热集成变压分离碳酸二甲酯-甲醇的优化与控制
发布时间：2018-07-23 08:33
【摘要】：利用Aspen Plus软件对碳酸二甲酯-甲醇物系,提出了热集成变压精馏新工艺,以年度总费用(TAC)最小为目标函数进行经济优化,优化结果显示可以节约能耗33.82%,TAC节省25.97%。在动态控制系统中,针对常压塔温度分布均匀、灵敏板选择困难的问题,给出一种简单有效的导斜率判据方法。在此基础上,研究了常压塔不同灵敏板以及不同控制结构对完全热集成工艺动态可控性的影响。结果表明:常压塔第29块塔板作为灵敏板的组成/温度串级控制结构CSC,可以有效处理±10%进料流量和进料组成扰动。对于超过10%进料流量和组成扰动,高压塔(HPC)压力波动大、产品不易控制的特点,在CSC基础上建立的压力-补偿温度控制结构CSD,使两塔产品的稳态余差较小,可以处理±20%的进料流量和组成扰动,实现更稳健的动态控制。
[Abstract]:Using Aspen Plus software, a new process of thermo-integrated pressure swing distillation was proposed for DMC-methanol system. The minimum annual total cost (TAC) was taken as the objective function for economic optimization. The results showed that the energy consumption could be saved by 33.82% TAC and 25.97%. In the dynamic control system, a simple and effective method of slope conductivity criterion is presented to solve the problem of uniform temperature distribution of atmospheric pressure tower and difficulty in selecting sensitive plate. On this basis, the effects of different sensitive plates and different control structures on the dynamic controllability of the fully integrated thermal process are studied. The results show that as the composition / temperature cascade control structure of the sensitive plate, the 29 trays of the atmospheric pressure tower can effectively deal with 卤10% feed flow and the disturbance of the feed composition. For more than 10% feed flow and component disturbance, the pressure fluctuation of high pressure tower (HPC) is large and the product is not easy to control. The pressure compensation temperature control structure CSD based on CSC makes the steady-state residual difference of the two tower products small. It can deal with 卤20% feed flow and component disturbance, and realize more robust dynamic control.
【作者单位】： 青岛科技大学化工学院;
【基金】：山东省自然科学基金项目(ZR2013BM001)
【分类号】：TQ028
[Abstract]:Using Aspen Plus software, a new process of thermo-integrated pressure swing distillation was proposed for DMC-methanol system. The minimum annual total cost (TAC) was taken as the objective function for economic optimization. The results showed that the energy consumption could be saved by 33.82% TAC and 25.97%. In the dynamic control system, a simple and effective method of slope conductivity criterion is presented to solve the problem of uniform temperature distribution of atmospheric pressure tower and difficulty in selecting sensitive plate. On this basis, the effects of different sensitive plates and different control structures on the dynamic controllability of the fully integrated thermal process are studied. The results show that as the composition / temperature cascade control structure of the sensitive plate, the 29 trays of the atmospheric pressure tower can effectively deal with 卤10% feed flow and the disturbance of the feed composition. For more than 10% feed flow and component disturbance, the pressure fluctuation of high pressure tower (HPC) is large and the product is not easy to control. The pressure compensation temperature control structure CSD based on CSC makes the steady-state residual difference of the two tower products small. It can deal with 卤20% feed flow and component disturbance, and realize more robust dynamic control.
【作者单位】： 青岛科技大学化工学院;
【基金】：山东省自然科学基金项目(ZR2013BM001)
【分类号】：TQ028
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