Study on field charged effect of micron-activated droplets and wettability of coal dust

Abstract

Water mist charging and solution active treatment, as two kinds of efficient dust removal methods, showed good dust removal effect when they used independently. In order to explore the settling effect of the combined use of the two on fine dust, sodium dodecyl sulfate (SDS) surfactant was used to prepare the active solution, and copper burr ring electrode was used for corona charging. Under the background of micron droplet field charging, the charging effect of micron active droplet and its wettability to anthracite were investigated. The results show that the active solution is more sensitive to electric field than pure water. Water mist charging and solution activity treatment showed synergistic effects on enhancing droplet fragmentation, reducing droplet size and enhancing solution wettability. Compared with ordinary water mist, micron-charged active water mist has higher capture efficiency for anthracite dust, and sedimentation efficiency for total dust and respirable dust is up to 91.77% and 90.45%.

Keywords

• micron-activated droplet
• field-induced charging
• surfactant
• droplet size
• solution wettability
• dust reduction efficiency