Experiments about application of regenerated catalyst in flue gas denitrification in a supercritical coal-fired unit was presented

including the pilot scale test

monolayer catalyst change and over-all unit catalyst change.The results show that

after the catalyst at the first layer in the SCR reactor was changed for the regenerated module

the differential pressure of catalyst at each layer decreased below the alarming value

and the NOxconcentration at outlet of the SCR reactor reduced to 74mg/m3

which satisfying the national standard's requirements.When the regenerated catalyst was changed in the entire SCR system and the ammonia escape concentration under each condition was about 2.5μg/g

the average denitration efficiency of the SCR system reached above 80%.Moreover

with the unit load of 600MW

the SO2/SO3conversion rate was 0.61%

and the SCR system ran safely and economically.