To provide a method and an apparatus for stabilizing the concentration of nitrogen oxides in a denitrification apparatus outlet in a low level by injecting ammonia into the denitrification apparatus without being behind the change of the quantity of nitrogen oxides in the method or the apparatus for controlling the denitrification apparatus for denitrifying nitrogen oxides in a waste gas from a combustion apparatus with ammonia.
In the method and the apparatus for controlling the denitrification, the quantity of ammonia to be injected is controlled by a signal of the ammonia quantity obtained by setting the concentration of nitrogen oxides in the outlet of the denitrification apparatus and adding a value obtained by calculating an advance injecting ammonia quantity from a load differential value of a generator operated by a gas turbine or a boiler and a value obtained by calculating feed back ammonia quantity from the set concentration and the detected concentration of the nitrogen oxides in the denitrification apparatus outlet as calibration values to a basic ammonia quantity obtained by carrying out stoichiometric conversion to the quantity of the nitrogen oxides calculated by amplifying the quantity of the exhaust gas estimated from a fuel flow rate by the difference between the concentration of the nitrogen oxides in the denitrification apparatus inlet and the above set value in the outlet. The concentration of the nitrogen oxides in the denitrification apparatus inlet is calculated by an inlet nitrogen oxide concentration estimation model.
MIYAMOTO SHINICHI
IDEMOTO MASANORI
AOYAMA KUNIAKI
| JPH11267451A | 1999-10-05 | |||
| JPS6084132A | 1985-05-13 | |||
| JPH11333251A | 1999-12-07 | |||
| JP2001129354A | 2001-05-15 | |||
| JPH11267451A | 1999-10-05 | |||
| JPS6084132A | 1985-05-13 | |||
| JPH11333251A | 1999-12-07 | |||
| JP2001129354A | 2001-05-15 |