Study on the performance of the dust removal efficiency test device

Abstract

In China, the particulate matter (PM) pollution has caused serious environmental and health concerns, and it is still a huge challenge to control PM pollution. In order to alleviate the hazardous of PM pollution, the dust collector is widely used to separate PM from gas streams. However, after a period of operating, whether the removal efficiency of the dust collector still meet the requirement of the emission limit is unknown. The dust removal efficiency test device was designed and its performance was investigated in this study. The flow field simulation result showed that the test device had a good uniformity, which was consistent with previous measured result. Moreover, it found that the linear relationship between the light scattering concentration and the filtration membrane weighed concentration was y=2.285x, and when the inlet wind speed was about 0.5 m/s, the dust removal efficiency of the dust collector was more than 99.73%, the outlet dust concentration was (0.03-0.04) mg/m3, which was below the emission limit of 15 mg/m3. When the inlet dust concentration was about 200 mg/m3 and the inlet wind speed was (0.25-0.75) m/s, the dust removal efficiency was more than 99.98%. To sum up, the designed test device can be used to estimate the dust removal efficiency of various types of dust collectors.