Abstract:

In order to study the characteristics of NO_x emission and ammonia escape after reform for six-corner tangentially fired boiler, we have done a large number of field tests. The results show that the NO_x emission before selective catalytic reduction (SCR) denitrification system are uneven distribution, there are too much ammonia injection in SCR denitrification system, they are the most important factors that lead to the uneven distribution of NO_x in export and the ammonia escape exceeds the design value, the ammonia injection of SCR needs to be optimized.

Key words: ammonia spraying optimization, NO_x distribution, selective catalytic reduction (SCR), ammonia escape