Experimental study on the fouling behaviour of an underfeed fixed-bed biomass combustor

The measured deposition rates fluctuated between 7 and 28 g/m2 h. A greater amount of total airflow, an increase in the primary air inlet and a lower water temperature increased the deposition mass. In addition, the deposition rate decreased with time and did not appear to follow a linear pattern, which likely indicates that after a strong initial fouling rate, removal and collapse mechanisms begin to counter-balance the arrival of particles, which stabilizes the fouling layer.