Liquid purification or separation – Casing divided by membrane into sections having inlet – Membrane movement during purification
Patent
1993-10-12
1995-11-07
Spear, Frank
Liquid purification or separation
Casing divided by membrane into sections having inlet
Membrane movement during purification
2104161, B01D 6122
Patent
active
054645344
ABSTRACT:
A system for separating at least one constituent from a liquid suspension such as blood induces high velocity flow by viscous drag about the circumference of a spinner having a filtration membrane with pore sized selected for the desired constituent. The high velocity circumferential flow is bounded by a spaced apart shear wall, with a spacing selected relative to the diameter of the spinner and its rotational velocity, also with respect to the viscosity of the suspension, to establish a flow within the shear gap, as substantial centrifugal forces are exerted upon the suspension. Under these conditions, filtrate in contact with the membrane is replenished and filtrate passes through the membrane with minimal adverse effects from deposition and concentration polarization, and with high efficiency because of high shear levels that are maintained. The filtrate is collected within the interior of the spinner in a conduit system and passed to an outlet orifice.
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McLaughlin William F.
Spear Frank
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