Sökning: "Mechanical pulping"

Visar resultat 6 - 8 av 8 uppsatser innehållade orden Mechanical pulping.

  1. 6. Application of enzymes for pre-treatment of wood chips for energy efficient thermomechanical pulping

    Master-uppsats, Institutionen för fysik, kemi och biologi; Tekniska högskolan

    Författare :Tomas Mårtensson; [2012]
    Nyckelord :Thermo mechanical pulping TMP ; Energy reduction; Enzyme; Pilot scale refining; Reducing sugar assay;

    Sammanfattning : Thermomechanical pulping (TMP) is a highly energy intensive process where most of the energy is used in therefining of chips to fibres. Various ways of reducing the energy consumption have earlier been studied, for examplechange of refiner pattern, addition of various chemicals, and also some biochemical implementation in the form of fungus and enzymes. LÄS MER

  3. 7. High consistency refining of mechanical pulps during varying refining conditions : High consistency refiner conditions effect on pulp quality

    Master-uppsats, Institutionen för fysik, kemi och biologi; Institutionen för fysik, kemi och biologi

    Författare :Dino Muhic; [2008]
    Nyckelord :Thermomechanical pulping; high consistency refining; segment wear; housing pressure; feed pressure; mechanical pulping;

    Sammanfattning :   The correlation between pulp properties and operating conditions in high consistency (HC) refiners at Holmen Paper AB were studied. Two types of HC refiners were investigated: the Andritz RTS refiner at the Hallstavik Mill and the Sprout-Bauer Twin 60 refiner at the Braviken Mill. LÄS MER

  4. 8. Mechanical and chemical chip pre-treatment in mechanical pulp production

    Master-uppsats, Institutionen för fysik, kemi och biologi

    Författare :Malin Sjölin; [2008]
    Nyckelord :Mechanical pulping; TMP; CTMP; APMP; APTMP; alkaline-peroxide; electrical consumption; chip pre-treatment;

    Sammanfattning : The mechanical pulping industry has been developing throughout the years, due to competitive prices in the electricity market and good accessibility of wood. This has made it possible for such and “expensive” process to further develop. LÄS MER