Flinger apparatus for a counter-rotating refiner

Patent metadata

Field	Value
Publication number	US-11628446-B2
Application number	US-202017027247-A
Country	US
Kind code	B2
Filing date	Sep 21, 2020
Priority date	Sep 23, 2019
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

This disclosure relates to an apparatus for a counter-rotating mechanical refiner configured to mitigate the problems of feeding variations, load variations, high energy consumption due to poor feeding efficiency, low pulp quality, and reduced throughput capacity by positioning a flinger proximate to a rotor gap side of a first rotor, wherein the first rotor further comprises an inlet extending through the first rotor, such that a portion of the operational flinger deflects feed material from the inlet into the refiner gap while rotating in the direction of the first rotor.

First claim

What is claimed is:

1. A feed rotor assembly comprising:
a rotor configured to rotate in a first rotational direction, the rotor having:
an upstream side comprising a feedstock inlet;
a rotor gap side distally disposed from the upstream side, wherein the rotor gap side faces a refining gap,
wherein the feedstock inlet extends through the rotor,
wherein the feedstock inlet has an inlet gap end, and
wherein the feedstock inlet fluidly communicates with the rotor gap side at the inlet gap end; and

a flinger disposed at the rotor gap side, wherein the flinger rotates in the first rotational direction with the rotor, and wherein the flinger has a portion disposed adjacent to the inlet gap end such that the portion is configured to obstruct the inlet gap end.

2. The feed rotor assembly of claim 1 , wherein the flinger is a segmented flinger, and wherein the feed rotor assembly further comprises a plate holder configured to pilot the segmented flinger at a diameter, and wherein the diameter is one of an inner diameter, an intermediate diameter, or an outer diameter.

3. The feed rotor assembly of claim 1 further comprising a plate holder, wherein the plate holder is disposed between the flinger and the rotor.

4. The feed rotor assembly of claim 1 further comprising a plate holder, wherein the flinger is disposed between the plate holder and the rotor.

5. The feed rotor assembly of claim 1 , wherein the flinger further comprises flinger bars.

6. The feed rotor assembly of claim 1 , wherein the flinger lacks flinger bars.

7. The feed rotor assembly of claim 1 , wherein the flinger is fused to the rotor gap side of the rotor.

8. The feed rotor assembly of claim 1 , wherein the portion of the flinger extends radially to an outer diameter of the feedstock inlet.

9. The feed rotor assembly of claim 1 , wherein the portion of the flinger extends radially beyond an outer diameter of the feedstock inlet.

10. The feed rotor assembly of claim 1 , wherein a separate rotational device rotates the flinger in the first rotational direction independent of a rotational device used to rotate the rotor.

11. A counter-rotating refiner assembly comprising:
a feed rotor assembly having:
a first rotor configured to rotate in a first rotational direction, the first rotor having:
an upstream side comprising a feedstock inlet;
a rotor gap side distally disposed from the upstream side, wherein the rotor gap side faces a refining gap,
wherein the feedstock inlet extends through the first rotor, wherein the feedstock inlet has an inlet gap end, and wherein the feedstock inlet fluidly communicates with the rotor gap side, and

a flinger disposed at the rotor gap side, wherein the flinger rotates in the first rotational direction with the first rotor, and wherein the flinger has a portion obstructing the inlet gap end; and
a control rotor assembly having:
a second rotor oppositely disposed from the feed rotor assembly, wherein the second rotor is configured to rotate in a second rotational direction, wherein the second rotational direction is an opposite direction to the first rotational direction of the first rotor.

12. The feed rotor assembly of claim 11 , wherein the flinger is a segmented flinger, and wherein the first rotor further comprises a plate holder configured to pilot the segmented flinger at a diameter, and wherein the diameter is one of an inner diameter, an intermediate diameter, and/or outer diameter.

13. The feed rotor assembly of claim 11 further comprising a plate holder, wherein the plate holder is disposed between the flinger and the first rotor.

14. The feed rotor assembly of claim 11 further comprising a plate holder, wherein the flinger is disposed between the plate holder and the first rotor.

15. The feed rotor assembly of claim 11 , wherein the flinger further comprises flinger bars.

16. The feed rotor assembly of claim 11 , wherein the flinger lacks flinger bars.

17. The feed rotor assembly of claim 11 , wherein the flinger is fused to the rotor gap side of the first rotor.

18. The feed rotor assembly of claim 11 , wherein the portion of the flinger extends radially to an outer diameter of the feedstock inlet.

19. The feed rotor assembly of claim 11 , wherein the portion of the flinger extends radially beyond an outer diameter of the feedstock inlet.

20. The feed rotor assembly of claim 11 , wherein a separate rotational device rotates the flinger in the first rotational direction independent of a rotational device used to rotate the first rotor.

Assignees

• Andritz Inc

Inventors

• Gingras Luc
• Berger Marc

Classifications

• D21D1/303

  Double disc mills · CPC title

• B02C7/02

  with coaxial discs · CPC title

• D21D1/30

  Disc mills · CPC title

• B02C7/12 Primary

  Shape or construction of discs · CPC title

• D21D1/34 Primary

  Other mills or refiners · CPC title