关键词: 液化烃, 装车设施, 泄漏风险, 紧急切断, 应急处置

Abstract: Since liquefied hydrocarbons will vaporize at normal temperature and pressure; or a large amount of gas evaporates; the ignition energy is small and the risk of fire and explosion during transportation and loading is high. Therefore, it is stipulated in the relevant national standards that an emergency shut-off valve which is easy to operate should be installed on the loading pipe 10 m away from the loading and unloading crane pipe, so that when liquefied hydrocarbon leakage occurs, the material source can be cut off immediately, and the risk of leakage can be controlled to prevent the accident from expanding. Due to the unclear definition of the emergency shut-off valve by national standards, there are some deviations in engineering practice. In fact, this regulation itself has defects in the control of leakage risk, and it is not coordinated with the emergency disposal of loading leakage, which is likely to cause accidents to expand. On the basis of in-depth investigation of liquefied hydrocarbon loading facilities and based on the current standard regulations, this paper starts from analyzing the leakage risk of liquefied hydrocarbon loading facilities and improves the design ideas of emergency shut-off system for liquefied hydrocarbon loading facilities.

Key words: liquefied hydrocarbon, loading facilities, risk of leakage, emergency shutdown, emergency treatment