2006, Volume 8, Issue 8
Strategic Study of CAE >> 2006, Volume 8, Issue 8
Enhancement Effect Towards Heat Transfer of Rotary Kiln by Intermittent Contact Between Material and Kiln Wall
1. Department of Machine and Energy Engineering, Shaoyang University, Shaoyang, Hunan 422004, China
2. Key Lab of Railway and Traffic Safety, Central South University, Changsha 410075, China
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Abstract
In rotary kiln cluster moves against kiln wall. According to this feature, transient thermal conductivity of cluster and contact heat transfer coefficient of boundary between cluster and kiln wall are deduced, then heat transfer coefficient between material and covered wall is obtained. Combined with other research harvests, the heat transfer model of rotary kiln is established. The results can be shown as follows ： the temperature of material is lower when the enhancement effect towards heat transfer of rotary kiln by intermittent contact between material and kiln wall has been ignored; the higher the temperature, the greater the influence of enhancement effect on material temperature; it is beneficial to improving the quality of clinker and thermal efficiency of rotary kiln when the enhancement effect has been considered.
Keywords
material ; covered wall ; heat transfer ; enhancement effect
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References
[ 1 ] 严建华, 李水清, 黄景涛, 等.回转窑内MSW轴向传输和扩散的数学模型和仿真[J].工程热物理学报, 2002, 23 (3) :380~383 link1
[ 2 ] Gorog J P, Adams T N, Brimacombe J K.Regenerativeheat transfer in rotary kilns[J].Metallurgical TransactionsB, 1982, 13B (6) :153~163 link1
[ 3 ] Boateng A A, Barr P V.Thermal model for the rotary kilnincluding heat transfer within the bed[J].InternationalJournal of Heat and Mass Transfer, 1996, 39 (10) :2131~2147
[ 4 ] Schlunder E U.Particle heat transfer[A].Proceedings ofthe 7th of the International Heat Transfer Conference[C].Munchen:Hemisphere Publishing Corporation, 1982.195~211
[ 5 ] Basu P, Nag P K.Heat transfer to walls of a circulatingfluidized bed furnace[J].Chemical Engineering Science, 1996, 51 (1) :1~26
[ 6 ] Tscheng S H, Watkinson A P.Convective heat transfer ina rotary kiln[J].Can J Chem Eng, 1979, 57 (6) :433~443
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