Influence of multi-factor interactions on particle growth during top-spray fluidized bed agglomeration--颗粒学报PARTICUOLOGY

Wang, C., Ma, J., Cai, J., Pu, H., & Chen, X. (2024). Influence of multi-factor interactions on particle growth during top-spray fluidized bed agglomeration. Particuology, 94, 173-186. https://doi.org/10.1016/j.partic.2024.08.003

Influence of multi-factor interactions on particle growth during top-spray fluidized bed agglomeration

Chunyin Wang, Jiliang Ma^*, Jialiang Cai, Han Pu, Xiaoping Chen

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China

10.1016/j.partic.2024.08.003

Volume 94, November 2024, Pages 173-186

Received 13 April 2024, Revised 23 July 2024, Accepted 5 August 2024, Available online 10 August 2024, Version of Record 24 August 2024.

E-mail: jlma@seu.edu.cn

Highlights

• Agglomeration process in a top-spray fluidized bed was studied.

• Response Surface Methodology was employed to reveal the multi-factor interactions.

• Effects of various operating parameters on agglomerate properties were examined.

• Mean particle size, particle size distribution, and sphericity were measured.

Abstract

Considering the strong dependence of agglomerate characteristics on various operating parameters, this study employs the control variable methodology (CVM) and response surface methodology (RSM) to investigate the influence of multi-factor interactions on particle growth during top-spray fluidized bed agglomeration. First, CVM is conducted to assess the effects of individual operating parameters on the agglomerate properties, such as mean particle size, relative width, and sphericity. Then, the interactive relationship between these input variables and the quality attributes of the process is investigated using RSM. The results show that the mean particle size increases with the increase of binder viscosity and spray rate, while it decreases with the increase of fluidization gas velocity and inlet gas temperature. The relative width of the particle size distribution increases with the spray rate, binder viscosity, and fluidization gas velocity, and hardly changes with the inlet gas temperature. The mean particle size is more sensitive to the binder spray rate at a lower level of fluidization gas velocity or a higher level of inlet gas temperature. The fluidization gas velocity corresponding to the maximum D₅₀ changes when the binder viscosity and binder spray rate are at different levels.

Graphical abstract

Keywords

Top-spray fluidized bed granulation; Agglomeration; Response surface methodology; Particle size distribution

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