轻烃芳构化装置吸收稳定系统模拟优化

摘要

In this paper,PROII was applied in a light hydrocarbon aromatization reaction product system to simulate the influence of recovery rate of light hydrocarbon in absorption tower,recycling process of dry gas,desorption column feed position and thereflux ratio of stabilizer on the absorption stability system.According to the simulation data,the process energy consumption of the entire system is low when the absorber light hydrocarbon recovery rate is about 97%.After condensing recovery of absorber overhead dry gas,more aromatics can be recovered and better economic benefits can be produced.The detailed condensate solution and proper condensing medium were depend on the plant supporting utility conditions.When the cold and hot streams double feeding mode with the minimum load was applied on the desorption column,one from the top of the tower and the other from the upper middle part.It is more reasonable when the stabilizer reflux ratio is about 3.0.%针对某轻烃芳构化反应产物，利用 PROII 软件对吸收塔轻烃回收率、干气回收方案、解吸塔进料位置以及稳定塔回流比对吸收稳定系统的影响进行模拟。根据模拟数据分析认为吸收塔轻烃回收率为97%左右时，整个系统工艺能耗比较适宜；吸收塔顶干气经过冷凝回收方案，可以回收更多的芳烃，产生更好的经济效益，具体冷凝方案需要结合厂区公用工程配套情况，选择合适的冷凝介质；解吸塔采用冷热双股进料方式时，一股进入塔顶，另外一股进料位置在塔体中部偏上的位置时，负荷最小；稳定塔回流比在3.0左右时，比较合理。