Study on safety boundary of liquid carbon dioxide leakage and diffusion
A vertical carbon dioxide storage tank leakage model was established using the phast software,and the effects of different factors such as leakage aperture,leakage pressure,leakage height,ambient wind speed and ground roughness on the safety boundary of liquid carbon dioxide leakage and diffusion were studied.The results showed that small aperture leakage mainly affected the diffusion height of carbon dioxide and the width of the downwind direction on both sides of the cloud cluster.When the leakage aperture increased from the middle aperture to the large aperture,the length of the downwind safety boundary and the width of the downwind safety boundary on both sides significantly decreased.Technical personnel should pay attention to the safety boundary of carbon dioxide clouds when pressure decreased during the pressure relief and repair,which changed from a small impact range and high diffusion height to a large impact range and low diffusion height.There was a low concentration void space in the high-altitude leakage of storage tank,and technicians could make full use of this space to climb up to the leakage point in addition to wearing respiratory equipment during emergency repair.Also,they should focus on weather forecasts,consider the impact of ambient wind speed changes on safety boundary,and promptly change the position of warning lines.Technicians should plant some low crops around the location where the storage tank leakage was prone to occur,which could effectively suppress the diffusion of carbon dioxide to the surrounding area.
carbon dioxidestorage tankmodelleakage and diffusionsafety boundary
NETL
NSTL
万方数据
维普
