关键词: 过程控制, 动态建模, 数值模拟, 催化裂解, 两段提升管

Abstract:

The two-stage-riser catalytic pyrolysis technology of heavy oil for maximizing propylene, features the possibility of feedstock diversification, high-yield of propylene and high-value gasoline, which enables a bright future for the related industrial applications. Modeling, nonlinear analysis, and control are important aspects for achieving high mass/energy conversion and therefore improving the competitiveness of the TMP technology. This work concentrates on the dynamic modeling for process control purpose. First, mass and energy balance models for the first riser, the second riser, the stripper, the combustor, and the dense region of the regenerator are established and connected by the spent and regenerated catalyst flow among them, forming an integrated dynamic model of the TMP process. It showed that numerical simulation of the main process variables to perturbations in potential manipulated variables not only validates the effectiveness of the set model but also presents strong interactions among two risers and the regenerator system. In total, the built model is well-suited to be adopted as a reference model for subsequent nonlinear analysis and model-based advanced control investigation.

Key words: process control, dynamic modeling, numerical simulation, catalytic pyrolysis, two-stage-riser