| 摘要 |
PROBLEM TO BE SOLVED: To provide an ammonia injection control method of a denitration unit capable of equalizing actual outlet NOx of the denitration apparatus in a duct by simple constitution and capable of holding the value of outlet NOx to outlet NOx set value or less and an apparatus therefor. SOLUTION: Valve travel commands 14a, 14b are outputted to flow rate adjusting valves 10a, 10b from a controller 13 on the basis of the exhaust gas flow rates 4a, 4b detected by flowmeters 3a, 3b, the inlet NOx valves 6a, 6b detected by outlet NOx meters 7a, 7b and the actual ammonia injection amt. 12 detected by an ammonia meter 11 to adjust the value travel of the flow rate adjusting valves 10a, 10b and a required amt. of ammonia is injected into a duct 1 from ammonia injection pipes 9a, 9b. |
