Research on Fluidizing of Swirling Transport of Bulk Grain Based on Gas–Solid Coupled Bin Pump

Abstract

To improve the fluidization state of bulk grain in the bin pump in the conveying process, save the time of sending material and improve the conveying efficiency. Add the swirling device at the inlet of the bin pump, and use computational fluid dynamics (CFD) to simulate the key parts of the axial flow pneumatic conveying bulk grain particle system and the bin pump to introduce the swirling technology bin pump. Comparison of the two under the same conditions swirling pneumatic conveying pressure of 0.25MPa, 0.3MPa and 0.35MPa when the material length of 13s, 10s, 8s, respectively, compared with the axial conveying material speed were increased by 18.6%, 28.9%, 20.1%; from the inlet of the lead pipe to the exit of the pressure was reduced by 94.58%, 94.55% and 94.65%; the inlet and the outlet of the pressure were reduced by 94.65%; the inlet and the outlet of the pump were reduced by 94.58% and 94.55%, respectively. 94.65%; the gas-solid two-phase velocity at the inlet and outlet were improved compared with axial pneumatic conveying, in which the gas-phase velocity at the inlet was increased by 81.4% on average, the gas-phase velocity at the outlet was increased by 67.6% on average, the particle velocity at the inlet was increased by 28.9% on average, and the particle velocity at the outlet was increased by 29.2% on average. Through the experiments to compare the two conveying methods, in 0.25MPa, 0.30MPa and 0.35MPa three different pressures under the time used to send material. Swirling pneumatic conveying material speed increased by 19.5%, 30.1%, 23.9%, respectively, the swirling pneumatic conveying material rate is higher than the axial flow pneumatic conveying and the material process is stable.