System of preliminary treatment of substrates of methantenks in the apparatus of the vortex layer with heat recovery

Abstract

The studying of energy balance for the analysis of thermal processes carried out at the stage of preliminary treatment of substrates is an urgent task. The energy balance is necessary for the subsequent studying the material balance of the developed system with heat recovery and for its energy analysis. The proposed method of substrate pre-treatment in the digester apparatus of the vortex layer allows to increase the biogas yield by 7-10 percent. At the same time, a new source of low-potential energy appears in the form of a heat carrier used for cooling the vortex layer apparatus, which, with the additional use of a heat pump, will reduce energy consumption to maintain the temperature mode of the methane tank. (Research purpose) The research purpose is in creation of technological shape of the system of preliminary treatment of substrate to anaerobic digestion, developing the energy balance of the proposed scheme and determine criteria to evaluate the proposed scheme for post-processing of experimental data. (Materials and methods) Authors used information research methods, including standard analytical methods of modern system approach, processing and analysis. The article presents analytical studies based on the well-known laws of heat engineering and thermodynamics. (Results and discussion) Based on the energy balance of the proposed system, the criteria for evaluating the system of pre-treatment of the substrate for anaerobic digestion with heat recovery of the vortex layer apparatus were determined: ensuring preheating of the initial substrate to the temperature of the anaerobic fermentation process; ensuring the temperature mode of operation of the coil of the vortex layer apparatus; ensuring the energy efficiency of the proposed system. (Conclusions) It was found that the functional dependencies based on the energy balance of the proposed system allow evaluating the effectiveness of this system. It was found that further selection of technological equipment and calculation of the material balance of the proposed system is carried out based on the energy balance.