C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/63
C02F 1/00 (2006.01) B01D 33/04 (2006.01) B01D 37/03 (2006.01) C02F 11/12 (2006.01)
Patent
CA 1106510
ABSTRACT OF THE DISCLOSURE An apparatus for thickening sludge is disclosed herein. The apparatus includes an endless band of mesh material which, in one section of the apparatus, has a generally horizontal run extending between spaced guides. The horizontal run is supported between the guides on a structure which permits liquid to drain freely through the band. A structure is provided for introducing sludge to be treated into the apparatus, together with means for dosing the sludge to be treated with a cationic polyelectro- lyte. A tank for receiving and holding the dosed sludge for a sufficient period of time to allow development of a flock structure is also provided. A supply means is also provided for supplying sludge from the tank to the upper surface of the band of mesh material at the start of the horizontal run in such a manner that the floc structure is retained. The supply means comprises a weir constituting the outlet of the tank and a chute of shallow gradient extending from the weir to the start of the horizontal run whereby to deposit the sludge on the band without substantial forward velocity. A drive means is also provided for driving the band so that the sludge is conveyed through the run without destroying the floc structure of the sludge and a scraper is provided for removing thickened sludge from the surface of the band after the horizontal run.
318060
Fetherstonhaugh & Co.
Simon-Hartley Limited
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