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This study developed a new model of low NOx combustion for the direct flow of pulverized coal, which enabled the relationships among gas temperature, oxygen concentration, time consumption, and distance to be investigated. A model of the ignition and combustion zone was discussed in detail. It was shown that the gas temperature and the oxygen concentration change with the distance. The proper position...
This study presents a method to analyze the effects of water vapor on the pyrolysis products of pulverized coal by using a software Factsage, which is different from existing numerous experimental approach. Water vapor can enhance the formation of the N-containing compounds NH3 and HCN, and also improve CO and H2 yields during pulverized coal pyrolysis, which is helpful to restrain NOx formation during...
This study developed a new model for the low NOx ignition for the direct flow of pulverized coal, which enabled the influence of the primary air and internally recirculated flue gas (RFG) on NOx formation to be investigated. A model of the preignition zone was discussed in detail. Three new parameters, the Local Stoichiometric Ratio of Volatiles(LSRV), the Virtual Temperature of Ignition (VTI) and...
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