1. Paper technology
Wood pulp / Bleaching (2)
Technical Support
Sappi Fine Paper Europe
1 | [Presentation title] | [Client Name] | [Date]

2. Wood pulp production
2 | [Presentation title] | [Client Name] | [Date]

3. Wood pulp
The digester is opened Placing of the vapour filling apparatus
The chips are cooked in the digester for 8-10 hours
with the chemical magnesium bisulphite. It reacts
with the lignin of the wood to lignin sulphone acid
which is completely water-soluble and can, thus,
be easily washed out of the pulp.
Introduction of the vapour filling apparatus
3 | [Presentation title] | [Client Name] | [Date]

4. Wood pulp
Sampling of cooking acid Control of the pulping degree
Emptying of the digester Diffusion washing
4 | [Presentation title] | [Client Name] | [Date]

5. Wood pulp
Process monitoring Wood pulp washing
Wood pulp before washing Wood pulp after washing
5 | [Presentation title] | [Client Name] | [Date]

6. Bleaching towers
6 | [Presentation title] | [Client Name] | [Date]

7. Bleaching tower
7 | [Presentation title] | [Client Name] | [Date]

8. Observation point pulp mill
8 | [Presentation title] | [Client Name] | [Date]

9. Wood pulp
Unwashed, unbleached wood pulp Wood pulp in the bleaching intermediate step
Bleached and unbleached wood pulp
9 | [Presentation title] | [Client Name] | [Date]

10. Fibrous substances
Long fibres Short fibres
Length: 800 - 4500 µm Length: 200 - 800 µm
Thickness: 25 - 80 µm Thickness: 2,5 - 28 µm
10 | [Presentation title] | [Client Name] | [Date]

11. Fibre
Hygroscopic effect by capillaries
Moving direction of
the fibre
Extension direction of
the fibre
11 | [Presentation title] | [Client Name] | [Date]

12. Wood pulp bale
12 | [Presentation title] | [Client Name] | [Date]