凝胶泡沫对原煤自燃的阻化特性实验研究  

Experimental Research on Inhibition Characteristic of Foamed Gel on Raw Coal Spontaneous Combustion

作　　者：陆新晓 赵鸿儒[2] 薛雪 韩宇 LU Xinxiao;ZHAO Hongru;XUE Xue;HAN Yu(State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology (Beijing),Beijing 100083, China;College of Resources and Safety Engineering,Beijing 100083,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo 454150,China)

机构地区：[1]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学(北京)资源与安全工程学院,北京100083 [3]河南理工大学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454150

出　　处：《煤矿安全》2019年第1期33-37,共5页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51704299);煤炭资源与安全开采国家重点实验室开放课题资助项目(SKLCRSM17KFA10);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开放基金资助项目(WS2018A03)

摘　　要：为揭示凝胶泡沫对煤自燃的阻化特性,通过煤自燃标志性气体测定实验系统对比分析不同泡沫阻化剂处理的煤温升速率、标志性气体的产生发展规律,并采用同步热分析仪分析煤在热解过程中特征温度和热效应。结果表明,不同泡沫阻化剂阻化后的煤样,临界温度Trl、缓慢氧化温度Tml及燃尽温度Tme相比原煤呈现"滞后效应";凝胶泡沫处理煤样起始放热温度由29.77℃提高到89.61℃,最大释热功率由50.15 mW/mg降到37.11 mW/mg;水基、泥浆、凝胶泡沫处理煤样阻化率分别为2.54%、5.28%、10.1%,凝胶泡沫阻化处理煤样的温升速率与CO、C2H4析出速率始终小于泥浆和水基阻化处理的煤样,凝胶泡沫阻化性能相较水基和泥浆效果更好。To reveal the inhibition characteristic of foamed gel used for coal spontaneous combustion, the test system for coal spontaneous combustion index gases was established to compare and analyze the heating rate and the development law of index gases of coal treated by different foam inhibitors, and the synchronous thermal analyzer was used to analyze the characteristic temperature and pyrolysis characteristic of coal. The results show that the critical temperature Trl, the slow oxidation temperature Tmland the burnout temperature Tmeof coal treated by different foam inhibitors are higher than that of raw coal. For the coal sample treated by foamed gel, the initial exothermic temperature increased from 29.77 ° C to 89.61 ° C, and the maximum heat release power reduced from 50.15 mW/mg to 37.11 mW/mg. The inhibition rate of coal samples treated by water, foamed mud and foamed gel were 2.54%, 5.28%, and 10.1% respectively. The heating rate and velocity of producing CO and C2H4 of the coal sample treated by foamed gel are always slower than that of foamed mud and water. So the inhibition characteristic of foamed gel is better than that of water and foamed mud.

关 键 词：凝胶泡沫 阻化率 标志气体 特征温度 煤自燃 

分 类 号：TD752.2[矿业工程—矿井通风与安全]