Pollution separating and purifying apparatus for at least one fluid mixture

A pollution separating and purifying apparatus for at least one fluid mixture, the apparatus comprising:

• a stationary cylindrical body having a peripheral wall and an inlet member for admitting the fluid mixture to be treated;
• a rotor adapted to be rotated in a direction of rotation with respect to an axis of rotation, said rotor being mounted in said cylindrical body and comprises a stack of plates which extend radially from said axis of rotation towards the peripheral wall of said cylindrical body and which plates are provided with openings;
• an annular gap between a periphery of said plates and said peripheral wall of the cylindrical body;
• a means for generating a pressure drop in a top portion of said apparatus,
• a hopper means for collecting a heavy phase of said fluid mixture, said hopper means being connected to the cylindrical body beneath the rotor and being provided with forced evacuation means isolated from an outside of the apparatus;
• an extractor member for extracting a treated mixture, said extractor member being connected to the cylindrical body above the stack of plates;
• and
• a means for generating a first helical motion of the fluid mixture to be treated, said first helical motion driving the fluid mixture in the annular gap and being directed downwards, that is in a direction from the inlet chamber to the hopper means, and having a direction of rotation that is the same as the direction of rotation of the rotor,
• wherein the rotation of the rotor, with said pressure drop being in force, is adapted to generate a second helical motion of the fluid mixture to be treated, said second helical motion driving the fluid mixture through said openings of the plates of said stack of plates of the rotor and directly in contact with said plates, the second helical motion being directed upwards, that is in a direction from the hopper means to the extractor member and having a direction of rotation that is the same as the direction of rotation of the rotor, and
• wherein the inlet member is situated between the rotor and the extractor member, said inlet member comprising an annular chamber which is provided between an inside cylindrical wall and an outside wall and which has a top end in proximity with the extractor member that is closed and a bottom end in proximity with a top plate of the stack of plates, the inlet member further presenting an inlet for admitting the mixture to be treated into said annular chamber, and a central column having open top and bottom ends, said central column extending above and over said stack of plates of the rotor.