| The storage process of hazardous chemicals from production,operation to use involves the storage process of hazardous chemicals in a large number of centralized storage.The storage process of hazardous chemicals has become an accident-prone and accident-prone link because of the obvious differences in the state,performance and storage environment of hazardous chemicals stored in it.The most common storage accidents of hazardous chemicals are fire and explosion accidents,accounting for more than 70% of the total accidents.These two kinds of accidents are not only destructive,dangerous,wide-ranging and difficult to control,but also transform to a certain extent,causing secondary accidents,slightly negligent,which may cause major safety accidents,loss of people’s lives and property,damage and pollution to the environment.In order to prevent and control the risk of hazardous chemicals storage comprehensively and effectively,and to study the risk factors affecting the explosion accidents of hazardous chemicals storage under different time distributions,this paper applies the theories and methods of safety theory,safety statistics,system safety evaluation,coupling degree function,entropy weight method,grey theory and Markov method to study the risk coupling characteristics and accident prevention and control of hazardous chemicals storage.A series of studies have been carried out,such as data statistics,model construction and application,accident risk prediction and countermeasures,and the following conclusions have been drawn.:1.By elaborating the definition,classification,and hazard characteristics of hazardous chemicals,combining with the related concepts of risk,on the basis of accident-causing theory,and on the basis of a large number of actual investigation data of hazardous chemicals storage accidents,the factors of person,machine,environment and management system of hazardous chemicals storage accidents are determined.At the same time,based on 118 hazardous chemicals storage accidents occurred from 2012 to 2018,the categories of hazardous chemicals and accidents are determined.Statistical analysis was carried out on time distribution and accident occurrence.2.Combining with risk coupling related concepts and comparing various risk assessment methods,time is divided into day and month periods on the basis of establishing risk assessment indicators for hazardous chemicals warehousing.A risk assessment model of coupling degree of hazardous chemicals warehousing explosion accidents based on time dimension is constructed,which is substituted for historical data,and the coupling change law of risk factors for hazardous chemicals warehousing in time is obtained to compensate for the time dimension coupling.In order to find out the causes and rules of hazardous chemicals storage risk accidents,the coupling degree of N-K model is added to analyze the overall development trend of hazardous chemicals storage coupling risk.3.Combining the grey GM(1,1)prediction model with Markov method,a combined prediction model is constructed.The accidents in 2019 and 2020 are forecasted by using hazardous chemicals storage accidents in 2012-2018.The number of accidents in the first quarter of 2019 is compared.Finally,the accuracy of the combined prediction model is tested.4.This paper constructs the accident prevention and control system of hazardous chemicals warehousing from two aspects of accident evolution mechanism prevention and control strategy and emergency management strategy,analyses the distribution law of coupling degree,establishes the accident chain of hazardous chemicals warehousing,constructs the framework of identification and early warning system of hazardous chemicals warehousing explosion accident,puts forward the emergency rescue system of hazardous chemicals warehousing,standardizes the emergency rescue response mechanism,and strengthens the emergency drilling countermeasures to become hazardous chemicals.The prevention and control before and after warehousing accidents lay a framework foundation and provide guidance. |
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