Abstract
Severe gas leakage accidents occasionally happened during the exploitation of high-sulfur gas, the consequent harmful gas dispersion could seriously impact the air quality, cause large-scale casualties and economic losses. Therefore, people’s comprehensive understanding of harmful gas dispersion in both spatial and temporal dimensions should be improved. This paper takes gas well blowout accident in Kai County, China, as the case study, simulates and analyzes the dispersion characteristics of the leaked gas, mainly focuses on H2S. The CALPUFF model is applied to execute the experiment, the detailed meteorological data, complex terrain data, wet deposition and chemical transformations are all under consideration. The result shows that due to different impact factors, such as complex terrain and gas density variations, H2S exposure risk was higher in the valley area than that on the mountain, which also explains why Xiaoyang and Gaowang villages have a great number of casualties. Besides, the analysis result is basically consistent with the historical local news and reported data, which demonstrated that our case study of H2S gas dispersion simulation is reasonable and reliable.
Highlights
With the rapid development of urban industrialization all over the world, the consumption of resources is gradually increasing
A great number of researchers have investigated atmospheric diffusion simulation based on computational fluid dynamics (CFD) method, CALPUFF model, AERMOD model and etc
This paper explored the gas well blowout problem based on CALPUFF model, considering both the meteorological data and complex terrain data, and analyzed the peak value varied with time, which could help people comprehensively understand the H2S gas dispersion regularity
Summary
With the rapid development of urban industrialization all over the world, the consumption of resources is gradually increasing. The air pollution problem and even the emergency response system has drawn great attention both in the industrial and academic areas. A great number of researchers have investigated atmospheric diffusion simulation based on computational fluid dynamics (CFD) method, CALPUFF model, AERMOD model and etc. The current research lacks of comprehensive analysis for spatio-temporal characteristics of gas diffusion procedure, and an efficient way to directly observe and analysis the spatiotemporal procedure of gas leakage and dispersion, and some essential problems still need to be investigated and improved. This paper explored the gas well blowout problem based on CALPUFF model, considering both the meteorological data and complex terrain data, and analyzed the peak value varied with time, which could help people comprehensively understand the H2S gas dispersion regularity
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