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Abstract. The development of large cities accompanied by the development of the industry hashistorically led to the fact that now residential areas are located side by side with the industrial production. For instance, exactly this situation has developed in the city of Volgograd, as well as in other Russian cities, where sometimes the distance from large enterprises to a living area is 100 m or less. In addition, small-scale entrepreneurs usually place their production directly in their past places of residence. As a result, the content of harmful substances in the air of city blocks is much higher than the standards of hygiene require. It is obvious that the current situation can be improved through the use of modern, more advanced technologies. However, increasing the efficiency of air systems to protect the city from pollution and industrial emissions is an urgent task. The authors propose a version of the system layout, designed to reduce dust emissions in urban air.

The intensive development of the infrastructure of large cities, which took place in the second half of the twentieth century, led to the fact that enterprises specializing in the production of building materials and products were in close proximity to urban residential areas. This determines an increase in the requirements for the efficiency and reliability of dust removal systems designed, as is known, to ensure the standardized quality of the air environment of settlements and industrial premises. The dust generated in the production of building materials, in many cases, has abrasive properties, which leads to accelerated wear of the elements of dust cleaning systems. The experience of using such systems shows that dust collectors, as well as shaped parts of air ducts (bends, tees, etc.), through which the dust and gas mixture is transported to dust collectors, are most susceptible to abrasion. Abrasive wear of dust collectors during operation leads to an increase in dust leakage into the atmospheric air into the air of the working area. During operation of a dust-cleaning unit under pressure, damage to the walls of the air ducts also leads to knocking out the transported dust. The supercritical wear of the elements of the dust removal system leads to its failure. The article presents some results of studies of the dust properties of building materials that determine the process of abrasive wear.

To protect the atmospheric air from dust pollution in building materials’ production, systems of inertial dust control are most frequently used. The application of swirling inertial dust separators in the counter swirling flows (CSF) enables to considerably enhance the degree of purification of industrial emissions from dust especially from fine particles PM10 and PM2.5. The authors carried out a complex of research works targeted at reasons of technical decisions providing an increase in the efficiency of dust contol systems with the devices of CSF for the construction materials industry. As it was stated by the results of the research, the following decisions belong to the process: suction from the swirling dust separator bunker and supplying the dust and gas flows with various dust content to its top and bottom feeds. The article presents some results of laboratory and pilot studies the objective of which was both the validation of efficiency and practicability in application of the mentioned technical solutions and revealing operation parameters under which the least breakthrough of dust into the air is achieved in the dust control systems composed according to these solutions.