Displacement washing of pulp fibre beds - Comment on the influence of permeability

DİLİPAK H., Urban G.

Pulp Washing 96, Vancouver, Kanada, 7 - 10 Ekim 1996, ss.9-12, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Vancouver
  • Basıldığı Ülke: Kanada
  • Sayfa Sayıları: ss.9-12
  • Gazi Üniversitesi Adresli: Hayır

Özet

Displacement washing of chemical pulp is one of the main methods in pulp washing operations. In modern equipment there is a trend to work in such a way that excessive dilution and dewatering operations are avoided and e.g. the energy demand of recirculation pumping is minimised. However, when increasing the pulp consistency the pulp fibre bed will be more heterogeneously formed and the washing efficiency will decrease. The result of a laboratory study showed that a bed formed from a dilute fibre suspension (2 %) gave a better displacement washing than one formed at high consistency (10 %). It was also found that there was a good correlation between the permeability of the fibre bed and the displacement ratio.