| 摘要 |
PROBLEM TO BE SOLVED: To provide a prime mover driving system with a denitration device, which prevents combustion exhaust gas having abnormal NOconcentration and NHconcentration from being discharged to the exterior, even when an abnormal condition occurs in the denitration device.SOLUTION: The prime mover driving system includes a prime mover 1; an exhaust passage 2 though which the combustion exhaust gas from the prime mover 1 flows; the denitration device 3 with a spray means for spraying a reducing agent onto the combustion exhaust gas flowing through the exhaust passage 2; an abnormal condition detection means 4 for detecting the abnormal condition of the denitration device 3; and a controller 5. The controller controls the activation and stop of the prime mover 1 and NOconcentration adjustment, and starts and stops the reducing agent spray by the spray means, and changes the amount of spray, and receives an abnormality signal from the abnormality detection means 4. The controller 5 drives the prime mover 1 by normal driving when the controller does not receive the abnormal condition signal from the abnormal condition detection means 4, and drives the prime mover 1 at a lower output than during the normal driving, or adjusts the NOconcentration when the controller receives the abnormal condition signal from the abnormal condition detection means 4 during the driving by the normal driving. |
