煤粒群着火模型计算

Mathematical Model of Ignition for the Cluster of Coal

本文以煤均匀着火理论和气固化学反应理论为基础,建立了描述煤颗粒群着火的数学模型,并以单颗粒型煤为例,用该模型对型煤着火前内部温度场及型煤表面附近氧和挥发分气体浓度场进行了计算。计算结果与实验结果基本符合。

A mathematical model of ignition for the cluster of coal is put forward based on the theories of the homogeneous ignition and gas-solid reactions, by which the interior temperature field of the cluster and the concentration distributions of both oxygen and gaseous products of combustion near the cluster surface are calculated numerically in the period of ignition. The results by the model are in agreement with those measured in experiment with a single briquette.