Patent ID: 6461507
Filing Date: 2002-10-08
Classification: B01D,C02F

Abstract:
A continuous compression-type dewatering apparatus comprising:a filter chamber (3) delineated by an annular plate (2) and two side plates (1,1); a drive shaft (17) passing through a center axis of the annular plate (2), passing through the inside of the filter chamber (3), and freely rotatable with respect to the filter chamber (3); a vane (15) disposed within the filter chamber (3), fixed with respect to the drive shaft (17), extending from the drive shaft (17) toward the annular plate (2), and rotating in concert with the drive shaft (17); and a supply path (50) passing through the drive shaft (17), supplying raw fluid to the filter chamber (3), wherein the vane (15) comprises two side edges (15a, 15a) facing the side plates (1,1) and an end edge (I5b) facing the annular plate (2), at least one of the side plates (1,1) including a filter element (4) for separating the raw fluid into a filtered fluid and a cake, the annular plate (2) includes an ejection port (7) for the cake, the ejection port is provided with a valve mechanism (8) which increases and decreases an amount of opening of the ejection port (7), the valve mechanism (8) comprises a pair of rotating shafts (28, 28) rotatably supported with respect to an opposing edge of the ejection port (7), a pair of dampers (29, 29) fixed to each of the rotating shafts (28) which open and close the ejection port (7), a cylinder (32) having a rod (33), and two links (30, 30) that link the rod (33) and the rotating shafts (28, 28), convert reciprocating motion of the rod (33) to rotational motion of the rotating shafts (28, 28), and transmit this motion, and an inflow pressure of the raw fluid from the supply path (50) into the filter chamber (3) and rotation of the vane (50) causes the filtered fluid to flow out from the filter element (4) to the outside of the filter chamber (3), a cake that remains inside the filter chamber (3) being pushed to the outside of the filter chamber (3) via the ejection port (7).