Device and method for mixing, measuring the flow rate of and...

G - Physics – 01 – F

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G01F 15/08 (2006.01) G01F 1/36 (2006.01) G01F 1/52 (2006.01) G01F 1/74 (2006.01)

Patent

CA 2186376

The container (1) serves for mixing and measuring multi- phase fluids which are conducted in via a supply tube (2). The liquid and gaseous components are separated in the container (1) and collected into a liquid volume (14) as well as a gas volume (10). A liquid surface (14a) forms at the separating layer between the gas volume (10) and the liquid volume (14), the actual height (Z) of which is measured by a sensor (13). The fluids located in the container (1) are drawn back off out of the container (1) in the direction of flow (20a) in a flowing manner via a removal apparatus which comprises at least one removal apparatus (6) as well as a drainage means (8) adjoining it and are thereupon mixed . The drainage means (6) is arranged vertical to the liquid surface (14a) and has openings (7) which lie partly below and partly above the liquid surface (14a) during normal operation of the container (1). The drainage means (6) has a Venturi nozzle (9) in the region of the inlet opening (6a) in order to measure the flow rate of the gaseous component which flows through the inlet opening (6a) into the drainage means (6). A pressure sensor (11) is mounted in the region of the gas volume (10) in order to measure the pressure of the gaseous component. A signal evaluation apparatus (22) which receives the measured values calculates a total flow rate, a flow rate of the liquid components as well as a flow rate of the gaseous components from the measured values.

Le conteneur (1) est utilisé pour mélanger et mesurer le débit d'un fluide multiphase alimenté par un tube d'amenée (2). Les constituants liquides et gazeux du fluide sont séparés dans le conteneur (1) et collectés dans un espace liquide (14) et dans un espace gazeux (10). A l'interface entre l'espace gazeux (10) et l'espace liquide (14), il se forme un niveau liquide (14a) dont la hauteur réelle (Z) est mesurée au moyen d'un détecteur (13). Les fluides se trouvant dans le conteneur (1) sont repris à partir de ce conteneur, dans le sens de l'écoulement (20a) et, en même temps mélangés par l'intermédiaire d'un dispositif de prélèvement comprenant au moins un élément de soutirage (6) connecté à un autre élément de soutirage (8). L'élément de soutirage (6) est disposé verticalement par rapport au niveau liquide (14a) et présente des orifices (7) qui, pendant le fonctionnement normal du conteneur (1), sont situés partiellement au-dessous ou partiellement au-dessus du niveau liquide (14a). L'élément de soutirage (6) présente, dans la zone de l'orifice d'entrée (6a), un tube Venturi (9) destiné à mesurer le débit du constituant gazeux traversant l'orifice d'entrée (6a) pour s'écouler vers l'élément de soutirage (6). Dans la zone de l'espace gazeux (10), il est prévu un détecteur de pression (11) destiné à mesurer la pression du constituant gazeux. Un dispositif de traitement de signaux (22) détectant les valeurs mesurées calcule, à partir de ces valeurs, un débit global, un débit pour les constituants liquides ainsi qu'un débit pour les constituants gazeux.

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