ZHANG Yi, LI Jianbo, WANG Quanhai, et al. Simulation of NOx formation in novel dual circulating fluidized-bed boiler[J]. CIESC Journal, 2018, (4): 1703-1713. DOI: 10.11949/j.issn.0438-1157.20170919.
ZHANG Yi, LI Jianbo, WANG Quanhai, et al. Simulation of NOx formation in novel dual circulating fluidized-bed boiler[J]. CIESC Journal, 2018, (4): 1703-1713. DOI: 10.11949/j.issn.0438-1157.20170919.DOI:
The NOx formation of a novel dual circulating fluidized-bed (DCFB) boiler were numerically studied based on the detailed chemical reaction mechanism in a one dimensional chemical reaction network (1D-CRN). The sensitivity of NOx formation and the effect of reaction temperature
excess air ratio and primary air ratio were investigated. The results indicated that the NOx emission of traditional CFB was calculated to be 224.48 mg·m-3
while the value of DCFB was 97.29 mg·m-3
indicating that DCFB would reduce the NOx formation. In addition
the sensitivity analysis showed that the reactions such as R398
R1-N-1
R569 and R17 promoted NOx formation
while those including R411
R412
R570
R571
R5 and R6 inhibited NOx formation. Moreover
it was revealed that oxygen in the reaction zone was one contributing factor to NOx formation by the fact that less oxygen in the reaction zone would inhibit NOx formation. Likewise
NOx formation decreased with increasing reaction temperature but increased with increasing excess air ratio and primary air ratio.