| 超细粉在导向管喷动床中的固体循环速率 |
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| 引用本文： | 周勇,马兰,石炎福.超细粉在导向管喷动床中的固体循环速率[J].化工学报,2004,55(9):1532-1536. |
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| 作者姓名： | 周勇 马兰 石炎福 |
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| 作者单位： | 四川大学化工学院,四川,成都,610065;四川大学化工学院,四川,成都,610065;四川大学化工学院,四川,成都,610065 |
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| 基金项目： | 国家自然科学基金资助项目 (No 2 0 1760 3 1)~~ |
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| 摘 要： | Ultra-fine powders are difficult to be fluidized due to the strong particle to particle cohesiveness.However, the authors‘ experiments showed that the ultra-fine powder CaCO3 could be stably fluidized in a spouted bed with a draft tube. The effects of geometric and operating parameters on solid circulation rate of ultra-fine powder CaCO3 were investigated in a 120 mm diameter transparent semicircular spouted bed with a draft tube. Three draft tubes with different sizes were used in this study. It was found that the solids circulation rate was mainly dependent on the drawing rate of the gas jet from the nozzle, then on the gas transport capacity in the draft tube. With increasing gas feed rate, distance between the nozzle and the draft tube inlet and draft tube diameter, the solids circulation rate could be increased. Based on the jet theory, a quantitative correlation was proposed for predicting the solid circulation rate of ultra-fine powders in a spouted bed with a draft tube by taking into account the gas transport capacity in the draft tube.
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| 关 键 词： | 超细粉 导向管喷动床 固体循环速率 |
| 文章编号： | 0438-1157(2004)09-1532-05 |
| 收稿时间： | 2003-8-11 |
| 修稿时间： | 2003-12-29
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SOLIDS CIRCULATION RATE OF ULTRA-FINE POWDERS IN SPOUTED BED WITH DRAFT TUBE |
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| ZHOU Yong,MA Lan,SHI Yanfu.SOLIDS CIRCULATION RATE OF ULTRA-FINE POWDERS IN SPOUTED BED WITH DRAFT TUBE[J].Journal of Chemical Industry and Engineering(China),2004,55(9):1532-1536. |
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| Authors: | ZHOU Yong MA Lan SHI Yanfu |
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| Abstract: | Ultra-fine powders are difficult to be fluidized due to the strong particle to particle cohesiveness.However,the authors’experiments showed that the ultra-fine powder CaCO3 could be stably fluidized in a spouted bed with a draft tube.The effects of geometric and operating parameters on solid circulation rate of ultra-fine powder CaCO3 were investigated in a 120 mm diameter transparent semicircular spouted bed with a draft tube.Three draft tubes with different sizes were used in this study.It was found that the solids circulation rate was mainly dependent on the drawing rate of the gas jet from the nozzle, then on the gas transport capacity in the draft tube.With increasing gas feed rate, distance between the nozzle and the draft tube inlet and draft tube diameter,the solids circulation rate could be increased.Based on the jet theory,a quantitative correlation was proposed for predicting the solid circulation rate of ultra-fine powders in a spouted bed with a draft tube by taking into account the gas transport capacity in the draft tube. |
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| Keywords: | ultra-fine powders spouted bed with draft tube solid circulation rate |
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