钛渣喷动床沸腾氯化气固两相流数值模拟

基于双流体模型和Gidaspow方程建立了预测钛渣喷动床沸腾氯化的数学模型。首先，采用经验计算公式得到了钛渣最小喷吹速度和最大喷吹高度，并对最小吹动速度进行了修正；其次，最小喷吹速度和相关边界条件为基础，运用Fluent软件模拟了钛渣喷动床沸腾氯化床内气固两相流的流体动力学特征；最后，分析了不同喷吹速度下气固两相流的流动特征和分区特征。结果表明:Gisher && Mathur公式更适合于钛渣喷动床沸腾氯化的最小喷动速度的预测；修正后的最小喷吹速度能够准确的模拟出钛渣喷动床沸腾氯化气固两相流的流体动力学特征；数值模拟得到的床内流动特征、分区的云图和矢量图、固体颗粒轨迹图和最大喷吹高度与相关研究结果一致。 

Numerical Simulation of Titanium Slag Flow Fluid-bed Chlorination in Spout Fluidized Bed

Based on Eulerian two-fluid model and Gidaspow model, a mathematic model for predicting the fluidized chlorination of titanium slag spouting fluidized bed was established. The minimum spouting speed and maximum spouting height of titanium slag spouted bed were obtained by empirical formula, meanwhile the minimum spouting speed was corrected. Then, Based on the minimum spouting speed and the related boundary conditions, hydrodynamic characteristics of gas-solid two-phase flow in titanium slag spouting fluidized bed was simulated by fluent software. At last, the flow characteristics and zoning characteristics of titanium slag spouting fluidized bed at different injection rates were analyzed. The results show that the Gisher && Mathur formula is more suitable for the prediction of the minimum spouting speed in titanium slag spouting fluidized bed. The modified minimum spouting speed can accurately simulate the hydrodynamic characteristics of titanium slag spouted bed. The numerical simulation of the hydrodynamic characteristics, the partition cloud and vector, the solid particle trajectory and the maximum spouting height were consistent with the relevant research results.