Abstract A study has been carried out on the hydrodynamic performance of a fountain confinement device used in conical spouted beds for the treatment of Geldart A and B type particles. Stability and particle elutriation have been analysed for beds provided only with this device and those provided with this device and two types of draft tubes, namely, open sided draft tube and nonporous draft tube. Stability is greatly improved when only the fountain confiner is used, but the draft tubes are required for significantly avoiding bed elutriation in spouted beds. The modified conical spouted bed has been located in a map of operating conditions together with the remaining gas-solid contact regimes. The fountain confiner provides a dramatic increase in the applicability range of spouted beds. Thus, unlike the traditional use of spouted beds for Geldart D type particles, this device allows operation with Geldart A, B and D particles, with a small fraction of C particles.

中文翻译：

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一种用于锥形喷流床细砂和超细砂流化的新型喷泉限流装置

摘要 对用于处理 Geldart A 和 B 型颗粒的锥形喷流床中使用的喷泉限制装置的流体动力学性能进行了研究。对仅配备此装置的床和配备此装置的床和两种类型的引流管（即开口引流管和无孔引流管）的稳定性和颗粒淘析进行了分析。仅使用喷泉限制器时稳定性大大提高，但需要引流管以显着避免喷射床中的床淘析。改进后的锥形喷射床与剩余的气固接触方式一起位于操作条件图中。喷泉限制器显着增加了喷射床的适用范围。因此，