煤粉深位火灾灭火剂及其水平蔓延规律

为解决一般灭火剂和灭火方式无法扑灭煤粉深位火 灾的问题，在水中加入表面活性剂，降低表面张力，提高其润湿煤 粉的能力，作为扑灭煤粉内部深位火灾的有效灭火剂。通过设置 实验装置筛选出适用于煤粉深位火灾的灭火剂。通过实验得到灭 火剂的主要配方为 0.20%吐温-80、0.10%乙二胺四乙酸四钠、 0.05%丁二酸二异辛酯磺酸钠和 0.10%碳酸钾溶液，余量为水。 在渗透压力分别为 0.1、0.2、0.3 MPa 情况下，得到灭火剂渗透到 0.25、0.50、0.75 m 处的渗透时间，利用实验结果拟合得到了灭火 剂水平渗透蔓延煤粉的计算公式。

Study on extinguishing agent and its horizontal spreading law in pulverized coal deep-seated fire

In order to solve the problem that common extinguishing agent and extinguishing method can’t extinguish pulverized coal fire at depth level,an effective fire extinguishing agent was obtained by adding surfactant into water to reduce the surface tension and improve the wettability of coal powder.The extinguishing agent for pulverized coal fire at depth level was screen out by setting experimental device.The main formulations of fire extinguishing agent are 0.20%twain-80,0.10%ediaminetetraacetic acid tetrasodium,0.05%diisooctyl succinate sodium sulfonate and0.10%potassium carbonate solution.The penetration time of extinguishing agent to 0.25,0.50 and 0.75 m is obtained at the penetration pressure of 0.1,0.2 and 0.3 MPa respectively.Based on the experimental results,the formula for calculating the horizontal penetration and spreading of pulverized coal for fire extinguishing agent is obtained.