Due to the peculiarities of the technology, in gypsum production preference is given to dry cleaning of emissions into the atmospheric air from dust. At the same time, dust cleaning systems are arranged in multistage with installation of cyclones at the first stage, bag filters or electric precipitators - at the second. According to the results of research, it was found that the efficiency of cyclones in collecting gypsum dust is 70-75%, precipitators - 97.6-98.5%, and is insufficient neither to ensure sanitary and hygienic conditions, nor to reduce production losses. Based on the results of the studies, the median diameters of dust transported in the engineering and environmental system were determined: after the gypsum boiler - 25-58 microns; after the cooler - 38 μm; after the mill ring - 21 μm; before the electrostatic precipitator - 28 μm. To increase the efficiency of the dust cleaning system, it is proposed to replace the cyclone installed before the electrostatic precipitator with a block of two parallel dust collectors on opposite swirled flows. It has been experimentally established that the effectiveness of such a solution is 88.9-94.9%. Based on the results of studies and statistical processing of the data obtained, it was established. that the main influence on the efficiency of the dust collector unit is exerted by the relative volumetric flow rate in the flow sucked in the lower part of the main VZP apparatus. The highest efficiency values are achieved with its values 0.15-0.22. It was also established that the highest efficiency values are noted in the case when the diameter of the auxiliary VZP device is 2 times smaller than the diameter of the main one. Such mode and design parameters should be recommended for efficient operation of the plant.

Keywords: cyclone, electrostatic precipitator, dust collector at opposite twisted flows, dust collection efficiency, engineering and ecological system