The Effect of Fine Coal Particles on the Performance of Gas–Solid Fluidized Beds
| Autor: | Zhenfu Luo, Hongbo Xing, Chuncheng Liang, Y. M. Zhao, Zengqiang Chen, Longfei Tang |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
business.industry Mechanical Engineering General Chemical Engineering Metallurgy Energy Engineering and Power Technology Separator (oil production) Beneficiation Mineralogy Gas solid Geotechnical Engineering and Engineering Geology complex mixtures Standard deviation Fuel Technology Fluidized bed Coal Fluidization Probable error business |
| Zdroj: | International Journal of Coal Preparation and Utilization. 29:265-278 |
| ISSN: | 1939-2702 1939-2699 |
| DOI: | 10.1080/19392690903411977 |
| Popis: | The distribution of 3 × 1 mm fine coal particles across the fluidized bed was analyzed during beneficiation of coal in a gas–solid fluidized-bed separator. The effect of accumulation of the fine coal on the bed performance was also studied. The experimental results show that as 3 × 1 mm size fine coal content increases in the solid medium the mean density of bed decreases linearly. A mathematical model was developed that can predict the standard deviation of the bed density. The bed density increases sharply as the coal-fines content exceeds 4.5 weight%, at which point the bed becomes unstable and poor fluidization performance takes place. Furthermore, the separation performance of a bed was measured by 50 × 6 mm size tracker balls. The separation performance decreased gradually as the fine coal particles accumulated. When the content of the bed reached 4.5 weight%, the probable error, E, rose from 0.05–0.08 g/cm3. Therefore, to maintain good fluidization and separation performance the 3 × 1 mm fine coal ... |
| Databáze: | OpenAIRE |
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