Research On Risk Identification And Assessment Of Petrochemical Tank Area Disaster By Lighting

With the rapid development of China's chemical industry,large petrochemical tanks are increasing and tanks are becoming more and more complex.As a result,the number of major hazards are increasing sharply in petrochemical tanks area.Due to the large number of hazardous chemicals with flammable explosive properties are stored in petrochemical tank areas.If there are explosion or leak and other accidents of major hazard in the tank area,and the accidents affected nearby equipment.Further the accidents cause the domino effect.The accidents caused more severe damage to persons,equipment and buildings around the storage tanks.Because the tanks are usually built in the open suburbs.Tanks are vulnerable to be struck by lightning.The accidents caused damage to adjacent equipment caused by lightning in storage tanks.Further the accidents cause the domino effect.The consequences of accidents will be incalculable.Therefore,it is urgent to identify and evaluate the risk of lightning disaster in petrochemical tank areas.The main contents of this article are as follows.(1)China's hazardous chemicals accidents were counted and analyzedfrom 2015 to 2018.These data were specifically analyzed from the time,region,type of accidents and the occurrence of accidents.There are 1,130 accidents in China,and the number of deaths and injuries caused by the accidents are respectively 1,279 and 2,257.(2)This article identifys major hazard sources based on knowledge of major hazard identification in petrochemical tank areas.Further calculate and determine the risk level of major hazards.Using Factor Analysis Method to analyze the impact factors of accident risk in the petrochemical tank area caused by lightning.The weight of the risk factors for lightning disasters are assigned in the petrochemical tank area.Finally,the risk of lightning disaster was determined.(3)Using the Bayesian network to analyze and evaluate the domino effect.The domino effect is caused by a lightning strike on the tank.The GeNIe software is used to analyze the scene of the domino accident and calculate the probability of the accident.(4)Taking a petrochemical tank area as an example.Firstly,the major hazard identification model was used to confirm that the petrochemical tank area and its storage tanks are major hazards.The risk level of major hazard source is one level in the petrochemical tank area.And the petrochemical tank area is a major danger zone.Then the factor analysis method is used to calculate the risk of lightning disaster in the petrochemical tank area.The risk of lightning disaster is low level in petrochemical tank area.The Bayesian network method is used to quantitatively analyze the domino accident caused by lightning disaster.The results are compared with the results of the traditional Domino accident assessment method.The results show that the former personal risk is greater under the same risk level and more deaths caused by accidents.The personal and social risk results calculated using the Bayesian network method are compared with the risk acceptance criteria.The results show that the individual risk is less than the individual risk acceptance criteria at each level.The social risk curve is in the acceptance zone and as low as possible,this shows that both personal and social risks are acceptable.Finally,measures are proposed to prevent and reduce the risk of lightning and accidents in the petrochemical tank area.The location and layout of the petrochemical tank area provides theoretical support.