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。
Abstract
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.
关键词
生物质 /
微波 /
热解 /
吸收剂 /
数值模拟 /
能效
Key words
biomass /
microwaves /
pyrolysis /
microwave-absorbent agent /
simulation /
energy efficiency
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