US 9,809,482 B2
Method for treating mineral sludge by flocculation in-line then above ground
René Pich, Saint Etienne (FR)
Assigned to S.P.C.M. SA, Andrezieux Boutheon (FR)
Appl. No. 14/430,960
Filed by S.P.C.M. SA, Andrezieux Boutheon (FR)
PCT Filed Oct. 15, 2013, PCT No. PCT/FR2013/052461
§ 371(c)(1), (2) Date Mar. 25, 2015,
PCT Pub. No. WO2014/076383, PCT Pub. Date May 22, 2014.
Claims priority of application No. 12 60931 (FR), filed on Nov. 16, 2012.
Prior Publication US 2015/0239764 A1, Aug. 27, 2015
Int. Cl. C02F 1/52 (2006.01); B01D 21/01 (2006.01); E21B 21/06 (2006.01); B65G 5/00 (2006.01); E02B 8/06 (2006.01); B09C 1/08 (2006.01); C02F 11/14 (2006.01); F17D 1/14 (2006.01); C02F 1/56 (2006.01); C02F 1/00 (2006.01); B03D 3/00 (2006.01); B01D 21/24 (2006.01); C10G 1/04 (2006.01); E21B 21/00 (2006.01); B09C 1/00 (2006.01); B09B 1/00 (2006.01); C09K 8/588 (2006.01); C09K 8/02 (2006.01); E21B 43/34 (2006.01); E21B 43/40 (2006.01); F17D 1/08 (2006.01); F17D 3/16 (2006.01)
CPC C02F 11/14 (2013.01) [B01D 21/01 (2013.01); B65G 5/00 (2013.01); C02F 1/52 (2013.01); C02F 1/56 (2013.01); F17D 1/14 (2013.01); B09B 1/00 (2013.01); B09C 1/00 (2013.01); C10G 1/04 (2013.01); E21B 21/06 (2013.01); E21B 21/068 (2013.01); E21B 43/34 (2013.01); E21B 43/40 (2013.01); F17D 1/088 (2013.01); F17D 3/16 (2013.01)] 15 Claims
OG exemplary drawing
 
1. 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.