| 摘要 |
The invention relates to a method for extracting solids ( 23; 123 ) from a suspension ( 22; 122 ) containing the solids ( 23; 123 ) and suspension liquid ( 32; 132 ) in a continuously or virtually continuously operating filter device ( 10; 110 ) using a filtering material ( 26; 126 ), on the one side of which, the high-pressure side ( 30; 130 ), a higher pressure prevails than on its other side, the low-pressure side ( 42; 142 ), and which passes successively through a plurality of working zones (I-V; I-IV) of the filter device ( 10; 110 ) in a working direction (U), the suspension ( 22; 122 ) being supplied to the filtering material ( 26; 126 ) on its high-pressure side ( 30; 130 ) in a first working zone (I) and being filtered, the suspension liquid ( 22; 122 ) flowing through the filtering material ( 26; 126 ) on account of the difference in pressure between the high-pressure side ( 30; 130 ) and the low-pressure side ( 42; 142 ) while at least some of the solids ( 23; 123 ) are deposited on the filtering material ( 26; 126 ). As claimed in the invention, the solids ( 23; 123 ) which are deposited on the filtering material ( 26; 126 ) are resuspended in a washing liquid ( 50; 150 ), and the new suspension (resuspension) ( 53; 153 ) thus formed is filtered again in a second working zone (II) of the filter device ( 10; 110 ), which zone is arranged downstream of the first working zone (I) in the working direction (U).
|
