Characteristics of magnetization on spray dust removal performance for carbon fiber dust

Abstract

This study experimentally investigates the efficacy of magnetized water in removing carbon fibre dust. Environmental Scanning Electron Microscopy (ESEM) was initially utilized to observe the nucleation behaviour of carbon fibre dust within a water vapour environment. Subsequently, an integrated spray dust removal test bench was constructed to assess the effects of three critical factors on dust removal efficiency: water treatment methods (ordinary water vs. magnetized water), configurations of nozzle rows (1–3 rows) and air velocity (0.5–3 m/s). The findings indicated that magnetized water could significantly enhance dust removal efficiency for carbon fibre dust particles sized between 0.3 and 10 μm compared to ordinary water, achieving an efficiency improvement of 16% for particles of 0.3 μm and 20% for particles of 10 μm. The number of nozzle rows could affect the dust removal efficiency of both water types. With ordinary water, efficiency was shown to increase with the number of nozzle rows. However, magnetized water reached its optimal efficiency with two nozzle rows. Additionally, air velocity was inversely related to dust removal efficiency: at an air velocity of 0.5 m/s, the average dust removal efficiency was 83%, which was 7% higher than that of 3 m/s.