水泥分解炉冷态流动特性的数值模拟研究

Numerical simulation of cold flow characteristics in precalciners of cement industry

选取吉林某3200 t/d新型干法水泥生产线作为研究对象,根据水泥生产线中分解炉设备的实际运行监测数据,使用Ansys-Fluent软件进行仿真数值模拟,分析不同的三次风速以及烟气流速对分解炉炉体内部流场的影响,得到了分解炉内部流场的运动规律,模拟结果与生产线中分解炉的实际运行数据具有良好的相符程度。实验分别设定2组不同的三次风速以及烟气流速,三次风速分别设定为25、30、35 m/s,烟气流速分别设定为30、35、40 m/s,结果发现:烟气流速必须与三次风速匹配,三次风速应与烟气流速具有约5 m/s的差值,建议三次风速设定值在25～30 m/s,烟气流速设定值在30～35 m/s。

A new dry cement production line of 3200 t/d in Jilin was selected as the research object.According to the actual detection data of precalciner in the cement production line,Ansys-Fluent software was used to simulate.By analyzing the influence of three different wind speeds and flue gas velocity on the internal flow field of precalciner,the motion law of the flow field inside the calciner was obtained.The simulation results were in good agreement with the actual operating data.The tertiary air velocity was set to 25 m/s,30 m/s,35 m/s,and the flue gas velocity was set to 30 m/s,35 m/s,40 m/s respectively in the experiment.It turned out:the velocity of flue gas must match with the tertiary air,the tertiary air velocity should have a difference of about 5 m/s with the flue gas flow rate.It is suggested that the three wind speed setting value is 25-30 m/s,and the flue gas flow velocity setting value is 30-35 m/s.