The Process of Dusting the Air during Laboratory Studies of the Effectiveness of Cleaning Devices

Abstract

The article discusses the problem of environmental pollution with dust and the negative impact of particulate matter on human health. As a technical solution to reduce dust emissions, a set of measures is shown to ensure sanitary cleaning of the air flow from dust in laboratory conditions: determining the effectiveness of the cleaning apparatus, the method of dusting the air flow with a standard dust concentrate to ensure a uniform field of dust concentration across the cross-section of the air duct. The results of a study of the process of air dusting by using a flat diaphragm with a round hole of a smaller diameter and ambient air through an annular slot between the plane of the diaphragm and the end of the air duct installed at the inlet of the air duct perpendicular to its axis are presented. This process makes it possible to obtain a uniform concentration field across the cross-section of the air duct and reduce the distance of mixing of the dust concentrate with the air flow in the air duct. A well-founded technical solution to ensure uniform distribution of dust concentrate during laboratory research allows one to increase the accuracy of dust concentration measurements and reliably determine the effectiveness of the cleaning apparatus recommended for production for cleaning process dust emissions.