Separator for liquids containing impurities

A centrifugal separator apparatus for purifying liquids containing solid impurities, comprising:

• fluid passage means having an inlet for receiving raw liquid to be purified, and first and second outlets, the passage means having a longitudinal axis;
• a discharge conduit in the passage means connected to the first outlet;
• the passage means comprising a main separator conduit and the discharge conduit having an inlet end for receiving relatively clean liquid and which is separated from the separator conduit by a gap forming an inlet end for the second outlet for receiving solids laden liquid;
• stator means fixed in the main separator conduit for imparting an initial swirling axial movement to the raw liquid in the fluid passage means passing the stator means;
• and
• rotor means mounted for rotation in the main separator conduit, upstream of the discharge conduit inlet end, and downstream of the stator means, for rotating to impart a further swirling axial movement to the raw liquid in the main separator conduit downstream of the rotor means for causing solids in the raw liquid to migrate outwardly in the main separator conduit;
• relatively clean liquid entering the discharge conduit inlet end to exit the separator apparatus via the first outlet, and solids laden liquid passing the discharge conduit inlet end and exiting the separator apparatus via the second outlet.