| 摘要 |
A vacuum filter includes a cylindrical filter drum (12) having both a perforate section (14) and an imperforate section (16). The drum is positioned in a tank (20) so that the imperforate section is oriented upwardly therein. A level controller is provided to maintain the level of contaminated fluid below the top of the imperforate section but above the perforate section. A filter belt (54) wrapped around the filter drum is repositioned by rotating the drum when the differential pressure between the interior and exterior of the drum reaches a predetermined value. The inlet ends (35) of the suction pipes (34) are continuously positioned at the lowest point of the drum so that the pump does not lose suction when the drum is rotated thereby facilitating continuous filtration of the contaminated fluid through the vacuum filter.
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