| 摘要 |
PURPOSE:To reduce an energization time and prevent deterioration of performance of combustion during energization of a fine coal powder mill by a method wherein a required time until a fine powder coal mill outlet air temperature is made stable at a predetermined value and a required mill warming time are calculated and it is subtracted from a predetermined full load reaching time. CONSTITUTION:Gas of high temperature, air for example is guided to a fine powder coal mill 16 to perform a heating operation. After a fine powder coal mill outlet air temperature is increased more than a predetermined value, coal is fed and the fine powder coal mill 16 is energized. At this time, a full load reaching time is set in advance in a full load reaching time setting unit 15. A required time in which a mill outlet air temperature after feeding coal is made stable at a predetermined value and a required mill warming time is calculated under a fine powder coal mill simulation model 14. These required times are subtracted from the predetermined full load reaching time by a subtractor 19. An optimum mill warming starting time signal 22 being obtained is inputted to an energization sequence control device 14 and then an energization without any delay in the full load reaching time is carried out. |
