Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1996-07-05
1998-06-02
Hruskoci, Peter A.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210727, 210801, 23313R, C02F 152
Patent
active
057594112
ABSTRACT:
A horizontally-mounted, rotatable drum for mixing chemical additives with an aqueous suspension in order to promote agglomeration of suspended solids and for simultaneously separating water from them. With the drum, slurries of mining silt, clay, sludge and the like already partially dewatered to between about 50% and 60% moisture content can be further dewatered; reductions to 40% moisture content have been obtained. Supplied as a wet slurry to the drum through a hollow tube which also serves as an axle, the slurry is diverted, through a tubular branch fluidly connected to the tube, towards a vertical wall forming one end of the drum. Fed at a rate of between 200 and 300 gallons per minute, the slurry forcefully impinges against the vertical wall, simultaneously subjecting agglomerated particles in the slurry to high shear forces and freeing water. Downstream, before each of two spaced apart, annular retaining rings affixed to the drum, the slurry tends to pool. There chemical additives injected at strategic points promote further agglomeration. Slowed in their travel by the rings as well as by paddles attached to the drum sidewall, the suspended particles grow. Upon reaching the paddles, the solids in the suspension are sufficiently agglomerated so that the paddles can lift them upwardly while simultaneously water drains away. Ultimately, water and solids flow in two distinct streams from the open end of the rotating drum.
REFERENCES:
patent: 4101421 (1978-07-01), Hultsch
patent: 4127388 (1978-11-01), Maczko et al.
patent: 4137029 (1979-01-01), Brooks
patent: 4622152 (1986-11-01), Resing et al.
patent: 4816167 (1989-03-01), Vanderslice
patent: 5037286 (1991-08-01), Roberts
patent: 5094604 (1992-03-01), Chavez et al.
Hruskoci Peter A.
Leon Harry I.
Morrison Betsey J.
Steadman Vivian L.
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