期刊
POWDER TECHNOLOGY
卷 360, 期 -, 页码 577-587出版社
ELSEVIER
DOI: 10.1016/j.powtec.2019.10.071
关键词
Vertical internals; Particle impact pressure; Fluidized bed; Particles flow field; Separation performance
资金
- National Natural Science Foundation of China [51774283, 51904096, 51974306]
- Henan Provincial Department of Science and Technology Research Project [172102310641]
Gas-solid separation fluidized beds are one of the main equipment for the clean utilization of coal resources in China. The vertical internals has a strong influence on the fluidized beds. The combination of Fluent simulation and experimental measurements was used to study the performance of a fluidized bed. The results show that vertical internals can inhibit the formation of larger bubbles evidently at high gas velocity, and divide the original particle circulation flow field into several small cycles, which plays a positive role in promoting the particle mixing, thus, improving the fluidization quality. A fluidized bed with five vertical internals was used to separate 6-50 mm raw coal. The ash content of clean coal is 16.03% with a yield of 43.29%, while the ash content of gangue is 43.60% with a yield of 56.71%. Probable error, E, value is as low as 0.13 g/cm(3), which indicates good separation performance. (C) 2019 Elsevier B.V. All rights reserved.
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