This study proposed a novel fluidized bed (NRFB) accompanied by grid trays, air distributor, and other internals, which can realize the continuous production of gas–solid non-catalytic reactions. In the reactor, the reverse flow of the gas–solid phase enabled the solid particles to contact efficiently with the gas and to produce solid particles. The discrete phase model was used to simulate the characteristics of the gas–solid two-phase flow and distribution in NRFB with different types of air distributors and different amounts of grid trays. The improved equal-area torus method and the uniformity index were used to quantitatively investigate the particle’s time-average radial concentration in NRFB. The results show that the air distributor can effectively ensure the uniform distribution of gas in the discharge area in NRFB. “Core-annulus” structures occur in the dense phase section in the NRFB without grid tray. The radial distribution uniformity of particle concentration can be improved by about 17% with 9 grid trays installed in NRFB, and more particles would stay in the dense phase section, which is more suitable for reaction, which can effectively improve the reaction efficiency. The guidance for the construction of experimental equipment and fluidization operation can be provided by the results, which are of great significance for the continuous production of “gas–solid non-catalytic reactions” in fine chemical industries.

本研究提出了一种新型流化床（NRFB），配有网格托盘、空气分配器和其他内部构件，可以实现气固非催化反应的连续生产。在反应器中，气固相的反向流动使固体颗粒与气体有效接触并产生固体颗粒。采用离散相模型模拟了不同类型空气分布器和不同数量网格塔盘的NRFB中气固两相流动和分布的特性。采用改进的等面积环面法和均匀度指数定量研究NRFB中颗粒的时均径向浓度。结果表明，空气分布器能够有效保证NRFB放电区域气体的均匀分布。 “核-环”结构出现在无网格托盘的 NRFB 的密相部分。 NRFB内安装9个格栅托盘后，颗粒浓度径向分布均匀性可提高约17%，更多颗粒停留在密相段，更适合反应，可有效提高反应效率。研究结果可为实验装置建设和流化操作提供指导，对于精细化工行业“气固非催化反应”的连续化生产具有重要意义。