| 摘要 |
A filtering assembly for removing particles from a liquid is positioned coaxially within a vertical, pressure-tight housing 11 having a tangential inlet 21 at an upper end and an outlet 24 at a bottom end thereof. The filtering assembly includes a filter bag 13 positioned on the exterior surface of a perforated cylinder 14. Untreated liquid from the inlet is filtered as it flows radially inward through the filter assembly. A wash-down device 28 is position at an upper end of the housing for removing solids that have built up on the exterior surface of the filter bag. A controller initiates a wash-down of the filter bag upon detecting a predetermined pressure differential across the filter assembly. After closing the inlet and outlet, the controller opens a vacuum-break valve D causing the filter bag to pulse and thereby initially dislodging entrapped solid particles for easy wash-down.
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