Joint combustion at heat power facilities of stone coal and solid fuel compositions based on biofuels

Abstract

It is proposed to use, on the basis of the experience of developed European countries and the United States, the cofiring technology in boilers of small and medium power. A comparison of the prospects for using traditional coal with solid fuel compositions from local types of fuel and organic waste (biomass) is considered. The results of experimental studies on the change in ash content, volatiles yield depending on the amount of biomass in the total balance of solid fuels during their co-combustion are shown. Calculations of the required amount of fuel for combustion in a boiler house with a capacity of 400,000 Gcal / year have been carried out. The high yield of volatiles and the relatively low ash content, as well as the availability compared to coal in terms of supply from the mining site to the consumer, make peat and sawdust a promising fuel for small and medium-sized boiler houses in areas with low gasification. At the same time, peat and sawdust can be used as an additional fuel to the main one, and the main one during monocombustion. In addition, the conversion of boiler houses from coal to peat or sawdust does not always require reconstruction and significant investments, the size of which can be estimated for each specific boiler house, and in some cases such a transfer can be completely non-investment. Peat and sawdust can be considered as an additional resource in solving the problem of finding affordable energy raw materials.