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为了尽快实现超临界汽油中低温煤焦油加氢裂解工艺的工业化,利用ASPEN PLUS模拟煤焦油在超临界溶剂中的加氢过程,以获得整个工艺运行的基本参数。本文基于超临界汽油中低温煤焦油加氢裂解的中试试验数据,对超临界汽油中低温煤焦油加氢裂解工艺进行模拟。首先,煤焦油代表组份选自煤焦油中含量较高的组分,汽油溶剂在模拟中根据其沸点曲线定义为虚拟组分;其次,根据碳离子反应机理,所有的煤焦油代表组分发生裂解反应,并将所有反应输入模型;加氢裂解过程主要选用RK-SOAVE和BK10物性方法,超临界汽油在模拟过程中定义为亨利组分:最后,根据煤焦油加氢裂解的反应特征,模型中主要包含3个基本模块,即RYIELD、Separtor和PetroFrac,分别模拟加氢裂解、气液分离和常压分馏。模拟时将超临界汽油中低温煤焦油加氢裂解中试实验条件数据输入模型,模拟结果表明:模型预测值与实验值基本一致,表明该模型能较好的反映超临界汽油中低温煤焦油加氢裂解工艺过程。并利用模型对年处理15万吨的超临界汽油中煤焦油加氢裂解工艺进行优化设计,获得了工艺的基本参数和能耗,为超临界汽油中低温煤焦油加氢裂解工艺工业化提供了理论依据和设计参考。
In order to realize the industrialization of low temperature coal tar hydrocracking process in supercritical gasoline as soon as possible, ASPEN PLUS was used to simulate the hydrogenation process of coal tar in supercritical solvent to get the basic parameters of the whole process operation. Based on the pilot-scale experimental data of hydrocracking of low-temperature coal tar in supercritical gasoline, the hydrocracking process of low-temperature coal tar in supercritical gasoline was simulated. First, the coal tar representative component is selected from the higher content of coal tar components, the gasoline solvent in the simulation according to its boiling point curve is defined as a virtual component; Second, according to the carbon ion reaction mechanism, all the coal tar representing components occur Pyrolysis reaction, and input all the reactions into the model. The hydrocracking process mainly uses RK-SOAVE and BK10 physical properties. The supercritical gasoline is defined as the Henry component in the simulation process. Finally, according to the reaction characteristics of coal tar hydrocracking, There are three basic modules, RYIELD, Separtor and PetroFrac, which simulate hydrocracking, gas-liquid separation and atmospheric fractionation respectively. Simulation results show that the model predictive value is in good agreement with the experimental data, which indicates that the model can better reflect the low temperature coal tar oil in supercritical gasoline Hydrogen cracking process. And the model was used to optimize the design of coal tar hydrocracking process in the processing of 150,000 tons of supercritical gasoline. The basic parameters and energy consumption of the process were obtained, which provided the theory for the industrialization of low temperature coal tar hydrocracking process in supercritical gasoline Basis and design reference.