RESEARCH OF HYDRODYNAMIC PARAMETERS OF DUST-TRAPPING DEVICE

Background. Protection of air pool from pollution by industrial emissions is currently one of the major problems affecting in varying degrees all the countries of the world. The issues of gas cleaning are now given great attention, and in-depth practical and theoretical studies are carried out in all industrialized countries, including Uzbekistan. At the same time, it is established that environmental protection issues are closely related to the technical capabilities of treatment devices that must meet the requirements of efficiency, operational reliability, low energy intensity. Purpose. Determination of the optimal hydrodynamic regime and the development of empirical equations for calculating the operating parameters aimed at the development of a dust collector with a movable nozzle for the effective capture of submicron size particles taking into account their different nature of origin, particle size distribution. Methodology. The article uses: statistical methods of processing of experimental data; methods of optimization of technological processes and production; proven conventional methods of experiments to study the laws of hydrodynamics using modern metrologically certified instrumentation and accurate methods of measurement of technological parameters. Originality. The factors affecting the energy costs of the three-phase gas-liquid layer taking into account the design features and hydraulic parameters of the new dust collector are determined and empirical formulas are derived to calculate the gas filling and the amount of retained liquid depending on the energy costs of the ramjet device with a movable nozzle. As a result of researches the effective dust-collecting device for deep cleaning of industrial air of aerosols having on 20-25% lower hydraulic resistance, than devices of similar type is developed. Findings. The support-distribution gratings of the sieve type with a free lattice cross section of 26.0, 34.0, 45.0 and 59.0% were investigated. As a nozzle used rubber nozzle size 20x20 mm with a weight of the nozzle element 30÷40 g. Reduction of the living cross-section of the lattice of the mesh type leads to a significant increase in hydraulic resistance. For example, at a gas velocity of 18 m/s, the hydraulic resistance of the "dry" support grating with a free cross section of 26% is 960 PA, and at a grating cross section of 59% – within 350 Pa. Similar phenomena are also observed at other gas velocities. Highlights: - due to the lack of a reference lattice DР apparatus is reduced; - amount of fluid retained increases with the height of the layer of the annular of nozzle type.