| 摘要 |
<p>The invention relates to a filter element for the filtration of a suspension containing pollutants in which the suspension is arranged for a substantially horizontal flow direction through the filter bed. The filter element comprises at least one inlet chamber (2) for the suspension, one outlet chamber (3) for collecting a filtered solution and at least a filter bed (1), which is substantially vertically arranged between permeable walls and located between the inlet chamber (2) and outlet chamber (3) for filtering the pollutants from the suspension entering the filter bed (1) in the flow direction from the inlet chamber (2) and directing the filtered solution into the outlet chamber (3), the filter bed (1) including a granular filter media with particle sizes less than about 0.6mm. The filter also comprises means (6, 7, 8) for washing the granular filter media, said means communicating with said filter bed (1) to separate the pollutants from the granular filter media and return the granular filter media to the filter bed (1) and means for washing at least one of the filter walls and wherein the vertically arranged filter bed (1) is substantially flat and the filter element is so formed as to provide possibility of arranging several such elements in modules and that the depth of said bed is less than 12 cm in the flow direction.</p> |
