METHOD FOR PRODUCING SOLID FUEL AND SOLID FUEL PRODUCED BY THE METHOD

摘要

Modified solid fuel manufacturing method and modified solid fuels manufactured using the manufacturing method. When solid fuels are manufactured by crushing low grade coal, mixing the crushed low grade coal with solvent oil to prepare a slurry, heating the slurry to at least the boiling point of water to evaporate moisture included in the slurry, separating the solvent oil from the slurry to produce charcoal dust and compression compacting said charcoal dust, by heating the slurry to at least the boiling point of water, the non-volatile components included in the low grade coal are extracted with the solvent oil, the outer surface of the low grade coal and the internal surfaces of the pores are coated with the extracted non-volatile components, and the content of heavy oil added from the outside will be less than 0.5 mass %, relative to the solid fuel after drying.

主权项

1. A method for producing a solid fuel, the method comprising:
pulverizing low-rank coal; preparing a slurry by mixing the pulverized low-rank coal with a solvent oil; evaporating water in the slurry by heating the slurry to a boiling point of water or more; producing fine coal by separating the solvent oil from the slurry, while a non-volatile component contained in the low-rank coal is not evaporated by performing solid-liquid separating against the slurry; and briquetting the fine coal, wherein, by heating the slurry to the boiling point of water or more, a nonvolatile component contained in the low-rank coal is extracted with the solvent oil and the extracted nonvolatile component covers an outer surface of the low-rank coal and inner surfaces of pores of the low-rank coal, and a content of a heavy oil added from outside is made 0 mass % with respect to the solid fuel having been dried; and in said solid-liquid separating the weight ratio of dewatered coal, kerosene, and the coal nonvolatile component in the solid phase is 99:33:1.