基于滤膜称重法含挥发性颗粒物浓度检测实验研究

Research of volatile particulate concentration detection device based on membrane weighing method

针对含挥发性颗粒物对人类和环境的严重危害,提出了一种含挥发性颗粒物浓度检测装置检测其浓度,为便于在人员密集领域对挥发性颗粒物浓度进行检测,基于滤膜称重法检测挥发颗粒物浓度。设计正交实验检测浓度,分析最显著的影响因素,在正交实验的基础上设计定量实验,分析含挥发性颗粒物浓度检测装置的浓度检测效果,并采用幂函数拟合算法对该装置的检测值进行补偿,提升浓度检测结果的精度。结果表明:该装置最显著的影响因素是采样时间为5min、制热温度为40℃、冷凝温度为15℃,挥发性颗粒物的采集率在60%~80%之间,总采集率为80.21%~90.79%。

In view of the harm of volatile particulate matter to human and the environment, the article presents the concentration ofvolatile particulate matter in the field of personnel and its laboratory research. The automatic control technology of volatile particlesis designed based on the thermal desorption weighing method. The most significant influencing factors is analyzed in orthogonalexperiment. On the basis of orthogonal experiment, the quantitative experiment was designed to analyze the effect of volatileparticulate concentration device and power function fitting algorithm is compensated the detection value of the device to improvethe accuracy of detection results. The results show that the most significant influencing factor is sampling time 5 min, heatingtemperature 40 ℃, condensation temperature 15℃, evaporation rate from 60% to 80% and total collection rate from 80.21% to90.79%.