Separating Device and Method with a Return Flow of Heavy Fraction

• US 20120103423A1
• Filed: 05/12/2010
• Published: 05/03/2012
• Est. Priority Date: 05/12/2009
• Status: Active Grant

• Current Assignee: Sulzer Management AG (Sulzer AG)
• Original Assignee: Taxon BV
• Inventors: Schook, Robert
• Granted Patent: US 8,991,622 B2
• Time in Patent Office: Days
• US Class Current: 137/1
• CPC Class Codes: B01D 45/16 generated by the winding course of the gas stream , the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
• CPC Class Codes: B04C 3/00 Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct combined with other devices B04C9/00
• CPC Class Codes: B04C 3/06 Construction of inlets or outlets to the vortex chamber
• CPC Class Codes: Y10T 137/0318 Processes
• CPC Class Codes: Y10T 137/87249 Multiple inlet with multiple outlet

Abstract

The invention relates to a device for separating a heavy fraction from a fluid, comprising: a main channel; swirl means in the main channel; collecting means adjoining the main channel for collecting the discharge heavy fraction; a concentric additional supply conduit with an outlet and extending into the cylindrical housing; a return channel connecting the collecting means with the additional supply conduit, and deflection means wherein the outlet is encircling the circumference of the additional supply conduit. The invention also relates to a method for separating a heavy fraction from a fluid using such a device.

Claims

1. A device for separating a heavy fraction from a fluid, comprising:

a main channel, surrounded by a substantially cylindrical housing;

swirl means, positioned in the main channel, for transferring a rotating movement component to the fluid moving through the main channel;

collecting means, which in radially direction to openings in the cylindrical housing adjoin to the main channel, for collecting the discharged heavy fraction;

a concentric additional supply conduit, provided with an outlet, which additional supply conduit at least partly extends into the cylindrical housing;

a return channel, which connects the collecting means with the additional supply conduit, and

the additional supply conduit is provided with deflection means, which are positioned downstream of the outlet, for providing a movement component in radial direction to the returning fluid fraction moving through the return channel, wherein

the outlet of the additional supply conduit is encircling the circumference of the additional supply conduit.

2. The device as claimed in claim 1, wherein the outlet of the additional supply conduit comprises plural apertures that collectively encircle the circumference of the additional supply conduit.

3. The device as claimed in any of claim 1, wherein at least a part of the outlet of the additional supply conduit has a helical shape.

4. The device as claimed in claim 1, wherein the deflection means comprise a deflection body, positioned coaxial with the additional supply conduit and downstream of the outlet.

5. The device as claimed in claim 1, wherein the projection of the outlet of the additional supply conduit on a plane perpendicular to the main channel is lying within the projection of the deflection means on the same plane perpendicular to the main channel.

6. The device as claimed in claim 1, wherein the largest diameter of the deflection body is larger than the diameter of the outlet of the additional supply conduit.

7. The device as claimed in claim 1, wherein the deflection means are substantially dish-shaped.

8. The device as claimed in claim 1, wherein the deflection means are connected by a pen, which pen extends in axial direction in the additional supply conduit.

9. The device as claimed in claim 8, wherein the diameter of the pen with decreasing distance to the deflection means has an increasing diameter.

10. The device as claimed in claim 1, wherein the concentric additional supply conduit comprises at least two separate non-concentric flow channels.

11. The device as claimed in claim 1, wherein the deflection means are provided with a projection at its side away from the additional supply conduit.

12. The device as claimed in claim 1, wherein the deflection means are conical, with a decreasing diameter towards the outlet of the additional supply conduit.

13. The device as claimed in claim 1, wherein around the openings in the cylindrical housing of the collection means a collection space is located.

14. The device as claimed in claim 1, wherein the openings in the cylindrical housing of the collection means are elongated and extend in a direction perpendicular to the direction of the swirl-means in the main channel.

15. The device as claimed in claim 1, wherein the openings in the cylindrical housing of the collection means are at least partly surrounded by an opening edge, which opening edge extends into the cylindrical housing.

16. The device as claimed in claim 1, wherein the cylindrical housing is provided with helical extending curvatures.

17. The device as claimed in claim 16, herein the rotational direction of the helically extending curvatures are substantially perpendicular to the longitudinal direction of the openings.

18. The device as claimed in claim 1, wherein the deflection means are shaped such that they provide a rotational component to the part of the returning fluid fraction that contacts the deflection means.

19. The device as claimed in claim 1, wherein the deflection means comprise a spray-nozzle, in particular a hollow-cone nozzle.

20. The device as claimed in claim 1, wherein the cylindrical housing of the main channel is conically tapered in flow-direction.

21. The device according to claim 1 and further including means for forcing the fluid through the device.

26. The method as claimed in claim 22, wherein the method is carried out at least in part using a device as claimed in claim 1.

22. A method for separating a heavy fraction from a fluid, comprising the steps:

A) supplying the fluid through a main channel and providing the fluid with a rotational movement component;

B) discharging a heavy fraction of the fluid through openings in the wall of the main channel; and

C) returning at least a part of the heavy fraction as discharged during step B) via a return channel to an additional supply conduit which is coaxially positioned in the main channel;

wherein the heavy fraction of the fluid as returned during step C) is expelled by an outlet that encircles the additional supply conduit channel and subsequently at least part of the expelled heavy fraction of the fluid is deflected towards the exterior of the mains channel.

23. The method as claimed in claim 22, wherein the heavy fraction is substantially a fluid and in that the light fraction is substantially a gas.

24. The method as claimed in claim 22, wherein the heavy fraction returned to the main channel by the return channel is provided with a rotational component.

25. The method as claimed in claim 22, wherein only a part of the heavy fraction of the fluid discharged through openings in the wall of the main channel during step B) is returned into the main channel by the return channel.