摘要
为寻找强化间歇精馏过程的有效途径,在三角形螺旋填料旋转床中,以乙醇-水为实验物系,进行间歇精馏恒回流比操作性能研究。通过改变转速n、回流比R和进料质量分数wF,考察产品纯度和回收率的变化规律。研究结果表明:产品纯度wD和回收率η均随n增加先增大,后减小,即存在最佳转速nopt;随R的增大缓慢增大;产品纯度随wF的增加而增大,回收率η随wF的增加先增大后减小。在旋转填料床中的间歇精馏应在较小回流比和最佳转速条件下操作,且适合处理较高质量分数的原料。
In order to look for the effective way to enhance the mass transfer,constant reflux ratio batch distillation experiments in the rotating packed bed were made using ethanol-water binary system.The variation of average mass fraction and recovery were investigated by altering rotating speed n,reflux ratio R and mass fraction of ethanol wF.The results show that the average mass fraction and recovery of ethanol increase with increasing n,and exist the best rotating speed nopt.The average mass fraction and recovery of ethanol increase slowly with increasing R.The average mass fraction increase with increasing wF and the recovey of ethanol increase first but then decline increasing with wF.Therefore,batch distillation is suitable for processing the high mass fraction feed in totating packed bed and operating under small reflux ratio and low rotating speed.
出处
《现代化工》
CAS
CSCD
北大核心
2010年第S1期62-64,66,共4页
Modern Chemical Industry
基金
福建省教育厅科技基金资助项目(JB08001)
关键词
旋转填料床
恒回流比
间歇精馏
性能
rotating packed bed
constant reflux ratio
batch distillation
characteristic
