Safety Evaluation In Continuous Production Of Oblate Spherical Propellant

Oblate spherical propellant is a kind of special propellants which can improve the medium and small caliber weapons effectively and be widely applied. This paper is to study the safety of the continuous production process of oblate spherical propellant and uses respectively the BZA-2 analysis,accident tree method,SDG-HAZOP analytical method to analyze the whole technological process, important process of system and subsystem. Evaluation results can improve the security of oblate spherical propellant continuous production.BZA- 2 method can be able to reflect comprehensively the status of evaluated target security and the future direction, so firstly select this method to evaluate the entire production process and use fuzzy mathematics method in the evaluation. Evaluation results show that, the production system risk value is 226.84. According to the hazard risk level and the rectification classification standard, when the assessed value is less than 500, it can be identified as Class I and belongs to the mild degree of danger, in this case it need to supervise the rectification workshop and factory.Accident tree method can analysis and evaluate the target objectives qualitatively and quantitatively, in this paper it be used to evaluate the forming spherical process and drying process in oblate spherical propellant continuous production process. The forming spherical process is the first step on the molding raw material, which involved hazardous materials and dangerous operations, this process can be completed smoothly or not directly affects the subsequent process, therefore, it is as an important evaluation objective to analysis and evaluate. Drying process including many conditions process, if there is an unexpected failure or conditions are not met, it is likely to cause blasting accident, so it is also as an important working procedure to evaluate. The results show that, controlling the production process conditions to avoid reaching the ball flat drug initiation sensitivity is a priority in forming spherical process, ensuring the normal work of the air temperature and humidification system is a top priority in the drying process.The SDG-HAZOP method is a kind of analysis methods which can through the node connection failure analysis and deviation consequences. In the paper, analysis and evaluate the subsystems ethyl tanks by combining AHP and SDG-HAZOP method, find out the adverse consequences arising from the bias node: when the flow control valve status appears positive and negative deviations, it will result in reduced height in pump intrusion,ethyl acetate tank overflow leakage and so on.