The article deals with issues related to the operation of dedusting systems for technological equipment in the production of gypsum and gypsum building materials. The purpose of the research is to identify the features of the layout and operation modes of aspiration systems operated at existing enterprises. Data on the mass of dust determined from the results of measurements entering the working area from individual technological units are given. According to the results of measurements, it was found that from 10% to 20% of the mass of dust released in the technological process enters the working area. Examples of layout solutions for branched aspiration systems serving conveyors, transfer units, crushers of various types are given. It is shown that the reasons for their unsatisfactory work are the lack of aerodynamic linkage and insufficient volumes of removed air. The features of the layout and operating modes of the aspiration system from the gypsum boiler and mill are described. It is shown that individual sections of the system and the system as a whole operate in non-stationary modes, which is due to the variability of the flow rates and dustiness of the moving dust and gas flows.

Keywords: dustiness, dust emission, aspiration system, aerodynamic coupling, flow rate, concentration, dust and gas mixture