煤燃烧过程中气态氟化物生成机理

为了研究燃煤过程中气态氟化物生成机理，在燃煤过程中气态氟化物生成特性试验研究的基础上，根据煤中氟的赋存形态、含氟矿物的热分解特性和煤的燃烧过程，通过固定床管式炉燃煤氟析出等温动力学实验建立了燃煤过程中气态氟化物生成动力学模型。结果表明，燃煤过程中气态氟化物生成可用一级反应动力学来描述，反应活化能E和频率因子A依赖于煤中氟的赋存形态和热稳定性，对于实验煤种A在12．5-46．0min^-1，E在28．0-65．1kJ．mol^-1。研究结果对揭示不同燃烧设备条件下煤中氟的燃烧转化规律、进行燃煤大气氟污染治理有理论指导意义。

Kinetic mechanism of vapor-phase fluorine emission during coal combustion

In order to study the vapor-phase fluorine emission chemical procedure and mechanism during coal combustion, the kinetics model and parameters of vapor-phase fluorine emission during coal combustion are established successfully according to the mode of occurrence of fluorine in coal, pyrolytic decomposition characters of fluorine-bearing minerals in coal and coal combustion procedure. Kinetics calculation shows that fluorine emission during coal combustion is the first order and the activation energy between 28.0-65.1kJ.mol^-1, frequency factor between 12.5-46.0 min^-1 according to fixed bed tube furnaces combustion experimentation. The activation energy and frequency factor depend on the mode of occurrence of fluorine in coal and the thermal stability of fluorine-bearing minerals in coal. The research results will be significant for combustion transfer of fluorine and atmospherics fluorine pollution controlling technology in different coal-burning equipment.