Abstract：Generally, the commercial cutters have a fixed working flow rate range, if the actual gas flow rate into the cutter is not in this fixed range, deviation of the capture efficiency might be occurred. In this study, by using the cutter capture efficiency evaluation system based on static box method, the capture efficiency for two domestic and imported PM2.5 cutters were evaluated. The influences of the standard working flow of the cutter and the flow of 70%, 80%, 120% and 130% on the trapping efficiency of the PM2.5 cutter were studied. The results showed that with the change of inlet flow rate, the change trend of Da50 is opposite. The distribution range of Da50 is 140% to 80% of the value under standard operating flow. The geometrical standard deviations of the penetrating curve staynearly unchanged, while the change is not more than 0.9% compared with the value under standard operating flow. This study has scientific value for further regulating the manufacture and the usage of cutter.
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2021, Vol. 42 
