| 摘要 |
The NOx content of post-combustion waste gases is reduced by adding atomised ammoniacal water having an ammonia concentration of 10 % to 30 % by weight, and preferably 20 to 22 % by weight, to the waste gases at temperatures in the range 870 DEG C to 1090 DEG C. Preferably the reaction of the NH3, with the NOx in the waste gases is performed in a chamber containing a moving pebble bed, and the waste gases are passed from this chamber to a second pebble bed chamber in which removal of SOx is effected, particulates also being removed by the filter effect of the pebble beds. |
