文献类型：期刊文献

英文题名：Application of CPFD method in the simulation of vertical dense phase pneumatic conveying of pulverized coal

作者：Jin, Yong[1]; Lu, Haifeng[1]; Guo, Xiaolei[1]; Gong, Xin[1]

机构：[1] Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai, 200237, China

年份：2019

卷号：357

起止页码：343

外文期刊名：Powder Technology

收录：EI(收录号：20193807444632)

语种：英文

外文关键词：Pulverized fuel - Electric impedance tomography - Pneumatics - Drag - Velocity control - Coal - Sensitivity analysis - Two phase flow - Pneumatic conveyors

摘要：Flow stability is a key issue to be addressed by the development of dense phase pneumatic conveying. Flow patterns are closely related to flow stability. From the view of experimental materials, angle of repose, packing density and tapped density and flowability results show that the tested pulverized coal approximated a Geldart's group C powder with strong cohesion. This study contributes with a computational particle fluid dynamic (CPFD) simulation which is based on the numerical solution of continuity and momentum balance equations in a three-dimensional (3-D) horizontal pipeline. A novel correction model was developed, describing interaction among particles and between fluid and particles decided by the experiment mentioned before. The drag force model was done with the parameter sensitivity analysis. The errors of particle velocity profiles and pressure drop predicted by the CPFD approach were below 5% for the stable cases. What's more, the six different flow patterns were predicted by the CPFD approach embedded in the correction model, which was confirmed by electrical capacitance tomography (ECT) in our experimental facility. With the help of our correction model and some suggestions, the CPFD approach may help people to predict dense-phase pneumatic conveying of cohesive powders, such as coal. ? 2019 Elsevier B.V.