Analysis on retention of alkali metals in updraft biomass gasifier
WANG Jianwei
LIU Ning
ZANG Hongyu
LI Longzhi
Abstract：A novel device was designed allowing direct combustion and updraft gasification combustion with peanut shell,cotton stalk and corn stalk particles as feeds.The alkali metals content in the flue gas produced from the device in the direct combustion and updraft gasification combustion processes was tested.The experimental results show that the alkali metals content in updraft combustion process is much lower than that in the direct combustion process,although there is a difference in the alkali metals content among these three fuels.It illustrates that the updraft gasifier has a unique fiher retention effect on volatile alkali metals using biomass as feedstock,which can effectively alleviate the alkali metals corrosion of the downstream heat equipment.Therefore,updraft biomass gasifier is a better alternative coal renewable energy utilization equipment.
Keywords：biomassgasificationalkali metalscombustion
Publication Date：2017-01-01