Continuous-feed filtering- or screening-type centrifuge with reslurrying and dewatering
AssigneeBaker Hughes Incorporated
InventorWallace Woon-Fong Leung
Life of this patent
Estimating the term…
Abstract
In a continuous-feed filtering- or screening-type centrifuge, first dewatering a particulate material, then reslurrying the particulate material, and subsequently again dewatering the particulate material in a sequence along a cake flow path extending through the continuous-feed filtering- or screening-type centrifuge. The first dewatering, the reslurrying and the subsequent dewatering are performed in respective compartments disposed along the cake flow path. The compartments are defined in part by a plurality of gates, baffles, or weirs extending outwardly from a hub of the centrifuge. Outer ends of the gates are spaced from a bowl wall to define respective cake flow gaps which limit the thickness of a cake layer moving along the cake flow path.
Claims23
A centrifuge comprising partition elements forming a series of compartments disposed along a cake flow path, said centrifuge having a bowl including a first screen section, a second screen section and a solid bowl section therebetween, a first compartment of said series of compartments being defined on an outer side at least partially by said first screen section to enable dewatering of particulate material traveling through said first compartment along said cake flow path, a second compartment of said series of compartments disposed downstream of said first compartment along said cake flow path being defined on an outer side by said solid bowl section, said compartment having a liquid feed for reslurrying or resuspending the particulate material in said second compartment, a third compartment of said series of compartments disposed downstream of said second compartment along said cake flow path being defined on an outer side at least partially by said second screen section to enable dewatering of particulate material traveling through said third compartment along said cake flow path.
A centrifuge comprising partition elements forming a plurality of compartments disposed along a cake flow path, said centrifuge having a bowl including a solid bowl section and a screen section a first compartment of said plurality of compartments being defined on an outer side by said bowl section, said first compartment having a liquid feed for reslurrying or resuspending the particulate material in said first compartment, a second compartment of said plurality of compartments being disposed downstream of said first compartment along said cake flow path, said second compartment being defined on an outer side at least partially by said screen section to enable dewatering of particulate material traveling through said second compartment along said cake flow path.
A centrifuge comprising a bowl and a plurality of partitions defining a series of compartments disposed along a cake flow path, said compartments including a dewatering compartment followed by a reslurrying compartment in turn followed by another dewatering compartment.
A centrifuge comprising partition elements forming a plurality of substantially closed compartments disposed along a cake flow path and sufficiently open to permit passage of cake along said cake flow path, said centrifuge having a bowl including a solid bowl section and a screen section, a first compartment of said plurality of compartments being defined on an outer side at least partially by said screen section to enable dewatering of particulate material traveling through said first compartment along said cake flow path a second compartment of said plurality of compartment being disposed downstream of said first compartment along said cake flow path said second compartment being defined on an outer side by said solid bowl section, said second compartment having a liquid feed for reslurrying or resuspending the particulate material in said second compartment.
Dependencies are inferred from the claim text.