针对中压加氢裂化生产过程存在很大的火灾、爆炸、毒害等危险性的特点 ,以加氢裂化反应器出口至冷高压分离器进口之间管线为分析节点 ,对工艺参数流量可能发生的各种偏差进行了危险和可操作性研究 ,找出了偏差发生的原因及可能导致的后果 ,提出了相应的控制措施 ,对提高装置的安全可靠性 ,预防和减少事故发生具有重要作用 For the medium pressure hydrocracking production process there is a big fire, explosion, poisoning and other dangerous characteristics of the hydrocracking reactor outlet to the cold high pressure separator inlet pipeline between the analysis node, the process parameters of the flow may occur Various deviations were studied in danger and maneuverability, and the causes and possible consequences of the deviations were found. Corresponding control measures were put forward, which played an important role in improving the safety and reliability of the devices and preventing and reducing accidents