Distributor for a scroll screen centrifugal separator

Patent metadata

Field	Value
Publication number	US-9751094-B2
Application number	US-201415104173-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Dec 18, 2013
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A scroll screen centrifugal separator includes a distributor that is configured to receive slurry received from a feed conduit. The distributor is configured to deflect the received slurry to a screen of the scroll screen centrifugal separator. In some embodiments, the distributor may include a distributor that has a flat surface encircled by a lip or having one or more lips positioned on the flat surface, an inclined surface, or a declined surface that faces the mouth of the feed conduit. In other embodiments, the distributor may include a plurality of dam members for defining passageways through which slurry is passable through the distributor prior to being ejected to a screen of the separator. In other embodiments, the distributor may include a distributor plate that has a plurality of radial arms attached thereto that are configured to direct slurry to the basket with a rotational velocity.

First claim

What is claimed is:

1. A distributor for a scroll screen centrifugal separator comprising:
a first plate;
a second plate spaced apart from the first plate;
at least one arm attached to at least one of the first plate and the second plate;
at least one ring positioned adjacent the arm;
the at least one arm and the at least one ring being positioned between the first plate and the second plate to define a labyrinth therein such that slurry received by an inlet of the distributor is passable through the labyrinth toward an outlet of the distributor for directing the slurry from the outlet to a screen assembly of a scroll screen centrifugal separator;
wherein the at least one arm is comprised of a plurality of arms that are spaced apart from one another, each of the plurality of arms being attached to the second plate;
wherein the at least one ring is comprised of a plurality of spaced apart rings comprising a first ring and a second ring, the first ring attached to the second plate and positioned to define a first gap between a side of the first ring and the first plate such that slurry is passable through the first gap when the slurry is moved from the inlet to the outlet, the second ring attached to the first plate and positioned to define a second gap between a side of the second ring and the second plate such that, the slurry is passable through the second gap when the slurry is moved from the inlet to the outlet; and
wherein the first ring and second ring are spaced apart from each other such that the first ring is an inner ring positioned closer to a central portion of the second plate than the second ring, the first and second rings defining a channel through which the slurry is passable as the slurry moves from the inlet to the outlet, the channel being in fluid communication with the first and second gaps.

2. The distributor of claim 1 wherein the labyrinth is configured such that the slurry emitttable from the outlet has a preselected rotational velocity profile that is within 5%-150% of a rotational velocity of a screen of the screen assembly.

3. The distributor of claim 1 wherein the second plate has a projection that is sized and configured for being received within at least one of a shaft and a scroll assembly of a scroll screen centrifugal separator.

4. The distributor of claim 1 further comprising:
an outer wall attached to the first plate to surround the first plate, the outer wall being spaced apart from the second plate to define the outlet; and
wherein the channel and the first and second gaps are portions of the labyrinth and at least partially define a path of travel for the slurry through the labyrinth as the slurry passes from the inlet to the outlet, the inlet being defined by the first plate.

5. The distributor of claim 1 wherein the first plate is a ring member that defines the inlet, the second plate is a circular plate member, and each of the at least one ring is an annular structure.

6. The distributor of claim 5 wherein each of the at least one arm is an elongated member that extends radially from adjacent an inner portion of the second plate to an outer portion of the second plate.

7. The distributor of claim 5 wherein at least a portion of the member of the at least one arm is curved.

8. A distributor for a scroll screen centrifugal separator comprising:
a first plate;
a second plate spaced apart from the first plate;
at least one arm attached to at least one of the first plate and the second plate;
at least one ring positioned adjacent the arm;
the at least one arm and the at least one ring being positioned between the first plate and the second plate to define a labyrinth therein such that slurry received by an inlet of the distributor is passable through the labyrinth toward an outlet of the distributor for directing the slurry from the outlet to a screen assembly of a scroll screen centrifugal separator;
wherein the at least one ring is comprised of a plurality of spaced apart rings comprising a first inner ring, a second intermediate ring, and a third outer ring,
the first inner ring being attached to the second plate and positioned to define a first gap between a side of the first inner ring and the first plate such that the slurry is passable through the first gap as the slurry is moved from the inlet to the outlet,
the second intermediate ring being attached to the first plate and positioned between the first and third rings, the second ring positioned to define a second gap between a side of the second ring and the second plate such that the slurry is passable through the second gap when the slurry is moved from the inlet to the outlet, and
the third outer ring being attached to the second plate and positioned to define a third gap between a side of the third outer ring and the first plate such that the slurry is passable through the third gap as the slurry is moved from the inlet to the outlet.

9. The distributor of claim 8 wherein:
the first and second rings being spaced apart from each other to define a first channel through which the slurry is passable, the first channel being in fluid communication with the first and second gaps; and
the second and third rings being spaced apart from each other to define a second channel through which the slurry is passable, the second channel being in fluid communication with the second and third gaps.

10. The distributor of claim 9 further comprising:
an outer wall attached to the second plate to surround a periphery of the second plate, the second wall being spaced apart from an outer edge of the first plate to define the outlet.

11. The distributor of claim 10 wherein the first and second channels and the first, second and third gaps are portions of the labyrinth.

12. A scroll screen centrifugal separator comprising:
a housing;
a feed conduit connected to the housing, the feed conduit having a mouth through which slurry is fed into a cavity of the housing;
a screen assembly mounted within the cavity of the housing for driven rotation within the housing;
a scroll assembly mounted for driven rotation within the cavity of the housing, the scroll assembly being positioned within the screen assembly, and
a distributor positioned between the feed conduit and the scroll assembly, the distributor comprising:
a first plate;
a second plate spaced apart from the first plate;
at least one arm attached to at least one of the first plate and the second plate;
at least one ring positioned adjacent the arm;
the at least arm and the at least one ring positioned between the first plate and the second plate to define a labyrinth therein such that the slurry received by an inlet of the distributor is passable through the labyrinth toward an outlet of the distributor for directing the slurry from the outlet to a screen assembly of a scroll screen centrifugal separator.

13. The scroll screen centrifugal separator of claim 12 wherein the scroll screen centrifugal separator is a horizontal scroll screen centrifugal separator or is a vertical scroll screen centrifugal separator.

14. The scroll screen centrifugal separator of claim 12 wherein the at least one arm is comprised of a plurality of arms that are spaced apart from one another, each of the plurality of arms being attached to the second plate;
wherein the at least one ring is comprised of a plurality of spaced apart rings comprising a first ring and a second ring, the first ring attached to the second plate and positioned to define a first gap between a side of the first ring and the first plate such that the slurry is passable through the first gap when the slurry is moved

Assignees

• Smidth As F L

Inventors

• Gardiner Michael J
• Walker Mathew
• Elliott Tony
• Starr David
• Wilson Craig
• Flanagan Mark
• Lewis Barry

Classifications

• B04B3/04

  discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl · CPC title

• B04B2001/2033

  with feed accelerator inside the conveying screw · CPC title

• B04B11/06 Primary

  Arrangement of distributors or collectors in centrifuges · CPC title

• B04B3/00

  Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering · CPC title