Liquid purification or separation – Processes – Separating
Patent
1987-01-28
1988-09-13
Sever, Frank
Liquid purification or separation
Processes
Separating
210791, 210108, 210196, 210386, 210411, B01D 2938
Patent
active
047707933
ABSTRACT:
In a slurry dewatering process, slurry is pumped into a porous tube at a sufficiently low velocity for laminar flow conditions to exist. The pressure is sufficiently high for liquid in the slurry to permeate outwardly through the tube wall and for solids in the slurry to be deposited in the form of an annular cake on the tube wall. The deposition of solids is controlled so that the cake thickness is substantially uniform throughout. When a predetermined thickness of cake has been deposited, the pressure inside the tube is decreased and the flow velocity is increased and the cake is dislodged from the tube wall in flake form and is conveyed downstream for collection on a screen or the like.
REFERENCES:
patent: 2861649 (1958-11-01), Junkman
patent: 3523077 (1970-08-01), Camirand et al.
patent: 4282097 (1981-08-01), Kuepper et al.
Buckley Christopher A.
Treffry-Goatley Kevin
Jackson Robert R.
Sever Frank
The Water Research Commission
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