:A Computer Simulation
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概要
- 論文の詳細を見る
Changes occur in white liquor composition when kraft white liquor is oxidized to produce sodium polysulfide and sodium hydroxide. The use of the oxidized white liquor in pulping increases the yield of pulp obtained, and lowers the organic content of the black liquor. The impact of these changs in liquor composition upon recovery operations is examined using computer analyses. Material and energy balances are given for various restraints on pulp production. The particular areas examined are the evaporator system, the recovery boiler, and the recausticizing system. It is shown that the benefits of increased yield can vary greatly depending upon the restraints on production, the cost of wood. and the cost of replacement fuel. While this paper deals specifically with polysulfide pretreatment, the conclusion that the benefits of increased yield are dependent upon specific pulp mill situations will apply to other means for incrasing yield.
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