie en relation avec la sensibilité désirée pour la mesure) est enroulé sous forme de spires de diamètre suffisant pour éviter des effets de courbure trop marqués. Le tube 1 en spirale est immergé dans une enceinte 2 totalement remplie d'un liquide, par exemple de l'eau et qui est munie à sa partie supérieure d'un tube vertical ouvert gradué 3.To this end, the deformable tube 1 made of elastomer with shape memory, of small thickness (the latter being chosen in relation to the sensitivity desired for the measurement) is wound in the form of turns of sufficient diameter to avoid effects of curvature that are too marked. The spiral tube 1 is immersed in an enclosure 2 completely filled with a liquid, for example water, which is provided at its upper part with a graduated open vertical tube 3.
Le fluide dont on veut mesurer les caractéristiques rhéologiques, par exemple une boue liquide épaissie, circule en continu, à débit constant, dans le tube de mesure 1 sous l'action d'une pompe 4.The fluid for which the rheological characteristics are to be measured, for example a thickened liquid mud, circulates continuously, at constant flow rate, in the measurement tube 1 under the action of a pump 4.
L'augmentation du volume du tube de mesure résultant de sa déformation due aux variations de pression induites par les pertes de charge dans ce tube, se traduit par une élévation du niveau du liquide dans le tube gradué 3.The increase in the volume of the measuring tube resulting from its deformation due to the pressure variations induced by the pressure drops in this tube, results in a rise in the level of the liquid in the graduated tube 3.
L'exemple de réalisation illustré par la figure 2 concerne le mode de mise en oeuvre de l'invention selon lequel on mesure l'augmentation de volume du tube deformable, directement en mesurant les variations de pression dans le compartiment gazeux d'une enceinte étanche remplie partiellement d'un liquide dans lequel est totalement immergé le tube.The embodiment illustrated by FIG. 2 relates to the embodiment of the invention according to which the increase in volume of the deformable tube is measured, directly by measuring the pressure variations in the gas compartment of a sealed enclosure partially filled with a liquid in which the tube is completely immersed.
Sur la figure 2 on retrouve le tube de mesure deformable 1 enroulé en spirale et qui est totalement immergé dans un liquide, par exemple de l'eau, contenu dans une enceinte étanche 2'. Celle-ci comporte en partie supérieure un espace rempli d'un gaz 5, par exemple de l'air, qui se comprime lorsque le volume du tube de mesure 1 augmente en raison des variations de pression induites par les pertes de charge dans le tube. Un manomètre 6 est prévu pour mesurer les variations de pression du gaz 5.In Figure 2 we find the deformable measuring tube 1 wound in a spiral and which is completely immersed in a liquid, for example water, contained in a sealed enclosure 2 '. In the upper part there is a space filled with a gas 5, for example air, which compresses when the volume of the measuring tube 1 increases due to the pressure variations induced by the pressure drops in the tube. . A pressure gauge 6 is provided for measuring the variations in gas pressure 5.
Dans les deux modes de réalisation décrits ci-dessus en référence aux figures 1 et 2, l'immersion du tube de mesure 1 dans une enceinte 2 ou 2' remplie totalement ou partiellement d'un liquide facilite la régulation de température du tube de mesure 1 , évitant ainsi un échauffement de celui-ci par frottement dû à l'écoulement du fluide dont on mesure les caractéristiques rhéologiques.In the two embodiments described above with reference to FIGS. 1 and 2, the immersion of the measurement tube 1 in an enclosure 2 or 2 ′ completely or partially filled with a liquid facilitates the temperature regulation of the measurement tube 1, thus avoiding overheating thereof by friction due to the flow of the fluid, the rheological characteristics of which are measured.
Selon l'invention on peut en outre prévoir des capteurs, remplaçant respectivement le tube gradué 3 (figure 1 ) et le manomètre 6 (figure 2) de façon à permettre un enregistrement et une transmission des résultats des mesures.According to the invention, it is also possible to provide sensors, respectively replacing the graduated tube 3 (FIG. 1) and the pressure gauge 6 (FIG. 2) so as to allow recording and transmission of the results of the measurements.
Selon un autre exemple de réalisation de l'invention, la hauteur du tube vertical 3, ou la pression initiale de la phase gazeuse 5 remplissant le volume supérieur de l'enceinte étanche 2, exerce une contre-pression dans ladite enceinte pour limiter la déformation du matériau constitutif du tube 1 (notamment élastomère).According to another exemplary embodiment of the invention, the height of the vertical tube 3, or the initial pressure of the gas phase 5 filling the upper volume of the sealed enclosure 2, exerts a back pressure in said enclosure to limit the deformation of the material constituting the tube 1 (in particular elastomer).
La charge correspondante, choisie en fonction des conditions de fonctionnement du dispositif (viscosité et débit du fluide mesuré, propriété du tube en matériau deformable à mémoire de forme) est usuellement comprise entre 0,5 et 7 mètres de hauteur de colonne d'eau et peut être assurée par tout fluide d'inertie chimique et masse volumique convenables.The corresponding charge, chosen according to the operating conditions of the device (viscosity and flow rate of the fluid measured, property of the tube made of deformable material with shape memory) is usually between 0.5 and 7 meters in height of water column and can be provided by any suitable chemical inertness fluid and density.
Le dispositif selon l'invention est suffisamment sensible pour détecter les variations du degré de floculation et/ou de concentration d'une boue, ce qui démontre sa capacité à détecter des variations de propriétés rhéologiques consécutives à des variations de concentration ou au degré de floculation des boues.The device according to the invention is sensitive enough to detect variations in the degree of flocculation and / or concentration of a sludge, which demonstrates its ability to detect variations in rheological properties consecutive to variations in concentration or in the degree of flocculation. sludge.
Parmi les avantages apportés par l'invention on peut citer notamment :Among the advantages provided by the invention, there may be mentioned in particular:
- très grande simplicité de réalisation,- very simple implementation,
- faible coût d'exécution,- low cost of execution,
- fonctionnement sur une très large gamme de caractéristiques de boues (concentration en matières solides, degré de floculation...) avec une grande dynamique,- operation on a very wide range of sludge characteristics (solids concentration, degree of flocculation ...) with great dynamics,
- excellente fiabilité due à son insensibilité au colmatage.- excellent reliability due to its insensitivity to clogging.
Il demeure bien entendu que cette invention n'est pas limitée aux divers exemples de réalisation décrits et/ou représentés ici mais qu'elle en englobe toutes les variantes. It remains to be understood that this invention is not limited to the various embodiments described and / or shown here, but that it encompasses all variants thereof.

Claims

REVENDICATIONS
1. Dispositif de mesure des caractéristiques rhéologiques, notamment de la viscosité de solutions ou suspensions relativement concentrées ou de fluide de type gel mis en écoulement à débit constant dans un tube dont on mesure les pertes de charge, caractérisé en ce que ledit tube (1) est constitué d'un matériau deformable à mémoire de forme, qui est immergé dans une enceinte (2) contenant un liquide, notamment de l'eau, et en ce que les pertes de charge dans le tube sont mesurées à l'aide de moyens mesurant toute élévation du niveau du liquide dans l'enceinte (2) résultant d'une augmentation de volume du tube (1 ), consécutive à sa déformation, lors de l'écoulement de la solution ou du fluide.1. Device for measuring the rheological characteristics, in particular of the viscosity of relatively concentrated solutions or suspensions or of fluid of gel type put in flow at constant flow rate in a tube of which the pressure losses are measured, characterized in that said tube (1 ) consists of a deformable material with shape memory, which is immersed in an enclosure (2) containing a liquid, in particular water, and in that the pressure drops in the tube are measured using means measuring any rise in the level of the liquid in the enclosure (2) resulting from an increase in volume of the tube (1), consecutive to its deformation, during the flow of the solution or of the fluid.
2. Dispositif selon la revendication 1 , caractérisé en ce que le matériau constitutif du tube (1) est un élastomère, naturel ou synthétique.2. Device according to claim 1, characterized in that the material of the tube (1) is an elastomer, natural or synthetic.
3. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit tube deformable à mémoire de forme (1 ) est enroulé en spirale et en ce que l'enceinte (2), dans laquelle il est immergé est totalement remplie de liquide, et munie à sa partie supérieure, d'un tube vertical (3) ouvert sur son côté débouchant à l'extérieur, ledit tube étant gradué afin de mesurer toute élévation du niveau de l'eau dans l'enceinte (2), résultant d'une augmentation de volume du tube consécutive à une déformation du tube.3. Device according to any one of the preceding claims, characterized in that said deformable tube with shape memory (1) is wound in a spiral and in that the enclosure (2), in which it is immersed is completely filled with liquid, and provided at its upper part, with a vertical tube (3) open on its side opening to the outside, said tube being graduated in order to measure any rise in the level of the water in the enclosure (2), resulting from an increase in volume of the tube following a deformation of the tube.
4. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le tube deformable (1 ) est enroulé en spirale et il est totalement immergé dans l'enceinte (2'), cette dernière étant étanche et partiellement remplie de liquide, le volume supérieur de ladite enceinte étant rempli d'une phase gazeuse (5) notamment de l'air, qui se comprime lorsque le tube se déforme et que son volume augmente, un manomètre (6) positionné sur le volume supérieur de ladite enceinte assurant la mesure des variations de pression correspondant aux variations de volume du tube (1 ) consécutives à la déformation de ce dernier.4. Device according to any one of claims 1 or 2, characterized in that the deformable tube (1) is wound in a spiral and it is completely submerged in the enclosure (2 '), the latter being sealed and partially filled with liquid, the upper volume of said enclosure being filled with a gaseous phase (5), in particular air, which compresses when the tube deforms and its volume increases, a pressure gauge (6) positioned on the upper volume of said enclosure for measurement pressure variations corresponding to the volume variations of the tube (1) consecutive to the deformation of the latter.
5. Dispositif selon l'une des revendications 3 ou 4 caractérisé en ce que ledit liquide est choisi de telle sorte qu'il ne dissolve pas notamment le gaz contenu dans la partie supérieure de l'enceinte5. Device according to one of claims 3 or 4 characterized in that said liquid is chosen so that it does not dissolve in particular the gas contained in the upper part of the enclosure
6. Dispositif selon la revendication 1 , caractérisé en ce que les moyens mesurant toute augmentation du niveau de liquide dans l'enceinte (2, 2') résultant d'une augmentation du volume du tube (1 ) consécutive à ses déformations sont constitués par des capteurs permettant l'enregistrement et la transmission des résultats des mesures.6. Device according to claim 1, characterized in that the means measuring any increase in the level of liquid in the enclosure (2, 2 ') resulting from an increase in the volume of the tube (1) consecutive to its deformations are constituted by sensors for recording and transmitting measurement results.
7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la hauteur du tube (1 ) exerce une contre-pression dans l'enceinte (2) pour limiter la déformation du matériau constituant ledit tube.7. Device according to any one of the preceding claims, characterized in that the height of the tube (1) exerts a back pressure in the enclosure (2) to limit the deformation of the material constituting said tube.
8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la pression initiale de la phase gazeuse (5) remplissant le volume supérieur de l'enceinte (2') exerce une contre- pression dans ladite enceinte pour limiter la déformation du matériau constituant ledit tube. 8. Device according to any one of the preceding claims, characterized in that the initial pressure of the gas phase (5) filling the upper volume of the enclosure (2 ') exerts a back pressure in said enclosure to limit the deformation of the material constituting said tube.
PCT/FR2001/003021 2000-10-13 2001-09-28 Device for measuring rheological characteristics of concentrated solutions, gels or suspensions, in particular sludge used in water treatment WO2002031472A1 (en)

Priority Applications (1)

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AU2001293935A AU2001293935A1 (en) 2000-10-13 2001-09-28 Device for measuring rheological characteristics of concentrated solutions, gelsor suspensions, in particular sludge used in water treatment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR00/13170 2000-10-13
FR0013170A FR2815411B1 (en) 2000-10-13 2000-10-13 DEVICE FOR MEASURING THE RHEOLOGICAL CHARACTERISTICS OF CONCENTRATED SOLUTIONS, GELS OR SUSPENSIONS, ESPECIALLY SLUDGES USED IN THE TREATMENT OF WATER

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FR (1) FR2815411B1 (en)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185746A1 (en) * 2014-06-05 2015-12-10 Montanuniversität Leoben Device for measuring the shear stress of a viscous fluid
CN105842040B (en) * 2016-04-25 2018-09-21 北京建筑大学 A kind of method of inspection and device of sludge similar solution

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2345716A1 (en) * 1976-03-27 1977-10-21 Weber Gerhard PROCESS FOR DETERMINING THE RHEOLOGICAL BEHAVIOR OF LIQUIDS FOR A MEDICAL OR PHARMACEUTICAL PURPOSE, AND APPARATUS FOR IMPLEMENTING THE PROCESS
FR2482302A1 (en) * 1980-05-09 1981-11-13 Soletanche Continuous fluid viscosity meter for foundation laying - uses chamber where fluid exerts pressure on membrane separated measuring chamber
EP0083524A1 (en) * 1981-12-29 1983-07-13 Societe Nationale Elf Aquitaine (Production) Installation for controlling the continuous functioning of a chromatographic system
EP0458391A1 (en) * 1990-05-23 1991-11-27 Services Petroliers Schlumberger Pipe rheometer
US5770805A (en) * 1995-10-19 1998-06-23 Institut Francais Du Petrole Method and device for measuring a parameter of a fluid having variable density

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2345716A1 (en) * 1976-03-27 1977-10-21 Weber Gerhard PROCESS FOR DETERMINING THE RHEOLOGICAL BEHAVIOR OF LIQUIDS FOR A MEDICAL OR PHARMACEUTICAL PURPOSE, AND APPARATUS FOR IMPLEMENTING THE PROCESS
FR2482302A1 (en) * 1980-05-09 1981-11-13 Soletanche Continuous fluid viscosity meter for foundation laying - uses chamber where fluid exerts pressure on membrane separated measuring chamber
EP0083524A1 (en) * 1981-12-29 1983-07-13 Societe Nationale Elf Aquitaine (Production) Installation for controlling the continuous functioning of a chromatographic system
EP0458391A1 (en) * 1990-05-23 1991-11-27 Services Petroliers Schlumberger Pipe rheometer
US5770805A (en) * 1995-10-19 1998-06-23 Institut Francais Du Petrole Method and device for measuring a parameter of a fluid having variable density

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185746A1 (en) * 2014-06-05 2015-12-10 Montanuniversität Leoben Device for measuring the shear stress of a viscous fluid
CN105842040B (en) * 2016-04-25 2018-09-21 北京建筑大学 A kind of method of inspection and device of sludge similar solution

Also Published As

Publication number Publication date
FR2815411B1 (en) 2002-12-20
AU2001293935A1 (en) 2002-04-22
FR2815411A1 (en) 2002-04-19

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