Oxygen-enriched combustion characteristics of typical coals in China

In order to completely elucidate the different coal's combustion performances under oxygen enriching condition-and provide reference for oxygen concentration selection,boiler and burner design,as well as the heating surface arrangement,the ignition temperature,burn-out rate,slagging characteristic of typical bituminous coal and lean coal were tested on a one-dimensional flame fire furnace and a modified pulverized coal-air flow test furnace under different oxygen concentrations.The results show that the ignition temperature decreases and the burnout rate raises with the increasing of oxygen concentration.The enriched-oxygen combustion can improve combustion stability and combustion economy of coal.Likewise,the combustion peak temperature increases and slagging aggravates.It should be noted that the effects of oxygen concentration on the combustion performance for different type coal are varied.The coal sample needs to be tested with specific oxygen-enriched combustion to determine its combustion performance.