| 摘要 |
PROBLEM TO BE SOLVED: To prevent the clogging of a dust collector while suppressing the abrasion of a blade of a rotary machine in the dust collector in introducing steam generated in drying low-grade coal to the rotary machine.SOLUTION: The low-grade coal drying system includes a low-grade coal dryer 102 for indirectly drying low-grade coat by latent heat of superheated steam A, a compressor 120 as the rotary machine to which the steam 104 generated from the low-grade coal 101 by drying is introduced, the dust collector 105 disposed between the low-grade coal dryer 102 and a place where the generated steam 104 is introduced to the compressor 120 for collecting fine particles included in the generated steam 104, and a pre-dust collection heater 121 disposed between the low-grade coal dryer 102 and a place where the generated steam 104 is introduced to the dust collector 105 for heating the generated steam 104 before reaching the dust collector 105 from the low-grade coal dryer 102 by indirect heat exchange with condensate water B by the condensation of the superheated steam A used in drying the low-grade coal 101. |
