可燃性粉尘环境用高压细水雾自动灭火系统

High-pressure water mist automatic fire extinguishing system for flammable dust environment

针对干粉灭火剂会造成污染、清洗困难、可能造成设备损坏等问题,设计了一种可燃性粉尘环境用高压细水雾自动灭火系统。火焰传感器检测到可燃性粉尘燃烧火焰信号后,高压蓄能系统第一时间产生高压水并迅速形成高压细水雾,然后供水系统快速增压到工作压力,接替高压蓄能系统继续提供高压水并持续生成高压细水雾。测试结果表明,可燃性粉尘环境用高压细水雾自动灭火系统响应速度快,火焰传感器和控制器的平均响应时间分别为4ms和12ms;高压细水雾生成速度快,平均生成时间为96ms,最长生成时间为100ms;灭火及时有效,在高压细水雾作用于燃烧火焰1s后,燃烧火焰基本被扑灭,燃烧火焰传播至距中心点火位置0.2m左右停止了传播扩散,验证了该系统能够有效避免可燃性粉尘燃烧火焰的蔓延,防止可燃性粉尘火灾事故。

In view of problems that dry powder fire extinguishing agent will cause pollution,difficult cleaning and equipment damage,a high-pressure water mist automatic fire extinguishing system for flammable dust environment was designed.High-pressure energy storage system generates high-pressure water immediately and rapidly forms high-pressure water mist after flame sensor detects flame signal of flammable dust combustion,and then water supply system is quickly pressurized to working pressure,replaces high-pressure energy storage system to provide high-pressure water and continue to generate high-pressure water mist.The test results show that the high-pressure water mist automatic fire extinguishing system for flammable dust environment has fast response speed,average response time of flame sensor and controller is 4 ms and 12 ms respectively;high-pressure water mist generation is fast and average generation time is 96 ms,the longest generation time is 100 ms;the fire extinguishing is effective and timely,after the high-pressure water mist acts on combustion flame for 1 s,the combustion flame is basically extinguished,and the propagation and diffusion of combustion flame stops when propagates to about 0.2 m from the center ignition position.It is verified that the system can effectively avoid spread of flammable dust combustion flame and prevent flammable dust fire accidents.