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Experimental Investigations into Bubble Characteristics in a Fluidized Bed through Electrostatic Imaging

Qi, Bojian, Yan, Yong, Zhang, Wenbiao, Li, Xinyan (2020) Experimental Investigations into Bubble Characteristics in a Fluidized Bed through Electrostatic Imaging. IEEE Transactions on Instrumentation and Measurement, 70 . Article Number 9503813. ISSN 0018-9456. E-ISSN 1557-9662. (doi:10.1109/TIM.2020.3033760) (KAR id:83513)

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Fluidized beds are widely applied in many industrial processes. In order to control and optimise the operation of a fluidized bed, it is necessary to develop reliable methods for the measurement of bubble characteristics to monitor the status of the bed. Electrostatic sensing methods based on the detection of charges on particles have been applied to characterize the particle motion in a fluidized bed. However, there is limited research on the measurement of bubble characteristics using the electrostatic methods due to complex electrostatic phenomena around the bubbles. In this paper, an imaging method using a two-dimensional electrostatic sensor array is employed for the experimental investigations into the bubble behaviors in a two-dimensional fluidized bed. The bubble size, shape, rising velocity and generation frequency are measured. Moreover, an optical imaging system is employed to obtain reference information to evaluate the performance of the electrostatic imaging method. Experimental results show that the bubble characteristics measured from the electrostatic sensor array have a good agreement with the results from the optical imaging system. The relative root mean square error between the bubble shapes measured from the electrostatic sensor array and from the optical system is 0.239 with a standard deviation within 4.7%.

Item Type: Article
DOI/Identification number: 10.1109/TIM.2020.3033760
Uncontrolled keywords: Fluidized bed; electrostatic imaging; bubble characteristics; electrostatic sensor array; optical imaging system
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA165 Engineering instruments, meters etc. Industrial instrumentation
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Yong Yan
Date Deposited: 16 Oct 2020 15:26 UTC
Last Modified: 09 Mar 2021 12:39 UTC
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Qi, Bojian:
Yan, Yong:
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