Risk Analysis of Ammonia Refrigeration System Equipment and Process Based on HAZOP-LOPA
In order to effectively prevent the accident of the ammonia refrigeration system and improve the safety management level of ammonia refrigeration enterprises,in this paper,the technological parameters of the main technological equipment and facilities of the cold storage enterprise were comprehensively analyzed based on HAZOP(hazard and operability analy-sis)and LOPA(layer of protection analysis)taking the technological equipment of the ammonia refrigeration system of an cold storage enterprise.HAZOP was used to carry out the risk analysis and screen technological parameter deviations of 4 kinds of high-risk levels and 7 kinds of higher risk levels.Based on the screening results,LOPA was used to analyze the fre-quency of occurrence of initial events and conditional events and the frequency level of the independent protection layer of the technological equipment,and obtain the frequency of occurrence of consequences after retarding.The results show that the application of HAZOP and LOPA can better realize the risk level quantification under accident scenarios,and proposed safety measures aiming at the 4 kinds of technological deviations belonging to unacceptable risks can provide guidance and reference for the risk management and control of the equipment and technology of ammonia refrigeration systems.
hazard and operability analysis(HAZOP)layers of protection analysis(LOPA)ammonia refrigeration systemrisk analysis
NETL
NSTL
万方数据
