In order to develop the calculation model of deNOx by ammonia injection in high temperature reduction zone of pulverized coal combustion

the mechanism document of NO reduction process is optimized. Compared with the results of gas plunger flow experiment

Urea2000 mechanism can be used to predict NO. Urea2000 and coal combustion mechanism are combined to form a new Urea+Coal mechanism. Taking a one-dimensional furnace as the research object

the psr network of chemical kinetics analysis is generated by CFD and energico software.The Urea+Coal mechanism document and psr analysis network are combined to complete the whole mechanism analysis of one-dimensional pulverized coal combustion process. Taking the mole fraction of CO and NO as the criterion index

the whole mechanism file is simplified

and the simplified mechanism including 29 substances and 171 reactions is obtained. The simplified mechanism is coupled with CFD software to simulate the combustion process in the one-dimensional pulverized coal boiler. The simulation results are in good agreement with the experimental results

and the deviation of NO mole fraction is within 10%. The calculation model established by the simplified mechanism of Urea+coal and CFD can meet the requirements of performance prediction for ammonia injection denitration technology in high temperature reduction zone of pulverized coal combustion.