Filter device

A filter device for filtering out a solid substance from a solid-liquid-mixture, the filter device comprising:

• a bearing shaft extends along a rotation axis, the bearing shaft having an intermediate connection channel extending along a rotation axis of the bearing shaft from one end to the other end of the bearing shaft;
• a rotation body is attached to the bearing shaft and is supported by the bearing shaft to be rotatable about the rotation axis;
• a single filter cell on the rotation body and the single filter cell includes:
• a filter structure attached to the rotation body for filtering out the solid substance from the solid-liquid-mixture, allowing a liquid of the solid-liquid-mixture to pass therethrough from a filter structure inlet side to a filter structure outlet side, and
• a connection channel is formed in the rotation body and extends from the filter structure outlet side to an outlet opening formed to be adjoining to the bearing shaft and via which the connection channel is permanently connected with the intermediate connection channel, which is formed in an axial center of the bearing shaft, independent from a rotation position of the rotation body;
• a liquid discharge line which is at least one of connected to the intermediate connection channel and is formed by the intermediate connection channel;
• a plurality of branch-off lines branched-off from the liquid discharge line;
• and
• a control device having a valve assembly, by which the branch-off lines are connectable with the liquid discharge line in a controlled manner based on the rotation position of the rotation body, and
• wherein the rotation body includes a solid circumferential surface from a first edge of the filter cell to an opposing second edge of the filter cell, and
• the filter structure inlet side is on an outside of the rotation body.