| According to national energy and environment protection policy, in the past years, the number of CNG vehicle and CNG filling station had been gradually increasing in China. However, owing to draggling of CNG filling station safety management technique, CNG filling station safety problems emerge increasingly. In order to make sure that natural gas vehicle industry develops healthily and continually in China, it will have very important meaning studying on theories and actuality of CNG filling station safety problems.Proceed from the reality of CNG production and course, gray interrelated theory and faulty tree — the principles are adopted in this paper. To make the theoretical research and practical application combine together, the system of safety evaluation index, appraise model and the correspondent appraise software are done in this paper. Taking certain filling station of Sichuan Province as an example, and then author validates the theories. The study result will have the positive function to our country safety evaluation work.CNG filling station product system is a complex system composed with man -machine- environment, author follows the general step of system evaluation and the general principle of establishing index evaluation system, setting up CNG filling station safety evaluation index system and expatiating the meaning and standard of all evaluation indexes.The paper discusses and analyzes the establishing process of CNG filling station safety evaluation model, and it is explained in detail that the method-improved hierarchy analysis process is used in ascertaining the index important degree .At the same time, in order to validate the accuracy of evaluation index and model, it is evaluated certain CNG station safety status of Sichuan Province, and it is educed that the safe grade of the station is "safer" according withpractice.They are established the faulty tree of CNG filling station main systems (dispenser system, storage system, purify system, compressor system) in the paper. By the FTA, it is confirmed hidden trouble of main systems, and they are analyzed main reasons of hidden trouble. Then Author brings forward improvement measures that will prevent CNG filling station accident.Author takes two and three chapters contents as foundation, developing CNG filling station safety evaluation software with Visual Basic 6.0.The software is "operating conveniently, interface amity", having the function of data management, CNG filling station safety evaluation, data searching and so on. It is coming true that automatization and programming of CNG filling station safety evaluation work. |
