doi:10.16186/j.cnki.1673-9787.2020.2.2

Received:2019/07/28

Revised:2019/09/24

Published:2020/03/15

Study on the damage range of liquid ammonia storage tank leakage diffusion

WU Jie1, LYU Pin1, YUAN Xiongjun2, PAN Xiaofei1

1.School of Energy and Security， Anhui University of Science and Technology， Huainan 232000 ，Anhui， China；2.School of Environmental and Safety Engineering， Changzhou University， Changzhou  213164 Jiangsu， China

Abstract:In order to study the problem of the leakage range of liquid ammonia storage tank leakage， taking the liquid ammonia storage tank of a power plant as an example， the influences of leakage pore size， leakage location ，wind speed ， temperature ， surface roughness ， and diurnal variation on the leakage diffusion of liquid ammonia storage tank were analyzed by ALOHA numerical simulation technology. And the initial conditions and atmospheric conditions and the relationship between their comprehensive effects on the leakage spread of liquid ammonia storage tanks were fitted. The results showd that as the leakage aperture increased， the ambient temperature increased and the warning range would increase. As the leakage position elevated， the wind speed increase ，the surface roughness increase， and the warning range would decrease； The atmospheric stability at night was higher than that in the day， and could cause great harm. The initial conditions and the external environment and their combined effects on the liquid ammonia tank leakage diffusion hazard range were fitted and the numerical simulation results were 0. 96，0. 99 and 0. 99 ， respectively. The fitting formula could accurately reflect the various factors and the relationship between the leakage spread damage distance. Then， according to the analysis， the most favorable diffusion conditions were determined， and the hazard range was fitted on the spot with satellite cloud images， so as to provide reasonable countermeasures for daily supervision and emergency rescue. This study provided scientific and technological means for effective prevention and emergency disposal of liquid ammonia tank leakage accidents.

Key words:liquid ammonia;leakage diffusion;influencing factor;ALOHA;damage range

液氨储罐泄漏扩散危害范围研究_吴洁.pdf