颗粒污染源排放浓度和粒径的在线测量技术

大量煤炭的直接燃烧使我国大气呈煤烟型污染,许多城市空气中的总颗粒悬浮物(TSP)指标长期居高不下,不仅影响到人民群众的身体健康,还一定程度上制约了我国国民经济的可持续发展. 近年来,我国政府颁布实施了“污染物排放总量控制”的战略方针,但已有的环保检测方法无法满足这一形势发展的需要. 光散射法无需抽气取样,可以连续地进行在线测量,并直接给出以mg/m3计的烟尘浓度以及颗粒的平均粒径大小,为每个污染源排放总量的测量创造了前提条件.

The measuring technique of mass concentration and particle size in particulate emissions

China is very rich in coal. The direct burning of great amount of coal leads to serious environmental pollution. The control and supervision of particulate emissions are thus one of the most important problems faced now in China in order to improve the air quality and living conditions. The direct and accurate measurement of mass concentration and particle size are concerned in this respect. Several methods have been used for this purpose, but they can not meet all the modern requirements. In this paper, based on the light scattering, a novel method is presented which is able to make on-line, continuous and direct measurement of particulate matters in different industrial emissions. Experimental study was performed. The results of measurements are given and discussed in detail.