Fluidization stability and periodic fluctuations in gas-solid separation fluidized bed using Geldart A dense medium

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外文摘要：Gas-solid separation fluidized bed is a typical method for coal separation without water utilization.Geldart A particles is also considered as the ideal dense medium to strengthen separation efficiency.Fluidization stability reflects the bed pressure fluctuations and the distribution of bubble and emulsion phases,affecting the separation performance.And the main frequency of pressure fluctuations can directly reflect the degree of pressure fluctuations.Therefore,the detailed fluidization stability is analyzed combined the method of standard deviation of pressure fluctuations,power spectral density,etc.,for Geldart A particles.The results showed that maintaining an appropriate gas velocity resulted in an average bed pressure of around 2000 Pa.The main frequency is mainly concentrated around 1-1.5 Hz.Finally,a prediction model of the main frequency of pressure fluctuations is established,and the error can be controlled within±0.15.The investigation further proved the stable fluidization of Geldart A particles and provides a method for predicting the main frequency of pressure fluctuations in the gas-solid separation fluidized bed.

外文关键词：

Geldart A dense mediumFluidization stabilityPeriodic fluctuationsPressure fluctuations frequencyGas-solid separation fluidized bed

作者：

Weijin Liu、Dan Wang、Liang Dong、Enhui Zhou、Tatiana Aleksandrova、Chenyang Zhou、Chenlong Duan

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作者单位：

Key Laboratory of Coal Processing and Efficient Utilization(China University of Mining &Technology),Ministry of Education,Xuzhou 221116,China

School of Chemical Engineering & Technology,China University of Mining & Technology,Xuzhou 221116,China

Mineral Processing Department,Saint Petersburg Mining University,St. Petersburg 199106,Russia

Department of Chemical and Biochemical Engineering,The University of Western Ontario,London,Ontario N6A 5B9,Canada

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChina National Funds for Distinguished Young ScientistsPostgraduate Research & Practice Innovation Program of Jiangsu ProvinceGraduate Innovation Program of China University of Mining and Technology

项目编号：

522201050085226113554052125403SJCX23_13022023WLJCRCZL081

出版年：

2024

DOI：

10.1016/j.partic.2024.02.002

颗粒学报(英文版)

中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD

影响因子：0.632

ISSN：1674-2001

年,卷(期)：2024.90(7)