While providing a fast and accurate tool for simulating fluidized beds, the major limitations of classical zero-dimensional ideal reactor models used in process simulations become irreconcilable, such as models built into commercial software (e.g. Aspen Plus®). For example, the limitations of incorporating heat absorption by the water wall and super-heaters and inferring thermal reciprocity between each reactor model/module. This paper proposes a novel modelling approach to address these limitations by incorporating an external model that marries the advantages of the zone method and Aspen Plus to the greatest extent. A steady state operation of a 0.3 MW atmospheric bubbling fluidized-bed combustor test rig was simulated using the developed modelling approach and the results were compared with experimental data. The comparison showed that the predictions were in agreement with the measurements. Further improvement is to be expected through incorporating more realistic zoned geometry and more complex reaction mechanisms. In addition, the developed model has a relatively modest computing demand and hence demonstrates its potential to be incorporated into process simulations of a whole power plant.

在提供快速而准确的工具来模拟流化床的同时，过程模拟中使用的经典零维理想反应器模型的主要局限性也变得不可调和，例如内置于商业软件（例如AspenPlus®）中的模型。例如，合并水冷壁和过热器吸收热量以及推断每个反应堆模型/模块之间的热可逆性的局限性。本文提出了一种新颖的建模方法，通过结合外部模型来解决这些限制，该外部模型最大程度地结合了区域方法和Aspen Plus的优点。使用开发的建模方法对0.3兆瓦大气压鼓泡流化床燃烧器试验装置的稳态运行进行了模拟，并将结果与​​实验数据进行了比较。比较表明，预测结果与实测值吻合。通过合并更逼真的分区几何形状和更复杂的反应机制，可以期待进一步的改进。另外，所开发的模型具有相对适中的计算需求，因此证明了其被整合到整个发电厂的过程仿真中的潜力。