Risk Factors Identification And Safety Assessment Of Liquid Ammonia System Of Xinjing Watch Company

Liquid ammonia is widely used in chemical fertilizers,pharmaceuticals,pesticides,refrigeration,metallurgy,semiconductors and military fields.Because of its special physical and chemical properties,liquid ammonia is toxic during the leakage process,and the danger of fire and explosion has gained widespread social attention.Strengthen the liquid ammonia system of the enterprise safety management to prevent the occurrence of liquid ammonia tank leaks and fire and explosion accidents to ensure the safety of people’s lives and property,combined with government requirements to fully guarantee the status quo of enterprise safety,it is necessary to carry out liquid ammonia system Risk factor analysis and safety assessment.Strengthening the liquid ammonia system leakage and fire prevention research is an important factor in the survival and social stability of enterprises,of great significance.In this paper,the use of safety theory as a guide to the new King Table liquid ammonia system as the research object,the use of accident tree analysis method and safety checklist method,analysis of Shandong Xin Jing table liquid ammonia system,the risk factors,and safety evaluation,analysis Such as tank corrosion,hoses,flanges,valves and other damage caused by ammonia leakage risk factors.Through qualitative and quantitative analysis of the various hazards of liquid ammonia leakage,the proportion of each factor was obtained,and effective measures to prevent the occurrence of liquid ammonia leakage were explored to make the enterprise more scientific and effective in liquid ammonia emergency treatment and safety management business.Aiming at the event that the leakage of liquid ammonia storage tank in Shandong Xinjing Watch Co.,Ltd.may cause fire and explosion,an accident tree model is established to analyze the data and divide the different importance of each factor that causes fire;the safety checklist is designed and risk Evaluation,and selected four first-level indicators: liquid ammonia tank defects;the use of pressure pipes and defects;the appearance of the pressure vessel(except the liquid ammonia storage tank,oil collector,condenser,ammonia separator)Anddefects;compressor,low pressure circulation barrel,valve leakage point.Safety checklist analysis shows that the main risk factors of liquid ammonia system are as follows: There are 3 potential hidden dangers in production operation qualification,production license of inorganic unit,no G-C2 pipeline installation qualification and no pipeline layout drawings.More serious hidden dangers such as uneven pressure pipe welds;connected to the low pressure circulation barrel pipe freezing;liquid valve,throttle rust;pressure corrosion of the pipeline outside the room;connected to the vertical condenser pressure pipe diameter and so on.Liquid ammonia system hidden dangers are mainly distributed in the pressure pipe,compressor and valve in these two parts.Proposed enterprises in the future pressure piping and container inspection work,the two key focus of the inspection site.According to the result of risk factor identification and safety assessment,the corresponding safety management and emergency measures are put forward.