Risk Evaluation And Control Measures Of Tianjin LNG Terminal

With the rapid development of LNG(liquefied natural gas)project,adjusting and optimizing of the country’s energy structure,natural gas as a clean energy for its no pollution,high energy efficiency has received widespread attention.LNG has become an important energy of diversifying China’s energy supply,it is also the optimization of China energy structure,improve the environment,improve the energy efficiency of effective measures.LNG is a kind of cryogenic liquid with the chief component(90%)of methane,ethane,nitrogen gas(0.5 1%)and a small amount of C3 ~ C5.LNG is another form of natural gas.natural gas belongs to class B fire dangerous substances,the explosion limit range of 5.3% ~ 15%(V/V),and spontaneous combustion temperature is about 590 ℃,lighter than air,easy to spread.Gas equipment and pipeline corrosion,pipeline welding is unqualified,or man-made destruction may cause natural gas leakage,leakage of high concentration of natural gas may cause suffocation,if encounter flame,it may cause fire explosion which harm to people and companies around.Because of the special storage conditions,there are all kinds of risks in its production,storage,transportation and use process of LNG terminal,using comprehensive evaluation method to risk analysis,take good measures to ensure receiving station safe and smooth operation is necessary.Fire resistance of the material of terminal is at a high inherent risk degree;Taking Tianjin LNG terminal as an example,by establishing evaluation model,using the engineering safety comprehensive safety evaluation,safety check list method,the risk evaluation method,Dow chemical fire and explosion index method,accident consequence model simulation evaluation methods,take the LNG storage tank unit as an example,,Evaluating dangerous and harmful factors which may lead to an accident.Put forward the corresponding control measures,dynamic sealing equipment,strengthen the management easy to leak;DCS collecting and distributing control system is adopted to improve the production operation,realizing remote automatic program control,avoid direct contact with the operator;Unit within the set fire alarm system;In high noise limit the operation time in the work environment,strengthen individual protective measures.All transport and handling of liquefied natural gas pipeline,equipment are good insulation protection measures against the cold.In order to realize the security requirement of the process equipment layout.To ensure safety in production,in the process of engineering construction should carry out the various safety management measures,and put into operation during commissioning and implementation after the production of special equipment management,equipment regular inspection inspection,safety accessories and alarm interlocking device maintenance,personnel training,the establishment of operating procedures,emergency and the practice of the plan and improve the safety management measures.With various measures,the risks of the project can be controlled.