1. Wood Preparation & Pulp Wood Measurements
PPT 115

2. Woodyard Overview

3. Pulpwood Operation Safety Quality of wood Economics – Profit & Loss
Weight of Dry Wood
Moisture content
Dry density
Differs vary greatly between species
Relatively the same for a species

4. Indirect Measures Volume Gross – cord Solid – cunit Bulk Volume - unit
Amount of water displaced
Green Weight & Accurate estimate of moisture
Bulk Volume - unit

5. Roundwood Delivery

6. Unloaded logs Grapples Storage in woodyard Sorting
Slasher Deck – cut down
Deicing and/or washing
Reduce sand/soil etc
Debarking

7. Wood Preparation Logs to chips Logs to lumber
Logs to shortwood - groundwood

8. Residuals SAWMILL WOOD PREP PLANT PLYWOOD PLANT PULP MILL LUMBER
CHIPS SAWDUST SHAVINGS
PULP MILL
PULP & PAPER

9. Rail Delivery

10. Wood Storage

11. Wood Storage

12. Shortwood Flume

14. Log Handling

15. Log Handling

16. Debarking Mechanical –friction- rotating drum/log to log action
Wet or dry
Bark burning furnace
Cambium shearbarkers – inner bark and cambium layer
Some debarkers work better on frozen logs
High wood loss?
Rosser headbarkers
Hydraulic
In the West
Water pressure
Capital/energy cost are high but yield is high
Hard to process effluent

17. Barking Drum

18. Barking Drum

19. Barking Drum

20. Ring or Knife Debarker

21. Bark Contaminants

22. Bark Inorganics Bark Wood Calcium, lb/ton 2-20 1-2
Silica, lb/ton
Alumina, lb/ton

23. Bark Organics Pitch Fatty Acid Salts Rosin Acid Salts
Resinous Alcohols
Turpenes
Waxes