Mathematical modeling of bubble cap trays in rectification processes

The developed design of a bubble cap tray is described, in which the cap is made with the help of a conical spring, which will allow, under the action of an ascending gas flow and a descending liquid flow, to bring it into an oscillatory dynamic mode. This will allow to intensify the process of mass transfer, and therefore will increase productivity. Mathematical modeling of calculation of elasticity and vibration frequency of a conical spring is presented. It is shown that resonant frequencies cause the cap to vibrate with a high amplitude, which intensifies heat and mass transfer processes between liquid and gases (steam), and increases productivity. In addition, the rocking of the caps on the conical spring under the action of the caps of the vapor (gas) phase emerging from the slots also contributes to the destruction of the boundary layer and increases the rate of heat and mass transfer, which additionally contributes to an increase in productivity. An example of the calculation of the above parameters and modeling according to standard and combined models is given: cell, one-parameter diffusion and with a series connection of zones of displacement and mixing. The developed design can be used in the chemical, petrochemical, gas, food, pharmaceutical, energy and other industries, as well as in the ecological processes of separation of solutions and gases in the processes of rectification, absorption, extraction and washing of gases.

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