Evaluation of dust emissions from conveyor transfer chutes using experimental and CFD simulation

Computational Fluid Dynamics (CFD) modelling of transfer chutes: Assessment of viscosity, drag and turbulence models

“…The outlet air velocity distributions and air mass flow rates were used to rank chute performance regarding likely dust emission. Thus simulation results of both the air velocity distributions and air mass flow rates obtained from different chute configurations were compared with the experimental results previously undertaken by the authors (Chen et al, 2012). According to the experimental results, the performance of Chutes A, B and C are similar, while the results clearly indicate that Chute D dramatically reduced dust emission by approximately 30% due to the application of a restrictor plate.…”

“…The CFD method has been proven to be able to successfully model complex multiphase flows, such as circulating fluidized beds, pneumatic transport and spouted beds (Huber and Sommerfeld, 1998;Yang et al, 2003;Duarte et al, 2009;Hartge et al, 2009). Previous studies by the authors indicate that two-phase CFD simulations correlate well with experimental scale model transfer chute tests (Chen et al, 2012;Goniva et al, 2012), indicating that this approach can be used to effectively predict likely dust emissions. The success of the Two Fluid Model (TFM) depends on the appropriate selection of models and modelling parameters.…”

On the analysis of a coarse particle free falling material stream

“…These parameters are categorized under the 'passive' dust control topic in which no external energy sources are used. Passive dust control techniques have received substantial attention as either a complementary option to improve the efficiency of active systems or to be used as a viable alternative Chen et al, 2012). There is limited published research on the diameter of a falling stream.…”

Estudo Da Aplicação Da Técnica De Supressão De Pó Nas Emissões Secundárias De Material Particulado Total Da Planta De Sinterização Da Arcelormittal Tubarão

“…Na sinterização, os pontos de transferência de material de uma correia transportadora para outra, denominados de chutes de transferência, são as áreas que merecem atenção no que diz respeito à questão ambiental associada ao manuseio de matérias-primas. Estes são pontos críticos de emissão fugitiva associada a esse tipo de transporte cuja melhor prática de controle é promover o uso de dispositivos de coleta e tratamento de material particulado (instalação de coifas de captação nas transferências, ligadas a um sistema de despoeiramento, geralmente um precipitador eletrostático ou filtro de mangas) [4][5][6]. No entanto, outra técnica para controlar as emissões de fontes extensas que pode complementar e/ou substituir o uso de um sistema de ventilação local exaustora, é o uso de sprays de água com ou sem produtos químicos.…”