PROCESS FOR DRYING COAL

摘要

1531564 Drying particulate coal HYDROCARBON RESEARCH Inc 26 Jan 1976 [24 March 1975] 02902/76 Heading F4G In a process for evaporating moisture from particulate coal, e.g. a coal-oil slurry 15, the slurry is heated under such conditions of temperature and pressure as to drive off steam, and the steam is recompressed and employed as the major source of heat. Particulate wet coal is delivered at 10 and hot oil at a temperature such as to ensure a temperature of atleast 250‹ F. for the slurry, at 14. Steam leaves at 16, is recompressed at 26, and passed to a condenser 28 in the slurry, compression being sufficient to ensure a steam condensing temperature at least 5‹ F. above the slurry temperature. Some dried slurry may be recirculated at 23, and extra heating may be provided by a steam jacket 40.