DEVELOPMENT AND RESEARCH OF THE TECHNOLOGY OF ENRICHING LOW-GRADE SOLID FUELS WITH RECIRCULATING FLUE GASES FOR BOILER PLANTS

One of the steady tendencies in the development of power-engineering systems is the transition to the small-scale distributed power-engineering with active use of local types of biofuel including wastes of local productions, in particular, of wood processing and agricultural profuction (Makarov et al., 2012; Duraeva, 2004; Kovalnogov, 2015). These wastes are processed into fuel pellets (granules or briquettes) usually by shredding them, heat treating (drying), and pressing with or without addition of binding components (Sikkema et al., 2011). In these cases, the drying of raw materials, which is the most power-consuming and long process, considerably determines the quality (grade) and the cost of fuel pellets that can differ considerably. According to the available estimates, the mechanical and chemical incomplete combustion in burning low-grade fuel agropellets (obtained from straw, peelings of grain, DEVELOPMENT AND RESEARCH OF THE TECHNOLOGY OF ENRICHING LOW-GRADE SOLID FUELS WITH RECIRCULATING FLUE GASES FOR BOILER PLANTS