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In various industries, there are often technological processes that are characterized by the release of dust into the working area. This dust is the cause of various diseases of the workers of the enterprise. To maintain the required air parameters in terms of the dust factor in industrial premises, it is necessary to use a complex of systems, including an aspiration system, a centralized vacuum dust removal system and general ventilation. Each of the listed systems will fulfill its specific task, but their efficiency and productivity are interrelated. There are numerous works that consider the operation of systems separately, however, the final concentration of dust in the room, in the end, will depend on their simultaneous operation. The article presents a developed method for calculating the efficiency of a complex of dedusting systems, which will allow at the design stage to assess the concentration of dust in the air of industrial premises and, if necessary, make the necessary adjustments.

Aspiration systems of processing enterprises (local exhaust ventilation) consume a lot of electricity. The article discusses the new energy-efficient design of the aspiration system when using inclined overload gutters. Energy efficiency is the use of the principle of partial recirculation of aspirated air and the Coanda effect when it is fed directly into the transshipment chute. The article discusses in detail the new effective unit for supplying recirculated air to the reloading chute. The use of the proposed design will reduce more than twice the energy consumption of aspiration systems and the energy intensity of general ventilation systems that supply air to the room. The article provides theoretical information on the operation of systems, the results of the experiment.

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Today, the Coanda effect is widely used in many technical areas, in particular, ventilation systems. However, this effect occurs only when a certain combination of many factors affecting the moving stream. The occurrence of the Coanda effect is unstable and is easily disturbed when interacting with another air flow of a non-coincident trajectory. The article describes the method of air supply, which consists in the use of two channels arranged in series in which a stable Coanda effect occurs. The arising effect is explained by the interpretation of the fundamental laws of hydrodynamics. The article presents the results of an experiment on the use of the proposed solution in the recirculation system of aspiration, with the use of which there was an increase in the efficiency of work by 51%

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