【摘要】 文章利用Aspen Plus化工模拟软件中的严格计算法RadFrac单元操作模块对椰子油脂肪酸进行了连续减压精馏分离模拟。考察了塔板数、回流比、进料位置对分离效果的影响。结果表明:采用两个精馏塔B1塔和B2塔串联操作,操作压强为2500 Pa(绝压),原料进料质量流率20 kg/h,B1塔理论板数为15,第8块塔板进料,回流比为2(体积比),塔顶可得到产物辛酸的质量流率为8.675 kg/h,质量分数可达98.58%及回收率可达99.83%。塔底物料经B2进一步分离,B2塔板数为15,第9块塔板进料,回流比为1,塔顶可得到产物癸酸的质量流率为10.86 kg/h,质量分数为99.79%及回收率为98.81%。模拟结果对实验研究及工业化生产具有指导意义。更多还原

【Abstract】 Simulation of continuous distillation of coconut oil fatty acids in the paper was researched by the strict calculation method RadFrac unit operation module of Aspen Plus software.Under the absolute pressure 2500 Pa the effect of continuous distillation of coconut oil fatty acids,including the stage numbers of distillation column,the number of feed stage,and reflux ratio was investigated.The results showed that when the flow rate of feed was 20 kg/h and two rectification towers were used,the operation parameters of B1 tower were as follows: the stage number for B1 tower was 15,the feed stage was No.8 and reflux ratio(volume ratio) was 2.Under the optimized parameters,the flow of top products caprylic acid was 8.675 kg/h,the mass fraction was 98.58 %,and the yield can achieve 99.83 %.The flow at the bottom was further separated in B2 tower.The operation parameters of B2 tower were as follows: the stage number for B1 tower was 15,the feed stage was No.9 and reflux ratio was 1.Under the optimized parameters,the flow of top products decoic acid was 10.86 kg/h,the mass fraction was 99.79 %,and the yield can achieve 98.81 %.更多还原