Centrifuge feed pipes and associated apparatus

Patent metadata

Field	Value
Publication number	US-11318480-B2
Application number	US-201916291389-A
Country	US
Kind code	B2
Filing date	Mar 4, 2019
Priority date	Mar 4, 2019
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

In one aspect, centrifuge feed pipes are described herein having design and architecture for mitigating wear during centrifuging operations. In some embodiments, a centrifuge feed pipe comprises a feed material inlet, a feed material outlet, and a conduit body extending along an axis between the feed material inlet and outlet, the conduit body having a variable inner diameter at one or more locations along the axis. In being variable, the inner diameter is not uniform over all radial positions of the inner diameter.

First claim

The invention claimed is:

1. A centrifuge feed pipe comprising:
a feed material inlet, a feed material outlet, and a conduit body extending along an axis between the feed material inlet and outlet, the conduit body having a variable inner diameter located at a single radial position on the inner diameter, the single radial position within 20 degrees of a radial position where centrifugal force is normal to the conduit body during operation, and wall thickness between the inner diameter and an outer diameter of the conduit body is variable over at least a portion of the axis.

2. The feed pipe of claim 1 , wherein the variable inner diameter has an oval cross-section.

3. The feed pipe of claim 1 , wherein a cross-section of the variable inner diameter comprises one or more linear sections.

4. The feed pipe of claim 1 , wherein the wall thickness increases at the radial position normal to centrifugal force experienced by the feed pipe.

5. The feed pipe of claim 1 , wherein the variable inner diameter is present at the radial position over the entire axis.

6. The feed pipe of claim 1 , wherein the variable inner diameter comprises one or more ridges extending over at least a portion of the axis.

7. The feed pipe of claim 6 , wherein the one or more ridges define feed material troughs extending parallel to the axis and splitting feed material flow streams.

8. The feed pipe of claim 7 , wherein the troughs have the same depth.

9. The feed pipe of claim 7 , wherein the troughs extend to the outlet.

10. The feed pipe of claim 7 , wherein the troughs have the same cross-sectional profile.

11. The feed pipe of claim 7 , wherein the troughs have different cross-sectional profiles.

12. The feed pipe of claim 6 , wherein the one or more ridges have uniform height.

13. The feed pipe of claim 6 , wherein the one or more ridges have variable height.

14. The feed pipe of claim 1 , wherein the variable inner diameter comprises one or more baffles to accumulate particles of the feed material at the radial position.

15. The feed pipe of claim 14 , wherein the baffles have periodic spacing along the axis.

16. The feed pipe of claim 14 , wherein the baffles have aperiodic spacing along the axis.

17. The feed pipe of claim 14 , wherein the baffles have the same geometry along the axis.

18. The feed pipe of claim 14 , wherein the baffles have different geometry along the axis.

19. The feed pipe of claim 14 , wherein the baffles accumulate sufficient particles to inhibit wear of inner diameter surfaces.

20. The centrifuge food pipe of claim 1 comprising a flat wall extending between the inlet and outlet at the radial position.

Assignees

• Kennametal Inc

Inventors

• Dewicki Grzegorz
• Singley Joshua T
• Ledyan Pavel
• Robertson John D
• Gamble Kevin M

Classifications

• B04B1/00

  Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles · CPC title

• B04B11/02 Primary

  Continuous feeding or discharging; Control arrangements therefor · CPC title

• B01F27/50

  Pipe mixers, i.e. mixers wherein the materials to be mixed flow continuously through pipes, e.g. column mixers · CPC title

• B04B7/04 Primary

  Casings facilitating discharge · CPC title

• B01F15/0201

  Operations & Transport · mapped topic