Study on the H2S diffusion law of high sulfur gas pipeline leakage
High sulfur gas pipelines pose a significant threat of leakage accidents,which can endanger individuals residing in surrounding structures.This study examined the dispersion of horizontal leakage in natural gas pipelines containing 5％hydrogen sulfide(H2S)through numerical simulations using a computational fluid dynamics approach.The study examined the impact of wind speed on the volume ratio of H2S on each story of a building upstream of a leakage.Key results showed that(1)a significant reduction in the time taken for H2S gas mass to diffuse into a room occurs with an increase in story height,as observed through monitoring points installed at each story in the simulated house model.(2)The diffusion time of H2S air masses in upper floor rooms(from the 11th to the 24th floors)decreased with increasing wind speed.Conversely,the H2S gas cluster diffusion time in lower floor rooms(from the 1st to the 10th floors)was prolonged with greater wind speeds when the wind speed was lower than 9 m/s;however,the diffusion time became shorter as the wind speed exceeded 9 m/s.These results provide an important reference for emergency response and safety management of high sulfur gas pipeline leakage accidents.
natural gas pipelinenumerical simulationleakage diffusionhydrogen sulfide
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