Development of a Modified Updraft Fixed Bed Gasifier Fed by Solid Biomass

摘要

To more efficiently convert solid biomass into useful heat and power, this study develops a modified updraft fixed bed gasifier with an embedded combustor. The unique feature of the modified updraft fixed bed gasifier is the embedded combustor inside the gasifier. The inserted tube has numerous small holes on its lower wall, which allow the entrainment of the syngas generated by the gasifier. By introducing the secondary combustion air, the syngas is combusted fully inside the combustor without any assisting fuel and without any de-tar procedure. The flue gas generated by the current design is high in temperature but low in pollutions. The preliminary study shows the newly developed system possesses good flexibility in using different solid biomass and the system also demonstrated very stable and reliable performance.