基于基准假组分模型的催化裂化反应-再生系统动态模拟

Dynamic Simulation of FCC Reactor-Regenerator System Based on Standard Pseudo-Component Kinetic Model

为实现催化裂化装置反应-再生系统动态模型的原料油切换操作模拟,建立了基准假组分动力学模型。该动力学模型根据原料的实沸点蒸馏曲线数据计算各原料基准假组分的质量分数,并模拟原料油性质的变化。以工业生产数据为基础,确定了8个动力学参数,并对模型计算结果进行了验证。在动力学模型基础上,结合所建立的沉降器汽提段和再生器动态模型,对催化裂化反应-再生系统进行了原料切换开环动态模拟。结果表明,模型具有较高的精确度,对不同性质的原料具有较好的适应性;所建模型可以实现原料切换操作;几个主要变量的变化趋势符合反应-再生过程规律。

The standard pseudo-component kinetic model was developed to implement changing feedstock in dynamic simulation of fluid catalytic cracking （FCC） process. By using the same kinetic model for different types of feedstock, the mass fraction of each feedstock standard pseudo- component was calculated according to the true boiling point （TBP） curve. The eight parameters of the kinetic model were estimated and proved by industrial data. The dynamic models of disengaging- stripping section and regenerator were also developed to perform the dynamic responses to changes of feedstock type. The results showed that the kinetic model possessed high accuracy and good suitability for different feedstock. By the model the operation of feedstock change could be performed. Finally, the dynamic changes of several major process variables agreed with the process rule of reactor-regenerator system.