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US 9,809,482 B2Granted
Method for treating mineral sludge by flocculation in-line then above ground
AssigneeS.P.C.M. SA
InventorRené Pich
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Abstract
The improved process for conditioning sludges by flocculation, according to which: the sludge to be treated is transported in a pipeline, at least one flocculating agent is inserted in the pipeline that transports the sludge to be treated, the sludge is then mixed with the said flocculating agent. finally, the mixture is transported and then discharged in a natural or an artificial excavation at a distance from the bottom of the said excavation that is less than its depth.
Claims15
A process for conditioning sludge by flocculation, said process comprising:
- transporting the sludge to be treated in a pipeline with an outlet,
- inserting at least one flocculating agent in the pipeline that transports the sludge to be treated,
- mixing the sludge with the said flocculating agent, thereby forming a sludge-flocculant mixture in the pipeline, and
- transporting and then discharging the sludge-flocculant mixture in a natural or an artificial excavation at a distance from the bottom of the natural or artificial excavation lesser than that of its depth, wherein said discharging the sludge-flocculant mixture comprises discharging the sludge-flocculant mixture at a first altitude, and wherein the first altitude is less than the altitude of a level of sludge-flocculant mixture obtained after said discharging, such that as the natural or artificial excavation fills up, the pipeline is gradually immersed, thus forming a boiling crater, where boils at the surface of the boiling crater allow flocs to escape onto a rim of the boiling crater, thereby providing for improved flocculation efficiency.
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Dependencies are inferred from the claim text.