ZHANG Xindi¹， ZHANG Weiyi¹， LI Zhaoting²， ZHAO Jie¹， LIU Azhen¹， LI Hanyong¹

(1. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology， Beijing 102627， China；2. Beijing Minghui Tianhai Gas Storage Transportation and Sales Co., Ltd.，Beijing 101112， China)

Abstract: In order to use the numerical simulation method of computational particle fluid dynamics (CPFD) instead of the experimental method, a single-tube liquid-solid two-phase fluidized bed experimental system was established.The minimum fluidization velocity of 5 kinds of particles was measured experimentally.The CPFD method was used to simulate the single-tube liquid-solid fluidized bed model. The experimental and simulated values of the minimum fluidization velocity of five kinds of particles were compared, and the error analysis was carried out to verify the correctness of the numerical simulation method.The results show that the minimum fluidization velocity of the five kinds of experimental particles are 0.021 6, 0.036 7, 0.029 3, 0.055 5 and 0.084 5 m/s, respectively.The maximum relative error between the two formulas and the experimental value is less than 10%, and the average relative error is less than 5%, which prove the reliability of the experimental results.The minimum fluidization velocity correction values of the five kinds of simulated particles are 0.024, 0.044, 0.041, 0.069 and 0.062 m/s, respectively.The errors of the minimum fluidization velocity between the simulated correction values of particles S₁, S₂, S₄ and S₅ and the experimental values of particles E₁, E₂, E₄ and E₅ are respectively 11.1%, 19.9%, 24.3% and 26.6%, which are all positive deviations and within the allowable range of engineering, proving that CPFD numerical simulation method is reliable. The minimum fluidization velocity increases with the increase of solid particle density and particle size.

Keywords: computational particle fluid dynamics； numericals imulation； liquid-solid two-phase flow； fluidized bed； the minimum fluidization velocity

Received： 2022-05-06，Revised：2022-11-03，Online：2022-12-02 09:47。

Funding Project:国家自然科学基金项目，编号：51774046。

First Author：张鑫镝(1998—)，男，硕士研究生，研究方向为过程装备的液-固流态化。E-mail: 2021540004@bipt.edu.cn。

Corresponding Author：张卫义(1963—)，男，副教授，硕士，硕士生导师，研究方向为过程装备的液-固流态化。E-mail: zhangweiyi@bipt.edu.cn。