Energy Balance Analysis on a Preheating Catalytic Oxidation Device of Coal Mine Ventilation Air Methane
Mao Ming-ming, Liu Yong-qi*, Liu Rui-xiang, Zheng Bin, Meng Jian
School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255049, China
Energy balance analysis was carried out during the operation process of a preheating catalytic oxidation device of coal mine ventilation air methane. The effects of space velocity, inlet gas temperature and methane volume concentration on each energy balance term were studied. The experimental results show that: the exothermic oxidation power and the surface heat dissipation power loss rise with the increase of methane volume concentration and the oxidation bed inlet temperature, and yet fall when space velocity achieves a high enough value; the exhaust heat power loss is enhanced significantly with the growth of the inlet temperature and space velocity, but the change of methane volume concentration has very little influence on the exhaust heat loss power; the fraction of the exhaust heat loss descends significantly with the increase of methane volume concentration and inlet temperature, and yet rises obviously with the improvement of space velocity. The above results provide a theoretical guidance on the stable self-heating maintenance operation of the preheating catalytic oxidation device.
Keyword: Catalytic oxidation, Energy balance, Parametric study, Ventilation air methane.
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