Liquid purification or separation – Filter – With movable means to compress medium
Patent
1998-01-20
1998-12-22
Lithgow, Thomas M.
Liquid purification or separation
Filter
With movable means to compress medium
210351, 210385, 210388, 210405, 100116, B01D 3329, B01D 3354, B30B 926
Patent
active
058513914
ABSTRACT:
The sludge dewatering treatment apparatus of the present invention is provided with a cylinder that has a large number of pipe members arranged in the axial direction and secured around its inner surface, that is divided axially into two halves so as to allow opening and closing, and that is vertically installed in a frame. A rotating pipe shaft that is capable of both rotating and moving up and down is provided in an axial direction at the center of this cylinder. The rotating pipe shaft can receive sludge at an opening in its upper end from the outlet of a sludge holding hopper installed on the frame, and discharges the received sludge into a filter from sludge outflow ports. A cylindrical filter is provided that surrounds the rotating pipe shaft, the upper end of the filter being attached to the rotating pipe shaft and the lower end of the filter being attached to an opening in the base plate of the frame. The cylindrical filter takes in the sludge from the outflow ports. The diameter of the cylindrical filter is greater than the diameter of a circle inscribed within the pipe members secured in the cylinder. The rotation of the rotating pipe shaft therefore applies pressure against sludge inside the cylindrical filter, whereby the sludge is separated into water and a dewatered cake material.
REFERENCES:
patent: 5174907 (1992-12-01), Chowh
patent: 5439588 (1995-08-01), Chowh
Cosmic Round Company
Lithgow Thomas M.
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