| 摘要 |
An apparatus serves for removing fine material to be screened from waste water. The apparatus includes a sieve grate ( 6 ) and a detaching device ( 16 ). The sieve grate ( 6 ) is cylindrical, and it is rotatingly driven. The sieve grate ( 6 ) allows for waste water to flow from its interior towards its exterior. The sieve grate ( 6 ) includes a supporting body ( 13 ) and a mesh sieve ( 7 ). The supporting body ( 13 ) is located at the exterior of the sieve grate ( 6 ). The supporting body ( 13 ) is made of a perforated sheet metal including comparatively large openings ( 37 ). The supporting body ( 13 ) provides for resistance and stability of the sieve grate ( 6 ). The mesh sieve ( 7 ) is located in the interior of the sieve grate ( 6 ). The mesh sieve ( 7 ) forms a separation surface ( 14 ) for the material to be screened. The mesh sieve ( 7 ) includes meshes of a comparatively small size. The mesh sieve ( 7 ) is fixedly connected to the supporting body ( 13 ). The detaching device ( 16 ) is arranged outside of the sieve grate ( 6 ). The detaching device ( 16 ) includes a plurality of nozzles ( 22 ). The nozzles ( 22 ) are designed and arranged to spray water from outside of the sieve grate ( 6 ) towards the interior of the sieve grate ( 6 ) in a way to detach material to be screened adhering to the inner surface of the sieve grate ( 6 ).
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