Abstract:After the ultra clean emission transformation of coal fired power unit, the amount of ammonia injected of denitrification system and mass concentration of regional ammonia escape were both increased. In order to conduct the ammoniainjected optimization test based on the concentration field of ammonia escape, the regional realtime mass concentration test of ammonia escape is necessary. Combined with a large number of testing experiences, this paper analyzes the problems of the M-NH3 portable ammonia escape analyzer that appeared in the field test, such as the light path correction, weak spectral signal, filter clogging, electrostatic interference, ammonium sulfate deposition, and the pollution of reflection probes and optical components, etc. After that, this paper summarizes the instrument maintenance measures, which improves the accuracy and stability of ammonia escape test.

Keywords:denitrification system, ammonia escape, portable analyzer, spectral signal, reflection probe