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	Investigation of wetting and drying process in a gas-solid fluidized bed by electrical capacitance tomography and pressure measurement
	Zhang, J. L.1,2; Mao, M. X.1,2; Ye, J. M.1; Wang, H. G.1; Yang, W. Q.3
刊名	Powder technology
	2016-11-01
卷号	301页码:1148-1158
关键词	Fluidized bed Electrical capacitance tomography Top spraying Gas-solid flow
ISSN号	0032-5910
DOI	10.1016/j.powtec.2016.07.069
通讯作者	Wang, h. g.(wanghaigang@iet.cn)
英文摘要	Top-spray configurations are widely used in pharmaceutical fluidized beds for particle coating and granulation. the process is complex due to the change of particle moisture as well as particle density. it is important to investigate the flow hydrodynamics in the process. in this paper, electrical capacitance tomography (ect) combined with pressure transducers are used to investigate the flow hydrodynamics of gas-solids flow in a top-spray fluidized bed for wetting and drying. the flow characteristics investigated include bubble size, dominant frequency and standard deviation. discrete wavelet transforms (dint) and fast fourier transform (fft) are used to analyze the capacitance and pressure signals. the effects of key process parameters, including superficial velocity, particle size and spraying conduction on the flow hydrodynamics, are analyzed. the result indicates that both the material moisture and particle size influence the minimum fluidized velocity and bubble characteristics during the wetting and drying process. the result also indicates that the moisture content of particles and superficial fluidization velocity are two main factors, which determine the bubble characteristics in the top-spray process. the bubble size presents a complex trend, which is influenced by the spray pressure. the fluctuation frequency of bubbles presents a different trend in the wetting and drying stage. (c) 2016 elsevier b.v. all rights reserved.
WOS关键词	RECURRENCE QUANTIFICATION ANALYSIS ; GROUP-B PARTICLES ; VOIDAGE PROFILES ; WAVELET ANALYSIS ; COATING PROCESS ; DYNAMICS ; CFD ; HYDRODYNAMICS ; RISER ; DEM
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000384785300122
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2375063
专题	中国科学院大学
通讯作者	Wang, H. G.
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Manchester, Sch Elect & Elect Engn, Manchester M13 9PL, Lancs, England
推荐引用方式 GB/T 7714	Zhang, J. L.,Mao, M. X.,Ye, J. M.,et al. Investigation of wetting and drying process in a gas-solid fluidized bed by electrical capacitance tomography and pressure measurement[J]. Powder technology,2016,301:1148-1158.
APA	Zhang, J. L.,Mao, M. X.,Ye, J. M.,Wang, H. G.,&Yang, W. Q..(2016).Investigation of wetting and drying process in a gas-solid fluidized bed by electrical capacitance tomography and pressure measurement.Powder technology,301,1148-1158.
MLA	Zhang, J. L.,et al."Investigation of wetting and drying process in a gas-solid fluidized bed by electrical capacitance tomography and pressure measurement".Powder technology 301(2016):1148-1158.

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