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Effect of novel intensification structure on drying of particulate materials in spouted beds
Shengning Zhao,Feng Wu,Xiao-Xun Ma,Wenjing Zhou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.114 No.-
Through the hot air-drying experiment, the differences in drying rate, unit energy consumption, and bedpressure drop of the conventional spouted bed (CSB), the spouted bed with an integral swirling bladenozzle (ISBN), the spouted bed with spherical longitudinal vortex generators (LVGs), and the integralmulti-jet spout-fluidized bed (IMJSFB) were studied. The Weibull distribution function was introducedto fit the drying data, and the differences in moisture diffusion coefficient, scale parameters, and dryingactivation energy of the four types of spouted beds were further discussed. The drying performanceparameters of the four types of spouted beds were comprehensively evaluated. The results show that,compared with the CSB, LVGs and IMJSFB reduce the activation energy of the drying process, while theISBN increases the activation energy of the drying process. The IMJSFB shows more excellent performancein terms of drying rate, scale parameters, unit energy consumption, and bed pressure drop, with the highestcomprehensive score. Compared with CSB, ISBN and LVGs, the IMJSFB is more suitable for drying wetparticles. For the IMJSFB, there exists an optimal value of particle diameter (d = 2 mm) for the drying process,which makes the particle drying rate reach maximum.
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