Ignition Mechanism of a Wet Particle of Woody Biomass

This paper presence an analysis of the effect of the moisture content of woody biomass on the mechanisms of its ignition and combustion. Experiments were performed using an experimental setup under heating conditions similar to those in the combustion chamber of typical boiler units (873–1273 K). It was found that ignition occurred in the gas phase at a distance depending on the ambient temperature. The higher the air temperature, the larger the distance from the particle surface to the combustion zone of gaseous products of wood pyrolysis. Based on the results of the experiments, the effect of the type of woody biomass on the characteristics and conditions of fuel ignition was established. The effect of spatial orientation of the wood fiber relative to the heat flux direction on the ignition characteristics and conditions was analyzed.