Experimental study on filtration performance of the moving bed granular filter with axial flow--颗粒学报PARTICUOLOGY

Lv, H., Liu, Y., Dong, Y., Fan, Y., & Lu, C. (2023). Experimental study on filtration performance of the moving bed granular filter with axial flow. Particuology, 72, 17-28. https://doi.org/10.1016/j.partic.2022.02.004

Experimental study on filtration performance of the moving bed granular filter with axial flow

Han Lv, Yuxue Liu, Yingying Dong, Yiping Fan ^*, Chunxi Lu ^*

State Key Laboratory of Heavy Oil Processing, Department of Chemical Engineering and Environment, China University of Petroleum, Changping, Beijing 102249, China

10.1016/j.partic.2022.02.004

Volume 72, January 2023, Pages 17-28

Received 7 November 2021, Revised 25 January 2022, Accepted 17 February 2022, Available online 25 February 2022, Version of Record 12 April 2022.

E-mail: fanyipin2022@sina.com; lcx725@sina.com

Highlights

• A new co-current moving bed granular filter with axial flow (MBGF-AF) is proposed.

• Effect of operating conditions on filter is analyzed with interception mechanism.

• Using small particles with big void fraction can obtain a high collection efficiency.

• Deposition of dust contributes to collection efficiency of the MBGF-AF.

• A model is established to predict and evaluate collection efficiency of the MBGF.

Abstract

The filtration performance of the moving bed granular filter with axial flow (MBGF-AF) is investigated through a large cold experiment. The effect of different operation parameters on the filtration performance (collection efficiency, pressure drop) of the axial-flow moving bed filter is investigated in combination with the dust deposition effect and the mechanism of trapping dust by the capturing particles. The results show that the collection efficiency of MBGF-AF is enhanced by decreasing the superficial gas velocity, increasing the inlet dust concentration properly, or decreasing the moving velocity of the capturing particles. A model covering the above operation parameters is established to calculate the collection efficiency of the moving bed granular filter. It is used in a wide range of operating parameters for the MBGFs.

Graphical abstract

Keywords

Moving bed; Granular filter; Specific deposit; Pressure drop; Collection efficiency model

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