Centrifugal separator for cleaning gas

A centrifugal separator for cleaning gas containing contaminants comprising:

• a stationary casing, enclosing a separation space through which a gas flow is permitted, said stationary casing comprising a surrounding side wall, an upper end wall and a lower end wall;
• a gas inlet extending through the stationary casing and permitting supply of the gas to be cleaned;
• a rotating member comprising a plurality of separation members arranged in said separation space and being arranged to rotate around an axis of rotation;
• a gas outlet arranged in the stationary casing and configured to permit discharge of cleaned gas and comprising an outlet opening through a wall of the stationary casing;
• a drainage outlet arranged in a lower portion of the stationary casing and configured to permit discharge of liquid contaminants separated from the gas to be cleaned;
• a drive member for rotating the rotating member;
• at least one guiding vane arranged for guiding separated liquid impurities on an inner surface of the lower end wall from a radial outer position to the drainage outlet;
• and
• a radial disc element arranged on top of the at least one guiding vane,
• wherein the radial disc element extends radially in the separation space to a position that is radially inwards from the surrounding side wall, thereby forming an annular channel for separated liquid impurities at an inner surface of the surrounding side wall.