Experimental Investigation of Concentration and Size Distribution of Fine Combustion Particles Emitted by Small Biomass Boiler under Various Operation Conditions

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To reduce the production of fine particles during biomass combustion it is crucial that the surface temperature of the combustion chamber walls is sufficiently high. In a heated combustion chamber a smaller number of particles are formed than in a chamber with cold walls. During the ignition of fuel in a heated chamber there is significantly lower production of fine particles compared to a cold start. During combustion in a well heated combustion chamber only a slight difference in the production of fine particles was observed using various fuel pellets. The production of fine particles is greater when using agro-pellets (produce 30% more particles on average during all the tested operating conditions) The difference is especially apparent in the cold start period and during the subsequent steady burner operation. After heating the uncooled surfaces of the boiler to 200°C, the difference between spruce-pellet and agro-pellet combustion diminishes

To reduce the production of fine particles during biomass combustion it is crucial that the surface temperature of the combustion chamber walls is sufficiently high. In a heated combustion chamber a smaller number of particles are formed than in a chamber with cold walls. During the ignition of fuel in a heated chamber there is significantly lower production of fine particles compared to a cold start. During combustion in a well heated combustion chamber only a slight difference in the production of fine particles was observed using various fuel pellets. The production of fine particles is greater when using agro-pellets (produce 30% more particles on average during all the tested operating conditions) The difference is especially apparent in the cold start period and during the subsequent steady burner operation. After heating the uncooled surfaces of the boiler to 200°C, the difference between spruce-pellet and agro-pellet combustion diminishes

Nanoparticles, biomass combustion, fine particles, air pollution

17.06.2019