Patent ID: 7628827
Filing Date: 2009-12-08
Classification: C10L

Abstract:
1. An apparatus for producing solid fuel comprising: a mixing tank for mixing an oil mixture containing heavy oil and solvent oil with low-grade coal to prepare a raw material slurry; a first slurry circulating passage for introducing the raw material slurry to the top of the mixing tank from the bottom thereof through a first slurry pump; an evaporator for removing water vapor by heating the raw material slurry introduced from a raw material slurry supply passage, which branches from the first slurry circulating passage; a second slurry circulating passage for introducing the slurry to the top of the evaporator from the bottom thereof through a second slurry pump; a liquid/solid separator for liquid/solid separation of the slurry introduced from a slurry supply passage, which branches from the second slurry circulating passage; and a passage for introducing a supernatant produced by settling of the solid of the slurry in the mixing tank through a third pump into a portion of the first slurry circulating passage between the bottom of the mixing tank and the outlet of the first slurry pump, to wash a portion where the solid deposits.