不同驱动压力下灭火剂对云南松木垛的灭火效能研究  

Extinguishing efficiency of fire agent on Yunnan pine crib under different driving pressure

作　　者：黄淙葆 代张音[1] 陈有成 蒙文富 Huang Congbao;Dai Zhangyin;Chen Youcheng;Meng Wenfu(Mining College,Guizhou University,Guizhou Guiyang 550025,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025

出　　处：《消防科学与技术》2023年第11期1549-1554,共6页Fire Science and Technology

基　　金：贵州省科技计划项目(黔科合支撑[2022]一般250)。

摘　　要：为进一步提升我国森林防灭火技术水平,降低森林火灾造成的损失与危害,本文针对西南林火不同驱动压力下灭火剂的灭火效能,选取西南地区常见易燃树种云南松作为燃烧材料,搭建木垛灭火试验平台,通过模拟西南林区木材燃烧状态,开展3种驱动压力(0.45、0.55、0.65 MPa)条件对水凝胶灭火剂与A类泡沫灭火剂的灭火效能影响试验研究,基于灭火时间、耗量、降温速率、降低热辐射通量效果等参数进行对比分析。结果表明:驱动压力逐渐增大时,木垛灭火时间逐渐缩短,流速增加,灭火剂耗量逐渐减少;当驱动压力从0.45 MPa分别增加至0.55 MPa和0.65 MPa时,A类泡沫灭火剂的降温速率增幅约6%和54%,水凝胶灭火剂降温速率增幅约54%和90%;随着驱动压力增加,灭火剂降低热辐射通量速率增大;相同驱动压力下,A类泡沫灭火剂对燃烧木垛冷却深度不足,0.45 MPa驱动压力下无法有效抑制木垛火焰,水凝胶灭火剂可快速扑灭明火,有效抑制阴燃木垛复燃。In order to further improve the technology level of for-est fire prevention and reduce the loss and damage caused by for-est fires,Yunnan pine,a common flammable species in south-west China,was selected as the burning material to build a fire ex-tinguishing agent spraying wood stack fire test platform.The ex-perimental study on the influence of three driving pressures(0.45、0.55、0.65 MPa)on the fire extinguishing efficiency of hydrogel extinguishing agent and Class A foam extinguishing agent was car-ried out,and comparative analysis was made based on the param-eters of fire extinguishing time,consumption,cooling rate and ef-fect of reducing heat radiation flux.The results show that when the driving pressure increases gradually,the fire extinguishing time decreases gradually,the flow rate increases,and the extin-guishing agent consumption decreases gradually.When the driv-ing pressure increases from 0.45 MPa to 0.55 MPa and 0.65 MPa respectively,the cooling rate of Class A foam agent increases by about 6%and 54%,and that of hydrogel agent increases by about 54%and 90%.With the increase of driving pressure,the decreasing heat radiation flux rate of extinguishing agent in-creases.Under the same driving pressure,the cooling depth of class A foam extinguishing agent is insufficient for burning wood battlements,and the fire of wood battlements cannot be effec-tively suppressed under the driving pressure of 0.45 MPa,while the hydrogel extinguishing agent can quickly extinguish open fire and effectively inhibit the reignition of smoldering wood.

关 键 词：灭火剂 森林火灾 云南松木垛 驱动压力 灭火效能 热辐射通量 

分 类 号：X932[环境科学与工程—安全科学] S762[农业科学—森林保护学]