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US 4,925,557 AGranted
Multi-purpose rotating membrane filter
OwnerWalter F. Ahlberg, Jr., Joseph F. Longinventors
Life of this patent
Estimating the term…
Abstract
A multi-purpose rotating membrane filter unit wherein the central portion of hollow filter discs covered with controlled pore size membranes communicate with the interior of the hollow rotating mounting shaft with the membrane surface of the rotating disc being kept clean by speed of rotation and, in some cases intermittent back flushing, and with filtrate draw off thru the hollow rotating mounting shaft.
Claims9
A Multi-Purpose Rotating Membrane Filter Unit comprising:
- (a) a closed cylindrical body with an upper head and a lower mounting means;
- (b) a rotatable hollow shaft in said closed cylindrical body with sealing means in said upper head and said lower mounting means;
- (c) a power drive means to rotate said rotatable hollow shaft;
- (d) a plurality of membrane-covered hollow disc means mounted on said rotatable hollow shaft with the interior of said membrane-covered hollow disc means communicating with the interior of said rotatable hollow shaft;
- (e) a minimum of one vertical vent pipe through a doughnut shaped hub of each of said plurality of membrane-covered hollow disc means;
- (f) an exterior feed means to provide multiple feed points through a vertical axis of said closed cylindrical body;
- (g) means whereby materials may be withdrawn through said upper head and through a lower portion of said closed cylindrical body;
- (h) means whereby material may be withdrawn from the interior of said rotatable hollow shaft;
- (i) bearing support means in said closed cylindrical body for said rotatable hollow shaft.
6 more elements
A Multi-Purpose Rotating Membrane Filter Unit comprising:
- (a) a rigidly mounted cylindrical body;
- (b) a rotatable hollow shaft means in said rigidly mounted cylindrical body;
- p1 (c) a plurality of controlled pore size membrane-covered hollow disc means mounted on said rotatable hollow shaft means with openings in said rotatable hollow shaft means communicating with an interior of said controlled pore size membrane-covered hollow disc means;
- (d) a first draw-off means in said rigidly mounted cylindrical body whereby material may be continuously removed from the upper part of said rigidly mounted cylindrical body;
- (e) a second draw-off means in said rigidly mounted cylindrical body whereby material may be removed from a lower part of said rigidly mounted cylindrical body;
- (f) a third draw-off means in said rigidly mounted cylindrical body whereby filtrate may be continuously removed from the interior of said rotatable hollow shaft means;
- (g) a back pulse pump means connected with said third draw-off means wherein said filtrate may be periodically pressured to backflow through said controlled pore size membrane-covered hollow disc means,
- (h) a feed manifold mounted on said rigidly mounted cylindrical body with exit openings from said feed manifold providing an inlet feed between each pair of said plurality of controlled pore size membrane-covered hollow disc means.
5 more elements
Dependencies are inferred from the claim text.