PRODUCTION OF SOLID FUEL AND APPARATUS THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a method for producing solid fuel capable of effectively utilizing organic wastes such as sewerage sludge, papermaking sludge and food sludge as fuel and apparatus therefor. SOLUTION: This organic waste is dried up to 20-60% water content in a dryer 3 and granulated by a granulator 6 and carbonized in an air-blocking atmosphere at 300-600 deg.C for 4-20 min in a rotary kiln 9 and then cooled by a cooling apparatus 11 and carried to a cement plant as a cement raw material. A dry distillation gas of a rotary kiln 9 is burned in a dry distillation gas fuel furnace 13 and a part thereof is used as a heat source of the dryer 3 and the remainder is heat-exchanged by a heat exchanger 14. A discharge gas from the dryer 3 and gas heat-exchanged by the heat exchanger 14 is treated by a gas treating facility 23 and then discharged into the air.