Modeling of the Precipitation Process in a Rotating Packed Bed and Its Experimental Validation

›› 2010, Vol. 18 ›› Issue (2): 249-257.

Modeling of the Precipitation Process in a Rotating Packed Bed and Its Experimental Validation

向阳¹, 文利雄^1,2, 初广文¹, 邵磊^1,2, 肖光庭², 陈建峰^1,2

1. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
2. Key Laboratory for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China

收稿日期:2009-07-14 修回日期:2010-02-10 出版日期:2010-04-28 发布日期:2010-04-28
通讯作者: CHEN Jianfeng,E-mail:chenjf@mail.buct.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(20821004,20325621);Beijing Municipal Commission of Education(JD100100403)

Modeling of the Precipitation Process in a Rotating Packed Bed and Its Experimental Validation

XIANG Yang¹, WEN Lixiong^1,2, CHU Guangwen¹, SHAO Lei^1,2, XIAO Guangting², CHEN Jianfeng^1,2

1. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
2. Key Laboratory for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China

Received:2009-07-14 Revised:2010-02-10 Online:2010-04-28 Published:2010-04-28
Supported by:
Supported by the National Natural Science Foundation of China(20821004,20325621);Beijing Municipal Commission of Education(JD100100403)

摘要/Abstract

摘要： A mixing-precipitation model based on the modified coalescence-redispersion model was presented to describe the flow,mixing,nucleation and growth in a rotating packed bed(RPB).The model was coupled with population balance,mass balance and crystallization kinetics.It predicted well the influence of coalescence prob-ability,which represents the mixing intensity among droplets,on the particle number density,supersaturation and mean particle size of the produced precipitates.The effects of the radial thickness of packing,liquid flow rate and rotating speed on the product particle size were also investigated.The results indicate that the needed radial length of packing is short for sparingly soluble substance precipitation(about 40-50 mm in this work), and the mean parti-cle size of precipitates decreases with the increase of rotating speed and liquid flow rate,respectively.The validity of this model was verified by experiment on BaSO₄ precipitation in RPB.

关键词: rotating packed bed, precipitation, BaSO₄, coalescence-redispersion model, mixing

Abstract: A mixing-precipitation model based on the modified coalescence-redispersion model was presented to describe the flow,mixing,nucleation and growth in a rotating packed bed(RPB).The model was coupled with population balance,mass balance and crystallization kinetics.It predicted well the influence of coalescence prob-ability,which represents the mixing intensity among droplets,on the particle number density,supersaturation and mean particle size of the produced precipitates.The effects of the radial thickness of packing,liquid flow rate and rotating speed on the product particle size were also investigated.The results indicate that the needed radial length of packing is short for sparingly soluble substance precipitation(about 40-50 mm in this work), and the mean parti-cle size of precipitates decreases with the increase of rotating speed and liquid flow rate,respectively.The validity of this model was verified by experiment on BaSO₄ precipitation in RPB.

Key words: rotating packed bed, precipitation, BaSO₄, coalescence-redispersion model, mixing

向阳, 文利雄, 初广文, 邵磊, 肖光庭, 陈建峰. Modeling of the Precipitation Process in a Rotating Packed Bed and Its Experimental Validation[J]. , 2010, 18(2): 249-257.

XIANG Yang, WEN Lixiong, CHU Guangwen, SHAO Lei, XIAO Guangting, CHEN Jianfeng. Modeling of the Precipitation Process in a Rotating Packed Bed and Its Experimental Validation[J]. , 2010, 18(2): 249-257.

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Modeling of the Precipitation Process in a Rotating Packed Bed and Its Experimental Validation

Modeling of the Precipitation Process in a Rotating Packed Bed and Its Experimental Validation

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