化工装置安全仪表系统功能安全评估体系的研究与应用
发布时间：2019-06-03 23:21
【摘要】：随着现代工业的不断发展,化工行业生产过程的安全问题越来越受到人们的关注；化工装置中安全仪表系统(SIS, Safety Instrumented System)是保障生产安全的关键,如何准确及时的评估安全仪表系统功能安全成为了人们关注的焦点。目前安全仪表系统功能安全的概念还没有在国内安全评估领域得到推广和普及,国内更是缺乏评估安全仪表系统统一的标准和规范,如何建立起一套完整的安全评估体系已经成为当下急需讨论和解决的问题。 应上海特种设备质量监督检验技术研究院的要求,本项目对化工装置安全仪表系统功能安全评估的相关内容进行了研究,主要做了以下工作：查阅功能安全相关国际标准及相关文献资料,通过调研与探索,总结安全评估过程中对安全仪表系统可靠性建模方法,并进行比较。基于Markov模型在VC++环境下,应用MFC框架及Matlab的COM组件,开发了功能安全安全完整性等级SIL(Safety Integrity Level)计算评估软件,该软件可以准确的实现不同冗余结构的安全仪表系统的建模以及相关失效参数PFD(Probability of Failure on Demand), PFS(Probability of Failing Safely),及SIL等级的计算,从而可以有效的应用十安全评估的过程中,将定性评估过度到定量评估,提高了评估的准确性。凭借开发的评估软件,对德固赛化工装置的一套过压保护安全仪表系统进行功能安全评估,提出了系统安全性存在的不足,给出改进建议,并对改进后的系统进行分析探讨。对现有的Markov模型在建模方式上进行改进,对于某些冗余结构中包含诊断模块的安全仪表系统考虑诊断模块失效率的影响建立新模型,并对结果做了分析和讨论；分析非均匀系统的Markov建模,并通过计算证明其实用性。
[Abstract]:With the continuous development of modern industry, people pay more and more attention to the safety of production process in chemical industry. Safety instrument system (SIS, Safety Instrumented System) in chemical plant is the key to ensure production safety. How to evaluate the functional safety of safety instrument system accurately and in time has become the focus of attention. At present, the concept of functional safety of safety instrument system has not been popularized and popularized in the field of domestic safety assessment, and there is a lack of unified standards and specifications for evaluating safety instrument system in China. How to establish a complete safety assessment system has become an urgent problem to be discussed and solved. According to the request of Shanghai Institute of quality Supervision and Inspection Technology for Special equipment, the related contents of functional safety assessment of safety instrument system for chemical plant have been studied in this project. The main work is as follows: consult the relevant international standards and related literature of functional safety, through investigation and exploration, summarize the reliability modeling methods of safety instrument system in the process of safety assessment, and compare them. Based on Markov model in VC environment, the SIL (Safety Integrity Level) calculation and evaluation software of functional security integrity level is developed by using MFC framework and COM component of Matlab. The software can accurately realize the modeling of safety instrument system with different redundant structures and the calculation of related failure parameters PFD (Probability of Failure on Demand), PFS (Probability of Failing Safely), and SIL levels. Therefore, the qualitative evaluation can be overdone to the quantitative evaluation in the process of effectively applying the ten safety assessment, and the accuracy of the evaluation can be improved. With the help of the developed evaluation software, the functional safety evaluation of a set of overvoltage protection safety instrument system in Degusai Chemical Plant is carried out, the shortcomings of the system safety are put forward, the suggestions for improvement are given, and the improved system is analyzed and discussed. The existing Markov model is improved on the modeling method, and a new model is established for the safety instrument system with some redundant structures containing diagnosis modules, which takes into account the influence of the failure rate of the diagnosis module, and the results are analyzed and discussed. The Markov modeling of non-uniform system is analyzed, and its practicability is proved by calculation.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TQ086
本文编号：2492300
[Abstract]:With the continuous development of modern industry, people pay more and more attention to the safety of production process in chemical industry. Safety instrument system (SIS, Safety Instrumented System) in chemical plant is the key to ensure production safety. How to evaluate the functional safety of safety instrument system accurately and in time has become the focus of attention. At present, the concept of functional safety of safety instrument system has not been popularized and popularized in the field of domestic safety assessment, and there is a lack of unified standards and specifications for evaluating safety instrument system in China. How to establish a complete safety assessment system has become an urgent problem to be discussed and solved. According to the request of Shanghai Institute of quality Supervision and Inspection Technology for Special equipment, the related contents of functional safety assessment of safety instrument system for chemical plant have been studied in this project. The main work is as follows: consult the relevant international standards and related literature of functional safety, through investigation and exploration, summarize the reliability modeling methods of safety instrument system in the process of safety assessment, and compare them. Based on Markov model in VC environment, the SIL (Safety Integrity Level) calculation and evaluation software of functional security integrity level is developed by using MFC framework and COM component of Matlab. The software can accurately realize the modeling of safety instrument system with different redundant structures and the calculation of related failure parameters PFD (Probability of Failure on Demand), PFS (Probability of Failing Safely), and SIL levels. Therefore, the qualitative evaluation can be overdone to the quantitative evaluation in the process of effectively applying the ten safety assessment, and the accuracy of the evaluation can be improved. With the help of the developed evaluation software, the functional safety evaluation of a set of overvoltage protection safety instrument system in Degusai Chemical Plant is carried out, the shortcomings of the system safety are put forward, the suggestions for improvement are given, and the improved system is analyzed and discussed. The existing Markov model is improved on the modeling method, and a new model is established for the safety instrument system with some redundant structures containing diagnosis modules, which takes into account the influence of the failure rate of the diagnosis module, and the results are analyzed and discussed. The Markov modeling of non-uniform system is analyzed, and its practicability is proved by calculation.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TQ086
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