INVESTIGATION OF HYDRODYNAMICS OF VALVE PLATES
DOI:
https://doi.org/10.31073/foodresources2020-15-22Keywords:
valve plate, hydrodynamics, resistance, columnAbstract
Column bubble mass exchangers are widely used in chemical, oil refining and related industries for separation or extraction of components from mixtures of liquid (rectification) and gases (absorption). These methods of separation of substances differ in the complexity of the theoretical description, due to the interaction of phases, their hydrodynamic, heat and mass transfer characteristics, as well as the design features of contact devices. To date, the existing variety of theories and approaches to the description of processes occurring in mass exchangers, do not give precise recommendations and dependencies, but require implementation and refinement, taking into account the specific design features of contact devices. This article contains the results of theoretical and experimental studies of contact devices. Valve plates operating in a cyclic mode are the subject of this article. The dimensions of the valves, their weight, lifting height and height of the drain devices were chosen from the operating conditions of the columns, which are equipped with refineries. For the study, 0.5 m diameter plates equipped with ten valves were designed and manufactured. The base of the plate, valves, receiving and draining devices were made of Article 3. The thickness of the plate is – 0.003 m, valves – 0.0015 m. receiving and draining devices – 0.0005 m. The weight of the usual valve is – 0.025 kg, and the cyclic valve is – 0.032 kg. The developed experimental installation made it possible to study the hydraulic modes of valve plates where a characteristic feature of the developed valve plates is the transfer of kinetic energy of air (steam) coming from the space between the neck and the cylindrical surface of the gas valve. is an essential hydraulic characteristic, as the value of this value depends on the conditions that must be created in the column. As a result, data on the operation of valve plates in hydrodynamic, gas-liquid modes were obtained and the resistance of dry valve plates was determined.
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