SIL在天然气净化厂控制系统安全分析中的应用  

Application of Safety Integrity Level (SIL) and the Hazard and Operability Analysis (HAZOP) in a natural gas purification plant

作　　者：夏太武[1] 袁树海[1] 宋彬[1] 张炜[1] 彭云[2] 熊生勇[2] 李范书[1] 

机构地区：[1]中国石油西南油气田公司天然气研究院 [2]中国石油西南油气田公司重庆天然气净化总厂万州分厂

出　　处：《天然气工业》2011年第3期92-96,117,共5页Natural Gas Industry

基　　金：中国石油天然气股份有限公司课题"HAZOP分析在天然气净化厂的应用研究"(编号:2009D1502-06)

摘　　要：目前针对天然气净化厂控制系统的安全分析主要采用的是危害和可操作性分析法(HAZOP),该方法主要从工艺流程的参数偏差方面分析设计上存在的缺陷,而对仪表控制系统不能作更为详细的风险评估,而单独的安全完整性等级分析法(SIL)评估也不能完全识别出控制系统中存在的不足。为此,提出了一种将SIL与HAZOP结合使用的分析方法,充分利用HAZOP分析的成果,对HAZOP识别出来的问题或缺陷再进行SIL评估;而另一方面,对没有进行HAZOP分析的安全仪表系统(SIS)进行单独的SIL评估,弥补了HAZOP对自控风险分析的不足。应用结果表明:该方法在天然气净化厂是适用有效的,能为天然气净化厂改进SIS系统及其他技术改进提供指导。The Hazard and Operability Analysis(HAZOP) method has been commonly used for the safety analysis of the safety instrumented system in a natural gas purification plant,which only focuses on the defects in terms of the designed parameters errors in the process without any detailed risk assessment on such system.On the other hand,the Safety Integrity Level(SIL) alone can not completely identify the defects of the safety instrumented system.In view of this,a method based on SIL and HAZOP was put forward to have the SIL done first on the problems or defects analyzed from HAZOP and then on the safety instrumented system(SIS) which has not been done by the HAZOP,covering the shortage of HAZOP in the self-control analysis.Cases of this combination method have been proved to be effective and valuable for the technical innovation of SIS and other systems in natural gas purification plants.

关 键 词：天然气净化 风险 安全完整性等级 安全仪表系统 危害和可操作性分析 风险图表法 

分 类 号：TE978[石油与天然气工程—石油机械设备]