摘要
通过对自燃煤矸石山内部烟气的平衡浓度(ψ)与温度(T)、压力比(p/p^θ)、水-空比(OL)之间关系的热力学模拟,得到了自燃煤矸石山发生爆炸的热力学条件.当α=100,p/p^θ=100,T=800~1200K时,煤矸石燃烧烟气中CO,CO2,H2,CH4和水蒸气的平衡浓度分别为:0.002~0.422,0.034~0.170,0.049~0.126,0.005~0.355和0.004~0.904,CO,H2,CH4爆炸性气体可发生化学爆炸.当α=100,p/p^θ=100,T=1200~1800K时,煤矸石燃烧烟气中CO,CO2,H2,CH4和水蒸气的平衡浓度分别为:3.8×10^-5~0.002,0.004~0.034,0.003~0.055,0~0.005和0.904~0.993,“烟气”中主要是高温高压水蒸气,可发生物理爆炸.
Through doing thermodynamic simulation on the relationships among equilibrium concentration of gangue heap exhausted gas(ψ) to temperature (T), pressure ratio (p/p^θ) and proportion of vapor in air and gas concentration of self-combustion gangue heap, the thermodynamic condition of spontaneous gangue heap to explode was got. Chemical explosion is possible to happen when α = 100, p/p^θ = 100, T = 800 - 1 200 K and the equilibrium concentration of CO, CO2, HE, CH4 and vapour is 0. 002 -0. 422, 0. 034 -0. 170, 0. 049 -0. 126, 0. 005 -0. 355 and 0. 004 -0. 904. Physical explosion is possible to happen when α = 100, p/p^θ = 100, T = 1 200 - 1 800 K and the equilibrium concentration of CO, CO2, H2 , CH4 and vapour is 3.8 × 10^-5 -0. 002, 0. 004 -0. 034, 0. 003 - 0. 055, 0 - 0.005 and 0. 904 - 0. 993, because the main composition of gas is vapor with high temperature and high pressure.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2007年第9期945-949,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(50274061)
河南省高校新世纪优秀人才支持计划资助项目(2005HANCET-05)
关键词
煤矸石山
自燃
爆炸
热力学
coal gangue heap
spontaneous combustion
explosion
thermodynamics