高压空冷器失效机理分析及优化措施

Failure mechanism analysis and optimization measures of high pressure air cooler

介绍了某加氢裂化装置高压空冷器运行中出现的堵塞、变形及泄漏情况,并对高压空冷器的受力进行了分析。采用有限元应力分析软件进行计算机模型的建立及应力计算,同时又从空冷管布局、原料性质、催化剂、缓蚀剂及注水量等方面分析了高压空冷器堵塞、变形的外部原因。通过采取工艺操作优化、现场维护优化及紧急情况下的特护3个措施进行优化改进,彻底消除了空冷器系统的流动腐蚀、堵塞、变形等安全隐患,降低系统运行风险,保障加氢裂化装置长周期稳定运行。

The blockage, deformation and leakage of high pressure air cooler in hydrocracking unit are introduced, and the stress of high pressure air cooler is analyzed. The finite element stress analysis software is used to establish the computer model and calculate the stress. The external causes of blockage and deformation of high pressure air cooler are analyzed from the aspects of layout of air cooling tube, properties of raw materials, catalyst, corrosion inhibitor and water injection rate. By adopting three measures of process operation optimization, site maintenance optimization and emergency special protection, the potential safety hazards such as flow corrosion,blockage and deformation of air cooler system are eliminated completely, the system operation risk is reduced, and the long-term stable operation of hydrocracking unit is guaranteed.