Aleksenko B. Improving the technology of regeneration of the adsorption dehumidifiers of compressed air by microwave processing

Object of research - technological process of regeneration of the adsorbent in adsorption dehumidifiers of compressed air, which occurs under the influence of microwave radiation; the goal of research - to improve the technological process of regeneration of the adsorbent in the chamber of the adsorption column of the dehumidifier using the energy of ultra-high frequency (microwave) radiation; methods of research - numerical computer modeling Computer-aided engineering (CAE), using the finite element method, using software products "FlowVisionTM", "AnsysHFSSTM", "COMSOL MultiphysicsTM" and "Simulinc MathlabTM", processing the results of experiments using software packages "Microsoft Office Excel 2007", "Mathlab 7.1" and software of the computer-integrated test bench; the result - the temperature of the adsorbent regeneration process is reduced by 25%, while the consumption of air consumed at the stage of cooling the adsorbent is reduced by 1.4 times; it is shown that the technology of drying the adsorbent by microwave radiation consumes 1.8 times less energy with the same dynamics of the regeneration process in comparison with the usual technology of hot regeneration; regeneration technology is proposed, which requires 50 minutes less time at the stage of cooling the adsorbent from the regeneration temperature of 200 ° C to a temperature of 35 ° C; developed the design of the adsorption column using the phase shift of one of the radiating ports, which prevents overheating of the adsorbent in local areas, and the design provides overall uniformity of temperature distribution in the adsorbent volume and reducing the difference between minimum and maximum temperature by 2.25 times, which has a positive effect on the action of electromagnetic energy in the volume of the adsorbent and contributes to the preservation of its useful properties; it is shown that in the case of using an X-shaped waveguide with an internal dissector of the pin type, the most uniform cyclic redistribution of energy in the arms of the waveguide is observed at relatively small power losses, which are 15% of the total power; novelty - new technological regularities of the adsorbent regeneration process are established; mathematical models of the technological process of drainage taking into account microwave drying were further developed; it is taken into account that moisture transfer is additionally connected with the action of thermodynamic forces and the values of moisture diffusion and magnetic diffusion coefficients in the adsorbent are obtained; regularities of spatial distribution of thermal and electromagnetic fields and conditions for their uniform distribution are received; it was found that due to the action of microwaves there is a decrease in the temperature of the regeneration process by 30 ° C; the occurrence of non-flowing zones in the adsorbent region is excluded, which during 2 hours of heating increases the uniformity of temperature distribution in the volume of the adsorbent by 3.7 times and eliminates the presence of zones of overheating and reduces the mass of air which is required to cool the adsorbent to adsorption temperature by 1.4 times; the use of microwave phase shift technology in time in one of the opposite ports of the waveguide is proposed and the most optimal function of its shifting is established; it is proved that the technology of using an X-shaped waveguide with an internal dissector of the pin type provides the most uniform cyclic redistribution of microwave energy in the adsorption column with minimal losses of reflected power; the degree of implementation - the results are implemented in the production activities of LLC "Technopolis-Mashinobuduvannya" in the implementation of contracts for the supply of equipment to enterprises JSC "Motor-Sich", JSC "Zaporizhstal", SE NKVG "Zorya-Mashproekt" field of application - construction of adsorption dehumidifiers of perspective design.