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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
ADAPTED METHOD FOR DETERMINING THE MINIMAL FLUIDIZATION VELOCITY OF A GAS-SOLID FLUIDIZED BED BY USING AN ELECTRICAL CHARGE SENSOR
Submission Author:
Matheus Ferreira Felix de Andrade , SP
Co-Authors:
Matheus Ferreira Felix de Andrade, Ruan Guilherme Bertoni Pontes, Emerson dos Reis
Presenter: Ruan Guilherme Bertoni Pontes
doi://10.26678/ABCM.ENCIT2020.CIT20-0688
Abstract
The minimum fluidization velocity is an important parameter for controlling the particle fluidization process and for the development of fluidization equipment itself. In this work, an adaptation of the method used by Puncochar et al. (1985) to determine the Umf of a bed of particles has been proposed. In the proposed method, the velocity of the gas surface was represented by a logarithmic scale instead of linear. Also, the modified method of Puncochar et al. (1985) was applied through a new approach, based on the use of non-intrusive electrical charge sensors. The evaluation of the proposed methods occurred through the comparison of the results obtained with the result of the classic method, presented in Kunii and Levenspiel (1991), and through the results obtained by applying the method of Puncochar et al. (1985), in its original form. The results obtained by the proposed methods proved to be promising since the value of the Umf resulting was close to the results obtained by the method used as a basis of comparison. However, the result obtained, even though it was the closest, was 94.4% higher than the minimum value of the fluidization velocity obtained through mathematical modeling of the bed.
Keywords
Fluidized Beds, Electric Charge Sensors, Minimal Fluidization Velocity
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