底隙高度对生物流化床内流场和氧传质特性的影响

董亮; 张毅; 沈桓宇; 李鉴松; 曾涛; 徐银香; 崔亚辉; 赵桐

doi:10.13205/j.hjgc.202306015

底隙高度对生物流化床内流场和氧传质特性的影响

doi: 10.13205/j.hjgc.202306015

董亮^1,2,
张毅²,
沈桓宇²,
李鉴松²,
曾涛^3, ,,
徐银香³,
崔亚辉¹,
赵桐¹

1. 西安理工大学机械与精密仪器工程学院, 西安 710048;
2. 南充职业技术学院机电工程系, 四川南充 637131;
3. 四川轻化工大学机械工程学院, 四川宜宾 644002

基金项目:

南充市科技局项目（19YFZJ0008）；国家自然科学青年基金项目（51808362）；四川省科技创新苗子工程项目（2929131）；成都水生态文明建设研究重点基地项目（2018SST-07）

详细信息

作者简介:
董亮(1987-),男,博士研究生,主要研究方向为机械设计及理论。

通讯作者:
曾涛(1967-),女,博士,教授,主要研究方向为多相流技术及应用。96109721@qq.com

计量
- 文章访问数: 87
- HTML全文浏览量: 11
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2022-06-12
- 网络出版日期: 2023-09-02

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

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

摘要

摘要: 针对生物流化床内构件中底隙高度的设计、优化问题，应用激光粒子图像测速（PIV）和溶解氧在线测试技术，分析了不同曝气强度和底隙高度对生物流化床液相速度、湍动能和氧传质特性的影响。结果表明：底隙高度为75 mm时生物流化床的底部液速和整体液速最大，整体液相湍动能较小。同时，在氧转移系数和转移效率上，有较小的劣势。从结构优化的角度出发，当折流板底隙高度为75 mm时整体效果最好，有利于节约能耗和降低成本。以期为更全面、深入地分析生物流化床其他内构件的协同作用及寻找最佳液相流场和氧传质特性提供参考。
- 生物流化床 /
- PIV /
- 湍动能 /
- 氧转移系数 /
- 氧转移效率
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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