Refiner for refining pulp

• US 8,262,861 B2
• Filed: 03/03/2008
• Issued: 09/11/2012
• Est. Priority Date: 02/28/2005
• Status: Expired due to Fees

• Current Assignee: Valmet Technologies OY (Valmet Oyj)
• Original Assignee: J&L Fiber Services Inc (Valmet Oyj)
• Inventors: Johansson, Ola M.
• Primary Examiner(s): Halpern, Mark
• Application Number:
  US12/041,379
• Publication Number:
  US 20080149291A1
• Time in Patent Office: 1,653 Days
• Field of Search: 162/261, 241/28, 241/245, 241/246, 241/261.2, 241/261.3, 241/297, 241/298
• US Class Current: 162/261
• CPC Class Codes: B02C 7/12 Shape or construction of discs
• CPC Class Codes: D21D 1/30 Disc mills
• CPC Class Codes: D21D 1/306 Discs

Abstract

A refiner plate for forming accepts and exhaust from a pulp material includes a first side and a second side and defines a channel extending between the first side and the second side. The channel is operable to direct at least some of the exhaust and at least some of the accepts away from the first side.

Claims

1. A refiner plate for a refiner for forming accepts and exhaust from a pulp material, the refiner plate comprising:

a refining side extending between inner, outer, and side peripheral walls; and

a channel having an inlet passage opening at the refining side and extending transversely through a portion of the refiner plate in the direction away from the refining side, an outlet passage extending from the inlet passage through another portion of the refiner plate in the direction from the inner peripheral wall to the outer peripheral wall, and an outlet located at the outer peripheral wall of the refiner plate and opening to the outlet passage, the refiner plate defining at least one side wall and an inner end wall of the outlet passage;

wherein the inner end wall is disposed between the inlet passage of the channel and the inner peripheral wall and defines a blocking surface that physically obstructs accepts entering the inlet passage opening from passing to a pulp feed area of the refiner such that the accepts flow radially outward within the outlet passage to the outlet so as to direct the accepts within the outlet passage away from the refining side of the refiner plate.

2. The refiner plate of claim 1, wherein the refining side includes a plurality of outwardly extending ridges.

3. The refiner plate of claim 2, wherein at least some of the plurality of outwardly extending ridges are spaced between about 0.5 millimeters and about 5 millimeters apart.

4. The refiner plate of claim 2, wherein at least some of the ridges have a height of between about 0.3 millimeters and about 10 millimeters.

5. The refiner plate of claim 1, wherein the refining side defines a plurality of grooves.

6. The refiner plate of claim 5, wherein at least some of the plurality of grooves are spaced between about 1 millimeter and about 4 millimeters apart.

7. The refiner plate of claim 5, wherein at least one of the plurality of grooves has a depth of between about 0.3 and about 10 millimeters.

8. The refiner plate of claim 1, wherein the outlet passage of the channel extends along a second side of the refiner plate spaced from the refining side.

9. The refiner plate of claim 1, wherein the inlet passage includes a generally circular inlet that has a diameter of between about 1 millimeter and about 18 millimeters.

10. The refiner plate of claim 1, wherein at least some exhaust and at least some accepts are directed across the refining side beyond the outer peripheral wall.

11. The refiner plate of claim 8, wherein at least some exhaust and at least some accepts are directed across the second side beyond the outer peripheral wall.

12. A refiner plate for a refiner for forming accepts and exhaust from a pulp material, the refiner plate comprising:

a refining side extending between inner, outer, and side peripheral walls; and

a channel having an inlet passage opening to the refining side and extending through a portion of the refiner plate in the direction away from the refining side, an outlet passage extending from the inlet passage through another portion of the refiner plate in the direction from the inner peripheral wall to the outer peripheral wall, and an outlet located at one of the outer peripheral wall and the side peripheral wall of the refiner plate and opening to the outlet passage, the refiner plate defining opposite side walls and an inner end wall of the outlet passage;

wherein the inner end wall is disposed between the inlet passage of the channel and the inner peripheral wall and defines a blocking surface that physically obstructs accepts entering the inlet passage opening from passing to a pulp feed area of the refiner such that the accepts flow radially outward within the outlet passage to the outlet so as to direct the accepts within the outlet passage away from the refining side of the refiner plate.

13. The refiner plate of claim 12, wherein the outlet passage of the channel extends along a second side spaced from the refining side.

14. The refiner plate of claim 12, further comprising a plurality of ridges extending across at least a portion of the refining side.

15. The refiner plate of claim 14, wherein the plurality of ridges are spaced less than about 5 millimeters apart.

16. The refiner plate of claim 14, wherein the ridges have a height of less than about 10 millimeters.

17. The refiner plate of claim 14, wherein the refining side defines a plurality of grooves.

18. The refiner plate of claim 15, wherein the plurality of grooves are spaced less than about 4 millimeters apart.

19. The refiner plate of claim 15, wherein at least one of the plurality of grooves has a depth of less than about 10 millimeters.

20. The refiner plate of claim 12, wherein the inlet passage includes a generally circular inlet that has a diameter of between about 1 millimeter and about 18 millimeters.

21. The refiner plate of claim 12, wherein at least some exhaust and at least some accepts are directed across the refining side beyond the outer peripheral wall.

22. The refiner plate of claim 13, wherein at least some exhaust and at least some accepts are directed across the second side beyond the outer peripheral wall before being directed away from the refiner plate.

23. The refiner plate of claim 12, wherein the outlet is located at the side peripheral wall.