Improvements in feedwells

B - Operations – Transporting – 01 – D

Patent

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B01D 21/24 (2006.01)

Patent

CA 2724169

The invention provides several improvements in feedwells, one of which being a feedwell (100) comprising a mixing zone (49) for dissipating the kinetic energy of a fluid comprising pulp, a settling zone (50) for promoting flocculation of the pulp and at least one inclined deflecting element (101) for at least partially separating the mixing zone from the settling zone. Other improvements include a shelf (3) at least partially defining an inclined path (4) for removing material from the shelf into a feedwell chamber; at least two outlets (111, 112) arranged in a substantially concentric relationship with respect to each other; a portion (123) of a second conduit (121) varies in its cross-sectional size and/or shape so as to connect a feed inlet (110) to a first conduit (120); and a partition (133) for partially separating an outer mixing zone (131) and an inner settling zone (132).

La présente invention concerne plusieurs améliorations de puits dalimentation, lune dentre elles étant un puits dalimentation (100) qui comprend une zone de mélange (49) destinée à dissiper lénergie cinétique dune pulpe comprenant un fluide, une zone de sédimentation (50) destinée à promouvoir la floculation de la pulpe et au moins un élément de déviation incliné (101) pour séparer au moins partiellement la zone de mélange de la zone de sédimentation. Dautres améliorations comprennent une étagère (3) définissant au moins partiellement une voie inclinée (4) pour éliminer le matériau de létagère dans une chambre de puits dalimentation ; au moins deux orifices de sortie (111, 112) agencés en une relation sensiblement concentrique lun par rapport à lautre ; une partie (123) dun deuxième puits (121) a une taille en coupe transversale et/ou une forme variables de manière à connecter un orifice dentrée dalimentation (110) à un premier conduit (120) ; et une séparation (133) destinée à séparer partiellement une zone de mélange extérieure (131) et une zone de sédimentation intérieure (132).

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