PDF
Full
Outline
In order to evaluate the consequences of H2S-containing associated gas leakage on the platform，ANSYS Fluent software was used to simulate the spatiotemporal changes of the gas diffusion. According to the development process of H2S-containing gas diffusion，the toxic area of the associated gas cloud in two scenarios，namely no protective measures and emergency protective measures，were compared. A quantitative evaluation of the degree of toxic risk of H2S-containing associated gas leakage was conducted by using the dose-response model. The results showed that compared to the scenario with no protective measures，after taking the “shutdown” measure，the volume and horizontal diffusion distance of the gas cloud with H2S concentration ranging from 500-2 000 mg/m3 are reduced by 20%-37.5% and 15.4%-47.6%，respectively. After that，the toxic gas cloud volume and horizontal diffusion distance can be further reduced rapidly by taking the "blowdown" measures. By considering the H2S accumulative concentration and exposure reaction，“shutdown + blowdown” measures can obviously reduce the fatality probability. The fatality of three monitoring spots near the leakage hole decreases from 0.998，0.034 and 0.000 239 to 0.759，0.002 9 and 0.000 000 65 respectively. The area of intolerable section and ALARP section of horizontal plane on the middle deck decrease by 63.7% and 81.7% after taking the emergency protective measures. The hazardous degree of toxic consequences caused by associated gas leakage can be significantly reduced.
PDF
369
160
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
