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A study of spray granulation in vibrated fluidized bed with internal heating tubes |
Xiaoheng PAN1, Shichao YE1( ), Zeguang ZHANG1, Li ZHANG1, Xuejun ZHU2 |
| 1. School of Chemical Engineering, Sichuan University, Chengdu 610065, China; 2. College of Biology and Chemical Engineering, Panzhihua University, Panzhihua 617000, China |
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Abstract The granulation process in a vibrated fluidized bed with immersed horizontal heating tubes was studied in this paper, with small monoammonium phosphate particles as the initial particles and monoammonium phosphate solution sprayed on them. The concrete influences on the granulating performance of the immersed horizontal heating power, fluidizing gas velocity, vibration frequency and amplitude had been analyzed theoretically. The results show that appropriate vibration intensity is a preferred condition for the growth of partials, but the fine dust will become much more along with prolonged vibration. Increasing the heating power is beneficial to raise the growth rate. Particles will grow faster if the fluidizing gas velocity is higher, but this will cause more fine dust. The optimized condition of A=0.002 m, f=6.67 Hz, u=1.4 m/s was given after the analysis of the experimental results. In the end, a semiempirical formula was derived from the experiment data, and the calculation results show good agreement with the experimental data.
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| Keywords
vibrated fluidized bed
immersed horizontal
horizontal heating tubes
spray granulation
particle growth model
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Corresponding Author(s):
YE Shichao,Email:panxhkf@yahoo.cn
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Issue Date: 05 March 2009
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| 1 |
Wu H L. A study of the fluidized-bed spray granulation progress. Dissertation for the Doctoral Degree . Tianjin: Tianjin University, 1997, 13–25 (in Chinese)
|
| 2 |
Diego B, Giorgio D. The effect of mechanical vibration on gas fluidization of a fine aeratable powder. Chemical Engineering Research and Design , 2008, 86: 359–369
doi: 10.1016/j.cherd.2007.10.002
|
| 3 |
Gupta R, Mujumdar A S. Aerodynamics of vibrated fluid bed. The can J of Chem Eng , 1980, 58: 332–338
|
| 4 |
Chen J P, Wang Z W, Jin Y. Vibro-fluidization of different type particles. Journal of Chemical Engineering of Chinese Universities , 1995, 9(4): 352–357 (in Chinese)
|
| 5 |
Jin H B, Zhang J Y, Zhang B J. Study on hydrodynamics of vibrated fluidized beds. Coal Conversion(China) , 1996, 19(4): 43–49 (in Chinese)
|
| 6 |
Yu S H, Ma B J. A study on the fluid mechanics of vibro-flidied bed. Chemical Engineering(China) , 1995, 23(6): 51–55 (in Chinese)
|
| 7 |
Eulesz K, Ormos Z. Experimental studies on the vibro-fluidization granulation process. Proc4th Conroe Applied Chemistry, Unit Operation and Processes , 1983, 236–240
|
| 8 |
Gupta R. Aerodynamic and drying characteristics of a vibrated fluidized bed. Dissertation for the Doctoral Degree . Montreal: McGill University, 1979, 141–150
|
| 9 |
Kim S W, Ahn J Y, Kim S D, Hyun LeeD . Heat transfer and bubble characteristics in a fluidized bed with immersed horizontal tube bundle. International Journal of Heat Transfer , 2003, 46: 399–409
doi: 10.1016/S0017-9310(02)00296-X
|
| 10 |
Ye S C. Heat transfer character between horizontal tubes in a fluidized bed. Dissertation for the Doctoral Degree . Chengdu: Sichuan University, 2000, 37–41 (in Chinese)
|
| 11 |
Mujumdar A S, Pakowski Z. Effect of vibration on immersed surface heat transfer in a fluidized bed. In: Thermal Engineering Joint Conference Proceedings . Honolulu, HI, USA, 1983, 379–385
|
| 12 |
Zhu X J. Heat transfer and application of vibrated fluidized bed with immersed horizontal tubes. Dissertation for the Doctoral Degree . Chengdu: Sichuan University, 2008, 65–70 (in Chinese)
|
| 13 |
Nienow A W. Fluidizd bed granulation and ceoating: application to materials, agriculture and biotechnology. Chem Eng Comm , 1995, 139: 233–253
doi: 10.1080/00986449508936406
|
| 14 |
Cheng F. Granulation process in a vibrated fluidized bed spray granulator. Dissertation for the Doctoral Degree . Chengdu: Sichuan University, 2003, 44–51 (in Chinese)
|
| 15 |
Tian Z J, Wang X J. Experiments on surface layering model of particles during the fluidized bed granulation with spray. Chemical Industry and Engineering , 2005, 5: 105–108 (in Chinese)
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