| 摘要 |
SEPARATOR There is provided a low energy gravitational separator for separating solid matter from a liquid mixture carrying the solid matter comprising: (a) a vessel having a cylindrical outer wall and a base at one end, (b) a body which is provided within the vessel and which defines with the base an annular opening spaced from the outer wall, (c) an annular dip plate in an upper region of the vessel and spaced from the outer wall of the vessel for stabilising flow patterns in the vessel, (d) a vessel inlet formed as an opening in the outer wall of the vessel for introducing the liquid mixture into the vessel, (e) an outlet in communication with an upper region of the vessel for removing from the vessel a treated liquid, (f) a solids collection region centrally disposed of the base for collecting solid matter separated from the liquid mixture, and (g) an inlet reservoir in communication with the vessel via the said vessel inlet, which inlet constitutes a drainage outlet from the inlet reservoir, the inlet reservoir being shaped to direct liquid from the reservoir through the drainage outlet into the vessel in a generally tangential direction thereby to promote a circulating flow of the liquid mixture within the vessel; the arrangement of the components of the separator being such that, in use with a circulating flow of liquid and solid matter within the vessel which is such that any separation of the solid component of the liquid in the vessel is brought about primarily by gravity, there is created a stabilised shear zone in the circulating liquid between an outer, relatively fast circulating region and an inner, relatively slowly circulating region and there is caused an inward sweeping effect of solids accumulated at the base of the vessel towards the said annular opening.
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