摘要
本文以速生桉木为原料,研究了液比对其在硫酸盐法蒸煮过程中甲醇生成的影响;在此基础上,建立了基于蒸煮液比和纸浆卡伯值预测甲醇生成量的数学方程,进而考察了小范围的液比波动对甲醇生成量的影响。结果表明:在给定的目标卡伯值下,采用高液比可显著降低甲醇的生成量;相比低终点卡伯值(16)蒸煮,采用高终点卡伯值(40)蒸煮可有效降低甲醇生成量28%-45%;而且,小范围的液比波动(2.5%)即可引起较大范围的甲醇生成量的波动(2.5%-7.7%)。因此,从控制甲醇生成的角度,在实际生产中使得液比的波动为正误差范围为宜。
This paper reported an investigation on the effect of wood-to-liquid ratio on methanol formation in eucalyptus kraft pulping.A mathematic equation was derived for predicting the amount of methanol generated during kraft pulping,based on the liquid ratio and kappa number of pulp.The result showed that if setting a target kappa number of 40,the use of higher liquid ratio can dramatically reduce the amount of methanol by 28%-45%.Furthermore,a small fluctuation（2.5%） in liquid ratio can bring large changes（2.5%-7.7%） in the amount of methanol formation.Therefore,it is better to control the fluctuation of liquid ratio within a positive margin in mill operation in terms of reducing methanol formation.
出处
《造纸科学与技术》
北大核心
2011年第3期16-18,21,共4页
Paper Science & Technology
基金
国家自然科学基金(21076091)
国家自然科学基金(21037001)
关键词
硫酸盐法蒸煮
甲醇
液比
卡伯值
kraft pulping
methanol
liquor ratio
kappa number
