| 陶瓷过滤器滤管外瞬态流场 |
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| 引用本文： | 姬忠礼,丁富新,孟祥波,时铭显. 陶瓷过滤器滤管外瞬态流场[J]. 化工学报, 2000, 51(2): 165-168 |
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| 作者姓名： | 姬忠礼 丁富新 孟祥波 时铭显 |
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| 作者单位： | 清华大学化学工程系!北京100084,清华大学化学工程系!北京100084,石油大学机电系!北京100083,石油大学机电系!北京100083 |
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| 基金项目： | 中国科学院资助项目，59676045， |
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| 摘 要： | 在由 3根陶瓷滤管组成的实验装置上 ,利用热线风速仪对脉冲反吹时滤管外瞬态流场进行了测定 ,分析了喷吹压力和脉冲宽度对滤管外流场的影响。结果表明 ,滤管外流场存在严重的气体回流区 ,回流速度峰值数倍于正常过滤气速。随着离开滤管壁面距离的增加 ,喷吹速度和回流速度逐渐减小 .随着喷吹压力的增加 ,反吹速度和回流速度也显著增加 .
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| 关 键 词： | 陶瓷过滤器 脉冲反吹 瞬态流场 滤管 气固分离 |
INSTANTANEOUS VELOCITY OUTSIDE FILTRATION ELEMENT IN CERAMIC FILTER |
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| JiZhongli,DingFuxin,MengXiangbo,ShiMingxian. INSTANTANEOUS VELOCITY OUTSIDE FILTRATION ELEMENT IN CERAMIC FILTER[J]. Journal of Chemical Industry and Engineering(China), 2000, 51(2): 165-168 |
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| Authors: | JiZhongli DingFuxin MengXiangbo ShiMingxian |
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| Abstract: | On a new experimental set-up of filter with three ceramic filter elements, the transient velocity outside the filter element is measured by hot-wire anemometer during pulse-jet cleaning process. The influences of reservoir pressure and pulse duration on instantaneous velocity are investigated. The experimental results show that there exists a remarkable back-flow between the pulse-jet cleaning and normal filtration process. It is shown that the pulse-jet cleaning velocity and back-flow velocity increase with rising reservoir pressure. The back-flow velocity peak is several times of filtration velocity and makes fine particles redeposit on the filter element surface and even penetrate the filter element wall. |
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| Keywords: | ceramic filter pulse-jet cleaning instantaneous velocity back-flow |
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