LOPA方法在加氢装置安全完整性等级上的研究

Study on Safety Integrity Level in Hydrogenation Unit based LOPA Technology

加氢单元由于其生产工艺、物料、环境等方面的特殊性,极易发生火灾爆炸、高压串低压、超温事故。为保障加氢装置的安全生产,减少事故的发生及其给企业带来的严重后果,企业通常会引入安全仪表系统(SIS)对装置进行安全保护。本文基于保护层分析LOPA分析技术的基础上,阐述了如何合理、有效地分析安全仪表系统的每一个回路的安全完整性等级(SIL),并将保护层作用下的事故风险与风险可接受准则做对比,最后以某加氢装置为例对该过程给出了具体的分析过程与合理结果。

Due to the special properties in the process,material and environment in hydrogenation unit,it’s easy to lead to accidents,such as fire and explosion,overpressure,high temperature.Many enterprises begin to recommend the SIS to reduce the possibility and consequences of these accidents.This paper describes how to analyze SIL of each safety loop in safety instrument system by using the LOPA method,use the LOPA method to analyze the each existing protective layer,all under the combined action of accident risk and risk acceptance criteria were compared,and get a reasonable result.A concrete case study of hydrogenation unit was also provided to illustrate the process of determining the SIL based on LOPA.