Natural gas filling station safety evaluation model and evaluation method

Abstract

The invention relates to the technical field of LNG (liquefied natural gas) filling station safety evaluation, in particular to a natural gas filling station safety evaluation model and method, and the evaluation model comprises the following steps: S1, building an index system based on a fault tree, S2, determining an index weight based on an analytic hierarchy process, and S3, carrying out safety evaluation on the station based on grey weighting clustering. The evaluation method comprises the following steps: 1, sorting risk indexes influencing the safety of the LNG filling station through design files, field investigation, daily work experience and the like, classifying the risk indexes, and merging the risk indexes into different levels according to classification results; according to the method, the index system is established based on the fault tree, the analytic hierarchy process and the grey clustering method are comprehensively used for calculating the weights and the importance degrees of the influence indexes of the LNG gas station system, the conclusion of safety evaluation of the LNG gas station is more scientific, more accurate and more comprehensive, and the technology is high in practicability.

Description

technical field [0001] The invention relates to the technical field of safety evaluation of LNG filling stations, in particular to a safety evaluation model and evaluation method of natural gas filling stations. Background technique [0002] Compared with CNG filling stations, the development of LNG filling stations is relatively late. Since 2010, LNG vehicles have been gradually developed on a large scale across the country. Therefore, there are relatively few studies on the safety management of LNG filling stations, and the research period is also relatively small. not long. Since natural gas is flammable and explosive, and LNG filling stations serve the society, the safety evaluation of LNG filling stations is essential. [0003] At present, the safety evaluation of LNG filling stations mainly adopts one or two of the main methods such as Dow Chemical’s fire index method, safety checklist method, and fault tree analysis method, and they are all completed by the evaluator...

AI Technical Summary

Problems solved by technology

However, due to the relatively large number of safety indicators for LNG filling stations and the relatively many levels of indicators, and there are still many uncertain factors in safety management, subjective factors account for a large proportion. From the current practice results, one or two There are still some weak points in this combined evaluation method, such as incomplete evaluation of safety indicators, greater influence of subjective factors of evaluators, unknown weight of risk factors, comprehensive evaluation results cannot be reflected, etc., resulting in the safety management of LNG filling stations. Cannot provide objective, comprehensive and complete reference

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