| 摘要 |
<p>PURPOSE:To suppress the excessive increase or reduction of the NOx quantity in the load variation by controlling the NOx control quantity so as to be proper for the proper quantity after the reaction time, having the control signal supplied from the load controller of a gas turbine as the preceding correction signal in the denitrification control. CONSTITUTION:The signal supplied from a load setting 11 is feedback-treated through a variation rate limit device 12 and an integration control circuit 13, and the signal (a) addition-calculated with the signal of the load setting 11 is calculated by the variation rate limit device 12 and the integration control circuit 13, and if the signal (a) increases the load setting 11 in a load controller having the deviation from the actual load 14 as load control quantity 15, the signal (a) changes as shown by 16, while if the load setting 11 is reduced, the signal changes as shown by 17. In other words, the NOx control quantity is controlled by correcting the load instruction as the forestage signal in the load variation, and the control disorder by the delay time in the NOx generation process is corrected. The excessive increase or reduction of NOx in the load variation is suppressed so that the NOx control quantity is proper for the proper quantity after the reaction time.</p> |
