System and method for mixing high viscous liquids with gas

Details System and method for mixing high viscous liquids with gas System and method for mixing high viscous liquids with gas

C - Chemistry, Metallurgy

02

F

C02F 3/12 (2006.01) B01F 3/04 (2006.01) B01F 7/00 (2006.01) B01F 13/00 (2006.01) C02F 3/20 (2006.01)

Patent

CA 2670028

A system and method for mixing high viscous liquids with gas is provided. The disclosed embodiments include a reactor or mixing vessel (11) having a draft tube (12) disposed therein, a gas injection subsystem adapted to inject gas into the reactor or mixing vessel proximate the entrance of the (19) draft tube. The embodiments also include an agitator (16) disposed within the draft tube which makes the draft tube the primary site for the gas-liquid mixing. In particular, the agitator is adapted to create gas bubbles having an average diameter between about 0.3 mm and 3.0 mm which are then ejected into the reactor or mixing vessel. The mass transfer efficiency associated with the present system and method is enhanced from the combined effect of gas dissolution into the high viscous liquid within the draft tube and greater bubble residence time within the high viscous liquid.

La présente invention concerne un système et un procédé de mélange de liquides fortement visqueux et de gaz. Les modes de réalisation décrits incluent un réacteur, ou cuve de mélange, dans lequel est disposé un tube d'aspiration, un sous-système d'injection de gaz étant adapté pour injecter du gaz dans le réacteur ou cuve de mélange proche de l'entrée du tube d'aspiration. Les modes de réalisation incluent aussi un agitateur dispos2 à l'intérieur du tube d'aspiration ce qui fait du tube d'aspiration le site principal du mélange gaz-liquide. L'agitateur est adapté en particulier pour créer des bulles de gaz ayant un diamètre moyen de 0,3 mm à 3,0 mm qui sont ensuite éjectées à l'intérieur du réacteur ou cuve de mélange. L'efficacité du transfert de masse associée aux présents système et procédé est augmentée par l'effet combiné de la dissolution du gaz dans le liquide fortement visqueux à l'intérieur du tube d'aspiration et du temps de séjour supérieur des bulles à l'intérieur du liquide fortement visqueux.

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