| 摘要 |
PROBLEM TO BE SOLVED: To improve power generation efficiency by effectively utilizing exhaust heat generated in drying low grade coal.SOLUTION: This low grade coal drying system includes: a low grade coal drying device 102 drying the low grade coal 101 indirectly with latent heat of superheated steam A; a binary cycle 120 generating power by operating a steam turbine 124 by a circulating low boiling point heat medium 121; a preheater 128 provided in a process of circulating the heat medium 121, and preheating the heat medium 121 by indirect heat exchange with generated steam 104 generated from the low grade coal 101 by drying; an evaporator 127 provided in the process of circulating the heat medium 121, and vaporizing the heat medium 121 that has passed through the preheater 128, by indirect heat exchange with the generated steam 104; and a superheater 129 provided in the process of circulating the heat medium 121, and superheating the heat medium 121 that has passed through the evaporator 127, by indirect heat exchange with condensed water B produced by condensation of the superheated steam A that has dried the low grade coal 101. |
