| 流化床反应器气固传热面积模型 |
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| 引用本文： | 燕青芝,李灵芝,于丰东,程振民,袁渭康. 流化床反应器气固传热面积模型[J]. 化学反应工程与工艺, 2001, 17(1): 16-20 |
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| 作者姓名： | 燕青芝 李灵芝 于丰东 程振民 袁渭康 |
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| 作者单位： | 1. 平顶山师专化学系,
2. 华东理工大学联合反应工程研究所, |
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| 摘 要： | 研究了流化床反应器内发生气固反应时间的传热机理，认为气固间的传热面积包括两部分，即气泡内所含颗粒的表面积与一气泡和泡晕间的有效传热面积 ，据此首次导出了气固传热面积模型A＝u0-umf/22.26db0.5-umf[4.5unf ρgCpg/db 5.85(λgρgCpg)0.5g^0.25/db^1.25]LmS/a将该模型 应用于半间歇的裂化催化剂烧炭再生过程，与实验数据的比较表明，模型预测是可靠的。
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| 关 键 词： | 流化床反应器 气固传热 面积模型 鼓泡床模型理论 结焦催化剂 再生 传热机理 |
| 文章编号： | 1001-7631（2001）01-0016-05 |
| 修稿时间： | 1999-11-29 |
AREA MODEL OF HEAT TRANSFER BETWEEN GAS AND SOLID IN THE FLUIDIZED BED |
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| YAN Qing-zhi,LI Ling-zhi,YU Feng-dong,CHENG Zhen-min,YUAN Wei-kang. AREA MODEL OF HEAT TRANSFER BETWEEN GAS AND SOLID IN THE FLUIDIZED BED[J]. Chemical Reaction Engineering and Technology, 2001, 17(1): 16-20 |
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| Authors: | YAN Qing-zhi LI Ling-zhi YU Feng-dong CHENG Zhen-min YUAN Wei-kang |
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| Abstract: | According to the detailed analysis of the transient heat transfer mechanism between gas and solid in fluidized bed reactors,it was considered that the area of heat transfer includes two parts:the surface area of solid particles entering the gas bubbles and the heat transfer area between bubble halo and emulsion phase.A area model has been developed as following: A＝uo-umf22.26d0．5b-umfLmSα4.5μmfρgCpgdb＋5.85（λgρgCpg）0．5g0．25d1．25bwhich is applied to the burning-off of carbon deposited in cracking catalyst pellets in a semi-batch fluidized bed reactor.Comparisons of model with experimental data were given.The result showed that the present models can give a good predication of experimental resutlts. |
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| Keywords: | fluidized bed reactor area model heat transfer between gas and solid |
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