Research Of Simulation And Risk Assessment Technology For Leakage Accidents Of Hazardous Chemicals Transportation In Inland River

In terms of transportation of hazardous chemicals,water transportation occupies a large proportion,especially inland water transportation.There are many types of physical and chemical properties of hazardous chemicals,and their environmental behaviors are also different.Analyzing and predicting the environmental behavior of hazardous chemicals after leakage during inland river transportation and their impact on the surrounding environment or humans has important technical support significance for the construction of an emergency treatment technology system.This paper builds a database of physical and chemical properties and environmental behaviors of hazardous chemicals based on the leakage and diffusion behavior of inland water transportation from the perspective of optimized emergency and efficient response of hazardous chemicals.Based on the coupling analysis of the physical and chemical characteristics of hazardous chemicals,environmental hazards and the characteristics of waterway traffic environmental pollution accidents,a combination of physical test simulation and mathematical model prediction was used to design and develop a waterway transportation leakage environment simulation test platform.This test platform was used to study the migration and transformation process of hazardous chemicals after the leakage,forming a technical method for the simulation analysis of the hazardous chemical leakage process and accident consequence assessment,and provides technical support and guarantee for the leakage pollution accident and risk assessment of hazardous chemicals in inland water transportation.The innovative results of this research are as follows:(1)For the first time,a database of physical and chemical characteristics and environmental behavior based on the leakage and diffusion behavior of hazardous chemicals in inland water transportation was independently developed and constructed.From the perspective of classified emergency response,rapid response and efficient disposal,the intrinsic and gas-liquid two-phase coupled diffusion of hazardous chemicals was realized.It can achieve the purpose of real-time fast query and call of series of data on the physical and chemical properties of hazardous chemicals and environmental analysis.The database divides hazardous chemicals into three categories: impact on human health,impact on the aquatic environment,and impact on inland water activities.There are 5 categories,each of which is specifically subdivided into 13 categories,which are my country’s hazardous chemicals.This database provides basic guidance and reference for the classification and use of hazardous chemicals in my country,and fills up the gaps in domestic related fields.(2)Designed and developed a set of environmental simulation test platforms suitable for waterway transportation of hazardous chemicals and pollution accidents,and established a quantitative assessment model for the concentration of hazardous chemicals in inland waterway transportation,which can quantitatively obtain the maximum concentration of hazardous chemicals in the atmosphere.This model can provide technical support for the scientific assessment of the damage caused by hazardous chemicals and the efficient implementation of emergency rescue.(3)Taking the actual inland river environment as the background,the leakage and diffusion process of insoluble hazardous chemicals in inland rivers was numerically calculated,and the dynamic evolution process and microscopic of the release,diffusion,drift,deformation and fusion of hazardous chemical micro-clusters was systematically analyzed.Obtained the influence mechanism of the density,viscosity of hazardous chemicals,and water flow rate on the evolution process of hazardous chemicals micelles.The effect of different influencing factors on the environmental behavior of hazardous chemicals was acheved.At the same time,a series of application researches including data collection of hazardous chemicals,health risk assessment,environmental risk assessment and removal capability assessment were carried out,and those pivotal factors such as inland river hazardous chemicals risk assessment procedures,assessment content,data traceability and extraction,risk characterization and risk rating standards were determined.