Abstract
In order to improve the quality of biomass pyrolysis gas, the biomass needs to be deal with dry pretreatment. On the basis of comprehensive analysis of the principle of hot air drying, the authors designed a biomass dry pretreatment system using the hot discharge air of biomass retort as a heat source, which consisted of preheating layer, drying layer and aggregation layer. This paper analyzed the structure of preheating layer and aggregation layer of the dryer, determined the operating parameters of the system, used the iterative method to calculate the temperature of the gas at each time node by MATLAB, obtained the temperature change curve of the hot gas. The study indicates that the temperature of the heat source gas is the main factor affecting the drying efficiency and the dry pretreatment system can be used as a pretreatment device for biomass pyrolysis.
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