发明名称 System och förfarande för syragasdelignifiering av massa av lignocellulosahaltigt material
摘要 The invention relates to a system and a process for the oxygen delignification of pulp consisting of lignocellulose-containing material whose mean concentration is 8-18% pulp consistency, in at least two stages. The invention is characterized in that the oxygen delignification takes place in a first stage with a short dwell time of approx. 3-6 minutes, at a low temperature of approx. 85 DEG C and under a low pressure of approx. 0-4 bar, followed by a concluding stage with a longer dwell time of approx. 50-90 minutes, at a higher temperature of approx. 100 DEG C and under a higher pressure of approx. 8-10 bar. This makes it possible, in an industrial process, to exploit the kinetics of the oxygen delignification in an optimal manner for the purpose of obtaining a selective oxygen delignification at low installation cost and at low operating cost. <IMAGE>
申请公布号 SE9902586(D0) 申请公布日期 1999.07.06
申请号 SE19990002586 申请日期 1999.07.06
申请人 KVAERNER PULPING AB 发明人 HAAKAN *DAHLLOEF;MARTIN *RAGNAR
分类号 D21C9/10;D21C9/147;(IPC1-7):D21C/ 主分类号 D21C9/10
代理机构 代理人
主权项
地址