Using process stream index (PSI) to assess inherent safety level during preliminary design stage
Using process stream index (PSI) to assess inherent safety level during preliminary design stage
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DOI：
10.1016/j.ssci.2011.11.015
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发表时间：
2012-04
期刊：
影响因子：
6.1
通讯作者：
A. Shariff;C. T. Leong;D. Zaini
中科院分区：
文献类型：
--
作者：
A. Shariff;C. T. Leong;D. Zaini
在目前的做法中，安全评估是在工艺设计完成后进行的。在设计的这个阶段，改变概念设计的自由是非常有限的，无论实施什么策略都只会控制危险。本文从爆炸事故的角度，介绍了用于初步设计阶段固有安全水平评估的固有安全指标--过程流指标(PSI)的发展。PSI的目的是在影响爆炸的模拟工作期间计算、比较和优先处理工艺流的固有安全级别。通过根据爆炸的可能性对流进行优先排序，设计工程师可以很容易地确定要考虑改进的关键流，以避免或最大限度地减少爆炸危险。介绍了一种反映混合物中各组分贡献的增强技术，该技术对工艺流固有安全等级的排序具有重要贡献。通过对丙烯酸厂和天然气液化厂的HYsys模拟实例，验证了PSI对固有安全水平的评估。
In the current practice, safety assessment is conducted once the process design has been completed. At this stage of design, the freedom to change the conceptual design is very limited and whatever strategies to be implemented will only control the hazard. This paper reports on the development of inherent safety index known as a process stream index (PSI) for inherent safety level assessment at preliminary design stage from the perspective of an explosion. The aim for PSI is to calculate, compare and prioritize the level of inherent safety of process streams during simulation work that influences the explosion. By prioritizing the streams based on the potential for the explosion, the design engineers can easily identify the critical streams to be considered for improvement in order to avoid or minimize explosion hazards. An enhancement technique to reflect the contribution of the individual components in the mixture is introduced, which provide significant contribution to the ranking of inherent safety level of process streams. The assessment of inherent safety level using PSI is demonstrated by case studies of HYSYS simulation for Acrylic Acid Plant and Natural Gas Liquid (NGL) plant.