As a type of airtight conveying mode, pneumatic conveying has the advantages of environmental friendliness and conveying without dust overflow. The application of the pneumatic conveying system in the field of coal particle conveying can avoid direct contact between coal particles and the atmosphere, which helps to reduce the concentration of air dust and improve environmental quality in coal production and coal consumption enterprises. In order to predict pressure drop in the pipe during the horizontal pneumatic conveying of large coal particles, the Lagrangian coupling method and DPM (discrete particle model) simulation model was used in this paper. Based on the comparison of the experimental results, the feasibility of the simulation was verified and the pressure drop in the pipe was simulated. The simulation results show that when the flow velocity is small, the simulation results of the DPM model are quite different from that of the experiment. When the flow velocity is large, the large particle horizontal pneumatic conveying behavior predicted by the model is feasible, which can provide a simulation reference for the design of the coal pneumatic conveying system.

中文翻译：

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大煤粉水平气力输送的压降研究

气动输送作为一种气密输送方式，具有环境友好，输送无粉尘溢出的优点。气力输送系统在煤粉输送领域的应用，可以避免煤粉与大气直接接触，有利于降低煤炭生产和煤炭消费企业的空气尘埃浓度，提高环境质量。为了预测大颗粒煤在水平气动输送过程中管道的压降，本文采用拉格朗日耦合法和DPM（离散颗粒模型）模拟模型。在比较实验结果的基础上，验证了模拟的可行性，并对管道中的压降进行了模拟。仿真结果表明，当流速较小时，DPM模型的仿真结果与实验结果完全不同。当流速较大时，该模型预测的大颗粒水平气力输送行为是可行的，可为煤气输送系统的设计提供仿真参考。