| 摘要 |
The invention relates to a system and a process for the oxygen delignificati on of pulp which consists of lignocellulose-containing material and whose mean concentration is 8-18 % pulp consistency, in at least two stages. The invention is characterized in that oxygen delignification takes place in a process sequence consisting of: a first lamp (1), followed by a first oxygen mixer (3), followed by a first delignification zone (6) and, directly afthat , followed by a second steam mixer (8), followed by a second pump (4), followe d by a third oxygen mixer (5) and, finally, a second delignification zone (10) . This makes it possible, in an industrial process, to exploit the kinetics of oxygen delignification optimally in order to obtain selective oxygen delignification at low installation cost and low operating cost, even if onl y low-pressure steam is available.
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