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为了保障甲苯回收装置的安全运行，在对已发事故进行分析的基础上，采用了事故树分析方法建立了甲苯回收装置火灾的事故树，通过对该事故树的分析，找出了甲苯回收装置在设计和运行阶段存在的主要问题，并提出了有针对性的改进方案和预防措施，以降低甲苯回收装置发生事故的风险。“,”In order to ensure the safety operation of methylbenzene recovery equipment,a fault tree about methyl-benzene recovery equipment is established by the fault tree analysis which is based on the analysis of the accidents. The major risk sources in the design and operation phases are figured out through the analysis of the fault tree.Fur-thermore,improvement programs and preventive measures are proposed to reduce the accident risk of methylbenzene recovery equipment.