A state-of-the-art review on transition between the fast fluidization and pneumatic transport of Geldart group B particles--颗粒学报PARTICUOLOGY

Deng, B., Zhang, Y., Zhang, M., Ding, Y., Zhou, T., Yang, X., . . . Yue, G. (2023). A state-of-the-art review on transition between the fast fluidization and pneumatic transport of Geldart group B particles. Particuology, 73, 78-94. https://doi.org/10.1016/j.partic.2022.03.007

A state-of-the-art review on transition between the fast fluidization and pneumatic transport of Geldart group B particles

Boyu Deng ^a, Yi Zhang ^b, Man Zhang ^a, Yi Ding ^c, Tuo Zhou ^a, Xinhua Yang ^a, Zhong Huang ^a, Hairui Yang ^a *, Guangxi Yue ^a

a State Key Laboratory of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, China
b China Electric Power Planning & Engineering Institute, Beijing, 100120, China
c SDIC Power Holding Co., Ltd, Beijing, 100034, China

10.1016/j.partic.2022.03.007

Volume 73, February 2023, Pages 78-94

Received 4 December 2021, Revised 20 March 2022, Accepted 24 March 2022, Available online 4 May 2022, Version of Record 18 May 2022.

E-mail: yhr@mail.tsinghua.edu.cn

Highlights

• Transition between the fast fluidization and pneumatic transport was reviewed.

• Major determination methods for key transition parameters were introduced.

• Factors influencing key transition parameters were summarized.

• Existing prediction correlations for key transition parameters were compared.

• Future research directions in this field were suggested.

Abstract

The fluidization state in the circulating fluidized bed (CFB) boiler is crucial to its stable and safe operation. However, up to now, the research field has not reached unanimity on whether the fluidization regime that the upper furnace of the boiler operates in is the fast fluidization or pneumatic transport. To this end, this paper reviewed relevant research on the transition between the fast fluidization and pneumatic transport of Geldart group B particles, including the flow characteristics of the fast fluidization, the transition condition between the fast fluidization and pneumatic transport, the determination methods of the transport velocity utr and saturation carrying capacity Gs∗ and the influencing factors on these two parameters. Previous research findings can provide certain guidelines for the design and optimization of the CFB boiler, and result in plenty of prediction correlations for utr and Gs∗. Nonetheless, owing to insufficient data available on Geldart group B particles, especially the ones obtained under high temperature or pressure conditions and in large-scale CFB apparatuses, the existing correlations are not well suited for the prediction of utr and Gs∗ of Geldart group B particles. Thus, further efforts are urgently demanded on the fast fluidization transition of Geldart group B particles.

Graphical abstract

Keywords

Fast fluidization transition; Transport velocity; Saturation carrying capacity; Geldart group B particles; Circulating fluidized bed

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