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US 5,207,907 AGranted
Compact apparatus for treating sludge by draining and pressing
AssigneeDegremont
InventorsLuc DeLons, Joseph Andrieu, Patrick Bele
Life of this patent
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Abstract
Apparatus for dehydrating sludge originating from water purification stations, comprising a draining grid part positioned above a pressing-belt filter part, and a device for washing the grid wherein the device is positioned above the grid, so as to limit the drop height of the flocculated sludge between the grid and the belt, thus avoiding deflocculation of the sludge between the thickening stage and the dehydration stage, the washing of the grid being performed concurrently with the movement of the sludge on the grid.
Claims6
Apparatus for dehydrating sludge originating from a water purification station comprising:
- a draining grid for draining water from said sludge, said grid extending longitudinally between a sludge inlet portion and a thickened sludge outlet portion;
- scraper means for moving sludge along said grid from said inlet portion to said outlet portion;
- a pressing belt assembly for receiving drained sludge from said grid and pressing said drained sludge to form a thickened sludge, said belt assembly being positioned below said draining grid;
- and,
- a washing assembly for washing said grid with water concurrently with movement of sludge along said grid, said washing assembly being positioned above said grid and comprising a movable wash rack, a plurality of nozzles mounted on said wash rack for spraying water downwardly on said grid, and means for moving said wash rack longitudinally with respect to said grid while spraying water on said grid.
2 more elements
Dependencies are inferred from the claim text.