| 摘要 |
PURPOSE:To satisfactorily perform denitration treatment without detecting the concn. of NOx, by detecting the position of the governor motor of an engine, the number of rotations of said motor, the input to a dynamo and the temp. of exhaust gas, etc., and controlling the injection quantity of NH3-gas correspond ing to the detection values. CONSTITUTION:The exhaust gas exhausted from an engine 1 is mixed with the NH3-gas injected from an injection pipeline 6 in a mixer 4 and subsequently subjected to selective reducing denitration in a catalyst tower 9. At this time, the position of a governor motor is detected by a governor motor position detector 4 and a flow rate control valve 8 is controlled on the basis of the detection value by a control apparatus 13 to inject NH3-gas in the optimum amount corresponding to the concn. of NOx in the exhaust gas. As detection objects, other than the position of the governor motor, there are the number of rotations of an engine, the voltage and current of the exciter in a dynamo, the temp. of the exhaust gas and the position of the capacity control valve of the cooling medium compressor in a heat pump, etc. |
