Abstract The gas-solid fluidization and coal gasification reactions in a newly-designed dual circulating fluidized bed (CFB) plant were analyzed by full-loop numerical simulation to provide support for industrial applications. The generalized drag model, QC-EMMS, was used in the Eulerian-Eulerian approach to model the entire coal gasification process in a 60 m high dual-CFB pilot plant with a capacity of 100 tons coal per day. The predicted pressures, temperatures, and syngas compositions are more consistent with field test data compared with the results predicted by using the conventional Gidaspow drag model. The unmeasured solid mass circulation rates were accurately predicted by the QC-EMMS model. The characteristics of gas-solid fluidization and coal gasification were estimated by analyzing the flow and reaction details in the plant. These results show that the QC-EMMS drag model has advantages in simulating the complicated gas-solid flows and reactions in large-scale CFB plants.

中文翻译：

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基于广义阻力模型QC-EMMS的双循环流化床装置煤气化数值研究

摘要 对新设计的双循环流化床(CFB)装置的气固流化和煤气化反应进行全回路数值模拟分析，为工业应用提供支持。广义阻力模型 QC-EMMS 在欧拉-欧拉方法中用于模拟 60 m 高的双 CFB 试验工厂中的整个煤气化过程，该试验工厂的产能为每天 100 吨煤。与使用常规 Gidaspow 阻力模型预测的结果相比，预测的压力、温度和合成气成分与现场测试数据更加一致。QC-EMMS 模型准确预测了未测量的固体质量循环速率。通过分析装置中的流动和反应细节，估计了气固流化和煤气化的特性。