IMPROVING THE DESIGN OF CAP-TYPE PLATE FOR RECTIFICATION COLUMNS
For the purpose of oil refining industry development search of the solutions which are support increase of heat and mass transfer processes intensity entailing need of continuous main equipment improvement, in particular - column devices. Along with the common methods of heat and mass transfer processes intensification (increasing phase contact surface area, increasing the mixing efficiency, increasing the flows speed, improving the phase contact methods, etc.), an effective way to solve this problem is the use of non-stationary interfacial exchange modes, ensuring the achievement of heat high instantaneous values and mass transfer coefficients. To obtain non-stationary modes in the experiments which are described in this article, the energy discrete-pulse input principle on the processed substances is used, which consists in the fact that the energy injected into the system is concentrated in locally separated discrete points of the system.Contact devices are the main elements that affect the efficiency of mass transfer column-type apparatus. So the application of the energy discrete-pulse input principle is advisable to implement locally on contact devices.There are many designs of contact devices, classified according to different attributes, with different performance characteristics. This article presents the design of the cap-type mass transfer plate, a feature of which is the use of thermoelectric converters based on the Peltier effect, allowing to introduce energy into discrete points of the system in the form of additional heating of the liquid phase and simultaneous cooling of the vapor phase, that is the representation of non-stationary mode in the temperature profile in the studied system. The design description of the developed contact device, as well as studies aimed at determining the optimal location of thermoelectric converters, performed by using carried experiment thermal imaging, measuring the thermal impact zones size. The design allows for additional heating of the plate side being in contact directly with the liquid phase of the studied liquid, as well as additional cooling of the plate side being in contact with the gas phase. The additional heating and cooling area relative to the free plate sheet according to calculations was 74.0 % and 47.8 %, respectively.