摘要
利用Aspen plus对苯/甲苯/邻二甲苯体系的直接分离序列和间接分离序列两种方案进行模拟分析,确定了最佳工艺条件;然后,对两种方案的能耗和固定成本进行比较,结果表明前者较后者固定成本节约7.62%,能耗成本节约9%,年度总成本节约8.87%;最后分别用斜率判据、温度增益判据和恒温板判据三种方法确定精馏塔的灵敏度板位置并建立了精馏系统的控制结构,通过动态模拟得出系统面临进料流量和进料组成扰动时,控制不同灵敏度板的流量、再沸器热负荷、塔板温度和产品纯度的过渡分析曲线,从而得出最佳温度控制板位置。
With the help of Aspen plus,the optimum conditions were were firstly determined through the simulation analysis of both direct and indirect separation sequence schemes for the benzene/toluene/ortho-xylene separation system.Then,by comparing the energy consumption and fixed cost of the two schemes,it was found that the direction separation sequence scheme saved 7.61%in fixed cost,9%in energy consumption and 8.87%in total annual cost in comparison with the indirect separation sequence scheme.Finally,by using slope criterion,a temperature gain criterion and constant temperature plate criterion,the sensitivity plate position was determined and the control structure of distillation system was established.Through dynamic simulation,the transition analysis curves of various sensitivity plates＇ flux,reboiler heat load,plate temperature and product purity when the system was faced with feed flow or feed composition disturbance were obtained,thus acquiring the optimum position of temperature control plate.
出处
《山东科技大学学报（自然科学版）》
CAS
2015年第5期6-13,共8页
Journal of Shandong University of Science and Technology(Natural Science)
关键词
芳烃精馏
稳态模拟
动态控制
经济优化
灵敏度板
aromatic distillation
steady simulation
dynamic control
economic optimization
sensitivity plate
