Patent ID: 6537191
Filing Date: 2003-03-25
Classification: B04B

Abstract:
A centrifugal separator for separating solids from a liquid mixture, in which the solids in the form of particles are suspended in a liquid having a density smaller than that of the particles, which centrifugal separator includesa rotor (1) having a center axis (R), around which it is rotatable at a first speed, a screw conveyor (2), which is arranged in the rotor (1) and is rotatable around said center axis (R) at a second speed differing from said first speed, and a driving device, which is adapted for rotation of the rotor (1) at said first speed and the screw conveyor (2) at said second speed, the rotor (1) being rotatably supported only at one end through a rotor shaft (5), arranged so that the rotor center axis extends substantially vertically, the rotor (1) having an inlet for said mixture in the form of at least one inlet channel (22-24), which extends into the rotor at is said one end, a liquid outlet for separated liquid in the form of at least one outlet channel (12; 66-68), which extends out of the rotor at its said one end, and a sludge outlet (13) for separated solids situated at the opposite end of the rotor, the rotor including a conical portion (6), at the apex of which said sludge outlet (13) is situated, the screw conveyor (2) being formed for transportation of separated solids through said conical portion (6) of the rotor towards the sludge outlet (13), and the screw conveyor (2) being engaged for rotation with a conveyor shaft (8), which extends axially through the rotor shaft (5) and is coupled together with said driving device, and wherein the conveyor shaft (8) is connected with a supporting body (9), which is arranged within and coaxially with the rotor (1), and the screw conveyor (2) is releasably supported by the supporting body (9), the screw conveyor (2) being axially displaceable into and out of engagement with the supporting body (9).