| 摘要 |
2121335 9308892 PCTABS00021 This invention relates to a method of, and apparatus for, separating contaminates from a base liquid and whereby the contaminated base liquid is passed through a pretreatment vessel before being passed to a conventional separator. In one described embodiment, the pretreatment vessel (11) is of generally cylindrical form arranged with its axis substantially vertical, base liquid to be de-contaminated is supplied into the mid-height regions of the vessel through a tangential device (16) to cause circulating flows within the vessel (11), and the vessel (11) includes an outlet (13a) in its top regions (13) for the release of light contaminates, an outlet (12a) in its lower regions for the release of heavy contaminates, and an outlet duct (30) in its mid-region, spaced from the inlet for releasing partially contaminated liquid from the vessel (11), for release into a conventional separator (26). Preferably the method includes the steps of introducing a first treatment material to the base liquid before, or as, the base liquid enters the vessel (11) and adding a second treatment material into the partially decontaminated base liquid to be directed to the conventional separator (26).
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