微波反应器加热效率及均匀性仿真优化

Simulation and optimization of heating efficiency and uniformity on microwave reactor

利用COMSOL Multiphysics多物理场仿真软件采用有限元分析方法建模仿真了负载半径、负载位置和馈入功率相关参数对微波反应器内负载温度分布均匀性及反应器加热效率的影响,探究表明:负载半径和负载位置的变化导致微波反应器中负载温度均匀性以及加热效率的改变,而波导馈入功率的改变则仅仅改变负载的升温速率,导致负载中的温差差异明显;优化出当负载半径为32 mm,负载位置为10 mm以及馈入功率为10 k W时,微波反应器获得最优的加热均匀性,加热效率达到99%以上。同时考察了不同速度下的连续式微波反应器内的温度分布,结果表明:负载运行速度越大,体系平均温度越低,同时连续式微波反应器出口的温度随负载运行速度增大而减小。

Based on the COMSOL Multiphysics simulation software,the heating efficiency and sample temperature distribution uniformity of microwave reactor related with the radius and position of sample,the power of feed was investigated by using finite element analysis method. The results show that the change of sample radius and sample position leads to the change of sample temperature uniformity and heating efficiency in microwave reactor,and the change of wave guide feeding power only changes the sample rate of heating caused by the difference in temperature difference between the sample. When the sample radius is 32 mm,the sample position is 10 mm and the feed power is 10kW,the microwave reactor obtains the optimal heating uniformity,and the heating efficiency is over 99%. At the same time,the temperature distribution in the continuous microwave reactor at different speeds is investigated.The results show that the higher the sample speed is,the lower the average temperature,and the temperature of the continuous microwave reactor outlet increases with the sample running speed reduced.