Feeding apparatus for cellulosic material

• US 6,945,487 B1
• Filed: 09/21/2000
• Issued: 09/20/2005
• Est. Priority Date: 09/23/1999
• Status: Expired due to Fees

• Current Assignee: Lars Obitz
• Original Assignee: Lars Obitz
• Inventors: Obitz, Lars
• Primary Examiner(s): Rosenbaum, Mark
• Application Number:
  US09/666,326
• Time in Patent Office: 1,825 Days
• Field of Search: 241/260.1, 241/278.1, 241/277
• US Class Current: 241/260.1
• CPC Class Codes: D21D 1/20 Methods of refining

Abstract

An apparatus for pressure tight discharge of refiner material, such as cellulosic material by using a screw which feeds the material between a screw shaft and screw housing whereby a pressure tight material plug is formed at an outlet of the screw housing. The screw is, at the out end, provided with a flange which together with a throttle journalled around the flange forms an adjustable outlet opening through which material is fed out by the screw while the material forms a pressure tight material plug.

Claims

1. A feeding apparatus for discharging cellulosic material from a steam separator, the feeding apparatus comprising;

a housing having an inlet adapted to be connected to a discharge from the steam separator through which the cellulosic material enters said housing and an outlet through which the cellulosic material leaves said housing, said housing being sealed to prevent loss of steam therefrom between said inlet and said outlet, a screw disposed within said housing which feeds the cellulosic material from said inlet between a peripheral portion of a screw shaft and an inner surface of said housing, said screw shaft including a flanged portion which extends transversely outwardly of said screw shaft toward said outlet and which, together with a throttle means provided radially outwardly thereof, define an opening of said outlet of said housing, and means for adjusting said throttle means relative to said flanged portion so as to adjust a size of the outlet opening to thereby form the cellulosic material into a pressure tight material plug at the outlet opening to thereby prevent loss of steam pressure from the steam separator through the feeding apparatus when the feeding apparatus is connected to the steam separator.

2. The apparatus according to claim 1, wherein said means for adjusting said throttle means includes a plug pipe which is movably journalled to said housing so that said plug pipe may be linearly adjusted relative to said flanged portion of said screw to control the size of the outlet opening.

3. The apparatus according to claim 2, wherein said plug pipe is movably journalled by a spline connection between said plug pipe and said housing.

4. The apparatus according to claim 3 wherein said screw shaft is journalled in a bearing provided outside of said housing.

5. The apparatus according to claim 4, wherein said bearing is provided adjacent the outlet of said housing.

6. The apparatus according to claim 5 wherein said bearing is provided at a distance from said housing and thereby defines a discharge space for the cellulosic material passing through the outlet opening.

7. The apparatus according to claim 5 including wings provided on said screw shaft outside of and adjacent to the outlet opening for breaking up discharged cellulosic material.

8. The apparatus according to claim 4, wherein displacement of said plug pipe is carried out by means of operating rods mounted in said bearing.

9. The apparatus of claim 2 wherein said screw shaft is mounted in a bearing provided beyond said outlet of said housing.

10. The apparatus according to claim 9 wherein said bearing is provided at a distance from said housing and thereby defines a discharge space for the cellulosic material passing through the outlet opening.

11. The apparatus according to claim 2 including wings provided on said screw shaft outside of and adjacent to the outlet opening for breaking up cellulosic material passing through the outlet opening.

12. The apparatus according to claim 1 including wings provided on said screw shaft outside of and adjacent to the outlet opening for breaking up cellulosic material passing through the outlet opening.