一种新型泡沫凝胶成胶时间及灭火特性的实验研究  

Research on gelling and fire extinguishing characteristic of a new-style foamed gel

作　　者：于水军[1,2] 赵红[1] 孟国栋[3] 陈晓利[1] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南省瓦斯地质与瓦斯治理重点实验室,省部共建国家重点实验室培育基地,河南焦作454003 [3]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《火灾科学》2013年第4期219-225,共7页Fire Safety Science

基　　金：教育部长江学者和创新团队发展计划项目(IRT0618);国家安监总局煤矿安全生产科技发展计划项目(08-149);河南省基础与前沿技术研究计划项目(082300463205;09230041004);河南省教育厅自然科学基金项目(2007620004)

摘　　要：为研究新型无氨泡沫凝胶的胶凝特性和灭火特点,采用倾斜试管法分别测试了不同反应物浓度、温度、pH值和发泡剂浓度等参数对新型泡沫凝胶成胶时间的影响,同时通过灭火实验对泡沫凝胶的消防特性进行了研究。结果显示:当水玻璃与促凝剂的质量比在1.33-4.0时材料成胶时间满足煤矿灭火要求;pH值在6.9-8.5时成胶最快;成胶时间随温度升高而减小;发泡剂浓度对成胶时间影响不大;泡沫凝胶灭火效果良好且有效延长了复燃周期。因此泡沫凝胶在矿井消防中有很强的实用价值,并且可通过限制反应物浓度、pH值、温度等参数,更高效的控制成胶时间。In this work, a series of experiments have been conducted to study the gelling and fire extinguishing characteristic of a new-type foamed gel. The influence of concentrations of reactants and foaming agents, temperature and pH on gelation time was investigated by using test tube tilting method. The fire extinguishing characteristic was examined by experiments. Results obtained show that the gelation time meets the requirements of coal fire-fighting when the mass ratio of sodium silicate and ammonia gelling agent is between 1.33 and 4.0. The foamed gel gelatinizes fastest for pH between 6.9 and 8. 5. The gelation time decreases with increasing temperature, while the concentration of foaming agent has little influence on gelation time. The foamed gel has good fire-fighting effect. In practical application, the gelation time can be controlled by factors such as concentration of reactants, pH, and temperature.

关 键 词：矿井火灾 泡沫凝胶 胶凝特性 成胶时间 

分 类 号：TD75[矿业工程—矿井通风与安全] X915.5[环境科学与工程—安全科学]