【摘要】 介绍了一种新的分级气流床气化炉,并利用激光颗粒动态分析仪对分级气化炉模型内的流场进行了速度测量,分析了二次气流对气化炉内三维速度分布的影响.测量结果表明,二次气流的加入增强了气化炉内的混和,对于气化反应的进行是有利的.在二次喷嘴的一定高度范围内,二次气流对壁面处流场的影响较大,工业生产中应该选择合理的二次喷嘴位置和气流量,避免二次气流对喷嘴附近的回流产生较大干扰,影响喷嘴气流的着火燃烧.更多还原

【Abstract】 A new-type staged entrained flow gasifier was introduced and the flow field in this gasifier was measured using laser particle dynamic analyzer.Effect of the second airflow on the three-dimensional velocity distribution in the gasifier was analyzed.The test results show that the mixing in the gasifier was strengthened by adding the second airflow,and it is helpful to the gasification.In the area of the top one-third of the gasifier height,the second airflow has strong effect on the flow field near the wall.The second nozzle position and the flow rate should be selected carefully during industrial application to avoid the disturbance of the second airflow on the recirculation near the main nozzle.更多还原