农林生物质微波热解过程影响因素数值模拟研究

NUMERICAL SIMULATION STUDY OF INFLUENCING FACTORS ON MICROWAVE PYROLYSIS PROCESS OF AGROFORESTRY BIOMASS

利用COMSOL有限元软件对3种微波热解影响因素进行计算分析,结果表明在不同波导位置工况下,平均温度差值最大达50%,微波能吸收效率最高可达92%;加入典型吸收剂炭球后可提升生物质对微波能的吸收效率,使得生物质的平均温度升高,能效最高可提高5%;通过给生物质添加旋转速度可优化其温度均匀性,有、无旋转速度的温度标准差相差最大约26%,但旋转速度对温度均匀性的影响较小。

In this paper,COMSOL is used to calculate and analyze three influencing factors of microwave pyrolysis.The results show thatthe maximum difference in average temperature is more than 50%,and the maximum microwave energy absorption efficiency is 92%under the calculation conditions.Adding akindoftypical absorbent agentcarbon spheres can improve the energy absorption efficiency of biomass,resulting in the average temperature of biomassincreasing,and the energy efficiency can be increased by 5%at most.The temperature uniformity of biomass can be optimized by adding rotation speed,the maximum temperature standard deviation difference between with and without rotation speed is about 26%.However,the rotation speed has little effect on the temperature uniformity.