| 摘要 |
The invention relates to a method for extracting a liquid additive (8) from an interior space (1) of a tank (2) at an extraction point (3). In step a), the liquid additive (8) is filtered by means of at least one filter (4) which covers the extraction point (3) and which separates the latter from the interior space (1) of the tank (2) and through which the liquid additive (8) flows, wherein contaminants of the liquid additive (8) are deposited on a surface (5) of the filter (4), and liquid additive (8) is extracted from the tank (2) at the extraction point (3). In step b), at least one porous filter cake (6) is formed from contaminants (7) of the liquid additive (8) on the surface (5) of the filter. In step c), the liquid additive (8) is filtered by means of the at least one porous filter cake (6), wherein contaminants (7) of the liquid additive (8) are deposited in the filter cake (6), and liquid additive (8) is extracted from the tank (2) at the extraction point (3). |
