Dual-loop circulating fluidized bed (CFB) reactors have been widely applied in industry because of their good heat and mass transfer characteristics and continuous handling ability. However, the design of such reactors is notoriously difficult owing to the poor understanding of the underlying mechanisms, meaning it has been heavily based on empiricism and stepwise experiments. Modeling the gas-solid CFB system requires a quantitative description of the multiscale heterogeneity in the sub-reactors and the strong coupling between them. This article proposed a general method for modeling multiloop CFB systems by utilizing the energy minimization multiscale (EMMS) principle. A full-loop modeling scheme was implemented by using the EMMS model and/or its extension models to compute the hydrodynamic parameters of the sub-reactors, to achieve the mass conservation and pressure balance in each circulation loop. Based on the modularization strategy, corresponding interactive simulation software was further developed to facilitate the flexible creation and fast modeling of a customized multi-loop CFB reactor. This research can be expected to provide quantitative references for the design and scale-up of gas-solid CFB reactors and lay a solid foundation for the realization of virtual process engineering.

双回路循环流化床（CFB）反应器因其良好的传热传质特性和连续处理能力而在工业上得到了广泛应用。然而，由于对基本机理的了解不足，这种反应器的设计非常困难，这意味着它很大程度上是建立在经验主义和逐步实验的基础上的。对气固CFB系统进行建模需要定量描述子反应器中的多尺度异质性及其之间的强耦合性。本文提出了一种利用能量最小化多尺度（EMMS）原理建模多回路CFB系统的通用方法。通过使用EMMS模型和/或其扩展模型来计算子反应器的流体动力学参数，实施了全循环建模方案，在每个循环回路中实现质量守恒和压力平衡。基于模块化策略，进一步开发了相应的交互式仿真软件，以促进定制多回路CFB反应器的灵活创建和快速建模。预期该研究将为气固式CFB反应器的设计和规模化提供定量参考，并为实现虚拟工艺工程奠定坚实的基础。