Centrifugal reverse-osmosis desalination unit incorporating an a

Details Centrifugal reverse-osmosis desalination unit incorporating an a Centrifugal reverse-osmosis desalination unit incorporating an a

1997-05-19

2000-10-17

Walker, W. L.

Liquid purification or separation

Casing divided by membrane into sections having inlet

Membrane movement during purification

21032183, B01D 6316

Patent

active

061326135

ABSTRACT:
This invention relates to an apparatus for separating an original feed solution such as seawater into a product solution of decreased concentration (relatively fresh water) and an exhaust solution of increased concentration. The apparatus includes an annular reverse osmosis membrane means, contained in an annular pressure vessel that is housed in a rotor assembly. The rotor is arranged to spin on an axle and is located within an evacuated shroud. The apparatus further includes supply means for supplying the original feed solution to the reverse osmosis membrane, exhaust means at an outermost radius of the reverse osmosis membrane for removing the exhaust solution from the reverse osmosis membrane, product removal means at an innermost radius of the reverse osmosis membrane for removing the product solution from the reverse osmosis membrane and means for creating a pressure differential across the reverse osmosis membrane to separate the original feed solution into the product solution and the exhaust solution. The supply means and the exhaust means are relatively axially and radially spaced such that the feed solution travels along a combined radial and axial flow-path.

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