抄録
The thermal recycling of waste materials is a vital technology for both the effective utilization of energy and the long-term use of disposal sites. The blended combustion of waste materials in coal-fired power stations is one of the practical and economical means of the thermal recycling. The characteristics of the blended combustion of dried sludge pellets of municipal sewage sludge, produced using the Indirect Multi-Stage Tray Sludge Dryer Pelletier, with bituminous coal are investigated at a pulverized coal combustion test facility (thermal input of fuel: 760kW) in this study. Two combustion tests with bituminous coal and a blend of dried pellets and bituminous coal are carried out. The grindability, unburned carbon concentration in fly ash and NOx concentration in exhaust gas are analyzed. The distributions of temperature and gas composi-tions in the test furnace are also investigated, and compared for these two tests. The results indicate the applicability of the dried sludge pellets in coal-fired power stations from the aspects of the characteristics of combustion and NOx formation.
