Experimental investigation on the agglomeration performance of pre-charged micro-nano particles in uniform magnetic field

Abstract

Agglomeration of fine particles is an essential procedure to improve separation efficiency of dust-removal devices. This paper focuses on the treatment of biomass Micro-Nano particles using cascade electrostatic and magnetic fields. A carefully designed wind tunnel is built to investigate the agglomeration performance of pre-charged Micron-Nano particles (0.016–9.84 µm) in uniform magnetic field. The influence of supply voltage (10–30 kV) in the electrostatic unit and the bulk flow velocity (1–5 m/s) across the device upon agglomeration is studied. The results indicated noticeable agglomeration behavior because of reduced submicron particles and increased larger particles. Strengthening Supply voltage input has a positive yet minimum effect on the overall agglomeration efficiency. Effect of bulk flow velocity on agglomeration is remarkable due to magnetic field. Therefore, agglomeration of pre-charged particles in uniform magnetic field is dominated by Lorentz effect and stream-wise spacing of the device. This work provides a reference for further computational attempt in the future.