Separation of wood combustion particles by controlled particle growth and particle impaction with wet surface

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This paper deals with experimental separation of fine combustion particles emitted by domestic biomass combusting boilers. The research focuses on the particle size ranging from 20 to 450 nm representing significant health risk. Particular steps are focused on lowering the flue gas temperature and quantifying its influence on fine particle growth and subsequent separation. In the first step, controlled cooling of the flue gas is performed using a heated hose with controlled temperature. Decreasing the flue gas temperature contributes to an increase in the concentration of particles and their size. In the second step, the impact of contact of the flue gas with a water surface is studied. A significant decrease in the concentration of particles of over 200 nm has been observed. A much less sensitive response to the presence of a water surface has been observed in particles of 50 – 150 nm.

This paper deals with experimental separation of fine combustion particles emitted by domestic biomass combusting boilers. The research focuses on the particle size ranging from 20 to 450 nm representing significant health risk. Particular steps are focused on lowering the flue gas temperature and quantifying its influence on fine particle growth and subsequent separation. In the first step, controlled cooling of the flue gas is performed using a heated hose with controlled temperature. Decreasing the flue gas temperature contributes to an increase in the concentration of particles and their size. In the second step, the impact of contact of the flue gas with a water surface is studied. A significant decrease in the concentration of particles of over 200 nm has been observed. A much less sensitive response to the presence of a water surface has been observed in particles of 50 – 150 nm.

biomass, fine particles, particulate matter, combustion, SEM, morphology, SMPS

05.11.2021