REFINER FOR REFINING PULP

• US 20080149291A1
• Filed: 03/03/2008
• Published: 06/26/2008
• Est. Priority Date: 02/28/2005
• Status: Active Grant

• Current Assignee: Valmet Technologies OY
• Original Assignee: Ola M. Johansson
• Inventors: Johansson, Ola M.
• Granted Patent: US 8,262,861 B2
• Time in Patent Office: Days
• 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 forming accepts and exhaust from a pulp material, the refiner plate comprising a first side, a second side, and a channel extending between the first side and the second side, wherein the channel is operable to direct from the first side at least some of the exhaust and at least some of the accepts outwardly through the channel toward the second side.

2. The refiner plate of claim 1, wherein the first 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 first 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 first side defines a channel inlet, and wherein the second side defines a channel outlet.

9. The refiner plate of claim 8, wherein the channel inlet has a diameter of between about 1 millimeter and about 18 millimeters.

10. The refiner plate of claim 1, wherein the first side includes an outer edge, and wherein the at least some of the exhaust and the at least some of the accepts are directed across the outer edge.

11. The refiner plate of claim 1, wherein the at least some of the exhaust and the at least some of the accepts are directed across the second side.

12. A refiner plate for forming accepts and exhaust from a pulp material, the refiner plate comprising a first side and a second side spaced a distance from the first side, and a channel extending through the refiner plate and communicating between the first side and atmosphere for directing from the first side at least some of the exhaust and at least some of the accepts outwardly through the channel toward the second side.

13. The refiner plate of claim 12, wherein the second side defines a channel outlet.

14. The refiner plate of claim 12, further comprising a plurality of ridges extending across at least a portion of the first 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 first 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 first side defines a channel inlet, and wherein the channel inlet has a diameter of between about 1 millimeter and about 18 millimeters.

21. The refiner plate of claim 12, wherein the first side includes an outer edge, and wherein the at least some of the exhaust and the at least some of the accepts are directed across the outer edge.

22. The refiner plate of claim 12, wherein the at least some of the exhaust and the at least some of the accepts are directed across the second side before being directed away from the refiner plate.

23. The refiner plate of claim 12, wherein the refiner plate includes an inner edge and an outer edge, and wherein the outer edge defines a channel outlet.