Aspen Plus模拟计算在连续重整装置增产碳五中的应用

Application of Aspen Plus simulated calculation in increasing output of C_5 in continuous reforming unit

为了增产碳五,利用Aspen Plus软件中Rad Frca严格计算模块和BK 10热力学方法对连续重整装置预加氢系统脱异戊烷塔进行流程模拟计算,并考察了回流比、塔顶压力对脱异戊烷塔操作的影响。结果表明:模拟结果与实际操作一致,脱异戊烷塔塔顶、塔底温度模拟值与实际值相差约为3℃,塔顶产品中碳五质量分数大于99%;在脱异戊烷塔回流比为1. 6,塔顶压力为0. 40 MPa,塔底再沸器热负荷为11. 10 MW,塔顶冷凝器热负荷为7. 98 MW的最优条件下,加氢裂化轻石脑油进料量为27. 0 t/h,塔顶碳五产品产量为34. 4 t/h,较原有工况增产16. 4 t/h。

In order to increase the output of C5,the Rad Frca strict calculation module and BK 10 thermodynamic method in Aspen Plus were used to simulate the process of the deisopentane tower in the prehydrogenation system of the continuous reforming unit,and the influence of reflux ratio and top pressure on the operation of deisopentane tower was investigated. The results showed that the simulated result was consistent with the actual operation,the gap between simulation value and actual value of deisopentane tower top and bottom temperature was about3 ℃,the mass fraction of C5 in the tower top products was more than 99%. Under the optimal conditions of the reflux ratio of the deisopentane tower1. 6,the top pressure of the tower 0. 40 MPa,the heat load of the reboiler on the bottom of the tower11. 10 MW,and the heat load of the condenser on the top of the tower 7. 98 MW,the feeding amount of hydrocracking light naphtha was 27. 0 t/h,and the output of C5 fraction at the top was 34. 4 t/h,increasing by 16. 4 t/h compared with the original condition.