| 循环流化床的沸腾传热 |
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| 引用本文： | 张利斌,李修伦. 循环流化床的沸腾传热[J]. 中国化学工程学报, 2001, 9(3): 235-241 |
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| 作者姓名： | 张利斌 李修伦 |
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| 作者单位： | [1]DepartmentofchemicalEngineering,TsinghuaUniversity,Beijing100084China [2]SchoolofChemicalEngineering,TianjinUniversity,Tianjin300072,China |
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| 摘 要： | A model is proposed to predict boiling heat transfer coefficient in a three-phase circulating fluidized bed (CFB), which is a new type of evaporation boiling means for enhancing heat transfer and preventing fouling. To verify the model, experiments are conducted in a stainless steel column with 39 mm ID and 2.0 m height, in which the heat transfer coefficient is measured for different superficial velocities, steam pressures, particle concentrations and materials of particle. As the steam pressure and particle concentrations increase, the heat transfer coefficient in the bed increases. The heat transfer coefficient increases with the liquid velocity but it exhibits a local minimum.The heat transfer coefficient is correlated with cluster renewed model and two-mechanism method. The prediction of the model is in good agreement with experimental data.
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| 关 键 词： | 循环流化床 沸腾传热 三相流 蒸汽压 传热系数 |
| 修稿时间： | |
Boiling Heat Transfer in Circulating Fluidized Beds |
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| Zhang Libin,LI Xiulun. Boiling Heat Transfer in Circulating Fluidized Beds[J]. Chinese Journal of Chemical Engineering, 2001, 9(3): 235-241 |
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| Authors: | Zhang Libin LI Xiulun |
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| Affiliation: | Department of Chemical Engineering, Tsinghua University, Beijing 100084 China School of Chemical Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | A model is proposed to predict boiling heat transfer coefficient in a three-phase circulating fluidized bed (CFB), which is a new type of evaporation boiling means for enhancing heat transfer and preventing fouling. To verify the model, experiments are conducted in a stainless steel column with 39mm ID and 2.0m height, in which the heat transfer coefficient is measured for different superficial velocities, steam pressures, particle concentrations and materials of particle. As the steam pressure and particle concentrations increase, the heat transfer coefficient in the bed increases. The heat transfer coefficient increases with the liquid velocity but it exhibits a local minimum. The heat transfer coefficient is correlated with cluster renewed model and two-mechanism method. The prediction of the model is in good agreement with experimental data. |
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| Keywords: | boiling heat transfer circulating fluidized bed three-phase flow |
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