Advances in Materials Science and Engineering / 2020 / Article / Tab 2 / Research Article
Study on the Atomization and Dust-Reduction Performance of a New Type of External Pneumatic Vortex Fog Curtain Dust Removal Device in Fully Mechanized Excavation Face Table 2 Total dust sampling concentration.
Condition Project Measurement point Dwell time (min) Flow (L·min−1 ) Filter weight (mg) Filter weight gain (mg) Net weight (mg) Total dust concentration (mg·m−3 ) Condition 1 1 — — — — — 433.9 Condition 1 2 — — — — — 306.8 Condition 2 (1) 1 2 20 89.8 90.3 0.5 12.5 Condition 2 (1) 2 2 20 88.9 89.2 0.3 7.5 Condition 2 (2) 1 2 20 85.4 85.9 0.5 12.5 Condition 2 (2) 2 2 20 87.3 88 0.7 17.5 Condition 2 (3) 1 2 20 90.1 90.5 0.4 10 Condition 2 (3) 2 2 20 82.3 83.6 1.3 32.5