Abstract: Based on the analysis of heat transfer process of liner type double heated biomass pyrolysis reactor designed by the author, the heat mathematical models of reactor wall's conduction heat transfer, heat transfer among particles and two-dimensional convective heat transfer were established according to the reactor's complex internal heat transfer characteristics. This model contained a variety of heat transfer methods such as heat transfer between thermal bed material and biomass powder, heat convection of biomass powder and heat carrier gas, radiation heat transfer from the wall to biomass powder and bed material, etc. Finally, the heat transfer model was determined by simulation analysis. The simulation results show that the coupling simulation model can meet the requirement of rapid pyrolysis of biomass particles, and the average temperature of outlet gas phase is about 720 K.

Key words: biomass pyrolysis, heat transfer process, heat transfer model, simulation