混合粒径颗粒物对切割器评价结果的影响研究

依据标准选用8个不同粒径的标准聚苯乙烯小球分别进行PM_2.5切割器的评价，检测周期长、流程复杂。采用多种粒径粒子进行混匀后雾化，形成多分散气溶胶再进行检测，可一次性获取切割器在几种粒径下的捕集效率。用两种方法评价比对了国内外两种切割器，结果表明D_a50及几何标准偏差δ_g一致性较好，偏差不超过3%,但混合方法的测量时间较传统方法缩短了80%。研究成果为优化切割器评价流程提供了参考。

Study on the Influence of Mixed Size Particle on the Evaluation Result of Cutter

The performance evaluation of the cutter can be carried out according to the national standards, but the measurement of capture efficiency using 8 kinds of monodisperse particles with particle sizes is time-consuming and the process is complicated. To solve the aboved problem, the influence of mixed particle size on the evaluation of the cutter was studied. By mixing and atomizing the monodisperse particles with different particle sizes, the efficiency of the cutter under several particle sizes could be obtained at one time. By applying the mentioned method and the traditional method to the evaluation of domestic and imported cutters, and comparing the evaluation results, it can be seen that Da50 and the geometric standard deviation δg have good consistency, with the deviation not exceeding 3%, and the measurement time of the mentioned method is 80% shorter than that of the traditional method. The results of the study provide a reference for optimizing the evaluation process of cutter.