| 喷动床中气体停留时间分布的研究 |
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| 引用本文： | 孙淑兰,鲍晓军,魏伟胜. 喷动床中气体停留时间分布的研究[J]. 中国化学工程学报, 2005, 13(3): 291-296 |
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| 作者姓名： | 孙淑兰 鲍晓军 魏伟胜 |
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| 作者单位： | The Key Laboratory of CatalysisChina National Petroleum Co.，China University of Petroleum，Beijing 102249，China，The Key Laboratory of CatalysisChina National Petroleum Co.，China University of Petroleum，Beijing 102249，China，The Key Laboratory of CatalysisChina National Petroleum Co.，China University of Petroleum，Beijing 102249，China |
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| 基金项目： | 国家自然科学基金，the Ministry of Education of China through the Doctorate Discipline Foundation |
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| 摘 要： | In a spouted bed of 80mm in ID and 1700mm in height, the gas residence time distributions at different radial positions in both spout and annular area were measured with five different kinds of particles as spouting material, air as spouting gas, and hydrogen as tracer. The effects of superficial gas velocity, operating pressure, particle size and its category on gas residence time distribution were discussed. It was found that the gas velocity profile in spout was more uniform than that in annulus. It could be concluded that the gas flow in the spout could be treated as a plug-flow, while that in the annulus inhibited a strong non-ideal flow behavior. Increasing the superficial gas velocity and decreasing the operating pressure, the particle density and its size gave rise to spouting disturbance, thus the measured tracer concentrations vs. time curves fluctuated. The variances of residence time distribution curves could be taken as a measure of the gas fluctuation degree.
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| 关 键 词： | 天然气 时间分布 喷泉床 RTDs 固相催化 |
| 修稿时间： | |
Gas Residence Time Distributions in a Spouted Bed |
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| SUN Shulan,BAO Xiaojun,WEI Weisheng. Gas Residence Time Distributions in a Spouted Bed[J]. Chinese Journal of Chemical Engineering, 2005, 13(3): 291-296 |
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| Authors: | SUN Shulan BAO Xiaojun WEI Weisheng |
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| Affiliation: | The Key Laboratory of Catalysis, China National Petroleum Co., China University of Petroleum, Beijing 102249,China;The Key Laboratory of Catalysis, China National Petroleum Co., China University of Petroleum, Beijing 102249,China;The Key Laboratory of Catalysis, China National Petroleum Co., China University of Petroleum, Beijing 102249,China |
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| Abstract: | In a spouted bed of 80mm in ID and 1700mm in height, the gas residence time distributions at different radial positions in both spout and annular area were measured with five different kinds of particles as spouting material, air as spouting gas, and hydrogen as tracer. The effects of superficial gas velocity, operating pressure, particle size and its category on gas residence time distribution were discussed. It was found that the gas velocity profile in spout was more uniform than that in annulus. It could be concluded that the gas flow in the spout could be treated as a plug-flow, while that in the annulus inhibited a strong non-ideal flow behavior. Increasing the superficial gas velocity and decreasing the operating pressure, the particle density and its size gave rise to spouting disturbance, thus the measured tracer concentrations vs. time curves fluctuated. The variances of residence time distribution curves could be taken as a measure of the gas fluctuation degree. |
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| Keywords: | residence time distribution spouted bed |
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