Apparatus for separating solid particles from a liquid
OwnerHans Stedfeldtinventor
Life of this patent
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Abstract
An improved method for separating solid particles from liquids, such as dewatering and thickening of sludge collected in a container (1), involves the use of at least one drainage unit (9) having doubled screened jacket walls (25, 26) defining a dewatering chamber (10). The liquid relieved of solids within the chamber is subjected to a turbulent motion acting against said screened jacket walls for obstruction of the solids deposition at the wall surfaces of the chamber facing the sludge in the container. The turbulent motion is obtained by a forced fluid F introduced in the chamber through one or more tubes (30, 31). The fluid may favourably be in form of compressed air or water returned from the reject system (14, 16).
Claims11
An improved system for dewatering sludge by separating and draining liquid from solid suspensions in a container, comprising:
- a drainage unit in said container, said drainage unit including double screened jacket walls defining therebetween an annular dewatering chamber, means for moving the liquid from said container through said jacket walls into said annular dewatering chamber to separate the liquid from the solid suspensions leaving the thickened and dewatered sludge containing the solid suspensions in said container;
- means for imparting turbulence to the separated liquid, said turbulence imparting means being arranged within said annular dewatering chamber of said drainage unit to prevent deposition of solids on said jacket walls of said annular dewatering chamber while the liquid is being separated therefrom;
- means for draining the separated liquid collected in said annular dewatering chamber;
- and
- means for removing the dewatered and thickened sludge remaining in the container outside of said drainage unit.
Dependencies are inferred from the claim text.