Geometrical Optimization of the Flue Gas Path with Regard to the Reduction of Particulate Matter

Exhaust gases from combustion plants contain complex mixtures of air pollutants, of which many are harmful to human health. From all of these pollutants, particulate matter has the greatest negative effect on health. Small heat sources with biomass combustion are associated with high concentrations of particulate matter. It is crucial to reduce the quantities of solid particles getting into the atmosphere in every region of their formation in order to decrease environmental pollution and to improve the air quality. The main subject of this paper is the optimisation of the geometrical parameters of fireplace with the focus on exhaust gas path. A numerical model of tunnel labyrinth was created in order to investigate the behaviour of PM emitted into the ambient air from combustion process in the small heat sources. The results indicate that the modification of geometrical parameters has an impact on PM concentration in flue gas and on its separation.