高压细水雾系统在地铁项目中的应用

High-pressure Water Mist System Applied in Subway

介绍地铁消防系统现有的应用技术,讨论细水雾灭火系统的分类、组成及特点。阐述高压细水雾灭火系统在地铁建设及运营上的应用———该系统通过极短时间内降低火场氧气浓度而使火焰缺氧熄灭,并且保证人体生命供氧的最低需求,在降低火场温度和烟气密度的同时,有效提高火场人员的生存几率。对细水雾系统与气体灭火系统进行经济比较,并分析其应用中存在的问题。实践表明,细水雾系统对于保证人员生命安全及降低物质损失具有重要的现实意义,特别适合应用于地铁这类地下大空间及对于人员疏散及时性要求较高的场所。

The paper introduces the applied techniques of subway fire-fighting system and discusses the classification,composition and characteristics of water mist suppression system.Application of the high-pressure water mist suppression system in subway construction and operation is elaborated.The system reduces the scene oxygen density in extremely short time to cause oxygen deficit extinguishment of the flame,but simultaneously guarantees the lowest oxygen demand for human life,reduces the scene temperature and smoke density,and raises the scene personnel＇s survival probability effectively.Comparison was carried out on the economy between the thin mist system and the gas suppression system,analyzing the problems existing in their application.Practice indicated that the thin mist system can safeguard personnel safety and reduce material loss;it is especially adaptable to subway and big underground space where personnel emergency evacuation is crucial.