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[1]王福生,艾晴雪,赵雪琪.无机磷化合物对煤自燃的阻化作用研究[J].中国安全生产科学技术,2017,13(9):101-108.[doi:10.11731/j.issn.1673-193x.2017.09.016]
　WANG Fusheng,AI Qingxue,ZHAO Xueqi.Study on inhibition effect of inorganic phosphorus compounds on spontaneous combustion of coal[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(9):101-108.[doi:10.11731/j.issn.1673-193x.2017.09.016]
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无机磷化合物对煤自燃的阻化作用研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年9期
页码:
101-108
栏目:
现代职业安全卫生管理与技术
出版日期:
2017-09-30

文章信息/Info

Title:
Study on inhibition effect of inorganic phosphorus compounds on spontaneous combustion of coal
文章编号:
1673-193X(2017)-09-0101-08
作者:
王福生; 艾晴雪; 赵雪琪
（华北理工大学 矿业工程学院，河北 唐山 063210）
Author(s):
WANG Fusheng;  AI Qingxue;  ZHAO Xueqi
(College of Mining Engineering, North China University of Science and Technology, Tangshan Hebei 063210, China)
关键词:
煤自燃; 酸根离子; 无机磷化合物
Keywords:
spontaneous combustion of coal;  acid radical ion;  inorganic phosphorus compounds
分类号:
TD76
DOI:
10.11731/j.issn.1673-193x.2017.09.016
文献标志码:
A
摘要:
为减少及控制煤矿井下自然发火现象,利用实验对比分析在15%,17%,20% 3种不同浓度下的磷酸二氢钠、次亚磷酸钠、磷酸三钠和磷酸铝对荆各庄气煤的阻化作用及效果。通过程序升温-气相色谱联机实验，对比分析原煤样与阻化煤样程序升温过程中CO气体释放规律，发现20%次亚磷酸钠、20%磷酸二氢钠、15%磷酸三钠以及20%磷酸铝阻化效果最好；傅里叶红外光谱实验对比分析原煤样与阻化煤样的分子结构，随着温度的升高分解出的次亚磷酸根和磷酸二氢根可以维持苯环的稳定，磷酸三钠分解的磷酸根与甲基及亚甲基中的H+进行结合，生成具有还原性的酸；利用电子自旋共振实验分析原煤样与阻化煤样的自由基随着温度变化规律，随着温度的升高阻化煤样的自由基浓度低于原煤样，阻化剂的添加改变了煤内部结构，使g因子值呈现出下降的趋势；通过综合热分析仪发现在燃烧阶段加入次亚磷酸钠和磷酸三钠可提高煤分子中较稳定结构裂解所需能量，从而使煤-氧化学反应出现一定的延迟。通过实验筛选出20%次亚磷酸对气煤的阻化效果最好。研究成果对预防或减少矿井自然发火具有重要的指导意义。
Abstract:
To reduce and control the phenomenon of spontaneous combustion in underground coal mine, the inhibition action and effect of sodium dihydrogen phosphate, sodium hypophosphite, trisodium phosphate and aluminum phosphate, with three different concentrations of 15%, 17% and 20%, on the gas coal from Jinggezhuang were compared and analyzed through the experiments. The release rules of CO during the temperature programmed process of raw coal sample and inhibition coal sample were compared and analyzed through the temperature programmed and gas chromatography online experiments, and it showed that the inhibition effect of sodium hypophosphite with 20% concentration, sodium dihydrogen phosphate with 20% concentration, trisodium phosphate with 15% concentration and aluminum phosphate with 20% concentration were the best. The molecular structure of raw coal sample and inhibition coal sample were compared and analyzed through the Fourier transform infrared spectroscopy experiments, and it showed that the decomposed hypophosphite and dihydrogen phosphate with the increase of temperature could maintain the stability of the benzene ring, and the phosphate radical decomposed by trisodium phosphate would combine with H+ of methyl and methylene to produce the reductive acid. The change laws of free radical in raw coal sample and inhibition coal sample with temperature were studied by using the electron-spin-resonance experiments, it showed that the concentration of free radical in inhibition coal sample was higher than that in raw coal sample with the increased of temperature, and adding the inhibitor changed the internal structure of coal, which caused the decreasing trend of g factor value. Adding the sodium hypophosphite and trisodium phosphate in the combustion stage would increase the required energy for the cracking of more stable structures in coal molecules through the integrated thermal analyzer, thus caused a certain delay of the coal-oxygen chemical reaction. The inhibition effect of sodium hypophosphite with 20% concentration on the gas coal was the best through the experiment selection. The results have important guiding significance for preventing or reducing the spontaneous combustion of mine.

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备注/Memo

备注/Memo:
国家自然科学基金项目(51474086)；河北省自然科学基金项目(E2014209138)；华北理工大学培育基金项目(GP201511)；华北理工大学研究生创新项目(2017S18)
更新日期/Last Update: 2017-10-12