EFFECT OF GAP HEIGHT OF BASE SLOT ON LIQUID FLOW FIELD AND OXYGEN MASS TRANSFER IN A BIOLOGICAL FLUIDIZED BED

DONG Liang; ZHANG Yi; SHEN Huanyu; LI Jiansong; ZENG Tao; XU Yinxiang; CUI Yahui; ZHAO Tong

doi:10.13205/j.hjgc.202306015

Volume 41 Issue 6

Jun. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(6): 109-116

DONG Liang, ZHANG Yi, SHEN Huanyu, LI Jiansong, ZENG Tao, XU Yinxiang, CUI Yahui, ZHAO Tong. EFFECT OF GAP HEIGHT OF BASE SLOT ON LIQUID FLOW FIELD AND OXYGEN MASS TRANSFER IN A BIOLOGICAL FLUIDIZED BED[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 109-116. doi: 10.13205/j.hjgc.202306015

Citation:

DONG Liang, ZHANG Yi, SHEN Huanyu, LI Jiansong, ZENG Tao, XU Yinxiang, CUI Yahui, ZHAO Tong. EFFECT OF GAP HEIGHT OF BASE SLOT ON LIQUID FLOW FIELD AND OXYGEN MASS TRANSFER IN A BIOLOGICAL FLUIDIZED BED[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 109-116. doi: 10.13205/j.hjgc.202306015

Citation:

DONG Liang, ZHANG Yi, SHEN Huanyu, LI Jiansong, ZENG Tao, XU Yinxiang, CUI Yahui, ZHAO Tong. EFFECT OF GAP HEIGHT OF BASE SLOT ON LIQUID FLOW FIELD AND OXYGEN MASS TRANSFER IN A BIOLOGICAL FLUIDIZED BED[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 109-116. doi: 10.13205/j.hjgc.202306015

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EFFECT OF GAP HEIGHT OF BASE SLOT ON LIQUID FLOW FIELD AND OXYGEN MASS TRANSFER IN A BIOLOGICAL FLUIDIZED BED

doi: 10.13205/j.hjgc.202306015

1. School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China;
2. Department of Mechanical and Electrical Engineering, Nanchong Vocational Technology College, Nanchong 637131, China;
3. School of Mechanical Engineering, Sichuan University of Science & Engineering, Yibin 644002, China

Received Date: 2022-06-12
Available Online: 2023-09-02

Abstract

Abstract

Aiming at the design and optimization problem of gap height of base slot in the internal components of the biofluidized bed, the effects of different aeration intensities and different gap heights on liquid phase velocity, turbulent kinetic energy and oxygen mass transfer characteristics of biofluidized beds were analyzed by applying laser particle image velocity (PIV) and dissolved oxygen online testing techniques. The result showed that the bottom liquid velocity and the overall liquid velocity of the fluidized bed were maximum when the gap height was 75 mm, and the overall liquid phase turbulent kinetic energy was relatively smaller. Morever, there were small disadvantages in oxygen mass transfer coefficient and mass transfer efficiency. From the perspective of structural optimization, the overall effect was the best when the baffle had a low clearance height of 75 mm, which was conducive to saving energy consumption and reducing cost. In addition, the optimal liquid phase flow field and oxygen mass transfer characteristics, and a more comprehensive and in-depth analysis of the synergy of other internal components of the biological fluidized bed were still required.
- biofluidized bed,
- PIV,
- turbulence kinetic,
- oxygen transfer coefficient,
- oxygen transfer efficiency

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References

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