摘要：Multistage fluidized bed reactors have advantages for higher gas-solids contact efficiency in uranium recycling processes, where uranium compound powders used have high densities, usually several times greater than those in chemical industry. However, little literature has compared hydrodynamics and operation of multistage fluidized beds used particles with significantly different densities. In this study, we compared similarities and differences in hydrodynamics and operational characteristics for wolfram carbide (15,630 kg/m3) and FCC (2200 kg/m3) powders with similar size in a three-stage fluidized bed. During the start-up period, severe difficulties were experienced in achieving stable operation with FCC particles. During stable operating range, the experimental results indicated that stable fluidization and circulation were achievable with two types of particles in the multistage fluidized bed, but large pressure drop fluctuation (FCC: 10–30 Pa; WC: 100–800 Pa) and wider stable operating range (FCC: 0.01–0.29 m/s; WC: 0.04–0.69 m/s) were observed using high-density particles. Higher-pressure drop distributors optimize high-density particles operation in multistage fluidized beds, improving fluidization quality while maintaining operating velocities within stable operating ranges. ? 2025 Elsevier B.V.

ISSN号：0032-5910

卷、期、页：卷465

发表日期：2025-11-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Powder Technology

参与作者：Wu, Xiuhua

通讯作者：张一鸣,许凡,王欢

第一作者：张永民,李舒月

论文类型：期刊论文

论文概要：张一鸣,许凡,王欢,张永民,李舒月,Wu, Xiuhua，Comparison of hydrodynamics and operational characteristics of a multistage fluidized bed with high-density and low-density powders，Powder Technology，2025，卷465

论文题目：Comparison of hydrodynamics and operational characteristics of a multistage fluidized bed with high-density and low-density powders