Development and numerical modeling of the column structure for gas - liquid contact

The design of a column for contacting gas or vapor with a liquid has been developed, which allows increasing productivity by improving the surface of contact between phases. Previously known and recently developed designs of mass transfer columns do not meet the requirements for achieving the required technical result. This is due to the small area of creation of the phase contact surface, which leads to insufficient mass transfer on the surface of the liquid layer formed between the elements of the column trays, which reduces productivity. Therefore, it is proposed to carry out an axisymmetric annular multi-row installation of S-shaped elements with a vertical partition around the circumference with the same gap between adjacent rings, which will increase the surface area of the phase contact between the flowing liquid and the rising gas (vapor), and will contribute to the intensification of heat and mass transfer processes , will increase performance. To confirm the claimed technical result, comparative calculations were carried out on a computer according to the developed program, with known designs of plates with tunnel caps of the TST type for column apparatus with a diameter of (400-3000 mm). The design of the contacting column developed and the previously known standard bubble cap trays were simulated. Numerical modeling showed that the installation of S-shaped elements with vertical partitions around the circumference, axisymmetrically with the same gap between adjacent rings, in the gaps between which the overflow devices, which are tubes with a spray device, are evenly located, make it possible to increase the surface area of the phase contact between the flowing liquid and rising steam by 65%, and also allows to provide an increased rate of heat and mass transfer on the tray.

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