Centrifugal separator with cones divided into angular sectors separated by annular gaps
AssigneesCommissariat A L'energie Atomique Et Aux Energies Alternatives, Flowersep
InventorsDavid Chezaud, Jean-Pierre Feraud, Joël Robin, Tojonirinia Randriamanantena
Life of this patent
Estimating the term…
Abstract
The rotary bowl (1) of this centrifugal separator is lined with conical structures divided into sectors (7) separated by angularly offset gaps (9) so as to promote a regular spiral fluid flow therein, which is laminar and enhances separation efficiency significantly: in the case of two-phase or three-phase suspensions, a “cake” is obtained on the side wall (8). A scraper (15) rotating at a slightly different speed may be added to enable simultaneously routing of the solid cake to the outlet and continuous processing.
Claims17
Centrifugal separator comprising a rotary bowl (1) having a peripheral wall (8), a separation structure situated in the bowl and rotating synchronously with the bowl, a mixture inlet conduit (5) situated on a rotational axis (2) of the bowl and opening (6) in the bowl, the bowl comprising at least one outlet orifice (10) for at least one light fraction of the mixture to a first axial side of the bowl, the separation structure comprising a stack of cones divided into angular sectors (7) separated by angular gaps (9), the angular gaps being covered by the sectors (7) of the immediately adjacent cones, and the sectors having peripheral ends at an identical distance from the peripheral wall, wherein the peripheral wall (8) and the separation structure rotate at a same rotary speed, and wherein the cones are separated by calibrated spacers (33).
Centrifugal separator comprising a rotary bowl (1) having a peripheral wall (8), a separation structure situated in the bowl and rotating synchronously with the bowl, a mixture inlet conduit (5) situated on a rotational axis (2) of the bowl and opening (6) in the bowl, the bowl comprising at least one outlet orifice (10) for at least one light fraction of the mixture to a first axial side of the bowl, the separation structure comprising a stack of cones divided into angular sectors (7) separated by angular gaps (9), the angular gaps being covered by the sectors (7) of the immediately adjacent cones, and the sectors having peripheral ends at an identical distance from the peripheral wall, wherein the peripheral wall (8) and the separation structure rotate at a same rotary speed, and wherein the sectors comprise extensions (31, 32) extending axially and radially in the rotary bowl (1) and each joining another sector belonging to an adjacent cone.
Centrifugal separator comprising a rotary bowl (1) having a peripheral wall (8), a separation structure situated in the bowl and rotating synchronously with the bowl, a mixture inlet conduit (5) situated on a rotational axis (2) of the bowl and opening (6) in the bowl, the bowl comprising at least one outlet orifice (10) for at least one light fraction of the mixture to a first axial side of the bowl, the separation structure comprising a stack of cones divided into angular sectors (7) separated by angular gaps (9), the angular gaps being covered by the sectors (7) of the immediately adjacent cones, and the sectors having peripheral ends at an identical distance from the peripheral wall, wherein the peripheral wall (8) and the separation structure rotate at a same rotary speed, and wherein the bowl comprises an opening (23) for retrieving a heavy fraction of the mixture, and said opening is situated via a second axial side of the bowl opposite the first axial side.
Centrifugal separator comprising a rotary bowl (1) having a peripheral wall (8), a member (21) for supporting the rotary bowl (1), a separation structure situated in the bowl and rotating synchronously with the bowl, a mixture inlet conduit (5) situated on a rotational axis (2) of the bowl and opening (6) in the bowl, the bowl comprising at least one outlet orifice (10) for at least one light fraction of the mixture to a first axial side of the bowl, the separation structure comprising a stack of cones divided into angular sectors (7) separated by angular gaps (9), the angular gaps being covered by the sectors (7) of the immediately adjacent cones, and the sectors having peripheral ends at an identical distance from the peripheral wall, wherein the peripheral wall (8) and the separation structure rotate at a same rotary speed.
Centrifugal separator comprising a rotary bowl (1) having a peripheral wall (8), a separation structure situated in the bowl and rotating synchronously with the bowl, a mixture inlet conduit (5) situated on a rotational axis (2) of the bowl and opening (6) in the bowl, the bowl comprising at least one outlet orifice (10) for at least one light fraction of the mixture to a first axial side of the bowl, the separation structure comprising a stack of cones divided into angular sectors (7) separated by angular gaps (9), the angular gaps being covered by the sectors (7) of the immediately adjacent cones, and the sectors having peripheral ends at an identical distance from the peripheral wall, wherein the peripheral wall (8) and the separation structure rotate at a same rotary speed, and wherein the outlet orifice (10) has an adjustable opening.
Method for separating a heavy fraction and a light fraction of a mixture using a centrifugal separator comprising a rotary bowl (1) having a peripheral wall (8), a separation structure situated in the bowl and rotating synchronously with the bowl, a mixture inlet conduit (5) situated on a rotational axis (2) of the bowl and opening (6) in the bowl, the bowl comprising at least one outlet orifice (10) for at least one light fraction of the mixture to a first axial side of the bowl, the separation structure comprising a stack of cones divided into angular sectors (7) separated by angular gaps (9), the angular gaps being covered by the sectors (7) of the immediately adjacent cones, and the sectors having peripheral ends at an identical distance from the peripheral wall, the method comprising the following steps:
- introducing the mixture into the rotary bowl, the bowl being rotating, via the inlet conduit;
- letting the mixture flow through the gaps of the stack of cones in a spiral flow comprising a regular progressive axial motion, the flow being laminar;
- discharging the light fraction of the mixture out of the bowl at the outlet orifice;
- and
- depositing the heavy fraction on the peripheral wall.
Dependencies are inferred from the claim text.