| 摘要 |
A centrifugal extractor or contactor comprises a substantially square tank divided by superposed annular partitions into a lower space, an intermediate space, and an upper space. The rotating bowl of the machine carries on its underside a suction chamber which communicates with the bowl through perforations provided in the bottom thereof. This chamber has a lower central opening equipped with inwardly projecting rotary vanes which project the liquids from the tank into the suction chamber. An axial vertical rod extends upwardly from the bottom of the tank, passes between the rotary vanes and carries above same outwardly extending stationary vanes which re-direct upwardly and outwardly the liquid stream issuing from the rotary vanes. The liquid to be treated and the treating liquid are both supplied to the lower space of the tank. They are mixed by paddles carried by the suction chamber, sucked by the vanes and forced into the bowl wherein they are separated by centrifugal action and discharged into the upper and the intermediate space. Wells provided in two opposed corners of the tank direct the separated liquids respectively into the lower space of the next tank and of the preceding tank in a succession of extractors operating in the counter-current mode.
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