Method and separator for cyclonic separation of a fluid mixture

B - Operations – Transporting – 04 – C

Patent

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Details

B04C 5/14 (2006.01) B04C 5/181 (2006.01)

Patent

CA 2558060

A method for cyclonic separation of gaseous and liquid fractions from a multiphase fluid mixture comprises: providing a cyclonic separation vessel (1) having a bottom section (4), a top section (3) and a tubular mid~section (2), which is co-axial to a central axis (5); injecting the multiphase fluid mixture into the vessel via an inlet conduit (6) which has a substantially tangential orientation relative to said central axis (5); inducing the fluid mixture to swirl within said tubular mid-section (2) of the vessel at such a speed that liquid and gaseous fractions are separated by cyclonic separation and gravity forces induce the liquid fraction to drop to the bottom section (4) of the vessel; - removing the gaseous fraction from the interior of the top section of the vessel via a gas outlet conduit (8) which has an entrance opening which is located at or near the central axis (5); removing the liquid fraction from the interior of the bottom section (4) of the vessel via a plurality of liquid outlet openings (11) that are located at different vertical levels and through which liquid is discharged into a liquid outlet conduit (10) such that liquid components with different densities are mixed into a substantially homogeneous liquid fraction and the formation of high density and low density liquid slugs in said conduit (10) is mitigated.

L'invention concerne un procédé de séparation cyclonique de fractions gazeuses et liquides dans un mélange fluide multiphasique qui consiste à: fournir une cuve de séparation cyclonique (1) présentant une section inférieure (4), une section supérieure (3) et une section moyenne tubulaire (2), laquelle est coaxiale à un axe central (5); injecter le mélange fluide multiphasique dans la cuve à travers un conduit d'entrée (6), dont l'orientation est sensiblement tangentielle par rapport à l'axe central (5); amener le mélange fluide à tourbillonner dans la section moyenne tubulaire (2) de la cuve à une vitesse telle que les fractions liquides et gazeuses se dissocient par séparation cyclonique et que la pesanteur entraîne la chute de la fraction liquide dans la section inférieure (4) de la cuve; éliminer la fraction gazeuse de l'intérieur de la section supérieure de la cuve à travers un conduit de sortie de gaz (8) pourvu d'un orifice d'entrée sur ou à proximité de l'axe central (5); et enfin, éliminer la fraction liquide de l'intérieur de la section inférieure (4) de la cuve par une pluralité d'orifices de sortie de liquide (11) situés à différents niveaux verticaux et à travers lesquels le liquide est déchargé dans un conduit (10) de sortie de liquide pour amener les composants liquides de densités différentes à se mélanger et à former une fraction liquide sensiblement homogène. La formation de bouchons liquides de densité faible et de densité élevée dans ledit conduit (10) est atténuée.

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