工业渣油催化裂化过程六集总组合反应器模型

工业渣油催化裂化反应主要发生在提升管段和出口的沉降器段的复杂流体动力学区域。通过对工业现场装置流程和过程数据的分析,将发生裂化反应的整个反应器中提升管部分作为活塞流反应器(PFR)和沉降器部分作为全混流反应器(CSTR)的串联组合反应器,并按照渣油催化裂化反应特点建立了简化的6集总组分的串行和并行动力学反应网络模型。所建立的稳态催化裂化反应产率预测模型在数学上表现为提升管部分的微分方程组和沉降器部分的代数方程组。模型设置7个装置因数来校正模型的计算产率与实测产率之间的偏差,并采用工业现场数据回归装置因数。通过对工业装置数据的计算比较,得到的模型产率预测精度很好地满足在线软测量计算要求。

Reactor Model for Industrial Residual Fluid Catalytic Cracking Based on Six-lump Kinetic Model

A practical six lumps kinctic model for residual fluid catalytic cracking unit(RFCCU)was proposed. The catalytic cracking reactor was considered into two parts: the riser as plug flow reactor (PFR) and the settler as continuously stirred tank reactor (CSTR), which can be described by the ordinary differential equations (ODEs) and the nonlinear algebraic equations (AEs) respectively. Considering the industrial application condition, a kinetics model of six lumps residual catalytic cracking reaction with serial and parallel network was introduced. In order to reduce the deviation between model prediction and plant date observed, seven plant factors were set to correct the model, and these 7 plant factors were reqressed by the plant process data. The comparison of calculated results with industrial data shows that the model could discribe the products rate with satisfied accuracy. The proposed model is suitable for online industrial process soft sensor application.