自燃煤矸石山爆炸的热力学模拟

Thermodynamic simulation of explosion of self-combustion gangue heap

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.