Research On Tangentially Boiler Low No_x Combustion Optimization

Boiler low NO_x combustion optimization study can effectively reduce NO_x emission levels of the power plants, and safeguard economy at the same time, the rear flue gas denitration reducing costs, practical engineering significance. At present, for the higher NO_x emissions in the domestic power plants tangentially pulverized coal boiler, among many techniques of NO_x emission control, the transformation of low-NO_x combustion is one of the most economical, safest and best effective technologies to reduce NO_x emission.This paper will use numerical calculation to simulate the combustion of the furnace. By verifying the model correctly we will ameliorate the furnace, which increases the Separate Overfire Air System (SOFA) and narrow secondary air nozzle area of the main combustion zone. By analysis of the results, the program was found to be appropriate to reduce NO_x emissions, but also have a certain impact on the parameters of the outlet sections. And thus optimize the design by change the rate of SOFA wind and adjust the position of the SOFA vents, come about when the SOFA wind rate is 25% of the total amount of wind, and the position of the SOFA vents have a distance of 5 to 8 m from the the top primary air vents, the NO_x emission has best results, and at the same time, the other parameters of the furnace exit does not change much.