Abstract: A new type of internal baffles has been developed for the purpose of improving the performance of gas-fluidized bed. The fluidizing behavior of the new pagoda type baffles has been studied in a two-dimensional bed in comparison with those of other types, and both photographs and moving pictures have been taken to demonstrate their viability in breaking up bubbles and enhancing gas-solid contact. The pagada baffles installed in a 30-cm-dia. pilot plant fluid-bed reactor for manufacturing phthalic anhydride from catalytic oxidation of naphthalene have been found to increase the feed load from 50-100 to 100-160 grams per hour per kilogram of catalyst, as compared to horizontal baffles originally used in the same reactor, corresponding to an increase in duty of 50 to 100%. The experimental data has been treated with a two-phase model. Results show that fluidized reactor with pagoda internal baffles has a very high interchange coefficient between the bubble phase and emulsion phase.

摘要： 为了改善气-固流化床反应器的流化质量,本文提出了一种新型内构件。首先在二维床中对新的塔型构件的行为进行了研究,并且与其他类型构件进行了对比。所拍摄的照片和电影显示了塔型构件对气泡的破碎能力和对气固两相接触的增进。 塔型构件在萘催化氧化制苯酐的流化床反应器中进行了中间试验。试验结果表明,与床内原来使用的水平挡板相比较,催化剂萘负荷从50—100提高到了100—160g/kg催化剂·h,从而使生产能力可提高50—100％。 试验结果用两相模型进行了关联。结果表明,采用塔型内件的流化床反应器有很高的泡相和乳相间的交换系数。