METHOD FOR ONLINE REGENERATION OF A CATALYST OF DENITRIFICATION OF SMOKE, AND FUME PURIFYING PLANT FOR CARRYING OUT SAID METHOD

摘要

In order to regenerate a fume denitrification catalyst (101) in line reliably and economically, the invention proposes a process in which: a catalyst regeneration fluid (1) is available which has a temperature at a time greater than that of the fumes to be denitrified (2) and between 220 ° C. and 450 ° C., - upstream of the catalyst, the catalyst feed region (V) is smelted into fumes in several fractions which, in cross section to the flue gas stream, each have a non-zero section, between 0.3 and 5 m at the catalyst, and - while the catalyst is fed, via all the fractions of the feed region, by fumes to denitrify (2) is successively supplied one by one the different fractions by the regeneration fluid (1), so that at least 80% of the amount of the regeneration fluid reaches the portion of the catalyst associated with the f reaction fed with regeneration fluid, by raising the temperature at the inlet surface of this portion of the catalyst to at least 220 ° C, preferably at least 250 ° C.