Aerodinâmica de leitos vibrofluidizados: uma revisão

Abstract

Aplicações da vibração mecânica com o intuito de facilitar a fluidização e aumentar as transferências de calor, massa e quantidade de movimento são processos comumente utilizados nas agroindústrias, que atualmente encontram suas aplicações no processamento de partículas difíceis de fluidizar. Equações e dados experimentais encontrados na literatura das características aerodinâmicas de leitos vibrofluidizados são apresentados e discutidos, ressaltando o efeito da vibração no leito.

Análise dos parâmetros operacionais do mesocarpo do babaçu em leito fluidizado

“…Given its wide range of uses and importance, studying the fluid dynamic parameters of babassu flour in a gas-particle fluidized bed opens up the possibility of improvements in the production process of this product, seeking to add commercial value to it, as well as improvements in product quality final. The fluidized bed provides an excellent mixing effect between the phases, ultimately offering high rates of heat and mass transfer, as well as uniformity of temperature distribution and phase concentration inside the equipment, this bed is used in drying of particles, coating and granulation of solids (Cheng et al, 2020;Park et al, 2006). The use of gas-solid fluidization is most important because it is a process widely used in the pharmaceutical, food and fertilizer industries.…”

“…The use of gas-solid fluidization is most important because it is a process widely used in the pharmaceutical, food and fertilizer industries. In these processes, the initial characterization of solid particles is vital to define the properties of the product, basically size, shape (sphericity), specific mass and porosity (da Silva Pereira et al, 2022;Formisani et al, 2011;Han et al, 2021;Park et al, 2006;Pusapati & Rao, 2014).…”

“…With increasing velocity, the particles move apart and exhibit a slight vibration, expanding the height of the bed and reflecting an increase in porosity. When the sum of the forces caused by the flow of the gas equals the weight of the particles, the situation reaches what is called a fluidized bed, this change of the fixed bed and the beginning of fluidization represents the minimum fluidization velocity (Umf), an important parameter in the fluidization (Clarke et al, 2005;Costa & da Silva, 2021;Fotovat et al, 2017;Hosseini et al, 2021;Park et al, 2006;Pusapati & Rao, 2014;Taghipour et al, 2005;Wilkinson, 1995).…”