微波辅助煤炭脱硫的多物理场耦合计算研究

Study on Multiphysics Coupling Calculation for Microwave-Assisted Coal Desulfurization

针对高硫煤脱硫研究中存在实验研究周期长,且实验过程中可能由于温度分布不均匀导致热点或热失控的安全隐患问题,多物理场耦合计算能够发挥重要作用。通过多物理场耦合计算的方法对微波辅助高硫煤脱硫过程进行研究,分析微波辐照功率、氧化剂配比、辐照温度、辐照时间对煤样脱硫率的影响,并分析搅拌速率对加热均匀性的影响,从而得到微波脱硫的最佳工艺条件,并对微波脱硫最佳工艺条件下的电场和温度场分布进行分析。结果表明,在最佳工艺条件下,煤样脱硫率较高,电场和温度场分布较均匀且无明显热点产生。

For high-sulfur coal desulfurization research,the experimental research period is long,and the experimental process may cause hot spots or thermal runaway due to uneven temperature distribution.Multi-physics coupling calculation can play an important role.In this paper,the microwave-assisted high-sulfur coal desulfurization process is studied using the method of multi-physics coupling calculation,and the influence of microwave radiation power,oxidant ratio,radiation temperature,and radiation time on the desulfurization rate of coal samples is analyzed,and the effect of stirring rate on the desulfurization rate is analyzed.The influence of heating uniformity is used to obtain the optimal process conditions of microwave desulfurization,and the electric field and temperature field distribution under the optimal process conditions of microwave desulfurization are analyzed.The results show that the best process conditions are obtained by introducing the multi-physics coupling calculation method into the microwave desulfurization research.The results show that under the optimal process conditions,the coal sample has a high desulfurization rate,and the electric field and temperature field are distributed uniformly without obvious hot spots.