A fluidized bed heated by multi-stage resistance heaters was utilized innovatively to realize independent heating of different inside zones. A steady-state physical and mathematical model was developed to study the effect of dense phase, freeboard, fluidized carrier gas on temperature distribution in the fluidized bed. The results showed that compared with the experimental values, the differences between the calculated temperature, heat transfer coefficient and fluid velocity at the outlet of fluidized bed by the model were within 15%, 17%, and 14% respectively, indicating that the model had high reliability. The model inversion illustrated that the heat transfer coefficient at the outlet of the fluidized bed increased gradually in the order of the fluidized carrier gas temperature, dense phase temperature, fluidized carrier gas velocity and freeboard temperature. The heat transfer simulation took the height of the dense phase and the freeboard as the input parameters of the model by hundreds of iteration, the calculated results confirmed again that the existence of particles in the dense phase increased its heat transfer efficiency with the gas and the wall, ultimately making the dense phase as the main heat transfer zone.

创新地利用了由多级电阻加热器加热的流化床，以实现对不同内部区域的独立加热。建立了稳态物理和数学模型，以研究密相，干馏，流化载气对流化床温度分布的影响。结果表明，与实验值相比，该模型在流化床出口的计算温度，传热系数和流速之间的差异分别在15％，17％和14％以内，表明该模型具有高可靠性。模型反演表明，流化床出口的传热系数按流化载气温度，密相温度，流化的载气速度和干舷温度。传热模拟以密相高度和干舷为模型的输入参数，经过数百次迭代，计算结果再次证实，密相中存在的颗粒会随着气体和气体的传热而提高其传热效率。壁，最终使致密相成为主要的传热区。