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本文用积分近似数值法对电弧等离子体射流点燃煤粉火焰进行了分析研究,探讨了给粉量、电弧功率及煤的种类(不同探发份及不同热值)对煤粉着火的影响,并给出了各种工况下点火室中气相场及颗粒群的速度、温度及浓度剖面分布。所得结论和工业实验及文献[8、9]中实验现象定性符合,有关煤种影响的结论对进一步研制工程装置有参考意义。
In this paper, the integral approximation numerical method is used to analyze the pulverized coal flame ignited by arc plasma jet. The effects of powder feeding amount, electric arc power and types of coal (different probing values and different heating values) on the ignition of pulverized coal are discussed. The distributions of velocity, temperature and concentration profiles of gas phase and particle groups in the ignition chamber under various operating conditions are given. The conclusions obtained are qualitatively consistent with those obtained from industrial experiments and the literature [8,9]. The conclusions concerning the influence of coal types are of reference significance for the further development of engineering installations.