以某化工厂丙烯聚合关键设备——环管反应器为例,通过熟悉工艺流程,选取合适的关键变量,确定变量之间的影响关系,建立用于故障诊断的SDG模型。在与工厂工艺操作手册及仿真模型模拟分析校对该模型后,对该模型进行了故障诊断分析。实验结果表明,基于SDG模型的故障诊断能够准确地揭示故障传播路径。 Taking the key equipment of a propylene polymerization plant in a certain chemical plant - loop reactor as an example, through familiarizing with the technological process, selecting appropriate key variables and determining the relationship between variables, the SDG model for fault diagnosis is established. The model was analyzed after the model was simulated with the factory process manual and the simulation analysis of the simulation model. The experimental results show that fault diagnosis based on SDG model can accurately reveal the fault propagation path.