Methods and devices for improved aeration from...

B - Operations – Transporting – 01 – F

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B01F 3/04 (2006.01) C02F 3/02 (2006.01) C02F 3/20 (2006.01)

Patent

CA 2651307

Submerged gas diffuser assemblies configured to aerate liquid suspensions in reservoirs or deep shafts with enhanced aeration contact patterns and adjustable aeration rates. Aeration contact patterns and rates are varied by the adjusting the spatial configuration of gas permeable membranes, altering the fluid flow patterns around the membranes, manipulating trans-membrane pressures across membranes, varying the sequence of aeration of liquid within the fluid flow patterns, expanding the membrane surface area, and/or by selectively occluding certain portions of membrane surface area of the membrane assemblies. The membrane assemblies are designed to prevent, control, or mitigate membrane fouling and hydro lockup.

La présente invention concerne des ensembles de diffusion de gaz immergé conçus pour aérer des suspensions liquides dans des réservoirs ou des cuves profondes, qui présentent des schémas de contact d'aération et des taux d'aération réglables renforcés. Les schémas de contact d'aération et les taux d'aération sont modifiés en réglant la configuration spatiale des membranes perméables au gaz, en altérant les schémas d'écoulement du fluide autour des membranes, en manipulant les pressions transmembranaires à travers les membranes, en variant la séquence d'aération du liquide dans les schémas d'écoulement du fluide, en étendant la surface de la membrane et/ou en obturant sélectivement certaines parties de la surface membranaire des ensembles de membrane. Les ensembles de membrane sont conçus pour empêcher, réguler ou limiter l'encrassement des membranes et un verrouillage hydraulique.

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