| 摘要 |
<p>PROBLEM TO BE SOLVED: To make it possible to eliminate the need for intricate control, to prevent the occurrence of an undesirable condition in the motor accessories of circulating pumps by the occurrence of more than needed changes of the number of running units of the circulating pumps and the repetition of the start and stop of the circulating pumps and to operate the stable number of units of the circulating pumps. SOLUTION: This control method consists in determining the number of the running units of the circulating pumps meeting the kinds of the coal to be used in function generators 36a, 36b,...36n in accordance with the signal 35 for the number of mill starting units outputted from a boiler controller 32 and outputting signals 37a, 37b,...37n for the number of the running units of the circulating pumps to a transfer relay 38. The output signal for the number of the running units of the circulating pumps to be outputted from the transfer relay 38 is determined by a changeover signal 39 outputted according to the kinds of the coal to be used from a desulfurization computer 34, by which the number of the running units of the circulating pumps is controlled.</p> |
