SOLID FUEL FEEDING METHOD FOR FLUIDIZED BED COMBUSTION DEVICE

• Main Authors: KOUCHIYAMA YASUSHI, HOSODA HIDEO, HIRAMA TOSHIMASA, NISHIZAKI HIROKI
• Format: Patent
• Language: English
• Published: 09.06.1983
• Subjects: AIR; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONSUMING WASTE PRODUCTS BY COMBUSTION; CREMATION FURNACES; FEEDING FUEL TO COMBUSTION APPARATUS; HEATING; LIGHTING; MECHANICAL ENGINEERING; METHODSOR APPARATUS FOR COMBUSTION USING FLUID FUELOR SOLID FUEL SUSPENDED IN; WEAPONS

PURPOSE:To improve an efficiency of combustion and reduce some noxious substances by a method wherein combustibles with a low density and some fine particles such as pyrolysis char etc. are applied as a fuel and it is fed in a diversed condition from the lower part of the fluidized bed and almost all of the combustibles are combustioned in the fluidized bed. CONSTITUTION:The fuel contained in a hopper 1 is fed from a screw feeder 2 to a rotary feeder 3 and then fed into a furnace 6 from a fuel feeding pipe 5 along with fuel feeding air 4. In turn, the combustion air 11 is flowed through the lower wind box 9 in the furnace 6 and suctioned up into the furnace at the dispersion plate 10. Due to the arragement of thermal conducting pipes 7, 8 in the fluidized bed 17 and hollow column part 18, the heat generated in the furnace 6 is efficiently transformed into a superheated steam. Combustion gas is flowed from discharging gas outlet 13 to a cyclone 14, the discharged gas having its dusts separated there is discharged from piping 15 to the part out of the system. In turn, the ash generated in the fluidized bed boiler is discharged out of the over-flow pipe 16 and an other ash generated in the furnace 6 is discharged out from the ash removal pipe 12.