- JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY
- 紙パ技協誌 (ISSN:0022815X)
- vol.36, no.1, pp.51-58, 1982
Lower energy and investment cost for the Medium Consistency (MC) O<SUB>2</SUB> system than for conventional High Consistency systems was the motivation for the development of the described MCO<SUB>2</SUB> system. After development work in a pilot plant, the described commercial MC system wasstarted up in June 1980, reducing the Kappa No. a part of the production from a continuous Hi-Heat digester from 45 to 25.<BR>The system incorporates, outside the MC oxygen mixer and hydraulic reactor, also a pressure diffuser for washing and a splitter for diverting of the pulp from the digester.<BR>The data shows that the pulp quality for the HC and MC systems are comparable. With lower energy and investment costs and comparable chemical consumption, the MC system, being more flexible for installation in old pulp lines, should make O<SUB>2</SUB> delignification more attractive than before.