Separator til separation af en tofase-væskeblanding i let væske og tung væske

The separator (10) has a twisted inlet imparting spin to the fluids. The separator (10) removes a small proportion of light fluid from a larger proportion of a heavier fluid which may also incorporate some sludge, from a mixture of e.g. oil and water. The separator has a separator basin (12) for fluid which is retained to a minimum depth by an overflow pipe (18). The basin also has an inlet pipe (14), and outlet pipe (16) and a tubular light fluid collector (20). The mixture enters through the inlet pipe and is released into the collector where the heavier fluids and sludge descend to the lower sector (26) within the separation basin. A separation panel (30) within the collector curves from the collector wall (22) to the collector axis (24) to form a spiral intermediate space (36), and an outer intermediate space (38) against the collector wall. The wall and separation panel each have an upper edge (40, 42) which is at least in part higher than the lowest fluid level. The inlet pipe funnels tangentially through the collector wall into the outer intermediate space at ca. the same height.