Studies on industrial digesters and cooking performance – Methods and applications (Helsinki University of Technology)

ABSTRACT Industrial pulp cooking reactors, digesters, were introduced in the early stages of chemical pulping technology for chemical liberation of fibres from wood chips and other lignocellulosic materials. With cooking temperatures of 20 – 80 °C above the boiling point of water and strong chemicals such as sodium hydroxide, suiphide or suiphite, digesters had to be sturdy and big. When…