流程模拟技术在石家庄炼化Ⅰ套催化装置上的应用

通过Aspen Plus软件,建立石家庄炼化Ⅰ套催化装置除反-再部分外的流程模拟稳态模型,包括:分馏塔、吸收塔、解吸塔、稳定塔和再吸收塔流程模型,本流程模拟中的分馏塔、吸收塔、解析塔、稳定塔均采用Petro Frac模型,其中,分馏塔和稳定塔均为板式塔,解析塔为板式、填料混合装填,吸收塔、再吸收塔为填料塔。通过模拟工艺过程计算、灵敏度分析,确定较佳的操作条件,以指导生产,调整操作参数,旨在满足产品质量的前提下,达到节能降耗、提高装置经济效益的目的。实际运用过程中,找到吸收塔、解析塔、稳定塔相关变量的关联度,确定了最佳的优化操作参数,稳定塔顶回流量由70t/h下降至60t/h,塔底热源耗能减少266.714kW/h;解析塔底温度由118℃下降至110℃,重沸器热源减少381.14kW/h,合计节省蒸汽消耗0.73t/h,装置全年实现节能效益71.1万元。

The Application of Aspen Plus Process Simulation Technology in 1# FCCU

With the help of the Aspen Plus software,technicians established a process simulation steady-state model for Sinopec Shijiazhuang Refining and Chemical Company′s No.1 catalytic unit excluding the reaction-regeneration system.Components modeled included the fractionation column,the absorption column,the desorption column,the stabilizer and the re-absorption column.Simulation of the fractionation column,the absorption column,the desorption column and the stabilizer used the Petro Frac model.The fractionation column and stabilizer are plate columns,while the desorption column uses blended loading of the plate type and packing column type and the absorption column and the re-absorption column are packing columns.By modeling process calculations and analyzing sensitivity,technicians determined the optimum operating conditions for optimizing production and operating parameters with the aim of saving energy and raising the economic benefits of the unit while ensuring product quality.In applying the modeling results in actual production,these technicians identified the relevance between relevant variables of the absorption column,the desorption column and the stabilizer and determined the optimum operating parameters.The amount of reflux in the stabilizer dropped to 60t/h from 70t/h and the consumption of energy from the heat source at the bottom of the column dropped by 266.714kW/h.The temperature at the bottom of the desorption column dropped to 110℃ from 118℃,the consumption of energy from the heat source in the reboiler dropped by 381.14kW/h.A total of 0.73t/h of steam has been saved and annual economic benefits from energy savings amount to 711,000 yuan.