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应用计算流体动力学对某5 000 t/d生产线所用分解炉进行了数值模拟,获得了分解炉的速度场、颗粒轨迹、温度场、煤粉燃烧与碳酸钙分解情况。结合分解炉实际运行状况,验证了模拟结果的准确性。着重对模拟结果所反映的分解炉运行问题进行了诊断,主要包括三次风单向入炉引起分解炉不同截面速度分布极不均匀,鹅颈管出口两侧流量差别较大,分解炉锥部温度过高,而上部高温区呈现顺时针旋转向上运动的趋势等,并给出了分解炉运行的优化建议。
The calciner used in a 5 000 t / d production line was simulated by computational fluid dynamics. The velocity field, particle trajectory, temperature field, pulverized coal combustion and decomposition of calcium carbonate were obtained. Combined with the actual operation of the calciner, the accuracy of the simulation results is verified. Focusing on the diagnostic results of the decomposing furnace operation problems were diagnosed, including three-way unidirectional furnace into the furnace caused by different sections of the decomposition furnace speed distribution is extremely uneven, large flow on both sides of the gooseneck discharge, decomposition furnace cone temperature Too high, while the upper part of the high temperature zone shows a clockwise rotation upward trend, and gives the optimization of furnace operation.