Feeding spent coffee ground powders with a non-mechanical L-valve: Experimental analysis and TFM simulation

Autor(es)

Massaro Sousa, L. ^{[1, 2]} ; Ferreira, M. C. ^[2] ; Hou, Q. F. ^[1] ; Yu, A. B. ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Monash Univ, Chem Engn Dept, ARC Res Hub Computat Particle Technol, Clayton, Vic 3800 - Australia

^[2] Univ Fed Sao Carlos, Drying Ctr Pastes Suspens & Seeds, Chem Engn Dept, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[3] Southeast Univ Monash Univ Joint Res Inst, Ctr Simulat & Modelling Particulate Syst, Suzhou 215123 - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: Powder Technology; v. 360, p. 1055-1066, JAN 15 2020.
• Citações Web of Science: 2

Resumo

A better understanding of feeding operations is pressing for value-added processing of waste biomass powders. This paper examines the feeding of Spent Coffee Grounds (SCGs) using a non-mechanical L-valve both experimentally and numerically. L-valve provides stable solids feeding, showing different flow regimes. Powders' height in the standpipe must be monitored to guarantee smooth operations with the valve, and the data for SCGs differ significantly from those reported for glass and sand powders. A new correlation to predict the solids flowrate from simple pressure measurements was proposed for valve operating under high air flowrates. For low to medium air flowrates, a two-fluid model (TFM) was proposed and validated. The SCGs' flowrate in the feeder was accurately predicted by the TFM and the correlation. Furthermore, key information for the design of L-valves was obtained from the TFM simulation. The findings are useful for producing renewable thermal energy and fuels with biomass SCGs. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 18/11031-8 - Estudo sobre o desempenho de válvulas não-mecânicas como alimentadores de pós de biomassa em reatores de leito pneumático circulante: análise via fluidodinâmica computacional (CFD)
• Beneficiário: Lucas Massaro Sousa
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto
• Processo FAPESP: 16/25946-2 - Estudo sobre o desempenho de válvulas não-mecânicas como alimentadores de pós de biomassa em reatores de leito pneumático circulante
• Beneficiário: Lucas Massaro Sousa
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto