Korinchuk D. Scientific fundamentals of energy efficient technologies of solid bioand peat fuels production

In the thesis, the scientific and applied problem of increasing the energy efficiency of technologies of bio- and peat fuels production is solved by scientific substantiation of methods for influence on the granulation process from the standpoint of raw materials activation; complex thermal and energy analysis of production stages and development of measures, methods, ways, design and circuit solutions for reducing energy and material expenses and ensuring sustainable production of pressed fuel in the year-round cycle of enterprises. The paper presents mathematical and semi-empirical models of processes used for energy analysis of stages of grinding, high-temperature drying and pressing; methodological bases for research of influence of methods of mechanical, temperature, temperature-humidity, chemical activation and parameters of pressing on formation of molecular communications and molecular crosslinks are developed; diagrams of necessary work for pressing of one-component and composite bio- and peat fuels are developed; as a result of generalization of research results, for the investigated methods of activation the physical and physicochemical models of mechanisms of granulation formation are formulated, which include provisions of the molecular theory of adhesion taking into account the polymeric nature of biomass and peat; energy-efficient pressing modes were determined, which provide reduction of pressing energy consumption by up to 12 times and the highest fuel indicators in terms of density and strength for all investigated types of raw materials; circuit solutions of the grinding stage are substantiated, which ensure up to 40% reduction of energy consumption; designs and operational modes of energy-efficient dryers of aerodynamic and drum type are developed, which ensure reducing energy consumption by 22%; the composition of the section and the modes of humate extraction and chemical activation of peat for integration into the technological cycle of the peat briquette plant are substantiated. Hardware-technological schemes of energy-efficient complexes of biofuel production and complex peat processing into fuel and fertilizer are presented.