Numerical Simulation Study on Oil and Gas Leakage and Diffusion under the Floating Roof Safety Landing Protection System in Large External Floating Roof Storage Tanks

Abstract

Dangerous explosion accidents caused by oil and gas leakage accidents in storage tanks occur frequently. Research on the diffusion laws of oil and gas leakage in large external floating roof tanks is of guiding significance for the production safety of oil and gas leakage monitoring system in the oil storage tank area. Research on oil and gas leakage in oil storage tanks at home and abroad is mostly about oil and gas leakage diffusion laws in two cases: failure leakage of storage tank floating disk seal ring and leakage of tank top aperture. For large external floating roof oil storage tanks proposed by literature [1] There is no relevant research on the oil and gas leakage and diffusion laws of floating roof bottom protection systems in dangerous working conditions. Therefore, using this as the research object, FLUENT software simulation method is used to simulate oil and gas leakage accidents at its maximum oil collection speed. experiment. As a result, the oil and gas concentration distribution in the tank is affected by the flow field and is concentrated on the left side of the tank, and the concentration near the leakage port B is much higher than A. During the 450s of the leakage accident, the oil and gas concentration in the tank had reached 50% of the lower explosion limit. The research results have practical significance and theoretical value for the prevention and control of fire explosion risks of external floating roof tanks equipped with this safety protection bottoming system.