5407 Numerical analysis of combustion gas flows in a biomass combustion furnace
Details
Biomass fuel mixed high-moisture swine excrement with low quality wood charcoal is burned in the combustion furnace of a fixed-bed type. The three dimensional combustion gas flows in the furnace are analyzed by the finite volume method with the FLUENT software. Combustion reaction is assumed as the one-step overall reaction. Flows in the furnace are composed of swirling and upward flows, and distributions of velocity, temperature and chemical productions such as CO_2 and H_2O are calculated numerically. The CFD results show that the gas flows satisfy the conditions for countermeasures against dioxin. Gas particles are carried to take staying time of more than 2 seconds through high temperature region of over 1,070K.
