МОДЕЛЮВАННЯ ТА АНАЛІЗ ГІДРОДИНАМІКИ ПАРОГАЗОВИХ ПОТОКІВ У СКРУБЕРІ ВЕНТУРІ

The article presents the results of numerical simulation of a Venturi scrubber for purifying contaminated gases from SOx emitted into the atmosphere by marine engines. To model aerodynamics, a solid-state model of a Venturi scrubber was developed. Geometrical parameters and standard models are designed to ensure that they are stowed in clean ship systems. At the first stage, they reached the bottom of the gas stream into the scrubber while feeding the obsolete gas in an amount of 32 m3 /s. On the basis of the obtained model of air flow graphs of velocity and pressure distribution along the axis of the Venturi scrubber were constructed. To determine the rational volume of steam to be fed to the scrubber to ensure a uniform distribution of it on the apparatus, studies of the distribution at different amounts of steam.The study was conducted for three modes of operation of the scrubber, which differ in the amount of saturated steam supplied to the apparatus (1, 5, 10 m3 /s). The simulation results allowed us to analyze the distribution of gas velocities and pressures in the scrubber, the efficiency of spraying and mixing of the gas stream and steam. Based on the analysis of hydrodynamics, the rational mode of operation of the scrubber is determined (steam supply – 10 m3 /s). Further increase in the amount of steam can be considered impractical due to the fact that the gas velocity of the apparatus is greatly increased, which in turn leads to increased resistance of the apparatus and the leakage of dust. The result of the early analysis is the transition to early models of purification systems based on the Venturi scrubber. The developed model can be used as a separate unit in large models of cleaning systems, which include several types of scrubbers for various industries.