Abstract In a calciner for cement production, limestone (CaCO3) particles are decomposed into quicklime (CaO) and carbon dioxide (CO2) during the calcination process. The complex flow and temperature distribution caused by fuel combustion and calcination reaction of limestone are essential to calciner performance. This paper presents a method by coupling the calcination model and combustion into multiphase flow simulation. In this approach, flue gases, CaCO3, and CaO particles are defined as multiple continuous phases, and heavy oil droplets are defined as discrete phase. This simulation is based on the Euler multiphase model for continuous phase and discrete phase model for the oil phase.The transport of heat, mass, momentum, species and energy among these different phases are calculated by solving the governing equations of each phase with phase-interacting coefficients and models. To verify the accuracy of this modeling approach, numerical predictions were compared with measurement data collected from cement production lines, which yielded satisfactory results. This modeling approach can help optimize calciner design, performance, and process parameters in actual industrial applications.

中文翻译：

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重油燃料工业煅烧炉多相流动及煅烧过程数值模拟

摘要 在水泥生产用煅烧炉中，石灰石 (CaCO3) 颗粒在煅烧过程中分解为生石灰 (CaO) 和二氧化碳 (CO2)。由燃料燃烧和石灰石煅烧反应引起的复杂流量和温度分布对煅烧炉性能至关重要。本文提出了一种将煅烧模型和燃烧耦合到多相流模拟中的方法。在这种方法中，烟气、CaCO3 和 CaO 颗粒被定义为多个连续相，而重油滴被定义为离散相。该模拟基于连续相的 Euler 多相模型和油相的离散相模型。这些不同相之间的种类和能量是通过用相相互作用系数和模型求解每个相的控制方程来计算的。为了验证这种建模方法的准确性，将数值预测与从水泥生产线收集的测量数据进行了比较，取得了令人满意的结果。这种建模方法有助于优化实际工业应用中的煅烧炉设计、性能和工艺参数。