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Effect of the distributor plugging ways on fluidization quality and particle stratification in air dense medium fluidized bed

引用

International Journal of Mining Science and Technology 2020年第6期30卷 883-888页

作者： Zhonglin Gao Xuesen Chai Enhui Zhou Ying Jia Chenlong Duan Ligang Tang Key Laboratory Coal Processing and Efficient Utilization of Ministry of Education School of Chemical Engineering and TechnologyChina University of Mining and TechnologyXuzhou 221116China School of Environment Engineering North China Institute of Science and TechnologySanhe 065201China

Gas-solid fluidized bed separation is a highly efficient and clean technique for coal separation,and can effectively remove ash and sulfur contained gangue minerals from ***,the fine coal plugging distributor often leads to uneven fluidization and affects the separation *** this paper,different plugging ways were designed to study their effects on the fluidization characteristics and particle *** was found that when the plugging phenomenon occurs,the minimum fluidization velocity of the fluidized bed gradually decreases as the plugging area *** difference between the top and the bottom of the bed minimum fluidization velocity increases accordingly,and a“stagnation phenomenon”occurs in the *** standard deviation of pressure fluctuations at the top of the bed is smaller than that at the bottom of the bed,which is the opposite of normal *** the area of the plugging increases,the dead zone on the side wall of the fluidized bed significantly *** size of the dead zone is rapid reducing at the initial *** was noticed that the stratification of the low-density products is particularly affected by plugging,whereas the stratification of high-density products is not obviously influenced by certain conditions.

关键词： dry separation Distributor Plugging Particle mixing

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