ASPEN PLUS在顺酐回收工艺模拟中的应用

The application of ASPEN PLUS software on the simulation of solvent absorption in maleic anhydride plant

应用化工流程模拟软件ASPEN PLUS对顺酐溶剂回收工艺进行模拟。使用经K-D混合规则修正了的Soave-Redlich-Kwong方程进行热力学计算,并对数据库中缺失的物性参数进行补充以获得更准确的模拟结果。通过灵敏度分析,得到最优的操作参数:吸收剂入塔最优温度40～45℃,顺酐混合气入塔最优温度48～56℃,吸收剂循环流量24 214 kg/h。根据分析优化结果对原工艺提出改造方案,经过模拟计算预测,改造后的工艺与原工艺相比可以节省能量5 501.948 MJ/h,同时减少一个换热器的建造和维护费用。

ASPEN PLUS has been used to simulate the maleic anhydride absorption process. The Soave-Redlieh-Kwong equation modified with K- D mixing rule has been used to get thermodynamic calculations, and the missing physical parameters of components in the database have been supplied from literature to obtain a more accurate simulation results. With the toolbox of sensitivity analysis, the optimal operating parameters have been generated： the optimal temperature of absorbent fed into the tower is 40 - 45 ℃ ; the optimal temperature of maleic anhydride mixture fed into the tower is 48 - 56 ℃ ; the optimal flow rate of circulating absorbent is 24 214 kg/h. According to the analysis results, an alteration project is presented which can save 5 501. 948 MJ/h and reduce the expense of one heat exchanger compared to the original process.