运用Aspen Plus软件,以BK10为热力学方法,对50万t/a常压装置进行模拟优化研究。通过与标定数据对比分析,验证了模拟计算的可行性。基于现场条件及控制改造成本等因素,提出了“闪蒸塔+常压塔”替代“初馏塔+常压塔”改造方案,并对改造后的方案进行了换热网络优化,同时提出了优化措施。模拟结果表明,改造后的方案轻油收率提高7.15%,冷负荷降低26.89%。 Using Aspen Plus software and BK10 as thermodynamic method, the 500,000 t / a atmospheric pressure unit was simulated and optimized. By comparing with calibration data, the feasibility of simulation is verified. Based on the on-site conditions and the cost of control reforming, the reconstruction scheme of “flash tower + atmospheric tower” instead of “pre-tower + atmospheric tower” was put forward and the optimized heat exchanger network was optimized , At the same time proposed optimization measures. The simulation results show that the light oil yield of the modified scheme increases by 7.15% and the cooling load decreases by 26.89%.