碳三与碳四分离装置节能降耗的模拟与优化

为了降低140万t/a碳三与碳四分离装置的能耗,利用Petro-SIM流程模拟软件对装置流程进行模拟与优化,建立了碳三与碳四分离装置操作模型,并依据该模型提出了优化方案.结果表明:通过模型计算得到的产品质量指标与实际产品相近,表明该模型可用于优化指导生产;通过模拟计算,在加工负荷为90％,脱异丁烷塔操作压力由0.93 ...

Simulation and optimization for energy saving and consumption reduction of C3 and C4 separation unit

In order to reduce the energy consumption of a 1.4 Mt/a C3 and C4 separation unit， the simulation model for the C3 and C4 separation unit was established， the simulation and optimization for this unit was carried out by Petro-SIM process simulation software， and an optimization scheme was proposed according to the model. The results showed that the product quality indexes calculated by the simulation model were close to that of the actual product， which proved that the model could be used to optimize and guide the unit′s production. Under the processing capacity of 90% and the operating pressure of the iso-butane tower reduced from 0.93 MPa to 0.65 MPa， the mole fractions of propane， iso-butane and n-butane were 97.26%， 98.00%， and 90.00% respectively by simulation， and the steam saving could be 9.34 t/h theoretically. After the optimization operation， the actual steam saving was 9.72 t/h， corresponding to 7.506 million yuan per year.