济南炼化气体分馏装置流程模拟优化

Process Simulation and Optimization for Sinopec Jinan Company′s Gas Fractionation Unit

中国石化济南分公司采用Aspen Plus流程模拟软件,建立两套气体分离装置模型。对其工艺流程进行了模拟,计算结果与装置现场实际参数十分吻合。在此基础上,分析各工艺参数在不同条件下对产品质量及能耗的影响。在保证产品质量达标前提下,根据现有生产条件,离线模拟最佳的操作参数。针对存在的问题,依据模拟结果对操作参数进行优化,达到了降低能耗、提高产品收率的目的。通过在环境温度较低情况下脱丙烷塔降压操作,降低装置能耗,优化脱丙烯塔进料位置,提高丙烯回收率,调整C4塔进料量,增产MTBE,优化脱乙烷塔,停运进料泵,实现装置挖潜增效319.25万元/a。该模型的应用表明,Aspen Plus软件能够根据生产条件的变化,及时分析装置运行状态,模拟最优参数,指导生产,实现装置效益的最大化。

Technicians at Sinopec Jinan Company established two sets of models using Aspen Plus software to simulate the process of the company′s gas separator.Calculation results match perfectly the actual parameters of the unit.Based on the calculation results,the influence of various process parameters under different operating conditions on product quality and energy consumption was analyzed.While ensuring product quality,the technicians identified the optimum operating parameters through offline simulation under the existing conditions.In order to address existing problems,they optimized the operating parameters based on the simulation results and achieved the objectives of saving energy and raising product yields.Through the use of a series of optimization measures,annual revenues from the unit rise 3.1925 million yuan.These measures include reducing pressure for the depropanizer when the atmospheric temperature is low,cutting energy consumption of the unit,optimizing the feeding position for the depropenizer,raising the recovery of propane,adjusting the amount of feedstock into the C4 column,increasing the share of output of MTBE,optimizing the dethanizer and stopping the charging pump.The application of the model shows that the Aspen Plus software can timely analyze the status of unit operation following the changes in production conditions and simulate for the optimum parameters to guide production,thereby maximizing the economic efficiency of units.