High moisture solid fuel drying - by heating aq. coal paste at high pressure, decanting and charging directly to gasifier

摘要: Solid fuel with a high content of fixed moisture is dried, after size reduction to under 10 mm, at pressures 15-110 bar and 200-300 degrees C the addition water and/or steam produce paste. This continues until has lost its colloidal structure water, originally later liquid, been eliminated. The dry then fed into gasifier reactor which operated pressure below drying pressure. avoids environmental pollution caused by pressure-less in tube furnaces or hot gases fluidized bed dryers. costs for oil systems using coal/oil paste are saved; heat input required evaporation kept minimum.