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首页> 外文会议>Center for Chemical Process Safety Annual International Conference; 20040629-0701; Orlando,FL(US) >System Improvements Utilizing FMEA and Fault Tree Analysis
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System Improvements Utilizing FMEA and Fault Tree Analysis

机译：利用FMEA和故障树分析进行系统改进

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In December 2002 the Lyondell-Citgo Refinery experienced an incident that resulted in tripping one of the Clous Units. Losing the Claus Unit meant higher than normal levels of SO_2 were released from the thermal oxidizers, and that the nearby community was notified of the potential impact. This paper focuses on system analysis and improvement opportunities to reduce the likelihood of a similar incident. The incident had little offsite impact, but did highlight the need for an alternative approach to assess the capabilities of the Sulfur Recovery Complex at the Lyondell-Citgo Refinery. The refinery managers and staff are committed to reducing the likelihood of these types of events in the future. The cause of the release was traced back to a level control failure on a knockout pot in the Coker Unit. This failure resulted in a significant amount of hydrocarbons being carried to the Amine Regeneration Unit. Hydrocarbon in the Amine Unit, if not separated, can result in system upsets in the Claus Units with potential environmental releases. There are several process units that have similar configurations with the potential to result in the same or similar consequences. Because of the complexity of the scenarios, a team of Lyondell-Citgo employees and consultants were tasked with estimating the frequency of the possible scenarios and proposing mitigation options to reduce the frequency. This paper will discuss the methodology used by the team to identify the possible scenarios that have the potential to result in a similar upset to that experienced in December 2002. It will further discuss the benefits of using risk as a basis for decision making for the management team at Lyondell-Citgo.
机译：2002年12月，Lyondell-Citgo炼油厂发生了一起事故，导致其中一个Clous单元跳闸。失去克劳斯装置意味着热氧化剂会释放出比正常水平更高的SO_2，并且已通知附近的社区潜在的影响。本文着重于系统分析和改进机会，以减少发生类似事件的可能性。该事件对现场的影响很小，但确实突出了需要一种替代方法来评估Lyondell-Citgo炼油厂的硫磺回收厂的能力。炼油厂的管理人员和工作人员致力于减少将来发生此类事件的可能性。释放的原因可追溯到在Coker装置中的分离罐上的液位控制故障。这次失败导致大量的碳氢化合物被输送到胺再生装置。如果不将胺单元中的烃分开，则可能导致克劳斯单元的系统故障，并可能释放环境。有几个具有相似配置的处理单元，有可能导致相同或相似的结果。由于方案的复杂性，一个由Lyondell-Citgo员工和顾问组成的团队的任务是估计可能方案的发生频率，并提出缓解方案以降低发生频率。本文将讨论团队所使用的方法来鉴定具有导致类似心烦的是经历了2002年12月将进一步讨论使用风险作为决策的基础管理的好处的潜在可能出现的情况Lyondell-Citgo的团队。

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