【摘要】 基于煤粉柔和气化炉工况特征,设计了热负荷0.5 MW的煤粉气化炉模型,采用数值模拟手段研究了冷态情况下射流喷嘴相对位置、射流速度、煤粉粒径对烟气回流、停留时间、颗粒浓度的影响,以及热态情况下变工况条件对炉膛温度场、组分场分布和碳转化率的影响,并将热态模拟结果与实验结果进行了对比,验证了模拟结果的正确性。更多还原

【Abstract】 Based on the characteristics of a pulverized coal mild gasifier, a model of gasifier with a load of 0.5 MW was designed. Numerical simulation was used to study the influence of the nozzle position, the jet velocity, and the particle size of pulverized coal on the flue gas recirculation ratio, residence time and particle concentration under the cold condition, as well as the effect of the change of working conditions on the furnace temperature field, component field distribution and carbon conversion rate under the hot condition. The thermal simulation results were compared with the experimental results to verify the correctness of the simulation results.更多还原