Study on dump truck dumping process and dust extraction device design

The particle diffusion and movement rules of the dump truck dumping material are simulated in Fluent based on the gas-solid two-phase flow theory. The simulation results show that the dust generation mainly occurs in two stages. One is that when the particle flow is falling, the particle diffusion mainly concentrates on the back of the particle flow. The other is that when particle flow collides with the contact surface, dust diffusion occurs in the area where the collision point is consistent with the outflow direction. According to the simulation results, a dust extraction device for dump truck is proposed to capture dust generated into the atmosphere. The influence of three representative factors: ambient temperature, shape of the dust collection port, fan speed on the performance of the dust extraction device is studied by means of orthogonal experimental design. The results show that the use of plain multiple slot suction port and higher fan speed can improve the dust removal effect and work efficiency of the dust collection device.