裂解C_5反应精馏工艺的模拟计算

Simulation of Reactive Distillation Process for Separation of Steam Cracking C_5

对裂解C5馏分反应精馏工艺建立了数学模型,利用Aspen Plus流程模拟软件对反应精馏工艺进行了模拟计算。分析了理论塔板数、进料板位置、回流比及塔板停留时间对精馏过程的影响,得出了裂解C5馏分反应精馏分离的工艺指标最优值。计算结果表明,最佳工艺条件为：理论塔板数为100~120块,进料板位置为第22~26块塔板,回流比为10~15,塔板停留时间为10~15 s。根据选定的工艺条件,在进料流量为18 750.0 kg/h、进料温度为60℃、进料位置为第24块塔板、全塔理论塔板数为100块、回流比为10、塔板停留时间为10 s的条件下,异戊二烯的收率可达98.15%,环戊二烯的转化率达93.23%,双环戊二烯（DCPD）选择性达98.75%,DCPD的收率为92.07%,达到了裂解C5馏分反应精馏工艺的指标要求。

The reaction distillation process of steam cracking C5 fraction was simulated by means of the Aspen Plus software. The influences of theoretical plate number, feeding plate position, reflux ratio and plate residence time on the distillation process were investigated, and the optimal process parameters were obtained： the theoretical plate number 100-120, feeding plate position 22-26th, reflux ratio 10-15, plate residence time 10-15 s. Under the optimal conditions of feeding flowrate 18 750.0 kg/h, feeding temperature 60 ~C, feeding position 24th plate, theoretical plate number 100, reflux ratio 10 and plate residence time 10 s, the yield of isoprene, conversion of cyclopentadiene, selectivity to dicyclopentadiene （DCPD） and yield of DCPD could reach 98.15%, 93.23%, 98.75% and 92.07% respectively, which could meet the requirements of the separation process.