Comminuting device

A comminuting device for solids-conducting liquids comprising:

• a housing with an inlet opening, an outlet opening and a housing interior space which extends from the inlet opening to the outlet opening;
• a first comminuting shaft extending through the housing interior space and arranged for rotation about a first comminuting shaft axis, to which a multiplicity of first comminuting cutting elements which are spaced apart axially along the first comminuting shaft axis are fastened;
• a second comminuting shaft extending through the housing interior space and arranged for rotation about a second comminuting shaft axis, to which a multiplicity of second comminuting cutting elements which are spaced apart axially along the second comminuting shaft axis are fastened, wherein the first and second comminuting shaft axis run parallel to one another and are spaced apart from one another;
• a drive device for driving the first and second comminuting shafts in a rotational movement;
• a comminuting flow path extending through the interior space from the inlet opening around the comminuting shaft to the outlet opening;
• a first screen device arranged in the housing interior space adjacently with respect to the first comminuting shaft with a first screen wall having a multiplicity of screen wall openings and a first evacuating device for removing blockages from the screen wall openings, the first screen device and the first evacuating device being movable relative to one another;
• and
• a second screen device arranged in the housing interior space adjacently with respect to the second comminuting shaft with a second screen wall having a multiplicity of screen wall openings and a second evacuating device for removing blockages from the screen wall openings, the second screen device and the second evacuating device being movable relative to one another;
• and
• a bypass flow path running in parallel to the comminuting flow path and extending through the screen wall openings from the inlet opening to the outlet opening;
• wherein the first and second evacuating devices are formed by at least one brush element with a multiplicity of brush hairs, the screen wall openings of each of the first screen wall or second screen wall and the first brush element being movable relative to one another, respectively, and the brush hairs engaging at least partially into the screen wall openings during relative movement of the first brush element with respect to the first screen wall or the second screen wall;
• wherein the first screen device is configured as a screen drum about a screen drum axis, the screen drum having a circumference on which the first screen wall is arranged;
• wherein the first screen wall extends, starting from the region which adjoins the first comminuting shaft,
• over an inlet circumferential angle which defines the circumferential portion of the screen drum, via which fluid which flows in through the inlet opening can flow through the first screen wall into the screen drum, and the first screen wall is divided into a plurality of screen wall segments, of which at least one screen wall segment extends over a segment circumferential angle about the screen drum axis which is less than or equal to the inlet circumferential angle, or
• over an outlet circumferential angle which defines the circumferential portion of the screen drum, via which fluid which flows to the outlet opening can flow out of the screen drum through the first screen wall, and the first screen wall is divided into a plurality of screen wall segments, of which at least one screen wall segment extends over a segment circumferential angle about the screen drum axis which is less than or equal to the outlet circumferential angle;
• and
• wherein the screen drum has a screen drum frame to which the screen wall segments are fastened, and in that the at least one screen wall segment is fastened releasably to the screen drum frame and can be unfastened radially to the outside in relation to the screen drum axis.

A comminuting device for solids-conducting liquids comprising:

• a housing with an inlet opening, an outlet opening and a housing interior space which extends from the inlet opening to the outlet opening;
• a first comminuting shaft extending through the housing interior space and arranged for rotation about a first comminuting shaft axis, to which a multiplicity of first comminuting cutting elements which are spaced apart axially along the first comminuting shaft axis are fastened;
• a drive device for driving the first comminuting shaft in a rotational movement;
• a comminuting flow path extending through the interior space from the inlet opening around the comminuting shaft to the outlet opening;
• a first screen device arranged in the housing interior space adjacently with respect to the first comminuting shaft with a first screen wall having a multiplicity of screen wall openings and a first evacuating device for removing blockages from the screen wall openings, the first screen device and the first evacuating device being movable relative to one another;
• and
• a bypass flow path running in parallel to the comminuting flow path and extending through the screen wall openings from the inlet opening to the outlet opening;
• wherein the first evacuating device is formed by at least one first brush element with a multiplicity of brush hairs, the first screen wall and the first brush element being movable relative to one another, and the brush hairs engaging at least partially into the screen wall openings during relative movement of the first brush element with respect to the first screen wall;
• wherein the first screen device is configured as a screen drum about a screen drum axis, the screen drum having a circumference on which the first screen wall is arranged and the screen drum comprising a plurality of screen wall segments;
• wherein the screen drum is mounted in the housing by means of two opposed axle stubs such that the screen drum can be rotated about the screen drum axis, the axle stubs are accessed by removal of one of the plurality of screen wall segments, and the axle stubs may be dismantled from the interior space of the screen drum;
• wherein the first screen wall extends, starting from the region which adjoins the first comminuting shaft,
• over an inlet circumferential angle which defines the circumferential portion of the screen drum, via which fluid which flows in through the inlet opening can flow through the first screen wall into the screen drum, and the first screen wall is divided into a plurality of screen wall segments, of which at least one screen wall segment extends over a segment circumferential angle about the screen drum axis which is less than or equal to the inlet circumferential angle, or
• over an outlet circumferential angle which defines the circumferential portion of the screen drum, via which fluid which flows to the outlet opening can flow out of the screen drum through the first screen wall, and the first screen wall is divided into a plurality of screen wall segments, of which at least one screen wall segment extends over a segment circumferential angle about the screen drum axis which is less than or equal to the outlet circumferential angle;
• and
• wherein the screen drum has a screen drum frame to which the screen wall segments are fastened, and in that the at least one screen wall segment is fastened releasably to the screen drum frame and can be unfastened radially to the outside in relation to the screen drum axis.