| 摘要 |
A pump/separator apparatus for pumping a viscous fluid mixture upwardly from an underground location and for carrying out at least partial separation of the mixture is described. The apparatus comprises a generally cylindrical housing having an intake at or near its lower end and an upper discharge end. One or more impellers (2) is mounted in the housing to rotate about a drive shaft 91), each impeller (2) being of upwardly diverging external shape and arranged to generate a spirally upwardly moving column of fluid which therefore induces inward flow of the mixture through the intake.
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