Decanter centrifuge
First Claim
1. A decanter centrifuge for separating solids from a liquid medium, comprising:
- a drum; and
a helical conveyor rotatably mounted within the drum, said conveyor having a conveyor hub and at least one helical flight joined to the hub, wherein the at least one flight is made of a single elastomeric material, wherein said centrifuge has a liquid inlet end and a liquid outlet end of larger diameter than the inlet end and wherein said drum has an inside curved surface formed of linear sections, said section adjacent the outlet end forming a tangential angle of 0 to 8 degrees relative to a longitudinal axis of the drum, and said section adjacent the inlet end forming a tangential angle of 8 to 25 degrees relative to said longitudinal axis.
3 Assignments
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Accused Products
Abstract
A decanter centrifuge (1) has a rotor comprising a helical conveyor (2) and a drum (20). The conveyor (2) comprises a conveyor hub (3) and helical flights (4), and the drum comprises an inner shell (21) of steel and an outer shell (22) of fiber reinforced plastic. The conveyor (2) consists of a shaft of tube form (11), primarily made from carbon fiber reinforced resin, and helical flights (4), primarily made from polyurethane. The flights (4) of the helical conveyor are formed in such a way that they all the time is in contact with the inner periphery of the drum (31). The division of the drum in an inner and an outer shell causes the mass of the drum to be reduced considerably.
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Citations
11 Claims
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1. A decanter centrifuge for separating solids from a liquid medium, comprising:
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a drum; and a helical conveyor rotatably mounted within the drum, said conveyor having a conveyor hub and at least one helical flight joined to the hub, wherein the at least one flight is made of a single elastomeric material, wherein said centrifuge has a liquid inlet end and a liquid outlet end of larger diameter than the inlet end and wherein said drum has an inside curved surface formed of linear sections, said section adjacent the outlet end forming a tangential angle of 0 to 8 degrees relative to a longitudinal axis of the drum, and said section adjacent the inlet end forming a tangential angle of 8 to 25 degrees relative to said longitudinal axis.
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2. A decanter centrifuge for separating solids from a liquid medium, comprising:
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a drum; and a helical conveyor rotatably mounted within the drum, said conveyor having a conveyor hub and at least one helical flight joined to the hub, wherein the at least one flight is made of a single elastomeric material, wherein said drum comprises an inner metal shell having a wear resistant coating on an inside surface thereof, and an outer shell made from a fiber-reinforced resin.
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- 3. A decanter centrifuge for separating suspended solids from a liquid medium, wherein a helical conveyor is rotatably mounted within a drum and the conveyor includes a hub and at least one helical flight attached to the hub wherein the hub and the at least one helical flight are integrally formed in one piece of the same elastomeric material.
Specification