重整重芳烃综合利用可行性分析

Feasibility Analysis of integrated utilization of reforming heavy aromatic hydrocarbons

某化工厂重芳烃来自2套140×10^(4) t/a连续重整装置二甲苯塔底油,主要是C_(9)以上组分,C_(10)及C_(10)^(+)芳烃组分占比80%以上。目前该化工厂主要将重芳烃送至下游某化工厂精馏分离处理。为应对将来重芳烃征收消费税的不利形势、BTX产品结构与市场需求存在偏差及解决后路受制于下游化工厂的局面,该企业通过对重芳烃进加氢裂化装置、重油催化裂化装置、切割后综合利用、进汽柴油池、轻质化加工试验等几种处理方案综合分析、比较,最终确定采用重芳烃进柴油池。长远来看,重芳烃轻质化加工技术可以有效提高重芳烃资源的利用率。

Heavy aromatic hydrocarbons in a chemical plant,produced from two sets of xylene tower bottoms of 140×10^(4)t/a continuous reforming unit,mainly included C_(9) components,C_(10) and C_(10)^(+) aromatics components accounted for more than 80%.At present,the chemical plant mainly sent heavy aromatic hydrocarbons to a downstream chemical plant for distllation separation.In order to solve the adverse situation of heavy aromatics consumption tax in the future,the deviation between BTX product structure and market demand and the production subject to the downstream chemical plant,the company had comprehensively analyzed and compared several treatment schemes on heavy aromatics,such as sentto hydrocracking unit,heavy oil catalytic cracking unit,gas-diesel tank,comprehensively utilized after cutting,ormade light processing test,and found it was the most feasible method to be sent to gas-diesel tank.In the long tern,the light processing technology of heavy aromatics was more feasible and could effectively improve the utilization rate of heavy aromatics.