Use in Cycle of Biogas Plant Boiler for Waste Disposal

Abstract

This paper presents the results of experiments and calculations of a universal solid fuel boiler that allows one to dispose of waste of hazard class 4–5. A fundamentally new design solution of the furnace chamber and boiler heating surfaces is proposed. A distinctive feature of the proposed design is an inclined sieve that allows the airflow to evenly distribute the burned material in the space of the combustion chamber. As a result of the calculation the optimal shape and size of the sieve were obtained, which allows increasing the efficiency of the combustion process by reducing the time of complete combustion of up to 26%. It is shown that the use of a special screen made of refractory material makes it possible to optimize the directions of movement of the burned material, blast air and combustion products. The heat obtained in the combustion process is used in the cycle of the biogas plant to compensate for the thermal losses of the methanogenesis reactor, which allows ensuring the stability of the plant in the winter period.