论文部分内容阅读
以绿竹为原料,采用不同热水预抽提时间以及蒸煮前将热水预抽提液与竹片分离的方法,通过对比KP法制浆黑液残碱含量以及KP浆的卡伯值、得率、黏度含量等探讨了对硫酸盐法制浆性能的影响。结果表明:热水预抽提可以提高竹片蒸煮脱木素效率,达到相同的脱木素程度(相同卡伯值20)可节省约52%的有效碱用量。在预抽提时间80 min时,浆料的最低卡伯值为7.03。另外,预抽提工艺有利于提高纸浆的黏度,同时纸浆的得率也产生了较大的下降。
Taking the green bamboo as the raw material, different pre-extraction time of hot water and the method of separating the hot water pre-extraction liquid and the bamboo before cooking were compared. By comparing the content of residual alkali in KP black liquor and Kappa number, Yield, viscosity content, etc. discussed the impact of the kraft pulping performance. The results showed that pre-extraction of hot water could improve the cooking delignification efficiency of bamboo, and the same delignification degree (the same Kappa number of 20) could save about 52% of available alkali dosage. At the pre-extraction time of 80 min, the minimum kappa number of slurry was 7.03. In addition, pre-extraction process is conducive to improving the viscosity of the pulp, while pulp yield also had a greater decline.