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以SLC-S分解炉为基准模型,新增一个物料进口,分别对两物料进口在不同的相对位置时的气固两相流场进行了数值模拟。对连续相、颗粒相的计算分别采用k-ε双方程湍流模型和离散相模型,对离散相与湍流之间的相互作用采用随机跟踪模型。模拟所得的气流场分布规律与模型实测结果吻合较好,而且所预测的固、气停留时间以及固气停留时间比值与模型实验预测值相一致。对结构进行优化的模拟结果表明:当两物料进口之间的水平投影夹角大于或等于135°时,尤其是在157.5°时,物料在分解炉内的分散状况皆良好,物料停留时间的绝对值和固气停留时间比值皆很高,为适宜的夹角范围。
SLC-S decomposition furnace as a reference model, a new material imports, respectively, two materials imported at different relative positions when the gas-solid two-phase flow field numerical simulation. For the continuous and granular phases, the k-ε two-equation turbulence model and the discrete phase model are used respectively, and the stochastic tracking model is used for the interaction between discrete phase and turbulence. The distribution of the simulated airflow field is in good agreement with the measured data, and the predicted solid-gas residence time and solid-gas residence time are in good agreement with the model predictions. The results of simulation on the structure show that when the horizontal projection angle between the two material inlets is greater than or equal to 135 °, especially at 157.5 °, the dispersion of the material in the calciner is good and the absolute value of the material residence time Value and solid gas residence time ratio is very high, suitable angle range.